@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Merriweather:ital,wght@0,300;0,400;0,700;1,300;1,400&family=Outfit:wght@600;700;800&family=Fira+Code:wght@400;500;600&display=swap');

:root {
  /* Paper & Ink Theme Colors */
  --bg-paper: #faf9f6;          /* Soft parchment / off-white background */
  --bg-card: #ffffff;           /* Crisp white card surface */
  --bg-subtle: #f4f1ea;         /* Soft sepia accent fill */
  --bg-hover: #f1ede4;
  
  --text-ink: #2a2a2a;          /* Deep charcoal ink text */
  --text-muted: #555555;        /* Muted gray text */
  --text-dim: #777777;          /* Dim secondary text */
  
  --border-light: #e5e5e5;       /* Thin light-gray borders */
  --border-subtle: #dcd6c8;      /* Warm sepia border */

  --accent-navy: #1e3a8a;       /* Deep academic navy primary accent */
  --accent-navy-hover: #1e40af;
  --accent-sepia: #78350f;      /* Muted sepia accent */
  --accent-cyan: #0284c7;

  --success-bg: #f0fdf4;
  --success-border: #86efac;
  --success-text: #166534;

  --error-bg: #fef2f2;
  --error-border: #fca5a5;
  --error-text: #991b1b;

  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 6px;
  
  --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
  --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-modal: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.hidden {
  display: none !important;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Merriweather', Georgia, serif;
  background-color: var(--bg-paper);
  color: var(--text-ink);
  min-height: 100vh;
  padding: 0 0 3rem 0;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* GLOBAL NAVIGATION BAR */
.global-navbar {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
  font-family: 'Inter', system-ui, sans-serif;
  padding: 0.75rem 1.5rem;
  margin-bottom: 2rem;
}

.nav-container {
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text-ink);
}

.nav-brand-icon {
  font-size: 1.4rem;
}

.nav-brand-name {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 800;
  color: #111827;
  letter-spacing: -0.02em;
}

.nav-brand-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--accent-navy);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition-fast);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover {
  color: var(--accent-navy);
  background: var(--bg-subtle);
}

.nav-link.active {
  color: var(--accent-navy);
  font-weight: 700;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.primary-nav-btn {
  background: var(--accent-navy);
  border: 1px solid var(--accent-navy);
  color: #ffffff !important;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.primary-nav-btn:hover {
  background: var(--accent-navy-hover);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.2);
}

.logout-btn {
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.logout-btn:hover {
  background: var(--error-bg);
  color: var(--error-text);
  border-color: var(--error-border);
}

.user-badge {
  font-size: 0.85rem;
  color: var(--text-ink);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-weight: 500;
}

.app-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.view-container {
  animation: fadeIn 0.25s ease-out;
}

/* PUBLIC MARKETING HOME VIEW */
.hero-section {
  text-align: center;
  padding: 2.5rem 1rem 4rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.1rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-navy);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-navy);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(30, 58, 138, 0.4);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-title {
  font-family: 'Outfit', sans-serif;
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  color: #111827;
  max-width: 860px;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 720px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.hero-btn {
  text-decoration: none;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.primary-hero-btn {
  background: var(--accent-navy);
  color: #ffffff;
  border: 1px solid var(--accent-navy);
  box-shadow: 0 4px 14px rgba(30, 58, 138, 0.25);
}

.primary-hero-btn:hover {
  background: var(--accent-navy-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 58, 138, 0.35);
}

.secondary-hero-btn {
  background: var(--bg-card);
  color: var(--text-ink);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-subtle);
}

.secondary-hero-btn:hover {
  background: var(--bg-subtle);
  border-color: var(--border-subtle);
}

/* HERO PREVIEW CARD */
.hero-preview-card {
  width: 100%;
  max-width: 920px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  overflow: hidden;
  font-family: 'Inter', system-ui, sans-serif;
  text-align: left;
}

.preview-card-header {
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.preview-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.preview-dot.red { background: #ef4444; }
.preview-dot.yellow { background: #f59e0b; }
.preview-dot.green { background: #10b981; }

.preview-card-title {
  margin-left: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.preview-card-body {
  padding: 2rem;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.preview-item {
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  padding: 1.25rem;
  border-radius: var(--radius-md);
}

.preview-item-icon {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.preview-item-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 0.25rem;
}

.preview-item-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* HOW IT WORKS SECTION */
.how-it-works-section {
  padding: 4rem 1rem;
}

.section-heading-center {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title-lg {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  color: #111827;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-subtle);
  position: relative;
  transition: var(--transition-fast);
}

.step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.step-num {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-navy);
  opacity: 0.25;
  margin-bottom: 0.5rem;
}

.step-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* CTA SECTION */
.cta-section {
  padding: 2rem 1rem 4rem 1rem;
}

.cta-card {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-hover);
}

.cta-title {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.cta-desc {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 1.5rem auto;
}

/* PUBLIC ABOUT MISSION VIEW */
.about-hero-block {
  text-align: center;
  margin-bottom: 3rem;
  padding-top: 1rem;
}

.about-main-title {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: #111827;
  margin-bottom: 0.75rem;
}

.about-content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-subtle);
}

.about-icon {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.about-card h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 0.6rem;
}

.about-card p {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* AUTHENTICATION VIEW */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem 1rem;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  width: 100%;
  max-width: 440px;
  padding: 2.25rem;
  font-family: 'Inter', system-ui, sans-serif;
}

.auth-card-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.auth-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.auth-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: #111827;
  margin-bottom: 0.3rem;
}

.auth-tab-bar {
  display: flex;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.25rem;
  margin-bottom: 1.5rem;
}

.auth-tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  padding: 0.55rem;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.auth-tab-btn.active {
  background: var(--bg-card);
  color: var(--accent-navy);
  box-shadow: var(--shadow-subtle);
  font-weight: 700;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-ink);
  margin-bottom: 0.4rem;
}

.form-input {
  width: 100%;
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  padding: 0.7rem 0.95rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.92rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-input:focus {
  border-color: var(--accent-navy);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.auth-submit-btn {
  width: 100%;
  background: var(--accent-navy);
  border: 1px solid var(--accent-navy);
  color: #ffffff;
  padding: 0.8rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
  margin-top: 0.5rem;
}

.auth-submit-btn:hover {
  background: var(--accent-navy-hover);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
}

.auth-status-banner {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.auth-status-banner.error {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--error-text);
}

.auth-status-banner.success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success-text);
}

.auth-status-banner.info {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--accent-navy);
}

.auth-footer-note {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 1.5rem;
}

/* UPGRADED DASHBOARD FUNCTIONAL ZONES */
.dashboard-container {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  animation: fadeIn 0.25s ease-out;
}

/* Admin Tools Panel Styling */
.admin-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid #7c3aed;
  border-radius: var(--radius-md);
  padding: 1.25rem 1.6rem;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  animation: fadeIn 0.25s ease-out;
}

.admin-panel-header {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.admin-panel-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: #6d28d9;
}

.admin-panel-subtitle {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.dashboard-zone {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.zone-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 0.6rem;
}

.zone-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: #111827;
}

.zone-badge {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-navy);
  background: var(--bg-subtle);
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
}

.zone-subtitle {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* QUICK ACTION DROPZONE */
.quick-action-dropzone {
  background: var(--bg-card);
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.quick-action-dropzone:hover {
  border-color: var(--accent-navy);
  background: var(--bg-subtle);
  box-shadow: var(--shadow-subtle);
}

.dropzone-icon {
  font-size: 2.5rem;
}

.dropzone-text-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
  min-width: 250px;
}

.dropzone-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: #111827;
}

.dropzone-desc {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.empty-dashboard-card {
  background: var(--bg-card);
  border: 1px dashed var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text-muted);
  grid-column: 1 / -1;
}

.empty-dashboard-card h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  color: #111827;
  margin-bottom: 0.4rem;
}

.dashboard-course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.dashboard-course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  transition: var(--transition-fast);
}

.dashboard-course-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--border-subtle);
}

.card-course-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #111827;
  line-height: 1.35;
  margin-bottom: 0.4rem;
}

.card-meta-badge {
  display: inline-block;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-navy);
  background: var(--bg-subtle);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  margin-bottom: 0.75rem;
}

.card-course-desc {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.card-read-btn {
  background: var(--accent-navy);
  border: 1px solid var(--accent-navy);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  text-align: center;
  transition: var(--transition-fast);
}

.card-read-btn:hover {
  background: var(--accent-navy-hover);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
}

/* Upload Settings Modal Styling */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(17, 24, 39, 0.5);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 620px;
  overflow: hidden;
  animation: modalIn 0.25s ease-out;
  font-family: 'Inter', system-ui, sans-serif;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(-10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  padding: 1.25rem 1.6rem;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: #111827;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  padding: 0.2rem;
}

.modal-close-btn:hover {
  color: var(--text-ink);
}

.modal-body {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.file-input {
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.9rem;
  width: 100%;
}

.settings-panel {
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.panel-header {
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-navy);
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 0.5rem;
}

.toggle-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

/* Custom Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #cbd5e1;
  transition: .3s;
  border-radius: 999px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

input:checked + .toggle-slider {
  background-color: var(--accent-navy);
}

input:focus + .toggle-slider {
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.2);
}

input:checked + .toggle-slider:before {
  transform: translateX(22px);
}

.toggle-text-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.toggle-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-ink);
}

.toggle-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.upload-status-msg {
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  line-height: 1.5;
}

.upload-status-msg.success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success-text);
}

.upload-status-msg.info {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--accent-navy);
}

.modal-footer {
  padding: 1.1rem 1.6rem;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 0.8rem;
}

/* Viewer Container & Clean Workspace Grid */
.viewer-container {
  animation: fadeIn 0.25s ease-out;
}

.workspace-grid {
  display: grid;
  grid-template-columns: 290px 1fr;
  gap: 2.2rem;
}

@media (max-width: 900px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

/* Sidebar Table of Contents Navigation */
.sidebar-nav {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  height: fit-content;
  position: sticky;
  top: 5rem;
  font-family: 'Inter', system-ui, sans-serif;
}

.back-btn {
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  color: var(--accent-navy);
  padding: 0.55rem 0.95rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: var(--transition-fast);
}

.back-btn:hover {
  background: var(--bg-subtle);
  border-color: var(--accent-navy);
}

.sidebar-title {
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toc-item {
  padding: 0.7rem 0.95rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  border: 1px solid transparent;
}

.toc-item:hover {
  background: var(--bg-subtle);
  color: var(--text-ink);
}

.toc-item.active {
  background: var(--bg-subtle);
  color: var(--accent-navy);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--accent-navy);
  font-weight: 700;
}

.main-content-column {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.document-view {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Main Academic Print Section Card */
.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-subtle);
  animation: fadeIn var(--transition-smooth);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-header {
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 1.1rem;
  margin-bottom: 2rem;
}

.section-title {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-size: 1.75rem;
  font-weight: 800;
  color: #111827;
}

.block-subheading {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-navy);
  margin: 1.75rem 0 0.9rem 0;
  border-bottom: 1px dashed var(--border-light);
  padding-bottom: 0.4rem;
}

.block-paragraph {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-ink);
  margin-bottom: 1.6rem;
}

/* Pagination Footer Controls */
.pagination-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  padding: 1.1rem 1.6rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-subtle);
  margin-top: 1rem;
  font-family: 'Inter', system-ui, sans-serif;
}

.nav-controls-group {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.telemetry-controls-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav-btn {
  background: var(--accent-navy);
  border: 1px solid var(--accent-navy);
  color: #ffffff;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-btn:hover:not(:disabled) {
  background: var(--accent-navy-hover);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
  transform: translateY(-1px);
}

.nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background: #e5e7eb;
  color: #9ca3af;
  border-color: #e5e7eb;
}

.telemetry-btn {
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  color: var(--text-ink);
  padding: 0.55rem 0.95rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.telemetry-btn:hover {
  background: var(--bg-subtle);
  border-color: var(--accent-navy);
  color: var(--accent-navy);
}

.page-indicator {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent-navy);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
}

/* Objectives List Component */
.block-objectives-list {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--accent-navy);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  margin-bottom: 1.8rem;
  font-family: 'Inter', system-ui, sans-serif;
}

.list-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-navy);
  margin-bottom: 1rem;
}

.objectives-ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.objectives-ul li {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--text-ink);
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.bullet-icon {
  color: var(--success-text);
  font-weight: 800;
}

/* Flashcards Component */
.block-flashcard-deck {
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 2rem;
  font-family: 'Inter', system-ui, sans-serif;
}

.deck-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-navy);
  margin-bottom: 1.25rem;
}

.flashcard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.flashcard-wrapper {
  perspective: 1000px;
  height: 200px;
  cursor: pointer;
}

.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;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-subtle);
}

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

.flashcard-front, .flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border-subtle);
}

.flashcard-front {
  background: var(--bg-card);
  color: var(--text-ink);
}

.flashcard-back {
  background: var(--accent-navy);
  color: #ffffff;
  transform: rotateY(180deg);
}

.card-category-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.05);
}

.flashcard-back .card-category-badge {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.card-front-text, .card-back-text {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 1rem;
  line-height: 1.5;
  font-weight: 500;
}

.card-flip-prompt {
  font-size: 0.75rem;
  opacity: 0.75;
  font-weight: 600;
}

/* Quiz Component */
.block-quiz {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 2rem;
  font-family: 'Inter', system-ui, sans-serif;
}

.quiz-header-tag {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-navy);
  background: var(--bg-subtle);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 1rem;
}

.quiz-question {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 1.25rem;
  line-height: 1.4;
}

.hint-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--accent-sepia);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 1rem;
  transition: var(--transition-fast);
}

.hint-btn:hover {
  background: var(--bg-subtle);
}

.hint-box {
  display: none;
  background: var(--bg-subtle);
  border-left: 3px solid var(--accent-sepia);
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-ink);
  margin-bottom: 1.25rem;
}

.hint-box.open {
  display: block;
}

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.option-btn {
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 0.95rem;
}

.option-btn:hover:not(.disabled) {
  background: var(--bg-subtle);
  border-color: var(--accent-navy);
}

.option-key-badge {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.82rem;
  flex-shrink: 0;
}

.option-btn.correct {
  background: var(--success-bg) !important;
  border-color: var(--success-border) !important;
  color: var(--success-text) !important;
}

.option-btn.correct .option-key-badge {
  background: var(--success-text);
  color: #ffffff;
  border-color: var(--success-text);
}

.option-btn.incorrect {
  background: var(--error-bg) !important;
  border-color: var(--error-border) !important;
  color: var(--error-text) !important;
}

.option-btn.incorrect .option-key-badge {
  background: var(--error-text);
  color: #ffffff;
  border-color: var(--error-text);
}

.feedback-banner {
  display: none;
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  line-height: 1.6;
}

.feedback-banner.show {
  display: block;
}

.feedback-banner.success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success-text);
}

.feedback-banner.error {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--error-text);
}