/* styles.css — dark, neon-tinted UI for Hexboard. */
:root {
  --bg: #0b0e17;
  --bg-2: #121828;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf5;
  --muted: #8a93a8;
  --accent: #4dd0ff;
  --accent-2: #b26bff;
  --good: #39d98a;
  --bad: #ff5d6c;
  --card-bg: rgba(0, 0, 0, 0.25);
  --radius: 14px;
  font-size: 16px;
}

/* ---- Earthy / whimsical theme ---- */
body[data-theme="earthy"] {
  --bg: #e7d9bd;
  --bg-2: #f5edd9;
  --panel: rgba(90, 70, 45, 0.07);
  --panel-border: rgba(90, 70, 45, 0.20);
  --text: #3b2f2a;
  --muted: #7c6a54;
  --accent: #c8683c;
  --accent-2: #8a9a52;
  --good: #5c8a3c;
  --bad: #bd4a2c;
  --card-bg: rgba(255, 255, 255, 0.45);
  background:
    radial-gradient(1100px 560px at 12% -10%, rgba(138, 154, 82, 0.38), transparent 60%),
    radial-gradient(900px 480px at 92% 0%, rgba(200, 104, 60, 0.30), transparent 55%),
    var(--bg);
}
body[data-theme="earthy"] .tab.active,
body[data-theme="earthy"] .btn.primary { color: #fdf6e6; }
body[data-theme="earthy"] .logo { filter: drop-shadow(0 0 8px rgba(200, 104, 60, 0.45)); }

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(77, 208, 255, 0.10), transparent 60%),
    radial-gradient(1000px 500px at 90% 0%, rgba(178, 107, 255, 0.10), transparent 55%),
    var(--bg);
  min-height: 100vh;
}

.app { max-width: 1180px; margin: 0 auto; padding: 20px; }

/* ---- loading screen ---- */
.loading {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
  transition: opacity 0.45s ease;
}
.loading.done { opacity: 0; pointer-events: none; }
.loading-inner { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.loading-logo {
  font-size: 64px; line-height: 1;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 0.55; transform: scale(0.96); } 50% { opacity: 1; transform: scale(1.04); } }
.loading-title { font-size: 26px; font-weight: 800; letter-spacing: 0.5px; }
.loading-sub { font-size: 13px; color: var(--muted); }
.loading-bar { width: 220px; height: 6px; border-radius: 3px; background: var(--panel); overflow: hidden; margin-top: 6px; }
.loading-fill { height: 100%; width: 0; border-radius: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width 0.2s ease; }

/* ---- topbar ---- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; flex-wrap: wrap; margin-bottom: 18px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  font-size: 40px; line-height: 1;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 10px rgba(77, 208, 255, 0.5));
}
.brand h1 { margin: 0; font-size: 26px; letter-spacing: 0.5px; }
.tagline { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

.mode-tabs { display: flex; gap: 8px; background: var(--panel); padding: 5px; border-radius: 12px; border: 1px solid var(--panel-border); }
.tab {
  border: none; background: transparent; color: var(--muted);
  padding: 9px 16px; border-radius: 9px; cursor: pointer; font-size: 14px; font-weight: 600;
  transition: all 0.15s ease;
}
.tab:hover { color: var(--text); }
.tab.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #08111c; }

/* ---- panels ---- */
.panel {
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: var(--radius); padding: 16px; margin-bottom: 16px;
  backdrop-filter: blur(6px);
}
.hidden { display: none; }

.controls { display: flex; gap: 22px; align-items: flex-end; flex-wrap: wrap; }
.control-group { display: flex; flex-direction: column; gap: 6px; }
.control-group label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.6px; }
.control-group .hint { color: var(--accent); font-weight: 700; }
.control-group.checkbox label { text-transform: none; letter-spacing: 0; font-size: 14px; color: var(--text); }

select, input[type="number"] {
  background: var(--bg-2); color: var(--text);
  border: 1px solid var(--panel-border); border-radius: 8px;
  padding: 8px 10px; font-size: 14px; outline: none;
}
select:focus, input:focus { border-color: var(--accent); }
input[type="number"] { width: 62px; }

.stepper { display: flex; align-items: center; gap: 8px; }
.iv { font-size: 12px; color: var(--accent); min-width: 90px; }

input[type="range"] { accent-color: var(--accent); width: 130px; }

.interval-readout {
  margin-left: auto; align-self: center; text-align: right;
  font-size: 12.5px; color: var(--muted); line-height: 1.7; min-width: 190px;
}
.interval-readout b { color: var(--text); }

/* ---- mode panels ---- */
.tip { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.tip b { color: var(--accent); }

.game-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.btn {
  border: 1px solid var(--panel-border); background: var(--bg-2); color: var(--text);
  padding: 9px 16px; border-radius: 9px; cursor: pointer; font-size: 14px; font-weight: 600;
  transition: all 0.15s ease;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #08111c; border: none; }
.btn.primary:hover { filter: brightness(1.1); }
.inline-check { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 6px; }

.scoreboard { margin-left: auto; display: flex; gap: 18px; font-size: 13px; }
.scoreboard .stat { display: flex; flex-direction: column; align-items: center; }
.scoreboard .stat b { font-size: 20px; color: var(--accent); font-variant-numeric: tabular-nums; }
.scoreboard .stat span { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }

#rhythm-canvas { width: 100%; display: block; border-radius: 10px; background: var(--card-bg); }
.feedback { text-align: center; font-size: 22px; font-weight: 800; height: 30px; margin-top: 8px; letter-spacing: 1px; }

.prompt-card {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 26px; border-radius: 12px; background: var(--card-bg);
  transition: box-shadow 0.2s ease, background 0.2s ease;
}
.prompt-card.correct { background: rgba(57, 217, 138, 0.12); box-shadow: 0 0 30px rgba(57, 217, 138, 0.35); }
.prompt-card.wrong { background: rgba(255, 93, 108, 0.10); }
.prompt-main { font-size: 34px; font-weight: 800; letter-spacing: 0.5px; }
.prompt-sub { font-size: 15px; color: var(--muted); }

/* ---- game-bar inline controls ---- */
.game-bar .control-group { gap: 4px; }
.game-bar .control-group label { font-size: 11px; }

/* reaction options */
.reaction-options { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 10px; padding-top: 12px; border-top: 1px solid var(--panel-border); }
.opt-group { display: flex; align-items: center; gap: 10px; }
.opt-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--muted); }
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; align-items: center; gap: 5px; font-size: 13px; padding: 5px 11px; border-radius: 20px; background: var(--bg-2); border: 1px solid var(--panel-border); cursor: pointer; user-select: none; }
.chip input { margin: 0; accent-color: var(--accent); }

/* ---- keyboard ---- */
.keyboard-wrap { display: flex; justify-content: center; overflow-x: auto; padding: 10px 0; }
#kbd-canvas { display: block; }

footer { text-align: center; color: var(--muted); font-size: 12px; margin-top: 18px; }

@media (max-width: 720px) {
  .controls { gap: 14px; }
  .interval-readout { margin-left: 0; text-align: left; }
  .mode-tabs { width: 100%; }
}