/* ---------------------------------------------------------------
   Supertonic — Audiobook Reader
   Editorial / broadcast-console aesthetic.
   Palette: cream paper, ink, sepia, single signal-red accent.
   --------------------------------------------------------------- */

:root {
  --paper:        #f4ede0;
  --paper-warm:   #ece2cf;
  --ink:          #1a1612;
  --ink-soft:     #2c241d;
  --sepia:        #6b5642;
  --sepia-soft:   #8a7560;
  --rule:         #c9bda6;
  --rule-soft:    #ddd3bd;
  --signal:       #c2410c;
  --signal-soft:  #e8d5c4;
  --field:        #eee4d1;
  --shadow:       0 1px 0 rgba(26, 22, 18, 0.04), 0 8px 24px -8px rgba(26, 22, 18, 0.18);

  --font-display: "Fraunces", ui-serif, Georgia, serif;
  --font-prose:   "Newsreader", ui-serif, Georgia, serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-prose);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background:
    radial-gradient(1200px 800px at 80% -10%, rgba(194, 65, 12, 0.04), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(107, 86, 66, 0.07), transparent 60%),
    var(--paper);
  background-attachment: fixed;
}

button { font-family: inherit; }

::selection { background: var(--ink); color: var(--paper); }

/* The HTML hidden attribute must always win against class display rules. */
[hidden] { display: none !important; }

/* ---------------- Boot / first-time loading screen ---------------- */

.boot {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 2rem;
  background: var(--paper);
}

.boot-inner {
  width: min(560px, 100%);
}

.boot-mark {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--sepia);
  margin-bottom: 1.5rem;
}

.boot-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-variation-settings: "opsz" 96;
  font-size: clamp(2.4rem, 5vw, 3.2rem);
  line-height: 1.05;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.boot-sub {
  font-family: var(--font-prose);
  font-style: italic;
  color: var(--sepia);
  margin: 0 0 2.5rem;
  max-width: 38ch;
}

.boot-files {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sepia);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.boot-files li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--rule-soft);
  align-items: center;
}
.boot-files li:last-child { border-bottom: 0; }

.boot-files .name { color: var(--ink-soft); letter-spacing: 0.02em; }
.boot-files .size { color: var(--sepia); }
.boot-files .state { font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; }
.boot-files .state.pending  { color: var(--sepia-soft); }
.boot-files .state.active   { color: var(--signal); }
.boot-files .state.done     { color: var(--ink); }

.boot-meter {
  height: 6px;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: 0;
  position: relative;
  overflow: hidden;
}

.boot-meter-fill {
  position: absolute;
  inset: 0 100% 0 0;
  background: var(--ink);
  transition: right 0.18s linear;
}

.boot-readout {
  margin-top: 0.6rem;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sepia);
  letter-spacing: 0.05em;
}

.boot-error {
  margin-top: 1.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--signal);
  border-radius: 2px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* ---------------- App shell ---------------- */

.app {
  min-height: 100%;
  padding: 2rem 2rem 11rem; /* leave room for player */
  max-width: 980px;
  margin: 0 auto;
}

/* Top bar */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.5rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.brand-mark {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--ink);
  background: var(--paper-warm);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--rule);
}

.brand-divider {
  width: 1px;
  height: 14px;
  background: var(--rule);
}

.brand-name {
  font-family: var(--font-display);
  font-variation-settings: "opsz" 72;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.005em;
}

.topbar-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.chip {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sepia);
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--rule);
  background: transparent;
}

.chip.active { color: var(--ink); border-color: var(--ink); }
.chip.signal { color: var(--signal); border-color: var(--signal); }

.icon-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink);
  padding: 0.4rem;
  border-radius: 2px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color 0.15s, background 0.15s;
}
.icon-btn:hover { border-color: var(--rule); background: var(--paper-warm); }

/* Manuscript / reading surface */

.page {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sepia);
}

.char-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sepia-soft);
}

.manuscript {
  width: 100%;
  min-height: 60vh;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--rule);
  padding: 1.75rem 0 0;
  font-family: var(--font-display);
  font-variation-settings: "opsz" 14;
  font-size: 1.2rem;
  line-height: 1.65;
  color: var(--ink);
  resize: none;
  outline: none;
  letter-spacing: -0.003em;
}

.manuscript::placeholder { color: var(--sepia-soft); font-style: italic; }

.manuscript-render {
  white-space: pre-wrap;
  cursor: text;
  min-height: 60vh;
  padding: 1.75rem 0 0;
  color: var(--sepia);
  transition: color 0.2s;
}

.manuscript-render .sentence {
  transition: color 0.25s, background-color 0.25s;
  border-radius: 2px;
  padding: 1px 2px;
  margin: 0 -2px;
  cursor: pointer;
}

.manuscript-render .sentence.done {
  color: var(--ink);
}

.manuscript-render .sentence.active {
  color: var(--ink);
  background: rgba(194, 65, 12, 0.12);
}

/* ---------------- Floating player console ---------------- */

.player {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  width: min(900px, calc(100% - 2rem));
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 2px;
  box-shadow: var(--shadow);
  z-index: 50;
}

.player::before {
  /* tape-counter style highlight strip */
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--signal) 0 12%, var(--rule) 12% 100%);
}

.player-grid {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.25rem;
  align-items: center;
  padding: 0.85rem 1rem;
}

.play {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  border: 0;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform 0.12s, background 0.12s;
  position: relative;
}
.play:hover:not(:disabled) { transform: scale(1.04); }
.play:disabled { opacity: 0.35; cursor: not-allowed; }
.play[data-state="playing"] { background: var(--signal); }
.play .icon-spin { animation: spin 0.9s linear infinite; }

@keyframes spin { to { transform: rotate(360deg); } }

.meter-col { min-width: 0; }

.track {
  position: relative;
  height: 4px;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  overflow: hidden;
}

.track-fill {
  position: absolute;
  inset: 0 100% 0 0;
  background: var(--ink);
  transition: right 0.08s linear;
}

.track-gen {
  /* shows synthesis progress separately from playback */
  position: absolute;
  inset: 0 100% 0 0;
  background: var(--signal);
  opacity: 0.18;
  transition: right 0.18s linear;
}

.track-meta {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 1rem;
  margin-top: 0.5rem;
  align-items: center;
}

.buffered {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--signal);
  letter-spacing: 0.06em;
  opacity: 0.8;
  min-width: 4ch;
  text-align: right;
}
.buffered:empty { display: none; }

.mono {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}

.status-line {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sepia);
  text-align: center;
}
.status-line.signal { color: var(--signal); }

.voice-col {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 200px;
}

.voice-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sepia);
}

.voice-row { display: flex; gap: 0.4rem; }

.voice-select, .lang-select {
  flex: 1;
  appearance: none;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: 0;
  padding: 0.45rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink);
  cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--sepia) 50%), linear-gradient(135deg, var(--sepia) 50%, transparent 50%);
  background-position: calc(100% - 12px) 50%, calc(100% - 8px) 50%;
  background-size: 4px 4px;
  background-repeat: no-repeat;
  padding-right: 22px;
}
.voice-select { max-width: 75px; }

/* ---------------- Settings drawer ---------------- */

.settings {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  grid-template-columns: 1fr auto;
}

.settings-scrim {
  background: rgba(26, 22, 18, 0.3);
  cursor: pointer;
}

.settings-card {
  width: min(420px, 90vw);
  background: var(--paper);
  border-left: 1px solid var(--rule);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  overflow-y: auto;
  order: 2;
  animation: slideIn 0.22s ease-out;
}

@keyframes slideIn {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

.settings-scrim { order: 1; }

.settings-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.settings-head h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-variation-settings: "opsz" 60;
  font-size: 1.5rem;
  margin: 0;
  letter-spacing: -0.01em;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sepia);
}

.field-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.field-row input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 1px;
  background: var(--rule);
  outline: none;
}

.field-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  cursor: pointer;
  border: 0;
}
.field-row input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  cursor: pointer;
  border: 0;
}

.field-hint {
  font-family: var(--font-prose);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--sepia);
}

.settings-foot {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}

.ghost-btn {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.55rem 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.ghost-btn:hover { border-color: var(--signal); color: var(--signal); }

.ghost-btn-sm {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.ghost-btn-sm:hover { border-color: var(--ink); }

/* ---------------- EPUB drop / TOC ---------------- */

.drop-hint {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(244, 237, 224, 0.92);
  border: 1.5px dashed var(--sepia);
  z-index: 20;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-variation-settings: "opsz" 60;
  color: var(--sepia);
  pointer-events: none;
  animation: dropPulse 1.6s ease-in-out infinite;
}

@keyframes dropPulse {
  0%, 100% { background: rgba(244, 237, 224, 0.92); }
  50% { background: rgba(232, 213, 196, 0.95); }
}

.page { position: relative; }

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--rule);
  overflow-y: auto;
  max-height: 60vh;
}
.toc-list li {
  border-bottom: 1px solid var(--rule-soft);
}
.toc-list a {
  display: block;
  padding: 0.7rem 0.25rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-family: var(--font-display);
  font-variation-settings: "opsz" 14;
  font-size: 0.95rem;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.toc-list a:hover { color: var(--signal); }
.toc-list a.active {
  color: var(--signal);
  background: rgba(194, 65, 12, 0.06);
}
.toc-list ol {
  list-style: none;
  padding: 0 0 0 1rem;
  margin: 0;
  border-top: 1px solid var(--rule-soft);
}

/* ---------------- Responsive ---------------- */

@media (max-width: 720px) {
  .app { padding: 1.25rem 1.25rem 12rem; }
  .player-grid { grid-template-columns: auto 1fr; }
  .voice-col { grid-column: 1 / -1; min-width: 0; flex-direction: row; align-items: center; gap: 0.75rem; }
  .voice-label { white-space: nowrap; }
  .manuscript { font-size: 1.1rem; }
  .brand-name { display: none; }
}