/* Minesweeper³ — HUD & overlay styling. The 3D scene lives behind the HUD;
   bars are pointer-transparent except their interactive children. */

:root {
  --bg0: #05070f;
  --text: #dbe4f3;
  --muted: #7c8aa5;
  --faint: #55627c;
  --surface: rgba(146, 168, 210, 0.07);
  --surface-2: rgba(146, 168, 210, 0.12);
  --border: rgba(170, 190, 230, 0.14);
  --accent: #4cc2ff;
  --accent-dim: rgba(76, 194, 255, 0.14);
  --amber: #ffc857;
  --danger: #ff6b6b;
  --success: #3ddc97;
  --mono: "SF Mono", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;
}

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

html, body { height: 100%; overflow: hidden; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, "Helvetica Neue", sans-serif;
  background: radial-gradient(130vmax 90vmax at 50% 36%, #131c33 0%, #0a0f1e 46%, var(--bg0) 100%);
  color: var(--text);
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

button { font-family: inherit; }

/* ---------- canvas & full-screen fx ---------- */

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}
#scene.dragging { cursor: grabbing; }
#scene.hovering { cursor: pointer; }

#vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at 50% 42%, transparent 52%, rgba(3, 5, 10, 0.55) 100%);
}

#flash {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(255, 82, 60, 0.38), rgba(255, 40, 30, 0.14) 55%, transparent 80%);
  opacity: 0;
  transition: opacity 0.9s ease;
  z-index: 5;
}
#flash.on { opacity: 1; transition: opacity 0.04s ease; }

/* ---------- glass primitives ---------- */

.seg, .chip, .btn-icon {
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.38);
}

.seg {
  display: flex;
  gap: 2px;
  padding: 3px;
  border-radius: 13px;
}

.seg-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 650;
  letter-spacing: 0.02em;
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: color 0.15s, background 0.15s, box-shadow 0.15s;
}
.seg-btn:hover { color: var(--text); }
.seg-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(76, 194, 255, 0.28);
}

.seg-icon { width: 14px; height: 14px; }

/* No-guess toggle — chip-shaped like the counters, colored like a seg-btn.
   `.note` flags per-board outcomes: a stepped-down mine count or a random
   fallback after generation failed (amber = "this board differs"). */
.toggle {
  appearance: none;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border-radius: 13px;
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.38);
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 650;
  letter-spacing: 0.02em;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s, box-shadow 0.15s;
}
.toggle svg { width: 14px; height: 14px; flex-shrink: 0; }
.toggle:hover { color: var(--text); }
.toggle.on {
  color: var(--accent);
  background: var(--accent-dim);
  box-shadow: inset 0 0 0 1px rgba(76, 194, 255, 0.28), 0 10px 28px rgba(0, 0, 0, 0.38);
}
.toggle.note {
  color: var(--amber);
  background: rgba(255, 200, 87, 0.1);
  box-shadow: inset 0 0 0 1px rgba(255, 200, 87, 0.32), 0 10px 28px rgba(0, 0, 0, 0.38);
}

/* Toast — one-line notices above the bottom HUD (no-guess board outcomes).
   Always on-screen so the note reaches phones, where the toggle's label text
   is hidden; role="status" announces it to screen readers. */
#toast {
  position: fixed;
  left: 50%;
  bottom: 78px;
  transform: translate(-50%, 8px);
  max-width: min(420px, calc(100vw - 32px));
  padding: 10px 16px;
  border-radius: 13px;
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.38);
  color: var(--text);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 30;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }

.chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border-radius: 13px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  min-width: 76px;
  justify-content: center;
}
.chip-icon { width: 15px; height: 15px; color: var(--muted); }
.chip-icon.flag { color: var(--amber); }
#mines-left { color: var(--amber); }
#mines-left.negative { color: var(--danger); }
#time { color: var(--text); min-width: 44px; }

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  border-radius: 13px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: filter 0.15s, transform 0.06s, background 0.15s;
}
.btn:active { transform: translateY(1px) scale(0.99); }

.btn-primary {
  background: linear-gradient(180deg, #6ed4ff, #2ea4e6);
  color: #04121c;
  box-shadow: 0 6px 18px rgba(46, 164, 230, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
.btn-primary:hover { filter: brightness(1.08); }

.btn-ghost {
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { background: rgba(146, 168, 210, 0.18); }

.btn-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--muted);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.btn-icon:hover { color: var(--text); background: var(--surface-2); }
.btn-icon svg { width: 17px; height: 17px; }

.hidden { display: none !important; }

/* ---------- top HUD ---------- */

#hud {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  pointer-events: none;
  z-index: 10;
}
#hud .seg, #hud .chip, #hud .btn, #hud .btn-icon,
#hud-bottom .seg, #hud-bottom .toggle, #hud-bottom .btn-icon { pointer-events: auto; }

.hud-cluster { display: flex; align-items: center; gap: 10px; }

#logo { display: flex; align-items: center; gap: 11px; padding: 4px 2px; }
.logo-cube { width: 27px; height: 27px; filter: drop-shadow(0 4px 10px rgba(76, 194, 255, 0.35)); }
.logo-text {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.15em;
  line-height: 1;
}
.logo-sup { color: var(--accent); }
.logo-text small {
  display: block;
  margin-top: 4px;
  font-size: 9.5px;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------- bottom HUD ---------- */

#hud-bottom {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  pointer-events: none;
  z-index: 10;
}

#hints {
  display: flex;
  align-items: center;
  gap: 13px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.01em;
}
#hints b { color: #b9c6dd; font-weight: 650; }
#hints .sep { width: 3px; height: 3px; border-radius: 50%; background: #35435f; }

/* ---------- overlay & panels ---------- */

.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(4, 7, 14, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 50;
  opacity: 1;
  transition: opacity 0.25s ease;
}
.overlay.hidden { opacity: 0; pointer-events: none; }

.panel {
  width: min(430px, calc(100vw - 36px));
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  padding: 28px 28px 24px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(32, 43, 68, 0.94), rgba(15, 21, 37, 0.96));
  border: 1px solid rgba(170, 190, 230, 0.17);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  transform: scale(1) translateY(0);
  transition: transform 0.28s cubic-bezier(0.2, 0.9, 0.3, 1.25);
}
.overlay.hidden .panel { transform: scale(0.92) translateY(14px); }

.panel h2 { font-size: 23px; font-weight: 800; letter-spacing: 0.01em; }
.panel h2.win { color: var(--success); }
.panel h2.lose { color: var(--danger); }
.panel h3 {
  margin: 20px 0 10px;
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

.result-icon { font-size: 42px; margin-bottom: 10px; }

.result-sub { margin-top: 7px; color: var(--muted); font-size: 13.5px; line-height: 1.5; }

.new-best {
  display: inline-block;
  margin-top: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(61, 220, 151, 0.12);
  border: 1px solid rgba(61, 220, 151, 0.35);
  color: var(--success);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.04em;
}

/* Same pill as .new-best, in the toggle's amber: this board differed
   (stepped-down mine count), so no best time was recorded. */
.reduced-note {
  display: inline-block;
  margin-top: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 200, 87, 0.1);
  border: 1px solid rgba(255, 200, 87, 0.32);
  color: var(--amber);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9px;
  margin-top: 18px;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 8px 10px;
  text-align: center;
}
.stat-label {
  display: block;
  font-size: 9.5px;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}
.stat-value {
  display: block;
  margin-top: 5px;
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
}

.result-actions { display: flex; gap: 10px; margin-top: 22px; }
.result-actions .btn { flex: 1; justify-content: center; padding: 12px 16px; }

/* Tip jar — win screen, shown at most weekly (rate-limited in main.js) */
.result-tip {
  margin-top: 14px;
  font-size: 12px;
  color: var(--faint);
  text-align: center;
}
.result-tip a {
  color: var(--muted);
  text-decoration: underline;
}
.result-tip a:hover { color: var(--accent); }

.help-lede { margin-top: 8px; color: var(--muted); font-size: 13.5px; line-height: 1.55; }
.help-lede b { color: var(--accent); }

.controls-list { list-style: none; display: grid; gap: 9px; }
.controls-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
}
.controls-list kbd {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 7px;
  padding: 4px 8px;
  white-space: nowrap;
}

.legend { display: grid; grid-template-columns: repeat(8, 1fr); gap: 7px; }
.legend-item {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 11px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 800;
  text-shadow: 0 0 12px currentColor;
}

/* ---------- responsive ---------- */

@media (max-width: 820px) {
  #hints { display: none; }
  #hud { padding: 12px 12px; flex-wrap: wrap; row-gap: 10px; }
  #hud-left { flex: 1; }
  #hud-center { order: 10; flex-basis: 100%; display: flex; justify-content: center; }
  .logo-text small { display: none; }
  #hud-bottom { padding: 12px; }
}

@media (max-width: 480px) {
  .btn-primary span { display: none; }
  .btn-primary { padding: 10px 12px; }
  .chip { min-width: 64px; padding: 8px 10px; font-size: 13.5px; }
  .seg-btn { padding: 7px 10px; font-size: 11.5px; }
  .logo-text { font-size: 12.5px; }
  .legend { grid-template-columns: repeat(4, 1fr); }
  /* icon-only no-guess toggle keeps the bottom bar on small phones */
  #noguess-label { display: none; }
  .toggle { padding: 10px 11px; }
}

/* About credit — help panel footer */
.about-credit {
  margin-top: 14px;
  font-size: 12px;
  color: var(--faint);
  text-align: center;
}
.about-credit a {
  color: var(--muted);
  text-decoration: underline;
}
.about-credit a:hover { color: var(--accent); }