/* styles.css — Ear Training app */

:root {
  --bg: #14151a;
  --bg-elev: #1d1f27;
  --bg-elev-2: #262933;
  --border: #333644;
  --text: #eceef4;
  --text-dim: #9aa0b0;
  --accent: #e0a54a;
  --accent-2: #6ab7ff;
  --good: #4caf7d;
  --good-bg: #17301f;
  --bad: #e05a5a;
  --bad-bg: #331a1a;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0,0,0,0.35);
  font-synthesis: none;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 600px at 50% -10%, #22242e 0%, var(--bg) 60%);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}

.app {
  max-width: 860px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}

header.app-header {
  text-align: center;
  margin-bottom: 20px;
}
header.app-header h1 {
  margin: 0;
  font-size: 30px;
  letter-spacing: 0.5px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
header.app-header h1 .title-icon {
  width: 1.15em;
  height: 1.15em;
  border-radius: 22%;
  vertical-align: middle;
}
header.app-header .subtitle {
  color: var(--text-dim);
  font-size: 14px;
  margin-top: 4px;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 6px;
  border-radius: var(--radius);
  margin: 22px 0;
}
.tab {
  flex: 1;
  padding: 12px 10px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active {
  background: var(--accent);
  color: #1a1400;
}

/* Screens */
.screen { display: none; }
.screen.active { display: block; }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

/* Settings */
.settings {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 26px;
  align-items: flex-start;
}
.setting-group { display: flex; flex-direction: column; gap: 8px; }
.setting-group > label.group-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
  font-weight: 700;
}
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  user-select: none;
  transition: all 0.12s;
}
.chip:hover { border-color: var(--accent-2); color: var(--text); }
.chip.selected {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: #06233d;
  font-weight: 600;
}
select, input[type="number"] {
  background: var(--bg-elev-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
}
.range-row { display: flex; align-items: center; gap: 10px; }
input[type="range"] { accent-color: var(--accent-2); }

/* Collapsible options section */
.settings-card > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dim);
  user-select: none;
}
.settings-card > summary::-webkit-details-marker { display: none; }
.settings-card > summary::before {
  content: "▸";
  font-size: 11px;
  transition: transform 0.15s ease;
}
.settings-card[open] > summary::before { transform: rotate(90deg); }
.settings-card[open] > summary { margin-bottom: 14px; }

/* Play / action area */
.play-area {
  text-align: center;
  padding: 10px 0 6px;
}
.btn {
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
  font-size: 15px;
  padding: 13px 22px;
  transition: transform 0.08s, filter 0.15s, background 0.15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #1a1400; }
.btn-primary:hover { filter: brightness(1.06); }
.btn-secondary { background: var(--bg-elev-2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent-2); }
.btn-big { font-size: 18px; padding: 16px 30px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* "Clear scores" — a de-emphasized action sitting beside Replay */
.clear-scores {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  font-size: 14px;
}
.clear-scores:hover { color: var(--bad); border-color: var(--bad); }

.play-controls { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 6px; }

/* Answer buttons */
.answers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
  margin-top: 18px;
}
.answer-btn {
  padding: 15px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s;
}
.answer-btn:hover:not(:disabled) { border-color: var(--accent); }
.answer-btn:disabled { cursor: default; }
.answer-btn.correct { background: var(--good-bg); border-color: var(--good); color: #b9f2d2; }
.answer-btn.wrong { background: var(--bad-bg); border-color: var(--bad); color: #f2bcbc; }

/* Feedback */
.feedback {
  text-align: center;
  min-height: 26px;
  margin-top: 16px;
  font-size: 16px;
  font-weight: 600;
}
.feedback.good { color: var(--good); }
.feedback.bad { color: var(--bad); }

/* Stats bar */
.stats-bar {
  display: flex;
  justify-content: space-around;
  gap: 12px;
  margin-top: 4px;
}
.stat { text-align: center; }
.stat .num { font-size: 24px; font-weight: 800; }
.stat .lbl { font-size: 11px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--text-dim); }
.stat .num.acc { color: var(--accent-2); }
.stat .num.streak { color: var(--accent); }

/* Piano keyboard */
.piano-wrap { overflow-x: auto; padding: 6px 0 4px; }
.piano {
  position: relative;
  display: inline-flex;
  height: 150px;
  user-select: none;
  margin: 0 auto;
}
.key {
  position: relative;
  cursor: pointer;
}
.key.white {
  width: 42px;
  height: 150px;
  background: linear-gradient(#fbfbf7, #ececdf);
  border: 1px solid #b9b9ac;
  border-radius: 0 0 6px 6px;
  margin-right: -1px;
  z-index: 1;
}
.key.white:active, .key.white.pressed { background: linear-gradient(#e6e6d6, #d6d6c4); }
.key.black {
  width: 28px;
  height: 95px;
  background: linear-gradient(#2a2a2a, #050505);
  border: 1px solid #000;
  border-radius: 0 0 5px 5px;
  margin: 0 -14px;
  z-index: 2;
}
.key.black:active, .key.black.pressed { background: linear-gradient(#444, #111); }
.key .label {
  position: absolute;
  bottom: 6px;
  left: 0; right: 0;
  text-align: center;
  font-size: 10px;
  pointer-events: none;
}
.key.white .label { color: #777; }
.key.black .label { color: #ccc; }
.key.white.highlight { background: linear-gradient(#ffe6b0, #ffcf78); }
.key.black.highlight { background: linear-gradient(#e0a54a, #b57e1f); }

/* Dictation input display */
.dictation-io { margin-top: 16px; }
.token-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  min-height: 44px;
  padding: 10px;
  background: var(--bg-elev-2);
  border: 1px dashed var(--border);
  border-radius: 10px;
  align-items: center;
}
.token {
  padding: 7px 12px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: 14px;
}
.token.correct { border-color: var(--good); color: #b9f2d2; }
.token.wrong { border-color: var(--bad); color: #f2bcbc; }
.token-placeholder { color: var(--text-dim); font-size: 14px; }

.loader {
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
  margin: 10px 0;
}
.hidden { display: none !important; }

.hint {
  font-size: 13px;
  color: var(--text-dim);
  text-align: center;
  margin-top: 10px;
}

/* Note reveal (intervals & chords) */
.reveal { margin-top: 16px; text-align: center; }
.note-names {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}
.note-names .lead {
  color: var(--text-dim);
  font-weight: 500;
  margin-right: 6px;
}
.mini-staff {
  display: inline-block;
  background: #f8f8f2;
  border: 1px solid #d8d8cc;
  border-radius: 10px;
  padding: 4px 8px;
  overflow-x: auto;
  max-width: 100%;
}
.mini-staff svg { display: block; }

/* Dictation sub-mode tabs (smaller than main tabs) */
.submode-tabs { margin: 0 0 18px; }
.submode-tabs .tab { padding: 9px 8px; font-size: 14px; }
.submode-tabs .tab.active { background: var(--accent-2); color: #06233d; }

/* Staff notation input palette */
.palette {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  padding: 4px 0 14px;
}
.palette-group { display: flex; gap: 6px; flex-wrap: wrap; }
.pal-btn {
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  border-radius: 9px;
  padding: 9px 12px;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.12s;
  min-width: 40px;
}
.pal-btn:hover { border-color: var(--accent-2); }
.pal-btn.selected {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: #06233d;
  font-weight: 700;
}
.pal-btn.armed {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1400;
  font-weight: 700;
}

/* Staff (VexFlow renders dark notation → give it a light surface) */
.staff-scroll {
  background: #f8f8f2;
  border: 1px solid #d8d8cc;
  border-radius: 10px;
  padding: 8px 6px;
  overflow-x: auto;
  margin-top: 4px;
  cursor: crosshair;
}
.staff-scroll svg { display: block; }
/* Staff editor controls */
.edit-hint {
  font-size: 12.5px;
  color: var(--text-dim);
  text-align: center;
  margin: 8px 0 4px;
}
.editor {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}
.editor-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.pal-btn.wide { min-width: 92px; }
.pal-btn.danger { border-color: #6b3232; color: #f0b4b4; }
.pal-btn.danger:hover { border-color: var(--bad); }

.answer-block { margin-top: 18px; }
.answer-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
  font-weight: 700;
  margin-bottom: 6px;
}
#st-answer-staff { cursor: default; }

footer.app-footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  margin-top: 30px;
  line-height: 1.6;
}
footer.app-footer a {
  color: var(--accent-2);
  text-decoration: none;
}
footer.app-footer a:hover {
  text-decoration: underline;
}