:root{color-scheme:dark;--navy:#080f21;--silver:#dbe3f0;--muted:#abb6cd;--serif:"Noto Serif JP","Yu Mincho","Hiragino Mincho ProN",serif;--latin:"Cormorant Garamond",Georgia,serif}
*{box-sizing:border-box}html,body{margin:0;min-width:320px}body{background:var(--navy);color:var(--silver);font-family:var(--serif);-webkit-font-smoothing:antialiased}p,h1,h2{margin:0}
.hero{position:relative;isolation:isolate;overflow:hidden;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;background:radial-gradient(ellipse at 50% 42%,#1c3153 0%,#101b34 34%,#080e20 72%)}
.universe{position:absolute;inset:0;z-index:-1;overflow:hidden;pointer-events:none}.universe:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,#070e2066,transparent 25%,transparent 60%,#070d1be6);z-index:5}
.nebula{position:absolute;inset:-30%;background:radial-gradient(ellipse at 61% 45%,#a8c6ec20 0%,transparent 32%),radial-gradient(ellipse at 30% 58%,#496d9f30,transparent 38%);transform:rotate(-24deg);filter:blur(35px)}
.stars{position:absolute;inset:0;background-repeat:repeat;opacity:.7}.stars--near{background-image:radial-gradient(1px 1px at 32px 46px,#dde9fa 85%,transparent),radial-gradient(1px 1px at 201px 194px,#b3c8e8 70%,transparent),radial-gradient(1.3px 1.3px at 374px 90px,#ceddf8 60%,transparent),radial-gradient(.8px .8px at 101px 293px,#fff 75%,transparent);background-size:463px 347px}.stars--far{background-image:radial-gradient(.7px .7px at 73px 90px,#b9ccec 80%,transparent),radial-gradient(.8px .8px at 142px 150px,#bdc7db 75%,transparent),radial-gradient(.6px .6px at 19px 36px,#d8e7ff 70%,transparent);background-size:213px 187px;opacity:.45}
.portal{position:absolute;left:50%;top:44%;border-radius:50%;transform:translate(-50%,-50%) rotate(-27deg);width:740px;height:527px}.portal--main{border:1px solid #c4dcff55;box-shadow:inset 0 0 28px #b8d2ff0a,0 0 16px #bddeff20;border-top-color:#e9f2ffdc;border-left-color:#9bbce592;border-bottom-color:#dfeaff99;background:linear-gradient(155deg,#cbdeff04,transparent 40%)}.portal--main:after{content:"";position:absolute;inset:-2px;border-radius:inherit;border:2px solid transparent;border-top-color:#e5f1ffa0;filter:blur(3px)}.portal--outer{width:767px;height:552px;border:1px solid #c8dfff1b;transform:translate(-50%,-50%) rotate(-30deg)}.portal--inner{width:724px;height:512px;border:1px solid #c8dfff12;transform:translate(-50%,-50%) rotate(-24deg)}.portal-halo{position:absolute;left:50%;top:44%;width:816px;height:604px;transform:translate(-50%,-50%) rotate(-27deg);border-radius:50%;border:36px solid #bbd6ff09;filter:blur(23px)}

.masthead{display:flex;justify-content:space-between;align-items:center;padding:30px 4.3%;position:relative;z-index:6}.brand{display:flex;flex-direction:column}.brand-overline{font-family:Arial,sans-serif;font-size:14px;letter-spacing:.48em;padding-left:2px}.brand-name{font-family:var(--latin);font-size:29px;letter-spacing:.015em}.brand-star{display:inline-block;font-size:22px;padding-left:9px;vertical-align:top}

.hero-content{text-align:center;width:min(100% - 64px,1040px);margin:auto;position:relative;z-index:6;padding:20px 0 36px}
h1{font-weight:500;font-size:clamp(120px,13.7vw,196px);line-height:1.36;letter-spacing:.18em;text-indent:.18em;margin:6px 0 -3px;background:linear-gradient(130deg,#f7faff 14%,#d4ddec 42%,#96a7c0 62%,#edf4ff 84%);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 2px 24px #c6dfff13)}
.subtitle{font-size:clamp(20px,2.4vw,31px);font-weight:400;letter-spacing:.17em;line-height:1.8;color:#e4eaf4}.subtitle ruby{ruby-align:center}.subtitle rt{font-family:var(--serif);font-size:14px;letter-spacing:.15em;color:#becde3}.sub-subtitle{font-size:14px;color:#b2bed2;letter-spacing:.12em;line-height:2.1;margin-top:0}.event-meta{margin-top:39px}.event-date{display:flex;align-items:baseline;justify-content:center;gap:8px;font-family:"noto-serif-jp",sans-serif;font-weight:300;font-style:normal;font-variant-numeric:lining-nums tabular-nums;line-height:1.1}.year{font-size:33px}.day{font-size:64px;letter-spacing:.02em}.weekday{font-family:Arial,sans-serif;font-size:14px;letter-spacing:.1em;margin-left:9px;align-self:center;text-align:left;border-left:1px solid #8895ad70;padding-left:15px}.weekday>span{display:block;font-family:var(--serif);font-size:14px;letter-spacing:.05em;margin-top:7px;color:#b8c3d8}.venue{font-size:15px;letter-spacing:.12em;margin-top:16px}.venue>span{margin-left:.7em}.sessions{display:flex;justify-content:center;gap:27px;margin-top:23px;font-family:Arial,"Hiragino Kaku Gothic ProN",sans-serif;font-size:14px;color:#bfcadd}.sessions p{display:flex;align-items:center;gap:10px}.session-label{border:1px solid #899bb64d;padding:4px 8px;font-size:14px;letter-spacing:.1em}.divider{margin:0 9px;color:#6b7e9e}

.ticket-strip{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:76px;padding:14px 4.3%;border-top:1px solid #a3b8d632;background:linear-gradient(100deg,#172136,#101a2d 65%,#182236);font-family:Arial,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif}.reception{display:flex;align-items:center;gap:16px}.status-dot{width:5px;height:5px;background:#dbe7fa;box-shadow:0 0 10px #dae9ff6b;border-radius:50%}.reception>p{font-size:14px;letter-spacing:.09em;display:flex;align-items:center;gap:21px;white-space:nowrap}.reception-date{font:32px var(--latin);letter-spacing:.02em}.reception-date small{font:14px Arial,sans-serif;margin:0 8px 0 3px}.reception-date>span{font-size:27px}.ticket-prices{display:flex;align-items:center;gap:24px}.ticket-prices p{font-size:14px;color:#b6c1d4;white-space:nowrap}.ticket-prices strong{font-family:var(--latin);font-size:28px;font-weight:400;color:#e2e8f2;margin-left:10px}.ticket-prices strong span{font-family:var(--serif);font-size:14px;margin-left:3px}.price-separator{width:1px;height:25px;background:#8c9bb636}.ticket-note{font-size:14px;color:#9cacc6;letter-spacing:.04em}
@media(min-width:1600px){.hero-content{padding-bottom:60px}.event-meta{margin-top:45px}.portal{width:850px;height:595px}.portal--outer{width:879px;height:620px}.portal--inner{width:831px;height:578px}}
@media(max-width:1150px){.ticket-strip{flex-wrap:wrap;justify-content:center;gap:12px 35px}.ticket-note{width:100%;text-align:center}.ticket-prices{gap:20px}}
@media(max-width:700px){.hero{min-height:100vh;min-height:100dvh}.masthead{padding:24px 23px}.brand-name{font-size:25px}.brand-overline{font-size:14px}.hero-content{width:calc(100% - 32px);padding:27px 0 42px}h1{font-size:130px;letter-spacing:.1em;text-indent:.1em;margin:15px 0 0}.subtitle{font-size:20px;letter-spacing:.08em}.subtitle rt{font-size:14px}.sub-subtitle{font-size:14px;letter-spacing:.09em;margin-top:0}.sub-subtitle>span{display:block}.event-meta{margin-top:34px}.day{font-size:58px}.year{font-size:30px}.venue{font-size:14px;letter-spacing:.04em;margin-top:18px}.sessions{flex-direction:column;align-items:center;gap:11px;margin-top:21px;font-size:14px}.sessions p{gap:14px}.session-label{padding:3px 9px}.portal{top:40%;width:442px;height:374px;transform:translate(-50%,-50%) rotate(-49deg)}.portal--outer{width:464px;height:394px}.portal--inner{width:426px;height:360px}.portal-halo{top:40%;width:468px;height:400px;transform:translate(-50%,-50%) rotate(-49deg)}.ticket-strip{min-height:136px;padding:14px 18px;gap:8px}.reception>p{font-size:14px;gap:20px}.reception-date{font-size:30px}.ticket-prices{gap:14px;width:100%;justify-content:center}.ticket-prices p{font-size:14px}.ticket-prices strong{font-size:25px;margin-left:6px}.ticket-note{font-size:14px}.price-separator{height:19px}}
@media(max-width:360px){h1{font-size:112px}.subtitle{font-size:18px}.ticket-prices{gap:9px}.ticket-prices strong{font-size:22px}}

/* 異なる速度で星を流し、奥行きと穏やかな瞬きを加える。 */
.stars--near{animation:stars-drift-near 100s linear infinite,stars-twinkle-near 7s ease-in-out infinite}
.stars--far{animation:stars-drift-far 140s linear infinite,stars-twinkle-far 11s ease-in-out infinite}
@keyframes stars-drift-near{from{background-position:0 0}to{background-position:463px -347px}}
@keyframes stars-drift-far{from{background-position:0 0}to{background-position:213px -187px}}
@keyframes stars-twinkle-near{0%,100%{opacity:.7}50%{opacity:.4}}
@keyframes stars-twinkle-far{0%,100%{opacity:.3}50%{opacity:.6}}
@media(prefers-reduced-motion:reduce){.stars--near,.stars--far{animation:none}}

/* 光の輪は傾きを固定し、緩やかな歪みのみを残す。 */
.portal,.portal-halo{--portal-angle:-27deg;transform:translate(-50%,-50%) rotate(var(--portal-angle));animation:portal-morph 20s ease-in-out infinite}
.portal--outer{--portal-angle:-30deg;animation-duration:26s;animation-direction:reverse}
.portal--inner{--portal-angle:-24deg;animation-duration:23s;animation-direction:normal}
.portal-halo{animation-duration:20s}


@media(max-width:700px){.portal,.portal-halo{--portal-angle:-49deg}}
@media(prefers-reduced-motion:reduce){.portal,.portal-halo{animation:none}}

/* 支給ロゴの輪郭を描いてから、本来の塗りへ移行する。初回表示時のみ再生。 */
.brand{flex-shrink:0}
.brand-logo{display:block;width:220px;max-width:100%;height:auto;overflow:visible;color:var(--silver)}
.brand-logo-lines{fill:none;stroke:currentColor;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;animation:logo-lines-fade .7s ease 2.8s both}
.brand-logo-lines path{stroke-dasharray:1;stroke-dashoffset:0;animation:logo-draw 2.2s cubic-bezier(.4,0,.2,1) var(--draw-delay,0s) both}
.brand-logo-fill{fill:currentColor;animation:logo-fill-in 1s ease 2.3s both}
@keyframes logo-draw{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}
@keyframes logo-fill-in{from{opacity:0}to{opacity:1}}
@keyframes logo-lines-fade{from{opacity:1}to{opacity:0}}
@media(max-width:700px){.brand-logo{width:166px}}
@media(max-width:360px){.brand-logo{width:146px}}
@media(prefers-reduced-motion:reduce){
  .brand-logo-lines,.brand-logo-lines path,.brand-logo-fill{animation:none}
  .brand-logo-lines{display:none}
  .brand-logo-fill{opacity:1}
}

/* 輪の形を非対称に変え、境界の内側だけに薄い光の膜を閉じ込める。 */
@keyframes portal-morph{
  0%,100%{border-radius:50% 50% 50% 50% / 50% 50% 50% 50%}
  33%{border-radius:46% 54% 48% 52% / 55% 46% 54% 45%}
  67%{border-radius:54% 46% 53% 47% / 47% 54% 46% 53%}
}
.portal-membrane{position:absolute;inset:1px;border-radius:inherit;overflow:hidden;isolation:isolate;pointer-events:none;background:radial-gradient(ellipse at 28% 19%,#deeeff0d,transparent 57%),linear-gradient(145deg,#bccfff07,transparent 48%,#a9c9f310);box-shadow:inset 0 0 38px #c0dbff0c}
.portal-membrane:before,.portal-membrane:after{content:"";position:absolute;inset:-35%;pointer-events:none}
.portal-membrane:before{background:linear-gradient(118deg,transparent 33%,#b2d4ff04 39%,#ddecff20 44%,#b9d8ff09 47%,transparent 52%,#d9edff0c 58%,transparent 65%);filter:blur(14px);animation:membrane-flow 17s ease-in-out infinite}
.portal-membrane:after{background:radial-gradient(ellipse at 65% 35%,transparent 30%,#d9edff12 40%,transparent 48%),linear-gradient(45deg,transparent 48%,#dceaff0b 54%,transparent 61%);filter:blur(10px);animation:membrane-flow 23s ease-in-out -8s infinite reverse}
.membrane-ripple{position:absolute;left:-12%;top:7%;width:123%;height:69%;border-radius:43% 57% 54% 46% / 43% 39% 61% 57%;border-top:1px solid #deecff21;border-bottom:1px solid #c3ddff0b;box-shadow:0 -9px 22px #bfdcff05;animation:membrane-ripple 19s ease-in-out infinite}
.membrane-ripple--two{left:-18%;top:32%;width:136%;height:65%;opacity:.6;animation-duration:25s;animation-delay:-9s;animation-direction:reverse}
@keyframes membrane-flow{
  0%,100%{transform:translate(-5%,-3%) rotate(-8deg) scale(1);opacity:.45}
  50%{transform:translate(7%,5%) rotate(9deg) scale(1.07);opacity:.85}
}
@keyframes membrane-ripple{
  0%,100%{transform:translateY(-4%) rotate(-12deg) scaleY(.94);border-radius:43% 57% 54% 46% / 43% 39% 61% 57%;opacity:.35}
  50%{transform:translateY(10%) rotate(6deg) scaleY(1.06);border-radius:56% 44% 46% 54% / 57% 52% 48% 43%;opacity:.75}
}
@media(max-width:700px){.portal-membrane:before,.portal-membrane:after{filter:blur(8px)}}
@media(prefers-reduced-motion:reduce){
  .portal-membrane:before,.portal-membrane:after,.membrane-ripple{animation:none}
}

/* リンク先は未設定。イベント案内の項目だけを表示。 */
.masthead{gap:28px}
.event-nav{min-width:0}
.event-nav ul{display:flex;justify-content:flex-end;align-items:center;flex-wrap:wrap;gap:14px 24px;list-style:none;margin:0;padding:0}
.event-nav li{font-size:14px;line-height:1.8;letter-spacing:.03em;color:#c5cfe0;white-space:nowrap}
@media(max-width:1100px){.event-nav ul{gap:10px 20px}}
@media(max-width:700px){
  .masthead{flex-direction:column;align-items:flex-start;gap:22px}
  .event-nav{width:100%;padding-top:16px;border-top:1px solid #a3b8d626}
  .event-nav ul{justify-content:flex-start;gap:8px 18px}
}

/* 中央の見出しと開催情報を少しコンパクトにして余白を増やす。 */
.hero-content{padding-top:16px;padding-bottom:30px}
.hero-content h1{font-size:clamp(90px,10.25vw,147px)}
.subtitle{font-size:clamp(20px,2.16vw,28px)}

.sub-subtitle{margin-top:0}
.event-meta{margin-top:33px}
.day{font-size:56px}
.year{font-size:30px}
.sessions{margin-top:20px}
@media(min-width:1600px){.hero-content{padding-bottom:50px}.event-meta{margin-top:38px}}
@media(max-width:700px){
  .hero-content{padding:23px 0 35px}
  .hero-content h1{font-size:97px}
  .subtitle{font-size:19px}

  .sub-subtitle{margin-top:0}
  .event-meta{margin-top:29px}
  .day{font-size:51px}
  .year{font-size:27px}
  .sessions{margin-top:18px}
}
@media(max-width:360px){.hero-content h1{font-size:84px}.subtitle{font-size:18px}}

/* 主題と副題の間に下マージンを設けない。 */
.hero-content h1{margin-bottom:0}

/* 開催日はAdobe FontsのNoto Serif JP Lightを使用。 */
.event-date .day{font-size:50px;letter-spacing:.015em}
.event-date .year{font-size:50px;letter-spacing:.015em}
@media(max-width:700px){.event-date .day{font-size:44px}.event-date .year{font-size:44px}}

.event-date .weekday,.event-date .weekday>span{font-family:inherit;font-weight:inherit;font-style:normal}

@media(max-width:380px){.event-date .year,.event-date .day{font-size:36px}}

/* 曜日と区切り線の視認性を少し高める。 */
.event-date .weekday{font-weight:500;border-left:1px solid #b6c5dc99;color:#e4ebf6}
.event-date .weekday>span{font-weight:500;color:#d5deed}

/* 輪に対して下がって見える文字ブロックの重心を補正。 */
.hero-content{top:-36px}
@media(max-width:700px){.hero-content{top:-12px}}

/* MVはウィンドウ高を基準にし、内容が多い場合は自然に伸ばす。 */
.hero>.masthead,.hero>.hero-content{flex-shrink:0}







/* 輪と光彩の中心を少し下げ、中央の文字に合わせる。 */
.portal,.portal-halo{top:48%}
@media(max-width:700px){.portal,.portal-halo{top:44%}}

/* 時折流れる流星。文字の背面で、細い尾を静かに引く。 */
.meteor-layer{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:1}
.meteor{position:absolute;height:1.5px;opacity:0;transform-origin:left center;border-radius:50%;background:linear-gradient(90deg,#f8fbff 0%,var(--meteor-color) 9%,transparent 100%);filter:drop-shadow(0 0 4px var(--meteor-color));will-change:transform,opacity}
.meteor:before{content:"";position:absolute;left:0;top:50%;width:3px;height:3px;border-radius:50%;background:#f6faff;transform:translate(-50%,-50%);box-shadow:0 0 6px 1px var(--meteor-color)}
@media(prefers-reduced-motion:reduce){.meteor-layer{display:none}}

/* 読み仮名の文字間を少し広げる。 */
.subtitle rt{letter-spacing:.35em;text-indent:.35em}

/* 輪の内側に広がる抽象的な深海。輪の傾きを相殺し、光は上から差す。 */
.portal-membrane{background:#061629;box-shadow:inset 0 0 45px #bcdcff12}
.deep-sea{position:absolute;inset:-45%;z-index:-1;overflow:hidden;transform:rotate(calc(-1 * var(--portal-angle)));background:radial-gradient(ellipse at 50% 24%,#296885 0%,#164059 19%,#0a263e 38%,#051627 59%,#030c1b 79%)}
.sea-surface{position:absolute;left:18%;right:18%;top:20%;height:11%;background:radial-gradient(ellipse,#aedff54d 0%,#79b9d921 40%,transparent 72%);filter:blur(18px);animation:sea-surface-glow 15s ease-in-out infinite}





.sea-particles{position:absolute;inset:-10%;background-repeat:repeat;mask-image:radial-gradient(ellipse,#000 12%,transparent 65%);-webkit-mask-image:radial-gradient(ellipse,#000 12%,transparent 65%)}
.sea-particles--near{background-image:radial-gradient(1.2px 1.2px at 26px 49px,#d5f3ff99 50%,transparent),radial-gradient(1px 1px at 119px 134px,#9ed9f280 50%,transparent),radial-gradient(.8px .8px at 189px 77px,#daf5ff80 50%,transparent);background-size:237px 209px;opacity:.6;animation:sea-particles-float 32s ease-in-out infinite alternate}
.sea-particles--far{background-image:radial-gradient(.8px .8px at 45px 87px,#b9e9fa66 50%,transparent),radial-gradient(.7px .7px at 172px 24px,#c9eefa66 50%,transparent);background-size:201px 173px;opacity:.4;animation:sea-particles-float 43s ease-in-out -15s infinite alternate-reverse}

@keyframes sea-surface-glow{0%,100%{opacity:.55;transform:scaleX(.94)}50%{opacity:.85;transform:scaleX(1.06)}}
@keyframes sea-particles-float{from{transform:translate(-8px,18px)}to{transform:translate(12px,-22px)}}
@media(max-width:700px){.sea-surface{filter:blur(12px)}}
@media(prefers-reduced-motion:reduce){.sea-surface,.sea-particles{animation:none}}

/* 光の筋をなくし、水の上層から淡くにじむ環境光へ。 */
.deep-sea{background:radial-gradient(ellipse at 43% 21%,#234257 0%,#142e43 24%,#0a1e32 43%,#061426 65%,#030c1b 85%)}
.sea-surface{left:5%;right:5%;top:8%;height:38%;background:radial-gradient(ellipse,#abc9dc16 0%,#7fa7bf0b 38%,transparent 72%);filter:blur(30px);animation:sea-surface-glow 24s ease-in-out infinite}
@keyframes sea-surface-glow{0%,100%{opacity:.4;transform:translateX(-2%) scaleX(.98)}50%{opacity:.65;transform:translateX(2%) scaleX(1.02)}}
.portal-membrane:before{opacity:.2;animation:none;background:radial-gradient(ellipse at 40% 20%,#c1d8ed16,transparent 60%);filter:blur(24px)}
.portal-membrane:after{opacity:.15;animation:none;background:radial-gradient(ellipse at 65% 35%,#a8c7e310,transparent 65%);filter:blur(24px)}
.membrane-ripple{display:none}
@media(prefers-reduced-motion:reduce){.sea-surface{animation:none}}

/* 水中で拡散する光。三角形の輪郭を作らず、細長い光のにじみを重ねる。 */
.deep-sea{background:radial-gradient(ellipse at 46% 22%,#28566a 0%,#153e55 22%,#0b283f 42%,#06192d 62%,#030d1e 85%)}
.sea-soft-light{position:absolute;top:14%;height:66%;width:20%;transform-origin:50% 0;background:radial-gradient(ellipse at 50% 12%,#c9edf548 0%,#98d3e52b 23%,#68adca14 44%,transparent 70%);filter:blur(19px);animation:sea-light-sway 19s ease-in-out infinite alternate;pointer-events:none}
.sea-soft-light--one{left:34%;--light-tilt:14deg}
.sea-soft-light--two{left:50%;width:25%;height:61%;--light-tilt:-10deg;animation-duration:26s;animation-delay:-11s;background:radial-gradient(ellipse at 50% 10%,#bce6f035 0%,#8bcede1f 26%,#579db50c 48%,transparent 72%)}
.sea-surface{top:12%;height:28%;background:radial-gradient(ellipse,#b1dce72b 0%,#7ab5c91c 36%,transparent 73%);filter:blur(24px)}
.sea-surface:after{content:"";position:absolute;inset:8% 0;background:repeating-radial-gradient(ellipse at 47% 20%,transparent 0 15px,#b7e4ef21 19px,transparent 27px 46px);transform:scaleY(.3) rotate(-4deg);filter:blur(4px);mask-image:radial-gradient(ellipse,#000,transparent 69%);-webkit-mask-image:radial-gradient(ellipse,#000,transparent 69%);opacity:.65}
@keyframes sea-light-sway{from{transform:rotate(calc(var(--light-tilt) - 3deg)) scaleX(.92);opacity:.55}to{transform:rotate(calc(var(--light-tilt) + 3deg)) scaleX(1.12);opacity:.85}}
@media(max-width:700px){.sea-soft-light{filter:blur(14px)}}
@media(prefers-reduced-motion:reduce){.sea-soft-light{animation:none;transform:rotate(var(--light-tilt));opacity:.65}}

/* 水中光はJavaScriptで滑らかにランダム変化。泡は輪の内側だけに表示。 */
.ocean-animated .sea-soft-light{animation:none;transform:rotate(var(--light-tilt));opacity:.6}
.sea-bubbles{position:absolute;inset:22% 18% 18%;pointer-events:none}
.sea-bubble{position:absolute;bottom:0;border:1px solid #bde5ee70;border-radius:50%;background:radial-gradient(circle at 30% 25%,#e3f8ff85 0%,#a6d5e31a 25%,transparent 62%);box-shadow:inset -1px -1px 2px #5c9caf18;opacity:0;will-change:transform,opacity}
@media(prefers-reduced-motion:reduce){.sea-bubbles{display:none}}

/* 背景の星より円を手前に固定する。 */
.nebula{z-index:0}
.stars,.meteor-layer{z-index:1}
.portal-halo{z-index:2}
.portal{z-index:3}
.portal--main{background-color:#061629}

/* 星を個別に配置し、それぞれ異なる方向・速度・明るさで漂わせる。 */
.stars.stars--random{background-image:none;animation:none;opacity:1}
.wandering-star{position:absolute;display:block;border-radius:50%;background:#dceaff;pointer-events:none}
.stars--near .wandering-star{box-shadow:0 0 3px #bad6ff30}

/* 受付・料金の帯をMVの最下部に配置。内容と重ならず高さを確保する。 */
.hero>.ticket-strip{position:relative;z-index:6;flex-shrink:0;width:100%}

/* 写真のガラス越しの反射を生かし、左の深海から右の人物へつなげる。 */
.hero--portrait{background:#071324}
.hero-portrait{position:absolute;inset:0;z-index:-2;overflow:hidden;pointer-events:none}
.hero-portrait img{display:block;width:100%;height:100%;object-fit:cover;object-position:73% 42%;filter:saturate(.72) brightness(.86)}
.hero-portrait:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#061020 0%,#071425f5 20%,#09192bdc 36%,#0a1c30a6 48%,#0a1c3033 63%,#08172908 82%,#07142533),linear-gradient(180deg,#061020b8 0%,transparent 24%,transparent 67%,#071324f5 100%)}
.hero--portrait .universe:after{background:linear-gradient(180deg,#070e202b,transparent 24%,transparent 68%,#07132499)}
.hero--portrait .stars{mask-image:linear-gradient(90deg,#000 0%,#000 34%,transparent 66%);-webkit-mask-image:linear-gradient(90deg,#000 0%,#000 34%,transparent 66%)}
.hero--portrait .nebula{opacity:.45}
.hero--portrait .portal,.hero--portrait .portal-halo{left:31%;top:calc(46% + 30px)}
.hero--portrait .portal--main{background-color:#061629;border-top-color:#e9f2ff80;border-bottom-color:#dfeaff4d;box-shadow:0 0 24px #bddeff0c}
.hero--portrait .portal-membrane{opacity:.68}
.hero--portrait .portal-halo{opacity:.55}
.hero--portrait .portal--outer,.hero--portrait .portal--inner{opacity:.65}
.hero--portrait .hero-content{width:54%;margin:auto auto auto 4%;top:-52px;padding:36px 12px 44px}
.hero--portrait h1{filter:drop-shadow(0 3px 26px #040b1a80)}
.hero--portrait .subtitle{font-size:clamp(20px,1.9vw,28px);letter-spacing:.12em}
.hero--portrait .sub-subtitle{color:#c2cddd;letter-spacing:.07em}
.hero--portrait .event-meta{margin-top:35px}
.hero--portrait .venue{color:#d5dfec}
.hero--portrait .ticket-strip{background:linear-gradient(100deg,#101e30f5,#102135ee 65%,#172d40e8);border-top-color:#bccfe337}
@media(min-width:1600px){.hero--portrait .hero-content{width:52%;margin-left:5%}}
@media(min-width:701px) and (max-width:1100px){
  .hero--portrait .masthead{align-items:flex-start}
  .hero--portrait .hero-content{width:59%;margin-left:0;padding-left:16px;padding-right:16px}
  .hero--portrait .portal,.hero--portrait .portal-halo{left:30%}
  .hero--portrait .subtitle{font-size:21px;letter-spacing:.06em}
  .hero--portrait .sub-subtitle{font-size:14px;max-width:370px;margin-left:auto;margin-right:auto}
  .hero--portrait .sessions{gap:15px;flex-wrap:wrap}
}
@media(max-width:700px){
  .hero--portrait .hero-portrait{top:115px;bottom:auto;height:500px}
  .hero--portrait .hero-portrait img{object-position:76% 38%;filter:saturate(.72) brightness(.9)}
  .hero--portrait .hero-portrait:after{background:linear-gradient(180deg,#071324 0%,#07132433 18%,transparent 38%,#07132480 69%,#071324 98%),linear-gradient(90deg,#07132455,transparent 65%)}
  .hero--portrait .masthead{background:linear-gradient(#071324,#071324cc,transparent)}
  .hero--portrait .hero-content{width:100%;margin:300px 0 0;top:-40px;padding:12px 20px 36px}
  .hero--portrait .portal,.hero--portrait .portal-halo{left:50%;top:695px}
  .hero--portrait .portal-membrane{opacity:.55}
  .hero--portrait .subtitle{font-size:19px;letter-spacing:.08em}
  .hero--portrait .sub-subtitle{font-size:14px;max-width:330px;margin-left:auto;margin-right:auto;line-height:2}
  .hero--portrait .event-meta{margin-top:27px}
  .hero--portrait .stars{mask-image:linear-gradient(180deg,transparent 9%,transparent 30%,#000 57%);-webkit-mask-image:linear-gradient(180deg,transparent 9%,transparent 30%,#000 57%)}
}
@media(max-width:360px){.hero--portrait .subtitle{font-size:18px}.hero--portrait .hero-content{padding-left:14px;padding-right:14px}}

/* 各ナビの上に小さな英語ラベルを添える。 */
.event-nav li{display:flex;flex-direction:column;align-items:center;gap:3px}
.nav-en{font-family:Arial,sans-serif;font-size:14px;font-weight:400;line-height:1.4;letter-spacing:.16em;color:#b9c9db}
@media(max-width:700px){.event-nav li{align-items:flex-start}.nav-en{font-size:14px;letter-spacing:.13em}}

/* 帯の英数字もメインの日付と同じAdobe Fontsに統一。 */
.reception-date,.reception-date small,.ticket-prices strong{font-family:"noto-serif-jp",sans-serif;font-weight:300;font-style:normal;font-variant-numeric:lining-nums tabular-nums}

/* 受付日時と価格の数字を同じサイズに揃える。 */
.ticket-strip{--ticket-number-size:28px}
.ticket-strip .reception-date,.ticket-strip .reception-date>span,.ticket-strip .ticket-prices strong{font-size:var(--ticket-number-size)}
@media(max-width:700px){.ticket-strip{--ticket-number-size:25px}}
@media(max-width:360px){.ticket-strip{--ticket-number-size:22px}}

/* 料金の右側に申し込みボタン。受付開始までは操作を無効化。 */
.ticket-action{flex-shrink:0;display:flex;flex-direction:column;align-items:center;gap:4px}
.ticket-button{display:flex;justify-content:space-between;align-items:center;gap:24px;min-height:44px;min-width:230px;padding:11px 20px;border:1px solid #dce6f2;border-radius:2px;background:linear-gradient(115deg,#e4ebf4,#b9c9da);color:#14243a;font-family:var(--serif);font-size:14px;font-weight:500;letter-spacing:.05em}
.ticket-button:disabled{opacity:1;cursor:default}
.ticket-button>span{font-family:Arial,sans-serif;font-size:19px;font-weight:400}
.ticket-action .ticket-note{width:auto;line-height:1.4;text-align:center;font-size:14px}
@media(max-width:1150px){.ticket-action{margin-left:auto}.ticket-strip{column-gap:22px}}
@media(max-width:900px){.ticket-action{margin:0}.ticket-strip{justify-content:center}}
@media(max-width:700px){.ticket-action{width:100%;margin-top:6px}.ticket-button{width:min(100%,340px)}}

/* 加工済み写真の異次元空間と反射が見えるよう、重ね色を控えめに。 */
.hero--portrait .hero-portrait img{filter:saturate(.92) brightness(.98)}
.hero--portrait .hero-portrait:after{background:linear-gradient(90deg,#06102070 0%,#07142555 30%,#09192b30 46%,transparent 66%),linear-gradient(180deg,#06102080 0%,transparent 23%,transparent 73%,#071324cc 100%)}
@media(max-width:700px){
  .hero--portrait .hero-portrait:after{background:linear-gradient(180deg,#071324 0%,#07132426 18%,transparent 38%,#07132470 69%,#071324 98%)}
}

/* 料金と申し込みを帯の右側にまとめる。 */
@media(min-width:901px){
  .hero>.ticket-strip{justify-content:flex-start;column-gap:32px}
  .ticket-strip .ticket-prices{margin-left:auto}
  .ticket-strip .ticket-action{margin-left:0}
}






/* 中間幅では円が人物の顔を覆わない大きさに抑える。 */
@media(min-width:701px) and (max-width:1100px){
  .hero--portrait .portal{width:60vw;height:43vw}
  .hero--portrait .portal--outer{width:62vw;height:45vw}
  .hero--portrait .portal--inner{width:58vw;height:41vw}
  .hero--portrait .portal-halo{width:65vw;height:48vw}
}

/* 雲海と宇宙の写真が見えるよう、円の内部は薄い膜に戻す。 */
.hero--clouds .portal--main{background-color:transparent}
.hero--clouds .portal-membrane{background:transparent;opacity:.4}
.hero--clouds .deep-sea{background:transparent}
.hero--clouds .portal--outer,.hero--clouds .portal--inner{opacity:.4}
.hero--clouds .hero-portrait:after{background:linear-gradient(90deg,#0610208c 0%,#07142555 30%,#09192b30 46%,transparent 68%),linear-gradient(180deg,#06102088,transparent 25%,transparent 70%,#071324d9)}
@media(max-width:700px){.hero--clouds .hero-portrait:after{background:linear-gradient(180deg,#071324 0%,#07132426 18%,transparent 38%,#07132470 69%,#071324 98%)}}
.hero--clouds .hero-portrait:after{background:linear-gradient(90deg,#061020b8 0%,#071425a6 35%,#09192b80 48%,transparent 69%)}
.hero--clouds .masthead{background:transparent}
.venue-link{display:inline-flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px 10px;color:inherit;text-decoration:none}
.venue-external{display:inline-flex;align-items:center;gap:5px;font-size:14px;letter-spacing:.03em;white-space:nowrap}
.venue-external svg{flex-shrink:0}
.venue-link:hover{text-decoration:underline;text-underline-offset:4px}
.venue-link:focus-visible{outline:1px solid currentColor;outline-offset:5px;border-radius:2px}
@media(max-width:700px){.hero--clouds .hero-portrait:after{background:none}}

/* 円の輪郭から、一つの波紋が外へ広がる。 */
.portal-wave{position:absolute;inset:-1px;border:1px solid #c6e0f5;border-radius:inherit;pointer-events:none;opacity:0;transform:scale(1);animation:portal-wave-expand 12s linear infinite}
@keyframes portal-wave-expand{
  0%{transform:scale(1);opacity:0}
  8%{opacity:.38}
  48%{opacity:.12}
  70%,100%{transform:scale(1.25);opacity:0}
}
@media(prefers-reduced-motion:reduce){.portal-wave{animation:none;display:none}}

/* 開場・開演の案内を少し大きく。 */
.sessions{font-size:14px}
.session-label{font-size:14px}

/* 初回表示に合わせて、ナビと本文を静かに順番に見せる。 */
@media(prefers-reduced-motion:no-preference){
  .event-nav li{animation:nav-reveal 1s cubic-bezier(.22,1,.36,1) both;animation-delay:.35s}
  .event-nav li:nth-child(2){animation-delay:.45s}
  .event-nav li:nth-child(3){animation-delay:.55s}
  .event-nav li:nth-child(4){animation-delay:.65s}
  .event-nav li:nth-child(5){animation-delay:.75s}
  .event-nav li:nth-child(6){animation-delay:.85s}
  .event-nav li:nth-child(7){animation-delay:.95s}
  .hero-content h1{animation:title-reveal 1.8s cubic-bezier(.22,1,.36,1) .2s backwards}
  .hero-content .subtitle,.hero-content .sub-subtitle,.hero-content .event-date,.hero-content .venue,.hero-content .sessions{animation:copy-reveal 1.35s cubic-bezier(.22,1,.36,1) backwards}
  .hero-content .subtitle{animation-delay:.65s}
  .hero-content .sub-subtitle{animation-delay:.85s}
  .hero-content .event-date{animation-delay:1.05s}
  .hero-content .venue{animation-delay:1.2s}
  .hero-content .sessions{animation-delay:1.35s}
  .hero-content .venue:focus-within{animation:none}
}
@keyframes nav-reveal{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
@keyframes title-reveal{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes copy-reveal{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* 日時の右に受付開始と参加対象の案内を配置。 */
.reception{display:flex;align-items:center;gap:18px}
.reception>.reception-date{white-space:nowrap}
.reception-info{display:flex;flex-direction:column;gap:4px;text-align:left}
.reception-label{font-size:14px;letter-spacing:.09em}
.reception-info .ticket-note{font-size:14px;letter-spacing:.04em;line-height:1.4;width:auto;text-align:left}
@media(max-width:700px){.reception{gap:12px}.reception-label{font-size:14px}}

/* MV下部、受付帯の上にスクロールの目印。 */
.scroll-indicator{position:relative;z-index:6;flex-shrink:0;align-self:center;display:flex;flex-direction:column;align-items:center;gap:8px;height:48px;pointer-events:none;color:#d5dfec;font-family:Arial,sans-serif;font-size:14px;letter-spacing:.22em}
.scroll-indicator-line{position:relative;display:block;width:1px;height:27px;background:#d5dfec30;overflow:hidden}
.scroll-indicator-line:after{content:"";position:absolute;inset:0;background:#d5dfec;transform:translateY(-100%);animation:scroll-line-flow 2.6s ease-in-out infinite}
@keyframes scroll-line-flow{0%{transform:translateY(-100%)}65%,100%{transform:translateY(100%)}}
@media(prefers-reduced-motion:reduce){.scroll-indicator-line:after{animation:none;transform:none}}

/* イベントテーマ：静かな余白と、奥へ続く一本の光。 */
.theme-section{position:relative;isolation:isolate;overflow:hidden;background:#080f1d;padding:100px 6% 120px;color:#dbe3f0}
.theme-section:before{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(ellipse at 18% 62%,#28476245,transparent 48%);pointer-events:none}
.theme-section-inner{max-width:1200px;margin:0 auto}
.theme-section-header{display:flex;align-items:center;gap:22px;padding-bottom:24px;border-bottom:1px solid #b6cce32b}
.theme-section-en{font-family:Arial,sans-serif;font-size:14px;letter-spacing:.24em;color:#96adc7}
.theme-section-header h2{font-size:15px;font-weight:400;letter-spacing:.13em}
.theme-section-number{margin-left:auto;font-family:"noto-serif-jp",serif;font-size:18px;font-weight:300;color:#8da4be}
.theme-layout{display:grid;grid-template-columns:1fr 1.15fr;gap:80px;align-items:center;padding-top:78px}
.theme-art{position:relative;min-height:350px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:38px}
.theme-art-title{font-size:clamp(90px,10vw,142px);font-weight:400;letter-spacing:.16em;text-indent:.16em;line-height:1.3;background:linear-gradient(125deg,#edf3fa,#a1b7d0);background-clip:text;-webkit-background-clip:text;color:transparent}
.theme-art-line{position:absolute;left:50%;top:50%;width:135%;height:1px;transform:translate(-50%,-50%) rotate(-48deg);background:linear-gradient(90deg,transparent,#bbdbf640,transparent);z-index:-1}
.theme-art-caption{font-family:Arial,sans-serif;font-size:14px;letter-spacing:.22em;color:#91a8c1}
.theme-kicker{font-size:14px;letter-spacing:.16em;color:#99b2cf;margin-bottom:20px}
.theme-copy h3{font-size:clamp(20px,2.1vw,28px);line-height:1.9;font-weight:400;letter-spacing:.07em;margin:0 0 30px}
.theme-copy>p:not(.theme-kicker){font-size:14px;line-height:2.4;letter-spacing:.05em;color:#b7c6d8;margin-top:20px}
.theme-copy>p.theme-closing{margin-top:32px;padding-top:24px;border-top:1px solid #b6cce320;color:#e0e8f3;letter-spacing:.13em}
@media(max-width:900px){.theme-layout{gap:30px;grid-template-columns:.85fr 1.15fr}.theme-art-caption{font-size:14px;letter-spacing:.1em}}
@media(max-width:700px){.theme-section{padding:64px 24px 72px}.theme-section-header{gap:14px;padding-bottom:20px}.theme-section-header h2{font-size:14px}.theme-section-en{font-size:14px}.theme-layout{grid-template-columns:1fr;gap:30px;padding-top:24px}.theme-art{min-height:220px;gap:22px}.theme-art-title{font-size:100px}.theme-copy h3{font-size:21px}.theme-copy>p:not(.theme-kicker){font-size:14px}.theme-kicker{font-size:14px}}

/* ヘッダーをページ全体に追従。MV内の元の高さは維持する。 */
.masthead--fixed{position:fixed;inset:0 0 auto;z-index:100;background:transparent;transition:background-color .3s,box-shadow .3s}
.masthead--fixed.is-scrolled{background:#080f1deb;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 1px 0 #b6cce325}
.masthead-spacer{flex-shrink:0;width:100%}
#event{scroll-margin-top:calc(var(--header-height,120px) + 24px)}
@media(prefers-reduced-motion:reduce){.masthead--fixed{transition:none}}

/* イベントテーマのタイトル配置。 */
.theme-layout.theme-destination{display:flex;flex-direction:column;justify-content:center;gap:28px;min-height:580px;padding:70px 0;text-align:center}
.theme-destination-subtitle{font-size:clamp(18px,2.2vw,28px);letter-spacing:.12em;line-height:2}
.theme-destination-subtitle rt{font-size:14px;letter-spacing:.3em}
@media(max-width:700px){.theme-layout.theme-destination{min-height:380px;gap:20px}.theme-destination .theme-art-title{font-size:90px}.theme-destination-subtitle{font-size:17px;letter-spacing:.04em}}


/* MV右下に横長の会場写真。受付帯を基準に配置。 */
.hero-bottom{position:relative;z-index:6;flex-shrink:0;display:flex;justify-content:center;min-height:48px}
.hero-venue-photo{position:absolute;right:4.3%;bottom:18px;display:block;width:clamp(170px,15vw,260px);aspect-ratio:12/5;border:1px solid #d9e5f355;overflow:hidden;box-shadow:0 8px 24px #03091340}
.hero-venue-photo img{display:block;width:100%;height:100%;object-fit:cover}
.hero-venue-photo:focus-visible{outline:2px solid #e1ecf8;outline-offset:4px}
@media(max-width:700px){.hero-bottom{min-height:152px;justify-content:flex-start;align-items:flex-end;padding-left:24px}.hero-venue-photo{width:min(52vw,230px);right:24px;bottom:20px}}
.hero-venue-photo{border-radius:10px}
.venue-slides{display:flex;width:100%;height:100%;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none}
.venue-slides::-webkit-scrollbar{display:none}
.venue-slides img{flex:0 0 100%;min-width:100%;scroll-snap-align:start;scroll-snap-stop:always}
.venue-slider-controls{position:absolute;bottom:5px;right:6px;display:flex;align-items:center;gap:3px;background:#081324d9;border-radius:20px;color:white;font:14px Arial,sans-serif}
.venue-slider-controls button{width:28px;height:28px;border:0;background:none;color:inherit;font:22px Arial,sans-serif;cursor:pointer}
.venue-slider-controls button:focus-visible,.venue-slides:focus-visible{outline:2px solid white;outline-offset:-2px}
/* 会場写真の撤去後はSCROLLを中央に戻す。 */
.hero-bottom{min-height:48px;justify-content:center;align-items:stretch;padding-left:0}

/* タイトル登場後、間を空けて文字の表面を光が横切る。 */
.hero-content h1{position:relative}
.title-sheen{display:none}
@media(prefers-reduced-motion:no-preference){
  .title-sheen{display:block;position:absolute;inset:0;pointer-events:none;color:transparent;background-image:linear-gradient(110deg,transparent 38%,#f4f8ff55 45%,#ffffff 50%,#f4f8ff55 55%,transparent 62%);background-size:300% 100%;background-repeat:no-repeat;background-position:100% 0;-webkit-background-clip:text;background-clip:text;opacity:0;animation:title-sheen-pass 12s linear 3s infinite both}
}
@keyframes title-sheen-pass{0%{background-position:100% 0;opacity:0}4%{opacity:1}23%{opacity:1}27%,100%{background-position:0% 0;opacity:0}}

/* 動く星をMVの左右全体に表示。 */
.hero--portrait .stars{mask-image:none;-webkit-mask-image:none}

/* 透明な面の重なりと、奥へ続く境界光。写真そのものは変形しない。 */
.dimension-space{position:absolute;inset:0;z-index:1;pointer-events:none;overflow:hidden;mask-image:linear-gradient(90deg,#000 0%,#000 43%,transparent 70%);-webkit-mask-image:linear-gradient(90deg,#000 0%,#000 43%,transparent 70%)}
.dimension-veil{position:absolute;width:90%;height:58%;left:-16%;top:15%;border-radius:48% 52% 65% 35% / 68% 40% 60% 32%;transform:rotate(-24deg);background:linear-gradient(155deg,transparent 24%,#8bcce907 44%,#c1e6ff1a 49%,#b8a9ef0d 52%,transparent 64%);border-top:1px solid #bfdcff24;box-shadow:0 -14px 36px #a8d9ff08;opacity:.7}
.dimension-veil--back{left:-5%;top:24%;width:100%;height:64%;transform:rotate(-32deg);opacity:.45;background:linear-gradient(160deg,transparent 35%,#acc4ed0c 47%,#b7ddf31a 50%,transparent 58%);border-top-color:#cbd9f31a}
.dimension-seam{position:absolute;left:46%;top:-15%;width:15%;height:125%;transform:rotate(23deg);background:linear-gradient(90deg,transparent 30%,#afdaf409 46%,#d4eafa45 49.8%,#e7f3ff70 50%,#b9cdec0e 50.5%,transparent 65%);mask-image:linear-gradient(transparent,#000 30%,#000 65%,transparent);-webkit-mask-image:linear-gradient(transparent,#000 30%,#000 65%,transparent);opacity:.6}
.dimension-glow{position:absolute;inset:0;background:radial-gradient(ellipse at 28% 55%,#7fa9df16,transparent 44%),radial-gradient(ellipse at 45% 20%,#b8a4dc10,transparent 36%);filter:blur(16px)}
@media(prefers-reduced-motion:no-preference){
  .dimension-veil--front{animation:dimension-front 17s ease-in-out infinite alternate}
  .dimension-veil--back{animation:dimension-back 23s ease-in-out -12s infinite alternate}
  .dimension-seam{animation:dimension-boundary 19s ease-in-out infinite alternate}
  .dimension-glow{animation:dimension-breathe 19s ease-in-out infinite alternate}
}
@keyframes dimension-front{0%{transform:translate(-2%,3%) rotate(-26deg) skewX(-3deg) scaleY(.96);opacity:.45}45%{transform:translate(2%,-1%) rotate(-21deg) skewX(2deg) scaleY(1.04);opacity:.7}100%{transform:translate(5%,-4%) rotate(-18deg) skewX(-1deg) scaleY(1.08);opacity:.85}}
@keyframes dimension-back{0%{transform:translate(3%,-3%) rotate(-34deg) skewX(2deg) scaleY(1.06);opacity:.3}55%{transform:translate(-1%,1%) rotate(-28deg) skewX(-3deg) scaleY(.96);opacity:.6}100%{transform:translate(-4%,4%) rotate(-25deg) skewX(1deg) scaleY(1.03);opacity:.45}}
@keyframes dimension-boundary{0%{transform:translateX(-20px) rotate(25deg) skewX(-2deg);opacity:.3}50%{transform:translateX(4px) rotate(21deg) skewX(2deg);opacity:.65}100%{transform:translateX(28px) rotate(19deg) skewX(-1deg);opacity:.45}}
@keyframes dimension-breathe{from{opacity:.45}to{opacity:1}}
@media(max-width:700px){.dimension-space{mask-image:linear-gradient(180deg,transparent 25%,#000 58%);-webkit-mask-image:linear-gradient(180deg,transparent 25%,#000 58%)}.dimension-veil{top:45%}.dimension-veil--back{top:53%}.dimension-seam{opacity:.35}}

/* 初回は光の膜、輪の順に現れ、そのまま通常の揺らぎへつなぐ。 */
@media(prefers-reduced-motion:no-preference){
  .dimension-space{animation:curtain-arrive 2.8s cubic-bezier(.22,1,.36,1) .15s backwards}
  .portal--main{animation:portal-morph 20s ease-in-out infinite,portal-arrive 2.4s cubic-bezier(.22,1,.36,1) .4s backwards}
  .portal--outer{animation:portal-morph 26s ease-in-out infinite reverse,portal-arrive 2.8s cubic-bezier(.22,1,.36,1) .65s backwards}
  .portal--inner{animation:portal-morph 23s ease-in-out infinite,portal-arrive 2.5s cubic-bezier(.22,1,.36,1) .85s backwards}
  .portal-halo{animation:portal-morph 20s ease-in-out infinite,portal-arrive 3s cubic-bezier(.22,1,.36,1) .2s backwards}
  .portal-wave{animation-delay:2.8s}
}
@keyframes curtain-arrive{
  from{opacity:0;transform:translateY(20px) scale(1.025)}
  to{opacity:1;transform:translateY(0) scale(1)}
}
@keyframes portal-arrive{
  from{opacity:0;transform:translate(-50%,-50%) rotate(var(--portal-angle)) scale(.9)}
  to{transform:translate(-50%,-50%) rotate(var(--portal-angle)) scale(1)}
}

/* MVの登場に続き、受付帯を下端から引き上げる。 */
@media(prefers-reduced-motion:no-preference){
  .hero>.ticket-strip{animation:ticket-strip-arrive 1.2s cubic-bezier(.22,1,.36,1) 1.5s backwards}
}
@keyframes ticket-strip-arrive{
  from{opacity:0;transform:translateY(100%)}
  to{opacity:1;transform:translateY(0)}
}

/* 受付帯が現れてからSCROLLを表示し、先に浮いて見えないようにする。 */
@media(prefers-reduced-motion:no-preference){
  .hero-bottom .scroll-indicator{animation:scroll-indicator-arrive .7s ease 2.7s backwards}
  .scroll-indicator-line:after{animation-delay:2.7s}
}
@keyframes scroll-indicator-arrive{
  from{opacity:0;transform:translateY(6px)}
  to{opacity:1;transform:translateY(0)}
}
.ticket-arrow{flex-shrink:0;width:22px;height:22px}

/* テーマにもMVと同じ光のカーテンと円を重ねる。 */
.theme-section-inner{position:relative;z-index:4}
.theme-effects{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.theme-effects .dimension-space{mask-image:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent)}
.theme-effects .dimension-veil{left:0;top:12%}
.theme-effects .dimension-veil--back{left:12%;top:25%}
.theme-effects .portal,.theme-effects .portal-halo{left:50%;top:50%;width:min(70vw,760px);height:min(46vw,500px)}
.theme-effects .portal--main{background:transparent;border-top-color:#e9f2ff80;border-bottom-color:#dfeaff4d;box-shadow:0 0 24px #bddeff0c}
.theme-effects .portal--outer{width:min(73vw,790px);height:min(49vw,530px);opacity:.4}
.theme-effects .portal--inner{width:min(67vw,730px);height:min(43vw,470px);opacity:.4}
.theme-effects .portal-halo{width:min(76vw,820px);height:min(52vw,560px);opacity:.45}
@media(max-width:700px){.theme-effects .portal,.theme-effects .portal-halo{width:360px;height:290px}.theme-effects .portal--outer{width:382px;height:312px}.theme-effects .portal--inner{width:340px;height:270px}.theme-effects .dimension-veil{top:20%}.theme-effects .dimension-veil--back{top:30%}}
@media(prefers-reduced-motion:no-preference){
  .theme-motion-ready:not(.theme-in-view) .theme-effects *{animation-play-state:paused}
  .theme-motion-ready:not(.theme-entered) .theme-effects{opacity:0}
}
.theme-description{font-size:14px;line-height:2.1;letter-spacing:.07em;color:#c2cddd;max-width:100%;margin-top:-12px}
@media(max-width:700px){.theme-description{font-size:14px;max-width:330px;margin-top:-6px}}

/* テーマの文字組みをMVに合わせる。 */
.theme-layout.theme-destination{gap:0}
.theme-destination .theme-art-title{font-size:clamp(90px,10.25vw,147px);font-weight:500;line-height:1.36;letter-spacing:.18em;text-indent:.18em;margin:6px 0 0}
.theme-destination-subtitle{font-size:clamp(20px,1.9vw,28px);font-weight:400;letter-spacing:.12em;line-height:1.8;color:#e4eaf4}
.theme-destination-subtitle ruby{ruby-align:center}
.theme-destination-subtitle rt{font-family:var(--serif);font-size:14px;letter-spacing:.35em;text-indent:.35em;color:#becde3}
.theme-description{font-size:14px;letter-spacing:.07em;line-height:2.1;margin-top:0;color:#c2cddd}
@media(min-width:701px) and (max-width:1100px){.theme-destination-subtitle{font-size:21px;letter-spacing:.06em}.theme-description{font-size:14px;max-width:370px;margin-left:auto;margin-right:auto}}
@media(max-width:700px){.theme-destination .theme-art-title{font-size:97px;letter-spacing:.1em;text-indent:.1em;margin-top:15px}.theme-destination-subtitle{font-size:19px;letter-spacing:.08em}.theme-destination-subtitle rt{font-size:14px}.theme-description{font-size:14px;max-width:330px;line-height:2;margin-top:0}}
@media(max-width:360px){.theme-destination .theme-art-title{font-size:84px}}

/* テーマ説明の仮原稿。円はタイトルを囲む位置に保つ。 */
.theme-body{max-width:680px;margin:36px auto 0;padding-top:40px;border-top:1px solid #b6cce325;font-size:15px;line-height:2.4;letter-spacing:.06em;color:#c2cddd;text-align:left;overflow-wrap:anywhere}
.theme-body p+p{margin-top:28px}
.theme-effects .portal,.theme-effects .portal-halo{top:390px}
@media(max-width:700px){.theme-body{margin-top:20px;padding-top:28px;font-size:14px;line-height:2.2}.theme-body p+p{margin-top:22px}.theme-effects .portal,.theme-effects .portal-halo{top:254px}}

/* 遠景の星雲は静止させ、手前の光と星との奥行きを作る。 */
.theme-section:before{background:linear-gradient(180deg,#080f1d 0%,#080f1d22 18%,#080f1d22 70%,#080f1d 100%),radial-gradient(ellipse at 50% 45%,#080f1dcc 0%,#080f1d55 38%,transparent 70%),var(--sentaku-image-theme-nebula) center center/cover no-repeat;opacity:.7}

/* 開催情報：MVの濃紺とシルバーを引き継ぐ。 */
.event-detail{position:relative;padding:92px 6%;background:#080f1d;scroll-margin-top:calc(var(--header-height,120px) + 24px)}
.detail-inner{max-width:1100px;margin:auto}
.detail-heading{display:flex;align-items:center;gap:24px;border-top:1px solid #b6cce330;padding-top:26px;margin-bottom:60px}
.detail-heading>p{font:14px Arial,sans-serif;letter-spacing:.22em;color:#91abc7}
.detail-heading h2{font-size:20px;font-weight:400;letter-spacing:.16em}
.date-section{background:radial-gradient(ellipse at 15% 55%,#1e365238,transparent 60%),#080f1d}
.date-layout{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.detail-date{font-family:"noto-serif-jp",serif;font-weight:300}
.detail-year{font-size:26px;letter-spacing:.1em}
.detail-date>p{display:flex;align-items:center;gap:24px}
.detail-date time{font-size:clamp(60px,7vw,96px);line-height:1.5;letter-spacing:.02em;white-space:nowrap}
.detail-saturday{font-size:16px;letter-spacing:.1em;border-left:1px solid #b6cce350;padding-left:20px}
.detail-saturday>span{display:block;font-size:14px;letter-spacing:.05em;margin-top:8px}
.detail-session{display:flex;align-items:center;gap:30px;padding:24px 0}
.detail-session+.detail-session{border-top:1px solid #b6cce31a}
.detail-session h3{position:relative;font-size:14px;font-weight:400;border:1px solid #b6cce345;padding:8px 12px;white-space:nowrap}
.detail-session>p{display:flex;gap:34px}
.detail-session p>span{display:flex;flex-direction:column;gap:4px;font-size:14px;color:#aebfd3}
.detail-session strong{font-family:"noto-serif-jp",serif;font-size:30px;font-weight:300;color:#dbe3f0}
.detail-notes{list-style:none;padding:0;margin:40px 0 0;color:#aebfd3;font-size:14px;line-height:2;letter-spacing:.03em}
.detail-notes li{padding-left:1.3em;position:relative}.detail-notes li:before{content:"※";position:absolute;left:0}
.venue-section{padding-top:36px;padding-bottom:120px}
.venue-detail-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:start}
.venue-detail-photo{margin:0}.venue-detail-photo img{display:block;width:100%;height:auto;aspect-ratio:1.5;object-fit:cover;border-radius:10px;border:1px solid #b6cce330}
.venue-detail-photo figcaption{font:14px Arial,sans-serif;letter-spacing:.18em;color:#8da4be;margin-top:16px}
.venue-building{font-size:14px;letter-spacing:.1em}.venue-detail-copy h3{font-size:30px;font-weight:400;letter-spacing:.13em;margin:10px 0 24px}
.venue-detail-copy address{font-size:14px;font-style:normal;line-height:2;color:#b7c6d8}
.venue-access{margin:28px 0}.venue-access>div{display:grid;grid-template-columns:90px 1fr;gap:16px;padding:15px 0;border-top:1px solid #b6cce31a;font-size:14px;line-height:1.9}.venue-access>div:first-child{border-top:0}.venue-access dt{color:#e0e8f3}.venue-access dd{margin:0;color:#aebfd3}
.venue-detail-links{display:flex;flex-wrap:wrap;gap:18px 26px}.venue-detail-links a{display:inline-flex;align-items:center;gap:10px;color:#dbe3f0;font-size:14px;text-decoration:none;border-bottom:1px solid #b6cce350;padding-bottom:7px}.venue-detail-links a:hover{color:white;border-color:white}.venue-detail-links a:focus-visible{outline:1px solid white;outline-offset:5px}
@media(max-width:900px){.date-layout{gap:35px}.detail-session{gap:18px}.detail-session>p{gap:22px}.detail-session strong{font-size:26px}.venue-detail-layout{gap:32px}}
@media(max-width:700px){.event-detail{padding:60px 24px}.detail-heading{margin-bottom:34px;gap:18px}.detail-heading h2{font-size:18px}.date-layout,.venue-detail-layout{grid-template-columns:1fr;gap:32px}.detail-date{text-align:center}.detail-date>p{justify-content:center}.detail-date time{font-size:70px}.detail-year{font-size:22px}.detail-session{justify-content:center;gap:32px}.detail-session>p{gap:40px}.detail-notes{margin-top:26px;font-size:14px}.venue-section{padding-top:20px;padding-bottom:72px}.venue-detail-photo img{aspect-ratio:12/5}.venue-detail-copy h3{font-size:26px}}

/* 短い説明をテーマの文言に続けて表示。 */
.theme-destination .theme-body{max-width:680px;margin:24px auto 0;padding:0;border:0;text-align:center;font-size:14px;line-height:2.2;letter-spacing:.07em}
@media(max-width:700px){.theme-destination .theme-body{margin-top:20px;font-size:14px;max-width:330px}.theme-destination .theme-body br{display:none}}

/* 開催日時の注意書きの右に申し込み導線。 */
.date-footer{display:flex;justify-content:space-between;align-items:center;gap:32px;margin-top:40px}
.date-footer .detail-notes{margin:0}
.date-action{flex-shrink:0}
.date-action .ticket-button{min-width:260px;min-height:50px}
@media(max-width:900px){.date-footer{flex-direction:column;align-items:stretch;gap:28px}.date-action{align-self:center}}
@media(max-width:700px){.date-footer{margin-top:26px}.date-action{width:min(100%,340px)}.date-action .ticket-button{width:100%;min-width:0}}

/* 下方向で余白を縮め、上方向で元の高さへ。 */
.masthead--fixed{--header-expanded-padding:30px;padding-top:var(--header-expanded-padding);padding-bottom:var(--header-expanded-padding);transition:padding .3s ease,background-color .3s,box-shadow .3s}
.masthead--fixed.is-compact{padding-top:12px;padding-bottom:12px}
@media(max-width:700px){.masthead--fixed{--header-expanded-padding:24px}.masthead--fixed.is-compact{padding-top:10px;padding-bottom:10px}}
@media(prefers-reduced-motion:reduce){.masthead--fixed{transition:none}}

/* 左下で見切れる惑星。静かな遠景として、縁だけを覗かせる。 */
.mv-planet{position:absolute;z-index:-1;left:0;bottom:0;width:clamp(380px,48vw,760px);height:auto;transform:translate(-35%,78%);opacity:.65;filter:saturate(.65) brightness(.8);pointer-events:none}
@media(max-width:700px){.mv-planet{width:350px;transform:translate(-42%,82%);opacity:.5}}

/* 惑星は中心位置を保ったまま浮遊し、10分かけて一周する。 */
.mv-planet{--planet-x:-35%;--planet-y:78%}
@media(max-width:700px){.mv-planet{--planet-x:-42%;--planet-y:82%}}
@media(prefers-reduced-motion:no-preference){
  .mv-planet{animation:planet-float 13s ease-in-out infinite,planet-turn 600s linear infinite}
}
@keyframes planet-float{0%,100%{translate:0 0}50%{translate:0 -9px}}
@keyframes planet-turn{from{transform:translate(var(--planet-x),var(--planet-y)) rotate(0deg)}to{transform:translate(var(--planet-x),var(--planet-y)) rotate(360deg)}}

/* 画像の準備が整ってから、惑星を下から登場させる。 */
.planet-entrance{position:absolute;inset:0;z-index:-1;pointer-events:none;visibility:hidden}
.planet-entrance.is-ready{visibility:visible}
.planet-entrance .mv-planet{z-index:auto}
@media(prefers-reduced-motion:no-preference){
  .planet-entrance.is-ready{animation:planet-arrive 2.2s cubic-bezier(.22,1,.36,1) .5s backwards}
  .planet-entrance:not(.is-ready) .mv-planet{animation-play-state:paused}
}
@keyframes planet-arrive{from{opacity:0;transform:translateY(55px)}to{opacity:1;transform:translateY(0)}}

/* お申込の流れ：細い光の線で三つの手順をつなぐ。 */
.process-section{padding-top:28px;background:radial-gradient(ellipse at 85% 50%,#1e365225,transparent 65%),#080f1d}
.process-steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px}
.process-steps>li{position:relative;min-width:0;padding-top:0}

.process-number{display:block;font-family:"noto-serif-jp",serif;font-size:42px;font-weight:300;line-height:1.3;color:#9eb5cf;margin-bottom:24px}
.process-step-copy h3{font-size:18px;font-weight:400;letter-spacing:.06em;line-height:1.8;margin:0 0 16px}
.process-step-copy>p{font-size:14px;line-height:2.1;letter-spacing:.04em;color:#b7c6d8}
.process-step-copy>p.process-opening{margin-top:18px;font-size:14px;color:#dbe3f0}.process-opening time{display:block;font-family:"noto-serif-jp",serif;font-size:16px;margin-top:3px}
.process-options{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:18px 0 0}
.process-options li{padding:6px 10px;border:1px solid #b6cce330;font-size:14px;line-height:1.6;color:#dbe3f0}
.process-guidance{border-left:1px solid #b6cce350;padding:4px 0 4px 24px;margin-top:52px;max-width:750px}
.process-guidance h3{font-size:14px;font-weight:400;letter-spacing:.06em;margin:0 0 12px}
.process-guidance p{font-size:14px;line-height:2;color:#b7c6d8}.process-guidance .process-pending{font-size:14px;color:#91a8c1;margin-top:8px}
@media(max-width:900px){.process-steps{gap:24px}.process-step-copy h3{font-size:16px}}
@media(max-width:700px){.process-section{padding-top:20px}.process-steps{grid-template-columns:1fr;gap:30px}.process-steps>li{display:grid;grid-template-columns:48px 1fr;gap:20px;padding-top:20px}.process-number{font-size:32px;margin-bottom:0}.process-step-copy h3{font-size:17px;margin-bottom:10px}.process-guidance{margin-top:36px;padding-left:18px}.process-guidance h3{font-size:14px}}

/* 応募スケジュール：確定した日時と未定の締切を明確に表示。 */
.schedule-section{padding-top:28px}
.application-schedule{margin:0}
.schedule-row{display:grid;grid-template-columns:180px 1fr;align-items:center;gap:36px;padding:34px 0}

.schedule-row dt{font-size:15px;letter-spacing:.12em}
.schedule-row dd{margin:0;min-width:0}
.schedule-date{display:flex;align-items:center;flex-wrap:wrap;gap:24px;font-family:"noto-serif-jp",serif;font-weight:300;font-size:clamp(28px,3.5vw,44px);line-height:1.5;letter-spacing:.03em}
.schedule-weekday{font-size:14px;border-left:1px solid #b6cce345;padding-left:20px;letter-spacing:.08em}
.schedule-weekday>span{display:block;font-size:14px;margin-top:4px;color:#aebfd3}
.schedule-undecided{font-size:16px;letter-spacing:.07em;color:#aebfd3;line-height:2}
@media(max-width:700px){.schedule-section{padding-top:20px}.schedule-row{grid-template-columns:1fr;gap:16px;padding:26px 0}.schedule-row dt{font-size:14px}.schedule-date{gap:16px;font-size:28px}.schedule-weekday{font-size:14px;padding-left:14px}.schedule-undecided{font-size:14px}}

/* チケット価格：二つの料金を同じ文字組みで比較。 */
.ticket-section{padding-top:28px;background:radial-gradient(ellipse at 20% 45%,#1e36522b,transparent 60%),#080f1d}
.ticket-price-list{display:grid;grid-template-columns:1fr 1fr;margin:0}
.ticket-price-item{padding:40px 32px;text-align:center}
.ticket-price-item+div{border-left:1px solid #b6cce31a}
.ticket-price-item--member{background:linear-gradient(135deg,#b6cce30a,transparent)}
.ticket-price-item dt{font-size:15px;letter-spacing:.12em;color:#c2cddd}
.ticket-price-item dd{margin:18px 0 0;display:flex;align-items:baseline;justify-content:center;gap:10px}
.ticket-price-number{font-family:"noto-serif-jp",serif;font-weight:300;font-size:clamp(44px,5.5vw,68px);letter-spacing:.02em;line-height:1.4;font-variant-numeric:lining-nums tabular-nums}
.ticket-price-yen{font-size:16px}
.ticket-section-footer{display:flex;justify-content:space-between;align-items:center;gap:32px;margin-top:32px}
.ticket-section-footer .detail-notes{margin:0}
.ticket-section-action{flex-shrink:0}
.ticket-section-action .ticket-button{min-width:260px;min-height:50px}
@media(max-width:900px){.ticket-section-footer{flex-direction:column;align-items:stretch}.ticket-section-action{align-self:center}}
@media(max-width:700px){.ticket-section{padding-top:20px}.ticket-price-item{padding:28px 12px}.ticket-price-item dt{font-size:14px;letter-spacing:.04em}.ticket-price-number{font-size:36px}.ticket-price-yen{font-size:14px}.ticket-price-item dd{gap:5px}.ticket-section-action{width:min(100%,340px)}.ticket-section-action .ticket-button{width:100%;min-width:0}}

/* 下層からも迷わず移動できるナビゲーション。 */
.event-nav a{display:flex;flex-direction:column;align-items:center;gap:3px;color:inherit;text-decoration:none;transition:color .2s}
.event-nav a:hover{color:#fff}.event-nav a:focus-visible,.site-footer a:focus-visible{outline:1px solid #dbe3f0;outline-offset:6px}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
.message-section{padding-top:28px;background:radial-gradient(ellipse at 50% 60%,#243d5526,transparent 65%),#080f1d}
.message-pending{position:relative;isolation:isolate;text-align:center;padding:76px 20px 90px;overflow:hidden}
.message-orbit{position:absolute;z-index:-1;left:50%;top:50%;width:min(480px,90%);height:210px;transform:translate(-50%,-50%) rotate(-18deg);border:1px solid #b6cce31c;border-radius:50%;background:radial-gradient(ellipse,#7999bc09,transparent 70%)}
.message-coming{font-family:"noto-serif-jp",serif;font-weight:300;font-size:clamp(28px,3.2vw,40px);letter-spacing:.08em;margin-bottom:24px}
.message-pending>p:last-child{font-size:14px;line-height:2.3;letter-spacing:.08em;color:#aebfd3}
.notice-section{padding-top:28px;padding-bottom:100px}
.event-notices{list-style:none;padding:0;margin:0;max-width:960px}
.event-notices li{position:relative;padding-left:20px;margin-top:19px;color:#aebfd3;font-size:14px;line-height:2.15;letter-spacing:.035em;overflow-wrap:anywhere}
.event-notices li:first-child{margin-top:0}.event-notices li:before{content:"";position:absolute;left:0;top:.95em;width:4px;height:4px;border-radius:50%;background:#8fa4bd}
.site-footer{padding:48px 6% 26px;background:#060d18}
.footer-inner{max-width:1100px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:36px}
.footer-brand{display:block;width:210px;flex-shrink:0}.footer-brand img{display:block;width:100%;height:auto;filter:brightness(0) invert(1);opacity:.75}
.footer-links{display:flex;align-items:center;flex-wrap:wrap;gap:24px 30px}.footer-links a{font-size:14px;letter-spacing:.06em;color:#aebfd3;text-decoration:none}.footer-links a:hover{color:#fff}
.footer-links .page-top{display:flex;align-items:center;gap:12px;font:14px Arial,sans-serif;letter-spacing:.16em;padding:14px 0 14px 24px;border-left:1px solid #b6cce32b}
.footer-credit{max-width:1100px;margin:32px auto 0;font:14px Arial,sans-serif;letter-spacing:.08em;color:#7d90a8}
@media(max-width:700px){.event-nav a{align-items:flex-start}.message-section,.notice-section{padding-top:20px}.message-pending{padding:48px 12px 60px}.message-pending>p:last-child{font-size:14px}.event-notices li{font-size:14px;line-height:2}.notice-section{padding-bottom:64px}.site-footer{padding:36px 24px 24px}.footer-inner{align-items:flex-start;flex-direction:column;gap:28px}.footer-brand{width:180px}.footer-links{gap:16px 20px}.footer-links .page-top{padding-left:16px}.footer-credit{margin-top:28px}}

/* 右下から先頭へ戻れる、小さな追従リンク。 */
body>.page-top{position:fixed;right:max(24px,env(safe-area-inset-right));bottom:calc(24px + env(safe-area-inset-bottom));z-index:90;display:flex;flex-direction:column-reverse;align-items:center;justify-content:center;gap:8px;width:72px;min-height:72px;padding:12px 8px;background:#0b1829e8;border-radius:50%;box-shadow:0 4px 20px #0002;color:#c6d5e7;text-decoration:none;font:14px Arial,sans-serif;letter-spacing:.13em;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .3s,transform .3s,visibility .3s,background .2s}
body>.page-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
body>.page-top:hover{background:#1c3047;color:#fff}
body>.page-top:focus-visible{outline:1px solid #dbe3f0;outline-offset:4px}
.site-footer{padding-bottom:100px}
@media(max-width:700px){body>.page-top{right:16px;bottom:calc(16px + env(safe-area-inset-bottom));width:60px;min-height:60px;font-size:14px;gap:6px}.site-footer{padding-bottom:92px}}
@media(prefers-reduced-motion:reduce){body>.page-top{transition:none;transform:none}}

/* テーマの星雲を下層にもつなぎ、本文の背後は暗く保つ。 */
.event-detail{isolation:isolate;--nebula-position:50% 50%;--nebula-opacity:.65;--section-nebula:var(--sentaku-image-theme-nebula)}
.event-detail::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(180deg,#080f1d,transparent 24%,transparent 76%,#080f1d),radial-gradient(ellipse at 50% 50%,#080f1dcc,transparent 78%),var(--section-nebula) var(--nebula-position)/cover no-repeat;opacity:var(--nebula-opacity)}
.date-section{--nebula-position:25% 65%;--nebula-opacity:.45}
.venue-section{--nebula-position:80% 30%;--nebula-opacity:.32}
.process-section{--nebula-position:35% 75%;--nebula-opacity:.38}
.schedule-section{--nebula-position:85% 35%;--nebula-opacity:.45}
.ticket-section{--nebula-position:20% 65%;--nebula-opacity:.4}
.message-section{--nebula-position:60% 45%;--nebula-opacity:.6}
.notice-section{--nebula-position:85% 50%;--nebula-opacity:.2}
@media(max-width:700px){.event-detail::before{background-size:auto,auto,auto 100%;opacity:calc(var(--nebula-opacity) * .8)}}

.date-section{--section-nebula:var(--sentaku-image-nebula-date);--nebula-position:center;--nebula-opacity:.24}
.venue-section{--section-nebula:var(--sentaku-image-nebula-venue);--nebula-position:center;--nebula-opacity:.24}
.process-section{--section-nebula:var(--sentaku-image-nebula-process);--nebula-position:center;--nebula-opacity:.24}
.schedule-section{--section-nebula:var(--sentaku-image-nebula-schedule);--nebula-position:center;--nebula-opacity:.24}
.ticket-section{--section-nebula:var(--sentaku-image-nebula-ticket);--nebula-position:center;--nebula-opacity:.24}
.message-section{--section-nebula:var(--sentaku-image-nebula-message);--nebula-position:center;--nebula-opacity:.29}
.notice-section{--section-nebula:var(--sentaku-image-nebula-notice);--nebula-position:center;--nebula-opacity:.14}

/* 前回のメッセージを仮原稿として、読み進めやすい行幅で配置。 */
.message-copy{max-width:780px;margin:0 auto;color:#c2cddd}
.message-copy h3{margin:0 0 24px;font-size:clamp(21px,2.4vw,28px);font-weight:400;line-height:1.9;letter-spacing:.08em;color:#e0e8f3}
.message-copy p{font-size:14px;line-height:2.3;letter-spacing:.055em;margin:0 0 26px;overflow-wrap:anywhere}
.message-copy .message-lead{font-size:16px;line-height:2;letter-spacing:.06em;margin-bottom:36px;color:#d6e1ef}
.message-copy p:last-child{margin-bottom:0}
@media(max-width:700px){.message-copy p{font-size:14px;line-height:2.2;margin-bottom:22px}.message-copy .message-lead{font-size:14px;margin-bottom:28px}.message-copy br{display:none}}

.message-inline .message-copy{max-width:none;width:100%;margin:0}

/* 読みやすさの調整。補助的な英字ラベルだけ小さな文字組みを維持。 */
.nav-en{font-size:8px}
.detail-heading>p{font-size:10px}
.scroll-indicator{font-size:9px}
.venue-detail-photo figcaption{font-size:9px}
.detail-heading h2{font-size:28px;line-height:1.6}
.event-date,.event-date .weekday,.event-date .weekday>span,.reception-date,.reception-date small,.ticket-prices strong,.detail-date,.detail-session strong,.detail-session h3,.sessions,.session-label,.schedule-date,.process-number,.process-opening time,.process-options li,.ticket-price-number{font-weight:500}
.ticket-strip{flex-wrap:wrap;row-gap:18px}
.reception{flex-wrap:wrap}
.ticket-prices{flex-wrap:wrap;row-gap:12px}
body>.page-top{font-size:14px;width:88px;min-height:88px;letter-spacing:.02em}
@media(max-width:700px){.detail-heading h2{font-size:24px}.detail-heading{flex-wrap:wrap;gap:12px 20px}.sessions{flex-wrap:wrap;gap:12px 24px}.ticket-prices{justify-content:center}.ticket-prices p{white-space:normal}.ticket-price-item{padding:28px 8px}.ticket-price-item dt{letter-spacing:0}.event-date{gap:4px}.event-date .weekday{margin-left:5px;padding-left:10px}.event-date .year,.event-date .day{font-size:clamp(29px,8.5vw,44px)}.schedule-date{column-gap:12px;row-gap:12px}.schedule-weekday{padding-left:10px}.detail-session>p{gap:24px}.detail-session{gap:20px}.message-copy p{font-size:14px}body>.page-top{width:80px;min-height:80px}}

/* MVの開場・開演時間を強調し、枠にゆっくり光を巡らせる。 */
.hero-content .sessions{font-size:18px;gap:20px 28px;color:#d7e2f0}
.hero-content .sessions p{gap:12px;white-space:nowrap}
.hero-content .session-label{position:relative;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;min-width:56px;min-height:40px;padding:7px 11px;font-size:18px;line-height:1.4;letter-spacing:.05em;background:#14243a35}
.session-frame{position:absolute;inset:-1px;width:calc(100% + 2px);height:calc(100% + 2px);overflow:visible;pointer-events:none;fill:none}
.session-frame rect{stroke:#c4ddf3;stroke-width:1;stroke-dasharray:45 55;stroke-linecap:round;opacity:.4}
@media(prefers-reduced-motion:no-preference){.session-frame rect{animation:session-frame-travel 14s linear infinite}.sessions p:nth-child(2) .session-frame rect,.detail-session:nth-child(2) .session-frame rect{animation-delay:-7s}}
@keyframes session-frame-travel{from{stroke-dashoffset:0}to{stroke-dashoffset:-100}}
@media(max-width:700px){.hero-content .sessions{gap:14px;font-size:18px}.hero-content .sessions p{gap:10px}.hero-content .session-label{min-width:52px;min-height:38px;padding:6px 9px}.hero-content .sessions .divider{margin:0 7px}}
@media(max-width:360px){.hero-content .sessions{font-size:18px}.hero-content .sessions p{gap:8px}.hero-content .sessions .divider{margin:0 5px}}
@media(prefers-reduced-motion:reduce){.session-frame{display:none}}

@media(max-width:400px){.hero-content .sessions p{flex-wrap:wrap;justify-content:center;row-gap:8px;max-width:100%}}

/* PAGE TOPは14pxを維持して一行で中央に配置。 */
body>.page-top{width:96px;min-height:96px;text-align:center}
body>.page-top>span{display:block;white-space:nowrap;line-height:1.3}
body>.page-top>svg{flex-shrink:0}
@media(max-width:700px){body>.page-top{width:92px;min-height:92px}}

/* 先頭へ戻る操作は矢印だけでコンパクトに。 */
body>.page-top{width:56px;min-height:56px;padding:0;gap:0}
body>.page-top>svg{width:22px;height:22px}
@media(max-width:700px){body>.page-top{width:48px;min-height:48px}}

/* 受付情報・料金・申込ボタンを帯の右側へまとめる。 */
@media(min-width:901px){
  .hero>.ticket-strip{justify-content:flex-end;column-gap:24px}
  .ticket-strip .ticket-prices{position:relative;margin-left:0;padding-left:24px}
  .ticket-strip .ticket-prices::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:1px;height:25px;background:#8c9bb636}
  .ticket-strip .price-separator{flex-shrink:0;width:1px;height:25px;background:#8c9bb636}
  .ticket-strip .ticket-action{margin-left:0}
}

/* メッセージの見出し・本文を表示上の一行ずつ浮かび上がらせる。 */
.message-motion-line{display:block;position:relative}

/* 配信の予定と、会場で過ごす時間の魅力を穏やかに伝える帯。 */
.participation-banner{position:relative;isolation:isolate;overflow:hidden;margin-top:36px;padding:26px 32px;border-radius:0;background:linear-gradient(110deg,#233d574d,#16283d66);box-shadow:inset 3px 0 #a8c6e15c}
.participation-banner h3{font-size:18px;font-weight:500;letter-spacing:.08em;line-height:1.8;color:#e0e8f3;margin:0 0 10px}
.participation-banner p{font-size:14px;line-height:2;letter-spacing:.04em;margin:0}
.participation-stream{color:#aebfd3}
.participation-banner .participation-venue{margin-top:16px;color:#dce7f3;font-size:16px;font-weight:500}
@media(max-width:700px){.participation-banner{margin-top:28px;padding:22px 20px}.participation-banner h3{font-size:17px}.participation-banner .participation-venue{font-size:15px}}

.participation-banner::before{content:"";position:absolute;z-index:-1;pointer-events:none;top:0;bottom:0;left:0;width:45%;background:linear-gradient(105deg,transparent,#b6d7f50a 35%,#b6d7f512 50%,#b6d7f50a 65%,transparent);opacity:0;transform:translateX(-110%)}
@media(prefers-reduced-motion:no-preference){.participation-banner::before{animation:participation-glow 16s ease-in-out infinite}}
@keyframes participation-glow{0%,12%{opacity:0;transform:translateX(-110%)}22%{opacity:1}70%{opacity:1}82%,100%{opacity:0;transform:translateX(325%)}}

/* 600px以下ではナビをタップで開くコンパクトなヘッダーに。 */
.nav-toggle{display:none}
@media(max-width:600px){
  .masthead.has-mobile-menu{flex-direction:row;align-items:center;gap:20px;--header-expanded-padding:18px;padding-left:23px;padding-right:23px}
  .has-mobile-menu .nav-toggle{display:flex;position:relative;flex-direction:column;align-items:center;justify-content:center;gap:6px;flex-shrink:0;width:44px;height:44px;padding:0;background:transparent;border:0;color:#dbe3f0;cursor:pointer}
  .nav-toggle span{display:block;width:25px;height:1px;background:currentColor;transition:transform .3s,opacity .2s}
  .nav-toggle:focus-visible{outline:1px solid currentColor;outline-offset:3px}
  .is-menu-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .is-menu-open .nav-toggle span:nth-child(2){opacity:0}
  .is-menu-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .has-mobile-menu .event-nav{position:absolute;top:100%;left:0;right:0;width:100%;max-height:calc(100dvh - var(--header-height,80px));overflow-y:auto;overscroll-behavior:contain;padding:16px 23px 28px;background:#080f1df7;border-top:1px solid #a3b8d626;visibility:hidden;opacity:0;transform:translateY(-8px);transition:opacity .25s,transform .25s,visibility .25s}
  .has-mobile-menu.is-menu-open{background:#080f1df7}
  .has-mobile-menu.is-menu-open .event-nav{visibility:visible;opacity:1;transform:translateY(0)}
  .has-mobile-menu .event-nav ul{display:grid;grid-template-columns:1fr;gap:0}
  .has-mobile-menu .event-nav li{animation:none;white-space:normal;align-items:stretch}
  .has-mobile-menu .event-nav a{flex-direction:row;justify-content:flex-start;align-items:center;gap:20px;padding:13px 0;min-height:48px;font-size:15px}
  .has-mobile-menu .nav-en{width:78px;flex-shrink:0;font-size:10px}
}
@media(prefers-reduced-motion:reduce){.nav-toggle span,.has-mobile-menu .event-nav{transition:none}}

/* スマホでは人物を上部に収め、下端を本文背景へなじませる。 */
@media(max-width:600px){
  .hero--portrait .hero-portrait{inset:0 0 auto;height:clamp(520px,140vw,740px)}
  .hero--portrait .hero-portrait img{width:100%;height:100%;object-fit:cover;object-position:76% center}
  .hero--clouds .hero-portrait:after{background:linear-gradient(180deg,transparent 42%,#07132440 58%,#071324c7 78%,#071324 100%)}
  .hero--portrait .hero-content{margin-top:clamp(200px,50vw,450px)}
}

/* スマホの開催日時は年・日付をまとめ、各部の列と余白を揃える。 */
@media(max-width:600px){
  .date-layout{gap:24px}
  .detail-date{justify-self:start;width:max-content;max-width:100%;text-align:left}
  .detail-date .detail-year{display:block;font-size:20px;line-height:1.5;margin-bottom:8px}
  .detail-date>p{justify-content:flex-start;gap:20px}
  .detail-date time{font-size:clamp(56px,17vw,76px);line-height:1.2}
  .detail-saturday{padding-left:16px;font-size:15px}
  .detail-saturday>span{font-size:14px;margin-top:5px}
  .detail-sessions{width:100%;max-width:360px;justify-self:start}
  .detail-session{display:grid;grid-template-columns:48px minmax(0,1fr);gap:20px;padding:20px 0}
  .detail-session h3{margin:0;padding:9px 0;text-align:center}
  .detail-session>p{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .detail-session strong{font-size:clamp(25px,7.5vw,30px);line-height:1.5;white-space:nowrap}
}

/* 白い衣装に重なるスマホのタイトルも、明るい銀色と柔らかな影で読みやすく。 */
@media(max-width:600px){
  .hero--portrait .hero-content h1{background-image:linear-gradient(130deg,#f7faff 14%,#e5edf8 48%,#dce7f5 68%,#f4f8ff 90%);filter:drop-shadow(0 2px 2px #04102099) drop-shadow(0 5px 14px #041020b3)}
}

/* スマホの申込帯は上下に同じ余白を確保する。 */
@media(max-width:600px){
  .hero>.ticket-strip{padding-block:24px}
  .ticket-strip .reception-date{line-height:1.2}
  .ticket-strip .ticket-action{margin-bottom:0}
}

/* メニューは画面下端まで覆い、背面のページ位置を固定する。 */
html.menu-scroll-locked{overflow:hidden;overscroll-behavior:none;scroll-behavior:auto}
@media(max-width:600px){
  .has-mobile-menu.is-menu-open{background:#080f1d}
  .has-mobile-menu .event-nav{height:calc(100dvh - var(--header-height,80px));background:#080f1d;padding-bottom:max(28px,env(safe-area-inset-bottom))}
}

/* スマホでは受付帯を最初の画面の外へ送り、スクロールしてから見せる。 */
@media(max-width:600px){
  .hero--portrait{min-height:calc(100dvh + var(--ticket-strip-height,260px) + 1px)}
  .hero--portrait .hero-bottom{flex-grow:1;align-items:flex-end;padding-bottom:12px}
}