/* SafeSurf VPN — Design System
   Aesthetic: Dark, cyberpunk-minimal with teal/emerald accents.
   Font: Outfit (display) + JetBrains Mono (code/badges) */

:root {
    --bg-primary: #0a0f1c;
    --bg-secondary: #111827;
    --bg-card: #1a2235;
    --bg-card-hover: #1f2a40;
    --bg-input: #0f1629;
    --text-primary: #e8eaf0;
    --text-secondary: #8b95a8;
    --text-muted: #5a6478;
    --accent: #10b981;
    --accent-hover: #34d399;
    --accent-glow: rgba(16, 185, 129, 0.15);
    --accent-gradient: linear-gradient(135deg, #10b981, #06b6d4);
    --danger: #ef4444;
    --danger-hover: #f87171;
    --border: #1e293b;
    --border-active: #334155;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-glow: 0 0 40px rgba(16, 185, 129, 0.08);
    --transition: 0.2s ease;
    --container: 1100px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Outfit', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; }

/* Container */
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 24px; border-radius: var(--radius-sm);
    font-family: 'Outfit', sans-serif; font-weight: 500; font-size: 15px;
    border: none; cursor: pointer; transition: all var(--transition);
    text-decoration: none; gap: 8px; white-space: nowrap;
}
.btn-primary {
    background: var(--accent-gradient); color: #fff;
    box-shadow: 0 2px 12px rgba(16, 185, 129, 0.25);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(16, 185, 129, 0.35); color: #fff; }
.btn-outline {
    background: transparent; color: var(--text-primary);
    border: 1px solid var(--border-active);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 6px 16px; font-size: 13px; }
.btn-lg { padding: 14px 32px; font-size: 17px; }
.btn-full { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ==================== Header ==================== */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(10, 15, 28, 0.85); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.site-header .container {
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.logo {
    display: flex; align-items: center; gap: 8px;
    font-weight: 600; font-size: 18px; color: var(--text-primary);
}
.logo:hover { color: var(--text-primary); }
.logo-icon { color: var(--accent); font-size: 20px; }
.logo-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px; font-weight: 500;
    background: var(--accent-gradient); color: #fff;
    padding: 2px 6px; border-radius: 4px;
}
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--text-secondary); font-size: 14px; font-weight: 400; }
.nav-links a:hover { color: var(--text-primary); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-switch {
    font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
    color: var(--text-muted); border: 1px solid var(--border); border-radius: 4px;
    padding: 3px 8px; transition: all var(--transition);
}
.lang-switch:hover { color: var(--accent); border-color: var(--accent); }
.hamburger {
    display: none; background: none; border: none; cursor: pointer;
    flex-direction: column; gap: 5px; padding: 4px;
}
.hamburger span {
    display: block; width: 22px; height: 2px;
    background: var(--text-primary); transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.mobile-menu {
    display: none; position: fixed; top: 64px; left: 0; right: 0;
    background: var(--bg-secondary); border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 20px;
    z-index: 99; transform: translateY(-100%); transition: transform 0.3s ease;
}
.mobile-menu.open { transform: translateY(0); display: flex; }
.mobile-menu a { padding: 12px 0; color: var(--text-secondary); font-size: 16px; border-bottom: 1px solid var(--border); }
.mobile-menu-actions { display: flex; gap: 10px; margin-top: 16px; }

@media (max-width: 768px) {
    .nav-links, .header-actions .btn { display: none; }
    .hamburger { display: flex; }
    .mobile-menu { display: flex; transform: translateY(-100%); }
    .mobile-menu.open { transform: translateY(0); }
}

/* ==================== Hero ==================== */
.hero {
    position: relative; padding: 140px 0 80px; overflow: hidden;
    min-height: 70vh; display: flex; align-items: center;
}
.hero-bg {
    position: absolute; inset: 0; z-index: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
}
.hero-content { position: relative; z-index: 1; max-width: 640px; }
.hero-title { font-size: clamp(32px, 5vw, 52px); font-weight: 700; line-height: 1.15; margin-bottom: 20px; }
.text-gradient {
    background: var(--accent-gradient); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-subtitle { font-size: 18px; color: var(--text-secondary); margin-bottom: 32px; max-width: 520px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.hero-note { font-size: 13px; color: var(--text-muted); }

/* ==================== Sections ==================== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-secondary); }
.section-title {
    font-size: clamp(24px, 3vw, 36px); font-weight: 600;
    margin-bottom: 48px; text-align: center;
}

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.feature-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px;
    transition: all var(--transition);
}
.feature-card:hover { border-color: var(--border-active); transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.feature-icon { font-size: 32px; margin-bottom: 12px; }
.feature-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.5; }

/* Devices */
.devices-grid {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 16px;
}
.device-item {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 12px 20px;
    font-size: 14px; transition: all var(--transition);
}
.device-item:hover { border-color: var(--accent); }
.device-item span { font-size: 20px; }

/* Locations */
.locations-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px;
}
.location-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 14px; background: var(--bg-card);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    font-size: 14px;
}
.location-flag { font-size: 20px; text-transform: uppercase; font-family: 'JetBrains Mono', monospace; font-weight: 500; color: var(--accent); }
.location-count { color: var(--text-muted); font-size: 12px; margin-left: auto; }

/* ==================== Pricing ==================== */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; margin-bottom: 40px; }
.pricing-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px; text-align: center;
    position: relative; transition: all var(--transition);
}
.pricing-card:hover { border-color: var(--border-active); transform: translateY(-4px); box-shadow: var(--shadow); }
.pricing-card-featured {
    border-color: var(--accent); box-shadow: var(--shadow-glow);
    transform: scale(1.02);
}
.pricing-card-featured:hover { transform: scale(1.04) translateY(-4px); }
.pricing-badge {
    position: absolute; top: -12px; right: 16px;
    background: var(--accent-gradient); color: #fff;
    font-size: 11px; font-weight: 600; font-family: 'JetBrains Mono', monospace;
    padding: 4px 10px; border-radius: 6px;
}
.pricing-name { font-size: 18px; font-weight: 600; margin-bottom: 4px; }
.pricing-period { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }
.pricing-price { margin-bottom: 20px; }
.pricing-old-price {
    font-size: 14px; color: var(--text-muted); text-decoration: line-through; margin-right: 8px;
}
.pricing-amount { font-size: 32px; font-weight: 700; }
.pricing-features { list-style: none; margin-bottom: 24px; }
.pricing-features li {
    font-size: 13px; color: var(--text-secondary); padding: 6px 0;
    border-bottom: 1px solid var(--border);
}
.pricing-features li:last-child { border: none; }
.pricing-btn { width: 100%; }

/* Promo */
.promo-section { max-width: 440px; margin: 0 auto; }
.promo-input-group { display: flex; gap: 8px; }
.promo-input-group input {
    flex: 1; padding: 10px 14px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-family: 'Outfit', sans-serif; font-size: 14px;
}
.promo-input-group input:focus { outline: none; border-color: var(--accent); }
.promo-message { margin-top: 8px; font-size: 13px; text-align: center; }
.promo-message.success { color: var(--accent); }
.promo-message.error { color: var(--danger); }

/* ==================== FAQ ==================== */
.faq-list { max-width: 700px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-question {
    width: 100%; background: none; border: none; color: var(--text-primary);
    font-family: 'Outfit', sans-serif; font-size: 16px; font-weight: 500;
    padding: 18px 0; text-align: left; cursor: pointer; display: flex;
    justify-content: space-between; align-items: center;
}
.faq-question::after { content: '+'; font-size: 20px; color: var(--text-muted); transition: transform var(--transition); }
.faq-item.open .faq-question::after { content: '-'; }
.faq-answer {
    max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer p { padding-bottom: 18px; font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* ==================== Auth ==================== */
.auth-section {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 100px 20px 40px;
}
.auth-card {
    width: 100%; max-width: 420px; background: var(--bg-card);
    border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 40px 32px; box-shadow: var(--shadow);
}
.auth-title { font-size: 28px; font-weight: 600; margin-bottom: 8px; text-align: center; }
.auth-subtitle { font-size: 14px; color: var(--text-secondary); text-align: center; margin-bottom: 28px; }
.auth-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--text-secondary); font-weight: 500; }
.form-group input {
    padding: 12px 14px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-primary); font-family: 'Outfit', sans-serif; font-size: 15px;
}
.form-group input:focus { outline: none; border-color: var(--accent); }
.form-group input::placeholder { color: var(--text-muted); }
.code-input { font-family: 'JetBrains Mono', monospace; font-size: 24px; letter-spacing: 8px; text-align: center; }
.form-error { font-size: 13px; color: var(--danger); min-height: 18px; }
.verify-text { font-size: 14px; color: var(--text-secondary); }
.forgot-link { display: block; text-align: center; margin-top: 12px; font-size: 13px; }
.auth-footer {
    text-align: center; margin-top: 24px; padding-top: 20px;
    border-top: 1px solid var(--border); font-size: 14px; color: var(--text-secondary);
}
.auth-footer a { margin-left: 6px; }

/* ==================== Dashboard ==================== */
.dashboard-section { padding: 100px 0 40px; }
.dashboard-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
.dashboard-header h1 { font-size: 28px; font-weight: 600; }
.loading { text-align: center; padding: 60px 0; color: var(--text-muted); font-size: 16px; }
.dash-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px; margin-bottom: 16px;
}
.dash-card h2 { font-size: 18px; font-weight: 600; margin-bottom: 14px; }
.sub-active { display: flex; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.sub-badge {
    display: inline-block; font-family: 'JetBrains Mono', monospace;
    font-size: 12px; font-weight: 500; padding: 4px 10px; border-radius: 6px;
}
.sub-badge.active { background: rgba(16, 185, 129, 0.15); color: var(--accent); }
.sub-badge.inactive { background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.sub-details { font-size: 14px; color: var(--text-secondary); display: flex; flex-direction: column; gap: 4px; }
.connect-btn {
    font-size: 18px; padding: 16px 32px;
    box-shadow: 0 4px 24px rgba(16, 185, 129, 0.3);
}
.connect-btn:hover {
    box-shadow: 0 6px 32px rgba(16, 185, 129, 0.45);
    transform: translateY(-2px);
}
.config-hint { font-size: 12px; color: var(--text-muted); }
.referral-code-group { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.referral-code-group code {
    font-family: 'JetBrains Mono', monospace; font-size: 16px;
    background: var(--bg-input); padding: 6px 14px; border-radius: 6px;
    color: var(--accent); letter-spacing: 2px;
}
.referral-stats { display: flex; gap: 24px; font-size: 14px; color: var(--text-secondary); margin-bottom: 8px; }
.referral-hint { font-size: 13px; color: var(--text-muted); }

/* ==================== Footer ==================== */
.site-footer {
    background: var(--bg-secondary); border-top: 1px solid var(--border);
    padding: 48px 0 24px;
}
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px;
    margin-bottom: 32px;
}
.footer-logo { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 16px; margin-bottom: 12px; }
.footer-logo .logo-icon { color: var(--accent); }
.footer-desc { font-size: 13px; color: var(--text-muted); }
.footer-col h4 { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 12px; }
.footer-col a { display: block; font-size: 13px; color: var(--text-secondary); padding: 4px 0; }
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-muted); }

@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero { padding: 120px 0 60px; min-height: auto; }
    .pricing-grid { grid-template-columns: 1fr; max-width: 360px; margin-left: auto; margin-right: auto; }
    .pricing-card-featured { transform: none; }
    .section { padding: 48px 0; }
}