:root {
  --bg: #07090f;
  --bg-elevated: #111622;
  --bg-soft: #171d2b;
  --line: rgba(255, 255, 255, 0.08);
  --text: #f4f1ea;
  --muted: #8b93a7;
  --disabled: #5a6275;
  --accent: #ff4fd8;
  --accent-2: #7cf7ff;
  --cheer-bg: #ffe56a;
  --cheer-text: #111111;
  --del: #7d8496;
  --version-bg: #1f8f4e;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "IBM Plex Sans KR", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top left, rgba(255, 79, 216, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(124, 247, 255, 0.12), transparent 24%),
    linear-gradient(180deg, #0b1020 0%, var(--bg) 40%, #05070c 100%);
}

button {
  font: inherit;
}

.app {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  min-height: 100vh;
}

.setlist-panel {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  padding: 28px 18px 32px;
  border-right: 1px solid var(--line);
  background: rgba(8, 11, 18, 0.88);
  backdrop-filter: blur(16px);
}

.setlist-header h1 {
  margin: 6px 0 10px;
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: -0.04em;
}

.eyebrow {
  margin: 0;
  color: var(--accent-2);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.setlist-note {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.setlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.setlist-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: center;
  width: 100%;
  padding: 12px 12px;
  border: 1px solid transparent;
  border-radius: 14px;
  background: transparent;
  color: inherit;
  text-align: left;
}

.setlist-item .num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--muted);
}

.setlist-item .name {
  font-size: 0.98rem;
  line-height: 1.3;
}

.setlist-item.is-available {
  cursor: pointer;
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.05);
}

.setlist-item.is-available:hover,
.setlist-item.is-available:focus-visible {
  outline: none;
  border-color: rgba(124, 247, 255, 0.35);
  background: rgba(124, 247, 255, 0.08);
}

.setlist-item.is-active {
  border-color: rgba(255, 79, 216, 0.55);
  background: linear-gradient(135deg, rgba(255, 79, 216, 0.18), rgba(124, 247, 255, 0.08));
  box-shadow: inset 0 0 0 1px rgba(255, 79, 216, 0.15);
}

.setlist-item.is-active .num,
.setlist-item.is-active .name {
  color: var(--text);
  font-weight: 700;
}

.setlist-item.is-disabled {
  color: var(--disabled);
  cursor: default;
  opacity: 0.55;
}

.setlist-item.is-disabled .num,
.setlist-item.is-disabled .name {
  color: var(--disabled);
}

.stage {
  min-width: 0;
  padding: 28px 28px 64px;
}

.mobile-strip {
  display: none;
}

.song-meta {
  margin-bottom: 18px;
}

.song-index {
  margin: 0 0 8px;
  color: var(--accent-2);
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

.song-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.05em;
  line-height: 1.05;
}

.song-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.cheer-card {
  max-width: 760px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(17, 22, 34, 0.92);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.cheer-text {
  padding: 28px 24px 36px;
  font-size: 1.08rem;
  line-height: 1.85;
  letter-spacing: -0.02em;
  text-align: center;
  white-space: pre-wrap;
}

.cheer-text .highlighted {
  display: inline;
  color: var(--cheer-text);
  background: var(--cheer-bg);
  font-weight: 700;
  font-size: 1.22em;
  line-height: 1.55;
  padding: 0.12em 0.42em;
  border-radius: 999px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  box-shadow: 0 0 0 1px rgba(255, 229, 106, 0.35);
}

.cheer-text .del {
  color: var(--del);
  text-decoration: line-through;
  opacity: 0.85;
}

.cheer-text .version {
  color: #f3fff5;
  background: var(--version-bg);
  font-weight: 700;
  padding: 0.08em 0.35em;
  border-radius: 8px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.cheer-text .error {
  color: #ffb4b4;
}

@media (max-width: 920px) {
  .app {
    grid-template-columns: 1fr;
  }

  .setlist-panel {
    display: none;
  }

  .stage {
    padding: 0 14px 48px;
  }

  .mobile-strip {
    display: block;
    position: sticky;
    top: 0;
    z-index: 20;
    margin: 0 -14px 18px;
    background: rgba(7, 9, 15, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }

  .strip-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 14px 16px;
    border: 0;
    background: transparent;
    color: var(--text);
    cursor: pointer;
  }

  .strip-label {
    flex: 0 0 auto;
    color: var(--accent-2);
    font-family: var(--font-display);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
  }

  .strip-current {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 700;
  }

  .strip-chevron {
    color: var(--muted);
    transition: transform 0.2s ease;
  }

  .mobile-strip.is-open .strip-chevron {
    transform: rotate(180deg);
  }

  .strip-panel {
    max-height: min(70vh, 560px);
    overflow: auto;
    padding: 0 12px 14px;
    border-top: 1px solid var(--line);
    background: rgba(10, 13, 22, 0.98);
  }

  .song-view {
    padding-top: 8px;
  }

  .cheer-text {
    padding: 22px 16px 30px;
    font-size: 1rem;
  }

  .cheer-text .highlighted {
    font-size: 1.28em;
  }
}