:root{
  --ink:#f4fbff; --ink-2:rgba(236,248,255,.78); --ink-3:rgba(226,244,255,.55);
  --gold:#f3d9a4; --line:rgba(255,255,255,.22); --deep:#02060d;
  --serif-ja:"Shippori Mincho B1","Hiragino Mincho ProN","Yu Mincho",serif;
  --serif:"Cormorant Garamond","Shippori Mincho B1",Georgia,serif;
  --sans:"Zen Kaku Gothic New","Hiragino Sans","Noto Sans JP",system-ui,sans-serif;
  --round:"M PLUS Rounded 1c","Hiragino Maru Gothic ProN",system-ui,sans-serif;
  --gut:clamp(20px,5vw,72px);
  color-scheme:dark;
}
:root[data-script="ko"]{--serif-ja:"Nanum Myeongjo","AppleMyungjo",serif;--sans:"Noto Sans KR","Apple SD Gothic Neo",system-ui,sans-serif}
:root[data-script="zh"]{--serif-ja:"Noto Serif TC","Songti TC",serif;--sans:"Noto Sans TC","PingFang TC",system-ui,sans-serif}
:root[data-script="latin"]{--serif-ja:"Cormorant Garamond",Georgia,serif;--sans:"Jost",system-ui,sans-serif}
:root[data-script="latin"] .scene h2{font-weight:500;letter-spacing:.01em;line-height:1.12;font-size:clamp(38px,6vw,84px)}
:root[data-script="latin"] .title .tag,:root[data-script="latin"] .finale .tag{font-style:italic;letter-spacing:.14em;text-indent:.14em}
:root[data-script="latin"] body{letter-spacing:.01em;line-height:1.75}
:root[data-script="latin"] .kicker{letter-spacing:.26em}
:root[data-script="latin"] .tank-scene h2{font-size:clamp(34px,4.4vw,70px)}
:root[data-script="ko"] .scene h2{font-weight:700;letter-spacing:.02em}
*{box-sizing:border-box}
html{background:var(--deep);-webkit-text-size-adjust:100%;scroll-behavior:auto;overflow-x:clip}
html:not(.free){overscroll-behavior:none}
html:not(.free) body{touch-action:pinch-zoom}
body{margin:0;color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.9;letter-spacing:.04em;background:transparent;overflow-x:clip;-webkit-font-smoothing:antialiased}
a{color:inherit}
:focus-visible{outline:2px solid #bff3ff;outline-offset:3px;border-radius:6px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* 舞台（背景に固定） */
#water,#life{position:fixed;inset:0;width:100vw;height:100vh;height:100lvh;display:block;pointer-events:none}
#water{z-index:0;background:#0d5f93}
#life{z-index:1}
.grain{position:fixed;inset:-50%;z-index:2;pointer-events:none;opacity:.13;mix-blend-mode:overlay;background-repeat:repeat;animation:grain 1.2s steps(6) infinite}
@keyframes grain{0%{transform:translate(0,0)}20%{transform:translate(-3%,2%)}40%{transform:translate(2%,-3%)}60%{transform:translate(-2%,-1%)}80%{transform:translate(3%,3%)}100%{transform:translate(0,0)}}
main,header.hud,footer{position:relative;z-index:3}

/* 開幕の幕 */
.curtain{position:fixed;inset:0;z-index:20;background:#000;display:grid;place-items:center;pointer-events:none;transition:opacity 1.6s cubic-bezier(.6,0,.2,1) 1.4s}
.curtain .presents{font-family:var(--serif);font-size:clamp(11px,1.1vw,14px);letter-spacing:.6em;text-indent:.6em;color:rgba(255,255,255,.75);opacity:0;transform:translateY(6px)}
.ready .curtain .presents{animation:presents 2.6s ease .2s forwards}
@keyframes presents{0%{opacity:0;transform:translateY(6px)}30%,62%{opacity:1;transform:none}100%{opacity:0;transform:translateY(-4px)}}
.ready .curtain{opacity:0}
.opened .curtain{display:none}
.letterbox{position:fixed;left:0;right:0;height:9vh;background:#000;z-index:19;pointer-events:none;transition:transform 1.8s cubic-bezier(.7,0,.2,1)}
.letterbox.t{top:0}.letterbox.b{bottom:0}
.dived .letterbox.t,.unveiled .letterbox.t{transform:translateY(-100%)}.dived .letterbox.b,.unveiled .letterbox.b{transform:translateY(100%)}

/* 上の帯・水深計 */
header.hud{position:fixed;top:0;left:0;right:0;z-index:21;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(14px + env(safe-area-inset-top)) var(--gut) 14px;opacity:0;transform:translateY(-8px);transition:opacity 1.2s ease .3s,transform 1.2s ease .3s}
.opened header.hud{opacity:1;transform:none}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--serif);font-size:20px;letter-spacing:.32em;text-transform:uppercase;font-weight:500}
.brand svg{width:26px;height:26px}
.hud nav{display:flex;align-items:center;gap:6px}
.pill{display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 15px;border-radius:999px;border:1px solid var(--line);background:rgba(4,20,36,.28);color:var(--ink);font:500 12.5px/1 var(--sans);letter-spacing:.12em;text-decoration:none;cursor:pointer;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:background .3s,border-color .3s}
.pill:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.4)}
.pill svg{width:16px;height:16px;flex:none}
.pill[aria-pressed="true"] .wave i{animation:eq 1s ease-in-out infinite}
.wave{display:inline-flex;gap:2px;align-items:center;height:14px}
.wave i{display:block;width:2px;height:5px;background:currentColor;border-radius:2px}
.wave i:nth-child(2){animation-delay:.2s!important;height:9px}.wave i:nth-child(3){animation-delay:.4s!important;height:6px}
@keyframes eq{0%,100%{transform:scaleY(.6)}50%{transform:scaleY(1.6)}}
.langs{position:relative}
.langs summary{list-style:none}.langs summary::-webkit-details-marker{display:none}
.langs .menu{position:absolute;right:0;top:46px;display:grid;min-width:150px;padding:8px;border-radius:16px;background:rgba(3,16,30,.86);border:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}
.langs .menu a{padding:8px 12px;border-radius:10px;text-decoration:none;font-size:14px}
.langs .menu a:hover,.langs .menu a[aria-current]{background:rgba(255,255,255,.1)}

.meter{position:fixed;right:18px;top:50%;z-index:14;transform:translateY(-50%);display:grid;justify-items:end;gap:10px;font-family:var(--serif);color:var(--ink-2);opacity:0;transition:opacity 1.2s ease .6s;pointer-events:none}
.opened .meter{opacity:1}
.meter .rail{width:1px;height:28vh;background:rgba(255,255,255,.18);position:relative;overflow:hidden}
.meter .rail i{position:absolute;inset:0;background:linear-gradient(#fff,rgba(255,255,255,.4));transform-origin:top;transform:scaleY(0)}
.meter .lab{font:500 10px/1 var(--sans);letter-spacing:.4em;writing-mode:vertical-rl;color:var(--ink-3)}
.meter .val{font-size:22px;letter-spacing:.06em;font-variant-numeric:tabular-nums;white-space:nowrap}
.meter .val small{font-size:12px;margin-left:3px;color:var(--ink-3)}

/* 章 */
.scene{position:relative;min-height:100vh;display:flex;align-items:center;padding:18vh var(--gut)}
.scene .copy{max-width:min(780px,86vw)}
.scene.right{justify-content:flex-end}.scene.center{justify-content:center;text-align:center}
.kicker{display:flex;align-items:center;gap:14px;font:500 11.5px/1 var(--sans);letter-spacing:.42em;color:var(--ink-2);text-transform:uppercase;margin:0 0 26px}
.kicker::before{content:"";width:44px;height:1px;background:currentColor;opacity:.6}
.center .kicker{justify-content:center}.center .kicker::after{content:"";width:44px;height:1px;background:currentColor;opacity:.6}
.scene h2{font-family:var(--serif-ja);font-weight:500;font-size:clamp(34px,5.4vw,76px);line-height:1.32;letter-spacing:.08em;margin:0 0 28px;text-shadow:0 2px 30px rgba(0,30,60,.35)}
.scene p{font-size:clamp(15px,1.25vw,17.5px);color:var(--ink-2);margin:0;max-width:34em;text-shadow:0 1px 16px rgba(0,20,40,.5)}
.center p{margin:0 auto}
.hint{display:inline-flex;align-items:center;gap:10px;margin-top:26px!important;font-size:13px!important;letter-spacing:.14em;color:var(--ink-3)!important}
.hint svg{width:18px;height:18px}

/* 字幕のような出かた */
.reveal-chars{word-break:keep-all;line-break:strict}
.reveal-chars .ln{display:inline-block;white-space:nowrap}
.reveal-chars .ch{display:inline-block;opacity:0;filter:blur(10px);transform:translateY(.35em);transition:opacity 1.1s ease,filter 1.3s ease,transform 1.3s cubic-bezier(.2,.7,.2,1);transition-delay:calc(var(--i) * 38ms)}
.in .reveal-chars .ch,.reveal-chars.in .ch{opacity:1;filter:none;transform:none}
.copy .kicker,.copy p,.copy .hint,.copy .actions{opacity:0;transform:translateY(14px);transition:opacity 1.4s ease .5s,transform 1.4s cubic-bezier(.2,.7,.2,1) .5s}
.copy p{transition-delay:.85s}.copy .hint,.copy .actions{transition-delay:1.15s}
.copy.in .kicker,.copy.in p,.copy.in .hint,.copy.in .actions{opacity:1;transform:none}
.reveal{opacity:0;transform:translateY(24px);transition:opacity 1.6s ease,transform 1.6s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* タイトル */
.title>div{width:100%}
.title{overflow:hidden;min-height:100vh;min-height:100svh;display:grid;grid-template-columns:minmax(0,1fr);place-items:center;text-align:center;padding:0 var(--gut)}
.title h1{margin:0;font-family:var(--serif);font-weight:300;font-size:clamp(42px,8.6vw,136px);line-height:.9;letter-spacing:.24em;text-indent:.24em;text-transform:uppercase;
  background:linear-gradient(100deg,#ffffff 20%,#d8fbff 38%,#ffffff 46%,#9fe9ff 60%,#ffffff 80%);background-size:300% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 6px 40px rgba(0,40,80,.35));opacity:0;letter-spacing:.6em;transition:opacity 2.4s ease 3.2s,letter-spacing 4.2s cubic-bezier(.2,.7,.1,1) 3s}
.ready .title h1{opacity:1;letter-spacing:.24em;animation:shimmer 9s linear infinite}
@keyframes shimmer{to{background-position:-300% 0}}
.title .by{margin:18px 0 0;font-family:var(--serif);font-style:italic;font-weight:300;font-size:clamp(15px,1.5vw,21px);letter-spacing:.22em;text-indent:.22em;color:var(--ink-2);opacity:0;transform:translateY(8px);transition:opacity 2s ease 4.2s,transform 2s ease 4.2s}
.title .by b{font-style:normal;font-weight:500;letter-spacing:.32em;text-transform:uppercase;font-size:.78em;margin-left:.5em;color:var(--ink)}
.ready .title .by{opacity:1;transform:none}
.title .tag{margin:34px 0 0;font-family:var(--serif-ja);font-size:clamp(16px,2vw,24px);letter-spacing:.38em;text-indent:.38em;color:var(--ink);opacity:0;transform:translateY(10px);transition:opacity 2s ease 5s,transform 2s ease 5s}
.ready .title .tag{opacity:1;transform:none}
.cue{position:absolute;left:50%;bottom:calc(11vh + 10px);transform:translateX(-50%);display:grid;justify-items:center;gap:12px;font:500 11px/1 var(--sans);letter-spacing:.5em;text-indent:.5em;color:var(--ink-2);opacity:0;transition:opacity 1.6s ease 6s}
.ready .cue{opacity:1}.dived .cue{opacity:0;transition-delay:0s}
.cue i{width:1px;height:54px;background:linear-gradient(transparent,#fff);animation:drop 2.4s cubic-bezier(.6,0,.3,1) infinite;transform-origin:top}
@keyframes drop{0%{transform:scaleY(0);opacity:1}60%{transform:scaleY(1);opacity:1}100%{transform:scaleY(1);opacity:0}}

/* iPhone */
.tank-scene{min-height:200vh;align-items:flex-start;padding-top:0;padding-bottom:0}
.tank-stage{position:sticky;top:0;height:100vh;height:100svh;width:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:clamp(24px,6vw,110px)}
.phone-wrap{display:grid;justify-items:center;gap:22px}
.phone{--pw:min(clamp(232px,23vw,320px),calc((100vh - 190px) * 9 / 19.5));--pw:min(clamp(232px,23vw,320px),calc((100svh - 190px) * 9 / 19.5));position:relative;width:var(--pw);aspect-ratio:9/19.5;border-radius:calc(var(--pw) * .16);padding:calc(var(--pw) * .035);background:linear-gradient(145deg,#2b3540,#0b1016 45%,#1c252e);box-shadow:0 0 0 1.5px rgba(255,255,255,.14) inset,0 40px 120px rgba(0,10,25,.55),0 0 80px rgba(120,220,255,.12);transition:transform 1.3s cubic-bezier(.6,0,.2,1)}
.phone .screen{position:relative;width:100%;height:100%;border-radius:calc(var(--pw) * .13);overflow:hidden;background:linear-gradient(170deg,#ffd6c0 0%,#c9b6ff 45%,#7fb5ff 100%)}
.phone .island{position:absolute;top:2.4%;left:50%;width:31%;height:3.6%;transform:translateX(-50%);background:#000;border-radius:99px;z-index:3}
.home{position:absolute;inset:0;padding:17% 7% 0;display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:min-content;gap:7% 6%;align-content:start;transition:opacity .5s ease}
.home .status{position:absolute;top:2.6%;left:9%;right:9%;display:flex;justify-content:space-between;font:600 calc(var(--pw) * .042)/1 var(--sans);color:#1b2433;letter-spacing:0}
.wg{position:relative;border-radius:calc(var(--pw) * .07);overflow:hidden;box-shadow:0 6px 18px rgba(30,40,90,.25)}
.wg canvas{display:block;width:100%;height:100%}
.wg.md{grid-column:span 4;aspect-ratio:2.14/1}
.wg.sm{grid-column:span 2;grid-row:span 2;aspect-ratio:1}
.wg .feed{position:absolute;right:6%;bottom:9%;display:grid;place-items:center;width:calc(var(--pw) * .1);height:calc(var(--pw) * .1);border:0;border-radius:50%;background:rgba(255,255,255,.82);color:#0f5d80;cursor:pointer;box-shadow:0 2px 8px rgba(0,30,60,.25);padding:0}
.wg .feed svg{width:56%;height:56%}
.wg .wclock{position:absolute;inset:0;display:grid;place-items:center;font:300 calc(var(--pw) * .15)/1 var(--round);color:#fff;letter-spacing:.02em;text-shadow:0 2px 14px rgba(0,30,60,.4);pointer-events:none}
.app{aspect-ratio:1;border-radius:24%;box-shadow:0 3px 10px rgba(30,40,90,.15)}
.app:nth-of-type(1){background:linear-gradient(#fff,#e9eef5)}.app:nth-of-type(2){background:linear-gradient(#ffcf6b,#ff9f43)}
.app:nth-of-type(3){background:linear-gradient(#7ee0a3,#2fb36b)}.app:nth-of-type(4){background:linear-gradient(#8fb8ff,#4d7cf5)}
.app:nth-of-type(5){background:linear-gradient(#ff9a9a,#ef5d6d)}.app:nth-of-type(6){background:linear-gradient(#fff,#dfe5ec)}
.dock{position:absolute;left:4.5%;right:4.5%;bottom:3%;height:12%;border-radius:calc(var(--pw) * .09);background:rgba(255,255,255,.35);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.standby{position:absolute;inset:0;opacity:0;pointer-events:none;transition:opacity .5s ease;background:#000}
.standby .wg{position:absolute;inset:0;border-radius:0;box-shadow:none}
.phone[data-mode="standby"]{transform:rotate(-90deg) scale(.62)}
.phone[data-mode="standby"] .home{opacity:0}
.phone[data-mode="standby"] .standby{opacity:1;pointer-events:auto}
.standby .rot{position:absolute;top:50%;left:50%;width:calc(var(--pw) * 19.5 / 9 - var(--pw) * .07);height:calc(var(--pw) * .93);transform:translate(-50%,-50%) rotate(90deg)}
.standby .wclock{font-size:calc(var(--pw) * .34)}
.modes{display:inline-flex;gap:4px;padding:4px;border-radius:999px;border:1px solid var(--line);background:rgba(4,20,36,.3);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.modes button{border:0;background:transparent;color:var(--ink-2);font:500 12.5px/1 var(--sans);letter-spacing:.12em;padding:11px 16px;border-radius:999px;cursor:pointer}
.modes button[aria-pressed="true"]{background:rgba(255,255,255,.9);color:#0b2c44}
.places{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px!important;padding:0;list-style:none}
.places li{font-size:12.5px;letter-spacing:.12em;padding:7px 13px;border-radius:999px;border:1px solid var(--line);color:var(--ink-2)}

/* 深海の時計 */
.clock-scene{min-height:150vh;flex-direction:column;justify-content:center;gap:5vh}
.bigclock{font:200 clamp(60px,11vw,170px)/1 var(--round);letter-spacing:.04em;color:#dff4ff;text-shadow:0 0 30px rgba(120,190,255,.55),0 0 90px rgba(80,150,255,.35);font-variant-numeric:tabular-nums}

/* 終幕 */
.finale{min-height:100vh;display:grid;place-items:center;text-align:center;padding:16vh var(--gut) 10vh}
.finale h2{margin:0;font-family:var(--serif);font-weight:300;font-size:clamp(52px,10vw,150px);letter-spacing:.24em;text-indent:.24em;text-transform:uppercase;line-height:1}
.finale .tag{margin:22px 0 0;font-family:var(--serif-ja);font-size:clamp(16px,1.9vw,22px);letter-spacing:.3em;text-indent:.3em;color:var(--ink-2)}
.store{display:inline-flex;align-items:center;gap:14px;margin-top:46px;height:62px;padding:0 30px 0 24px;border-radius:999px;background:#f4fbff;color:#06243a;text-decoration:none;font:600 16px/1 var(--sans);letter-spacing:.08em;box-shadow:0 0 0 1px rgba(255,255,255,.6),0 10px 50px rgba(120,200,255,.35);transition:transform .4s cubic-bezier(.2,.7,.2,1),box-shadow .4s}
.store:hover{transform:translateY(-2px);box-shadow:0 0 0 1px #fff,0 16px 70px rgba(140,210,255,.55)}
.store svg{width:24px;height:24px}
.promises{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 28px;margin:34px 0 0;padding:0;list-style:none;color:var(--ink-2);font-size:13.5px;letter-spacing:.14em}
.promises li{display:flex;align-items:center;gap:8px}.promises svg{width:15px;height:15px;color:var(--gold)}

.credits{padding:4vh var(--gut) 18vh;text-align:center;font-family:var(--serif)}
.credits .roll{display:grid;gap:9vh;max-width:760px;margin:0 auto}
.credits h3{margin:0 0 22px;font:500 11px/1 var(--sans);letter-spacing:.6em;text-indent:.6em;color:var(--gold);text-transform:uppercase}
.credits .role{font-size:clamp(15px,1.4vw,18px);letter-spacing:.18em;color:var(--ink-2);line-height:2.2}
.credits .cast{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:4px 26px;font-family:var(--serif-ja);font-size:15px;letter-spacing:.14em;color:var(--ink-2)}
.credits .cast span{display:block;line-height:2.3}
.credits .roll>*{opacity:0;transform:translateY(30px);transition:opacity 1.8s ease,transform 2s cubic-bezier(.2,.7,.2,1)}
.credits .roll>.in{opacity:1;transform:none}
.credits .fin{font-family:var(--serif);font-size:clamp(28px,3vw,40px);letter-spacing:.5em;text-indent:.5em;color:var(--ink)}

footer{padding:40px var(--gut) calc(40px + env(safe-area-inset-bottom));border-top:1px solid rgba(255,255,255,.08);display:flex;flex-wrap:wrap;gap:14px 28px;justify-content:space-between;align-items:center;font-size:13px;color:var(--ink-3);background:rgba(0,0,0,.35)}
footer nav{display:flex;flex-wrap:wrap;gap:6px 22px}
footer a{text-decoration:none;color:var(--ink-2)}footer a:hover{color:#fff}

@media (max-width:760px){
  body{font-size:15px}
  .meter{top:auto;bottom:calc(18px + env(safe-area-inset-bottom));right:16px;transform:none}
  .meter .rail,.meter .lab{display:none}
  .meter .val{font-size:15px}
  .hud .pill.links{display:none}
  .brand span{display:none}
  .scene{padding:16vh 22px}
  .scene h2{letter-spacing:.04em;font-size:clamp(26px,8.2vw,40px)}
  :root[data-script="latin"] .scene h2{font-size:clamp(28px,8.6vw,42px);letter-spacing:0}
  .tank-stage{grid-template-columns:1fr;align-content:center;gap:22px;padding:64px 0 16px}
  .tank-scene .copy h2{margin-bottom:14px}
  .tank-stage .copy{order:0}
  .phone{--pw:clamp(128px,calc((100vh - 430px) * 9 / 19.5),min(46vw,210px));--pw:clamp(128px,calc((100svh - 430px) * 9 / 19.5),min(46vw,210px))}
  .phone[data-mode="standby"]{transform:rotate(-90deg) scale(.82)}
  .tank-scene .copy p{font-size:14px}
  .places{display:none}
  .letterbox{height:6vh}
  .title h1{letter-spacing:.38em}
}
@media (prefers-reduced-motion:reduce){
  .grain{animation:none}
  .curtain{display:none}
  .title h1,.title .by,.title .tag,.cue,header.hud,.meter{transition:none!important;opacity:1!important;letter-spacing:.24em}
  .reveal,.copy .kicker,.copy p,.copy .hint,.copy .actions,.credits .roll>*{opacity:1;transform:none;transition:none}
}
@media (max-width:760px) and (max-height:740px){.tank-scene .copy p{display:none}}