@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Outfit:wght@300;500;700;900&display=swap');

/* ====== DARK THEME (default) ====== */
:root {
  --bg: #0a0a0f;
  --bg2: #12121a;
  --surface: #1a1a28;
  --border: #2a2a3a;
  --text: #e8e6f0;
  --text-dim: #8888aa;
  --correct: #00e5a0;
  --correct-glow: #00e5a044;
  --present: #f0a030;
  --present-glow: #f0a03044;
  --absent: #2e2e42;
  --absent-text: var(--text-dim);
  --accent: #7c5cfc;
  --key-unused-bg: #40405e;
  --key-unused-text: #dddcf0;
  --key-absent-bg: #1e1e2e;
  --key-absent-text: #6a6a80;
  --tile-size: min(62px, calc((100vw - 60px) / 5));
  --tile-gap: 6px;
}

/* ====== LIGHT THEME ====== */
[data-theme="light"] {
  --bg: #f4f4f8;
  --bg2: #ffffff;
  --surface: #e8e8f0;
  --border: #d0d0da;
  --text: #1a1a2e;
  --text-dim: #6666888;
  --correct: #00b880;
  --correct-glow: #00b88044;
  --present: #d89020;
  --present-glow: #d8902044;
  --absent: #c8c8d4;
  --absent-text: #555566;
  --accent: #6040e0;
  --key-unused-bg: #dddde8;
  --key-unused-text: #2a2a3e;
  --key-absent-bg: #b8b8c8;
  --key-absent-text: #777788;
}

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

body {
  font-family: 'Outfit', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  transition: background 0.3s, color 0.3s;
}

/* ====== HEADER ====== */
header {
  width: 100%;
  max-width: 520px;
  padding: 16px 20px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: 'Space Mono', monospace;
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 4px;
  background: linear-gradient(135deg, var(--correct), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo span {
  font-weight: 400; font-size: 0.7rem; letter-spacing: 1px;
  display: block; background: none;
  -webkit-text-fill-color: var(--text-dim); margin-top: -2px;
}

.header-btns { display: flex; gap: 8px; align-items: center; }

.header-btn {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); padding: 8px 14px; border-radius: 10px;
  font-family: 'Outfit', sans-serif; font-size: 0.85rem;
  font-weight: 500; cursor: pointer; transition: all 0.2s;
  touch-action: manipulation;
}
.header-btn:hover { background: var(--key-unused-bg); border-color: var(--accent); }
.header-btn.new-game-btn { color: var(--correct); border-color: var(--correct); }
.header-btn.new-game-btn:hover { background: rgba(0,229,160,0.1); }
.header-btn.settings-btn { font-size: 1.1rem; padding: 6px 10px; }

/* ====== SETTINGS PANEL ====== */
.settings-panel {
  width: 100%; max-width: 520px;
  max-height: 0; overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 20px;
}
.settings-panel.open {
  max-height: 200px;
  padding: 12px 20px;
}
.settings-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 0;
}
.settings-row + .settings-row {
  border-top: 1px solid var(--border);
}
.settings-label {
  font-size: 0.85rem; font-weight: 500; color: var(--text);
}
.settings-label small {
  display: block; font-size: 0.7rem; color: var(--text-dim); font-weight: 400; margin-top: 2px;
}

/* Toggle switch */
.toggle {
  position: relative; width: 44px; height: 24px; cursor: pointer;
  touch-action: manipulation;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute; inset: 0; background: var(--absent); border-radius: 12px;
  transition: background 0.2s;
}
.toggle input:checked + .toggle-track { background: var(--correct); }
.toggle-thumb {
  position: absolute; top: 2px; left: 2px; width: 20px; height: 20px;
  background: var(--bg2); border-radius: 50%; transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.toggle input:checked ~ .toggle-thumb { transform: translateX(20px); }

/* Difficulty buttons inside settings */
.diff-row { display: flex; gap: 6px; }
.diff-btn {
  flex: 1; padding: 6px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text-dim); font-family: 'Outfit', sans-serif;
  font-size: 0.7rem; font-weight: 600; cursor: pointer;
  transition: all 0.2s; text-align: center; touch-action: manipulation;
  text-transform: uppercase; letter-spacing: 1px;
}
.diff-btn .diff-mult {
  display: block; font-family: 'Space Mono', monospace;
  font-size: 0.6rem; margin-top: 1px; opacity: 0.6;
}
.diff-btn.active-easy { border-color: var(--correct); color: var(--correct); background: rgba(0,229,160,0.08); }
.diff-btn.active-normal { border-color: var(--accent); color: var(--accent); background: rgba(124,92,252,0.08); }
.diff-btn.active-hard { border-color: #ff4466; color: #ff4466; background: rgba(255,68,102,0.08); }
.diff-row.hidden { display: none; }

/* ====== TIMER / HINT BAR ====== */
.game-info-bar {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; width: 100%; max-width: 520px; padding: 0 20px;
  min-height: 28px;
}
.timer-display {
  font-family: 'Space Mono', monospace; font-size: 1rem;
  font-weight: 700; letter-spacing: 2px; color: var(--text-dim);
  transition: color 0.3s;
}
.timer-display.warning { color: #ff4466; }
.hint-display {
  font-family: 'Space Mono', monospace; font-size: 0.8rem;
  color: var(--correct); letter-spacing: 3px; text-transform: uppercase;
  opacity: 0; transition: opacity 0.5s;
}
.hint-display.visible { opacity: 1; }
.score-display {
  font-family: 'Space Mono', monospace; font-size: 0.85rem;
  color: var(--accent); font-weight: 700;
}

/* ====== GAME AREA ====== */
#game-area {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 12px 0; gap: 12px; max-width: 520px; width: 100%;
}

#board { display: grid; grid-template-rows: repeat(6, var(--tile-size)); gap: var(--tile-gap); }

.row { display: grid; grid-template-columns: repeat(5, var(--tile-size)); gap: var(--tile-gap); }

/* ====== TILES ====== */
.tile {
  width: var(--tile-size); height: var(--tile-size);
  border: 2px solid var(--border); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Mono', monospace; font-weight: 700;
  font-size: calc(var(--tile-size) * 0.45); text-transform: uppercase;
  transition: transform 0.1s, border-color 0.15s; background: var(--bg2);
}
.tile.filled { border-color: var(--text-dim); animation: pop 0.1s ease; }
.tile.reveal { animation: flip 0.5s ease forwards; }
.tile.correct {
  background: var(--correct); border-color: var(--correct); color: #0a0a0f;
  box-shadow: 0 0 20px var(--correct-glow), inset 0 0 12px rgba(255,255,255,0.15);
}
.tile.present {
  background: var(--present); border-color: var(--present); color: #0a0a0f;
  box-shadow: 0 0 20px var(--present-glow), inset 0 0 12px rgba(255,255,255,0.15);
}
.tile.absent { background: var(--absent); border-color: var(--absent); color: var(--absent-text); }

/* ====== ANIMATIONS ====== */
@keyframes pop { 50% { transform: scale(1.12); } }
@keyframes flip { 0% { transform: scaleY(1); } 50% { transform: scaleY(0); } 100% { transform: scaleY(1); } }
@keyframes shake { 0%,100%{transform:translateX(0)} 20%,60%{transform:translateX(-6px)} 40%,80%{transform:translateX(6px)} }
@keyframes bounce { 0%,100%{transform:translateY(0)} 40%{transform:translateY(-20px)} 60%{transform:translateY(-8px)} }
.row.shake { animation: shake 0.4s ease; }

/* ====== TOAST ====== */
#toast {
  position: fixed; top: 80px; left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); padding: 12px 24px; border-radius: 12px;
  font-weight: 500; font-size: 0.95rem; opacity: 0;
  pointer-events: none; transition: all 0.3s ease; z-index: 100;
  backdrop-filter: blur(12px); box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ====== KEYBOARD ====== */
#keyboard {
  width: 100%; max-width: 520px; padding: 6px 6px 16px;
  display: flex; flex-direction: column; gap: 6px;
}
.kb-row { display: flex; justify-content: center; gap: 5px; }

.key {
  height: 52px; min-width: 32px; padding: 0 8px; border: none; border-radius: 8px;
  background: var(--key-unused-bg);
  color: var(--key-unused-text);
  font-family: 'Outfit', sans-serif; font-weight: 700; font-size: 0.95rem;
  text-transform: uppercase; cursor: pointer; transition: all 0.2s;
  display: flex; align-items: center; justify-content: center;
  flex: 1; max-width: 44px;
  -webkit-tap-highlight-color: transparent;
  border: 1px solid rgba(255,255,255,0.08);
  touch-action: manipulation;
}
.key:active { transform: scale(0.93); }
.key.wide { max-width: 66px; font-size: 0.75rem; letter-spacing: 0.5px; }

.key.correct {
  background: var(--correct); color: #0a0a0f;
  border-color: var(--correct); box-shadow: 0 0 12px var(--correct-glow);
  font-weight: 900;
}
.key.present {
  background: var(--present); color: #0a0a0f;
  border-color: var(--present); box-shadow: 0 0 12px var(--present-glow);
  font-weight: 900;
}
.key.absent {
  background: var(--key-absent-bg); color: var(--key-absent-text);
  border-color: transparent;
}

/* Light theme key border override */
[data-theme="light"] .key {
  border-color: rgba(0,0,0,0.08);
}

/* ====== MODAL ====== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px); display: none; align-items: center;
  justify-content: center; z-index: 200; padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 20px; padding: 32px 28px; max-width: 380px;
  width: 100%; text-align: center; animation: modalIn 0.3s ease;
}
@keyframes modalIn { from{transform:scale(0.9) translateY(20px);opacity:0} to{transform:scale(1) translateY(0);opacity:1} }
.modal h2 { font-family:'Space Mono',monospace; font-size:1.4rem; margin-bottom:8px; letter-spacing:2px; }
.modal p { color:var(--text-dim); font-size:0.9rem; margin-bottom:20px; line-height:1.5; }
.modal .answer-reveal {
  font-family:'Space Mono',monospace; font-size:1.3rem; letter-spacing:6px;
  color:var(--correct); margin:12px 0 20px; text-transform:uppercase;
}
.stat-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin:20px 0; }
.stat-item .num { font-family:'Space Mono',monospace; font-size:1.6rem; font-weight:700; color:var(--text); }
.stat-item .label { font-size:0.7rem; color:var(--text-dim); text-transform:uppercase; letter-spacing:1px; margin-top:2px; }
.btn-play {
  background:linear-gradient(135deg,var(--correct),#00c896); color:#0a0a0f;
  border:none; padding:14px 40px; border-radius:12px;
  font-family:'Outfit',sans-serif; font-weight:700; font-size:1rem;
  cursor:pointer; letter-spacing:1px; transition:all 0.2s; margin-top:8px;
  touch-action: manipulation;
}
.btn-play:hover { transform:scale(1.03); box-shadow:0 4px 24px var(--correct-glow); }
.btn-close { position:absolute; top:14px; right:14px; background:none; border:none; color:var(--text-dim); font-size:1.4rem; cursor:pointer; }
.modal-inner { position:relative; }
.dist-bar-container { display:flex; align-items:center; gap:8px; margin:4px 0; }
.dist-label { font-family:'Space Mono',monospace; font-size:0.8rem; color:var(--text-dim); width:14px; text-align:right; }
.dist-bar {
  height:24px; background:var(--absent); border-radius:4px;
  display:flex; align-items:center; justify-content:flex-end;
  padding-right:8px; font-family:'Space Mono',monospace; font-size:0.75rem;
  font-weight:700; min-width:28px; transition:width 0.5s ease;
}
.dist-bar.highlight { background:var(--correct); color:#0a0a0f; }

/* ====== LEGEND ====== */
.legend { display:flex; gap:16px; justify-content:center; padding:4px 0 2px; flex-wrap:wrap; }
.legend-item { display:flex; align-items:center; gap:6px; font-size:0.7rem; color:var(--text-dim); letter-spacing:0.5px; }
.legend-dot { width:14px; height:14px; border-radius:4px; }
.legend-dot.c { background:var(--correct); }
.legend-dot.p { background:var(--present); }
.legend-dot.a { background:var(--absent); }

/* ====== RESPONSIVE ====== */
@media (max-height:680px) {
  :root { --tile-size:min(54px,calc((100vw - 60px)/5)); }
  .key { height:46px; }
  header { padding:10px 16px 8px; }
}