:root {
  --paper: #f4efe4;
  --ink: #1a1714;
  --mute: #6a6258;
  --jrmsu: #0a2f6b;
  --svc: #1b4f9c;
  --abc: #e8b923;
  --dmc: #145c38;
  --safe-b: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
html { scroll-behavior: auto; }

body {
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(120% 80% at 50% 0%, #fff8ea 0%, var(--paper) 55%, #e8dfd0 100%);
  overflow-x: hidden;
}

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 20;
  background: #fff;
  color: var(--ink);
  padding: 8px 12px;
  border-radius: 8px;
}
.skip:focus { top: 12px; }

#wash {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(10,47,107,0.08), transparent 40%),
    linear-gradient(300deg, rgba(20,92,56,0.08), transparent 45%);
  mix-blend-mode: multiply;
}

#world {
  position: fixed;
  inset: 0;
  z-index: 1;
  perspective: 1100px;
  overflow: hidden;
  pointer-events: none;
}

#currents {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}

.current {
  fill: none;
  stroke-width: 1.15;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.c-jrmsu { stroke: var(--jrmsu); }
.c-svc { stroke: var(--svc); }
.c-abc { stroke: var(--abc); }
.c-dmc { stroke: var(--dmc); }

#rig {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  will-change: transform;
}

#field, #marks {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
}

.plate {
  position: absolute;
  left: 50%;
  top: 50%;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  will-change: transform;
  pointer-events: auto;
  cursor: grab;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(40, 28, 12, 0.18);
  touch-action: pan-y;
}

.plate:active { cursor: grabbing; }

.plate img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.12);
  pointer-events: none;
}

.plate::after {
  content: "";
  position: absolute;
  inset: 0;
  mix-blend-mode: multiply;
  opacity: 0.22;
  pointer-events: none;
}

.plate[data-school="jrmsu"]::after { background: linear-gradient(135deg, #0a2f6b, transparent 60%); }
.plate[data-school="svc"]::after { background: linear-gradient(135deg, #1b4f9c, transparent 60%); }
.plate[data-school="abc"]::after { background: linear-gradient(135deg, #e8b923, transparent 55%); }
.plate[data-school="dmc"]::after { background: linear-gradient(135deg, #145c38, transparent 60%); }

.mark {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 8px 18px rgba(26, 23, 20, 0.18);
  background: #fff;
  pointer-events: none;
  transform-style: preserve-3d;
  backface-visibility: hidden;
}

.mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#wake {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.45;
}

.hud {
  position: relative;
  z-index: 4;
  padding: 22px 20px 0;
  max-width: 920px;
}

.kicker {
  margin: 0 0 8px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 11px;
  color: var(--mute);
}

h1 {
  margin: 0;
  font-size: clamp(34px, 11vw, 92px);
  line-height: 0.86;
  letter-spacing: -0.045em;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.cut {
  display: block;
  background: linear-gradient(90deg, var(--ink) 12%, var(--jrmsu), var(--svc), var(--dmc), var(--abc));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 180% 100%;
}

.names {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0 0;
  margin: 0;
}

.names li {
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(26, 23, 20, 0.12);
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(8px);
}

.names li.is-hot { color: #fff; border-color: transparent; }
.names li[data-school="jrmsu"].is-hot { background: var(--jrmsu); }
.names li[data-school="svc"].is-hot { background: var(--svc); }
.names li[data-school="abc"].is-hot { background: var(--abc); color: #1a1a1a; }
.names li[data-school="dmc"].is-hot { background: var(--dmc); }

.hint {
  position: fixed;
  left: 20px;
  bottom: calc(28px + var(--safe-b));
  z-index: 4;
  margin: 0;
  font-size: 12px;
  color: var(--mute);
  letter-spacing: 0.04em;
  max-width: 42vw;
}

.portal {
  position: fixed;
  right: 12px;
  bottom: calc(16px + var(--safe-b));
  z-index: 6;
  width: min(68vw, 228px);
  height: 228px;
  display: grid;
  place-items: center;
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  isolation: isolate;
}

.portal span {
  position: relative;
  z-index: 2;
  font-weight: 800;
  letter-spacing: 0.06em;
  font-size: 13px;
  line-height: 1.15;
  max-width: 58%;
}

.portal small {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 22px;
  z-index: 2;
  font-size: 11px;
  color: var(--mute);
}

.iris {
  position: absolute;
  inset: 26%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, rgba(255,255,255,0.7), transparent 42%),
    conic-gradient(from 20deg, var(--jrmsu), var(--svc), var(--abc), var(--dmc), var(--jrmsu));
  background-size: cover;
  opacity: 0.22;
  z-index: 0;
  transition: background-image 0.35s ease, opacity 0.35s ease;
}

.ring {
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 2px solid transparent;
  pointer-events: none;
}

.r1 { border-color: color-mix(in srgb, var(--jrmsu) 70%, white); }
.r2 { inset: 12%; border-color: color-mix(in srgb, var(--svc) 65%, white); }
.r3 { inset: 6%; border-color: color-mix(in srgb, var(--abc) 80%, white); }
.r4 { inset: 0; border-color: color-mix(in srgb, var(--dmc) 65%, white); }

.portal.is-ready .ring { animation: spin 18s linear infinite; }
.portal.is-ready .r2 { animation-duration: 14s; animation-direction: reverse; }
.portal.is-ready .r3 { animation-duration: 22s; }
.portal.is-ready .r4 { animation-duration: 11s; animation-direction: reverse; }
.portal.is-ready .iris { animation: pulse 3.4s ease-in-out infinite; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse {
  50% { transform: scale(1.08); opacity: 0.34; }
}

#rail {
  height: 220vh;
  pointer-events: none;
}

@media (min-width: 760px) {
  .hud { padding: 36px 48px 0; }
  .hint { left: 48px; max-width: none; }
  .portal { right: 40px; width: 280px; height: 280px; }
}

@media (max-width: 430px) {
  .portal { width: 188px; height: 188px; right: 8px; }
  .portal span { font-size: 12px; letter-spacing: 0.04em; max-width: 62%; }
  .portal small { display: none; }
  .hint { max-width: 36vw; }
}

@media (prefers-reduced-motion: reduce) {
  .cut { color: var(--ink); background: none; }
  .portal.is-ready .ring,
  .portal.is-ready .iris { animation: none; }
  .plate { box-shadow: 0 8px 18px rgba(40, 28, 12, 0.12); }
}