:root {
  --ink: #151515;
  --muted: #5f6570;
  --paper: #ffffff;
  --soft: #f7f4ec;
  --line: #ded7c8;
  --sun: #ffcf33;
  --coral: #ff6b6b;
  --mint: #55caa8;
  --ocean: #2f96d8;
  --violet: #8067d8;
  --leaf: #4b9b64;
  --font-display: 'Baloo 2', 'Trebuchet MS', Verdana, Arial, sans-serif;
  --font-body: 'Noto Sans Thai', 'Trebuchet MS', Verdana, Arial, sans-serif;
  --font-th: 'Noto Sans Thai', 'Trebuchet MS', Verdana, Arial, sans-serif;
  --font-cn: 'Noto Sans SC', 'Trebuchet MS', Verdana, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background: #fbfaf7;
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
}

button, input { font: inherit; }
button { color: inherit; }
svg { display: block; }

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: max(10px, env(safe-area-inset-top)) 22px 10px;
  background: rgba(255, 255, 255, .88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  min-width: 0;
}
.brand-mark {
  width: 42px;
  height: 42px;
  border: 3px solid var(--ink);
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--sun);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.55rem;
  box-shadow: 4px 4px 0 var(--ink);
}
.brand strong, .brand small { display: block; line-height: 1.05; }
.brand strong { font-family: var(--font-display); font-size: 1.24rem; }
.brand small { color: var(--muted); font-weight: 700; font-size: .78rem; }

.install-area { display: flex; align-items: center; gap: 10px; }
.profile-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  padding: 5px 10px 5px 6px;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--ink);
}
.profile-avatar {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--sun);
  font-family: var(--font-display);
  font-weight: 800;
}
.profile-copy { display: grid; line-height: 1.05; text-align: left; }
.profile-copy strong { font-family: var(--font-display); font-size: .94rem; }
.profile-copy small { color: var(--muted); font-family: var(--font-display); font-size: .72rem; font-weight: 800; }
.profile-button:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.sync-pill {
  min-width: 88px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: .82rem;
  font-weight: 800;
  background: #fff;
}
.soft-button, .nav-button, .source-link {
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  padding: 10px 14px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--ink);
}
.soft-button:active, .nav-button:active, .source-link:active,
.tool-button:active, .icon-button:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }

.icon-button, .tool-button {
  width: 44px;
  height: 44px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--ink);
}
.icon-button svg, .tool-button svg { width: 23px; height: 23px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.back-button { visibility: hidden; }
body.reader-open .back-button { visibility: visible; }

.library-view {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 34px 0 72px;
}
.library-head {
  min-height: calc(100svh - 220px);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr);
  align-items: center;
  gap: 34px;
  padding-bottom: 26px;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--coral);
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}
.library-head h1 {
  max-width: 720px;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6.8rem);
  line-height: .88;
}
.library-copy {
  max-width: 650px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.65;
}
.library-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.library-stats div {
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  padding: 18px;
  box-shadow: 5px 5px 0 var(--ink);
}
.library-stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
}
.library-stats span {
  color: var(--muted);
  font-family: var(--font-display);
  font-weight: 800;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}
.book-card {
  min-height: 430px;
  display: flex;
  flex-direction: column;
  border: 2px solid var(--ink);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  box-shadow: 5px 5px 0 var(--ink);
}
.book-cover {
  height: 210px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--card-a), var(--card-b));
  border-bottom: 2px solid var(--ink);
  overflow: hidden;
}
.book-cover .cover-page {
  width: 130px;
  height: 168px;
  display: grid;
  place-items: center;
  border: 3px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  box-shadow: 5px 5px 0 rgba(0,0,0,.22);
  overflow: hidden;
  padding: 8px;
}
.cover-page span {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .9rem;
  line-height: 1.05;
  text-align: center;
}
.cover-page svg { width: 96%; height: 96%; }
.cover-page img { width: 100%; height: 100%; object-fit: cover; }
.book-info { padding: 16px; display: flex; flex: 1; flex-direction: column; gap: 10px; }
.book-info h3 { margin: 0; font-family: var(--font-display); font-size: 1.25rem; line-height: 1.08; }
.book-info p { margin: 0; color: var(--muted); font-size: .92rem; font-weight: 700; line-height: 1.45; }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; }
.meta-row span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 9px;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 800;
}
.progress-track {
  height: 11px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  overflow: hidden;
  background: #fff;
}
.progress-track i { display: block; height: 100%; width: 0; background: var(--card-b); }
.card-actions { margin-top: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.card-actions button {
  min-height: 42px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  font-weight: 800;
  cursor: pointer;
}
.card-actions .primary { background: var(--sun); }

.reader-view {
  flex: 1;
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr);
}
.reader-rail {
  position: sticky;
  top: 72px;
  height: calc(100vh - 72px);
  overflow: auto;
  padding: 18px;
  border-right: 1px solid var(--line);
  background: #fff;
}
.reader-title span {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--coral);
  font-family: var(--font-display);
  font-size: .76rem;
  font-weight: 800;
}
.reader-title h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.05;
}
.reader-title p { margin: 8px 0 0; color: var(--muted); font-weight: 800; }
.tool-group { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.tool-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.segmented { display: grid; grid-template-columns: repeat(3, 1fr); }
.segmented .tool-button { width: 100%; }
.tool-button.active { background: var(--sun); }
.palette {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 12px;
}
.color-swatch {
  aspect-ratio: 1;
  border: 2px solid var(--ink);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: inset 0 0 0 3px rgba(255,255,255,.45);
}
.color-swatch.active { outline: 4px solid var(--sun); outline-offset: 2px; }
.slider-label {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  color: var(--muted);
  font-family: var(--font-display);
  font-weight: 800;
}
.slider-label input, .page-controls input { width: 100%; accent-color: var(--coral); }
.page-controls { display: grid; gap: 12px; }
.page-controls .nav-button, .source-link { text-align: center; }

.reader-stage-wrap {
  overflow: auto;
  background:
    linear-gradient(90deg, rgba(21,21,21,.05) 1px, transparent 1px),
    linear-gradient(rgba(21,21,21,.05) 1px, transparent 1px),
    #ebe8df;
  background-size: 28px 28px;
  display: grid;
  place-items: start center;
  padding: 26px;
}
.reader-stage {
  position: relative;
  width: min(100%, calc(8.5in * var(--zoom, 1)));
  min-height: calc(11in * var(--zoom, 1));
  transform-origin: top center;
}
.page-host { position: relative; z-index: 1; width: 100%; transform-origin: top center; }
.page-host .page {
  width: 100%;
  min-height: calc(11in * var(--zoom, 1));
  display: flex;
  background: #fff;
  box-shadow: 0 12px 35px rgba(0,0,0,.22);
  border-radius: 8px;
}
.page-host .toolbar, .page-host .no-print { display: none !important; }
.page-host svg { max-width: 100%; }
#drawCanvas {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  touch-action: none;
  pointer-events: auto;
}
body.image-reader .page-host {
  z-index: 1;
  pointer-events: none;
}
body.image-reader #drawCanvas {
  z-index: 3;
  background: #fff;
  border-radius: 8px;
}
.loading-card {
  position: absolute;
  inset: 40px;
  z-index: 2;
  display: grid;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  box-shadow: 5px 5px 0 var(--ink);
}
.loading-card[hidden] { display: none; }


.user-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: max(18px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
  background: rgba(21,21,21,.32);
}
.user-modal[hidden] { display: none; }
.user-dialog {
  width: min(480px, 100%);
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  padding: 18px;
  box-shadow: 7px 7px 0 var(--ink);
}
.user-dialog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}
.user-dialog h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1;
}
.user-list {
  display: grid;
  gap: 10px;
}
.user-card {
  width: 100%;
  min-height: 62px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  padding: 10px;
  text-align: left;
  cursor: pointer;
}
.user-card.active { background: #fff6c8; }
.user-card strong, .user-card small { display: block; }
.user-card strong { font-family: var(--font-display); font-size: 1.05rem; }
.user-card small { color: var(--muted); font-weight: 800; }
.add-user-button {
  width: 100%;
  margin-top: 14px;
  background: var(--sun);
}
@media (max-width: 920px) {
  .topbar { height: auto; min-height: 64px; padding: max(8px, env(safe-area-inset-top)) 12px 8px; }
  .brand small, .sync-pill, .profile-copy small { display: none; }
  .install-area { gap: 8px; }
  .profile-button { min-height: 44px; padding-right: 8px; }
  .library-view { width: min(100% - 24px, 760px); padding-top: 18px; }
  .library-head { min-height: auto; grid-template-columns: 1fr; padding: 28px 0; }
  .library-stats { grid-template-columns: repeat(3, 1fr); }
  .library-stats div { padding: 12px; }
  .reader-view {
    display: flex;
    flex-direction: column;
    min-height: calc(100svh - 64px);
  }
  .reader-stage-wrap {
    order: 1;
    min-height: calc(100svh - 64px);
    padding: 10px;
    align-items: start;
  }
  .reader-stage {
    width: min(100%, calc((100svh - 88px) * .7727));
    min-height: calc((min(100vw - 20px, (100svh - 88px) * .7727)) * 1.2941);
  }
  .reader-rail {
    order: 2;
    position: static;
    z-index: 12;
    height: auto;
    border-right: 0;
    border-top: 1px solid var(--line);
    border-bottom: 0;
    padding: 12px;
  }
  .reader-title h2 { font-size: 1.05rem; }
  .reader-title p { font-size: .82rem; }
  .tool-group { margin-top: 10px; padding-top: 10px; }
  .palette { grid-template-columns: repeat(10, 1fr); }
  .reader-stage-wrap { padding: 10px; }
}

@media (max-width: 560px) {
  .library-head h1 { font-size: 3.2rem; }
  .library-stats { grid-template-columns: 1fr; }
  .book-grid { grid-template-columns: 1fr; }
  .card-actions { grid-template-columns: 1fr; }
  .palette { grid-template-columns: repeat(8, 1fr); }
  .tool-button, .icon-button { width: 40px; height: 40px; }
  .profile-copy { display: none; }
}

@media print {
  .topbar, .reader-rail, #drawCanvas, .library-view { display: none !important; }
  .reader-view { display: block !important; }
  .reader-stage-wrap { padding: 0; background: #fff; overflow: visible; display: block; }
  .reader-stage, .page-host { width: 8.5in !important; min-height: 11in !important; }
  .page-host .page { box-shadow: none; border-radius: 0; width: 8.5in !important; height: 11in !important; }
}