/* ═══════════════════════════════════════════
   PHASE 1.4 — CSS CUSTOM PROPERTIES
   All design tokens in :root and html.dark
════════════════════════════════════════════ */
:root {
  --paper-cream: #f7f3ea;
  --paper-ruled: #faf9f5;
  --paper-shadow: rgba(80, 60, 20, 0.13);
  --ink-navy: #1c2340;
  --ink-default: #1c2340;
  --sidebar-bg: rgba(247, 243, 234, 0.72);
  --sidebar-border: rgba(180, 160, 110, 0.25);
  --app-bg: #ede8dc;
  --toolbar-bg: rgba(247, 243, 234, 0.88);
  --text-primary: #1c2340;
  --text-secondary: #6b6148;
  --text-muted: #9e9078;
  --accent: #c0622a;
  --accent-light: #f0e0d4;
  --btn-bg: rgba(255, 255, 255, 0.6);
  --btn-border: rgba(180, 160, 110, 0.35);
  --btn-hover: rgba(192, 98, 42, 0.1);
  --input-bg: rgba(255, 255, 255, 0.55);
  --input-border: rgba(180, 160, 110, 0.3);
  --scrollbar: rgba(180, 160, 110, 0.3);
  --font-ui: 'Crimson Pro', Georgia, serif;
  --font-canvas: 'Caveat', cursive;
  --transition: all 0.22s cubic-bezier(.4, 0, .2, 1);
  --radius: 10px;
  --radius-lg: 16px;
}

html.dark {
  --paper-cream: #1e1e2e;
  --paper-ruled: #1a1a2a;
  --paper-shadow: rgba(0, 0, 0, 0.4);
  --ink-navy: #e8e0d0;
  --ink-default: #e8e0d0;
  --sidebar-bg: rgba(20, 20, 35, 0.82);
  --sidebar-border: rgba(80, 80, 120, 0.3);
  --app-bg: #12121e;
  --toolbar-bg: rgba(20, 20, 35, 0.92);
  --text-primary: #e8e4d8;
  --text-secondary: #9890a8;
  --text-muted: #6a6278;
  --accent: #e08050;
  --accent-light: rgba(224, 128, 80, 0.12);
  --btn-bg: rgba(40, 40, 60, 0.6);
  --btn-border: rgba(80, 80, 120, 0.35);
  --btn-hover: rgba(224, 128, 80, 0.12);
  --input-bg: rgba(30, 30, 50, 0.6);
  --input-border: rgba(80, 80, 120, 0.35);
  --scrollbar: rgba(80, 80, 120, 0.3);
}

/* ═══════════════════════════════════════════
   BASE RESET & GLOBAL
════════════════════════════════════════════ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-ui);
  font-size: 16px;
  color: var(--text-primary);
  background: var(--app-bg);
  transition: background 0.3s, color 0.3s;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  overflow: hidden;
}

::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border-radius: 4px;
}

/* ═══════════════════════════════════════════
   PHASE 2.5 — TOP TOOLBAR
════════════════════════════════════════════ */
#toolbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--toolbar-bg);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--sidebar-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 12px;
  z-index: 100;
  transition: var(--transition);
}

.autosave-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 12px;
  transition: all 0.25s ease;
  user-select: none;
  margin-right: 4px;
}

.autosave-badge.saving {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-light);
}

.autosave-badge.saved {
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.08);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-ui);
  font-size: 22px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-right: 8px;
  flex-shrink: 0;
  user-select: none;
  cursor: pointer;
}

.logo-img-wrapper {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border: 1.5px solid rgba(211, 97, 53, 0.4);
  box-shadow: 0 3px 12px rgba(211, 97, 53, 0.22), 0 0 0 1px rgba(255, 255, 255, 0.8) inset;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.35s ease, border-color 0.35s ease;
  flex-shrink: 0;
}

.logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.18);
  transition: transform 0.35s ease;
}

.logo:hover .logo-img-wrapper {
  transform: scale(1.12) rotate(-6deg);
  border-color: #d36135;
  box-shadow: 0 5px 16px rgba(211, 97, 53, 0.38), 0 0 0 2px rgba(211, 97, 53, 0.15);
}

.logo:hover .logo-img {
  transform: scale(1.26);
}

.logo-text {
  display: inline-flex;
  align-items: center;
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.logo-text span {
  color: #d36135;
  font-weight: 600;
}

.dark .logo-img-wrapper {
  background: #ffffff;
  border-color: rgba(211, 97, 53, 0.6);
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.2) inset;
}

.toolbar-spacer {
  flex: 1;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ═══════════════════════════════════════════
   SHARED BUTTON STYLES
════════════════════════════════════════════ */
.btn {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-primary);
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: var(--radius);
  padding: 7px 14px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  backdrop-filter: blur(8px);
}

.btn:hover {
  background: var(--btn-hover);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn.accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn.accent:hover {
  opacity: 0.88;
  color: #fff;
  transform: translateY(-1px);
}

.btn.sm {
  font-size: 12px;
  padding: 5px 10px;
}

.btn.link-btn {
  background: transparent;
  border: none;
  color: var(--accent);
  text-decoration: underline;
  padding: 0;
  margin-left: 8px;
  cursor: pointer;
  font-weight: 500;
  backdrop-filter: none;
}

.btn.link-btn:hover {
  color: var(--accent);
  background: transparent;
  transform: scale(1.05);
}

.btn.icon-btn {
  padding: 7px 10px;
  min-width: 36px;
  justify-content: center;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

/* ═══════════════════════════════════════════
   PHASE 2.1 — TWO-COLUMN LAYOUT
════════════════════════════════════════════ */
#app {
  display: grid;
  grid-template-columns: 300px 1fr;
  height: 100vh;
  padding-top: 56px;
}

/* ═══════════════════════════════════════════
   PHASE 2.2 — GLASSMORPHISM SIDEBAR
════════════════════════════════════════════ */
#sidebar {
  background: var(--sidebar-bg);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-right: 1px solid var(--sidebar-border);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px 0 40px;
  transition: var(--transition);
}

/* Phase 2.3 — Sidebar sections */
.sb-section {
  border-bottom: 1px solid var(--sidebar-border);
  overflow: hidden;
}

.sb-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  user-select: none;
  transition: var(--transition);
}

.sb-section-header:hover {
  color: var(--accent);
}

.sb-arrow {
  font-size: 10px;
  transition: transform 0.22s ease;
  color: var(--text-muted);
}

.sb-section.collapsed .sb-arrow {
  transform: rotate(-90deg);
}

.sb-body {
  padding: 4px 18px 16px;
  max-height: 600px;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(.4, 0, .2, 1), padding 0.22s ease;
}

.sb-section.collapsed .sb-body {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
}

/* Sidebar form elements */
.sb-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  margin-top: 12px;
}

.sb-label:first-child {
  margin-top: 4px;
}

.sb-label .val {
  color: var(--accent);
  font-weight: 600;
}

input[type=range] {
  width: 100%;
  height: 3px;
  -webkit-appearance: none;
  background: var(--input-border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 0 3px var(--accent-light);
}

input[type=range]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

input[type=text],
input[type=password],
textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 13px;
  padding: 8px 10px;
  outline: none;
  transition: var(--transition);
  resize: none;
}

input[type=text]:focus,
input[type=password]:focus,
textarea:focus {
  border-color: var(--accent);
  background: var(--input-bg);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.sb-checkbox-label {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.sb-checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
  margin: 0;
  flex-shrink: 0;
}

input[type=color] {
  -webkit-appearance: none;
  width: 32px;
  height: 32px;
  border: 1px solid var(--btn-border);
  border-radius: 6px;
  padding: 2px;
  cursor: pointer;
  background: var(--input-bg);
}

select {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 13px;
  padding: 8px 10px;
  outline: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-ui);
}

select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

select:hover {
  border-color: var(--accent);
}

.color-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-row input[type=color] {
  flex-shrink: 0;
}

.color-row span {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Paper style buttons grid */
.paper-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 4px;
}

.paper-btn {
  font-family: var(--font-ui);
  font-size: 11px;
  padding: 6px 4px;
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  text-align: center;
}

.paper-btn:hover,
.paper-btn.active {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

/* AI feature buttons */
.ai-btn-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
}

/* Export buttons */
.export-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
  margin-top: 4px;
}

/* Export toast notification */
.export-toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(calc(-50% + 150px));
  padding: 10px 20px;
  border-radius: 40px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  backdrop-filter: blur(16px);
  border: 1px solid transparent;
  z-index: 9999;
  pointer-events: none;
  transition: opacity 0.35s ease;
  white-space: nowrap;
}

.export-toast--info {
  background: var(--toolbar-bg);
  border-color: var(--sidebar-border);
  color: var(--text-secondary);
}

.export-toast--success {
  background: rgba(40, 180, 100, 0.18);
  border-color: rgba(40, 180, 100, 0.35);
  color: #1a8a50;
}

.export-toast--warn {
  background: rgba(200, 150, 20, 0.16);
  border-color: rgba(200, 150, 20, 0.35);
  color: #8a6010;
}

.export-toast--error {
  background: rgba(220, 60, 60, 0.16);
  border-color: rgba(220, 60, 60, 0.35);
  color: #b02020;
}

html.dark .export-toast--success { color: #4ecf88; }
html.dark .export-toast--warn    { color: #d4aa44; }
html.dark .export-toast--error   { color: #f07070; }

@media (max-width: 768px) {
  .export-toast { transform: translateX(-50%); }
}


/* Spinner */
.spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ═══════════════════════════════════════════
   PHASE 2.4 — CANVAS AREA
════════════════════════════════════════════ */
#canvas-area {
  background: var(--app-bg);
  overflow-y: auto;
  overflow-x: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px 80px;
  gap: 24px;
  position: relative;
  transition: background 0.3s;
}

/* Subtle dot pattern background */
#canvas-area::before {
  content: '';
  position: fixed;
  top: 56px;
  left: 300px;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(circle, var(--sidebar-border) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  opacity: 0.5;
  z-index: 0;
}

#page-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  position: relative;
  z-index: 1;
  padding-bottom: 90px;
}

.page-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-right: 0;
}

.worksheet-header {
  position: absolute;
  top: 4px;
  right: 8px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0px;
  z-index: 3;
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  pointer-events: auto;
}

.worksheet-field-row {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 18px;
}

.worksheet-label {
  display: none;
}

.worksheet-input-box {
  width: 80px;
  height: 18px;
  border: none;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: transparent;
  font-family: var(--font-canvas);
  font-size: 11px;
  font-style: italic;
  line-height: 1.2;
  padding: 1px 4px;
  outline: none;
  caret-color: var(--ink-navy);
}

.worksheet-input-box::placeholder {
  color: transparent;
}

.worksheet-input-box:focus {
  color: var(--ink-navy);
  border: none;
  box-shadow: none;
  background: rgba(255, 255, 255, 0.25);
}

.worksheet-input-box:focus::placeholder {
  color: rgba(0, 0, 0, 0.2);
}

.page-label {
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.06em;
}

.canvas-container {
  position: relative;
  display: inline-block;
  box-shadow: 0 4px 24px var(--paper-shadow), 0 1px 4px rgba(0, 0, 0, 0.06);
  border-radius: 2px;
  max-width: 100%;
}

.canvas-page {
  display: block;
  max-width: 100%;
}

.page-editor {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  border: none;
  outline: none;
  background: transparent;
  color: transparent;
  caret-color: var(--ink-default, #1c2340);
  text-align: left;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow: hidden;
  box-sizing: border-box;
  cursor: text;
  user-select: text;
  -webkit-user-select: text;
  border-radius: 2px;
  transition: box-shadow 0.2s ease;
}

/* Left Margin Text Overlay */
.margin-text-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 80px;
  height: 100%;
  padding: 0;
  z-index: 3;
  border: none;
  outline: none;
  background: transparent;
  color: transparent;
  font-family: var(--font-canvas);
  font-size: 22px;
  font-style: normal;
  text-align: left;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow: hidden;
  box-sizing: border-box;
  cursor: text;
  user-select: text;
  -webkit-user-select: text;
  caret-color: var(--ink-default);
  line-height: 1.5;
  opacity: 1;
}

.margin-text-overlay:focus {
  outline: none;
  opacity: 1;
}

html.dark .margin-text-overlay {
  color: var(--ink-default);
  caret-color: var(--ink-default);
}

.page-editor:focus {
  box-shadow: inset 0 0 0 2px rgba(192, 98, 42, 0.35);
}

html.dark .page-editor {
  caret-color: #e8e0d0;
}

html.dark .page-editor:focus {
  box-shadow: inset 0 0 0 2px rgba(224, 128, 80, 0.4);
}


/* Pen cursor overlay */
#pen-cursor {
  position: fixed;
  width: 22px;
  height: 22px;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-4px, -20px);
  display: none;
}

/* ═══════════════════════════════════════════
   PHASE 8.5 — PAGE NAVIGATION
════════════════════════════════════════════ */
#page-nav {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(calc(-50% + 150px));
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--toolbar-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--sidebar-border);
  border-radius: 40px;
  padding: 8px 16px;
  z-index: 50;
  transition: var(--transition);
}

#page-indicator {
  font-size: 13px;
  color: var(--text-secondary);
  min-width: 70px;
  text-align: center;
}

/* ═══════════════════════════════════════════
   PHASE 2.6 — DARK MODE
════════════════════════════════════════════ */
.dark-toggle {
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 40px;
  padding: 5px 12px;
  cursor: pointer;
  font-size: 16px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}

.dark-toggle:hover {
  border-color: var(--accent);
}

/* ═══════════════════════════════════════════
   PHASE 2.7 — RESPONSIVE MOBILE
════════════════════════════════════════════ */
#hamburger {
  display: none;
}

@media (max-width: 768px) {
  #app {
    grid-template-columns: 1fr;
  }

  #sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    bottom: 0;
    width: 300px;
    z-index: 90;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(.4, 0, .2, 1);
  }

  #sidebar.open {
    transform: translateX(0);
  }

  #hamburger {
    display: flex;
  }

  #canvas-area {
    padding: 16px 8px 80px;
  }

  #canvas-area::before {
    left: 0;
  }

  #page-nav {
    transform: translateX(-50%);
  }
}

/* ═══════════════════════════════════════════
   ANIMATIONS & TRANSITIONS
════════════════════════════════════════════ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-wrapper {
  animation: fadeIn 0.35s ease forwards;
}

/* AI status bar */
#ai-status {
  font-size: 12px;
  color: var(--accent);
  text-align: center;
  padding: 4px 0;
  min-height: 20px;
  font-style: italic;
}

/* Text input area */
#text-input {
  width: 100%;
  min-height: 120px;
  font-family: 'Caveat', cursive;
  font-size: 17px;
  line-height: 1.5;
  resize: vertical;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#text-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* Divider */
.sb-divider {
  height: 1px;
  background: var(--sidebar-border);
  margin: 8px 0;
}

/* Vertical Alignment Selector */
.alignment-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 8px;
  margin-bottom: 12px;
}

.align-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-ui);
  font-size: 10px;
  color: var(--text-secondary);
}

.align-btn:hover {
  background: var(--btn-hover);
  border-color: var(--accent);
}

.align-btn.active {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.align-preview {
  width: 100%;
  height: 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  padding: 2px 0;
}

.align-line {
  width: 100%;
  height: 1px;
  background: var(--sidebar-border);
}

.align-text {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1;
}

.align-text.align-top {
  top: 1px;
}

.align-text.align-middle {
  top: 50%;
  transform: translate(-50%, -50%);
}

.align-text.align-bottom {
  bottom: 5px;
}

/* Print styles */
@media print {
  #toolbar,
  #sidebar,
  #page-nav {
    display: none !important;
  }

  #app {
    display: block;
    padding: 0;
  }

  #canvas-area {
    overflow: visible;
    padding: 0;
  }

  #canvas-area::before {
    display: none;
  }

  .page-label {
    display: none;
  }

  .canvas-page {
    page-break-after: always;
    box-shadow: none;
  }
}

/* ───────────────────────────────────────────
   FILE UPLOAD DROP ZONE
─────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--sidebar-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
}

html.dark .drop-zone {
  background: rgba(0, 0, 0, 0.2);
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--accent);
  background: var(--btn-hover-bg);
}

.drop-icon {
  font-size: 22px;
  color: var(--accent);
  margin-bottom: 2px;
}

.drop-text {
  font-size: 12px;
  color: var(--text-secondary);
}

.browse-link {
  color: var(--accent);
  text-decoration: underline;
  font-weight: 600;
}

.drop-formats {
  font-size: 10px;
  color: var(--text-muted);
}

.upload-status {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  color: var(--accent);
  font-style: italic;
}

.upload-status .spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--accent);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ───────────────────────────────────────────
   HANDFONTED STUDIO MODAL CSS STYLE
─────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-card {
  background: rgba(253, 251, 245, 0.95);
  border: 1px solid rgba(139, 90, 43, 0.15);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  border-radius: 16px;
  width: 750px;
  max-width: 90vw;
  max-height: 90vh;
  padding: 24px;
  display: flex;
  flex-direction: column;
  color: var(--text-main);
  transition: transform 0.3s ease;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Modal scrollbar styling */
.modal-card::-webkit-scrollbar {
  width: 8px;
}

.modal-card::-webkit-scrollbar-track {
  background: rgba(0,0,0,0.05);
  border-radius: 4px;
}

.modal-card::-webkit-scrollbar-thumb {
  background: rgba(192, 98, 42, 0.3);
  border-radius: 4px;
}

.modal-card::-webkit-scrollbar-thumb:hover {
  background: rgba(192, 98, 42, 0.5);
}

.modal-overlay.hidden .modal-card {
  transform: scale(0.95);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.modal-header h3 {
  font-family: 'Playfair Display', serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--text-muted);
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--accent);
}

.modal-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid rgba(0,0,0,0.1);
  margin-bottom: 16px;
}

.tab-btn {
  background: none;
  border: none;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.tab-btn:hover {
  color: var(--accent);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.sheet-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
}

.sheet-tab {
  flex: 1;
  font-family: var(--font-ui);
  font-size: 11px;
  padding: 6px 4px;
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  text-align: center;
}

.sheet-tab:hover,
.sheet-tab.active {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

/* Font Progress Bar */
.font-progress-bar {
  margin-bottom: 16px;
  padding: 12px;
  background: rgba(0,0,0,0.02);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 8px;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.progress-label strong {
  color: var(--accent);
  font-weight: 600;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: rgba(0,0,0,0.08);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #e08050);
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* Brush Size Control */
.brush-control {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  padding: 10px;
  background: rgba(0,0,0,0.02);
  border-radius: 6px;
  width: 100%;
}

.brush-label {
  font-size: 12px;
  color: var(--text-secondary);
  min-width: 110px;
  white-space: nowrap;
}

#brush-size-val {
  color: var(--accent);
  font-weight: 600;
}

#brush-size-slider {
  flex: 1;
}

/* Character Preview */
.char-preview {
  margin-top: 12px;
  padding: 10px;
  background: rgba(0,0,0,0.02);
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.preview-label {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 600;
}

#char-preview-canvas {
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: 4px;
  background: white;
}

/* Project Save/Load Actions */
.project-actions {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(0,0,0,0.08);
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.sketch-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  width: 100%;
  justify-content: center;
}

.sketch-actions .btn {
  flex: 1;
  max-width: 200px;
}

.tab-panel.hidden {
  display: none !important;
}

.modal-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.4;
}

/* Sketch Container Styles */
.sketch-container {
  display: flex;
  gap: 20px;
  min-height: 400px;
  max-height: 500px;
}

.sketch-sidebar {
  width: 240px;
  display: flex;
  flex-direction: column;
  background: rgba(0,0,0,0.02);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 8px;
  padding: 10px;
  flex-shrink: 0;
}

.char-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 5px;
  overflow-y: auto;
  flex: 1;
  padding-right: 4px;
  max-height: 350px;
}

.char-grid::-webkit-scrollbar {
  width: 4px;
}

.char-grid::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.15);
  border-radius: 2px;
}

.char-btn {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 4px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.char-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.char-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.char-btn.drafted {
  border-color: rgba(230, 100, 50, 0.4);
  background: rgba(230, 100, 50, 0.08);
}

.sketch-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-width: 0;
}

.sketch-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  flex-wrap: wrap;
  gap: 8px;
}

.sketch-header-actions {
  display: flex;
  gap: 4px;
}

.canvas-wrapper {
  position: relative;
  width: 258px;
  height: 258px;
  background: white;
  border: 1px solid rgba(0,0,0,0.12);
  border-radius: 8px;
  box-shadow: inset 0 2px 5px rgba(0,0,0,0.04);
  overflow: hidden;
  cursor: crosshair;
}

#sketch-canvas {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  background: transparent;
}

#canvas-guide-letter {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 140px;
  color: rgba(0, 0, 0, 0.05);
  font-family: serif;
  user-select: none;
  pointer-events: none;
  z-index: 1;
}

/* Aligner Panel Styles */
.template-upload-zone {
  border: 2px dashed rgba(139, 90, 43, 0.25);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  cursor: pointer;
  background: rgba(0,0,0,0.01);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.template-upload-zone:hover {
  background: rgba(139, 90, 43, 0.03);
  border-color: var(--accent);
}

.aligner-layout {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-top: 16px;
}

.aligner-canvas-wrapper {
  background: rgba(0,0,0,0.03);
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: 8px;
  overflow: hidden;
  width: 360px;
  height: 360px;
  flex-shrink: 0;
}

#aligner-canvas {
  display: block;
}

.aligner-controls {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.control-group label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.control-group input[type="range"] {
  width: 100%;
}

/* Dark Mode Compatibility overrides */
.dark .modal-card {
  background: rgba(32, 28, 24, 0.96);
  border-color: rgba(255,255,255,0.08);
  box-shadow: 0 25px 50px rgba(0,0,0,0.5);
}

.dark .char-btn {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
  color: var(--text-secondary);
}

.dark .char-btn:hover {
  color: var(--accent);
}

.dark .char-btn.drafted {
  background: rgba(230, 100, 50, 0.15);
}

.dark #canvas-guide-letter {
  color: rgba(255,255,255,0.04);
}

.dark .canvas-wrapper {
  background: #1e1e1e;
  border-color: rgba(255,255,255,0.1);
}

.dark .sketch-sidebar {
  background: rgba(255,255,255,0.02);
  border-color: rgba(255,255,255,0.06);
}

.dark .modal-tabs {
  border-bottom-color: rgba(255,255,255,0.08);
}

.dark .modal-footer {
  border-top-color: rgba(255,255,255,0.08) !important;
}

.dark #custom-font-name {
  background: rgba(255,255,255,0.05) !important;
  color: white;
  border-color: rgba(255,255,255,0.15) !important;
}

/* ═══════════════════════════════════════════
   RESPONSIVE DESIGN — HANDFONTED STUDIO
════════════════════════════════════════════ */

/* Large Desktop (1920px+) */
@media (min-width: 1920px) {
  .modal-card {
    width: 950px;
    padding: 32px;
  }
  
  .sketch-container {
    min-height: 450px;
    max-height: 550px;
  }
  
  .canvas-wrapper {
    width: 320px;
    height: 320px;
  }
  
  #sketch-canvas {
    width: 320px;
    height: 320px;
  }
  
  .sketch-sidebar {
    width: 260px;
  }
  
  .char-grid {
    grid-template-columns: repeat(7, 1fr);
  }
}

/* Standard Desktop (1024px - 1919px) */
@media (min-width: 1024px) and (max-width: 1919px) {
  .modal-card {
    width: 750px;
  }
}

/* Tablet Landscape (768px - 1023px) */
@media (max-width: 1023px) and (min-width: 768px) {
  .modal-card {
    width: 95vw;
    max-height: 85vh;
    padding: 20px;
    overflow-y: auto;
  }
  
  .sketch-container {
    height: auto;
    flex-direction: column;
    gap: 16px;
  }
  
  .sketch-sidebar {
    width: 100%;
    max-height: 200px;
  }
  
  .char-grid {
    grid-template-columns: repeat(10, 1fr);
    max-height: 140px;
  }
  
  .canvas-wrapper {
    width: 280px;
    height: 280px;
  }
  
  #sketch-canvas {
    width: 280px;
    height: 280px;
  }
  
  .aligner-layout {
    flex-direction: column;
  }
  
  .aligner-canvas-wrapper {
    width: 100%;
    max-width: 400px;
  }
}

/* Tablet Portrait & Large Mobile (481px - 767px) */
@media (max-width: 767px) and (min-width: 481px) {
  .modal-card {
    width: 95vw;
    max-height: 90vh;
    padding: 16px;
    overflow-y: auto;
  }
  
  .modal-header h3 {
    font-size: 18px;
  }
  
  .sketch-container {
    height: auto;
    flex-direction: column;
    gap: 12px;
  }
  
  .sketch-sidebar {
    width: 100%;
    max-height: 180px;
    padding: 8px;
  }
  
  .char-grid {
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
    max-height: 120px;
  }
  
  .canvas-wrapper {
    width: 240px;
    height: 240px;
  }
  
  #sketch-canvas {
    width: 240px;
    height: 240px;
  }
  
  .sketch-actions,
  .project-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .template-actions {
    flex-direction: column !important;
  }
  
  .aligner-layout {
    flex-direction: column;
  }
  
  .modal-footer-styled {
    flex-direction: column;
    gap: 12px;
  }
  
  #custom-font-name {
    width: 100% !important;
  }
}

/* Mobile (320px - 480px) */
@media (max-width: 480px) {
  .modal-card {
    width: 100vw;
    max-width: 100vw;
    max-height: 100vh;
    height: 100vh;
    padding: 12px;
    border-radius: 0;
    overflow-y: auto;
  }
  
  .modal-header h3 {
    font-size: 16px;
  }
  
  .tab-btn {
    padding: 8px 8px;
    font-size: 11px;
    flex: 1;
  }
  
  .sketch-container {
    height: auto;
    flex-direction: column;
    gap: 10px;
  }
  
  .sketch-sidebar {
    width: 100%;
    max-height: 150px;
    padding: 6px;
  }
  
  .char-grid {
    grid-template-columns: repeat(8, 1fr);
    gap: 3px;
    max-height: 100px;
  }
  
  .char-btn {
    height: 28px;
    font-size: 9px;
  }
  
  .sketch-header {
    flex-direction: column;
    gap: 6px;
    align-items: stretch;
  }
  
  .canvas-wrapper {
    width: 100%;
    max-width: 280px;
    height: auto;
    aspect-ratio: 1;
  }
  
  #sketch-canvas {
    width: 100%;
    height: 100%;
  }
  
  .sketch-actions,
  .project-actions {
    flex-direction: column;
    width: 100%;
    gap: 6px;
  }
  
  .sketch-actions .btn,
  .project-actions .btn,
  #btn-build-font {
    width: 100%;
  }
  
  .template-actions {
    flex-direction: column !important;
    gap: 8px !important;
  }
  
  .aligner-layout {
    flex-direction: column;
  }
  
  .modal-footer-styled {
    flex-direction: column;
    gap: 10px;
  }
  
  .font-name-input-group {
    width: 100%;
    flex-direction: column;
  }
  
  #custom-font-name {
    width: 100% !important;
  }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
  .char-btn {
    min-height: 36px;
    min-width: 36px;
  }
  
  .btn {
    min-height: 44px;
  }
  
  input[type="range"]::-webkit-slider-thumb {
    width: 20px;
    height: 20px;
  }
}

/* ───────────────────────────────────────────
   ACCESSIBILITY & CLEANUP STYLES
─────────────────────────────────────────── */
#page-indicator-toolbar {
  font-size: 12px;
  color: var(--text-muted);
}
.action-buttons-row {
  margin-top: 8px;
  display: flex;
  gap: 6px;
}
.btn-render, .btn-start {
  flex: 1;
}
.file-upload-wrapper {
  margin-top: 12px;
}
#file-upload, #template-image-input {
  display: none;
}
#upload-status {
  display: none;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}
.status-text-row {
  display: flex;
  align-items: center;
}
#progress-container {
  display: none;
  width: 100%;
  height: 4px;
  background: rgba(0,0,0,0.1);
  border-radius: 2px;
  overflow: hidden;
}
#progress-bar {
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width 0.2s ease;
}
.font-caveat { font-family: Caveat; }
.font-indie-flower { font-family: 'Indie Flower'; }
.font-shadows-into-light { font-family: 'Shadows Into Light'; }
.font-patrick-hand { font-family: 'Patrick Hand'; }
.font-kalam { font-family: 'Kalam'; }
.font-amita { font-family: 'Amita'; }
.font-noto-sans-devanagari { font-family: 'Noto Sans Devanagari'; }
.font-noto-serif-devanagari { font-family: 'Noto Serif Devanagari'; }
.font-hind { font-family: 'Hind'; }
.font-tiro-devanagari { font-family: 'Tiro Devanagari Hindi'; }
.font-baloo-2 { font-family: 'Baloo 2'; }
.font-martel { font-family: 'Martel'; }
.font-roboto { font-family: 'Roboto', sans-serif; }
.font-arial { font-family: 'Arial', sans-serif; }

#font-upload {
  font-size: 11px;
  color: var(--text-secondary);
  width: 100%;
}
#btn-handfonted-studio, #btn-reset-defaults {
  width: 100%;
  font-size: 11px;
}
#btn-handfonted-studio {
  margin-top: 10px;
}
#btn-reset-defaults {
  margin-top: 14px;
}
.ink-presets-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.sb-label-mt { margin-top: 12px; }
.sb-label-sm { margin-top: 8px; }
.animation-buttons-row {
  margin-top: 10px;
  display: flex;
  gap: 6px;
}
.sketch-actions, .template-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}
.sketch-actions {
  margin-top: 12px;
}
.template-actions {
  margin-bottom: 12px;
}
#btn-save-char {
  flex: 1;
}
.template-upload-icon {
  font-size: 24px;
  color: var(--accent);
  margin-bottom: 8px;
}
#template-aligner-container {
  margin-top: 16px;
}
.modal-footer-styled {
  margin-top: 20px;
  border-top: 1px solid rgba(0,0,0,0.1);
  padding-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.font-name-input-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.font-name-label {
  font-size: 12px;
  color: var(--text-secondary);
}
#custom-font-name {
  width: 140px;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid rgba(0,0,0,0.15);
  background: rgba(255,255,255,0.7);
}
#font-build-progress {
  margin-top: 12px;
  padding: 10px;
  border-radius: 6px;
  background: rgba(230,100,50,0.1);
  text-align: center;
}
.spinner-inline {
  display: inline-block;
  margin-right: 8px;
  width: 16px;
  height: 16px;
  border-width: 2px;
  border-top-color: var(--accent);
}
#font-build-status-text {
  font-size: 12px;
  color: var(--accent);
}

/* Note: Study Mode Layout consolidated at the end of the file */

/* ═══════════════════════════════════════════
   STUDY FLASHCARDS MODAL
════════════════════════════════════════════ */
.flashcard-container {
  width: 100%;
  height: 250px;
  perspective: 1000px;
  cursor: pointer;
  margin-top: 10px;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
  border-radius: var(--radius-lg);
}

.flashcard-inner.flipped {
  transform: rotateY(180deg);
}

.flashcard-front, .flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 30px;
  border: 1px solid var(--sidebar-border);
  box-sizing: border-box;
}

.flashcard-front {
  background: var(--paper-cream);
  color: var(--text-primary);
}

.flashcard-back {
  background: var(--accent-light);
  color: var(--text-primary);
  transform: rotateY(180deg);
}

.flashcard-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--btn-border);
  color: var(--text-secondary);
  position: absolute;
  top: 15px;
}

.flashcard-text {
  font-family: var(--font-canvas);
  font-size: 22px;
  line-height: 1.4;
  word-break: break-word;
  color: var(--text-primary);
}

/* ═══════════════════════════════════════════
   NOTEBOOKS & FOLDERS TREE
════════════════════════════════════════════ */
.notebook-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: var(--radius);
  margin-bottom: 4px;
  cursor: pointer;
  font-size: 13px;
  transition: var(--transition);
  color: var(--text-primary);
}

.notebook-item:hover {
  background: var(--btn-hover);
}

.notebook-item.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 500;
}

.folder-header {
  display: flex;
  align-items: center;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 12px;
  margin-bottom: 6px;
  font-size: 12px;
}

.folder-header i {
  margin-right: 6px;
  color: var(--accent);
}

.notebook-item-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.notebook-item:hover .notebook-item-actions {
  opacity: 1;
}

.notebook-item-actions button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 4px;
  font-size: 11px;
}

.notebook-item-actions button:hover {
  color: var(--accent);
}

/* ═══════════════════════════════════════════
   PRINT STYLES
════════════════════════════════════════════ */
@media print {
  #toolbar,
  #sidebar,
  #page-nav,
  #pen-cursor,
  #export-toast,
  .page-label,
  .page-editor {
    display: none !important;
  }

  #app {
    display: block;
    padding: 0;
  }

  #canvas-area {
    overflow: visible;
    padding: 0;
    background: white !important;
  }

  #canvas-area::before {
    display: none;
  }

  #page-container {
    gap: 0;
  }

  .page-wrapper {
    page-break-after: always;
    break-after: page;
  }

  .canvas-container {
    box-shadow: none;
  }

  .canvas-page {
    width: 100% !important;
    height: auto !important;
    page-break-after: always;
    break-after: page;
  }
}

/* ═══════════════════════════════════════════
   THEME PACK GRID
═══════════════════════════════════════════ */
.theme-pack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 4px;
}

.theme-pack-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 8px 4px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.18s, transform 0.15s, box-shadow 0.18s;
  font-size: 11px;
  font-family: var(--font-ui);
  color: var(--text);
}

.theme-pack-btn:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(var(--accent-rgb, 200, 98, 42), 0.18);
}

.theme-swatch {
  width: 40px;
  height: 28px;
  border-radius: 6px;
  display: block;
  border: 1px solid rgba(0,0,0,0.1);
}

/* ═══════════════════════════════════════════
   UTILITY CLASSES & UI COMPONENTS
════════════════════════════════════════════ */
.notebook-actions-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.notebook-actions-row .btn {
  flex: 1;
}

.notebook-list-scroll {
  max-height: 250px;
  overflow-y: auto;
  padding-right: 4px;
}

.flashcard-modal-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
}

.flashcard-controls-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 25px;
  width: 100%;
  gap: 15px;
}

.flashcard-controls-row .btn {
  flex: 1;
}

.flashcard-progress-label {
  font-weight: bold;
  font-family: var(--font-ui);
  min-width: 90px;
  text-align: center;
}

.template-actions-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ollama-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.ollama-hint code {
  background: var(--sb-bg, var(--input-bg));
  padding: 1px 4px;
  border-radius: 3px;
}

/* ═══════════════════════════════════════════
   NOTEBOOK EXPLORER
═══════════════════════════════════════════ */
.notebook-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.folder-header {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 4px 3px;
  margin-top: 6px;
  border-bottom: 1px solid var(--border);
}

.notebook-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 8px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-ui);
  color: var(--text);
  transition: background 0.15s, color 0.15s;
  gap: 6px;
}

.notebook-item:hover {
  background: var(--surface-hover, rgba(200, 98, 42, 0.07));
}

.notebook-item.active {
  background: rgba(var(--accent-rgb, 200, 98, 42), 0.12);
  color: var(--accent);
  font-weight: 600;
}

.notebook-item-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s;
}

.notebook-item:hover .notebook-item-actions {
  opacity: 1;
}

.notebook-item-actions button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 2px 4px;
  border-radius: 4px;
  font-size: 11px;
  transition: color 0.15s, background 0.15s;
}

.notebook-item-actions button:hover {
  color: #c00;
  background: rgba(200, 0, 0, 0.07);
}

/* ═══════════════════════════════════════════
   FLASHCARD MODAL
═══════════════════════════════════════════ */
.flashcard-modal-card {
  max-width: 480px;
}

.flashcard-modal-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
}

.flashcard-container {
  perspective: 1000px;
  width: 100%;
  height: 180px;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.42, 0, 0.58, 1);
  border-radius: 14px;
}

.flashcard-inner.flipped {
  transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.1);
}

.flashcard-front {
  background: linear-gradient(135deg, #fef9f0, #f5e8d0);
  border: 1.5px solid #e8d5b0;
}

.flashcard-back {
  background: linear-gradient(135deg, #eef4ff, #dde8ff);
  border: 1.5px solid #b0c8e8;
  transform: rotateY(180deg);
}

.flashcard-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.7;
}

.flashcard-text {
  font-size: 15px;
  font-family: var(--font-ui);
  color: var(--text);
  text-align: center;
  line-height: 1.5;
}

/* ═══════════════════════════════════════════
   STUDY MODE ACTIVE STATE
═══════════════════════════════════════════ */
body.study-mode-active #sidebar {
  display: none !important;
}

body.study-mode-active #app {
  grid-template-columns: 1fr !important;
  padding-top: 56px !important;
}

body.study-mode-active #canvas-area {
  padding-left: 16px !important;
  padding-right: 16px !important;
  width: 100% !important;
}

body.study-mode-active #canvas-area::before {
  left: 0 !important;
  right: 0 !important;
  width: 100% !important;
}

/* Floating/Dimmed Top Toolbar in Study Mode */
body.study-mode-active #toolbar {
  opacity: 0.5;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateY(0) !important;
}

body.study-mode-active #toolbar:hover,
body.study-mode-active #toolbar:focus-within {
  opacity: 1;
}

/* Hide standard page nav in study mode */
body.study-mode-active #page-nav {
  opacity: 0 !important;
  pointer-events: none !important;
  transform: translate(-50%, 40px) !important;
  transition: opacity 0.3s, transform 0.3s;
}

/* Touch devices have no hover — keep controls clearly visible */
@media (hover: none) {
  body.study-mode-active #toolbar {
    opacity: 0.85;
  }
}

/* Floating Exit Button Styling */
#btn-exit-study-mode {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 1000;
  box-shadow: 0 6px 20px rgba(192, 98, 42, 0.35), 0 2px 8px rgba(0, 0, 0, 0.12);
  font-weight: 600;
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: 40px;
  padding: 12px 24px;
  font-size: 14px;
  display: none;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), background 0.2s, box-shadow 0.2s;
}

#btn-exit-study-mode:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px rgba(192, 98, 42, 0.45), 0 4px 12px rgba(0, 0, 0, 0.15);
  background: var(--accent);
}

#btn-exit-study-mode:active {
  transform: translateY(0) scale(0.98);
}

#btn-study-mode.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 10px rgba(var(--accent-rgb, 200, 98, 42), 0.35);
}

/* ═══════════════════════════════════════════
   VOICE BUTTON ACCENT STATE
═══════════════════════════════════════════ */
#btn-voice.accent {
  background: var(--accent);
  color: white;
  animation: pulse-glow 1.2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb, 200, 98, 42), 0.4); }
  50% { box-shadow: 0 0 0 7px rgba(var(--accent-rgb, 200, 98, 42), 0); }
}