/* ===========================
   ABOUT PAGE STYLES
   =========================== */

.about-page {
  min-height: 100vh;
  background: var(--bg-base);
  color: var(--text-primary);
  position: relative;
  overflow-x: hidden;
  font-family: 'Inter', sans-serif;
}

/* Override body overflow:hidden for the landing page (body uses it for app sidebar layout) */
body:has(.about-page) {
  height: auto;
  overflow: auto;
}

/* Animated orbs */
.about-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

.about-orb-1 {
  width: 600px;
  height: 600px;
  background: #6366f1;
  top: -200px;
  right: -100px;
  animation: aboutOrbFloat 20s ease-in-out infinite;
}

.about-orb-2 {
  width: 500px;
  height: 500px;
  background: #ec4899;
  bottom: -100px;
  left: -200px;
  animation: aboutOrbFloat 25s ease-in-out infinite reverse;
}

.about-orb-3 {
  width: 400px;
  height: 400px;
  background: #14b8a6;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: aboutOrbFloat 30s ease-in-out infinite;
}

@keyframes aboutOrbFloat {
  0%, 100% { transform: translateY(0) translateX(0); }
  33% { transform: translateY(-40px) translateX(20px); }
  66% { transform: translateY(20px) translateX(-30px); }
}

/* ===== NAVIGATION ===== */
.about-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
}

.about-nav-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.about-nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.about-nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

.about-nav-links a:hover {
  color: var(--text-primary);
}

.about-nav-cta {
  background: var(--accent) !important;
  color: white !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600 !important;
  transition: all 0.2s !important;
}

.about-nav-cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* ===== HERO SECTION ===== */
.about-hero {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: 140px 24px 80px;
  text-align: center;
}

.about-hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: #818cf8;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.about-hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.about-gradient-text {
  background: linear-gradient(135deg, #6366f1, #ec4899, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 36px;
}

.about-hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.about-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.about-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.about-btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  border-radius: 12px;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
}

.about-btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.05);
}

.about-btn-large {
  padding: 18px 36px;
  font-size: 18px;
}

/* Stats bar */
.about-stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 60px;
  padding: 20px 32px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  flex-wrap: wrap;
}

.about-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.about-stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
}

.about-stat-label {
  font-size: 12px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-subtle);
}

/* ===== SECTIONS ===== */
.about-section {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 100px 24px;
}

.about-section-header {
  text-align: center;
  margin-bottom: 60px;
}

.about-section-badge {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: #818cf8;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-section-title {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.about-section-title em {
  font-style: normal;
  background: linear-gradient(135deg, #6366f1, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== FEATURES GRID ===== */
.about-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.about-feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 28px;
  transition: all 0.3s ease;
}

.about-feature-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.about-feature-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.about-feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.about-feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.about-feature-card code {
  background: rgba(99, 102, 241, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: #818cf8;
}

/* ===== ALGORITHM SECTION ===== */
.about-algo-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 60px;
}

.about-algo-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 32px;
}

.about-algo-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.about-algo-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.about-algo-solution {
  border-color: rgba(99, 102, 241, 0.3);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(236, 72, 153, 0.03));
}

/* Forgetting curve bars */
.about-forget-bars {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about-forget-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.about-forget-label {
  font-size: 12px;
  color: var(--text-tertiary);
  white-space: nowrap;
  min-width: 120px;
  text-align: right;
}

.about-forget-bar {
  flex: 1;
  height: 32px;
  background: var(--bg-elevated);
  border-radius: 8px;
  overflow: hidden;
}

.about-forget-fill {
  height: 100%;
  background: linear-gradient(90deg, #f59e0b, #ef4444);
  border-radius: 8px;
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-size: 11px;
  font-weight: 600;
  color: white;
  white-space: nowrap;
}

.about-forget-warn {
  background: linear-gradient(90deg, #ef4444, #dc2626);
}

.about-forget-danger {
  background: linear-gradient(90deg, #dc2626, #991b1b);
}

/* Review steps */
.about-review-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about-step {
  display: flex;
  align-items: center;
  gap: 14px;
}

.about-step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.about-step-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.about-step-text strong {
  font-size: 14px;
  font-weight: 600;
}

.about-step-text span {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Rating buttons explanation */
.about-ratings-explain {
  text-align: center;
}

.about-ratings-explain h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 28px;
}

.about-ratings-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.about-rating-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 24px 16px;
  text-align: center;
  transition: transform 0.2s;
}

.about-rating-card:hover {
  transform: translateY(-3px);
}

.about-rating-btn-label {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.about-rating-card p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.about-rating-effect {
  font-size: 11px;
  color: var(--text-tertiary);
  line-height: 1.6;
}

.about-rating-again { border-top: 3px solid #ef4444; }
.about-rating-again .about-rating-btn-label { color: #ef4444; }

.about-rating-hard { border-top: 3px solid #f59e0b; }
.about-rating-hard .about-rating-btn-label { color: #f59e0b; }

.about-rating-good { border-top: 3px solid #22c55e; }
.about-rating-good .about-rating-btn-label { color: #22c55e; }

.about-rating-easy { border-top: 3px solid #3b82f6; }
.about-rating-easy .about-rating-btn-label { color: #3b82f6; }

/* ===== BENEFITS ===== */
.about-benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.about-benefit {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
}

.about-benefit:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.about-benefit-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.about-benefit h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.about-benefit p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== ROADMAP TIMELINE ===== */
.about-roadmap-timeline {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.about-roadmap-timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-subtle);
}

.about-roadmap-item {
  position: relative;
  padding-bottom: 32px;
}

.about-roadmap-dot {
  position: absolute;
  left: -34px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 2px solid var(--border-default);
  z-index: 1;
}

.about-roadmap-done .about-roadmap-dot {
  background: #22c55e;
  border-color: #22c55e;
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.4);
}

.about-roadmap-progress .about-roadmap-dot {
  background: #f59e0b;
  border-color: #f59e0b;
  box-shadow: 0 0 8px rgba(245, 158, 11, 0.4);
  animation: roadmapPulse 2s ease-in-out infinite;
}

@keyframes roadmapPulse {
  0%, 100% { box-shadow: 0 0 8px rgba(245, 158, 11, 0.4); }
  50% { box-shadow: 0 0 16px rgba(245, 158, 11, 0.7); }
}

.about-roadmap-content {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 20px 24px;
}

.about-roadmap-status {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
}

.about-roadmap-content h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 6px 0 4px;
}

.about-roadmap-content p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== CTA SECTION ===== */
.about-cta-section {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 80px 24px 100px;
  background: linear-gradient(180deg, transparent, rgba(99, 102, 241, 0.05));
}

.about-cta-section h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 16px;
}

.about-cta-section p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ===== FOOTER ===== */
.about-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-subtle);
  padding: 24px;
}

.about-footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ===== LIGHT THEME OVERRIDES ===== */
[data-theme="light"] .about-page {
  background: #ffffff;
}

[data-theme="light"] .about-nav {
  background: rgba(255, 255, 255, 0.85);
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .about-orb {
  opacity: 0.08;
}

[data-theme="light"] .about-hero-badge {
  background: rgba(99, 102, 241, 0.08);
  border-color: rgba(99, 102, 241, 0.2);
  color: #6366f1;
}

[data-theme="light"] .about-section-badge {
  background: rgba(99, 102, 241, 0.06);
  border-color: rgba(99, 102, 241, 0.15);
  color: #6366f1;
}

[data-theme="light"] .about-feature-card code {
  color: #6366f1;
}

[data-theme="light"] .about-algo-solution {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.04), rgba(236, 72, 153, 0.02));
}

/* ===== NAV PROFILE DROPDOWN ===== */
.about-nav-profile {
  position: relative;
  cursor: pointer;
}

.about-nav-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 2px solid var(--border-default);
  object-fit: cover;
  transition: border-color 0.2s;
}

.about-nav-avatar-placeholder {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  border: 2px solid var(--border-default);
}

.about-nav-profile:hover .about-nav-avatar,
.about-nav-profile:hover .about-nav-avatar-placeholder {
  border-color: var(--accent);
}

.about-nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 220px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all 0.2s ease;
  z-index: 200;
}

.about-nav-profile:hover .about-nav-dropdown,
.about-nav-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.about-nav-dropdown-header {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 4px;
}

.about-nav-dropdown-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.about-nav-dropdown-email {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.about-nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  background: none;
  border: none;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}

.about-nav-dropdown-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.about-nav-dropdown-item.danger {
  color: var(--danger);
}

.about-nav-dropdown-item.danger:hover {
  background: rgba(239, 68, 68, 0.08);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .about-features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-algo-visual {
    grid-template-columns: 1fr;
  }
  
  .about-ratings-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-benefits-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .about-nav {
    padding: 12px 16px;
  }
  
  .about-nav-links a:not(.about-nav-cta) {
    display: none;
  }
  
  .about-hero {
    padding: 100px 16px 50px;
  }
  
  .about-hero-title {
    font-size: 28px;
    letter-spacing: -1px;
  }
  
  .about-hero-subtitle {
    font-size: 15px;
    margin-bottom: 28px;
  }
  
  /* Stack hero buttons vertically on mobile */
  .about-hero-actions {
    flex-direction: column;
    gap: 12px;
  }
  
  .about-btn-primary,
  .about-btn-secondary {
    width: 100%;
    justify-content: center;
    padding: 14px 24px;
  }
  
  .about-btn-large {
    padding: 16px 24px;
    font-size: 16px;
  }
  
  .about-features-grid {
    grid-template-columns: 1fr;
  }
  
  /* Ratings: single column on small screens */
  .about-ratings-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  /* Stats bar: wrap and reduce size */
  .about-stats-bar {
    gap: 12px;
    padding: 16px 20px;
    flex-wrap: wrap;
    justify-content: space-around;
  }
  
  .about-stat-divider {
    display: none;
  }
  
  .about-stat {
    min-width: 70px;
  }
  
  .about-stat-value {
    font-size: 20px;
  }
  
  .about-stat-label {
    font-size: 10px;
    letter-spacing: 0.5px;
  }
  
  .about-section {
    padding: 60px 16px;
  }
  
  .about-section-title {
    font-size: 24px;
  }
  
  /* Algo cards */
  .about-algo-card {
    padding: 20px;
  }
  
  .about-forget-label {
    min-width: 90px;
    font-size: 11px;
  }
  
  .about-forget-fill {
    font-size: 10px;
  }
  
  /* Rating cards */
  .about-rating-card {
    padding: 18px 14px;
  }
  
  .about-rating-btn-label {
    font-size: 16px;
  }
  
  .about-rating-card p {
    font-size: 12px;
  }
  
  .about-rating-effect {
    font-size: 10px;
  }
  
  /* CTA section */
  .about-cta-section {
    padding: 60px 16px 80px;
  }
  
  .about-cta-section h2 {
    font-size: 24px;
  }
  
  /* Footer */
  .about-footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* Ultra-small screens */
@media (max-width: 380px) {
  .about-nav {
    padding: 10px 12px;
  }
  
  .about-nav-brand {
    font-size: 17px;
  }
  
  .about-nav-cta {
    padding: 6px 14px !important;
    font-size: 13px !important;
  }
  
  .about-hero {
    padding: 90px 12px 40px;
  }
  
  .about-hero-title {
    font-size: 24px;
  }
  
  .about-stats-bar {
    gap: 8px;
    padding: 14px 12px;
  }
  
  .about-stat-value {
    font-size: 18px;
  }
}