/* 
  Landing Page: Chuỗi Hội thảo Sức khỏe Tinh thần Trẻ em (IMHC Vinmec × Vin Nexus)
  Style Guideline: Premium, Apple-inspired, Healthcare-Trustworthy, Highly Responsive
*/

/* --- Reset & Core CSS --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  scroll-behavior: smooth;
}

:root {
  /* Brand Color Palette */
  --vinmec-teal: #008fa1;
  --vinmec-teal-hover: #007786;
  --vinmec-blue: #0067ab;
  --vinmec-blue-light: #e6f0f7;
  --vin-nexus-violet: #6b21a8;
  --vin-nexus-violet-light: #f3e8ff;
  --vinmec-accent: #df3838;
  
  /* Neutral Palette */
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-dark: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --border-color: rgba(148, 163, 184, 0.15);
  --border-focus: rgba(0, 143, 161, 0.4);
  
  /* Shadows & Radius */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.05), 0 0 1px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.08), 0 0 2px rgba(15, 23, 42, 0.1);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.7;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.3;
}

span.highlight-teal {
  color: var(--vinmec-teal);
}

span.highlight-violet {
  color: var(--vin-nexus-violet);
}

/* --- Floating Sticky CTA --- */
.floating-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-color);
  z-index: 999;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.05);
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.floating-cta.show {
  transform: translateY(0);
}

.btn-floating {
  width: 100%;
  max-width: 500px;
}

/* --- Header & Navbar --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 990;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast);
}

.navbar {
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--vinmec-teal), var(--vinmec-blue));
  color: white;
  box-shadow: 0 4px 10px rgba(0, 143, 161, 0.2);
}

.logo-icon i {
  width: 20px;
  height: 20px;
}

.logo-meta {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.5px;
}

.logo-text span {
  color: var(--vinmec-teal);
}

.logo-sub {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

nav a {
  text-decoration: none;
  color: var(--text-body);
  font-weight: 500;
  font-size: 14.5px;
  transition: color var(--transition-fast);
}

nav a:hover {
  color: var(--vinmec-teal);
}

.btn-nav {
  padding: 8px 18px;
  border-radius: 20px;
  background: var(--vinmec-blue-light);
  color: var(--vinmec-blue);
  font-weight: 600;
  font-size: 14px;
  transition: all var(--transition-fast);
  border: 1px solid rgba(0, 103, 171, 0.1);
}

.btn-nav:hover {
  background: var(--vinmec-blue);
  color: white;
  transform: translateY(-1px);
}

/* --- Common UI Components --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--vinmec-teal), var(--vinmec-blue));
  color: white;
  box-shadow: 0 4px 15px rgba(0, 143, 161, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 143, 161, 0.3);
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid rgba(0, 143, 161, 0.2);
  color: var(--vinmec-teal);
}

.btn-secondary:hover {
  background: var(--vinmec-blue-light);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 143, 161, 0.2);
  box-shadow: var(--shadow-lg);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 6px 14px;
  border-radius: 20px;
  background: rgba(0, 143, 161, 0.08);
  border: 1px solid rgba(0, 143, 161, 0.15);
  color: var(--vinmec-teal);
  font-size: 12.5px;
  font-weight: 600;
}

.section-title {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.section-title h2 {
  font-size: 34px;
  letter-spacing: -0.5px;
}

.section-title p {
  color: var(--text-muted);
  font-size: 16px;
}

/* --- Section 1: Hero --- */
.hero {
  padding: 160px 0 80px 0;
  background: radial-gradient(circle at 80% 20%, rgba(230, 240, 247, 0.5) 0%, rgba(255, 255, 255, 0) 60%),
              radial-gradient(circle at 10% 80%, rgba(243, 232, 255, 0.4) 0%, rgba(255, 255, 255, 0) 50%),
              var(--bg-main);
  border-bottom: 1px solid var(--border-color);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-content h1 {
  font-size: 44px;
  line-height: 1.15;
  letter-spacing: -1.5px;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-body);
  max-width: 580px;
}

.hero-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 10px;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: white;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.hero-meta-item i {
  color: var(--vinmec-teal);
  flex-shrink: 0;
}

.hero-meta-text h5 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dark);
}

.hero-meta-text p {
  font-size: 12px;
  color: var(--text-muted);
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  margin-top: 10px;
  align-items: center;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-visual-wrapper {
  position: relative;
  width: 100%;
  max-width: 420px;
}

.hero-visual-wrapper::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100%;
  height: 100%;
  border: 2px dashed rgba(0, 143, 161, 0.3);
  border-radius: var(--radius-lg);
  z-index: 0;
}

.hero-img-box {
  position: relative;
  z-index: 2;
  background: white;
  padding: 6px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.hero-img {
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius-lg) - 4px);
  display: block;
}

/* --- Section 2: Vì sao quan trọng --- */
.storytelling {
  padding: 80px 0;
  background: white;
}

.story-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.story-quote {
  font-size: 20px;
  font-style: italic;
  font-weight: 500;
  color: var(--vinmec-blue);
  border-left: 4px solid var(--vinmec-teal);
  padding-left: 20px;
  margin: 10px 0;
  line-height: 1.6;
}

.story-text {
  font-size: 16px;
  color: var(--text-body);
}

.story-highlight-box {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 15px;
  text-align: center;
}

.story-highlight-box h4 {
  font-size: 18px;
  margin-bottom: 8px;
}

/* --- Section 3: Khó khăn cha mẹ thường gặp --- */
.pain-points {
  padding: 80px 0;
  background: var(--bg-main);
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.pain-card {
  padding: 24px;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  gap: 16px;
  transition: all var(--transition-fast);
}

.pain-card:hover {
  transform: translateY(-2px);
  border-color: rgba(223, 56, 56, 0.2);
  box-shadow: var(--shadow-sm);
}

.pain-icon {
  color: var(--vinmec-accent);
  background: rgba(223, 56, 56, 0.08);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pain-content h4 {
  font-size: 15.5px;
  margin-bottom: 6px;
}

.pain-content p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- Section 4: Góc nhìn khoa học --- */
.science {
  padding: 80px 0;
  background: white;
}

.science-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.science-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.science-content p {
  font-size: 15.5px;
}

.science-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 10px;
}

.science-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.science-badge {
  background: var(--vinmec-blue-light);
  color: var(--vinmec-blue);
  padding: 6px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.science-item h4 {
  font-size: 15.5px;
  margin-bottom: 4px;
}

.science-item p {
  font-size: 13.5px;
  color: var(--text-muted);
}

.science-visual {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.brain-model {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.brain-part {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  gap: 16px;
  align-items: center;
}

.brain-part.reptilian { border-left: 5px solid var(--vinmec-accent); }
.brain-part.mammalian { border-left: 5px solid var(--vin-nexus-violet); }
.brain-part.neocortex { border-left: 5px solid var(--vinmec-teal); }

.brain-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brain-part.reptilian .brain-icon-box { background: rgba(223, 56, 56, 0.08); color: var(--vinmec-accent); }
.brain-part.mammalian .brain-icon-box { background: var(--vin-nexus-violet-light); color: var(--vin-nexus-violet); }
.brain-part.neocortex .brain-icon-box { background: rgba(0, 143, 161, 0.08); color: var(--vinmec-teal); }

.brain-part-info h4 {
  font-size: 15px;
  margin-bottom: 2px;
}

.brain-part-info p {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* --- Section 5: Workshop sẽ giúp gì? --- */
.benefits {
  padding: 80px 0;
  background: var(--bg-main);
}

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

.benefit-card {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.benefit-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.benefit-icon.teal { background: linear-gradient(135deg, var(--vinmec-teal), #00d2c4); }
.benefit-icon.blue { background: linear-gradient(135deg, var(--vinmec-blue), #3b82f6); }
.benefit-icon.violet { background: linear-gradient(135deg, var(--vin-nexus-violet), #a855f7); }

.benefit-card h3 {
  font-size: 18px;
}

.benefit-card p {
  font-size: 14px;
  color: var(--text-body);
}

.benefit-outcome {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: 8px;
}

.benefit-outcome h5 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.benefit-outcome p {
  font-size: 13px;
  color: var(--vinmec-teal);
  font-weight: 600;
}

/* --- Section 6: Nội dung chương trình (Tabs) --- */
.curriculum-tabs {
  padding: 80px 0;
  background: white;
}

.tabs-header {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.tab-btn {
  padding: 16px 28px;
  border-radius: 30px;
  font-size: 15.5px;
  font-weight: 700;
  border: 1px solid var(--border-color);
  background: var(--bg-main);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.3;
}

.tab-btn span.tab-sub {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

.tab-btn.active {
  background: white;
  border-color: var(--vinmec-teal);
  color: var(--vinmec-teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.tab-btn.tab-ws3.active {
  border-color: var(--vin-nexus-violet);
  color: var(--vin-nexus-violet);
}

.tab-pane {
  display: none;
  max-width: 900px;
  margin: 0 auto;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

.workshop-summary {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 40px;
}

.summary-card {
  padding: 20px;
  background: var(--bg-main);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 14px;
}

.summary-card i {
  color: var(--vinmec-teal);
  flex-shrink: 0;
}

.summary-ws3 i {
  color: var(--vin-nexus-violet);
}

.summary-info h5 {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}

.summary-info p {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
}

.curriculum-timeline {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
}

.curriculum-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 150px;
  width: 2px;
  height: 100%;
  background: var(--border-color);
  z-index: 1;
}

.timeline-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  position: relative;
  z-index: 2;
  align-items: flex-start;
}

.time-tag {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--vinmec-teal);
  text-align: right;
  padding-right: 32px;
  margin-top: 24px;
}

.timeline-row-ws3 .time-tag {
  color: var(--vin-nexus-violet);
}

.timeline-card {
  padding: 24px 32px;
}

.timeline-card h4 {
  font-size: 17px;
  margin-bottom: 8px;
}

.timeline-card p {
  font-size: 14px;
  color: var(--text-body);
}

/* --- Section 7: Sự khác biệt --- */
.differentiation {
  padding: 80px 0;
  background: var(--bg-main);
}

.diff-table-wrapper {
  max-width: 900px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  background: white;
}

.diff-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.diff-table th, .diff-table td {
  padding: 24px 30px;
  border-bottom: 1px solid var(--border-color);
}

.diff-table th {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-dark);
  text-transform: uppercase;
}

.diff-table th.col-feature { width: 30%; background: var(--bg-main); }
.diff-table th.col-vinmec { width: 38%; background: var(--vinmec-blue-light); color: var(--vinmec-blue); text-align: center; }
.diff-table th.col-normal { width: 32%; background: var(--bg-main); color: var(--text-muted); }

.diff-table td.cell-feature {
  font-weight: 700;
  color: var(--text-dark);
  font-size: 14.5px;
  background: var(--bg-main);
}

.diff-table td.cell-vinmec {
  background: rgba(230, 240, 247, 0.25);
  font-weight: 500;
  font-size: 14px;
}

.diff-table td.cell-vinmec i {
  color: #00875a;
  margin-right: 6px;
}

.diff-table td.cell-normal {
  color: var(--text-muted);
  font-size: 13.5px;
}

.diff-table tr:last-child td {
  border-bottom: none;
}

/* --- Section 8: Diễn giả --- */
.speakers {
  padding: 80px 0;
  background: white;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.inclusions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  text-align: left;
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.speaker-card {
  padding: 40px;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 24px;
}

.speaker-avatar-box {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.speaker-img-placeholder {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 28px;
  color: white;
  margin-bottom: 12px;
}

.avatar-ws2-1 { background: linear-gradient(135deg, var(--vinmec-teal), var(--vinmec-blue)); }
.avatar-ws2-2 { background: linear-gradient(135deg, var(--vinmec-blue), var(--vin-nexus-violet)); }
.avatar-ws3-1 { background: linear-gradient(135deg, var(--vinmec-accent), var(--vin-nexus-violet)); }
.avatar-ws3-2 { background: linear-gradient(135deg, var(--vinmec-teal), #00d2c4); }

.speaker-details h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.speaker-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--vinmec-teal);
  margin-bottom: 2px;
}

.speaker-org {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.speaker-bio {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-body);
}

.speaker-quote {
  font-size: 13px;
  font-style: italic;
  color: var(--vinmec-blue);
  border-top: 1px dashed var(--border-color);
  margin-top: 16px;
  padding-top: 12px;
}

/* --- Section 9: Ai nên tham gia --- */
.audience {
  padding: 80px 0;
  background: var(--bg-main);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.audience-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  transition: all var(--transition-fast);
}

.audience-card:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 143, 161, 0.2);
  box-shadow: var(--shadow-sm);
}

.audience-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--vinmec-blue-light);
  color: var(--vinmec-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}

.audience-card h4 {
  font-size: 16px;
}

.audience-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- Section 10: Feedback --- */
.testimonials {
  padding: 80px 0;
  background: white;
}

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

.testimonial-card {
  padding: 32px;
}

.rating {
  color: #ffb500;
  font-size: 14px;
  margin-bottom: 12px;
}

.testimonial-text {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-body);
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.author-initial {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-main);
  color: var(--text-dark);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-info h5 {
  font-size: 13.5px;
}

.author-info p {
  font-size: 11.5px;
  color: var(--text-muted);
}

/* --- Section 11: Early Bird / Pricing --- */
.early-bird {
  padding: 80px 0;
  background: var(--bg-main);
}

.pricing-wrapper {
  max-width: 600px;
  margin: 0 auto;
  padding: 4px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--vinmec-teal), var(--vin-nexus-violet));
}

.pricing-card {
  background: white;
  border-radius: calc(var(--radius-lg) - 4px);
  padding: 44px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.pricing-title h3 {
  font-size: 24px;
  margin-bottom: 6px;
}

.pricing-title p {
  color: var(--text-muted);
  font-size: 14px;
}

.pricing-prices {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.price-original {
  font-size: 16px;
  text-decoration: line-through;
  color: var(--text-muted);
}

.price-current {
  font-size: 40px;
  font-weight: 800;
  color: var(--vinmec-teal);
  line-height: 1.1;
}

.price-meta {
  font-size: 13px;
  color: var(--text-muted);
}

.countdown-box {
  background: var(--bg-main);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--border-color);
}

.countdown-box h5 {
  font-size: 12.5px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.timer {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.timer-segment {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timer-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-dark);
}

.timer-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-top: 2px;
}

.timer-sep {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-muted);
  line-height: 1.1;
}

.limit-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--vinmec-blue-light);
  border-radius: 20px;
  color: var(--vinmec-blue);
  font-size: 13px;
  font-weight: 700;
  margin: 0 auto;
}

/* --- Section 12: FAQ --- */
.faq {
  padding: 80px 0;
  background: white;
}

.faq-wrapper {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-main);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-trigger {
  width: 100%;
  padding: 22px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  outline: none;
}

.faq-trigger h4 {
  font-size: 15.5px;
  font-weight: 700;
  padding-right: 20px;
}

.faq-icon-box {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: white;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-normal);
}

.faq-icon-box i {
  width: 14px;
  height: 14px;
  color: var(--text-muted);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease;
}

.faq-body {
  padding: 0 28px 22px 28px;
  font-size: 14px;
  color: var(--text-body);
  border-top: 1px dashed transparent;
}

/* FAQ Active Styles */
.faq-item.active {
  border-color: var(--vinmec-teal);
  background: white;
  box-shadow: var(--shadow-md);
}

.faq-item.active .faq-icon-box {
  transform: rotate(180deg);
  border-color: var(--vinmec-teal);
  background: var(--vinmec-teal);
  color: white;
}

.faq-item.active .faq-icon-box i {
  color: white;
}

.faq-item.active .faq-body {
  border-top-color: var(--border-color);
}

/* --- Section 13: CTA Cuối --- */
.cta-footer-section {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--vinmec-teal), var(--vinmec-blue));
  color: white;
  text-align: center;
}

.cta-footer-container {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.cta-footer-container h2 {
  font-size: 38px;
  color: white;
  letter-spacing: -0.5px;
}

.cta-footer-container p {
  font-size: 17px;
  opacity: 0.9;
  max-width: 580px;
}

.btn-cta-footer {
  background: white;
  color: var(--vinmec-blue);
  font-size: 16px;
  padding: 16px 36px;
}

.btn-cta-footer:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  background: var(--vinmec-blue-light);
}

/* --- Section: Form Đăng ký --- */
.register-section {
  padding: 80px 0;
  background: var(--bg-main);
}

.register-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.register-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.register-info h2 {
  font-size: 34px;
}

.register-info p {
  font-size: 15.5px;
}

.success-item-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 10px;
}

.success-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14.5px;
}

.success-item i {
  color: #00875a;
  flex-shrink: 0;
}

.form-card {
  padding: 40px;
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
}

.form-card h3 {
  font-size: 22px;
  text-align: center;
  margin-bottom: 6px;
}

.form-card p.sub-text {
  font-size: 13.5px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 28px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dark);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 16px;
  color: var(--text-muted);
  width: 18px;
  height: 18px;
  pointer-events: none;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 13px 16px 13px 46px;
  border-radius: var(--radius-sm);
  background: white;
  border: 1px solid #cbd5e1;
  color: var(--text-dark);
  font-size: 14.5px;
  transition: all var(--transition-fast);
  outline: none;
  appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 18px;
  padding-right: 40px;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--vinmec-teal);
  box-shadow: 0 0 0 3px rgba(0, 143, 161, 0.15);
}

.error-message {
  font-size: 12px;
  color: var(--vinmec-accent);
  display: none;
  margin-top: 4px;
}

.form-group.invalid input,
.form-group.invalid select {
  border-color: var(--vinmec-accent);
  background: rgba(223, 56, 56, 0.01);
}

.form-group.invalid .error-message {
  display: block;
}

.form-feedback {
  margin-top: 20px;
  padding: 16px;
  border-radius: var(--radius-sm);
  display: flex;
  gap: 12px;
  font-size: 13.5px;
  line-height: 1.5;
}

.form-feedback.success {
  background: rgba(0, 135, 90, 0.08);
  border: 1px solid rgba(0, 135, 90, 0.15);
  color: #006644;
}

.form-feedback.success i {
  color: #00875a;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.form-feedback.success h4 {
  font-size: 14.5px;
  color: #006644;
  margin-bottom: 4px;
}

.form-feedback.error {
  background: rgba(223, 56, 56, 0.08);
  border: 1px solid rgba(223, 56, 56, 0.15);
  color: #a82020;
}

.form-feedback.error i {
  color: var(--vinmec-accent);
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.form-feedback.error h4 {
  font-size: 14.5px;
  color: #a82020;
  margin-bottom: 4px;
}

.hidden {
  display: none !important;
}

/* Spinner Loader */
.loader {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
  margin-left: 8px;
}

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

/* --- Footer --- */
footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 80px 0 30px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-brand .logo-text {
  color: white;
}

.footer-desc {
  font-size: 14px;
  max-width: 480px;
  line-height: 1.6;
}

.footer-contacts {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-contacts h4 {
  color: white;
  font-size: 16px;
}

.contact-item {
  display: flex;
  gap: 12px;
  font-size: 14px;
}

.contact-item i {
  color: var(--vinmec-teal);
  flex-shrink: 0;
  margin-top: 3px;
}

.contact-item a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact-item a:hover {
  color: var(--vinmec-teal);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 30px;
  text-align: center;
  font-size: 12.5px;
  color: var(--text-muted);
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .hero-content {
    align-items: center;
  }
  
  .hero-desc {
    margin: 0 auto;
  }
  
  .hero-meta-grid {
    width: 100%;
    max-width: 580px;
  }
  
  .hero-visual-wrapper::before {
    display: none;
  }
  
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pain-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .science-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .benefits-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .speakers-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
  }
  
  .audience-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .testimonial-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .register-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  nav {
    display: none;
  }
  
  .hero {
    padding: 120px 0 60px 0;
  }
  
  .hero-content h1 {
    font-size: 32px;
  }
  
  .hero-meta-grid {
    grid-template-columns: 1fr;
  }
  
  .trust-grid {
    grid-template-columns: 1fr;
  }
  
  .inclusions-grid {
    grid-template-columns: 1fr;
  }
  
  .section-title h2 {
    font-size: 26px;
  }
  
  .pain-grid {
    grid-template-columns: 1fr;
  }
  
  .benefits-grid {
    grid-template-columns: 1fr;
  }
  
  .tabs-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .workshop-summary {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .curriculum-timeline::before {
    left: 20px;
  }
  
  .timeline-row {
    grid-template-columns: 1fr;
  }
  
  .time-tag {
    text-align: left;
    padding-left: 40px;
    padding-right: 0;
    margin-top: 10px;
    margin-bottom: -10px;
  }
  
  .timeline-card {
    padding: 20px 20px 20px 40px;
  }
  
  .diff-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .diff-table {
    min-width: 600px;
  }
  
  .diff-table th, .diff-table td {
    padding: 12px 16px;
    font-size: 13px;
  }
  
  .diff-table th.col-feature, .diff-table td.cell-feature {
    width: 40%;
  }
  
  .speaker-card {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 24px;
  }
  
  .speaker-avatar-box {
    margin-bottom: 8px;
  }
  
  .audience-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card {
    padding: 24px;
  }
  
  .price-current {
    font-size: 32px;
  }
  
  .timer {
    gap: 8px;
  }
  
  .timer-num {
    font-size: 22px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}