/* ===== ROOT VARIABLES ===== */
:root {
  --primary: #0078d4;
  --primary-dark: #005a9e;
  --primary-light: #2899f5;
  --secondary: #1a1a2e;
  --accent: #50e6ff;
  --accent2: #b4a7f5;
  --bg: #0d0d1a;
  --bg2: #111128;
  --surface: #1a1a35;
  --surface2: #222245;
  --border: rgba(255,255,255,0.08);
  --text: #e8eaf0;
  --text-muted: #8892b0;
  --success: #57d9a3;
  --warning: #ffd700;
  --danger: #ff6b6b;
  --purple: #b4a7f5;
  --green: #57d9a3;
  --orange: #ffa94d;
  --gradient: linear-gradient(135deg, #0078d4, #50e6ff);
  --gradient2: linear-gradient(135deg, #b4a7f5, #0078d4);
  --shadow: 0 8px 32px rgba(0,120,212,0.15);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }
ul { list-style: none; }
img { max-width: 100%; }
code {
  font-family: 'JetBrains Mono', monospace;
  background: rgba(80,230,255,0.1);
  color: var(--accent);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.88em;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 4px; }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== CONTAINER ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: 0 4px 20px rgba(0,120,212,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,120,212,0.5);
  color: white;
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-outline:hover {
  background: var(--accent);
  color: var(--bg);
  transform: translateY(-2px);
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(13, 13, 26, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled { padding: 10px 0; box-shadow: var(--shadow); }
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  color: var(--text);
  font-weight: 400;
}
.nav-brand strong { color: var(--accent); }
.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: white;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: rgba(255,255,255,0.08);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 100px 24px 60px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(0,120,212,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(180,167,245,0.1) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 50% 0%, rgba(80,230,255,0.08) 0%, transparent 60%);
}
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--accent);
  border-radius: 50%;
  animation: float linear infinite;
  opacity: 0.4;
}
@keyframes float {
  0% { transform: translateY(100vh) translateX(0); opacity: 0; }
  10% { opacity: 0.4; }
  90% { opacity: 0.4; }
  100% { transform: translateY(-10vh) translateX(50px); opacity: 0; }
}
.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
  width: 100%;
}
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0,120,212,0.2);
  border: 1px solid rgba(0,120,212,0.4);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.1;
  margin-bottom: 24px;
  grid-column: span 1;
}
.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 500px;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
}
.stat-item { text-align: left; }
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== AD DIAGRAM (Hero visual) ===== */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.ad-diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-lg);
}
.diagram-forest {
  border: 2px solid rgba(80,230,255,0.4);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}
.diagram-forest > span {
  display: block;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}
.diagram-domain {
  border: 2px solid rgba(0,120,212,0.5);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
}
.diagram-domain > span {
  display: block;
  font-size: 0.85rem;
  color: var(--primary-light);
  font-weight: 600;
  margin-bottom: 12px;
}
.diagram-ous {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.diagram-ou {
  background: rgba(0,120,212,0.15);
  border: 1px solid rgba(0,120,212,0.3);
  border-radius: 8px;
  padding: 8px 4px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  transition: var(--transition);
}
.diagram-ou:hover {
  background: rgba(0,120,212,0.3);
  transform: translateY(-2px);
}

/* ===== SECTIONS ===== */
.section {
  padding: 100px 0;
  position: relative;
}
.section-alt { background: var(--bg2); }
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-badge {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0,120,212,0.15);
  border: 1px solid rgba(0,120,212,0.3);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}
.subsection-title {
  font-size: 1.4rem;
  margin-bottom: 24px;
  margin-top: 48px;
}

/* ===== CARDS ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}
.card-blue::before { background: var(--primary); }
.card-purple::before { background: var(--purple); }
.card-green::before { background: var(--success); }
.card-orange::before { background: var(--orange); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(0,120,212,0.3); }
.card-icon { font-size: 2rem; margin-bottom: 16px; }
.card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.card p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }

/* ===== TIMELINE ===== */
.timeline-section { margin-top: 60px; }
.timeline {
  position: relative;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), transparent);
}
.timeline-item {
  position: relative;
  margin-bottom: 32px;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 20px;
  align-items: start;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -34px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid var(--bg);
  box-shadow: 0 0 10px var(--primary);
}
.timeline-year {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  padding-top: 4px;
}
.timeline-content h4 { font-size: 1rem; margin-bottom: 6px; }
.timeline-content p { color: var(--text-muted); font-size: 0.88rem; }

/* ===== INFO BOX ===== */
.info-box {
  background: var(--surface);
  border: 1px solid rgba(0,120,212,0.3);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  gap: 20px;
  margin-top: 48px;
}
.info-icon { font-size: 2rem; flex-shrink: 0; }
.info-content h4 { font-size: 1.1rem; margin-bottom: 16px; }
.component-list { display: flex; flex-direction: column; gap: 10px; }
.component-list li { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: var(--text-muted); }
.tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(0,120,212,0.2);
  border: 1px solid rgba(0,120,212,0.4);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  min-width: 80px;
  text-align: center;
  flex-shrink: 0;
}

/* ===== TABS ===== */
.tabs-container, .arch-tabs { width: 100%; }
.tabs-nav {
  display: flex;
  gap: 4px;
  background: var(--surface);
  padding: 6px;
  border-radius: var(--radius);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.tab-btn {
  padding: 10px 18px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}
.tab-btn:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.tab-btn.active { background: var(--primary); color: white; }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.tab-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.tab-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.tab-badge.on-prem { background: rgba(87,217,163,0.2); color: var(--success); }
.tab-badge.cloud { background: rgba(0,120,212,0.2); color: var(--accent); }
.tab-badge.hybrid { background: rgba(180,167,245,0.2); color: var(--purple); }
.tab-info h3 { font-size: 1.3rem; margin-bottom: 12px; }
.tab-info p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 20px; }
.feature-list { display: flex; flex-direction: column; gap: 8px; }
.feature-list li { font-size: 0.875rem; color: var(--text-muted); }
.note-box {
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(255,215,0,0.08);
  border: 1px solid rgba(255,215,0,0.2);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.note-box strong { color: var(--warning); }

/* ===== SERVICE DIAGRAMS ===== */
.tab-visual { display: flex; align-items: center; justify-content: center; }
.service-diagram {
  width: 100%;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}
.sd-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.sd-forest {
  border: 2px solid rgba(80,230,255,0.3);
  border-radius: 10px;
  padding: 16px;
}
.sd-label { font-size: 0.85rem; font-weight: 600; color: var(--accent); margin-bottom: 12px; }
.sd-domain {
  border: 2px solid rgba(0,120,212,0.4);
  border-radius: 8px;
  padding: 12px;
}
.sd-child-domains {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 8px;
}
.sd-domain-child {
  background: rgba(0,120,212,0.15);
  border: 1px solid rgba(0,120,212,0.3);
  border-radius: 6px;
  padding: 8px;
  font-size: 0.78rem;
  font-weight: 600;
}
.hybrid-flow {
  display: flex;
  align-items: center;
  justify-content: space-around;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}
.hybrid-box {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
}
.on-prem-box { background: rgba(87,217,163,0.15); border: 1px solid rgba(87,217,163,0.4); color: var(--success); }
.cloud-box { background: rgba(0,120,212,0.15); border: 1px solid rgba(0,120,212,0.4); color: var(--accent); }
.hybrid-arrow { color: var(--text-muted); font-size: 0.78rem; }
.hybrid-apps {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.app-box {
  padding: 6px 12px;
  background: rgba(180,167,245,0.1);
  border: 1px solid rgba(180,167,245,0.3);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--purple);
}
.pki-tree { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.pki-root {
  padding: 12px 20px;
  background: rgba(255,107,107,0.15);
  border: 1px solid rgba(255,107,107,0.4);
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--danger);
}
.pki-sub { display: flex; gap: 8px; }
.pki-subca {
  padding: 8px 12px;
  background: rgba(0,120,212,0.15);
  border: 1px solid rgba(0,120,212,0.4);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--accent);
}
.pki-certs { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.pki-cert {
  padding: 6px 10px;
  background: rgba(87,217,163,0.1);
  border: 1px solid rgba(87,217,163,0.3);
  border-radius: 6px;
  font-size: 0.72rem;
  color: var(--success);
}
.adfs-flow { display: flex; align-items: center; justify-content: space-around; margin: 12px 0; }
.adfs-user, .adfs-sts, .adfs-app {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
}
.adfs-user { background: rgba(87,217,163,0.1); border: 1px solid rgba(87,217,163,0.3); color: var(--success); }
.adfs-sts { background: rgba(0,120,212,0.15); border: 1px solid rgba(0,120,212,0.4); color: var(--accent); }
.adfs-app { background: rgba(180,167,245,0.1); border: 1px solid rgba(180,167,245,0.3); color: var(--purple); }
.adfs-arrow { color: var(--text-muted); font-size: 1rem; }
.adfs-note { font-size: 0.72rem; color: var(--text-muted); }
.adlds-cases { display: flex; flex-direction: column; gap: 8px; }
.adlds-case {
  padding: 10px 16px;
  background: rgba(255,169,77,0.1);
  border: 1px solid rgba(255,169,77,0.3);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--orange);
}
.rms-flow { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.rms-step {
  padding: 8px 20px;
  background: rgba(180,167,245,0.1);
  border: 1px solid rgba(180,167,245,0.3);
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--purple);
  width: 80%;
  text-align: center;
}
.rms-arrow { color: var(--text-muted); font-size: 1.2rem; }

/* ===== COMPARISON TABLE ===== */
.comparison-table-wrapper { overflow-x: auto; margin-bottom: 48px; }
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.comparison-table th, .comparison-table td {
  padding: 12px 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.comparison-table th {
  background: var(--surface);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.comparison-table td:first-child { text-align: left; color: var(--text-muted); }
.comparison-table tr:hover td { background: rgba(255,255,255,0.02); }
.col-essentials { color: var(--text-muted); }
.col-standard { color: var(--accent); }
.col-datacenter { color: var(--purple); }
.check { color: var(--success); }
.cross { color: var(--danger); }
.price { font-weight: 700; color: var(--warning); }

/* ===== EDITION CARDS ===== */
.edition-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.edition-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  position: relative;
}
.edition-card.recommended {
  border-color: rgba(0,120,212,0.5);
  box-shadow: 0 0 30px rgba(0,120,212,0.15);
}
.recommended-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  white-space: nowrap;
}
.edition-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.badge-essentials { background: rgba(255,255,255,0.08); color: var(--text-muted); }
.badge-standard { background: rgba(0,120,212,0.2); color: var(--accent); }
.badge-datacenter { background: rgba(180,167,245,0.2); color: var(--purple); }
.edition-card h3 { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 8px; }
.edition-card p { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 16px; }
.edition-use-cases { display: flex; flex-wrap: wrap; gap: 6px; }
.edition-use-cases span {
  padding: 4px 10px;
  background: rgba(255,255,255,0.05);
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===== FUNCTIONAL LEVELS ===== */
.fl-grid { display: flex; flex-direction: column; gap: 8px; }
.fl-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  padding: 14px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  align-items: center;
  transition: var(--transition);
}
.fl-item:hover { border-color: rgba(0,120,212,0.3); }
.fl-current { border-color: rgba(0,120,212,0.5); background: rgba(0,120,212,0.05); }
.fl-ver { font-size: 0.875rem; font-weight: 700; color: var(--accent); }
.fl-features { font-size: 0.875rem; color: var(--text-muted); }

/* ===== IMPLEMENTATION PHASES ===== */
.impl-phases { display: flex; flex-direction: column; gap: 48px; }
.phase { display: grid; grid-template-columns: 80px 1fr; gap: 32px; }
.phase-num {
  font-size: 3.5rem;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 2px rgba(0,120,212,0.4);
  line-height: 1;
  padding-top: 4px;
}
.phase-content h3 { font-size: 1.4rem; margin-bottom: 24px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.phase-steps { display: flex; flex-direction: column; gap: 20px; margin-bottom: 24px; }
.step { display: flex; gap: 20px; align-items: start; }
.step-icon { font-size: 1.5rem; flex-shrink: 0; width: 40px; text-align: center; }
.step-text h4 { font-size: 1rem; margin-bottom: 6px; }
.step-text p { font-size: 0.875rem; color: var(--text-muted); }

/* ===== CODE BLOCKS ===== */
.code-block {
  background: #0d0d1a;
  border: 1px solid rgba(0,120,212,0.2);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.copy-btn {
  padding: 4px 12px;
  background: rgba(0,120,212,0.2);
  border: 1px solid rgba(0,120,212,0.4);
  border-radius: 4px;
  color: var(--accent);
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}
.copy-btn:hover { background: var(--primary); color: white; }
.copy-btn.copied { background: var(--success); border-color: var(--success); color: white; }
pre {
  padding: 20px 24px;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  line-height: 1.8;
  color: #abb2bf;
}
pre .comment { color: #5c6370; font-style: italic; }

/* ===== ARCHITECTURE ===== */
.arch-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.arch-diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  font-size: 0.8rem;
}
.arch-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
  text-align: center;
}
.arch-forest-box {
  border: 2px solid rgba(80,230,255,0.3);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
}
.arch-forest-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
  text-align: center;
}
.arch-domain-box {
  border: 2px solid rgba(0,120,212,0.4);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 12px;
}
.arch-domain-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-light);
  margin-bottom: 12px;
  text-align: center;
}
.arch-dc-row { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 12px; }
.arch-dc {
  background: rgba(0,120,212,0.15);
  border: 1px solid rgba(0,120,212,0.4);
  border-radius: 8px;
  padding: 10px 14px;
  text-align: center;
  font-size: 0.72rem;
  font-weight: 600;
}
.primary-dc { border-color: rgba(80,230,255,0.6); background: rgba(80,230,255,0.1); }
.gc-dc { border-color: rgba(180,167,245,0.6); background: rgba(180,167,245,0.1); }
.dc-role { font-size: 0.65rem; color: var(--text-muted); margin-top: 4px; }
.arch-ou-row { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.arch-ou {
  padding: 6px 10px;
  background: rgba(87,217,163,0.1);
  border: 1px solid rgba(87,217,163,0.3);
  border-radius: 6px;
  font-size: 0.68rem;
  color: var(--success);
}
.arch-clients { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.arch-client {
  padding: 6px 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.arch-sites-row { display: flex; gap: 12px; margin-top: 12px; }
.arch-site {
  flex: 1;
  border: 1px dashed rgba(255,255,255,0.15);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
}
.arch-site-label { font-size: 0.72rem; color: var(--text-muted); margin-bottom: 8px; font-weight: 600; }
.arch-child-domains { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.arch-child {
  flex: 1;
  border: 1px dashed rgba(0,120,212,0.3);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
  min-width: 100px;
}
.arch-child-label { font-size: 0.72rem; color: var(--primary-light); margin-bottom: 8px; font-weight: 600; }
.arch-dc-mini {
  padding: 4px 8px;
  background: rgba(0,120,212,0.15);
  border-radius: 4px;
  font-size: 0.65rem;
  margin: 2px;
  display: inline-block;
}
.arch-specs h4 { font-size: 1rem; margin-bottom: 16px; }
.arch-specs ul { display: flex; flex-direction: column; gap: 10px; }
.arch-specs li { font-size: 0.875rem; color: var(--text-muted); padding-left: 12px; border-left: 2px solid rgba(0,120,212,0.3); }
.arch-specs li strong { color: var(--text); }
.arch-rec {
  margin-top: 20px;
  padding: 14px 16px;
  background: rgba(0,120,212,0.08);
  border: 1px solid rgba(0,120,212,0.2);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.arch-rec strong { color: var(--warning); }
.secondary-dc { border-color: rgba(87,217,163,0.4); background: rgba(87,217,163,0.08); }
.hybrid-arch-layout { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; justify-content: center; }
.hybrid-on-prem, .hybrid-cloud { flex: 1; min-width: 160px; }
.hybrid-section-label { font-size: 0.72rem; font-weight: 700; color: var(--text-muted); text-align: center; margin-bottom: 8px; }
.arch-connect { text-align: center; font-size: 0.75rem; color: var(--text-muted); margin-top: 8px; font-weight: 600; }
.cloud-services { display: flex; flex-direction: column; gap: 6px; }
.cloud-svc {
  padding: 8px 12px;
  background: rgba(0,120,212,0.1);
  border: 1px solid rgba(0,120,212,0.25);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--accent);
  text-align: center;
}
.arch-dc-row-mini { display: flex; gap: 4px; justify-content: center; margin-top: 8px; }

/* ===== FSMO SECTION ===== */
.fsmo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.fsmo-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.forest-scope { border-top: 3px solid var(--accent); }
.domain-scope { border-top: 3px solid var(--primary); }
.fsmo-scope {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.fsmo-role { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.fsmo-role:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.fsmo-role h4 { font-size: 0.95rem; margin-bottom: 6px; }
.fsmo-role p { font-size: 0.82rem; color: var(--text-muted); }

/* ===== CALCULATOR ===== */
.calculator-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}
.calc-inputs, .calc-results {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.calc-inputs h3, .calc-results h3 { font-size: 1.1rem; margin-bottom: 24px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.input-group { margin-bottom: 20px; }
.input-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.slider-group { display: flex; align-items: center; gap: 12px; }
input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--surface2);
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0,120,212,0.5);
}
.slider-val {
  min-width: 50px;
  text-align: right;
  font-weight: 700;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
}
.select-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.875rem;
  cursor: pointer;
  outline: none;
  font-family: 'Inter', sans-serif;
}
.select-group select:focus { border-color: var(--primary); }
.checkbox-group { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-muted);
  cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}
.cost-breakdown { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.cost-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
}
.cost-label { color: var(--text-muted); }
.cost-value { font-weight: 700; color: var(--text); font-family: 'JetBrains Mono', monospace; }
.cost-divider { height: 1px; background: var(--border); margin: 8px 0; }
.total-row .cost-label { font-size: 1rem; font-weight: 700; color: var(--text); }
.total-value { font-size: 1.4rem; color: var(--success); }
.annual-row .cost-label { color: var(--text-muted); }
.annual-value { color: var(--warning); }
.cost-chart { margin-bottom: 20px; }
.chart-label { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.chart-bars { display: flex; flex-direction: column; gap: 8px; }
.chart-bar-item { display: flex; align-items: center; gap: 10px; font-size: 0.75rem; }
.chart-bar-label { min-width: 130px; color: var(--text-muted); }
.chart-bar-track { flex: 1; height: 8px; background: var(--bg); border-radius: 4px; overflow: hidden; }
.chart-bar-fill { height: 100%; border-radius: 4px; transition: width 0.5s ease; }
.chart-bar-pct { min-width: 35px; text-align: right; color: var(--text-muted); }
.cost-notes { margin-bottom: 20px; }
.cost-notes p { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }

/* ===== LICENSING MODELS ===== */
.lm-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.lm-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.lm-card h4 { font-size: 1rem; margin-bottom: 10px; }
.lm-card p { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 16px; }
.lm-pros-cons { display: flex; flex-direction: column; gap: 6px; }
.pros { font-size: 0.8rem; color: var(--success); }
.cons { font-size: 0.8rem; color: var(--danger); }

/* ===== BEST PRACTICES ===== */
.bp-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}
.bp-category {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.bp-icon { font-size: 2rem; margin-bottom: 12px; }
.bp-category h3 { font-size: 1.1rem; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.bp-list { display: flex; flex-direction: column; gap: 8px; }
.bp-list li { font-size: 0.875rem; color: var(--text-muted); line-height: 1.5; }

/* ===== CHECKLIST ===== */
.checklist-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.checklist-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.875rem;
  color: var(--text-muted);
}
.checklist-item:hover { border-color: rgba(0,120,212,0.4); }
.checklist-item.checked { background: rgba(87,217,163,0.05); border-color: rgba(87,217,163,0.3); color: var(--text); }
.cl-check { font-size: 1.1rem; flex-shrink: 0; }

/* ===== FAQ ===== */
.faq-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 60px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
}
.faq-question:hover { background: rgba(255,255,255,0.02); }
.faq-icon {
  font-size: 1.3rem;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
  line-height: 1;
  width: 24px;
  text-align: center;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq-answer.open {
  max-height: 500px;
  padding: 0 24px 20px;
}
.faq-answer p { color: var(--text-muted); font-size: 0.875rem; line-height: 1.7; }
.faq-answer strong { color: var(--text); }
.faq-answer code { font-size: 0.82rem; }
.port-table-wrapper { overflow-x: auto; }
.port-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.port-table th, .port-table td { padding: 8px 16px; border: 1px solid var(--border); text-align: left; }
.port-table th { background: var(--surface2); font-weight: 700; }
.port-table td { color: var(--text-muted); }
.port-table td:first-child { font-family: 'JetBrains Mono', monospace; color: var(--accent); }

/* ===== RESOURCES ===== */
.resources-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.resource-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
}
.resource-card:hover { border-color: rgba(0,120,212,0.4); transform: translateY(-3px); color: var(--text); }
.resource-icon { font-size: 1.8rem; margin-bottom: 12px; }
.resource-card h4 { font-size: 0.95rem; margin-bottom: 8px; }
.resource-card p { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 12px; }
.resource-tag { font-size: 0.72rem; color: var(--accent); font-family: 'JetBrains Mono', monospace; }

/* ===== FOOTER ===== */
.footer {
  background: var(--secondary);
  border-top: 1px solid var(--border);
  padding: 60px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .nav-brand { margin-bottom: 16px; }
.footer-brand p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.6; }
.footer h4 { font-size: 0.9rem; margin-bottom: 16px; color: var(--text); }
.footer-links ul, .footer-topics ul { display: flex; flex-direction: column; gap: 8px; }
.footer-links li a, .footer-topics li {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-links li a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-bottom p { font-size: 0.78rem; color: var(--text-muted); }
.footer-contributor {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-contributor strong { color: var(--text); }
.footer-sep { color: rgba(255,255,255,0.15); }
.footer-social {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}
.footer-social:hover { color: var(--primary-light); text-decoration: underline; }

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.4rem;
  cursor: pointer;
  opacity: 0;
  transition: var(--transition);
  z-index: 50;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
}
.back-to-top.visible { opacity: 1; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .tab-inner { grid-template-columns: 1fr; }
  .arch-layout { grid-template-columns: 1fr; }
  .fsmo-grid { grid-template-columns: 1fr; }
  .edition-cards { grid-template-columns: 1fr; }
  .calculator-wrapper { grid-template-columns: 1fr; }
  .lm-grid { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg2); border-bottom: 1px solid var(--border); padding: 16px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .navbar { position: fixed; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .tabs-nav { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .tab-btn { white-space: nowrap; }
  .timeline-item { grid-template-columns: 60px 1fr; gap: 12px; }
  .phase { grid-template-columns: 1fr; }
  .phase-num { display: none; }
  .fl-item { grid-template-columns: 1fr; gap: 4px; }
  .bp-categories { grid-template-columns: 1fr; }
  .checklist-grid { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .info-box { flex-direction: column; }
  .comparison-table { font-size: 0.75rem; }
  .comparison-table th, .comparison-table td { padding: 8px 10px; }
  .arch-child-domains { flex-direction: column; }
}
@media (max-width: 480px) {
  .section { padding: 60px 0; }
  .cards-grid { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; justify-content: center; }
}