/* ===================================================================
   Speedreader — styles.css  (Phases 0–7 complete)
   Theming is entirely CSS-custom-property driven. Each theme sets a
   small set of --vars on body[data-theme="…"]; everything else reads
   them. Font / size / spacing / toggles are independent data-* attrs
   so they compose with any theme.
   =================================================================== */

/* ---------------- Themes (16, grouped as in the plan) ---------------- */
:root, body[data-theme="dark"] {
  --bg:#0a0a0b; --panel:#151517; --reader-bg:#0a0a0b; --text:#f5f5f5; --dim:#9a9a9a; --accent:#f59e0b; --border:#2a2a2d; --danger:#ef4444;
}
body[data-theme="midnight"]      { --bg:#0a0e1a; --panel:#131a2e; --reader-bg:#0a0e1a; --text:#dbe4ff; --dim:#8290b8; --accent:#6366f1; --border:#26304d; --danger:#f87171; }
body[data-theme="sepia"]         { --bg:#efe7d8; --panel:#e6dcc7; --reader-bg:#efe7d8; --text:#4a3f2f; --dim:#8a7a5f; --accent:#b45309; --border:#d3c6a8; --danger:#b91c1c; }
body[data-theme="highcontrast"]  { --bg:#000000; --panel:#0d0d0d; --reader-bg:#000000; --text:#ffffff; --dim:#c9c9c9; --accent:#ffd400; --border:#4a4a4a; --danger:#ff5555; }
body[data-theme="terminal"]      { --bg:#0c0f0c; --panel:#111611; --reader-bg:#0c0f0c; --text:#7CFC00; --dim:#4f8f2f; --accent:#7CFC00; --border:#1f2a1f; --danger:#ff5f5f; }
body[data-theme="eink"]          { --bg:#f7f7f5; --panel:#eeeeec; --reader-bg:#f7f7f5; --text:#1a1a1a; --dim:#6b6b6b; --accent:#555555; --border:#d5d5d2; --danger:#b91c1c; }
body[data-theme="encre"]         { --bg:#f5f4f0; --panel:#eceae3; --reader-bg:#f5f4f0; --text:#14110f; --dim:#6f6a63; --accent:#1e3a8a; --border:#dcd9cf; --danger:#b91c1c; }
body[data-theme="moka"]          { --bg:#241c17; --panel:#2e241d; --reader-bg:#241c17; --text:#ead9c9; --dim:#a08a76; --accent:#c98a5e; --border:#3d3026; --danger:#f87171; }
body[data-theme="terrace"]       { --bg:#2a1d18; --panel:#352420; --reader-bg:#2a1d18; --text:#f3d9c4; --dim:#b0917f; --accent:#e07a5f; --border:#43302a; --danger:#f87171; }
body[data-theme="matcha"]        { --bg:#14201a; --panel:#1b2a22; --reader-bg:#14201a; --text:#d7eada; --dim:#87a893; --accent:#85c17e; --border:#25382d; --danger:#f87171; }
body[data-theme="velvet"]        { --bg:#1a1022; --panel:#24162f; --reader-bg:#1a1022; --text:#ecdcff; --dim:#a389bd; --accent:#a855f7; --border:#332042; --danger:#f87171; }
body[data-theme="glacier"]       { --bg:#0d1720; --panel:#132030; --reader-bg:#0d1720; --text:#d6ecff; --dim:#7f9bb3; --accent:#38bdf8; --border:#203040; --danger:#f87171; }
body[data-theme="letterbox"]     { --bg:#000000; --panel:#0d0d0d; --reader-bg:#000000; --text:#f0f0f0; --dim:#9a9a9a; --accent:#d4af37; --border:#333333; --danger:#f87171; }
body[data-theme="interstellar"]  { --bg:#05070d; --panel:#0c1120; --reader-bg:#05070d; --text:#cfe0ff; --dim:#7385a8; --accent:#4b7bec; --border:#1a2233; --danger:#f87171; }
body[data-theme="dune"]          { --bg:#2a1f12; --panel:#352818; --reader-bg:#2a1f12; --text:#f0d9a8; --dim:#b39c6f; --accent:#e8a23d; --border:#43331e; --danger:#f87171; }
body[data-theme="shader"]        { --bg:#0b0b12; --panel:#14141f; --reader-bg:#0b0b12; --text:#e6e6ff; --dim:#8f8fb0; --accent:#ff6ec4; --border:#22222f; --danger:#f87171; }

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font-family: var(--reader-font, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif);
  -webkit-font-smoothing: antialiased;
}

/* Reader typography vars (compose over any theme) */
body[data-font-family="serif"]    { --reader-font: Georgia, "Times New Roman", serif; }
body[data-font-family="sans"]     { --reader-font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
body[data-font-family="dyslexic"] { --reader-font: "OpenDyslexic", "Comic Neue", "Comic Sans MS", sans-serif; }
body[data-font-size="s"]  { --word-size: 2.5rem; }
body[data-font-size="m"]  { --word-size: 3.5rem; }
body[data-font-size="l"]  { --word-size: 4.5rem; }
body[data-font-size="xl"] { --word-size: 5.5rem; }
body[data-letter-spacing="tight"]  { --word-tracking: -0.02em; }
body[data-letter-spacing="normal"] { --word-tracking: 0; }
body[data-letter-spacing="wide"]   { --word-tracking: 0.06em; }

#app { height: 100vh; display: flex; flex-direction: column; }
.dim { color: var(--dim); }
.tiny { font-size: 0.7rem; }
.spacer { flex: 1; }

kbd { background: var(--panel); border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; font-size: 0.85em; }

/* ---------------- Top bar ---------------- */
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; border-bottom: 1px solid var(--border); background: var(--panel); flex-shrink: 0; }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 6px; }

.icon-btn { background: transparent; border: 1px solid transparent; color: var(--text); font-size: 1.1rem; line-height: 1; padding: 8px 10px; border-radius: 8px; cursor: pointer; }
.icon-btn:hover { background: rgba(127,127,127,0.14); border-color: var(--border); }
.icon-btn:focus-visible, .btn:focus-visible, .tab:focus-visible, .link-btn:focus-visible, .theme-swatch:focus-visible, .seg-control button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn { background: transparent; border: 1px solid var(--border); color: var(--text); padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 0.95rem; }
.btn:hover { background: rgba(127,127,127,0.12); }
.btn-sm { padding: 5px 10px; font-size: 0.85rem; }
.btn-block { display: block; width: 100%; margin-top: 8px; }
.btn-primary { background: var(--accent); color: #10100a; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-danger { border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn.disabled { opacity: 0.4; pointer-events: none; }

/* ---------------- Sub bar ---------------- */
.subbar { display: flex; justify-content: space-between; padding: 8px 16px; font-size: 0.85rem; color: var(--dim); border-bottom: 1px solid var(--border); flex-shrink: 0; }

/* ---------------- Reader stage ---------------- */
.stage { flex: 1; position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; background: var(--reader-bg); outline: none; overflow: hidden; user-select: none; }

.paper-overlay { position: absolute; inset: 0; pointer-events: none; opacity: 0; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E"); }
body[data-paper="on"] .paper-overlay { opacity: 0.04; }

.status-label { position: absolute; top: 24px; left: 50%; transform: translateX(-50%); font-size: 0.75rem; letter-spacing: 0.15em; color: var(--dim); text-transform: uppercase; }

.word-row { position: relative; display: flex; align-items: baseline; justify-content: center; width: 100%; }

/*
 * FIXED-PIVOT LAYOUT — the heart of RSVP. The colored pivot letter must
 * sit at ONE unchanging horizontal point for every word. 3-column grid
 * `1fr auto 1fr`: equal side columns force the middle (pivot) column to
 * the exact centre of a fixed-width band centred on the stage. See §5.2.
 */
.pivot-frame { display: grid; grid-template-columns: 1fr auto 1fr; align-items: baseline; width: min(92vw, 900px); font-family: var(--reader-font); font-size: var(--word-size, 3.5rem); letter-spacing: var(--word-tracking, 0); font-weight: 500; white-space: pre; }
.seg-left  { grid-column: 1; text-align: right; overflow: hidden; }
.seg-right { grid-column: 3; text-align: left;  overflow: hidden; }
.seg-pivot { grid-column: 2; text-align: center; color: var(--accent); font-weight: 700; }
body[data-highlight="off"] .seg-pivot { color: inherit; font-weight: 500; }

.phantom { position: absolute; top: 50%; transform: translateY(-50%); font-family: var(--reader-font); font-size: calc(var(--word-size, 3.5rem) * 0.5); color: var(--text); opacity: 0.15; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 22vw; display: none; }
.phantom-prev { left: 4vw; text-align: left; }
.phantom-next { right: 4vw; text-align: right; }
body[data-phantom="on"] .phantom { display: block; }

.focus-guide { position: absolute; left: 50%; width: 2px; height: 18px; background: var(--accent); transform: translateX(-50%); opacity: 0.7; }
.focus-guide-top { top: calc(50% - 70px); }
.focus-guide-bottom { top: calc(50% + 52px); }
body[data-guides="off"] .focus-guide { display: none; }

.empty-state { position: absolute; text-align: center; color: var(--dim); padding: 0 20px; }
.empty-state p { margin: 4px 0; }

.bookmark-btn { position: absolute; bottom: 20px; right: 20px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

/* ---------------- Footer ---------------- */
.footer { display: flex; justify-content: space-between; align-items: center; padding: 8px 16px; border-top: 1px solid var(--border); background: var(--panel); font-size: 0.85rem; color: var(--dim); flex-shrink: 0; gap: 10px; }
.footer-left { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 30vw; }
.link-btn { background: transparent; border: none; color: var(--dim); cursor: pointer; font-size: 0.85rem; }
.link-btn:hover { color: var(--text); }

/* ---------------- Modals ---------------- */
.modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; z-index: 100; padding: 20px; }
.modal-backdrop[hidden] { display: none; }
.modal { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; width: 100%; max-width: 560px; max-height: 88vh; overflow-y: auto; padding: 20px 24px 24px; }
.modal-wide { max-width: 680px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; gap: 10px; }
.modal-header h2 { margin: 0; font-size: 1.2rem; }

.tabs { display: flex; gap: 4px; margin: 12px 0 16px; border-bottom: 1px solid var(--border); }
.tab { background: transparent; border: none; color: var(--dim); padding: 8px 4px; margin-right: 16px; cursor: pointer; font-size: 0.95rem; border-bottom: 2px solid transparent; }
.tab.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.tabs-inline { margin: 0; border: none; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.field-label { display: block; font-size: 0.8rem; color: var(--dim); margin: 12px 0 4px; }
.text-input, .textarea, .select { width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 10px 12px; font-family: inherit; font-size: 0.95rem; }
.text-input:focus, .textarea:focus, .select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.text-input-sm { width: 90px; padding: 5px 8px; }
.textarea { min-height: 220px; resize: vertical; line-height: 1.5; }
.meter { font-size: 0.8rem; color: var(--dim); margin-top: 8px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.privacy-note { font-size: 0.75rem; color: var(--dim); margin-top: 14px; }

.dropzone { border: 2px dashed var(--border); border-radius: 12px; padding: 32px 16px; text-align: center; cursor: pointer; }
.dropzone.dragover { border-color: var(--accent); background: rgba(127,127,127,0.08); }
.import-status { margin-top: 12px; font-size: 0.9rem; }

/* ---------------- Library ---------------- */
.library-toolbar { display: flex; align-items: center; gap: 8px; margin: 8px 0 14px; flex-wrap: wrap; }
.library-list .book-row { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--border); gap: 12px; }
.library-list .book-row:last-child { border-bottom: none; }
.book-meta { min-width: 0; }
.book-title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.book-sub { font-size: 0.8rem; color: var(--dim); }
.book-actions { display: flex; gap: 4px; flex-shrink: 0; flex-wrap: wrap; justify-content: flex-end; }
.mini-progress { height: 4px; background: var(--border); border-radius: 3px; overflow: hidden; margin-top: 6px; }
.mini-progress > div { height: 100%; background: var(--accent); }

/* ---------------- Browse (full-text) ---------------- */
.modal-full { padding: 0; }
.modal-fullscreen { max-width: 100%; width: 100%; height: 100%; max-height: 100%; border-radius: 0; border: none; display: flex; flex-direction: column; padding: 14px 18px; }
.browse-head-left { display: flex; align-items: center; gap: 10px; min-width: 0; }
.browse-filename { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.browse-search { max-width: 220px; }
.browse-progress { display: flex; align-items: center; gap: 10px; margin: 8px 0 12px; }
.browse-progress-bar { position: relative; flex: 1; height: 6px; background: var(--border); border-radius: 4px; }
.browse-progress-fill { height: 100%; background: var(--accent); border-radius: 4px; opacity: 0.5; }
.browse-progress-marker { position: absolute; top: -3px; width: 3px; height: 12px; background: var(--accent); border-radius: 2px; }
.browse-body { flex: 1; overflow-y: auto; }
.browse-panel { display: none; }
.browse-panel.active { display: block; }
.browse-hint { margin-top: 0; }
.browse-para { margin: 0 0 1em; line-height: 1.9; font-size: 1.05rem; }
.browse-word { cursor: pointer; border-radius: 3px; padding: 0 1px; }
.browse-word:hover { background: rgba(127,127,127,0.18); }
.browse-word.current { background: var(--accent); color: #10100a; }
.browse-word.search-hit { background: rgba(245,158,11,0.35); }
.mark-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--border); gap: 10px; }
.mark-row:last-child { border-bottom: none; }

/* ---------------- Settings ---------------- */
.settings-section { margin: 18px 0; }
.settings-section h3 { font-size: 0.9rem; margin: 0 0 10px; color: var(--dim); text-transform: uppercase; letter-spacing: 0.05em; }
.toggle-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; gap: 12px; cursor: pointer; }
.toggle-row input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }
.seg-control { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin: 0 8px 8px 0; }
.seg-control button { background: transparent; border: none; color: var(--text); padding: 7px 14px; cursor: pointer; font-size: 0.9rem; border-right: 1px solid var(--border); }
.seg-control button:last-child { border-right: none; }
.seg-control button.active { background: var(--accent); color: #10100a; font-weight: 600; }
.settings-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.theme-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(76px, 1fr)); gap: 8px; margin-bottom: 12px; }
.theme-swatch { border: 2px solid var(--border); border-radius: 8px; padding: 8px 6px; cursor: pointer; text-align: center; font-size: 0.72rem; background: transparent; color: var(--text); }
.theme-swatch.active { border-color: var(--accent); }
.theme-dot { width: 100%; height: 22px; border-radius: 5px; margin-bottom: 5px; display: flex; align-items: center; justify-content: center; }
.theme-dot span { width: 9px; height: 9px; border-radius: 50%; }

/* ---------------- Stats ---------------- */
.stats-top { display: flex; align-items: center; gap: 20px; margin: 12px 0 20px; flex-wrap: wrap; }
.goal-ring { position: relative; width: 120px; height: 120px; }
.goal-ring svg { transform: rotate(-90deg); }
.ring-track { fill: none; stroke: var(--border); stroke-width: 10; }
.ring-fill { fill: none; stroke: var(--accent); stroke-width: 10; stroke-linecap: round; stroke-dasharray: 327; stroke-dashoffset: 327; transition: stroke-dashoffset 0.5s; }
.goal-ring-label { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.goal-ring-label strong { font-size: 1.5rem; }
.streak-block { flex: 1; min-width: 160px; }
.streak-num { font-size: 1.8rem; }
.goal-edit { display: block; margin-top: 10px; font-size: 0.85rem; color: var(--dim); }
.stat-tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 20px; }
.stat-tile { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 14px; text-align: center; }
.stat-val { font-size: 1.4rem; font-weight: 700; }
.chart-title { font-size: 0.9rem; color: var(--dim); text-transform: uppercase; letter-spacing: 0.05em; }
.bar-chart { display: flex; align-items: flex-end; gap: 8px; height: 120px; margin: 10px 0; }
.bar-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.bar-fill { width: 60%; background: var(--accent); border-radius: 4px 4px 0 0; min-height: 2px; }
.bar-label { font-size: 0.7rem; color: var(--dim); }

.shortcut-table { width: 100%; border-collapse: collapse; margin: 8px 0; }
.shortcut-table td { padding: 7px 4px; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.shortcut-table td:first-child { white-space: nowrap; width: 40%; }

/* ---------------- Onboarding ---------------- */
.onboarding-card { max-width: 460px; text-align: center; }
.onboarding-card h2 { font-size: 1.4rem; }
.onboarding-sample { padding: 30px 0; }
.onboarding-word { font-size: 3rem; width: 100%; }
.onboarding-speed { margin: 10px 0 20px; }
.onboarding-speed input[type="range"] { width: 100%; accent-color: var(--accent); }
.onboarding-zone { margin-top: 8px; color: var(--dim); }
.onboarding-skip { display: block; margin: 12px auto 0; }

/* ---------------- Toast ---------------- */
.toast { position: fixed; bottom: 70px; left: 50%; transform: translateX(-50%); background: var(--panel); border: 1px solid var(--border); color: var(--text); padding: 10px 18px; border-radius: 10px; z-index: 200; box-shadow: 0 6px 24px rgba(0,0,0,0.35); font-size: 0.9rem; }
.toast[hidden] { display: none; }

@media (max-width: 560px) {
  .footer-center { display: none; }
  .stat-tiles { grid-template-columns: 1fr; }
  .browse-search { max-width: 120px; }
}