/* =========================================================
   ARPA MICROSITE — MONOCHROME SLATE & ACADEMIC GREY THEME
   Primary Color: Slate Gray (#475569, #334155, #1E293B)
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&display=swap');

:root {
  /* ARPA Slate Gray Palette */
  --arpa-slate-dark: #0F172A;      /* Deep Slate Obsidian */
  --arpa-slate-main: #334155;      /* Main Accent Gray */
  --arpa-slate-medium: #475569;    /* Secondary Gray */
  --arpa-slate-light: #F1F5F9;     /* Light Gray Background Tint */
  --arpa-slate-border: #E2E8F0;    /* Soft Gray Divider */
  
  /* Text Colors */
  --arpa-text-dark: #0F172A;
  --arpa-text-muted: #64748B;
  
  /* Radius & Transitions */
  --radius-xl: 20px;
  --radius-lg: 14px;
  --radius-md: 10px;
  --shadow-sm: 0 4px 14px rgba(15, 23, 42, 0.05);
  --shadow-hover: 0 16px 32px rgba(51, 65, 85, 0.12);
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* BASE RESET */
body {
  background-color: #F8FAFC;
  color: var(--arpa-text-dark);
  font-family: 'Plus Jakarta Sans', -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

.arpa-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

/* BADGES */
.badge-slate {
  background: var(--arpa-slate-light);
  color: var(--arpa-slate-main);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 30px;
  border: 1px solid var(--arpa-slate-border);
  display: inline-block;
}

/* 1. HERO STAGE */
.arpa-hero {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--arpa-slate-light) 100%);
  padding: 72px 0;
  text-align: center;
  border-bottom: 2px solid var(--arpa-slate-border);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--arpa-slate-dark);
  margin: 12px 0 0 0;
  letter-spacing: -1.5px;
}

.accent-text {
  color: var(--arpa-slate-medium);
}

.hero-tagline {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--arpa-slate-main);
  margin: 4px 0 16px 0;
}

.hero-desc {
  font-size: 0.98rem;
  color: var(--arpa-text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary-slate {
  background: var(--arpa-slate-dark);
  color: #FFFFFF !important;
  font-weight: 800;
  font-size: 0.92rem;
  padding: 14px 28px;
  border-radius: 30px;
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.2);
  transition: var(--transition-smooth);
}

.btn-primary-slate:hover {
  background: var(--arpa-slate-main);
  transform: translateY(-2px);
}

.btn-secondary-slate {
  background: #FFFFFF;
  color: var(--arpa-slate-dark) !important;
  border: 1.5px solid var(--arpa-slate-border);
  font-weight: 800;
  font-size: 0.92rem;
  padding: 14px 28px;
  border-radius: 30px;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.btn-secondary-slate:hover {
  background: var(--arpa-slate-light);
  border-color: var(--arpa-slate-medium);
}

/* 2. SECTION GENERAL */
.arpa-section {
  padding: 64px 0;
}

.light-slate-bg {
  background: var(--arpa-slate-light);
  border-top: 1px solid var(--arpa-slate-border);
  border-bottom: 1px solid var(--arpa-slate-border);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px auto;
}

.section-header h2 {
  font-size: 2.1rem;
  font-weight: 900;
  color: var(--arpa-slate-dark);
  margin: 10px 0 8px 0;
  letter-spacing: -0.6px;
}

.section-header p {
  color: var(--arpa-text-muted);
  font-size: 0.96rem;
  margin: 0;
}

/* 3. PROGRAM SPESIAL GRID */
.special-program-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.special-card {
  background: #FFFFFF;
  border: 1.5px solid var(--arpa-slate-border);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.special-card:hover {
  transform: translateY(-6px);
  border-color: var(--arpa-slate-main);
  box-shadow: var(--shadow-hover);
}

.special-badge {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--arpa-slate-main);
  background: var(--arpa-slate-light);
  padding: 4px 10px;
  border-radius: 6px;
  width: fit-content;
  margin-bottom: 12px;
}

.special-card h3 {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--arpa-slate-dark);
  margin: 0;
}

.special-sub {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--arpa-slate-medium);
  margin: 2px 0 14px 0;
}

.special-desc {
  font-size: 0.9rem;
  color: var(--arpa-text-muted);
  line-height: 1.6;
  margin: 0 0 24px 0;
}

.btn-link-slate {
  color: var(--arpa-slate-dark);
  font-weight: 800;
  font-size: 0.9rem;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.btn-link-slate:hover {
  color: var(--arpa-slate-medium);
  padding-left: 4px;
}

/* 4. SEGMENTATION GRID */
.segment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.segment-card {
  background: #FFFFFF;
  border: 1.5px solid var(--arpa-slate-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.segment-card:hover {
  transform: translateY(-4px);
  border-color: var(--arpa-slate-main);
}

.segment-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.segment-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--arpa-slate-dark);
  margin: 0 0 8px 0;
}

.segment-card p {
  font-size: 0.88rem;
  color: var(--arpa-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* 5. GATEWAY CARDS */
.gateway-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.gateway-card {
  background: #FFFFFF;
  border: 1.5px solid var(--arpa-slate-border);
  border-radius: var(--radius-xl);
  padding: 28px;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.gateway-card:hover {
  transform: translateY(-6px);
  border-color: var(--arpa-slate-dark);
  box-shadow: var(--shadow-hover);
}

.gateway-card h3 {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--arpa-slate-dark);
  margin: 0 0 8px 0;
}

.gateway-card p {
  font-size: 0.88rem;
  color: var(--arpa-text-muted);
  line-height: 1.5;
  margin: 0 0 18px 0;
}

.gateway-arrow {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--arpa-slate-medium);
}

/* 6. SUB-HEADER INTERNAL ARPA (BARIS 2) */
.arpa-subnav-bar {
  background: #FFFFFF;
  border-bottom: 2px solid var(--arpa-slate-border);
  position: sticky;
  top: 0;
  z-index: 998;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
}

.subnav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 24px;
}

.subnav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.subnav-brand .brand-text {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--arpa-slate-dark);
  letter-spacing: -0.5px;
}

.subnav-brand .brand-badge {
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--arpa-slate-main);
  background: var(--arpa-slate-light);
  padding: 2px 8px;
  border-radius: 20px;
  border: 1px solid var(--arpa-slate-border);
}

.subnav-menu {
  display: flex;
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  gap: 4px;
}

.subnav-menu a {
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--arpa-text-muted);
  padding: 6px 14px;
  border-radius: 20px;
  transition: var(--transition-smooth);
}

.subnav-menu a:hover,
.subnav-menu a.active {
  color: #FFFFFF !important;
  background: var(--arpa-slate-dark);
}

@media (max-width: 992px) {
  .hero-title {
    font-size: 2.6rem;
  }
  .subnav-container {
    flex-direction: column;
    gap: 8px;
  }
}