/* ===================================================================
   THE SOLO OS — BỘ CHÍNH SÁCH GIAO DỊCH (VIBE CODING DESIGN SYSTEM)
   Fonts: Big Shoulders Display (Headlines/Badges/CTA) | Inter (Body/UI) | Cormorant Garamond (Quotes)
   Palette: Obsidian #0B0908 | Warm Paper #F4EDE3 | Paper Alt #EBE2D5 | Terracotta #B8552F | Slate #2C4A5C
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Big+Shoulders+Display:wght@400;500;600;700;800;900&family=Cormorant+Garamond:ital,wght@0,500;0,600;0,700;1,400;1,600&family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --font-display: 'Big Shoulders Display', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Cormorant Garamond', Georgia, serif;

  --bg-dark: #0B0908;
  --bg-dark-surface: #14100D;
  --bg-dark-card: #1A1410;
  --bg-dark-border: rgba(244, 237, 227, 0.12);

  --bg-paper: #F4EDE3;
  --bg-paper-alt: #EBE2D5;
  --bg-paper-card: #FFFFFF;
  --border-paper: #E2D7C8;
  --border-paper-dark: #CFC1AF;

  --color-terracotta: #B8552F;
  --color-terracotta-hover: #9E4321;
  --color-terracotta-light: #F7EDE8;
  --color-terracotta-tint: rgba(184, 85, 47, 0.08);

  --color-slate: #2C4A5C;
  --color-slate-light: #3D647C;
  --color-slate-tint: rgba(44, 74, 92, 0.08);

  --text-dark-primary: #14100D;
  --text-dark-secondary: #5A524A;
  --text-dark-muted: #847B71;

  --text-light-primary: #F4EDE3;
  --text-light-secondary: #C8BFB5;
  --text-light-muted: #8C8277;

  --shadow-paper: 0 10px 30px -10px rgba(20, 16, 13, 0.08), 0 2px 6px rgba(20, 16, 13, 0.04);
  --shadow-paper-hover: 0 16px 40px -10px rgba(20, 16, 13, 0.14), 0 4px 12px rgba(20, 16, 13, 0.06);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --max-width: 1180px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark-primary);
  background-color: var(--bg-paper);
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Grain Overlay */
.grain-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Header (Vibe Coding Top Bar) */
.top-bar {
  background: var(--bg-dark);
  border-bottom: 1px solid var(--bg-dark-border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background-color: rgba(11, 9, 8, 0.94);
}

.top-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.top-bar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.top-bar-logo {
  height: 32px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  display: block;
}

.brand-divider {
  color: rgba(244, 237, 227, 0.25);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.brand-course-tag {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-light-secondary);
  text-transform: uppercase;
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.top-link {
  color: var(--text-light-secondary);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.2s ease;
}

.top-link:hover {
  color: var(--color-terracotta);
}

.top-bar-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--color-terracotta);
  color: #FFF !important;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.2s ease;
}

.top-bar-cta:hover {
  background: var(--color-terracotta-hover);
  transform: translateY(-1px);
}

/* Layout Container */
.layout-container {
  max-width: var(--max-width);
  margin: 36px auto 64px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 290px 1fr;
  gap: 32px;
  align-items: start;
}

/* Breadcrumb */
.breadcrumb-wrap {
  grid-column: 1 / -1;
  font-size: 0.88rem;
  color: var(--text-dark-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  font-weight: 500;
}

.breadcrumb-wrap a {
  color: var(--color-terracotta);
  text-decoration: none;
  font-weight: 600;
}

.breadcrumb-wrap a:hover {
  text-decoration: underline;
}

/* Sidebar Navigation */
.policy-sidebar {
  position: sticky;
  top: 86px;
  background: #FFFFFF;
  border: 1.5px solid var(--border-paper);
  border-radius: var(--radius-sm);
  padding: 20px;
  box-shadow: var(--shadow-paper);
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dark-primary);
  border-bottom: 1.5px solid var(--border-paper);
  padding-bottom: 12px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.policy-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.policy-nav-item a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-dark-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.35;
  transition: all 0.15s ease;
}

.policy-nav-item a:hover {
  background: var(--bg-paper-alt);
  color: var(--text-dark-primary);
}

.policy-nav-item.active a {
  background: var(--bg-dark);
  color: var(--text-light-primary) !important;
  border-left: 3px solid var(--color-terracotta);
  font-weight: 700;
}

.nav-idx {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  background: var(--bg-paper-alt);
  color: var(--color-slate);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.policy-nav-item.active .nav-idx {
  background: var(--color-terracotta);
  color: #FFFFFF;
}

.sidebar-contact-card {
  background: var(--bg-paper);
  border: 1px solid var(--border-paper);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-top: 18px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-dark-secondary);
}

.sidebar-contact-card p {
  margin-bottom: 4px;
}

.sidebar-contact-card a {
  color: var(--color-terracotta);
  font-weight: 700;
  text-decoration: underline;
}

/* Main Content Card */
.policy-content-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-paper);
  border-radius: var(--radius-sm);
  padding: 44px 40px;
  box-shadow: var(--shadow-paper);
}

.policy-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.policy-badge {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-terracotta);
  background: var(--color-terracotta-light);
  border: 1px solid rgba(184, 85, 47, 0.2);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.policy-date {
  font-size: 0.85rem;
  color: var(--text-dark-muted);
  font-weight: 600;
}

/* Typography (Vibe Coding Brutalist) */
.policy-content-card h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 900;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-dark-primary);
  line-height: 1.15;
  margin-bottom: 24px;
}

.policy-content-card h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 900;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-slate);
  border-bottom: 2px solid var(--border-paper);
  padding-bottom: 8px;
  margin: 36px 0 16px;
}

.policy-content-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-terracotta);
  margin: 24px 0 10px;
}

.policy-content-card p {
  color: var(--text-dark-primary);
  line-height: 1.75;
  margin-bottom: 16px;
  font-size: 1rem;
}

.policy-content-card ul, .policy-content-card ol {
  margin: 12px 0 20px 24px;
  color: var(--text-dark-primary);
}

.policy-content-card li {
  margin-bottom: 8px;
  line-height: 1.65;
}

.policy-content-card strong {
  color: var(--text-dark-primary);
  font-weight: 700;
}

/* Callout Boxes */
.note-box {
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 22px 0;
  font-size: 0.95rem;
  line-height: 1.65;
}

.alert-warning {
  background: var(--color-terracotta-light);
  border-left: 4px solid var(--color-terracotta);
  color: var(--text-dark-primary);
}

.alert-success {
  background: rgba(44, 74, 92, 0.08);
  border-left: 4px solid var(--color-slate);
  color: var(--text-dark-primary);
}

/* Process Steps in Complaint Policy */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 20px 0 24px;
}

.step-card {
  background: var(--bg-paper);
  border: 1.5px solid var(--border-paper);
  border-radius: var(--radius-sm);
  padding: 18px;
  position: relative;
}

.step-badge {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 900;
  text-transform: uppercase;
  color: #FFFFFF;
  background: var(--color-terracotta);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 8px;
}

.step-card h4 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-dark-primary);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--text-dark-secondary);
  line-height: 1.55;
  margin: 0;
}

/* Founder / Legal Identity Card */
.founder-card {
  background: var(--bg-paper-alt);
  border: 1.5px solid var(--border-paper-dark);
  border-radius: var(--radius-sm);
  padding: 22px 26px;
  margin: 24px 0 32px;
}

.founder-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1.5px solid var(--border-paper);
  padding-bottom: 14px;
  margin-bottom: 16px;
}

.founder-avatar {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-terracotta);
  background: #FFF;
}

.founder-card-name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--text-dark-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.founder-card-role {
  font-size: 0.85rem;
  color: var(--color-terracotta);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.founder-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  font-size: 0.92rem;
}

.founder-card-row span {
  color: var(--text-dark-muted);
}

.founder-card-row strong {
  color: var(--text-dark-primary);
}

.founder-card-row a {
  color: var(--color-terracotta);
  font-weight: 700;
  text-decoration: underline;
}

/* Hub Grid (Cards on /chinh-sach/) */
.policy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 28px 0;
}

.hub-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-paper);
  border-radius: var(--radius-sm);
  padding: 24px;
  box-shadow: var(--shadow-paper);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
}

.hub-card:hover {
  border-color: var(--color-terracotta);
  transform: translateY(-2px);
  box-shadow: var(--shadow-paper-hover);
}

.hub-card-badge {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 900;
  color: var(--color-terracotta);
  background: var(--color-terracotta-light);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.hub-card-title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 900;
  text-transform: uppercase;
  color: var(--text-dark-primary);
  line-height: 1.25;
  margin-bottom: 8px;
}

.hub-card-desc {
  font-size: 0.92rem;
  color: var(--text-dark-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.hub-card-arrow {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-terracotta);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Pagination (Prev/Next) */
.policy-pagination {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1.5px solid var(--border-paper);
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg-paper);
  border: 1.5px solid var(--border-paper);
  border-radius: var(--radius-sm);
  color: var(--text-dark-primary);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: all 0.2s ease;
}

.pagination-btn:hover {
  border-color: var(--color-terracotta);
  color: var(--color-terracotta);
  background: #FFFFFF;
}

/* Site Footer (Vibe Coding Footer) */
.site-footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--bg-dark-border);
  padding: 60px 0 36px;
  color: var(--text-light-secondary);
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 24px;
}

.footer-logo {
  height: 32px;
  width: auto;
  max-width: 140px;
  display: block;
}

.footer-brand-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-light-primary);
  text-transform: uppercase;
}

.footer-disclaimer {
  font-size: 0.88rem;
  color: var(--text-light-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  max-width: 800px;
}

.footer-policies-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 20px 0;
  border-top: 1px solid var(--bg-dark-border);
  border-bottom: 1px solid var(--bg-dark-border);
  margin-bottom: 24px;
  font-size: 0.88rem;
}

.footer-policies-grid a {
  color: var(--text-light-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

.footer-policies-grid a:hover {
  color: var(--color-terracotta);
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-light-muted);
}

/* Responsive */
@media (max-width: 900px) {
  .layout-container {
    grid-template-columns: 1fr;
    margin-top: 24px;
  }
  .policy-sidebar {
    position: static;
    order: 2;
  }
  .policy-content-card {
    padding: 28px 20px;
  }
  .top-link {
    display: none;
  }
}