/* =============================================
   VPN Bot — Main Stylesheet
   Mobile-first, responsive design
   Primary #0891B2
   ============================================= */

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

:root {
  --primary: #0891B2;
  --accent: #06B6D4;
  --accent-dark: #0E7490;
  --accent-light: #ECFEFF;
  --text: #2D3640;
  --text-muted: #616C79;
  --bg: #ffffff;
  --bg-light: #F0FEFF;
  --bg-dark: #2D3640;
  --border: #CFFAFE;
  --shadow: 0 4px 24px rgba(8,145,178,0.14);
  --shadow-card: 0 2px 16px rgba(8,145,178,0.08);
  --radius: 8px;
  --radius-sm: 6px;
  --radius-btn: 8px;
  --font: 'Poppins', 'Inter', system-ui, -apple-system, Arial, sans-serif;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); font-size: 16px; line-height: 1.6; color: var(--text); background: var(--bg); overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

h1 { font-size: clamp(1.75rem, 5vw, 2.75rem); font-weight: 800; line-height: 1.2; }
h2 { font-size: clamp(1.4rem, 3.5vw, 2rem); font-weight: 700; line-height: 1.3; }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.35rem); font-weight: 600; line-height: 1.4; }
h4 { font-size: 1rem; font-weight: 600; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.97); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); box-shadow: 0 2px 12px rgba(8,145,178,0.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo img { height: 36px; width: auto; }
.nav-menu { display: none; align-items: center; gap: 8px; }
.nav-menu a { color: var(--text); font-size: 0.9rem; font-weight: 500; padding: 6px 14px; border-radius: var(--radius-sm); transition: background 0.2s, color 0.2s; }
.nav-menu a:hover { background: var(--bg-light); color: var(--accent); }
.header-cta { flex-shrink: 0; }

.btn-primary { display: inline-flex; align-items: center; gap: 6px; background: var(--primary); color: #fff; font-family: var(--font); font-size: 0.9rem; font-weight: 600; padding: 10px 22px; border-radius: var(--radius-btn); border: none; cursor: pointer; transition: background 0.2s, transform 0.15s, box-shadow 0.2s; white-space: nowrap; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(8,145,178,0.35); }
.btn-accent { background: var(--accent); color: #fff; display: inline-flex; align-items: center; gap: 8px; font-family: var(--font); font-size: 1rem; font-weight: 700; padding: 14px 32px; border-radius: var(--radius-btn); border: none; cursor: pointer; transition: background 0.2s, transform 0.15s, box-shadow 0.2s; white-space: nowrap; }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(8,145,178,0.4); }
.btn-outline { display: inline-flex; align-items: center; gap: 8px; background: transparent; color: var(--primary); font-family: var(--font); font-size: 0.95rem; font-weight: 600; padding: 13px 28px; border-radius: var(--radius-btn); border: 2px solid var(--primary); cursor: pointer; transition: all 0.2s; white-space: nowrap; }
.btn-outline:hover { background: rgba(8,145,178,0.08); border-color: var(--accent-dark); color: var(--accent-dark); }
.cta-banner .btn-outline { color: #fff; border-color: rgba(255,255,255,0.6); }
.cta-banner .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; }

.burger { display: flex; flex-direction: column; justify-content: space-between; width: 26px; height: 18px; background: none; border: none; cursor: pointer; padding: 0; flex-shrink: 0; }
.burger span { display: block; width: 100%; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.25s; }
.burger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.mobile-nav { display: none; flex-direction: column; gap: 4px; background: #fff; border-top: 1px solid var(--border); padding: 16px 20px 20px; }
.mobile-nav.open { display: flex; }
.mobile-nav a { font-size: 1rem; font-weight: 500; color: var(--text); padding: 10px 14px; border-radius: var(--radius-sm); transition: background 0.2s; }
.mobile-nav a:hover { background: var(--bg-light); color: var(--accent); }
.mobile-nav .btn-accent { margin-top: 8px; justify-content: center; font-size: 0.95rem; padding: 12px 24px; }

.hero { background: linear-gradient(180deg, #FFFFFF 0%, rgba(8,145,178,0.12) 100%); color: var(--text); padding: 64px 0 72px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -40%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(8,145,178,0.10) 0%, transparent 70%); pointer-events: none; }
.hero::after { content: ''; position: absolute; bottom: -20%; left: -5%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(8,145,178,0.07) 0%, transparent 70%); pointer-events: none; }
.hero-inner { position: relative; z-index: 1; max-width: 720px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(8,145,178,0.10); border: 1px solid rgba(8,145,178,0.28); color: var(--primary); font-size: 0.82rem; font-weight: 600; padding: 5px 14px; border-radius: 50px; margin-bottom: 20px; letter-spacing: 0.5px; text-transform: uppercase; }
.hero h1 { margin-bottom: 20px; color: var(--text); }
.hero h1 span { color: var(--primary); }
.hero-desc { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 36px; max-width: 560px; line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 48px; padding-top: 36px; border-top: 1px solid rgba(8,145,178,0.18); }
.trust-item { display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: 0.88rem; }
.trust-item svg { color: var(--primary); flex-shrink: 0; }

.stats-bar { background: var(--primary); padding: 0; }
.stats-inner { display: grid; grid-template-columns: repeat(2, 1fr); }
.stat-item { text-align: center; padding: 20px 16px; position: relative; }
.stat-item:not(:last-child)::after { content: ''; position: absolute; right: 0; top: 20%; height: 60%; width: 1px; background: rgba(255,255,255,0.25); }
.stat-number { display: block; font-size: 1.6rem; font-weight: 800; color: #fff; line-height: 1; }
.stat-label { display: block; font-size: 0.78rem; color: rgba(255,255,255,0.8); margin-top: 4px; font-weight: 500; }

.section { padding: 72px 0; }
.section-alt { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { color: var(--primary); margin-bottom: 12px; }
.section-header p { color: var(--text-muted); font-size: 1rem; max-width: 500px; margin: 0 auto; }

.platforms-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.platform-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 20px; text-align: center; transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s; cursor: pointer; }
.platform-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-3px); }
.platform-card a { display: flex; flex-direction: column; align-items: center; gap: 12px; color: var(--text); }
.platform-icon { width: 52px; height: 52px; background: var(--bg-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: background 0.2s; }
.platform-card:hover .platform-icon { background: var(--accent-light); }
.platform-icon svg { width: 26px; height: 26px; fill: var(--primary); transition: fill 0.2s; }
.platform-card:hover .platform-icon svg { fill: var(--accent-dark); }
.platform-name { font-weight: 700; font-size: 0.95rem; color: var(--primary); }
.platform-action { font-size: 0.78rem; color: var(--accent); font-weight: 600; letter-spacing: 0.3px; }

.features-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
.feature-card { background: #fff; border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow-card); display: flex; gap: 20px; align-items: flex-start; transition: transform 0.2s, box-shadow 0.2s; }
.feature-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.feature-icon { width: 52px; height: 52px; background: var(--accent-light); border-radius: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.feature-icon svg { width: 24px; height: 24px; color: var(--accent-dark); }
.feature-content h3 { color: var(--primary); margin-bottom: 6px; }
.feature-content p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }

.cta-banner { background: linear-gradient(135deg, var(--primary) 0%, var(--accent-dark) 100%); padding: 64px 0; text-align: center; color: #fff; position: relative; overflow: hidden; }
.cta-banner::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 70% 50%, rgba(255,255,255,0.1) 0%, transparent 60%); pointer-events: none; }
.cta-banner h2 { color: #fff; margin-bottom: 12px; position: relative; }
.cta-banner p { color: rgba(255,255,255,0.75); margin-bottom: 32px; font-size: 1rem; position: relative; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; position: relative; }

.site-footer { background: #ffffff; color: var(--text-muted); border-top: 1px solid var(--border); padding: 48px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 32px; margin-bottom: 36px; }
.footer-brand .logo img { height: 36px; margin-bottom: 14px; display: block; }
.footer-brand p { font-size: 0.88rem; line-height: 1.6; max-width: 280px; color: var(--text-muted); }
.footer-col h4 { color: var(--text); font-size: 0.9rem; font-weight: 700; margin-bottom: 14px; letter-spacing: 0.5px; text-transform: uppercase; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 0.88rem; color: var(--primary); transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--accent-dark); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; display: flex; flex-direction: column; gap: 10px; align-items: center; text-align: center; font-size: 0.82rem; color: var(--text-muted); }
.footer-bottom a { color: var(--primary); transition: color 0.2s; }
.footer-bottom a:hover { color: var(--accent-dark); }

.trust-card { background: #fff; border-left: 4px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 18px 20px; box-shadow: var(--shadow-card); }
.trust-card h3 { color: var(--primary); font-size: 1rem; margin-bottom: 6px; }
.trust-card p { color: var(--text-muted); font-size: 0.88rem; line-height: 1.6; }

@media (min-width: 640px) {
  .stats-inner { grid-template-columns: repeat(4, 1fr); }
  .stat-item:not(:last-child)::after { display: block; }
  .platforms-grid { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}
@media (min-width: 1024px) {
  .nav-menu { display: flex; }
  .burger { display: none; }
  .hero { padding: 96px 0 104px; }
  .hero-inner { max-width: 640px; }
  .features-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; }
}

.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }