/* ===================== FG TETRIS — Web Edition ===================== */
:root {
  --bg: #0b0f1a;
  --bg2: #131a2c;
  --panel: rgba(255, 255, 255, 0.05);
  --line: rgba(255, 255, 255, 0.12);
  --accent: #22d3ee;
  --accent2: #a855f7;
  --text: #e8eefc;
  --muted: #8a96b4;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  height: 100%;
  background: radial-gradient(1200px 800px at 70% -10%, #1c2542 0%, var(--bg) 55%);
}
body {
  height: 100%;
  background: transparent; /* let #bg-layer (negative z-index) show through */
  color: var(--text);
  font-family: 'Noto Sans KR', system-ui, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overflow: hidden;
}

/* Background image layer (behind everything) */
#bg-layer {
  position: fixed; inset: 0; z-index: -2;
  background-size: cover; background-position: center; background-repeat: no-repeat;
  transition: background-image .4s ease;
  filter: saturate(1.05);
}
#bg-layer::after {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(130% 100% at 50% 0%, rgba(8,11,20,0.10), rgba(8,11,20,0.40) 75%),
    linear-gradient(180deg, rgba(8,11,20,0.18), rgba(8,11,20,0.50));
  z-index: -1;
}

#app { height: 100%; display: flex; align-items: center; justify-content: center; padding: 16px; position: relative; z-index: 1; }

.screen { width: 100%; max-width: 980px; display: flex; align-items: center; justify-content: center; }
.hidden { display: none !important; }

/* ===================== Menu ===================== */
.menu-card {
  width: 100%; max-width: 460px;
  background: linear-gradient(160deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 34px 28px;
  text-align: center;
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
  backdrop-filter: blur(6px);
}

.logo {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: clamp(38px, 9vw, 56px);
  letter-spacing: 3px;
  line-height: 1;
  background: linear-gradient(92deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 20px rgba(34,211,238,0.35));
}
.logo span { display: inline-block; margin-left: 8px; }
.tagline { color: var(--muted); margin-top: 10px; font-size: 14px; }

.mode-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
  margin: 26px 0 16px;
}
.mode-btn {
  display: flex; flex-direction: column; gap: 4px; align-items: flex-start;
  padding: 16px 16px; border-radius: 14px; cursor: pointer;
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
  text-align: left;
}
.mode-btn:hover { transform: translateY(-2px); border-color: var(--accent); background: rgba(34,211,238,0.08); }
.mode-btn:active { transform: translateY(0); }
.m-title { font-family: 'Orbitron', sans-serif; font-weight: 700; font-size: 18px; letter-spacing: 1px; }
.m-sub { font-size: 12px; color: var(--muted); }
.mode-btn.easy .m-title { color: #22c55e; }
.mode-btn.hard .m-title { color: #ef4444; }
.mode-btn.training .m-title { color: #22d3ee; }
.mode-btn.multi .m-title { color: #facc15; }

.ghost-btn {
  width: 100%; padding: 13px; border-radius: 12px; cursor: pointer;
  background: transparent; border: 1px solid var(--line); color: var(--text);
  font-size: 15px; font-weight: 700; transition: background .12s, border-color .12s;
}
.ghost-btn:hover { background: var(--panel); border-color: var(--accent); }

.sound-row { display: flex; gap: 10px; margin-bottom: 12px; }
.sound-toggle {
  flex: 1; padding: 11px; border-radius: 11px; cursor: pointer; font-weight: 700; font-size: 14px;
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  transition: opacity .12s, border-color .12s;
}
.sound-toggle:hover { border-color: var(--accent); }
.sound-toggle.off { opacity: 0.45; }

.top-right { display: flex; gap: 8px; }

.controls-hint {
  margin-top: 22px; display: flex; flex-wrap: wrap; gap: 8px 14px; justify-content: center;
  font-size: 12px; color: var(--muted);
}
.controls-hint b { color: var(--text); font-family: 'Orbitron', sans-serif; }

/* ===================== Game ===================== */
#screen-game { flex-direction: column; gap: 10px; }
.game-top {
  width: 100%; max-width: 720px;
  display: flex; align-items: center; justify-content: space-between;
}
.top-btn {
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  padding: 8px 14px; border-radius: 10px; cursor: pointer; font-size: 14px; font-weight: 700;
}
.top-btn:hover { border-color: var(--accent); }
.mode-tag {
  font-family: 'Orbitron', sans-serif; letter-spacing: 2px; font-weight: 700;
  color: var(--accent); font-size: 15px;
}

.game-wrap { display: flex; gap: 26px; justify-content: center; align-items: flex-start; }

.player { display: flex; gap: 12px; align-items: flex-start; }
.board {
  background: rgba(6,9,16,0.66);
  border: 2px solid rgba(255,255,255,0.18);
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.55), inset 0 0 40px rgba(0,0,0,0.45);
  touch-action: none;
}

.side { display: flex; flex-direction: column; gap: 10px; min-width: 96px; }
.side.left { align-items: stretch; }
.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 8px; display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.panel-label { font-size: 11px; color: var(--muted); letter-spacing: 2px; font-family: 'Orbitron', sans-serif; }
.panel canvas { display: block; }

.stat {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 10px; display: flex; flex-direction: column; gap: 2px;
}
.stat span { font-size: 10px; color: var(--muted); letter-spacing: 2px; font-family: 'Orbitron', sans-serif; }
.stat b { font-size: 20px; font-family: 'Orbitron', sans-serif; font-weight: 700; }

.p-tag {
  margin-top: 6px; text-align: center; font-family: 'Orbitron', sans-serif; font-weight: 700;
  color: var(--accent); letter-spacing: 2px;
}
.p-tag.p2 { color: #facc15; }

.multi-keys { color: var(--muted); font-size: 12px; text-align: center; max-width: 720px; }
.game-wrap:not(.multi) ~ .multi-keys { display: none; }
#screen-game .multi-keys { display: none; }
.game-wrap.multi ~ .multi-keys { display: block; }

/* ===================== Touch controls ===================== */
.touch-controls { display: flex; flex-direction: column; gap: 10px; width: 100%; max-width: 360px; }
.tc-row { display: flex; gap: 10px; justify-content: center; }
.tc-btn {
  flex: 1; padding: 16px 0; border-radius: 12px; font-size: 20px; font-weight: 700;
  background: var(--panel); border: 1px solid var(--line); color: var(--text); cursor: pointer;
  user-select: none;
}
.tc-btn.small { font-size: 14px; }
.tc-btn:active { background: rgba(34,211,238,0.18); border-color: var(--accent); }

/* ===================== Overlays ===================== */
.overlay {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(5,8,16,0.72); backdrop-filter: blur(4px); z-index: 20;
}
.overlay-card {
  background: linear-gradient(160deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  border: 1px solid var(--line); border-radius: 18px; padding: 30px 34px; text-align: center;
  min-width: 280px; box-shadow: 0 30px 80px rgba(0,0,0,0.6);
}
.overlay-card h2 {
  font-family: 'Orbitron', sans-serif; font-size: 28px; letter-spacing: 2px; margin-bottom: 16px;
  background: linear-gradient(92deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.go-detail { color: var(--muted); margin-bottom: 18px; font-size: 15px; }
.go-detail b { color: var(--text); }
.score-form { margin-bottom: 18px; text-align: left; }
.score-form label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.score-form input {
  width: 100%; padding: 12px; border-radius: 10px; border: 1px solid var(--line);
  background: rgba(0,0,0,0.3); color: var(--text); font-size: 18px; font-family: 'Orbitron', sans-serif;
  text-transform: uppercase; letter-spacing: 3px; text-align: center;
}
.score-form input:focus { outline: none; border-color: var(--accent); }
.overlay-actions { display: flex; gap: 10px; }
.primary-btn {
  flex: 1; padding: 13px 20px; border-radius: 12px; cursor: pointer; border: none;
  background: linear-gradient(92deg, var(--accent), var(--accent2)); color: #06121a;
  font-weight: 800; font-size: 15px;
}
.primary-btn:hover { filter: brightness(1.08); }
.overlay-card .ghost-btn { margin-top: 10px; flex: 1; }
.overlay-actions .ghost-btn { margin-top: 0; }

/* ===================== Leaderboard ===================== */
.lb-card {
  width: 100%; max-width: 480px;
  background: linear-gradient(160deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid var(--line); border-radius: 20px; padding: 28px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
}
.lb-title {
  font-family: 'Orbitron', sans-serif; text-align: center; letter-spacing: 3px; font-size: 24px;
  margin-bottom: 18px;
}
.lb-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.lb-tab {
  flex: 1; padding: 10px; border-radius: 10px; cursor: pointer; font-weight: 700;
  background: var(--panel); border: 1px solid var(--line); color: var(--muted);
  font-family: 'Orbitron', sans-serif; font-size: 13px;
}
.lb-tab.active { color: #06121a; background: linear-gradient(92deg, var(--accent), var(--accent2)); border-color: transparent; }

.lb-table { width: 100%; border-collapse: collapse; margin-bottom: 18px; }
.lb-table th {
  text-align: left; font-size: 11px; color: var(--muted); padding: 8px 10px;
  letter-spacing: 1px; border-bottom: 1px solid var(--line); font-family: 'Orbitron', sans-serif;
}
.lb-table td { padding: 11px 10px; border-bottom: 1px solid rgba(255,255,255,0.05); font-size: 15px; }
.lb-table .rank { font-family: 'Orbitron', sans-serif; color: var(--muted); width: 36px; }
.lb-table .score { font-family: 'Orbitron', sans-serif; font-weight: 700; text-align: right; }
.lb-table .lines { text-align: right; color: var(--muted); width: 60px; }
.lb-table tr.top1 .rank { color: #facc15; }
.lb-table tr.top2 .rank { color: #cbd5e1; }
.lb-table tr.top3 .rank { color: #f97316; }
.lb-table tr.top1 .name, .lb-table tr.top1 .score { color: #facc15; }
.lb-empty { text-align: center; color: var(--muted); padding: 28px 10px !important; }

/* ===================== Responsive ===================== */
@media (max-width: 760px) {
  .game-wrap { gap: 12px; transform-origin: top center; }
  .board { width: 270px; height: 540px; }
  .side { min-width: 72px; }
  .stat b { font-size: 16px; }
  .panel canvas { width: 72px; height: 72px; }
  .touch-controls { display: flex; }
}

@media (max-width: 420px) {
  .board { width: 240px; height: 480px; }
  .side { min-width: 60px; }
  .mode-grid { grid-template-columns: 1fr; }
}

/* On desktop, hide touch controls unless multi is off and it's a touch device handled by JS */
@media (hover: hover) and (pointer: fine) {
  .touch-controls { display: none !important; }
}