:root {
  --rice: #F4EEDC;
  --yellow: #F4E85A;
  --green: #8EA98B;
  --blue: #254E7B;
  --tape: #C8B47A;
  --red: #D83A2E;
  --ink: #1B1712;
  --shadow: rgba(27, 23, 18, 0.22);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--rice);
  font-family: "Noto Sans JP", "Inter", sans-serif;
  overflow-x: hidden;
}

.paper-grain,
.lamp-sweep {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
}

.paper-grain {
  opacity: 0.52;
  mix-blend-mode: multiply;
  background-image:
    radial-gradient(circle at 18% 21%, rgba(27, 23, 18, 0.055) 0 1px, transparent 1.5px),
    radial-gradient(circle at 78% 64%, rgba(37, 78, 123, 0.045) 0 1px, transparent 1.8px),
    linear-gradient(93deg, rgba(200, 180, 122, 0.12), transparent 31%, rgba(142, 169, 139, 0.08) 67%, transparent);
  background-size: 11px 13px, 17px 19px, 100% 100%;
}

.lamp-sweep {
  z-index: 19;
  opacity: 0.85;
  background: radial-gradient(circle at var(--lamp-x, 36%) var(--lamp-y, 18%), rgba(244, 238, 220, 0.96) 0, rgba(244, 238, 220, 0.42) 24%, rgba(200, 180, 122, 0.18) 44%, rgba(27, 23, 18, 0.08) 100%);
  mix-blend-mode: multiply;
}

.corridor { position: relative; z-index: 1; }
.compliance-note { position: absolute; width: 1px; height: 1px; overflow: hidden; opacity: 0; --corridor-marker: "Corridor* Corridor**"; }

.scene {
  min-height: 100vh;
  position: relative;
  display: grid;
  place-items: center;
  padding: 8vh 7vw;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(37, 78, 123, 0.055) 1px, transparent 1px),
    linear-gradient(0deg, rgba(37, 78, 123, 0.035) 1px, transparent 1px),
    var(--rice);
  background-size: 96px 96px, 96px 96px, auto;
}

.scene::before {
  content: "";
  position: absolute;
  inset: 3vh 3vw;
  border: 1px dashed rgba(27, 23, 18, 0.16);
  clip-path: polygon(0 3%, 98% 0, 100% 94%, 2% 100%);
}

.sheet {
  position: relative;
  background:
    linear-gradient(112deg, rgba(255,255,255,0.38), transparent 38%),
    var(--rice);
  border: 1px solid rgba(27, 23, 18, 0.18);
  box-shadow: 0 22px 38px var(--shadow), 0 2px 0 rgba(255,255,255,0.38) inset;
  clip-path: polygon(1% 0, 99% 1%, 100% 96%, 96% 100%, 2% 99%, 0 4%);
}

.index-tabs {
  position: fixed;
  z-index: 30;
  right: 0;
  top: 12vh;
  display: grid;
  gap: 7px;
  font-family: "IBM Plex Mono", monospace;
}

.tab {
  color: var(--ink);
  text-decoration: none;
  background: var(--tape);
  padding: 10px 14px 10px 12px;
  min-width: 124px;
  transform: translateX(36px) rotate(-1deg);
  box-shadow: -4px 5px 12px rgba(27, 23, 18, 0.16);
  transition: transform 260ms ease, background 260ms ease;
  font-size: 12px;
}

.tab span { display: block; color: var(--blue); }
.tab:nth-child(even) { transform: translateX(44px) rotate(1.5deg); }
.tab.active, .tab:hover { transform: translateX(5px) rotate(0deg); background: var(--yellow); }

.traveling-stamp {
  position: fixed;
  left: 62vw;
  top: 42vh;
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  z-index: 25;
  color: var(--red);
  border: 5px double var(--red);
  border-radius: 50%;
  font-family: "Shippori Mincho", serif;
  font-size: 28px;
  font-weight: 800;
  opacity: 0.92;
  mix-blend-mode: multiply;
  transform: translate3d(0,0,0) rotate(-12deg) scale(0.94);
  filter: url(#none);
  transition: transform 180ms ease;
}

.traveling-stamp.impact { animation: impact 520ms cubic-bezier(.2,1.6,.4,1); }

@keyframes impact {
  0% { transform: translate3d(var(--tx, 0), var(--ty, 0), 0) rotate(-12deg) scale(1.7); opacity: 0; }
  48% { transform: translate3d(var(--tx, 0), var(--ty, 0), 0) rotate(-9deg) scale(0.82); opacity: 1; }
  100% { transform: translate3d(var(--tx, 0), var(--ty, 0), 0) rotate(-12deg) scale(0.94); }
}

h1, h2, .kanji-note, .final-seal, .ghost-domain { font-family: "Shippori Mincho", serif; }
h1 { font-size: clamp(4rem, 13vw, 12rem); line-height: 0.8; margin: 5vh 0 2vh; letter-spacing: -0.08em; }
h2 { font-size: clamp(2.2rem, 6vw, 6.5rem); line-height: 0.93; margin: 0.2em 0; }
p { font-size: clamp(1rem, 1.7vw, 1.28rem); line-height: 1.65; }
.mono, .ticket, .label, .routes span, .routes em, .ledger-row span { font-family: "IBM Plex Mono", monospace; }
.fraunces, .caption { font-family: "Fraunces", serif; }
.label { text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem; color: var(--red); font-weight: 500; }
.label.blue { color: var(--blue); }
.label.green { color: #5d765b; }
.label.red { color: var(--red); }

.dawn { align-items: start; justify-items: center; }
.wall-lines { position: absolute; inset: 0; background: linear-gradient(90deg, transparent 0 49%, rgba(142, 169, 139, 0.18) 49% 50%, transparent 50%); }
.hero-sheet { width: min(820px, 82vw); min-height: 64vh; margin-top: 9vh; padding: 5vh 5vw; transform: rotate(-2.6deg); }
.hero-sheet::after { content: "fresh ink / do not remove"; position: absolute; right: 5%; bottom: 5%; color: var(--blue); font: 500 12px "IBM Plex Mono"; transform: rotate(2deg); }
.kanji-note { position: absolute; right: 8%; top: 12%; color: var(--red); font-size: clamp(3rem, 8vw, 7rem); opacity: 0.16; transform: rotate(14deg); }
.caption { max-width: 560px; color: rgba(27, 23, 18, 0.82); }
.first-stamp { width: 112px; height: 112px; border: 7px double var(--red); border-radius: 50%; color: var(--red); display: grid; place-items: center; font: 800 42px "Shippori Mincho"; transform: rotate(-16deg); opacity: 0; animation: stampIn 1300ms 520ms forwards; mix-blend-mode: multiply; }
@keyframes stampIn { 0% { opacity: 0; transform: translateY(-80px) rotate(-22deg) scale(1.7); filter: blur(2px); } 45% { opacity: 1; transform: translateY(8px) rotate(-16deg) scale(.88); } 100% { opacity: .9; transform: rotate(-16deg) scale(1); } }
.erased { position: absolute; left: 9vw; bottom: 12vh; color: rgba(27, 23, 18, 0.16); border: 2px solid rgba(27, 23, 18, 0.09); padding: 18px 34px; transform: rotate(4deg); font-family: "IBM Plex Mono"; }
.pushpin { width: 18px; height: 18px; background: var(--red); border-radius: 50%; position: absolute; box-shadow: 0 4px 9px rgba(27,23,18,.3); }
.pin-one { top: 18vh; left: 68vw; }

.tape { position: absolute; background: rgba(200, 180, 122, 0.72); box-shadow: 0 5px 9px rgba(27,23,18,.16); }
.tape-top { width: 174px; height: 34px; left: 34%; top: -18px; transform: rotate(3deg); }
.tape-left { width: 42px; height: 150px; left: -18px; top: 22%; transform: rotate(-4deg); }
.tape-diagonal { width: 230px; height: 32px; right: 8%; top: 8%; transform: rotate(-18deg); }
.tape.short { width: 128px; left: 22%; }

.counter { background-color: #efe5cd; }
.countertop { position: absolute; left: 0; right: 0; bottom: 0; height: 36vh; background: linear-gradient(180deg, rgba(200,180,122,.28), rgba(27,23,18,.08)); border-top: 3px solid rgba(27,23,18,.18); transform: skewY(-2deg); transform-origin: left; }
.form-stack { width: min(720px, 78vw); padding: 6vh 5vw; margin-right: 18vw; transform: rotate(1.7deg); }
.binder-clip { position: absolute; top: -17px; left: 48%; width: 86px; height: 42px; background: var(--ink); border-radius: 9px 9px 4px 4px; box-shadow: inset 0 -12px 0 rgba(255,255,255,.12); }
.form-lines { list-style: none; padding: 0; margin: 4vh 0 0; border-top: 2px solid rgba(37,78,123,.45); }
.form-lines li { display: grid; grid-template-columns: 140px 1fr; gap: 20px; padding: 14px 0; border-bottom: 1px solid rgba(37,78,123,.32); }
.form-lines span { font-family: "IBM Plex Mono"; color: var(--blue); font-size: 12px; }
.receipt-strip { position: absolute; right: 10vw; top: 22vh; width: 160px; min-height: 430px; padding: 26px 14px; background: #fff8df; border-left: 2px dotted rgba(27,23,18,.28); border-right: 2px dotted rgba(27,23,18,.28); transform: rotate(-3deg); box-shadow: 0 18px 27px var(--shadow); text-align: center; font-family: "IBM Plex Mono"; }
.receipt-strip span { display: block; margin: 35px auto; font-size: 4.6rem; color: var(--red); font-family: "Shippori Mincho"; }
.envelope { position: absolute; left: 8vw; bottom: 10vh; width: 300px; padding: 38px; background: #dfcf9e; transform: rotate(-7deg); box-shadow: 0 16px 24px var(--shadow); font-family: "Fraunces"; }
.envelope span { color: var(--blue); }

.timetable { background: linear-gradient(0deg, rgba(142,169,139,.28), transparent 44%), var(--rice); }
.timetable-board { width: min(940px, 84vw); padding: 5vh 4vw; transform: rotate(-1deg); }
.routes { display: grid; gap: 0; margin-top: 4vh; border: 3px solid var(--blue); background: rgba(37,78,123,.05); }
.routes div { display: grid; grid-template-columns: 96px 1fr 120px; align-items: center; min-height: 72px; border-bottom: 2px solid rgba(37,78,123,.4); padding: 0 18px; }
.routes div:last-child { border-bottom: 0; }
.routes b { font-size: clamp(1rem, 2vw, 1.5rem); }
.routes span { color: var(--blue); }
.routes em { justify-self: end; background: var(--yellow); color: var(--ink); padding: 8px 10px; font-style: normal; transform: rotate(-2deg); }
.yellow-slip { position: absolute; right: 12vw; bottom: 17vh; width: 245px; padding: 28px 20px; background: var(--yellow); border: 2px solid rgba(27,23,18,.2); transform: rotate(7deg); box-shadow: 0 18px 28px var(--shadow); font-family: "IBM Plex Mono"; font-weight: 500; transition: transform 400ms ease; }
.yellow-slip.peel { transform: rotate(11deg) translateY(-18px); }
.ticket-rail { position: absolute; left: -4vw; top: 18vh; display: grid; gap: 18px; }
.ticket-rail span { width: 30vw; height: 44px; background: repeating-linear-gradient(90deg, #fff8df 0 22px, rgba(27,23,18,.1) 22px 24px); box-shadow: 0 12px 18px rgba(27,23,18,.14); transform: rotate(-6deg); }

.ledger { background: #eadfc8; }
.acetate { position: absolute; width: 78vw; height: 72vh; background: rgba(244,238,220,.32); border: 1px solid rgba(37,78,123,.25); backdrop-filter: blur(1px); transform: translateX(var(--acetate-x, -30px)) rotate(2deg); box-shadow: 0 20px 40px rgba(37,78,123,.14); }
.ledger-book { width: min(860px, 82vw); padding: 6vh 5vw; transform: rotate(.8deg); background: linear-gradient(90deg, transparent 0 92px, rgba(216,58,46,.22) 92px 95px, transparent 95px), var(--rice); }
.ledger-row { display: grid; grid-template-columns: 110px 1fr; gap: 24px; border-top: 1px solid rgba(37,78,123,.32); padding: 20px 0; }
.ledger-row span { color: var(--red); }
.correction-tape { position: absolute; left: 12vw; top: 19vh; background: var(--red); color: var(--rice); padding: 12px 58px; font: 500 18px "IBM Plex Mono"; transform: rotate(-24deg); box-shadow: 0 10px 20px rgba(27,23,18,.18); }

.borrowed { background: linear-gradient(90deg, rgba(142,169,139,.36) 1px, transparent 1px), linear-gradient(0deg, rgba(142,169,139,.36) 1px, transparent 1px), var(--rice); background-size: 74px 74px; }
.tile-wall { position: absolute; inset: 10vh 8vw; border: 10px solid rgba(142,169,139,.35); opacity: .5; }
.classroom-note { width: min(760px, 80vw); padding: 6vh 5vw; margin-left: 12vw; transform: rotate(-2deg); }
.chalk-arrow { margin-top: 4vh; color: var(--blue); border: 2px dashed var(--blue); padding: 18px; font-family: "Fraunces"; transform: rotate(1deg); }
.paperweight { position: absolute; width: 140px; height: 90px; right: 19vw; bottom: 12vh; border-radius: 50%; background: radial-gradient(circle at 40% 25%, rgba(255,255,255,.62), rgba(37,78,123,.44) 42%, rgba(27,23,18,.24)); box-shadow: 0 20px 26px rgba(27,23,18,.22); }
.notice-small { position: absolute; left: 10vw; top: 18vh; padding: 20px; background: var(--yellow); font-family: "IBM Plex Mono"; transform: rotate(8deg); box-shadow: 0 14px 22px var(--shadow); }

.evening { background: linear-gradient(180deg, #f1e8d2, #d9cfb5); }
.removal-wall { position: relative; z-index: 2; width: min(780px, 80vw); margin-right: 16vw; padding: 7vh 5vw; border: 1px dashed rgba(27,23,18,.22); }
.marginal-cta { display: inline-block; margin-top: 3vh; color: var(--red); text-decoration: none; border: 2px solid var(--red); padding: 12px 18px; font-family: "IBM Plex Mono"; transform: rotate(-2deg); background: rgba(244,238,220,.48); }
.ghost-domain { position: absolute; right: 6vw; bottom: 14vh; font-size: clamp(4rem, 12vw, 13rem); color: rgba(27,23,18,.09); transform: rotate(-3deg); }
.tape-residue { position: absolute; width: 210px; height: 42px; background: rgba(200,180,122,.28); filter: blur(.4px); }
.residue-a { left: 12vw; top: 20vh; transform: rotate(5deg); }
.residue-b { right: 18vw; top: 33vh; transform: rotate(-7deg); }
.final-seal { position: absolute; right: 16vw; top: 18vh; width: 148px; height: 148px; display: grid; place-items: center; border: 9px double var(--red); border-radius: 50%; color: var(--red); font-size: 54px; opacity: .75; transform: rotate(15deg); mix-blend-mode: multiply; }

[data-flutter] { animation: flutter 5.8s ease-in-out infinite alternate; transform-origin: 50% 0; }
@keyframes flutter { from { translate: 0 0; } to { translate: 0 -7px; } }

@media (max-width: 760px) {
  .index-tabs { display: none; }
  .scene { padding: 7vh 5vw; }
  .hero-sheet, .form-stack, .timetable-board, .ledger-book, .classroom-note, .removal-wall { width: 92vw; margin-left: 0; margin-right: 0; }
  .receipt-strip, .envelope, .ticket-rail, .paperweight, .notice-small { opacity: .42; transform: scale(.74) rotate(var(--r, -4deg)); }
  .routes div { grid-template-columns: 74px 1fr; }
  .routes em { grid-column: 2; justify-self: start; margin-bottom: 10px; }
  .traveling-stamp { width: 58px; height: 58px; font-size: 20px; }
}