/* Phoneme Lab — dark technical aesthetic. */
:root {
  --bg: #0d1014;
  --panel: #151a21;
  --panel-2: #1b222b;
  --line: #2a333f;
  --ink: #e7edf3;
  --muted: #8a97a6;
  --accent: #4fd1c5;     /* teal */
  --accent-2: #f6c177;   /* amber */
  --danger: #ff7a85;
  --radius: 14px;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, "Cascadia Code", Menlo, monospace;
  --sans: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(79,209,197,.08), transparent 60%),
    radial-gradient(700px 500px at 0% 110%, rgba(246,193,119,.06), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  min-height: 100vh;
}

/* Top bar + steps */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 28px; border-bottom: 1px solid var(--line);
  background: rgba(13,16,20,.7); backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-family: var(--mono); font-weight: 700; letter-spacing: 2px; }
.blink { color: var(--accent); animation: blink 1.1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.steps { display: flex; gap: 8px; font-family: var(--mono); font-size: 13px; }
.step {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px;
  color: var(--muted);
}
.step b {
  display: grid; place-items: center; width: 18px; height: 18px;
  border-radius: 50%; background: var(--panel-2); font-size: 11px;
}
.step.is-active { color: var(--bg); background: var(--accent); border-color: var(--accent); }
.step.is-active b { background: rgba(0,0,0,.25); color: var(--ink); }
.step.is-done { color: var(--accent); border-color: var(--accent); }

/* Layout */
.wrap { max-width: 860px; margin: 0 auto; padding: 40px 24px 80px; }
.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px; box-shadow: 0 30px 60px -30px rgba(0,0,0,.7);
}
h1 { font-size: 28px; margin: 0 0 8px; letter-spacing: -.5px; }
.lede { color: var(--muted); margin: 0 0 24px; max-width: 60ch; }
code { font-family: var(--mono); color: var(--accent-2); }

/* Upload drop zones */
.form { display: grid; gap: 16px; }
.drop {
  display: grid; gap: 4px; position: relative;
  border: 1.5px dashed var(--line); border-radius: var(--radius);
  padding: 22px; cursor: pointer; transition: border-color .2s, background .2s;
}
.drop:hover, .drop.hover { border-color: var(--accent); background: rgba(79,209,197,.05); }
.drop input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.drop-title { font-weight: 600; }
.drop-hint { color: var(--muted); font-size: 13px; }
.drop-name { font-family: var(--mono); font-size: 13px; color: var(--accent); min-height: 1em; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  padding: 12px 20px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--ink); font-family: var(--mono);
  font-size: 14px; cursor: pointer; text-decoration: none; transition: transform .1s, filter .2s;
}
.btn:hover { filter: brightness(1.15); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #06201d; border-color: var(--accent); font-weight: 700; }
.btn[disabled] { opacity: .6; cursor: progress; }

/* Player */
.player, .player audio, audio { width: 100%; margin: 8px 0 20px; }
audio { filter: invert(.92) hue-rotate(170deg); border-radius: 8px; }

/* Alignment timeline */
.timeline { display: grid; gap: 8px; margin: 8px 0 24px; }
.word {
  border: 1px solid var(--line); border-radius: 10px; background: var(--panel);
  overflow: hidden;
}
.word summary {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; cursor: pointer; list-style: none;
}
.word summary::-webkit-details-marker { display: none; }
.word[open] summary { border-bottom: 1px solid var(--line); }
.word-text { font-weight: 600; }
.word-time { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.phones { display: flex; flex-wrap: wrap; gap: 8px; padding: 14px 16px; }
.phone {
  display: inline-flex; flex-direction: column; align-items: center;
  padding: 6px 12px; border-radius: 8px; background: var(--panel-2);
  border: 1px solid var(--line); font-family: var(--mono);
}
.phone b { color: var(--accent); }
.phone small { color: var(--muted); font-size: 11px; }

/* Picker + controls */
.picker { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.field-label { display: block; font-size: 12px; text-transform: uppercase;
  letter-spacing: 1px; color: var(--muted); margin-bottom: 6px; }
.select {
  width: 100%; padding: 11px 12px; border-radius: 10px; background: var(--panel);
  color: var(--ink); border: 1px solid var(--line); font-family: var(--mono); font-size: 14px;
}
.controls { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
.control label { display: flex; justify-content: space-between; font-size: 14px; margin-bottom: 8px; }
.control .val { font-family: var(--mono); color: var(--accent); }
.control small { display: block; color: var(--muted); font-size: 12px; margin-top: 6px; }
input[type=range] { width: 100%; accent-color: var(--accent); }

/* Result */
.result { margin-top: 24px; border-top: 1px solid var(--line); padding-top: 20px; }
.ab { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }

/* Alerts */
.alert {
  background: rgba(255,122,133,.08); border: 1px solid var(--danger);
  color: #ffd7db; border-radius: 10px; padding: 14px 16px; margin: 0 0 20px;
}
.alert pre { white-space: pre-wrap; font-size: 12px; overflow-x: auto; margin: 8px 0 0; }

.foot {
  text-align: center; color: var(--muted); font-size: 12px;
  font-family: var(--mono); padding: 24px;
}

@media (max-width: 640px) {
  .picker, .controls, .ab { grid-template-columns: 1fr; }
  .steps .step b { margin: 0; }
}

/* Disabled control (e.g. phase in the ffmpeg-only build) */
.control--disabled { opacity: .45; }
.control--disabled .val { color: var(--muted); }

/* Optional/required hints inside upload drop titles */
.drop-title em { font-style: normal; color: var(--muted); font-weight: 400; font-size: 12px; }

/* ============================================================
   Accessibility / older-user friendly sizing + word-pair UI
   ============================================================ */
body { font-size: 17px; }
:root { --muted: #aab6c4; }              /* higher-contrast muted text */
h1 { font-size: 32px; }
.lede.big { font-size: 19px; color: #d7e0e9; }
.field-label { font-size: 14px; }
.section-h { font-size: 22px; margin: 32px 0 12px; }

/* Bigger dropdowns */
.select.big { font-size: 19px; padding: 16px 14px; }

/* Word-pair layout */
.pairgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 18px; }
.slot { border: 1px solid var(--line); border-radius: 14px; padding: 18px; background: var(--panel); }
.slot h2 { font-size: 20px; margin: 0 0 12px; display: flex; align-items: center; gap: 10px; }
.slot h2 .num {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent); color: #06201d; font-size: 16px; font-weight: 700;
}
.occ { color: var(--accent-2); font-size: 15px; margin: 10px 0 14px; min-height: 1.2em; }

/* Tappable phoneme buttons */
.phones { display: flex; flex-wrap: wrap; gap: 10px; }
.phone-btn {
  min-width: 56px; min-height: 56px; padding: 8px 16px;
  font-family: var(--mono); font-size: 22px; font-weight: 700;
  border-radius: 12px; border: 2px solid var(--line);
  background: var(--panel-2); color: var(--ink); cursor: pointer;
  transition: transform .08s, border-color .15s, background .15s;
}
.phone-btn:hover { border-color: var(--accent); }
.phone-btn:active { transform: scale(.96); }
.phone-btn.is-on { background: var(--accent); color: #06201d; border-color: var(--accent); }

/* Big +/- steppers */
.steppers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.stepper { border: 1px solid var(--line); border-radius: 14px; padding: 16px; background: var(--panel); text-align: center; }
.stepper-label { font-size: 17px; font-weight: 600; margin-bottom: 12px; }
.stepper-label small { display: block; color: var(--muted); font-weight: 400; font-size: 13px; margin-top: 2px; }
.stepper-row { display: flex; align-items: center; justify-content: center; gap: 12px; }
.step-btn {
  width: 56px; height: 56px; border-radius: 50%; border: 2px solid var(--accent);
  background: var(--panel-2); color: var(--accent); font-size: 30px; line-height: 1;
  cursor: pointer; flex: 0 0 auto; transition: transform .08s, background .15s;
}
.step-btn:hover { background: rgba(79,209,197,.12); }
.step-btn:active { transform: scale(.92); }
.step-val { min-width: 90px; font-family: var(--mono); font-size: 22px; font-weight: 700; }

/* Big primary actions */
.btn.huge { font-size: 20px; padding: 18px 28px; width: 100%; margin-top: 26px; border-radius: 14px; }
.btn.huge:disabled { opacity: .5; }

.result-msg { font-size: 18px; color: var(--accent); font-weight: 600; }
.alert { font-size: 16px; }

@media (max-width: 680px) {
  .pairgrid, .steppers, .ab { grid-template-columns: 1fr; }
}

/* Per-slot controls (steppers now live inside each word slot) */
.mini-h { font-size: 16px; margin: 18px 0 10px; color: #d7e0e9; }
.slot .steppers { grid-template-columns: 1fr; gap: 12px; }
.slot .stepper { padding: 12px; }
.slot .step-btn { width: 48px; height: 48px; font-size: 26px; }
.slot .step-val { min-width: 80px; font-size: 20px; }

/* Combined upload dropzone */
.dropzone {
  position: relative; border: 2.5px dashed var(--line); border-radius: 16px;
  padding: 44px 24px; text-align: center; cursor: pointer; background: var(--panel);
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.hover { border-color: var(--accent); background: rgba(79,209,197,.06); }
.dropzone input[type=file] { display: none; }
.dz-icon { font-size: 40px; color: var(--accent); line-height: 1; margin-bottom: 8px; }
.dz-title { font-size: 22px; font-weight: 700; }
.dz-hint { color: var(--muted); font-size: 15px; margin-top: 4px; }
.filelist { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 8px; }
.filelist li { display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); }
.fl-type { font-family: var(--mono); font-size: 12px; padding: 3px 9px; border-radius: 999px;
  background: var(--accent); color: #06201d; font-weight: 700; }
.fl-name { font-size: 15px; word-break: break-all; }

/* ============================================================
   Waveform visualization (Wavesurfer.js)
   ============================================================ */
.waveform-container { margin: 32px 0; display: grid; gap: 32px; }

.waveform-panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
}

.waveform-label {
  font-size: 15px; font-weight: 600; margin: 0; padding: 14px 16px 10px;
  border-bottom: 1px solid var(--line); color: var(--accent);
}

.waveform-controls {
  display: flex; align-items: center; gap: 16px; padding: 12px 16px;
  background: var(--panel-2); border-bottom: 1px solid var(--line); font-size: 14px;
}

.waveform-btn {
  padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--panel); color: var(--ink); cursor: pointer;
  font-family: var(--mono); font-size: 14px; transition: background .15s, border-color .15s;
}

.waveform-btn:hover { border-color: var(--accent); background: rgba(79,209,197,.1); }
.waveform-btn:active { transform: scale(.95); }

.waveform-time {
  font-family: var(--mono); font-size: 13px; color: var(--muted); margin: 0 auto;
}

.zoom-controls {
  display: flex; align-items: center; gap: 8px; margin-left: auto;
}

.zoom-btn {
  width: 32px; height: 32px; border-radius: 6px; border: 1px solid var(--line);
  background: var(--panel); color: var(--ink); cursor: pointer; font-size: 16px;
  transition: border-color .15s, background .15s;
}

.zoom-btn:hover { border-color: var(--accent); background: rgba(79,209,197,.1); }

.zoom-label {
  font-family: var(--mono); font-size: 12px; color: var(--muted); min-width: 45px; text-align: center;
}

.waveform {
  height: 120px; background: linear-gradient(to bottom, var(--panel-2), var(--panel));
}

.word-labels {
  display: flex; position: relative; padding: 8px 0; margin: 0; min-height: 50px;
  font-family: var(--mono); font-size: 13px; user-select: none;
  border-top: 1px solid var(--line); background: rgba(0,0,0,.2);
}

.word-label {
  position: absolute; display: flex; flex-direction: column; align-items: center;
  color: var(--muted); transition: color .15s;
  max-width: 90px; text-align: center; top: 8px;
}

.word-label:hover { color: var(--accent); }

.word-label-text { font-weight: 600; color: var(--ink); white-space: nowrap; overflow: hidden;
  text-overflow: ellipsis; width: 100%; }
.word-label-time { font-size: 11px; color: var(--muted); margin-top: 2px; }

/* Wavesurfer styling */
.wavesurfer {
  width: 100%;
}

.wavesurfer-container { height: 120px; }

@media (max-width: 768px) {
  .waveform-controls { flex-wrap: wrap; gap: 10px; }
  .zoom-controls { margin-left: auto; }
  .waveform-label { font-size: 14px; }
  .waveform { height: 100px; }
  .word-labels { min-height: 45px; }
}