/* ===== About Page Styles ===== */

/* --- Nav link active state --- */
.nav-link.active {
  color: #3b82f6;
  font-weight: 600;
}

/* --- About Hero --- */
.about-hero {
  position: relative;
  overflow: hidden;
  padding: 64px 0 48px;
  background: #fafafa;
}

.about-hero-bg {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, rgba(99, 102, 241, 0.05) 40%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.about-hero::before {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
}

.about-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  text-align: center;
}

.about-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: #3b82f6;
  background: rgba(59, 130, 246, 0.08);
  padding: 6px 20px;
  border-radius: 20px;
  margin-bottom: 24px;
  border: 1px solid rgba(59, 130, 246, 0.12);
}

.about-hero-title {
  font-size: 44px;
  font-weight: 900;
  color: #0f172a;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.about-hero-desc {
  font-size: 16px;
  color: #64748b;
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto 32px;
}

/* --- Main Content --- */
.about-main {
  padding: 40px 0 80px;
  background: #fff;
}

.about-main-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

/* --- Sidebar Navigation --- */
.about-sidebar {
  position: sticky;
  top: 80px;
  width: 200px;
  min-width: 200px;
  flex-shrink: 0;
  background: #fafbfc;
  border-radius: 12px;
  border: 1px solid #e8ecf1;
  padding: 16px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.sidebar-title {
  font-size: 13px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid #e8ecf1;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 500;
  color: #64748b;
  transition: all 0.2s;
  cursor: pointer;
}

.sidebar-link:hover {
  background: #f1f5f9;
  color: #1e293b;
}

.sidebar-link.active {
  background: #eff6ff;
  color: #3b82f6;
  font-weight: 600;
}

.sidebar-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* --- About Content Area --- */
.about-content {
  flex: 1;
  min-width: 0;
}

/* --- About Section --- */
.about-section {
  margin-bottom: 64px;
  scroll-margin-top: 80px;
}

.about-section:last-child {
  margin-bottom: 0;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 2px solid #f1f5f9;
}

.section-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.section-title {
  font-size: 26px;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 2px;
}

.section-subtitle {
  font-size: 14px;
  color: #94a3b8;
  font-weight: 400;
}

/* ===== 1. Author Card ===== */
.author-card {
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 32px;
}

.author-avatar-section {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.author-avatar {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 900;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.author-name {
  font-size: 24px;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 4px;
}

.author-role {
  font-size: 14px;
  color: #64748b;
  font-weight: 500;
}

.author-bio {
  margin-bottom: 24px;
}

.author-bio p {
  font-size: 15px;
  color: #475569;
  line-height: 1.9;
  margin-bottom: 12px;
}

.author-bio p:last-child {
  margin-bottom: 0;
}

.author-bio strong {
  color: #1e293b;
  font-weight: 600;
}

.author-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.author-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--tag-color, #3b82f6);
  background: color-mix(in srgb, var(--tag-color, #3b82f6) 8%, #fff);
  border: 1px solid color-mix(in srgb, var(--tag-color, #3b82f6) 15%, transparent);
  padding: 6px 14px;
  border-radius: 20px;
  white-space: nowrap;
}

/* ===== 2. Site Info ===== */
.site-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.site-info-card {
  background: #fff;
  border: 1px solid #e8ecf1;
  border-radius: 12px;
  padding: 24px;
  transition: all 0.25s;
}

.site-info-card:hover {
  border-color: #cbd5e1;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

.site-info-icon {
  font-size: 28px;
  margin-bottom: 14px;
}

.site-info-title {
  font-size: 16px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

.site-info-desc {
  font-size: 13.5px;
  color: #64748b;
  line-height: 1.8;
}

.site-info-desc strong {
  color: #1e293b;
  font-weight: 600;
}

/* --- Site Stats --- */
.site-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.site-stat-item {
  text-align: center;
  padding: 24px 16px;
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border-radius: 12px;
  border: 1px solid #e8ecf1;
}

.site-stat-number {
  display: block;
  font-size: 36px;
  font-weight: 900;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.site-stat-label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 4px;
}

.site-stat-detail {
  display: block;
  font-size: 12px;
  color: #94a3b8;
}

/* ===== 3. Timeline / Changelog ===== */
.timeline {
  position: relative;
  padding-left: 36px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, #3b82f6 0%, #e2e8f0 30%, #e2e8f0 100%);
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -36px;
  top: 4px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  z-index: 1;
}

.future-marker {
  background: #fff;
  border: 2px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.done-marker {
  background: #ecfdf5;
  border: 2px solid #a7f3d0;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.1);
}

.timeline-content {
  background: #fff;
  border: 1px solid #e8ecf1;
  border-radius: 12px;
  padding: 20px;
  transition: all 0.2s;
}

.timeline-content:hover {
  border-color: #cbd5e1;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.timeline-date {
  font-size: 12px;
  font-weight: 600;
  color: #94a3b8;
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 15px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 13px;
  color: #64748b;
  line-height: 1.7;
  margin-bottom: 12px;
}

.timeline-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.timeline-badge.upcoming {
  color: #f97316;
  background: #fff7ed;
  border: 1px solid #fed7aa;
}

.timeline-badge.done-badge {
  color: #059669;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
}

.future .timeline-content {
  border-style: dashed;
  border-color: #e2e8f0;
}

/* ===== 4. Contribute ===== */
.contribute-intro {
  margin-bottom: 24px;
}

.contribute-intro p {
  font-size: 15px;
  color: #475569;
  line-height: 1.8;
}

.contribute-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.contribute-card {
  background: #fff;
  border: 1px solid #e8ecf1;
  border-radius: 12px;
  padding: 24px;
  transition: all 0.25s;
  text-align: center;
}

.contribute-card:hover {
  border-color: #cbd5e1;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.contribute-icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.contribute-title {
  font-size: 16px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

.contribute-desc {
  font-size: 13px;
  color: #64748b;
  line-height: 1.7;
  margin-bottom: 16px;
}

.contribute-action {
  padding-top: 14px;
  border-top: 1px solid #f1f5f9;
}

.contribute-link {
  font-size: 13px;
  font-weight: 600;
  color: #3b82f6;
  word-break: break-all;
}

/* --- Contribute Guidelines --- */
.contribute-guidelines {
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 28px;
}

.guidelines-title {
  font-size: 18px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 20px;
}

.guidelines-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.guideline-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.guideline-number {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.guideline-item strong {
  font-size: 14px;
  color: #0f172a;
  font-weight: 700;
  display: block;
  margin-bottom: 4px;
}

.guideline-item p {
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .about-sidebar {
    display: none;
  }

  .about-main-inner {
    max-width: 1200px;
  }
}

@media (max-width: 900px) {
  .about-hero-title {
    font-size: 32px;
  }

  .section-title {
    font-size: 22px;
  }

  .site-info-grid {
    grid-template-columns: 1fr;
  }

  .site-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .contribute-grid {
    grid-template-columns: 1fr;
  }

  .author-avatar-section {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
}

@media (max-width: 600px) {
  .about-hero {
    padding: 40px 0 32px;
  }

  .about-hero-inner {
    padding: 0 16px;
  }

  .about-hero-title {
    font-size: 26px;
  }

  .about-main-inner {
    padding: 0 16px;
  }

  .author-card {
    padding: 20px;
  }

  .author-avatar {
    width: 56px;
    height: 56px;
    font-size: 24px;
    border-radius: 16px;
  }

  .author-name {
    font-size: 20px;
  }

  .site-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .site-stat-number {
    font-size: 28px;
  }

  .section-header {
    gap: 12px;
  }

  .section-icon {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline::before {
    left: 10px;
  }

  .timeline-marker {
    left: -30px;
    width: 24px;
    height: 24px;
    font-size: 12px;
  }

  .contribute-guidelines {
    padding: 20px;
  }
}