:root {
  --paper: #f4f0e7;
  --paper-deep: #e8e0d1;
  --ink: #18231e;
  --ink-soft: #58615b;
  --forest: #1f4d3a;
  --forest-dark: #14372a;
  --lime: #d7e7a4;
  --cream: #fffdf7;
  --rust: #a34d36;
  --line: rgba(24, 35, 30, .14);
  --shadow: 0 24px 60px rgba(40, 46, 37, .10);
  --radius: 22px;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.5;
}
button, input, select, textarea { font: inherit; }
a { color: inherit; }
button { color: inherit; }

.page-shell { min-height: 100vh; display: flex; flex-direction: column; }
.site-header, main, .site-footer { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.site-header {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 750; letter-spacing: -.02em; }
.brand-mark {
  width: 35px; height: 35px; border-radius: 50%; display: grid; place-items: center;
  color: var(--cream); background: var(--forest); font-family: var(--font-serif); font-size: 20px;
}
.main-nav { display: flex; align-items: center; gap: 20px; }
.nav-link { border: 0; background: none; padding: 8px 0; text-decoration: none; font-weight: 650; cursor: pointer; }
.nav-link:hover, .text-link:hover { color: var(--forest); }
.inline-form { display: inline; margin: 0; }
.button-link { display: inline; }
main { flex: 1; }
.site-footer {
  padding: 28px 0 34px; margin-top: 70px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 24px; color: var(--ink-soft); font-size: 14px;
}

h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--font-serif); font-weight: 500; letter-spacing: -.035em; }
h1 { font-size: clamp(44px, 7vw, 88px); line-height: .98; }
h2 { font-size: 29px; line-height: 1.08; }
.eyebrow { margin-bottom: 14px; text-transform: uppercase; letter-spacing: .13em; font-size: 12px; font-weight: 800; color: var(--forest); }
.muted { color: var(--ink-soft); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 20px;
  border: 1px solid transparent; border-radius: 999px; text-decoration: none; font-weight: 750; cursor: pointer;
  transition: transform .16s ease, background .16s ease, border-color .16s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { background: var(--forest); color: white; }
.button-primary:hover { background: var(--forest-dark); }
.button-secondary { background: transparent; color: var(--ink); border-color: var(--line); }
.button-secondary:hover { border-color: var(--forest); }
.button-dark { background: var(--ink); color: white; }
.button-small { min-height: 39px; padding-inline: 17px; font-size: 14px; }
.button-full { width: 100%; }

.hero { min-height: 640px; display: grid; grid-template-columns: 1.08fr .92fr; gap: 70px; align-items: center; padding: 72px 0; }
.hero-copy h1 { max-width: 720px; margin-bottom: 28px; }
.hero-lead { max-width: 620px; font-size: clamp(18px, 2.2vw, 23px); color: var(--ink-soft); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-shelf { position: relative; padding: 24px; }
.hero-shelf::before { content: ""; position: absolute; inset: 8% 2% -4%; border-radius: 50%; background: var(--paper-deep); z-index: -1; }
.sample-book { padding: 26px; min-height: 170px; border-radius: var(--radius); background: var(--lime); box-shadow: var(--shadow); display: flex; flex-direction: column; }
.sample-book-large { min-height: 270px; justify-content: flex-end; margin: 0 28px -12px 0; transform: rotate(-2deg); }
.sample-book strong { font-family: var(--font-serif); font-size: 29px; line-height: 1.05; font-weight: 500; margin: 8px 0; }
.sample-book span { color: var(--ink-soft); }
.sample-kicker { text-transform: uppercase; letter-spacing: .12em; font-size: 10px; font-weight: 850; }
.sample-progress { height: 7px; margin: 25px 0 9px; overflow: hidden; border-radius: 10px; background: rgba(31, 77, 58, .16); }
.sample-progress i { display: block; height: 100%; border-radius: inherit; background: var(--forest); }
.sample-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; position: relative; }
.sample-book-cream { background: var(--cream); transform: rotate(2deg); }
.sample-book-dark { background: var(--forest); color: white; transform: rotate(-1deg); }
.sample-book-dark span { color: rgba(255,255,255,.7); }
.sample-rating { color: var(--lime); letter-spacing: .1em; margin-top: auto; }
.feature-strip { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-strip article { padding: 38px 32px; border-right: 1px solid var(--line); }
.feature-strip article:first-child { padding-left: 0; }
.feature-strip article:last-child { border-right: 0; }
.feature-strip h2 { margin: 14px 0 10px; font-size: 25px; }
.feature-strip p { margin: 0; color: var(--ink-soft); }
.feature-number { color: var(--forest); font-weight: 850; font-size: 12px; }

.auth-layout { min-height: 660px; display: grid; grid-template-columns: 1fr 480px; gap: 100px; align-items: center; padding: 70px 0; }
.auth-copy h1 { max-width: 650px; font-size: clamp(47px, 6vw, 78px); }
.auth-copy > p:last-child { max-width: 500px; color: var(--ink-soft); font-size: 19px; }
.auth-card, .editor-card, .settings-card { padding: 38px; border: 1px solid rgba(24, 35, 30, .09); border-radius: var(--radius); background: var(--cream); box-shadow: var(--shadow); }
.auth-card h2 { margin-bottom: 8px; font-size: 34px; }
.stack-form { display: grid; gap: 18px; margin-top: 26px; }
label > span, fieldset legend { display: block; margin-bottom: 7px; font-size: 13px; font-weight: 750; }
input, select, textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 12px; background: #fff; color: var(--ink);
  padding: 12px 14px; outline: none; transition: border-color .15s ease, box-shadow .15s ease;
}
input, select { min-height: 47px; }
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--forest); box-shadow: 0 0 0 3px rgba(31, 77, 58, .11); }
.auth-switch { margin: 24px 0 0; text-align: center; color: var(--ink-soft); font-size: 14px; }
.auth-switch a { color: var(--forest); font-weight: 750; }
.alert { margin: 18px 0; padding: 13px 15px; border-radius: 12px; font-size: 14px; }
.alert-error { color: #782f25; background: #f5ded6; border: 1px solid rgba(163, 77, 54, .18); }

.library-head, .settings-head { padding: 70px 0 34px; display: flex; justify-content: space-between; align-items: end; gap: 40px; }
.library-head h1, .settings-head h1 { margin-bottom: 8px; font-size: clamp(52px, 7vw, 82px); }
.add-panel { position: relative; }
.add-panel summary { list-style: none; }
.add-panel summary::-webkit-details-marker { display: none; }
.add-panel[open] > summary { opacity: 0; pointer-events: none; }
.add-panel-body { position: absolute; z-index: 10; right: 0; top: 0; width: min(760px, calc(100vw - 40px)); padding: 32px; border-radius: var(--radius); background: var(--cream); box-shadow: 0 30px 90px rgba(24,35,30,.23); }
.add-panel-body::after { content: "×"; position: absolute; top: 19px; right: 24px; font-size: 25px; color: var(--ink-soft); pointer-events: none; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: rgba(255,255,255,.25); }
.stats-grid article { padding: 24px 28px; border-right: 1px solid var(--line); }
.stats-grid article:last-child { border-right: 0; }
.stats-grid span { display: block; margin-bottom: 7px; color: var(--ink-soft); font-size: 13px; }
.stats-grid strong { font-family: var(--font-serif); font-size: 36px; font-weight: 500; }
.library-content { padding-top: 32px; }
.filters { display: grid; grid-template-columns: minmax(260px, 1fr) 220px auto auto; gap: 12px; align-items: center; margin-bottom: 28px; }
.search-field input { padding-left: 18px; }
.text-link { padding: 0; border: 0; background: none; color: var(--forest); font-weight: 750; text-decoration: underline; text-decoration-color: rgba(31,77,58,.25); text-underline-offset: 4px; cursor: pointer; }
.book-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.book-card { min-height: 390px; padding: 25px; border: 1px solid var(--line); border-radius: 18px; background: var(--cream); display: flex; flex-direction: column; transition: transform .18s ease, box-shadow .18s ease; }
.book-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.book-card-top { min-height: 31px; display: flex; justify-content: space-between; gap: 10px; align-items: start; }
.status, .scope-badge { display: inline-flex; padding: 5px 9px; border-radius: 999px; font-size: 10px; font-weight: 850; text-transform: uppercase; letter-spacing: .07em; }
.status-want_to_read { background: #eee8dc; color: #6e6454; }
.status-reading { background: var(--lime); color: var(--forest-dark); }
.status-read { background: #dbe8e2; color: var(--forest-dark); }
.rating { color: #b5842e; font-size: 14px; letter-spacing: .03em; white-space: nowrap; }
.book-card-main { padding-top: 28px; flex: 1; }
.book-card h2 { margin-bottom: 8px; font-size: 30px; overflow-wrap: anywhere; }
.book-author { color: var(--ink-soft); }
.progress-block { margin-top: 26px; }
.progress-meta { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 8px; color: var(--ink-soft); font-size: 12px; }
.progress-track { height: 7px; overflow: hidden; border-radius: 10px; background: var(--paper-deep); }
.progress-track i { display: block; height: 100%; border-radius: inherit; background: var(--forest); }
.book-note { margin-top: 23px; padding-top: 19px; border-top: 1px solid var(--line); color: var(--ink-soft); font-family: var(--font-serif); font-size: 17px; font-style: italic; }
.book-meta { color: var(--ink-soft); font-size: 12px; margin: 18px 0; }
.card-actions { padding-top: 16px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; }
.danger-link { color: var(--rust); }
.empty-state { padding: 90px 20px; text-align: center; border: 1px dashed var(--line); border-radius: var(--radius); }
.empty-state h2 { margin: 18px 0 8px; }
.empty-state p { color: var(--ink-soft); }
.empty-mark { width: 56px; height: 56px; display: inline-grid; place-items: center; border-radius: 50%; background: var(--lime); font-size: 30px; }
.pagination { display: flex; align-items: center; justify-content: center; gap: 20px; margin-top: 30px; }

.book-form { margin-top: 22px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field-wide { grid-column: 1 / -1; }
.form-actions { display: flex; justify-content: flex-end; margin-top: 26px; }
.split-actions { justify-content: space-between; }
.section-heading { display: flex; justify-content: space-between; align-items: start; gap: 24px; }
.section-heading h1, .section-heading h2 { margin: 0; }
.editor-page { max-width: 840px; margin: 0 auto; padding: 50px 0; }
.back-link { display: inline-block; margin-bottom: 24px; color: var(--ink-soft); text-decoration: none; font-weight: 700; }
.editor-card { padding: 42px; }
.editor-card h1 { font-size: 48px; }

.settings-head { display: block; max-width: 780px; }
.settings-lead { max-width: 710px; color: var(--ink-soft); font-size: 19px; }
.secret-card { margin-bottom: 24px; padding: 30px; border-radius: var(--radius); background: var(--lime); box-shadow: var(--shadow); }
.secret-card h2 { margin-bottom: 8px; }
.secret-card p { margin-bottom: 0; }
.secret-row { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; margin-top: 24px; }
.secret-row code, .connection-hint code { min-width: 0; padding: 13px 15px; border-radius: 10px; background: rgba(255,255,255,.65); overflow-wrap: anywhere; }
.connection-hint { margin-top: 20px; display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; align-items: center; font-size: 13px; }
.connection-hint span { font-weight: 800; }
.settings-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 20px; align-items: start; }
.settings-card h2 { margin-bottom: 0; }
.scope-picker { margin: 0; padding: 0; border: 0; display: grid; gap: 10px; }
.scope-picker label { display: flex; gap: 12px; padding: 14px; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; }
.scope-picker input { width: 18px; min-height: auto; margin: 2px 0 0; }
.scope-picker span { margin: 0; }
.scope-picker strong, .scope-picker small { display: block; }
.scope-picker small { margin-top: 2px; color: var(--ink-soft); font-weight: 400; }
.token-list { margin-top: 20px; }
.token-item { display: flex; justify-content: space-between; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.token-item:last-child { border-bottom: 0; }
.token-title { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.scope-badge { background: var(--paper-deep); color: var(--ink-soft); }
.token-item code { display: block; color: var(--forest); }
.token-item small { display: block; margin-top: 8px; color: var(--ink-soft); }
.token-revoked { opacity: .55; }
.mini-empty { padding: 50px 0; text-align: center; color: var(--ink-soft); }
.mini-empty p { margin-bottom: 4px; font-weight: 700; color: var(--ink); }
.mcp-guide { margin-top: 24px; padding: 34px; border-radius: var(--radius); color: white; background: var(--forest); }
.mcp-guide .eyebrow { color: var(--lime); }
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 26px; }
.guide-grid article { padding-top: 18px; border-top: 1px solid rgba(255,255,255,.22); }
.guide-grid strong, .guide-grid span { display: block; }
.guide-grid span { margin-top: 6px; color: rgba(255,255,255,.68); font-size: 13px; }

.oauth-layout { min-height: 690px; display: grid; place-items: center; padding: 60px 0; }
.oauth-card { width: min(100%, 650px); padding: 46px; border: 1px solid rgba(24, 35, 30, .09); border-radius: var(--radius); background: var(--cream); box-shadow: var(--shadow); }
.oauth-card h1 { margin-bottom: 20px; font-size: clamp(42px, 6vw, 62px); }
.oauth-lead { color: var(--ink-soft); font-size: 18px; }
.oauth-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 6px; }
.oauth-note { margin: 24px 0 0; padding-top: 20px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; }

@media (max-width: 900px) {
  .hero, .auth-layout { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding-top: 55px; }
  .hero-shelf { max-width: 620px; }
  .auth-layout { padding-top: 55px; }
  .auth-copy { display: none; }
  .auth-card { width: min(100%, 520px); margin: auto; }
  .feature-strip, .stats-grid { grid-template-columns: 1fr 1fr; }
  .feature-strip article:nth-child(2), .stats-grid article:nth-child(2) { border-right: 0; }
  .feature-strip article:first-child { padding-left: 32px; }
  .feature-strip article:last-child { border-top: 1px solid var(--line); grid-column: 1 / -1; }
  .stats-grid article { border-bottom: 1px solid var(--line); }
  .stats-grid article:nth-last-child(-n+2) { border-bottom: 0; }
  .book-grid { grid-template-columns: 1fr 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-header, main, .site-footer { width: min(100% - 24px, 1180px); }
  .site-header { min-height: 68px; }
  .brand > span:last-child { display: none; }
  .main-nav { gap: 12px; }
  .main-nav .nav-link { font-size: 13px; }
  .button-small { padding-inline: 13px; }
  .hero { min-height: auto; padding: 48px 0; }
  .hero h1 { font-size: 51px; }
  .hero-shelf { padding: 10px 0; }
  .sample-book-large { margin-right: 8px; }
  .sample-row { grid-template-columns: 1fr; }
  .sample-book { min-height: 150px; }
  .feature-strip { grid-template-columns: 1fr; }
  .feature-strip article, .feature-strip article:first-child { padding: 27px 4px; border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-strip article:last-child { grid-column: auto; border-top: 0; border-bottom: 0; }
  .auth-layout { min-height: auto; padding: 40px 0; }
  .auth-card, .editor-card, .settings-card { padding: 25px; }
  .library-head { padding-top: 48px; align-items: start; }
  .library-head h1, .settings-head h1 { font-size: 54px; }
  .add-panel-body { position: fixed; inset: 12px; width: auto; overflow-y: auto; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid article { padding: 18px; }
  .filters { grid-template-columns: 1fr 1fr; }
  .search-field { grid-column: 1 / -1; }
  .book-grid { grid-template-columns: 1fr; }
  .book-card { min-height: 350px; }
  .form-grid { grid-template-columns: 1fr; }
  .field-wide { grid-column: auto; }
  .editor-page { padding-top: 30px; }
  .secret-row { grid-template-columns: 1fr; }
  .connection-hint { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .oauth-layout { min-height: auto; padding: 36px 0; }
  .oauth-card { padding: 26px; }
  .oauth-actions { flex-direction: column-reverse; }
  .oauth-actions .button { width: 100%; }
  .site-footer { flex-direction: column; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}