/* ==========================================================================
   DESIGN TOKENS (Konsisten dengan Brand Guidelines STDI)
   ========================================================================== */
:root {
  --color-primary: #0047BB;
  --color-royal-dark: #001489;
  --color-horizon-light: #6CACE4;

  --color-gold-bronze: #CBA052;
  --color-gold-earth: #886B25;
  --color-gold-chalky: #ECD898;

  --color-frosted-black: #101820;
  --color-grey-olive: #8A8D8F;
  --color-bright-snow: #F8F8F8;
  --color-shade-light: #E2E8F0;
  --color-card-light: #FFFFFF;
  --color-shade-dark: #182430;
  --color-card-dark: #2A3847;

  --color-body-text: #334155;
  --color-heading-text: #101820;
  --color-on-primary: #FFFFFF;
  --color-on-gold: #101820;
  --color-header-bg: rgba(255, 255, 255, 0.98);
  --color-glass-bg: rgba(255, 255, 255, 0.88);

  --grad-blue: linear-gradient(135deg, #6CACE4 0%, #0047BB 50%, #001489 100%);
  --grad-gold: linear-gradient(135deg, #ECD898 0%, #CBA052 50%, #886B25 100%);
  --grad-tint: linear-gradient(135deg, rgba(0, 71, 187, 0.04) 0%, rgba(203, 160, 82, 0.06) 100%);

  --font-heading: 'Readex Pro', sans-serif;
  --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-arabic: 'Noto Naskh Arabic', serif;

  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;

  --radius-full: 9999px;
  --radius-card: 26px;
  --radius-surface: 18px;
  --radius-sm: 12px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.03), 0 0 0 1px rgba(16, 24, 32, 0.05);
  --shadow-hover: 0 16px 24px -4px rgba(0, 0, 0, 0.09), 0 0 0 1px rgba(16, 24, 32, 0.06);
  --shadow-btn: 0 4px 14px rgba(0, 71, 187, 0.22);
}

.section-header {
  margin-bottom: var(--space-lg);
}
.section-header.text-center {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.section-header h2 {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  margin-top: var(--space-xs);
  margin-bottom: var(--space-sm);
}
.section-lead {
  max-width: 700px;
  margin: 0 auto;
  color: var(--color-body-text);
  font-size: 0.95rem;
  line-height: 1.6;
}

.sejarah-kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-gold-earth);
}

.badge-gold {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background-color: rgba(203, 160, 82, 0.12);
  color: var(--color-gold-earth);
  border: 1px solid rgba(203, 160, 82, 0.35);
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-body);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.sejarah-hero {
  background: var(--grad-blue);
  color: #FFFFFF;
  padding-top: clamp(52px, 7vw, 92px);
  padding-bottom: clamp(48px, 6vw, 84px);
  text-align: center;
}
.sejarah-hero .badge-gold {
  background-color: rgba(236, 216, 152, 0.2);
  color: #FFFFFF;
  border-color: rgba(236, 216, 152, 0.6);
  backdrop-filter: blur(8px);
}
.sejarah-hero h1 {
  color: #FFFFFF;
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  margin-top: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.sejarah-hero-intro {
  max-width: 780px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.7;
}

.sejarah-hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-lg);
}

.hero-stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.28);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: #FFFFFF;
}
.hero-stat-year {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-gold-chalky);
}

/* ==========================================================================
   TIMELINE SECTION
   ========================================================================== */
.sejarah-timeline-section {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-lg);
}

.sejarah-timeline {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  padding-left: 28px;
}
.sejarah-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 9px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-gold-bronze), rgba(203, 160, 82, 0.25));
  border-radius: var(--radius-full);
}

.sejarah-tl-item {
  position: relative;
  margin-bottom: var(--space-md);
}

.sejarah-tl-marker {
  position: absolute;
  left: -28px;
  top: 28px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sejarah-tl-dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-card-light);
  border: 3px solid var(--color-gold-bronze);
  box-shadow: 0 0 0 4px rgba(203, 160, 82, 0.2);
}

.sejarah-tl-card {
  background-color: var(--color-card-light);
  border: 1px solid var(--color-shade-light);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-md) var(--space-lg);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease;
}
.sejarah-tl-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.sejarah-tl-year {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-on-gold);
  background: var(--grad-gold);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-xs);
}

.sejarah-tl-card h3 {
  margin: 0 0 6px 0;
  font-size: 1.15rem;
  color: var(--color-heading-text);
}
.sejarah-tl-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-body-text);
}

/* ==========================================================================
   NARRATIVE SECTION
   ========================================================================== */
.sejarah-narrative-section {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-xl);
}

.sejarah-narrative {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.sejarah-narrative-block {
  background-color: var(--color-card-light);
  border: 1px solid var(--color-shade-light);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: clamp(28px, 4vw, 44px);
  scroll-margin-top: calc(var(--header-height, 76px) + 24px);
}

.sejarah-narrative-block h3 {
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  margin: 0 0 var(--space-sm) 0;
  color: var(--color-heading-text);
  position: relative;
  padding-bottom: var(--space-xs);
}
.sejarah-narrative-block h3::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background: var(--grad-gold);
  border-radius: var(--radius-full);
  margin-top: var(--space-xs);
}

.sejarah-narrative-block > p {
  margin: 0 0 var(--space-sm) 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-body-text);
}
.sejarah-narrative-block > p:last-child {
  margin-bottom: 0;
}

.sejarah-section-intro {
  font-weight: 600;
  color: var(--color-heading-text) !important;
}

/* Numbered list (alasan pendirian) */
.sejarah-list {
  list-style: none;
  margin: var(--space-sm) 0 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sejarah-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-body-text);
}
.sejarah-list-num {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: rgba(0, 71, 187, 0.08);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 2px;
}

/* Phase grid */
.sejarah-phase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.sejarah-phase-card {
  background: var(--grad-tint);
  border: 1px solid var(--color-shade-light);
  border-radius: var(--radius-surface);
  padding: var(--space-md);
  text-align: center;
}
.sejarah-phase-num {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold-earth);
  margin-bottom: var(--space-xs);
}
.sejarah-phase-card h4 {
  margin: 0 0 6px 0;
  font-size: 1rem;
  color: var(--color-heading-text);
}
.sejarah-phase-card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--color-body-text);
}

/* Prodi grid */
.sejarah-prodi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.sejarah-prodi-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-bright-snow);
  border: 1px solid var(--color-shade-light);
  border-radius: var(--radius-surface);
  padding: var(--space-md);
}
.sejarah-prodi-ico {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(0, 71, 187, 0.08);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sejarah-prodi-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sejarah-prodi-text strong {
  font-size: 0.925rem;
  color: var(--color-heading-text);
}
.sejarah-prodi-text em {
  font-family: var(--font-arabic);
  font-style: normal;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-gold-earth);
}

/* I'dad card */
.sejarah-idad-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  padding: var(--space-md);
  background: rgba(203, 160, 82, 0.08);
  border-left: 4px solid var(--color-gold-bronze);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.sejarah-idad-ico {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(203, 160, 82, 0.16);
  color: var(--color-gold-earth);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sejarah-idad-text strong {
  font-size: 0.95rem;
  color: var(--color-heading-text);
}
.sejarah-idad-text p {
  margin: 6px 0 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-body-text);
}

/* ==========================================================================
   DOCUMENTS SECTION
   ========================================================================== */
.sejarah-documents-section {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-2xl);
}

.sejarah-doc-grid {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.sejarah-doc-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background-color: var(--color-card-light);
  border: 1px solid var(--color-shade-light);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: var(--space-md);
  text-decoration: none;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}
.sejarah-doc-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 71, 187, 0.3);
}

.sejarah-doc-card.is-soon {
  cursor: not-allowed;
  border-style: dashed;
  border-color: var(--color-shade-light);
  background-color: transparent;
  opacity: 0.85;
}
.sejarah-doc-card.is-soon:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
  border-color: var(--color-shade-light);
}
.sejarah-doc-card.is-soon .sejarah-doc-ico {
  background: rgba(138, 141, 143, 0.12);
  color: var(--color-grey-olive);
}

.sejarah-soon-pill {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-grey-olive);
  background: rgba(138, 141, 143, 0.12);
  border: 1px solid var(--color-shade-light);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.sejarah-doc-ico {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0, 71, 187, 0.08);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sejarah-doc-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.sejarah-doc-text strong {
  font-size: 0.925rem;
  line-height: 1.4;
  color: var(--color-heading-text);
}
.sejarah-doc-text small {
  font-size: 0.8rem;
  color: var(--color-grey-olive);
}
.sejarah-doc-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 768px) {
  .sejarah-phase-grid,
  .sejarah-prodi-grid {
    grid-template-columns: 1fr;
  }
  .sejarah-doc-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .sejarah-hero-stats {
    flex-direction: column;
  }
  .sejarah-doc-card {
    flex-wrap: wrap;
  }
  .sejarah-doc-link {
    width: 100%;
  }
}

/* ==========================================================================
   DARK MODE
   ========================================================================== */
html[data-theme="dark"] {
  color-scheme: dark;
  --color-primary: #6FA8E4;
  --color-royal-dark: #9CC3F0;
  --color-horizon-light: #A9CDF2;
  --color-gold-bronze: #D9B87A;
  --color-gold-earth: #CBAF79;
  --color-gold-chalky: #E8CF97;
  --color-frosted-black: #EAF1FA;
  --color-heading-text: #EAF1FA;
  --color-grey-olive: #9FB0C6;
  --color-bright-snow: #0B1220;
  --color-shade-light: #26344A;
  --color-card-light: #141D2E;
  --color-shade-dark: #05090F;
  --color-card-dark: #1D2A3E;
  --color-body-text: #C3D0E0;
  --color-on-primary: #0B1220;
  --color-on-gold: #101820;
  --color-header-bg: rgba(11, 18, 32, 0.92);
  --color-glass-bg: rgba(20, 29, 46, 0.82);
  --grad-tint: linear-gradient(135deg, rgba(111, 168, 228, 0.08) 0%, rgba(217, 184, 122, 0.08) 100%);
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.45), 0 2px 4px -2px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.05);
  --shadow-hover: 0 16px 24px -4px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.08);
}

html[data-theme="dark"] .sejarah-prodi-card {
  background-color: rgba(255, 255, 255, 0.03);
}
html[data-theme="dark"] .sejarah-list-num {
  background: rgba(111, 168, 228, 0.14);
  color: var(--color-primary);
}
html[data-theme="dark"] .sejarah-tl-dot {
  background: var(--color-gold-bronze);
  border-color: var(--color-gold-chalky);
  box-shadow: 0 0 0 4px rgba(217, 184, 122, 0.2);
}

@media (prefers-color-scheme: dark) {
  html[data-theme="auto"] {
    color-scheme: dark;
    --color-primary: #6FA8E4;
    --color-royal-dark: #9CC3F0;
    --color-horizon-light: #A9CDF2;
    --color-gold-bronze: #D9B87A;
    --color-gold-earth: #CBAF79;
    --color-gold-chalky: #E8CF97;
    --color-frosted-black: #EAF1FA;
    --color-heading-text: #EAF1FA;
    --color-grey-olive: #9FB0C6;
    --color-bright-snow: #0B1220;
    --color-shade-light: #26344A;
    --color-card-light: #141D2E;
    --color-shade-dark: #05090F;
    --color-card-dark: #1D2A3E;
    --color-body-text: #C3D0E0;
    --color-on-primary: #0B1220;
    --color-on-gold: #101820;
    --color-header-bg: rgba(11, 18, 32, 0.92);
    --color-glass-bg: rgba(20, 29, 46, 0.82);
    --grad-tint: linear-gradient(135deg, rgba(111, 168, 228, 0.08) 0%, rgba(217, 184, 122, 0.08) 100%);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.45), 0 2px 4px -2px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.05);
    --shadow-hover: 0 16px 24px -4px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.08);
  }
  html[data-theme="auto"] .sejarah-prodi-card {
    background-color: rgba(255, 255, 255, 0.03);
  }
  html[data-theme="auto"] .sejarah-list-num {
    background: rgba(111, 168, 228, 0.14);
    color: var(--color-primary);
  }
  html[data-theme="auto"] .sejarah-tl-dot {
    background: var(--color-gold-bronze);
    border-color: var(--color-gold-chalky);
    box-shadow: 0 0 0 4px rgba(217, 184, 122, 0.2);
  }
}