/* ══════════════════════════════════════════════
   DeSnake  |  style.css
   ══════════════════════════════════════════════ */

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

:root {
  --bg:        #0a0a0f;
  --card:      #0d1117;
  --surface:   #161b22;
  --border:    rgba(255,255,255,.08);
  --green:     #4ade80;
  --green2:    #22c55e;
  --gold:      #fbbf24;
  --red:       #f87171;
  --text:      #f0fdf4;
  --text2:     rgba(255,255,255,.45);
  --font:      'Inter', system-ui, sans-serif;
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding-bottom: 32px;
  background-image:
    radial-gradient(ellipse 70% 40% at 15% 5%,  rgba(74,222,128,.06) 0%, transparent 70%),
    radial-gradient(ellipse 70% 40% at 85% 95%, rgba(34,197,94,.05) 0%, transparent 70%);
}

/* ── Nav ─────────────────────────────────────── */
nav {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: rgba(13,17,23,.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.nav-left { display: flex; align-items: center; gap: 9px; }
.nav-icon  { color: var(--green); font-size: 1.1rem; }
.nav-icon-svg { width: 22px; height: 22px; flex-shrink: 0; }
.nav-title { font-size: 1rem; font-weight: 800; color: rgba(255,255,255,.6); }
.nav-title span { color: var(--green); }
.nav-right { display: flex; align-items: center; gap: 8px; }
.nav-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text2);
  font-size: .78rem; font-weight: 500;
  padding: 6px 12px; cursor: pointer;
  font-family: var(--font);
  display: flex; align-items: center; gap: 5px;
  text-decoration: none;
  transition: background .15s, color .15s;
}
.nav-btn:hover { background: rgba(255,255,255,.1); color: var(--text); }
.nav-btn.muted { color: #ef4444; }

/* ── Stats bar ───────────────────────────────── */
.stats-bar {
  display: flex;
  gap: 10px;
  padding: 14px 20px 10px;
  width: 100%;
  max-width: 520px;
}
.stat {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 10px;
  text-align: center;
}
.stat.best   { border-color: rgba(74,222,128,.25); }
.stat.level  { border-color: rgba(251,191,36,.2);  }
.stat-label  { display: block; font-size: .58rem; font-weight: 700; letter-spacing: .8px; color: var(--text2); margin-bottom: 2px; }
.stat-val    { display: block; font-size: 1.35rem; font-weight: 800; line-height: 1; }
.stat.best  .stat-val  { color: var(--green); }
.stat.level .stat-val  { color: var(--gold); }

/* Score bump animation */
.bump { animation: statBump .25s ease; }
@keyframes statBump {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.4); }
  100% { transform: scale(1); }
}

/* ── Speed track ─────────────────────────────── */
.speed-track-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 520px;
  padding: 0 20px 10px;
}
.speed-label {
  font-size: .7rem; font-weight: 600; color: var(--text2);
  display: flex; align-items: center; gap: 4px;
  white-space: nowrap;
}
.speed-label i { color: var(--green); }
.speed-track {
  flex: 1;
  height: 6px;
  background: var(--surface);
  border-radius: 999px;
  overflow: hidden;
}
.speed-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green2), var(--green));
  border-radius: 999px;
  transition: width .4s ease;
  width: 10%;
}
.speed-max { font-size: .65rem; font-weight: 700; color: var(--text2); }

/* ── Canvas wrap ─────────────────────────────── */
.canvas-wrap {
  position: relative;
  width: min(90vmin, 500px);
  height: min(90vmin, 500px);
}

#gameCanvas {
  width: 100%;
  height: 100%;
  border-radius: 14px;
  border: 2px solid rgba(74,222,128,.2);
  box-shadow:
    0 0 0 1px rgba(74,222,128,.08),
    0 0 60px rgba(0,0,0,.6),
    0 0 30px rgba(74,222,128,.08);
  display: block;
}

/* ── Overlays ────────────────────────────────── */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(10,10,15,.88);
  backdrop-filter: blur(10px);
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.overlay.hidden { display: none; }

.ov-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 24px;
  text-align: center;
}

.ov-snake-icon { font-size: 3.5rem; animation: float 2s ease-in-out infinite; }
@keyframes float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.ov-pause-icon { font-size: 2.8rem; color: var(--green); }
.ov-go-emoji   { font-size: 2.8rem; }

.ov-title {
  font-size: 2rem; font-weight: 900; letter-spacing: 2px;
  background: linear-gradient(135deg, var(--green), #86efac);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.ov-best { font-size: .85rem; color: var(--text2); }
.ov-best strong { color: var(--green); }

.ov-btn {
  padding: 11px 28px;
  border: none; border-radius: 12px;
  font-family: var(--font);
  font-size: .9rem; font-weight: 700;
  cursor: pointer;
  display: flex; align-items: center; gap: 7px;
  transition: filter .15s, transform .1s;
  min-width: 160px; justify-content: center;
}
.ov-btn:active { transform: scale(.95); }
.ov-btn.primary {
  background: var(--green);
  color: #052e16;
  box-shadow: 0 4px 20px rgba(74,222,128,.35);
}
.ov-btn.primary:hover { filter: brightness(1.1); }
.ov-btn.ghost {
  background: var(--surface);
  color: var(--text2);
  border: 1px solid var(--border);
}
.ov-btn.ghost:hover { color: var(--text); background: rgba(255,255,255,.08); }

.ov-hints {
  display: flex; flex-direction: column; gap: 4px;
  font-size: .72rem; color: rgba(255,255,255,.3);
}
kbd {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 4px;
  background: rgba(255,255,255,.05);
  font-family: var(--font);
  font-size: .7rem;
}

/* Game Over stats */
.go-stats {
  display: flex;
  gap: 12px;
}
.go-stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 16px;
  display: flex; flex-direction: column; align-items: center;
  gap: 2px;
}
.gs-label { font-size: .62rem; font-weight: 700; letter-spacing: .6px; color: var(--text2); }
.gs-val   { font-size: 1.3rem; font-weight: 800; color: var(--text); }

.new-record {
  background: rgba(251,191,36,.15);
  border: 1px solid rgba(251,191,36,.4);
  color: var(--gold);
  font-size: .85rem; font-weight: 700;
  padding: 6px 16px; border-radius: 8px;
  display: flex; align-items: center; gap: 6px;
  animation: recordPop .4s ease;
}
.new-record.hidden { display: none; }
@keyframes recordPop {
  0%   { transform: scale(.7); opacity: 0; }
  70%  { transform: scale(1.06); }
  100% { transform: scale(1); opacity: 1; }
}

/* ── D-pad ───────────────────────────────────── */
.dpad {
  display: grid;
  grid-template-areas:
    ". up ."
    "left center right"
    ". down .";
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(3, 52px);
  gap: 4px;
  margin-top: 16px;
}
.dp-btn {
  width: 52px; height: 52px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .12s, color .12s, transform .08s;
  -webkit-tap-highlight-color: transparent;
}
.dp-btn svg { width: 18px; height: 18px; pointer-events: none; }
.dp-btn:hover { color: var(--text); background: rgba(255,255,255,.08); }
.dp-btn:active { background: rgba(74,222,128,.18); color: var(--green); transform: scale(.88); }
.dp-up     { grid-area: up; }
.dp-left   { grid-area: left; }
.dp-center { grid-area: center; background: transparent; border-color: transparent; cursor: default; }
.dp-right  { grid-area: right; }
.dp-down   { grid-area: down; }

/* ── Footer hint ─────────────────────────────── */
.footer-hint {
  font-size: .72rem;
  color: rgba(255,255,255,.2);
  margin-top: 12px;
  text-align: center;
  padding: 0 12px;
}

/* ── Responsive ──────────────────────────────── */
@media (min-width: 640px) {
  .dpad { display: none; } /* Hide dpad on desktop — use keyboard */
}
@media (max-width: 400px) {
  .stats-bar { gap: 6px; padding: 10px 12px 8px; }
  .stat-val  { font-size: 1.1rem; }
}