/* assets/css/about.css - Giao diện Trang Giới Thiệu Web (About Us) */

.about-page-content {
  padding: 24px 0 60px 0;
  flex: 1;
}

/* Breadcrumb điều hướng */
.about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.about-breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.about-breadcrumb a:hover {
  color: var(--primary);
}

.about-breadcrumb span {
  color: var(--text-dim);
}

.about-breadcrumb .current {
  color: var(--primary);
  font-weight: 600;
}

/* 1. HERO SHOWCASE CỦA TRANG GIỚI THIỆU */
.about-hero-section {
  position: relative;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.16) 0%, rgba(6, 182, 212, 0.12) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  margin-bottom: 40px;
  overflow: hidden;
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  text-align: center;
}

.about-hero-section::before {
  content: '';
  position: absolute;
  top: -60%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  pointer-events: none;
}

.about-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.4);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.25);
}

.about-hero-title {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.3;
  max-width: 860px;
  margin: 0 auto 16px auto;
  letter-spacing: -0.5px;
}

.about-hero-title span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 36px auto;
  line-height: 1.7;
}

/* 4 Khối thống kê ấn tượng (Live Stats Grid) */
.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 2;
}

.about-stat-card {
  background: rgba(18, 22, 34, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: all var(--transition-smooth);
}

.about-stat-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 16px var(--primary-glow);
}

.about-stat-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.2));
  border: 1px solid rgba(139, 92, 246, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--secondary);
  margin-bottom: 12px;
}

.about-stat-number {
  font-size: 1.85rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 4px;
}

.about-stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 500;
}

/* 2. CÂU CHUYỆN THƯƠNG HIỆU & SỨ MỆNH (BRAND STORY) */
.about-story-section {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: center;
  margin-bottom: 50px;
}

.about-story-text {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.about-section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-section-heading {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.35;
  letter-spacing: -0.4px;
}

.about-paragraph {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* 4 Giá trị cốt lõi nhỏ */
.about-values-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 8px;
}

.about-value-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.about-value-item:hover {
  border-color: var(--secondary);
  transform: translateX(3px);
}

.about-value-item i {
  color: var(--secondary);
  font-size: 1.1rem;
  margin-top: 3px;
}

.about-value-item strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 2px;
}

.about-value-item span {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* Khối Illustration / Visual Card bên phải */
.about-story-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.about-visual-card {
  width: 100%;
  max-width: 380px;
  background: linear-gradient(145deg, rgba(26, 32, 53, 0.85), rgba(15, 18, 30, 0.9));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(139, 92, 246, 0.2);
  position: relative;
  overflow: hidden;
}

.about-visual-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.visual-badge-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.visual-brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Outfit', sans-serif;
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--text-main);
}

.visual-brand-logo span {
  color: var(--secondary);
}

.visual-status-pill {
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.visual-status-pill::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 6px #10b981;
}

.visual-preview-box {
  background: rgba(0, 0, 0, 0.4);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
}

.visual-big-icon {
  font-size: 3.5rem;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
  display: inline-block;
  animation: visualIconPulse 3s ease-in-out infinite;
}

@keyframes visualIconPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

.visual-preview-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.visual-preview-sub {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.visual-meta-rows {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.visual-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.visual-meta-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.visual-meta-row strong {
  color: var(--secondary);
  font-weight: 600;
}

/* 3. HỆ THỐNG TÍNH NĂNG VƯỢT TRỘI (FEATURES GRID) */
.about-features-section {
  margin-bottom: 50px;
}

.about-features-header {
  text-align: center;
  margin-bottom: 36px;
}

.about-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.about-feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.about-feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--secondary);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5), 0 0 16px var(--secondary-glow);
}

.about-feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: linear-gradient(180deg, var(--secondary), var(--primary));
  transition: height 0.3s ease;
}

.about-feature-card:hover::before {
  height: 100%;
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(139, 92, 246, 0.15));
  border: 1px solid rgba(6, 182, 212, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--secondary);
  margin-bottom: 18px;
  transition: all var(--transition-fast);
}

.about-feature-card:hover .feature-icon-wrapper {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  color: #fff;
  box-shadow: 0 0 16px var(--secondary-glow);
}

.feature-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

/* 4. CỘT MỐC PHÁT TRIỂN & LỘ TRÌNH (ROADMAP TIMELINE) */
.about-roadmap-section {
  margin-bottom: 50px;
}

.about-timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding: 20px 0;
}

.about-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--secondary), transparent);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 30px 36px 30px;
  box-sizing: border-box;
}

.timeline-item.left {
  left: 0;
  text-align: right;
}

.timeline-item.right {
  left: 50%;
  text-align: left;
}

.timeline-dot {
  position: absolute;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-main);
  border: 3px solid var(--secondary);
  box-shadow: 0 0 10px var(--secondary-glow);
  z-index: 2;
}

.timeline-item.left .timeline-dot {
  right: -8px;
}

.timeline-item.right .timeline-dot {
  left: -8px;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  transition: all var(--transition-smooth);
}

.timeline-card:hover {
  border-color: var(--secondary);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 0 12px var(--secondary-glow);
}

.timeline-phase {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 5. KHỐI CAM KẾT & TUYÊN BỐ MIỄN TRỪ (DISCLAIMER) */
.about-disclaimer-box {
  background: rgba(239, 68, 68, 0.06);
  border: 1px dashed rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.disclaimer-icon {
  font-size: 1.75rem;
  color: #ef4444;
  margin-top: 2px;
  flex-shrink: 0;
}

.disclaimer-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.disclaimer-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 6. BANNER KÊU GỌI HÀNH ĐỘNG (CTA BANNER) */
.about-cta-banner {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.4);
}

.about-cta-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.about-cta-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 28px auto;
  line-height: 1.6;
}

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

.btn-cta-explore {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 6px 20px var(--secondary-glow);
  transition: all var(--transition-fast);
}

.btn-cta-explore:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.5);
}

.btn-cta-community {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.btn-cta-community:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--secondary);
  color: var(--secondary);
  transform: translateY(-2px);
}

/* =========================================================
   ĐỒNG BỘ CHẾ ĐỘ BAN NGÀY (LIGHT MODE) CHO TRANG ABOUT
   ========================================================= */
body.theme-light .about-hero-section {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

body.theme-light .about-hero-badge {
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.25);
}

body.theme-light .about-stat-card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

body.theme-light .about-value-item,
body.theme-light .about-feature-card,
body.theme-light .timeline-card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

body.theme-light .about-visual-card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
}

body.theme-light .visual-brand-logo {
  color: #0f172a;
}

body.theme-light .visual-preview-box {
  background: #f8fafc;
  border-color: rgba(0, 0, 0, 0.1);
}

body.theme-light .visual-meta-row {
  border-bottom-color: rgba(0, 0, 0, 0.06);
  color: #475569;
}

body.theme-light .about-disclaimer-box {
  background: rgba(239, 68, 68, 0.05);
  border-color: rgba(239, 68, 68, 0.25);
}

body.theme-light .about-cta-banner {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

body.theme-light .btn-cta-community {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.12);
  color: #334155;
}

body.theme-light .btn-cta-community:hover {
  background: #f1f5f9;
  color: var(--secondary);
}

/* =========================================================
   RESPONSIVE CHO MOBILE VÀ TABLET
   ========================================================= */
@media (max-width: 992px) {
  .about-story-section {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .about-story-visual {
    order: -1;
  }

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

  .about-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
}

@media (max-width: 768px) {
  .about-hero-section {
    padding: 30px 18px;
    margin-bottom: 30px;
  }

  .about-hero-title {
    font-size: 1.55rem;
  }

  .about-hero-desc {
    font-size: 0.9rem;
    margin-bottom: 24px;
  }

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

  .about-stat-number {
    font-size: 1.45rem;
  }

  .about-stat-label {
    font-size: 0.78rem;
  }

  .about-section-heading {
    font-size: 1.4rem;
  }

  .about-values-list {
    grid-template-columns: 1fr;
  }

  .about-features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Timeline trên Mobile chuyển thành dọc 1 bên */
  .about-timeline::before {
    left: 18px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 45px;
    padding-right: 0;
    margin-bottom: 20px;
    text-align: left !important;
  }

  .timeline-item.left,
  .timeline-item.right {
    left: 0;
  }

  .timeline-item.left .timeline-dot,
  .timeline-item.right .timeline-dot {
    left: 10px;
    right: auto;
  }

  .about-disclaimer-box {
    flex-direction: column;
    padding: 18px;
    gap: 10px;
  }

  .about-cta-banner {
    padding: 30px 18px;
  }

  .about-cta-title {
    font-size: 1.4rem;
  }

  .about-cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn-cta-explore,
  .btn-cta-community {
    width: 100%;
    justify-content: center;
  }
}