:root {
  --bg:      #050a0e;
  --bg2:     #0a1520;
  --card:    #0d1f2d;
  --card2:   #112233;
  --accent:  #00d4ff;
  --accent2: #00ff9d;
  --muted:   #6a8fa8;
  --text:    #e8f4f8;
  --border:  rgba(0,212,255,0.15);
  --glow:    rgba(0,212,255,0.08);
  --red:     #ff4d6d;
  --yellow:  #ffd166;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

body::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(0,212,255,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 85% 90%, rgba(0,255,157,0.05) 0%, transparent 60%),
    linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
  background-size: auto, auto, 60px 60px, 60px 60px;
  pointer-events: none; z-index: 0;
}
body > * { position: relative; z-index: 1; }

/* ── NAV ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  background: rgba(5,10,14,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.nav-logo {
  font-family: 'Syne', sans-serif;
  font-size: 18px; font-weight: 800;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
  transition: opacity .2s;
}
.nav-logo:hover { opacity: .75; }
.nav-back {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: .5px;
  transition: color .2s;
}
.nav-back:hover { color: var(--accent); }
.nav-back svg { transition: transform .2s; }
.nav-back:hover svg { transform: translateX(-3px); }
.nav-tag {
  font-family: 'Space Mono', monospace;
  font-size: 11px; letter-spacing: 2px;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 4px 12px; border-radius: 100px;
}

/* ── MAIN ── */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px 48px;
  gap: 22px;
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

.game-header { text-align: center; }
.game-eyebrow {
  font-family: 'Space Mono', monospace;
  font-size: 11px; letter-spacing: 3px;
  color: var(--accent2); text-transform: uppercase;
  margin-bottom: 10px;
}
.game-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800; letter-spacing: -1.5px;
  color: #fff; line-height: 1.05;
}
.game-title span {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.game-sub {
  font-size: 14px; color: var(--muted);
  margin-top: 10px; line-height: 1.7;
}
.game-sub code {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--accent);
  background: var(--glow);
  border: 1px solid var(--border);
  padding: 1px 7px; border-radius: 5px;
}

/* ── STATS ── */
.stats-bar { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 20px;
  min-width: 110px;
  text-align: center;
}
.stat-value {
  font-family: 'Space Mono', monospace;
  font-size: 24px; font-weight: 700;
  color: var(--accent);
}
.stat-value.green  { color: var(--accent2); }
.stat-value.yellow { color: var(--yellow); }
.stat-label {
  font-size: 10px; letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 5px;
}

/* ── TABULEIRO ── */
.board-wrap {
  position: relative;
  width: min(480px, 92vw);
  aspect-ratio: 1;
  background: #071019;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.5), 0 0 40px rgba(0,212,255,.05);
}
.board-wrap::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px; z-index: 2;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}
#gameCanvas { display: block; width: 100%; height: 100%; }

/* ── OVERLAYS ── */
.overlay {
  position: absolute; inset: 0;
  background: rgba(5,10,14,.92);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 10px; z-index: 10;
  padding: 16px;
  text-align: center;
  backdrop-filter: blur(4px);
}
.overlay.hidden { display: none; }
.overlay-code {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--muted);
}
.overlay-title {
  font-family: 'Syne', sans-serif;
  font-size: 22px; font-weight: 800;
  color: #fff;
}
.overlay-sub { font-size: 12px; color: var(--muted); line-height: 1.6; }
.overlay-error {
  font-family: 'Space Mono', monospace;
  font-size: 13px;
  color: var(--red);
}
.overlay-score {
  font-family: 'Space Mono', monospace;
  font-size: 15px;
  color: var(--accent);
  display: flex; flex-direction: column; gap: 6px; align-items: center;
}
.overlay-score span:first-child { font-size: 30px; font-weight: 700; }
.overlay-record { color: var(--yellow); font-size: 13px; animation: recPulse 1s ease infinite; }
.overlay-record.hidden { display: none; }
@keyframes recPulse { 0%,100%{transform:scale(1)} 50%{transform:scale(1.08)} }
.overlay-btn {
  margin-top: 6px;
  padding: 10px 26px;
  background: var(--accent); color: #050a0e;
  font-weight: 700; font-size: 13px;
  font-family: 'Space Mono', monospace;
  border: none; border-radius: 8px;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
}
.overlay-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,212,255,.35); }

/* ── D-PAD (mobile) ── */
.dpad {
  display: none;
  grid-template-areas: ". up ." "left down right";
  gap: 10px;
}
@media (pointer: coarse) { .dpad { display: grid; } }
.dpad-btn {
  width: 62px; height: 54px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--accent);
  font-size: 18px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
  touch-action: manipulation;
  -webkit-user-select: none; user-select: none;
}
.dpad-btn:active { background: var(--glow); border-color: var(--accent); }
.dpad-up    { grid-area: up; }
.dpad-left  { grid-area: left; }
.dpad-down  { grid-area: down; }
.dpad-right { grid-area: right; }

.hint-line {
  font-size: 12px; color: var(--muted);
}
.hint-line code {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  background: var(--glow);
  border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 4px;
}

/* ── FOOTER ── */
footer {
  text-align: center;
  padding: 28px 40px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  nav { padding: 10px 16px; }
  .nav-tag { display: none; }
  main { padding: 20px 12px 36px; gap: 16px; }
  .game-title { font-size: 30px; }
  .game-sub { font-size: 12px; }
  .stats-bar { gap: 8px; }
  .stat-card { min-width: 88px; padding: 9px 12px; }
  .stat-value { font-size: 19px; }
  .stat-label { font-size: 8.5px; }
  footer { padding: 18px 16px; font-size: 11px; }
}

/* ── BOTÃO DE SOM ── */
.som-btn {
  margin-left: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 4px 12px;
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--muted);
  cursor: pointer;
  transition: color .2s, border-color .2s;
}
.som-btn:hover { color: var(--accent); border-color: var(--accent); }
.hint-line b { color: var(--yellow); }

.overlay-btn.secundario {
  background: var(--card);
  color: var(--accent);
  border: 1px solid var(--border);
}
.overlay-btn.secundario:hover { border-color: var(--accent); box-shadow: 0 8px 24px rgba(0,212,255,.15); }

/* ── ÁREA DO JOGO / TELA CHEIA ── */
.game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  width: 100%;
}

/* modo nativo (desktop e Android) */
.game-area:fullscreen {
  background: var(--bg);
  justify-content: center;
  padding: 16px;
  overflow: auto;
}

/* fallback iOS: "fake fullscreen" via CSS */
.game-area.fs-fake {
  position: fixed; inset: 0;
  z-index: 3000;
  background: var(--bg);
  justify-content: center;
  padding: 16px;
  overflow: auto;
}

/* tabuleiro cresce para aproveitar a tela */
.game-area:fullscreen .board-wrap,
.game-area.fs-fake .board-wrap {
  width: min(94vw, calc(100dvh - 250px));
}
@media (pointer: coarse) {
  .game-area:fullscreen .board-wrap,
  .game-area.fs-fake .board-wrap {
    width: min(94vw, calc(100dvh - 360px)); /* reserva espaço p/ o d-pad */
  }
}

@media (max-width: 600px) {
  .game-area { gap: 16px; }
}