/* ── Variables ──────────────────────────────────── */
:root {
  --bg: #050505;
  --panel: #0f0f0f;
  --panel-border: #222;
  --text: #f0f4f8;
  --muted: #7a8a96;
  --accent: #00ff9f;

  /* Fluorescent piece colors */
  --c-I: #00e5ff;
  --c-O: #e8ff00;
  --c-T: #ff00f0;
  --c-S: #00ff55;
  --c-Z: #ff2222;
  --c-J: #4477ff;
  --c-L: #ff8800;
}

/* ── Reset ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: Inter, 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

body {
  display: grid;
  place-items: center;
  min-height: 100%;
  padding: 20px;
}

/* ── Overlay / Modal ────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}

.overlay.hidden { display: none; }

.modal {
  background: #0c0c0c;
  border: 1px solid #282828;
  border-radius: 14px;
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 320px;
  max-width: 480px;
  width: 100%;
  box-shadow: 0 0 60px rgba(0, 255, 159, 0.12);
}

.modal label {
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.modal input {
  background: #161616;
  border: 1px solid #333;
  border-radius: 8px;
  color: var(--text);
  font-size: 18px;
  padding: 10px 14px;
  width: 100%;
  outline: none;
  transition: border-color .2s;
}

.modal input:focus { border-color: var(--accent); }

.modal-sub {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-top: -8px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.modal-result {
  text-align: center;
  align-items: center;
}

.result-title {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: .06em;
  animation: popIn .4s cubic-bezier(.17,.67,.31,1.4) both;
}

.result-title.lose { color: var(--c-Z); text-shadow: 0 0 20px var(--c-Z); }
.result-title.win  { color: var(--c-S); text-shadow: 0 0 20px var(--c-S); animation: winPulse 1s ease-in-out infinite alternate; }

.result-name { font-size: 20px; color: var(--accent); font-weight: 600; }
.result-score,
.result-level,
.result-lines { font-size: 16px; color: var(--muted); }
.result-score strong,
.result-level strong,
.result-lines strong { color: var(--text); }

.rank-msg {
  font-size: 15px;
  color: var(--c-O);
  font-weight: 700;
  min-height: 22px;
}

/* Leaderboard modal */
.modal-lb { max-width: 540px; }

#lb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

#lb-table th {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: .05em;
  padding: 6px 10px;
  border-bottom: 1px solid #222;
  text-align: left;
}

#lb-table td {
  padding: 8px 10px;
  border-bottom: 1px solid #1a1a1a;
  color: var(--text);
}

#lb-table tr:first-child td { color: var(--c-O); font-weight: 700; }
#lb-table tr:nth-child(2) td { color: var(--muted); }
#lb-table tr:nth-child(3) td { color: #b06030; }

.lb-empty { color: var(--muted); text-align: center; padding: 16px; }

/* ── Buttons ────────────────────────────────────── */
button {
  border: 1px solid var(--accent);
  background: rgba(0, 255, 159, 0.08);
  color: var(--accent);
  border-radius: 8px;
  padding: 9px 18px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: background .15s, transform .1s;
  flex: 1;
}

button:hover  { background: rgba(0, 255, 159, 0.18); }
button:active { transform: scale(.97); }

.btn-secondary {
  border-color: #444;
  background: rgba(255,255,255,.04);
  color: var(--muted);
}
.btn-secondary:hover { background: rgba(255,255,255,.09); }

.btn-danger {
  border-color: var(--c-Z);
  background: rgba(255,34,34,.08);
  color: var(--c-Z);
}
.btn-danger:hover { background: rgba(255,34,34,.2); }

.btn-text {
  border: none;
  background: transparent;
  color: var(--accent);
  padding: 4px 0;
  font-size: 12px;
  cursor: pointer;
  text-decoration: underline;
}
.btn-text:hover { opacity: .7; }

/* ── Layout ────────────────────────────────────── */
.app {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  align-items: start;
  width: min(780px, 100%);
}

/* ── Game panel ────────────────────────────────── */
.game-panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 10px;
}

.canvas-wrapper {
  position: relative;
  line-height: 0;
}

#board, #fx {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}

#fx {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

/* ── HUD ───────────────────────────────────────── */
.hud {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 16px;
  display: grid;
  gap: 10px;
}

.hud-brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.hud-player {
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hud-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.hud-card {
  background: #111;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 10px;
}

.label {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.value {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.1;
  margin-top: 4px;
}

/* Level card */
.level-value { color: var(--accent); }
.level-bar-wrap { margin-top: 6px; height: 4px; background: #222; border-radius: 2px; overflow: hidden; }
.level-bar { height: 100%; background: var(--accent); border-radius: 2px; width: 0%; transition: width .4s ease, background-color .3s; }

/* Next / Hold preview */
.next-wrapper canvas,
.hold-wrapper canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #000;
  border-radius: 4px;
  margin-top: 6px;
}

/* Controls hint */
.controls {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.7;
}

kbd {
  display: inline-block;
  border: 1px solid #444;
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 11px;
  font-family: inherit;
  background: #1a1a1a;
  color: var(--text);
}

.hud-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.hud-actions button { flex: unset; }

/* Inline leaderboard */
.lb-preview ol { padding-left: 18px; font-size: 12px; color: var(--muted); margin-top: 6px; line-height: 1.8; }
.lb-preview li span.lb-name  { color: var(--text); }
.lb-preview li span.lb-score { color: var(--accent); font-weight: 700; float: right; }

/* ── Full-screen effects canvas ─────────────────── */
#global-fx {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 50;
}

/* ── Level-up banner ────────────────────────────── */
.levelup-banner {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 56px;
  font-weight: 900;
  letter-spacing: .06em;
  z-index: 60;
  pointer-events: none;
  animation: levelBannerAnim .9s cubic-bezier(.17,.67,.31,1.2) both;
  white-space: nowrap;
}

.levelup-banner.hidden { display: none; }

/* ── Neon title ─────────────────────────────────── */
.neon-title {
  font-size: 40px;
  font-weight: 900;
  letter-spacing: .1em;
  color: var(--accent);
  text-shadow:
    0 0 8px  var(--accent),
    0 0 20px var(--accent),
    0 0 40px rgba(0 255 159 / .5);
}

.neon-title.small { font-size: 22px; }

/* ── Animations ─────────────────────────────────── */
@keyframes popIn {
  from { transform: scale(.5); opacity: 0; }
  to   { transform: scale(1);  opacity: 1; }
}

@keyframes winPulse {
  from { text-shadow: 0 0 10px var(--c-S); }
  to   { text-shadow: 0 0 40px var(--c-S), 0 0 80px var(--c-S); }
}

@keyframes levelBannerAnim {
  0%   { transform: translate(-50%,-50%) scale(.4); opacity: 0; }
  50%  { transform: translate(-50%,-50%) scale(1.15); opacity: 1; }
  100% { transform: translate(-50%,-50%) scale(1);   opacity: 0; }
}

@keyframes scorePopAnim {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.35); }
  100% { transform: scale(1); }
}

.score-pop { animation: scorePopAnim .25s ease; }

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 680px) {
  body { padding: 10px; }

  .app {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .hud { width: 100%; max-width: 360px; }
  .game-panel { width: 100%; max-width: 320px; }
}