:root {
  --ink: #17223b;
  --ink-soft: #5b6477;
  --paper: #f7f5ef;
  --paper-deep: #ece9df;
  --line: rgba(23, 34, 59, .12);
  --coral: #e9785d;
  --coral-soft: #f6d8cc;
  --mint: #b9d6cb;
  --white: #fffefa;
  --remaining-color: #a9adb4;
  --typed-color: #17223b;
  --error-color: #e9785d;
  --current-background: #f6d8cc;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { min-width: 320px; height: 100%; background: var(--ink); overflow: hidden; }
body { height: 100%; margin: 0; color: var(--ink); background: var(--ink); font-family: var(--font-sans); overflow: hidden; }
button, input { font: inherit; }
button { color: inherit; }
button:focus-visible, input:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }

.app-shell { display: grid; grid-template-columns: 274px minmax(0, 1fr); height: 100vh; min-height: 100vh; overflow: hidden; }
.sidebar { display: flex; position: sticky; top: 0; height: 100vh; min-height: 100vh; align-self: start; flex-direction: column; gap: 26px; padding: 34px 0 0; color: #f2f0e8; background: var(--ink); }
.brand-lockup { display: flex; align-items: center; padding: 0 25px; }
.brand-name { margin: 0; font-weight: 700; letter-spacing: -.04em; }
.brand-tagline { margin: 3px 0 0; color: #9ca7bc; font: 10px var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.upload-button { display: flex; align-items: center; gap: 12px; min-height: 84px; padding: 15px 13px; border: 1px dashed rgba(255,255,255,.28); color: #fffefa; cursor: pointer; font-size: 13px; font-weight: 700; transition: background .2s, border .2s; }
.upload-button:hover, .upload-button.is-dragging { border-color: var(--coral); background: rgba(233,120,93,.13); }
.upload-button strong { display: block; }
.upload-button small { display: block; margin-top: 5px; color: #9ca7bc; font: 10px var(--font-mono); font-weight: 400; }
.upload-button input { display: none; }
.upload-icon { display: grid; place-items: center; width: 19px; height: 19px; border: 1px solid var(--coral); color: var(--coral); font-size: 17px; font-weight: 400; line-height: 1; }
.sidebar-tabs { display: grid; gap: 0; padding: 0; border: 0; }
.sidebar-tabs .mode-button { width: 100%; padding: 8px 25px 10px; color: #fffefa; text-align: left; font: 600 18px/1 var(--font-sans); }
.sidebar-tabs .mode-button:hover, .sidebar-tabs .mode-button.is-active { color: var(--coral); background: transparent; }
.sidebar-tabs .mode-button.is-active { box-shadow: none; }
.sidebar-tabs .mode-button::after { display: none; }
.sidebar-practice-heading { display: block; width: 100%; margin: 2px 0 0; padding: 8px 25px 10px; border: 0; border-bottom: 1px solid rgba(255,255,255,.16); color: #fffefa; background: transparent; cursor: pointer; font: 600 18px/1 var(--font-sans); text-align: left; }
.sidebar-practice-heading:hover, .sidebar-practice-heading.is-active { color: var(--coral); }
.practice-library { display: flex; min-height: 0; flex: 1; flex-direction: column; gap: 14px; }
.book-list { display: grid; min-height: 0; flex: 1; align-content: start; grid-auto-rows: max-content; gap: 0; overflow-y: auto; direction: rtl; scrollbar-color: rgba(233,120,93,.8) transparent; scrollbar-width: thin; }
.book-list::-webkit-scrollbar { width: 8px; }
.book-list::-webkit-scrollbar-track { background: transparent; }
.book-list::-webkit-scrollbar-thumb { border: 2px solid var(--ink); background: rgba(233,120,93,.8); }
.book-list::-webkit-scrollbar-thumb:hover { background: var(--coral); }
.book-list > .book-details { direction: ltr; }
.book-details { border-top: 1px solid rgba(255,255,255,.12); background: transparent; }
.book-details:last-child { border-bottom: 1px solid rgba(255,255,255,.12); }
.book-details[open] { border-color: rgba(233,120,93,.5); background: rgba(255,255,255,.025); }
.book-details summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 25px; cursor: pointer; list-style: none; }
.book-details summary::-webkit-details-marker { display: none; }
.book-details summary::after { color: #68758e; content: '+'; font: 16px var(--font-mono); }
.book-details[open] summary::after { color: var(--coral); content: '-'; }
.book-summary-copy { display: grid; min-width: 0; gap: 4px; }
.book-summary-title { overflow: hidden; color: #f7f5ef; font-size: 13px; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
.book-summary-meta { overflow: hidden; color: #8792a8; font: 10px var(--font-mono); text-overflow: ellipsis; white-space: nowrap; }
.book-summary-progress { flex-shrink: 0; color: #8792a8; font: 10px var(--font-mono); }
.book-chapters { display: grid; gap: 3px; padding: 0 18px 7px; }
.chapter-button { display: grid; grid-template-columns: 27px 1fr; gap: 8px; padding: 8px; border: 0; border-left: 2px solid transparent; color: #9ca7bc; background: transparent; cursor: pointer; text-align: left; font-size: 12px; }
.chapter-button:hover { color: #f5f3ec; background: rgba(255,255,255,.04); }
.chapter-button.is-active { border-left-color: var(--coral); color: #fffefa; background: rgba(233,120,93,.11); }
.chapter-number { color: #68758e; font: 10px var(--font-mono); }
.chapter-button.is-active .chapter-number { color: var(--coral); }
.chapter-complete { color: var(--mint); font-size: 10px; }
.sidebar-footer { display: flex; align-items: center; gap: 8px; margin-top: auto; padding-right: 25px; padding-left: 25px; color: #7e899e; font-size: 10px; line-height: 1.4; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 3px rgba(185,214,203,.12); }

.main-content { position: relative; display: flex; height: 100vh; min-width: 0; min-height: 100vh; flex-direction: column; padding: 0; background: #f3f4f6; overflow: hidden; }
.view { position: relative; z-index: 1; max-width: none; margin: 0 auto; }
.main-content > .view[hidden] { display: none !important; }
.stats-view, .settings-view { max-height: 100%; overflow-x: hidden; overflow-y: auto; }
.mode-button { position: relative; padding: 0; border: 0; color: #9299a8; background: transparent; cursor: pointer; font-size: 12px; font-weight: 700; }
.mode-button::after { position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; background: transparent; content: ''; }
.mode-button:hover, .mode-button.is-active { color: var(--ink); }
.mode-button.is-active::after { background: var(--coral); }
.text-button { padding: 0; border: 0; color: var(--ink-soft); background: transparent; cursor: pointer; font: 11px var(--font-mono); }
.text-button:hover { color: var(--coral); }
.text-button span { margin-left: 4px; font-size: 16px; }
.view { padding-top: 44px; }
.practice-view { display: flex; flex: 1; min-height: 0; width: 100%; flex-direction: column; padding: 0; }
.eyebrow { margin: 0 0 13px; color: var(--coral); font: 11px var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
h1 { max-width: 580px; margin: 0; font: 500 clamp(36px, 5vw, 62px)/1.03 var(--font-sans); letter-spacing: -.045em; }
.stats-view h1, .settings-view h1 { margin-bottom: 39px; }
.session-card { padding: clamp(22px, 4vw, 42px); background: var(--white); box-shadow: 0 8px 24px rgba(18, 28, 51, .08); }
.practice-view .session-card { display: flex; flex: 1; min-height: 0; flex-direction: column; }
.session-toolbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.session-toolbar-actions { display: grid; justify-items: end; gap: 14px; }
.session-kicker { margin: 0 0 8px; color: var(--coral); font: 10px var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.session-toolbar h2 { margin: 0; font: 500 27px/1.1 var(--font-sans); }
.session-stats { display: flex; gap: 25px; text-align: right; }
.session-stats div { display: grid; gap: 4px; }
.session-stats strong { font: 500 16px var(--font-mono); }
.session-stats span { color: #9aa1af; font: 9px var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.session-reset { color: #9299a8; }
.typing-progress { height: 3px; margin: 32px 0 25px; background: var(--paper-deep); }
.typing-progress span { display: block; width: 0; height: 100%; background: var(--coral); transition: width .16s ease; }
.passage-frame { position: relative; min-height: 238px; padding: 2px 0 5px; cursor: text; }
.practice-view .passage-frame { flex: 1; min-height: 0; overflow-x: hidden; overflow-y: auto; }
.passage { color: var(--remaining-color); font: 400 clamp(21px, 2.5vw, 30px)/1.75 var(--font-sans); letter-spacing: -.012em; white-space: pre-wrap; }
.passage-image { margin: 1.5em 0; text-align: center; }
.passage-image img { display: block; width: auto; max-width: 100%; max-height: 70vh; margin: 0 auto; object-fit: contain; }
.passage span.is-paragraph-start { margin-left: 1.25em; }
.passage span.is-emphasis { font-style: italic; }
.passage span.is-current { color: var(--remaining-color); background: var(--current-background); }
.passage span.is-correct { color: var(--typed-color); }
.passage span.is-incorrect { color: var(--error-color); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; }
.typing-help { position: absolute; right: 0; bottom: -14px; margin: 0; color: #a8adb5; font: 10px var(--font-mono); letter-spacing: .03em; transition: opacity .2s; }
.typing-help.is-hidden { opacity: 0; }
.mobile-capture { position: absolute; left: -10000px; width: 1px; height: 1px; opacity: 0; }
.session-toolbar-meta { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px; color: #9299a8; font: 10px/1.5 var(--font-mono); }
kbd { padding: 3px 5px; border: 1px solid #d9d7d0; color: var(--ink-soft); font: 9px var(--font-mono); }
.footer-divider { padding: 0 5px; color: var(--coral); }

.stats-view { padding: 44px clamp(22px, 4vw, 42px) 40px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 25px; }
.stat-card { display: flex; flex-direction: column; min-height: 166px; padding: 21px; border: 1px solid var(--line); background: rgba(255,254,250,.62); }
.stat-card-accent { border-color: transparent; background: var(--ink); color: #fffefa; }
.stat-card-label { color: #858d9c; font: 10px var(--font-mono); text-transform: uppercase; letter-spacing: .05em; }
.stat-card-accent .stat-card-label { color: #abb5c8; }
.stat-card strong { margin-top: auto; font: 500 34px var(--font-mono); letter-spacing: -.08em; }
.stat-card-unit { margin-top: 8px; color: #9199a6; font-size: 11px; }
.stat-card-accent .stat-card-unit { color: #abb5c8; }
.stats-chart-card { border-top: 1px solid var(--ink); }
.history-heading { display: flex; align-items: baseline; justify-content: space-between; padding: 19px 0 14px; }
.history-heading h2 { margin: 0; font: 500 23px var(--font-sans); }
.history-heading span { color: #959ba7; font: 10px var(--font-mono); text-transform: uppercase; }
.stats-chart { width: 100%; min-height: 280px; }
.empty-history { margin: 0; padding: 20px 0; color: #9299a8; font-size: 13px; }
.epub-uplot { font-family: var(--font-sans); }
.epub-uplot .u-legend { margin: 10px 0 0; color: var(--ink-soft); font: 11px var(--font-mono); text-align: left; }
.epub-uplot .u-inline tr { margin-right: 14px; }
.chapter-results { position: absolute; inset: 0; z-index: 4; display: grid; align-items: start; justify-items: center; padding: 24px; overflow: auto; background: rgba(243, 244, 246, .94); }
.chapter-results[hidden] { display: none !important; }
.chapter-results-card { width: min(920px, 100%); padding: clamp(22px, 4vw, 36px); background: var(--white); box-shadow: 0 8px 24px rgba(18, 28, 51, .08); }
.chapter-results-card h2 { margin: 0; font: 500 27px/1.1 var(--font-sans); }
.chapter-results-metrics { display: flex; flex-wrap: wrap; gap: 25px; margin-top: 22px; }
.chapter-results-metrics div { display: grid; gap: 4px; }
.chapter-results-metrics strong { font: 500 16px var(--font-mono); }
.chapter-results-metrics span { color: #9aa1af; font: 9px var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.chapter-results-charts { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 28px; }
.chapter-results-charts figure { margin: 0; min-width: 0; }
.chapter-results-charts figcaption { margin: 0 0 8px; color: #858d9c; font: 10px var(--font-mono); letter-spacing: .05em; text-transform: uppercase; }
.chapter-chart { width: 100%; min-height: 180px; }
.chapter-results-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.chapter-results-primary, .chapter-results-secondary { padding: 9px 14px; border: 1px solid var(--ink); cursor: pointer; font: 11px var(--font-mono); }
.chapter-results-primary { color: #fffefa; background: var(--ink); }
.chapter-results-primary:hover { background: #243250; }
.chapter-results-secondary { color: var(--ink); background: transparent; }
.chapter-results-secondary:hover { border-color: var(--coral); color: var(--coral); }
.chapter-results-secondary[hidden] { display: none; }
.toast { position: fixed; right: 28px; bottom: 24px; z-index: 5; padding: 11px 15px; background: var(--ink); color: #fffefa; opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .2s, transform .2s; font: 11px var(--font-mono); }
.toast.is-visible { opacity: 1; transform: translateY(0); }
.file-drop-overlay { position: fixed; inset: 0; z-index: 10; display: grid; place-items: center; padding: 24px; background: rgba(23,34,59,.88); opacity: 0; pointer-events: none; visibility: hidden; transition: opacity .18s ease, visibility .18s ease; }
.file-drop-overlay.is-visible { opacity: 1; pointer-events: auto; visibility: visible; }
.file-drop-prompt { display: grid; justify-items: center; gap: 9px; width: min(430px, 100%); padding: 48px 28px; border: 1px dashed rgba(255,255,255,.65); color: #fffefa; text-align: center; }
.file-drop-icon { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--coral); color: var(--coral); font-size: 27px; line-height: 1; }
.file-drop-prompt strong { font-size: 19px; font-weight: 500; }
.file-drop-prompt small { color: #b8c0d0; font: 10px var(--font-mono); letter-spacing: .05em; text-transform: uppercase; }
.settings-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; max-width: 860px; }
.settings-card { border: 1px solid var(--line); background: var(--white); }
.settings-card h2 { margin: 0; padding: 18px 20px; border-bottom: 1px solid var(--line); font-size: 15px; }
.setting-row, .check-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 50px; padding: 10px 20px; border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; }
.check-row { justify-content: flex-start; cursor: pointer; }
.setting-row:last-child, .check-row:last-child { border-bottom: 0; }
.setting-row input[type="color"] { width: 34px; height: 25px; padding: 0; border: 1px solid var(--line); background: transparent; cursor: pointer; }
.setting-row select { max-width: 150px; padding: 5px 7px; border: 1px solid var(--line); background: var(--white); color: var(--ink); font-size: 12px; }
.charset-row { display: grid; gap: 8px; padding: 12px 20px; border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; }
.charset-row textarea { width: 100%; resize: vertical; padding: 8px; border: 1px solid var(--line); background: #f3f4f6; color: var(--ink); font: 11px/1.5 var(--font-mono); }
.charset-row textarea:focus { border-color: var(--coral); outline: 0; }
.check-row input { accent-color: var(--coral); }
.settings-reset { margin-top: 18px; padding: 9px 12px; border: 1px solid var(--line); background: transparent; color: var(--ink-soft); cursor: pointer; font: 11px var(--font-mono); }
.settings-reset:hover { border-color: var(--coral); color: var(--ink); }

@media (max-width: 820px) {
  html, body { height: auto; overflow: auto; }
  .app-shell { display: block; height: auto; min-height: 100vh; overflow: visible; }
  .main-content { height: auto; overflow: visible; }
  .stats-view, .settings-view { max-height: none; overflow: visible; }
  .sidebar { display: grid; position: static; height: auto; min-height: 0; grid-template-columns: 1fr 1fr; gap: 18px 20px; padding: 20px 0; }
  .brand-lockup { grid-column: 1 / -1; padding-right: 20px; padding-left: 20px; }
  .upload-button { align-self: start; }
  .sidebar-tabs { grid-column: 1 / -1; }
  .sidebar-practice-heading { grid-column: 1 / -1; }
  .practice-library { grid-column: 1 / -1; }
  .sidebar-footer { display: flex; }
  .book-list { max-height: 260px; }
  .chapter-button { min-width: 0; padding: 7px 10px; }
  .chapter-button.is-active { border-color: var(--coral); }
  .view { padding-top: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .settings-grid { grid-template-columns: 1fr; }
  .chapter-results-charts { grid-template-columns: 1fr; }
}
@media (max-width: 500px) {
  .session-toolbar { display: block; }
  .session-toolbar-actions { justify-items: start; gap: 12px; }
  .session-stats { justify-content: flex-start; margin-top: 19px; text-align: left; }
  .session-toolbar-meta { justify-content: flex-start; gap: 12px; line-height: 1.8; }
  .session-toolbar-meta > span:first-child { max-width: 140px; }
  .stats-grid { gap: 8px; }
  .stat-card { min-height: 135px; padding: 14px; }
  .stat-card strong { font-size: 25px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}