/* ============ Lode Runner HD — professional dark theme ============ */
:root {
  --bg-0: #0b0f16;
  --bg-1: #111826;
  --bg-2: #18202e;
  --panel: #151d2b;
  --line: #263349;
  --text: #dfe7f2;
  --text-dim: #8b98ac;
  --gold: #f2b632;
  --gold-bright: #ffd257;
  --accent: #3fa7d6;
  --danger: #e2574c;
  --ok: #4caf7d;
  --radius: 10px;
  font-size: 16px;
}

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

html, body {
  height: 100%;
  background: var(--bg-0);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  overflow: hidden;
}

#app {
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* ---------------- HUD ---------------- */
#hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 1.2rem;
  background: linear-gradient(180deg, #1a2336, var(--bg-1));
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  user-select: none;
  flex: 0 0 auto;
  position: relative;
  z-index: 2;
}
#hud::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(242, 182, 50, 0.45), transparent);
}

.hud-left, .hud-center, .hud-right {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.hud-left { gap: 1.1rem; }

.hud-logo { display: flex; align-items: center; gap: 0.55rem; }
.logo-mark { width: 30px; height: 23px; filter: drop-shadow(0 0 6px rgba(242, 182, 50, 0.45)); }

.hud-title {
  font-weight: 800;
  letter-spacing: 0.2em;
  font-size: 1.05rem;
  background: linear-gradient(180deg, #ffe9a8, var(--gold) 60%, #c98a14);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}

.hd-tag {
  margin-left: 0.45em;
  font-size: 0.6em;
  vertical-align: 0.25em;
  color: #1a1405;
  -webkit-text-fill-color: #1a1405;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  border-radius: 4px;
  padding: 0.12em 0.42em;
  letter-spacing: 0.1em;
}

.hud-chip, .hud-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 4.6rem;
  padding: 0.3rem 0.8rem 0.35rem;
  background: rgba(8, 12, 20, 0.55);
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  position: relative;
}
.hud-chip { border-color: rgba(242, 182, 50, 0.35); }
.hud-label { font-size: 0.58rem; font-weight: 700; letter-spacing: 0.24em; color: var(--text-dim); }
.hud-value {
  font-family: Consolas, "Cascadia Mono", monospace;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.hud-value.dim { color: #aab6c8; }
.hud-chip .hud-value { color: var(--gold-bright); }
#hud-gold  { color: var(--gold-bright); }
.hud-stat.gold { min-width: 5.6rem; padding-bottom: 0.55rem; }
.hud-bar {
  position: absolute;
  left: 0.7rem; right: 0.7rem; bottom: 0.3rem;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.07);
  overflow: hidden;
}
.hud-bar i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #c98a14, var(--gold-bright));
  box-shadow: 0 0 8px rgba(255, 210, 87, 0.7);
  transition: width 0.3s ease;
}
.hud-stat.lives .hud-value { color: #ff7a6e; }
.hud-stat.lives svg { width: 14px; height: 14px; fill: var(--danger); filter: drop-shadow(0 0 4px rgba(226, 87, 76, 0.6)); }

.hud-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: linear-gradient(180deg, #1c2638, var(--panel));
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: 700 0.66rem/1 "Segoe UI", sans-serif;
  letter-spacing: 0.14em;
  padding: 0.6rem 0.85rem;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.hud-btn svg { width: 12px; height: 12px; fill: currentColor; }
.hud-btn:hover {
  color: var(--gold-bright);
  border-color: rgba(242, 182, 50, 0.7);
  box-shadow: 0 0 14px rgba(242, 182, 50, 0.18);
  transform: translateY(-1px);
}

/* ---------------- Stage ---------------- */
#stage {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 14px;
  background:
    radial-gradient(1200px 700px at 50% 20%, rgba(63, 120, 214, 0.09), transparent 60%),
    radial-gradient(900px 500px at 50% 110%, rgba(242, 182, 50, 0.05), transparent 70%),
    var(--bg-0);
}

#frame {
  padding: 5px;
  border-radius: 12px;
  background: linear-gradient(180deg, #2a354b, #121927 40%, #0c111b);
  box-shadow:
    0 0 0 1px #070a10,
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 28px 80px rgba(0, 0, 0, 0.65),
    0 0 120px rgba(80, 130, 220, 0.08);
  line-height: 0;
}

#game {
  display: block;
  border-radius: 7px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.8);
  max-width: 100%;
  max-height: 100%;
}

/* ---------------- Keys bar ---------------- */
#keys-bar {
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 0.5rem 1rem;
  background: var(--bg-1);
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  user-select: none;
}
#keys-bar b {
  color: var(--text);
  font-family: Consolas, monospace;
  background: linear-gradient(180deg, #243047, #172030);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.05rem 0.4rem;
  margin-right: 0.2rem;
}

/* ---------------- Modals ---------------- */
#modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 13, 0.72);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 1;
  transition: opacity 0.2s ease;
}
#modal-backdrop.hidden { display: none; }

#modal {
  background: linear-gradient(180deg, #1a2334, var(--panel));
  border: 1px solid var(--line);
  border-top: 2px solid var(--gold);
  border-radius: var(--radius);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.7);
  max-width: min(680px, 92vw);
  max-height: 88vh;
  overflow: auto;
  animation: modal-in 0.22s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

@keyframes modal-in {
  from { transform: translateY(16px) scale(0.97); opacity: 0; }
  to   { transform: none; opacity: 1; }
}

#modal-content { padding: 2rem 2.4rem; }

.modal-title {
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--gold);
  text-align: center;
  text-shadow: 0 0 22px rgba(242, 182, 50, 0.4);
  margin-bottom: 0.4rem;
}
.modal-sub {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  margin-bottom: 1.4rem;
}
.modal-big-score {
  text-align: center;
  font-family: Consolas, monospace;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--gold-bright);
  margin: 0.6rem 0 1.2rem;
}

.modal-actions {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  margin-top: 1.4rem;
  flex-wrap: wrap;
}

.btn {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text);
  font: 700 0.8rem/1 "Segoe UI", sans-serif;
  letter-spacing: 0.12em;
  padding: 0.85rem 1.6rem;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-1px); }
.btn.primary {
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: #1a1405;
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(242, 182, 50, 0.35);
}
.btn.primary:hover { filter: brightness(1.08); color: #1a1405; transform: translateY(-1px); }

/* instructions table */
.help-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.45rem 1.1rem;
  margin: 1rem auto;
  max-width: 420px;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.help-grid .k {
  font-family: Consolas, monospace;
  color: var(--text);
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.15rem 0.5rem;
  text-align: center;
  font-size: 0.78rem;
}

/* level select */
.level-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 0.4rem;
  margin-top: 1rem;
}
.level-cell {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg-2);
  color: var(--text-dim);
  font: 600 0.72rem/1 Consolas, monospace;
  padding: 0.55rem 0;
  text-align: center;
  cursor: pointer;
  transition: all 0.12s ease;
}
.level-cell:hover { border-color: var(--gold); color: var(--gold); }
.level-cell.done { background: rgba(76, 175, 125, 0.12); color: var(--ok); border-color: rgba(76, 175, 125, 0.4); }
.level-cell.current { background: rgba(242, 182, 50, 0.15); color: var(--gold-bright); border-color: var(--gold); }

@media (max-width: 1100px) {
  .hud-btn span { display: none; }
}
@media (max-width: 900px) {
  .hud-left .hud-title { display: none; }
  .hud-chip, .hud-stat { min-width: 3.6rem; padding: 0.25rem 0.5rem; }
  #keys-bar { gap: 1rem; font-size: 0.65rem; }
}