/* ─────────────────────────────────────────────────────────────
   Callstrike Case Study / Social Proof Page
   Deep navy/slate + gold/amber enterprise credibility aesthetic.
   Mobile-first. Reuses Syne + General Sans font stack.
───────────────────────────────────────────────────────────── */

:root {
  --bg: #090910;
  --bg-elevated: #0e0e1a;
  --bg-card: #13131f;
  --fg: #eaeaf5;
  --fg-muted: #8888a8;
  --fg-dim: #555568;
  /* Gold/amber = credibility + warmth */
  --accent: #f0a500;
  --accent-dim: rgba(240, 165, 0, 0.15);
  --accent-glow: rgba(240, 165, 0, 0.06);
  /* Deep blue = trust + enterprise */
  --accent2: #4a7fff;
  --accent2-dim: rgba(74, 127, 255, 0.12);
  --accent2-glow: rgba(74, 127, 255, 0.06);
  --green: #00e676;
  --red: #ff4757;
  --border: rgba(255, 255, 255, 0.07);
  --border-accent: rgba(240, 165, 0, 0.25);
  --radius: 14px;
  --radius-sm: 8px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'General Sans', sans-serif;
}

/* ─── RESET ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── NAV ─── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 0;
  background: rgba(9, 9, 16, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-left { display: flex; align-items: center; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-icon { font-size: 22px; }
.logo-text {
  font-family: var(--font-display); font-weight: 700; font-size: 20px;
  letter-spacing: -0.5px; color: var(--fg);
}

.nav-dropdown { position: relative; }
.nav-dropdown-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-display); font-size: 14px; font-weight: 500;
  color: var(--fg-muted); text-decoration: none;
  padding: 8px 12px; border-radius: var(--radius-sm);
  background: none; border: none; cursor: pointer; transition: all 0.2s;
}
.nav-dropdown-btn:hover { color: var(--fg); background: var(--bg-elevated); }
.nav-dropdown-btn svg { width: 12px; height: 12px; opacity: 0.6; }
.nav-dropdown-menu {
  display: none; position: absolute; top: calc(100% + 8px); left: 0;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 8px; min-width: 200px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5); z-index: 200;
}
.nav-dropdown-menu.open { display: block; }
.nav-dropdown-item {
  display: block; padding: 10px 14px;
  font-family: var(--font-display); font-size: 13px; font-weight: 500;
  color: var(--fg-muted); text-decoration: none;
  border-radius: var(--radius-sm); transition: all 0.15s;
}
.nav-dropdown-item:hover { background: var(--bg-elevated); color: var(--fg); }

.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-link {
  font-family: var(--font-display); font-size: 14px; font-weight: 500;
  color: var(--fg-muted); text-decoration: none;
  padding: 8px 12px; border-radius: var(--radius-sm); transition: all 0.2s;
}
.nav-link:hover { color: var(--fg); background: var(--bg-elevated); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px;
  background: var(--accent); color: #000;
  border-radius: var(--radius-sm);
  font-family: var(--font-display); font-size: 13px; font-weight: 700;
  text-decoration: none; transition: all 0.2s;
}
.nav-cta:hover { background: #ffc107; box-shadow: 0 4px 20px rgba(240,165,0,0.3); }

/* ─── HERO ─── */
.cs-hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 120px 32px 80px; overflow: hidden; text-align: center;
}
.cs-hero-content { max-width: 920px; position: relative; z-index: 2; }

.cs-hero-badge {
  display: inline-block; padding: 8px 20px;
  border-radius: 100px;
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-display); font-size: 12px; font-weight: 600;
  letter-spacing: 1.5px; text-transform: uppercase;
  margin-bottom: 28px;
  border: 1px solid var(--border-accent);
}

.cs-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -2px;
  margin-bottom: 24px;
  color: var(--fg);
}

.cs-hero-sub {
  font-size: 18px; line-height: 1.75;
  color: var(--fg-muted);
  max-width: 640px; margin: 0 auto 48px;
}

.cs-hero-cta-group {
  display: flex; gap: 16px; justify-content: center; align-items: center;
  flex-wrap: wrap;
}
.cs-hero-cta-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 18px 44px;
  background: var(--accent); color: #000;
  border-radius: var(--radius);
  font-family: var(--font-display); font-size: 16px; font-weight: 700;
  text-decoration: none; transition: all 0.25s ease;
}
.cs-hero-cta-primary:hover {
  background: #ffc107;
  box-shadow: 0 0 50px rgba(240,165,0,0.35);
  transform: translateY(-2px);
}
.cs-hero-cta-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 18px 36px;
  background: transparent; color: var(--fg-muted);
  border-radius: var(--radius);
  font-family: var(--font-display); font-size: 15px; font-weight: 600;
  text-decoration: none; border: 1px solid var(--border);
  transition: all 0.25s ease;
}
.cs-hero-cta-secondary:hover { border-color: var(--accent2); color: var(--fg); }

.cs-hero-glow {
  position: absolute; top: 5%; left: 50%; transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 65%);
  pointer-events: none; z-index: 1;
}
.cs-hero-glow2 {
  position: absolute; bottom: 10%; right: 5%; top: 50%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--accent2-glow) 0%, transparent 65%);
  pointer-events: none; z-index: 1;
}

/* ─── SECTION UTILS ─── */
.cs-section { padding: 100px 0; }
.cs-section-inner { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.cs-section-tag {
  display: inline-block;
  font-family: var(--font-display); font-size: 12px; font-weight: 600;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
}
.cs-section h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 700; line-height: 1.12; letter-spacing: -1.5px;
  margin-bottom: 20px;
}
.cs-section p { font-size: 17px; color: var(--fg-muted); line-height: 1.7; max-width: 640px; }
.cs-label {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 12px; color: var(--fg-muted);
  font-family: var(--font-display); font-weight: 500;
  margin-bottom: 24px;
}
.cs-label-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}

/* ─── CASE STUDY CARDS ─── */
.cs-case-studies { padding: 80px 0; background: var(--bg-elevated); }
.cs-case-studies-header { text-align: center; margin-bottom: 72px; }
.cs-case-studies-header p { max-width: 520px; margin: 0 auto; }

.cs-case-study-card {
  max-width: 900px; margin: 0 auto 56px;
  padding: 48px 52px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  position: relative;
  transition: border-color 0.3s;
}
.cs-case-study-card:last-child { margin-bottom: 0; }
.cs-case-study-card:hover { border-color: var(--border-accent); }

.cs-card-vertical-tag {
  position: absolute; top: 28px; right: 32px;
  display: inline-block; padding: 4px 12px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  font-family: var(--font-display); font-size: 11px; font-weight: 600;
  color: var(--accent); letter-spacing: 1px; text-transform: uppercase;
}

.cs-card-title {
  font-family: var(--font-display); font-size: 26px; font-weight: 700;
  color: var(--fg); margin-bottom: 8px; line-height: 1.2;
}
.cs-card-subtitle {
  font-size: 15px; color: var(--fg-muted); margin-bottom: 32px; line-height: 1.5;
}

.cs-card-body { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 32px; margin-bottom: 36px; }
.cs-card-col h4 {
  font-family: var(--font-display); font-size: 13px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--accent); margin-bottom: 12px;
}
.cs-card-col p { font-size: 14px; color: var(--fg-muted); line-height: 1.65; max-width: 100%; }

.cs-results-row { display: flex; gap: 16px; flex-wrap: wrap; }
.cs-metric-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  font-family: var(--font-display); font-size: 13px; font-weight: 600;
  color: var(--accent);
}
.cs-metric-chip .cs-chip-num {
  font-size: 18px; font-weight: 800; color: var(--fg);
}

/* ─── RESULTS SUMMARY BAR ─── */
.cs-results-bar {
  padding: 64px 32px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  max-width: 900px; margin: 0 auto;
}
.cs-results-bar-inner {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
}
.cs-result-stat { text-align: center; padding: 0 32px; }
.cs-result-stat + .cs-result-stat {
  border-left: 1px solid var(--border);
}
.cs-result-stat-num {
  font-family: var(--font-display); font-size: 52px; font-weight: 800;
  color: var(--accent); line-height: 1;
  margin-bottom: 8px;
}
.cs-result-stat-label {
  font-size: 14px; color: var(--fg-muted); line-height: 1.4;
}

/* ─── FINAL CTA ─── */
.cs-cta-section {
  padding: 120px 0;
  background: var(--bg);
  text-align: center;
}
.cs-cta-section h2 {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 50px);
  font-weight: 800; line-height: 1.1; letter-spacing: -2px;
  margin-bottom: 20px;
}
.cs-cta-section p { font-size: 18px; color: var(--fg-muted); margin-bottom: 48px; max-width: 540px; margin-left: auto; margin-right: auto; }
.cs-cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.cs-cta-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 18px 48px;
  background: var(--accent); color: #000;
  border-radius: var(--radius);
  font-family: var(--font-display); font-size: 16px; font-weight: 700;
  text-decoration: none; transition: all 0.25s ease;
}
.cs-cta-primary:hover { background: #ffc107; box-shadow: 0 0 50px rgba(240,165,0,0.35); transform: translateY(-2px); }
.cs-cta-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 18px 36px;
  background: transparent; color: var(--fg-muted);
  border-radius: var(--radius);
  font-family: var(--font-display); font-size: 15px; font-weight: 600;
  text-decoration: none; border: 1px solid var(--border);
  transition: all 0.25s ease;
}
.cs-cta-secondary:hover { border-color: var(--fg-muted); color: var(--fg); }
.cs-cta-trust { font-size: 14px; color: var(--fg-dim); }

/* ─── FOOTER ─── */
.cs-footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.cs-footer-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
}
.cs-footer-logo { font-family: var(--font-display); font-size: 16px; font-weight: 700; color: var(--fg-muted); }
.cs-footer-links { display: flex; gap: 24px; }
.cs-footer-links a { font-size: 13px; color: var(--fg-dim); text-decoration: none; transition: color 0.2s; }
.cs-footer-links a:hover { color: var(--fg-muted); }
.cs-footer-copy { font-size: 13px; color: var(--fg-dim); }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .cs-card-body { grid-template-columns: 1fr; gap: 20px; }
  .cs-results-bar-inner { grid-template-columns: 1fr; gap: 32px; }
  .cs-result-stat + .cs-result-stat { border-left: none; border-top: 1px solid var(--border); padding-top: 32px; }
  .cs-case-study-card { padding: 36px 28px; }
}
@media (max-width: 600px) {
  .cs-hero { padding: 100px 20px 60px; }
  .cs-hero h1 { letter-spacing: -1px; }
  .cs-hero-cta-group { flex-direction: column; align-items: center; }
  .cs-hero-cta-primary, .cs-hero-cta-secondary { width: 100%; justify-content: center; }
  .nav-inner { padding: 0 20px; }
  .cs-section-inner { padding: 0 20px; }
  .nav-left .nav-link, .nav-right .nav-link { display: none; }
  .cs-cta-buttons { flex-direction: column; align-items: center; }
  .cs-cta-primary, .cs-cta-secondary { width: 100%; justify-content: center; }
  .cs-results-bar { padding: 40px 24px; }
  .cs-result-stat-num { font-size: 40px; }
  .cs-card-vertical-tag { position: static; display: inline-block; margin-bottom: 16px; }
}