/* ============================================================
   TOKYO 2026 — night-train travelogue
   ============================================================ */
:root{
  --bg:#0b0e13;
  --bg2:#10141c;
  --card:#151a24;
  --ink:#e9edf3;
  --ink-dim:#9aa4b2;
  --jy:#86c440;          /* Yamanote green */
  --pink:#e8447a;
  --teal:#18b5a4;
  --gold:#f4b942;
  --red:#e0453a;
  --line:#232a37;
  --disp:'Zen Kaku Gothic New',sans-serif;
  --serif:'Shippori Mincho',serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--disp);font-weight:400;line-height:1.7;
  overflow-x:hidden;
  background-image:
    radial-gradient(1200px 600px at 85% -100px, rgba(134,196,64,.05), transparent 60%),
    radial-gradient(900px 500px at -100px 40%, rgba(232,68,122,.04), transparent 60%);
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

/* ---------- progress bar ---------- */
#progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:100;
  background:linear-gradient(90deg,var(--jy),#b8e986);
  box-shadow:0 0 12px rgba(134,196,64,.8)}

/* ---------- nav ---------- */
#nav{position:fixed;top:0;left:0;right:0;z-index:90;
  display:flex;justify-content:space-between;align-items:center;gap:1rem;
  padding:.65rem 1.2rem;
  background:rgba(11,14,19,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(134,196,64,.15)}
.brand{font-weight:900;font-size:1.05rem;letter-spacing:.14em;display:flex;align-items:center;gap:.5rem}
.brand em{font-style:normal;color:var(--jy)}
.brand-loop,.foot-loop{width:16px;height:16px;border-radius:50%;border:4px solid var(--jy);display:inline-block;flex:none}
.nav-days{display:flex;gap:.25rem;overflow-x:auto;scrollbar-width:none}
.nav-days::-webkit-scrollbar{display:none}
.nav-days a{font-weight:700;font-size:.78rem;letter-spacing:.08em;color:var(--ink-dim);
  padding:.3rem .6rem;border-radius:99px;border:1px solid transparent;transition:.25s;flex:none}
.nav-days a:hover{color:var(--ink)}
.nav-days a.on{color:#0b0e13;background:var(--jy);border-color:var(--jy)}
.nav-map{border:1px solid var(--line)!important}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;justify-content:center;overflow:hidden}
.hero-bg{position:absolute;inset:-6%;background-size:cover;background-position:center 30%;
  animation:heroZoom 26s ease-in-out infinite alternate;filter:saturate(1.15)}
@keyframes heroZoom{from{transform:scale(1)}to{transform:scale(1.12)}}
.hero-shade{position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,14,19,.75) 0%,rgba(11,14,19,.35) 40%,rgba(11,14,19,.55) 70%,var(--bg) 100%)}
.hero-kanji{position:absolute;top:50%;right:clamp(.5rem,4vw,4rem);transform:translateY(-50%);
  writing-mode:vertical-rl;font-family:var(--serif);font-weight:800;white-space:nowrap;
  font-size:clamp(1.6rem,3.4vw,2.9rem);letter-spacing:.3em;color:rgba(233,237,243,.85);
  filter:drop-shadow(0 0 14px rgba(24,181,164,.6));animation:fadeUp 1.4s .5s both}
.hero-inner{position:relative;text-align:center;padding:0 1.25rem;max-width:60rem}
.hero-kicker{font-size:.8rem;letter-spacing:.42em;color:var(--jy);font-weight:700;animation:fadeUp 1s .15s both}
.hero h1{font-size:clamp(4.2rem,16vw,12.5rem);font-weight:900;line-height:.95;letter-spacing:.02em;
  text-shadow:0 8px 60px rgba(0,0,0,.65);animation:fadeUp 1s .3s both}
.hero-sub{margin-top:1rem;font-size:clamp(1rem,2.2vw,1.3rem);color:#d5dbe4;font-weight:500;animation:fadeUp 1s .55s both}
.hero-dates{margin-top:1.4rem;font-size:.78rem;letter-spacing:.3em;color:var(--ink-dim);font-weight:700;animation:fadeUp 1s .7s both}
@keyframes fadeUp{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
.hero-scroll{position:absolute;bottom:2rem;left:50%;transform:translateX(-50%);
  width:26px;height:44px;border:2px solid rgba(233,237,243,.5);border-radius:14px}
.hero-scroll span{position:absolute;top:7px;left:50%;width:4px;height:9px;margin-left:-2px;border-radius:2px;
  background:var(--jy);animation:wheel 1.8s infinite}
@keyframes wheel{0%{opacity:1;transform:translateY(0)}70%{opacity:0;transform:translateY(16px)}100%{opacity:0}}

/* ---------- stats ---------- */
.stats{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem 3rem;
  padding:3.2rem 1.5rem;border-block:1px solid var(--line);background:var(--bg2)}
.stat{text-align:center;min-width:8rem}
.stat b{display:block;font-size:clamp(1.9rem,4vw,2.8rem);font-weight:900;color:var(--jy);font-variant-numeric:tabular-nums}
.stat i{font-style:normal;font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-dim)}

/* ---------- section heads ---------- */
.sec-head{max-width:46rem;margin:0 auto;text-align:center;padding:5rem 1.25rem 1rem}
.sec-kicker{font-size:.75rem;letter-spacing:.4em;font-weight:700;color:var(--jy)}
.sec-head h2{font-size:clamp(1.9rem,4.5vw,3rem);font-weight:900;margin:.4rem 0 .6rem}
.sec-sub{color:var(--ink-dim)}

/* ---------- map ---------- */
.mapsec{padding-bottom:4rem}
.map-wrap{max-width:60rem;margin:1.5rem auto 0;padding:0 1rem}
#tokyomap{width:100%;height:auto;display:block}
.m-loop{fill:none;stroke:var(--jy);stroke-width:9}
.m-loop-under{fill:none;stroke:rgba(134,196,64,.18);stroke-width:20}
.m-train{fill:#d9f2b8;filter:drop-shadow(0 0 6px rgba(134,196,64,.9))}
.m-spur{fill:none;stroke-width:6;stroke-linecap:round;opacity:.9}
.m-spur-dim{stroke-dasharray:2 10;opacity:.65}
.m-bridge{fill:#7de8db;font-size:12px;font-weight:700;letter-spacing:.2em}
.m-water{fill:rgba(125,232,219,.4);font-size:13px;letter-spacing:.35em;text-anchor:middle;font-weight:700}
.m-dim circle{fill:#39424f}
.m-dim text{fill:#5b6572;font-size:12px;font-weight:500}
.m-st circle{fill:#0b0e13;stroke:var(--c);stroke-width:5;transition:.25s;
  filter:drop-shadow(0 0 7px var(--c))}
.m-st text{fill:var(--ink-dim);font-size:12.5px;font-weight:700;letter-spacing:.06em;transition:.25s}
.m-st .m-kanji{fill:var(--ink);font-size:19px;font-weight:900;letter-spacing:.1em}
.m-st:hover circle{stroke-width:8;filter:drop-shadow(0 0 14px var(--c))}
.m-st:hover text{fill:var(--ink)}
.map-legend{display:flex;flex-wrap:wrap;gap:.6rem 1.6rem;justify-content:center;margin-top:1.2rem;
  font-size:.78rem;color:var(--ink-dim);font-weight:500}
.map-legend i{display:inline-block;width:20px;height:5px;border-radius:3px;margin-right:.45rem;vertical-align:middle}

/* ---------- chapters / station signs ---------- */
.chapter{padding:4.5rem 0 2rem;max-width:74rem;margin:0 auto}
.ssign{position:relative;margin:0 1.25rem 2.2rem;padding:1.6rem 1.8rem 1.8rem;
  background:linear-gradient(180deg,var(--card),#11151e);
  border:1px solid var(--line);border-radius:14px;overflow:hidden;
  box-shadow:0 18px 50px rgba(0,0,0,.35)}
.ssign-bar{position:absolute;top:0;left:0;right:0;height:7px;
  background:linear-gradient(90deg,var(--acc),transparent 85%)}
.ssign-meta{display:flex;justify-content:space-between;font-size:.72rem;font-weight:700;
  letter-spacing:.3em;color:var(--acc);margin-bottom:.5rem}
.ssign h2{font-size:clamp(1.7rem,4vw,2.7rem);font-weight:900;line-height:1.15}
.ssign h2 small{display:block;font-family:var(--serif);font-weight:600;font-size:.45em;
  color:var(--ink-dim);letter-spacing:.3em;margin-top:.3rem}
.ssign p{margin-top:.9rem;max-width:56rem;color:#c6cdd8}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.1rem}
.chip{font-size:.74rem;font-weight:700;letter-spacing:.05em;padding:.32rem .75rem;border-radius:99px;
  border:1px solid var(--c);color:var(--ink);background:color-mix(in srgb,var(--c) 14%,transparent)}

.substation{margin-top:3rem}
.substop{display:flex;align-items:baseline;gap:.8rem;flex-wrap:wrap;
  margin:2.4rem 1.4rem .5rem;font-size:clamp(1.15rem,2.6vw,1.55rem);font-weight:900}
.substop span{font-family:var(--serif);font-weight:600;font-size:.72em;color:var(--acc,#86c440);
  border:1px solid color-mix(in srgb,var(--acc,#86c440) 45%,transparent);
  padding:.1rem .6rem;border-radius:6px;letter-spacing:.12em;white-space:nowrap}
.substop-p{margin:0 1.4rem 1rem;color:var(--ink-dim);max-width:52rem}

/* ---------- boarding pass ---------- */
.bpass{position:relative;margin:0 1.25rem 2.2rem;max-width:44rem;
  background:#f4f1ea;color:#191919;border-radius:14px;overflow:hidden;
  box-shadow:0 20px 50px rgba(0,0,0,.5)}
@media(min-width:48rem){.bpass{margin-inline:auto}}
.bpass::before{content:"";position:absolute;left:0;right:0;top:0;height:8px;
  background:repeating-linear-gradient(90deg,var(--jy) 0 26px,#1c2b17 26px 52px)}
.bpass-head{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  padding:1.1rem 1.4rem .4rem;font-size:.68rem;font-weight:700;letter-spacing:.22em;color:#6b6b60}
.bpass-route{display:flex;align-items:center;gap:.6rem;padding:.5rem 1.4rem .9rem}
.bp-apt{text-align:center}
.bp-apt b{font-size:clamp(1.7rem,5vw,2.6rem);font-weight:900;letter-spacing:.04em;line-height:1}
.bp-apt i{display:block;font-style:normal;font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:#6b6b60}
.bp-line{flex:1;position:relative;height:2px;
  background:repeating-linear-gradient(90deg,#9a9a8e 0 8px,transparent 8px 15px)}
.bp-plane{position:absolute;top:50%;left:50%;transform:translate(-50%,-55%);font-size:1.05rem;background:#f4f1ea;padding:0 .35rem}
.bpass-foot{display:flex;justify-content:space-between;gap:.6rem;flex-wrap:wrap;
  border-top:2px dashed #c9c5b8;padding:.7rem 1.4rem;
  font-size:.66rem;font-weight:700;letter-spacing:.16em;color:#6b6b60}
.bpass-code{height:34px;margin:.2rem 1.4rem 1.1rem;border-radius:3px;
  background:repeating-linear-gradient(90deg,#191919 0 2px,transparent 2px 5px,#191919 5px 6px,transparent 6px 11px,#191919 11px 14px,transparent 14px 16px)}

/* ---------- galleries ---------- */
.gallery{display:flex;flex-wrap:wrap;gap:6px;padding:0 1.25rem;margin-top:1.2rem}
.gi{position:relative;overflow:hidden;border-radius:8px;cursor:zoom-in;
  flex-grow:calc(var(--ar)*100);flex-basis:calc(var(--ar)*13rem);min-height:120px;background:#1a2029}
.gi img{width:100%;height:100%;object-fit:cover;aspect-ratio:var(--ar);
  transition:transform .5s ease,filter .5s;filter:saturate(1.02)}
.gi:hover img{transform:scale(1.05)}
.gi::after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);border-radius:8px;pointer-events:none}
.gi-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none}
.gi-play::before{content:"";width:52px;height:52px;border-radius:50%;
  background:rgba(10,12,16,.55) center/45% no-repeat;backdrop-filter:blur(3px);
  border:2px solid rgba(255,255,255,.75);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M8 5v14l11-7z'/%3E%3C/svg%3E")}
.gi-dur{position:absolute;right:8px;bottom:8px;font-size:.68rem;font-weight:700;letter-spacing:.06em;
  background:rgba(8,10,14,.72);padding:.14rem .5rem;border-radius:99px;color:#fff;pointer-events:none}

/* ---------- teamLab immersive ---------- */
.tlab{position:relative;margin-top:4rem;padding:5rem 0 3.5rem;overflow:hidden;
  background:#05060a;border-block:1px solid #14202b}
.tlab-blobs i{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;animation:blob 18s ease-in-out infinite alternate}
.tlab-blobs i:nth-child(1){width:44vw;height:44vw;background:#0e4a8f;top:-12%;left:-8%}
.tlab-blobs i:nth-child(2){width:36vw;height:36vw;background:#7a1f6e;bottom:0;right:-6%;animation-delay:-6s}
.tlab-blobs i:nth-child(3){width:26vw;height:26vw;background:#0e6e63;top:38%;left:36%;animation-delay:-11s}
.tlab-blobs i:nth-child(4){width:20vw;height:20vw;background:#a23a10;top:12%;right:22%;animation-delay:-15s;opacity:.35}
@keyframes blob{from{transform:translate(0,0) scale(1)}to{transform:translate(6vw,-5vh) scale(1.25)}}
.tlab-head{position:relative;max-width:52rem;margin:0 auto;text-align:center;padding:0 1.4rem}
.tlab-title{font-size:clamp(2.4rem,7vw,4.6rem);font-weight:900;letter-spacing:.02em;
  background:linear-gradient(90deg,#7de8db,#8ab4ff 45%,#f0a3ff);-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 26px rgba(125,177,255,.35))}
.tlab-sub{margin-top:1rem;color:#aeb9cc}
.tlab-sub b{color:#e6ecf7}
.tlab-feature{position:relative;display:grid;gap:6px;max-width:74rem;margin:2.4rem auto 0;padding:0 1.25rem;
  grid-template-columns:repeat(4,1fr);grid-auto-rows:170px}
.tf{position:relative;overflow:hidden;border-radius:10px;cursor:zoom-in}
.tf img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.tf:hover img{transform:scale(1.06)}
.tf span{position:absolute;left:0;right:0;bottom:0;padding:1.6rem .8rem .55rem;font-size:.72rem;font-weight:700;
  letter-spacing:.08em;color:#dfe7f2;background:linear-gradient(transparent,rgba(3,5,9,.85))}
.tf.big{grid-column:span 2;grid-row:span 2}
@media(max-width:44rem){.tlab-feature{grid-template-columns:repeat(2,1fr);grid-auto-rows:150px}}
.tlab .gallery{position:relative}

/* ---------- gundam ---------- */
.gundam{margin:4rem 0 0;padding:3rem 0 1rem;background:
  radial-gradient(700px 340px at 50% 0,rgba(224,69,58,.12),transparent 70%)}
.ride-home{margin:2rem 1.4rem 0;padding:1.1rem 1.3rem;border-left:3px solid #333a45;
  color:var(--ink-dim);background:var(--card);border-radius:0 10px 10px 0;max-width:50rem}
.ride-home b{color:var(--ink)}

/* ---------- footer ---------- */
.foot{text-align:center;padding:5.5rem 1.25rem 3.5rem;margin-top:4rem;
  border-top:1px solid var(--line);background:var(--bg2)}
.foot-kanji{font-family:var(--serif);font-weight:800;font-size:clamp(2rem,6vw,3.4rem);
  letter-spacing:.14em;filter:drop-shadow(0 0 16px rgba(134,196,64,.45))}
.foot p{margin-top:.7rem;color:var(--ink-dim)}
.foot-small{font-size:.78rem;letter-spacing:.1em;margin-top:1.6rem!important}
.foot-loop{width:11px;height:11px;border-width:3px;vertical-align:-1px;margin-right:.3rem}

/* ---------- lightbox ---------- */
#lb{position:fixed;inset:0;z-index:200;background:rgba(5,6,9,.94);backdrop-filter:blur(10px);
  display:flex;align-items:center;justify-content:center}
#lb[hidden]{display:none}
#lb-stage{max-width:min(94vw,1400px);max-height:86vh;display:flex;align-items:center;justify-content:center}
#lb-stage img,#lb-stage video{max-width:94vw;max-height:86vh;border-radius:10px;
  box-shadow:0 30px 90px rgba(0,0,0,.7)}
#lb-cap{position:absolute;bottom:1.2rem;left:50%;transform:translateX(-50%);
  font-size:.8rem;font-weight:700;letter-spacing:.14em;color:var(--ink-dim);
  background:rgba(11,14,19,.7);padding:.4rem 1rem;border-radius:99px;white-space:nowrap}
#lb button{position:absolute;z-index:2;background:rgba(21,26,36,.7);color:var(--ink);
  border:1px solid var(--line);border-radius:50%;cursor:pointer;font-family:inherit;
  transition:.2s;display:flex;align-items:center;justify-content:center}
#lb button:hover{background:var(--jy);color:#0b0e13;border-color:var(--jy)}
#lb-close{top:1rem;right:1rem;width:46px;height:46px;font-size:1.1rem}
#lb-prev,#lb-next{top:50%;transform:translateY(-50%);width:54px;height:54px;font-size:2rem;padding-bottom:6px}
#lb-prev{left:1rem}
#lb-next{right:1rem}
@media(max-width:44rem){
  #lb-prev,#lb-next{top:auto;bottom:4rem;transform:none;width:46px;height:46px}
  #lb-prev{left:22%}#lb-next{right:22%}
  #lb-cap{bottom:.8rem}
}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s ease,transform .9s ease}
.reveal.in{opacity:1;transform:none}
html.flat{scroll-behavior:auto}
html.flat *,html.flat *::before,html.flat *::after{animation:none!important;transition:none!important}
html.flat .reveal{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}