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

/* ── Design Tokens ─────────────────────────────────────── */
:root {
  --bg:         #0f172a;
  --surface:    #1e293b;
  --surface-2:  #0f172a;
  --border:     #334155;
  --border-2:   #1e3a50;
  --accent:     #3b82f6;
  --accent-dim: #1d4ed8;
  --text:       #e2e8f0;
  --text-muted: #64748b;
  --text-dim:   #94a3b8;
  --mine-red:   #ef4444;
  --clock-blue: #60a5fa;
}

/* ── Base ──────────────────────────────────────────────── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 20px 16px 32px;
}

/* ── Game Wrapper ──────────────────────────────────────── */
#gw {
  width: 100%;
  max-width: 900px;
  display: flex;
  flex-direction: column;
  gap: 0;
  user-select: none;
}

/* ── Day Mode ──────────────────────────────────────────── */
#gw.day {
  --bg:         #d0e4f0;
  --surface:    #b8cfe0;
  --surface-2:  #c8dded;
  --border:     #7aaac8;
  --text:       #1e3a55;
  --text-muted: #4a7a9a;
  --text-dim:   #3a6a88;
}

/* ── Navigation Header ─────────────────────────────────── */
#nav {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px 12px 0 0;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

#brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

#brand-icon {
  background: var(--accent);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

#brand-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1.2;
}

#brand-sub {
  font-size: 9px;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  line-height: 1;
  margin-top: 2px;
}

/* ── Pill Difficulty Nav ───────────────────────────────── */
#diff-btns {
  display: flex;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}

.dbtn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  line-height: 1;
}

.dbtn:hover {
  color: var(--text);
}

.dbtn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 4px rgba(59, 130, 246, 0.4);
}

/* ── Nav Actions (day/night) ───────────────────────────── */
#nav-actions {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

#dn-btn {
  background: transparent;
  border: none;
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  color: var(--text-muted);
  transition: color 0.15s;
  line-height: 1;
}

#dn-btn:hover {
  color: var(--text);
}

/* ── Control Bar ───────────────────────────────────────── */
#hdr {
  background: var(--bg);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
}

.counter-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.counter-label {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* ── LCD Displays ──────────────────────────────────────── */
.lcd {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 16px;
  min-width: 90px;
  text-align: center;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 26px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

#mc { color: var(--mine-red); }
#tm { color: var(--clock-blue); }

/* ── Reset Button ──────────────────────────────────────── */
#sb {
  font-size: 28px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 14px;
  cursor: pointer;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  line-height: 1;
}

#sb:hover {
  border-color: var(--accent);
  background: var(--surface);
}

#sb:active {
  transform: scale(0.93);
}

/* ── Canvas Area ───────────────────────────────────────── */
#cc {
  position: relative;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  overflow: hidden;
  background: #0a111e;
  flex-grow: 1;
}

canvas {
  display: block;
  width: 100% !important;
  height: auto !important;
}

/* ── Overlay ───────────────────────────────────────────── */
#ov {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
  z-index: 10;
  cursor: default;
  backdrop-filter: blur(2px);
}

#ov.show {
  display: flex;
}

#ot {
  font-size: 26px;
  font-weight: 700;
}

#os {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ── Footer ────────────────────────────────────────────── */
#ft {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0 0 12px 12px;
  padding: 16px 20px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

/* ── High Scores Panel ─────────────────────────────────── */
#hs-panel {
  flex-grow: 1;
}

#hs-title {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

#hs-title svg {
  color: #f59e0b;
  flex-shrink: 0;
}

#hs-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

.hs-entry {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 10px;
}

.hs-entry-label {
  color: var(--text-muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.hs-entry-time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  color: var(--clock-blue);
}

.hs-entry-time.easy-color  { color: #34d399; }
.hs-entry-time.medium-color { color: #fbbf24; }
.hs-entry-time.hard-color  { color: var(--text-muted); }

/* Fallback for simple .hs-entry spans (game.js compatibility) */
.hs-entry span:first-child {
  color: var(--text-dim);
  display: block;
}

.hs-entry span:last-child {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--clock-blue);
  display: block;
}

/* ── Instructions Panel ────────────────────────────────── */
#st {
  flex-shrink: 0;
  width: 200px;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  padding: 12px 14px;
}

#st-title {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.inst-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.inst-list li {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
}

.inst-list li span:last-child {
  color: var(--text-dim);
}

#ver {
  display: block;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border-2);
  font-size: 9px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ── Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }