/* Extension Vietnam — Batch Image Automation 
   Official Website Styling System (extensionvietnam.com) */

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary: #0f172a;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --border-focus: #3b82f6;
  --success: #10b981;
  --success-bg: #ecfdf5;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --container-max: 1120px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
header.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--secondary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.1rem;
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

nav.main-nav a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.btn-secondary {
  background: #f1f5f9;
  color: var(--secondary);
}

.btn-secondary:hover {
  background: #e2e8f0;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, #e0e7ff 0%, #f8fafc 70%);
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: #e0e7ff;
  color: #3730a3;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--secondary);
  max-width: 820px;
  margin: 0 auto 20px;
  letter-spacing: -0.02em;
}

.hero p.lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

/* Feature Grid */
.section {
  padding: 70px 0;
}

.section-title {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 12px;
}

.section-title p {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 28px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  background: var(--primary-light);
  color: var(--primary);
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--secondary);
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Security Box */
.security-highlight {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 48px;
  margin: 50px 0;
}

.security-highlight h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #38bdf8;
}

.security-highlight p {
  color: #cbd5e1;
  font-size: 1.05rem;
  margin-bottom: 24px;
  max-width: 800px;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.security-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px;
  border-radius: var(--radius-md);
}

.security-item h4 {
  color: #f8fafc;
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.security-item p {
  font-size: 0.9rem;
  color: #94a3b8;
  margin: 0;
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 36px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary), var(--shadow-lg);
}

.pricing-card .badge-top {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 12px;
  border-radius: 9999px;
}

.pricing-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 40px;
  margin-bottom: 20px;
}

.pricing-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 4px;
}

.pricing-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--text-main);
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid #f1f5f9;
}

.pricing-features li:last-child {
  border-bottom: none;
}

.check-icon {
  color: var(--success);
  font-weight: 700;
}

/* Legal & Policy Pages Layout */
.page-header {
  padding: 50px 0 30px;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.page-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 8px;
}

.page-header p.sub {
  font-size: 1rem;
  color: var(--text-muted);
}

.legal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 60px;
}

.legal-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--secondary);
  margin: 32px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.legal-content h2:first-of-type {
  margin-top: 0;
}

.legal-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--secondary);
  margin: 20px 0 10px;
}

.legal-content p, .legal-content ul, .legal-content ol {
  font-size: 0.98rem;
  color: #334155;
  line-height: 1.7;
  margin-bottom: 16px;
}

.legal-content ul, .legal-content ol {
  padding-left: 24px;
}

.legal-content li {
  margin-bottom: 8px;
}

/* Alert Boxes */
.alert {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin: 20px 0;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.alert-info {
  background: var(--primary-light);
  border: 1px solid #bfdbfe;
  color: #1e40af;
}

.alert-success {
  background: var(--success-bg);
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.alert-warning {
  background: var(--warning-bg);
  border: 1px solid #fde68a;
  color: #92400e;
}

/* Payment & QR Box */
.pay-box {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin: 30px auto;
  max-width: 780px;
  box-shadow: var(--shadow-md);
}

.qr-display-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: #f8fafc;
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  margin: 24px 0;
}

.qr-image {
  max-width: 240px;
  height: auto;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  background: #ffffff;
  padding: 8px;
}

.bank-info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.bank-info-table th,
.bank-info-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.bank-info-table th {
  color: var(--text-muted);
  font-weight: 500;
  width: 35%;
}

.bank-info-table td {
  color: var(--secondary);
  font-weight: 600;
}

.code-badge {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background: #f1f5f9;
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 4px;
  color: #0f172a;
  font-weight: 700;
  font-size: 1rem;
}

/* Language switch / toggle tabs */
.lang-section {
  margin: 40px 0;
}

.lang-header {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #f1f5f9;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

/* Footer */
footer.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 320px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.15s;
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-wrap {
    flex-direction: column;
    height: auto;
    padding: 16px 0;
    gap: 12px;
  }
  nav.main-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .legal-content {
    padding: 24px;
  }
}