/* ============================================================
   CallKeepAI — Global Stylesheet
   ============================================================ */

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

:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface2: #222222;
  --border: #2a2a2a;
  --accent: #ff7a00;
  --accent-dark: #cc6200;
  --accent-glow: rgba(255,122,0,0.15);
  --text: #ffffff;
  --text-muted: #aaaaaa;
  --text-dim: #666666;
  --nav-height: 70px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== UTILITY ===== */
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.text-orange { color: var(--accent); }
.text-muted { color: var(--text-muted); }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ===== NAVIGATION ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15,15,15,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
}
.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo img { height: 36px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--surface); }
.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}
.btn-nav {
  background: var(--accent);
  color: #fff !important;
  padding: 9px 20px !important;
  border-radius: 8px !important;
  font-weight: 600 !important;
  font-size: 14px !important;
  transition: background 0.2s, transform 0.15s !important;
}
.btn-nav:hover { background: var(--accent-dark) !important; transform: translateY(-1px) !important; }

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,122,0,0.3); }
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface); border-color: var(--accent); color: var(--accent); }
.btn-ghost {
  background: rgba(255,122,0,0.1);
  color: var(--accent);
  border: 1px solid rgba(255,122,0,0.3);
}
.btn-ghost:hover { background: rgba(255,122,0,0.2); }
.btn-lg { padding: 16px 36px; font-size: 17px; }
.btn-sm { padding: 9px 18px; font-size: 13px; }

/* ===== HERO ===== */
.hero {
  padding: 96px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -100px; left: 50%;
  transform: translateX(-50%);
  width: 700px; height: 400px;
  background: radial-gradient(ellipse, rgba(255,122,0,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,122,0,0.1);
  border: 1px solid rgba(255,122,0,0.3);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 860px;
  margin: 0 auto 24px;
}
.hero h1 span { color: var(--accent); }
.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-cta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 40px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== SECTIONS ===== */
section { padding: 80px 0; }
.section-tag {
  display: inline-block;
  background: rgba(255,122,0,0.1);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.7;
}
.section-header-center { text-align: center; }
.section-header-center .section-sub { margin: 0 auto; }

/* ===== CARDS ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  border-color: rgba(255,122,0,0.4);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.3);
}
.card-icon {
  font-size: 32px;
  margin-bottom: 16px;
}
.card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== GRID ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ===== DIVIDER ===== */
.divider {
  height: 1px;
  background: var(--border);
  border: none;
  margin: 0;
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 10px;
  background: var(--surface);
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--accent); }
.faq-chevron {
  width: 20px; height: 20px;
  border: 2px solid currentColor;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 12px;
  transition: transform 0.3s;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.75;
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-item.open .faq-chevron { transform: rotate(45deg); }
.faq-item.open .faq-question { color: var(--accent); }

/* ===== CTA SECTION ===== */
.cta-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 64px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 0 0 80px;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -60px; left: 50%;
  transform: translateX(-50%);
  width: 500px; height: 300px;
  background: radial-gradient(ellipse, rgba(255,122,0,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.cta-section h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto 36px;
}

/* ===== PAIN POINTS ===== */
.pain-box {
  background: rgba(255,122,0,0.05);
  border: 1px solid rgba(255,122,0,0.2);
  border-radius: 14px;
  padding: 28px;
}
.pain-box h3 { font-size: 17px; font-weight: 700; color: var(--accent); margin-bottom: 16px; }
.pain-list { list-style: none; }
.pain-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,122,0,0.1);
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.5;
}
.pain-list li:last-child { border-bottom: none; }
.pain-list li::before { content: "✕"; color: #ff4444; font-size: 14px; flex-shrink: 0; margin-top: 1px; }

.benefit-list { list-style: none; }
.benefit-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.5;
}
.benefit-list li::before { content: "✓"; color: var(--accent); font-weight: 700; flex-shrink: 0; margin-top: 1px; }

/* ===== PRICING ===== */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: start; }
.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  position: relative;
}
.pricing-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 20px 48px rgba(255,122,0,0.15);
}
.price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 16px;
  border-radius: 100px;
  white-space: nowrap;
}
.pricing-name { font-size: 14px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 12px; }
.pricing-price { font-size: 52px; font-weight: 800; letter-spacing: -0.03em; line-height: 1; margin-bottom: 6px; }
.pricing-price sub { font-size: 18px; vertical-align: bottom; margin-bottom: 4px; display: inline-block; font-weight: 600; color: var(--text-muted); }
.pricing-period { font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }
.pricing-features { list-style: none; margin-bottom: 32px; }
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-features li::before { content: "✓"; color: var(--accent); font-weight: 700; }

/* ===== FOOTER ===== */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand img { height: 32px; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.7; max-width: 260px; }
.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-dim);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb a { color: var(--text-muted); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text-dim); }

/* ===== FEATURE LIST ===== */
.feature-row {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  transition: border-color 0.2s;
}
.feature-row:hover { border-color: rgba(255,122,0,0.3); }
.feature-row-icon {
  font-size: 28px;
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  background: var(--accent-glow);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-row h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.feature-row p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ===== INDUSTRY HUB CARDS ===== */
.industry-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  text-decoration: none;
  display: block;
  transition: all 0.2s;
  position: relative;
}
.industry-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4);
}
.industry-card-icon { font-size: 36px; margin-bottom: 14px; }
.industry-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.industry-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.industry-card-arrow {
  position: absolute;
  top: 24px;
  right: 24px;
  color: var(--accent);
  font-size: 18px;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
}
.industry-card:hover .industry-card-arrow { opacity: 1; transform: translateX(4px); }

/* ===== WORKFLOW STEPS ===== */
.steps-list { display: flex; flex-direction: column; gap: 20px; max-width: 700px; }
.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.step-content h4 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.step-content p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ===== BANNER ===== */
.stat-banner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px;
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  text-align: center;
}
.stat-banner-item .num {
  font-size: 44px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat-banner-item .label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ===== ROI TABLE ===== */
.roi-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.roi-table th {
  background: var(--surface2);
  padding: 14px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.roi-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.5;
}
.roi-table tr:last-child td { border-bottom: none; }
.roi-table tr:hover td { background: rgba(255,122,0,0.03); }
.roi-table .good { color: var(--accent); font-weight: 600; }
.roi-table .bad { color: #ff4444; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    gap: 4px;
  }
  .nav-links.open .nav-cta { display: flex; margin-top: 12px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 56px; }
  .hero-stats { gap: 32px; }
  .section-title { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; }
  .stat-banner { flex-direction: column; }
  .cta-section { padding: 48px 24px; }
  section { padding: 60px 0; }
}