:root {
  --bg-deep: #081321;
  --bg-mid: #12345a;
  --paper: #f7f4ee;
  --ink: #10243f;
  --ink-soft: #415b7b;
  --accent: #ff6b35;
  --panel: rgba(247, 244, 238, 0.93);
  --shadow: 0 14px 40px rgba(7, 15, 33, 0.28);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "IBM Plex Sans", sans-serif;
  color: var(--paper);
  background: var(--bg-deep);
}

.page-bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 15%, rgba(255, 107, 53, 0.2), transparent 32%),
    radial-gradient(circle at 70% 85%, rgba(30, 197, 148, 0.18), transparent 30%),
    linear-gradient(160deg, var(--bg-mid), var(--bg-deep));
  z-index: -1;
}

.layout {
  display: grid;
  grid-template-columns: minmax(160px, 18vw) 1fr;
  min-height: 100vh;
}

.story {
  padding: 2rem 2rem 30vh;
}

.intro {
  max-width: 36ch;
  margin-bottom: 1.5rem;
}

.kicker {
  letter-spacing: 0.11em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: #ffd5c7;
  margin-bottom: 0.8rem;
}

.intro h1 {
  font-family: "Sora", sans-serif;
  margin: 0 0 0.7rem;
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  line-height: 1.12;
}

.intro p,
.step p,
.outro p {
  color: #d9e6f3;
  line-height: 1.55;
}

.step {
  min-height: 82vh;
  max-width: 36ch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0.44;
  transform: translateY(10px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.step h2 {
  font-family: "Sora", sans-serif;
  margin: 0 0 0.6rem;
  font-size: 1.52rem;
}

.step.is-active {
  opacity: 1;
  transform: translateY(0);
}

.map-shell {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 1rem;
  isolation: isolate;
}

#map {
  width: 100%;
  height: 100%;
  border-radius: 18px;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}

.panel {
  position: absolute;
  right: 2rem;
  border-radius: 14px;
  background: var(--panel);
  color: var(--ink);
  box-shadow: var(--shadow);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.35);
  z-index: 1200;
}

.legend {
  top: 2rem;
  left: 2rem;
  right: auto;
  width: 230px;
  padding: 0.85rem 1rem;
}

.info {
  bottom: 2rem;
  left: 2rem;
  right: auto;
  width: min(360px, calc(100% - 2.5rem));
  max-height: 46vh;
  overflow: auto;
  padding: 1rem;
}

.search {
  top: 2rem;
  right: 2rem;
  left: auto;
  width: min(420px, calc(100% - 2.5rem));
  padding: 0.8rem 0.9rem;
}

.search-label {
  color: var(--ink);
  font-weight: 600;
  font-size: 0.92rem;
  display: block;
  margin-bottom: 0.45rem;
}

.search-row {
  display: flex;
  gap: 0.5rem;
}

#map-search-input {
  flex: 1;
  min-width: 0;
  border: 1px solid #c5d2e0;
  border-radius: 10px;
  padding: 0.5rem 0.65rem;
  font-size: 0.92rem;
}

#map-search-btn {
  border: 0;
  border-radius: 10px;
  padding: 0.5rem 0.8rem;
  background: #194f9b;
  color: #f8fbff;
  font-weight: 600;
  cursor: pointer;
}

#map-search-btn:hover {
  background: #143f7c;
}

.panel h3 {
  margin: 0;
  font-family: "Sora", sans-serif;
  font-size: 1.03rem;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.panel-toggle {
  border: 1px solid #c3cfdb;
  background: #ffffff;
  color: #1a3558;
  border-radius: 8px;
  width: 28px;
  height: 28px;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
}

.panel-toggle:hover {
  background: #eef3f9;
}

.panel-content {
  margin-top: 0.45rem;
}

.panel.is-collapsed .panel-content {
  display: none;
}

.panel p {
  margin: 0.4rem 0 0;
}

.muted {
  color: var(--ink-soft);
}

#status {
  position: absolute;
  left: 50%;
  top: 1.45rem;
  transform: translateX(-50%);
  padding: 0.58rem 0.95rem;
  border-radius: 999px;
  font-size: 0.88rem;
  background: rgba(8, 19, 33, 0.78);
  color: #edf7ff;
  pointer-events: none;
  opacity: 0;
  transition: opacity 170ms ease;
  z-index: 1300;
}

#status.visible {
  opacity: 1;
}

.info-list {
  margin: 0.7rem 0 0;
  padding-left: 1.05rem;
  max-height: 30vh;
  overflow: auto;
}

.info-list li {
  margin: 0.24rem 0;
  color: #1f3655;
}

.belongs-list {
  margin: 0.3rem 0 0.6rem;
  padding-left: 1.05rem;
}

.belongs-list li {
  margin: 0.2rem 0;
  color: #1f3655;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .map-shell {
    position: sticky;
    top: 0;
    height: 55vh;
    z-index: 3;
    padding: 0.7rem;
  }

  .story {
    padding: 1.1rem 1rem 16vh;
  }

  .step {
    min-height: 68vh;
  }

  .panel {
    left: 1rem;
    right: auto;
  }

  .search {
    right: auto;
    left: 1rem;
    top: 5.2rem;
    width: min(430px, calc(100% - 2rem));
  }

  .legend {
    top: 1rem;
    width: 200px;
  }

  .info {
    bottom: 1rem;
  }
}