/* =============================================
   VPNPROUS LTD — PREMIUM DESIGN SYSTEM v2.0
   ============================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    /* Premium Color Palette */
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #ef4444;
    --accent-light: #f87171;
    --accent-gradient: linear-gradient(135deg, #ef4444, #f97316);
    --gold: #f59e0b;
    --gold-light: #fbbf24;
    --gold-gradient: linear-gradient(135deg, #f59e0b, #eab308);
    --blue: #3b82f6;
    --blue-light: #60a5fa;
    --blue-gradient: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --green: #10b981;
    --green-light: #34d399;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --teal: #14b8a6;
    --orange: #f97316;
    
    /* Surfaces */
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --card: #ffffff;
    --card-border: rgba(0,0,0,0.06);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    
    /* Text */
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    
    /* Radius */
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
}

/* =============================================
   PREMIUM NAVIGATION
   ============================================= */
.nav {
    position: fixed; top: 0; left: 0; right: 0;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(24px) saturate(1.8);
    -webkit-backdrop-filter: blur(24px) saturate(1.8);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    z-index: 1000;
    padding: 0 32px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 24px;
    font-weight: 900;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.5px;
}

.nav-logo .logo-icon {
    width: 36px; height: 36px;
    background: var(--accent-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    font-weight: 800;
}

.nav-logo .accent { 
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 50px;
    transition: var(--transition);
}

.nav-links a:hover { 
    color: var(--primary);
    background: rgba(0,0,0,0.04);
}

.nav-links .btn-nav {
    background: var(--accent-gradient);
    color: white !important;
    padding: 10px 24px;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(239,68,68,0.3);
}

.nav-links .btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(239,68,68,0.4);
}

/* =============================================
   PREMIUM HERO SECTION
   ============================================= */
.hero {
    padding: 160px 32px 100px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #0f172a 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(239,68,68,0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(139,92,246,0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 0%, rgba(245,158,11,0.08) 0%, transparent 50%);
    animation: heroFloat 30s ease-in-out infinite;
    pointer-events: none;
}

@keyframes heroFloat {
    0%, 100% { transform: translate(0,0) rotate(0deg); }
    33% { transform: translate(2%,-1%) rotate(1deg); }
    66% { transform: translate(-1%,1%) rotate(-0.5deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 850px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, #ef4444, #f97316, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero h1 .gradient-blue {
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 18px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 36px;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Premium Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 36px;
    border-radius: 60px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 8px 30px rgba(239,68,68,0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(239,68,68,0.45);
}

.btn-gold {
    background: var(--gold-gradient);
    color: var(--primary);
    box-shadow: 0 8px 30px rgba(245,158,11,0.35);
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(245,158,11,0.45);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    border-color: rgba(255,255,255,0.5);
    background: rgba(255,255,255,0.05);
    transform: translateY(-3px);
}

.btn-telegram {
    background: linear-gradient(135deg, #0088cc, #00a2f0);
    color: white;
    box-shadow: 0 8px 30px rgba(0,136,204,0.35);
}

.btn-telegram:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0,136,204,0.45);
}

.btn-sm {
    padding: 12px 24px;
    font-size: 14px;
}

/* =============================================
   SECTIONS
   ============================================= */
.section {
    padding: 100px 32px;
}

.section-alt {
    background: var(--bg-alt);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(239,68,68,0.08);
    color: var(--accent);
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: -1px;
    line-height: 1.15;
}

.section-title .gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.6;
}

/* =============================================
   VPN APP CARDS — PREMIUM
   ============================================= */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.app-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    border-radius: 24px 24px 0 0;
}

.app-card[data-color="blue"]::before { background: var(--blue-gradient); }
.app-card[data-color="green"]::before { background: linear-gradient(135deg, #10b981, #34d399); }
.app-card[data-color="purple"]::before { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.app-card[data-color="orange"]::before { background: linear-gradient(135deg, #f97316, #fb923c); }

.app-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.app-card .app-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 32px;
    font-weight: 800;
    color: white;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.app-card[data-color="blue"] .app-icon { background: var(--blue-gradient); }
.app-card[data-color="green"] .app-icon { background: linear-gradient(135deg, #10b981, #34d399); }
.app-card[data-color="purple"] .app-icon { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.app-card[data-color="orange"] .app-icon { background: linear-gradient(135deg, #f97316, #fb923c); }

.app-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.app-card .app-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.4;
}

.app-card .app-features {
    list-style: none;
    margin-bottom: 20px;
    text-align: left;
}

.app-card .app-features li {
    font-size: 12px;
    color: var(--text-muted);
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.app-card .app-features li::before {
    content: '✓';
    color: var(--green);
    font-weight: 700;
}

.app-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    width: 100%;
    justify-content: center;
}

.app-download-btn.play {
    background: #0f172a;
    color: white;
}

.app-download-btn.play:hover {
    background: #1e293b;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.app-download-btn.telegram {
    background: linear-gradient(135deg, #0088cc, #00a2f0);
    color: white;
}

/* =============================================
   PRICING — PREMIUM
   ============================================= */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.pricing-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border-color: var(--accent);
    background: linear-gradient(135deg, #fef2f2, #fff7ed);
    box-shadow: 0 10px 40px rgba(239,68,68,0.12);
    transform: scale(1.02);
}

.pricing-card.featured:hover {
    transform: scale(1.02) translateY(-4px);
}

.pricing-card .pricing-badge {
    display: inline-block;
    background: var(--accent-gradient);
    color: white;
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.pricing-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.pricing-card .price {
    font-size: 36px;
    font-weight: 900;
    color: var(--primary);
    letter-spacing: -1px;
}

.pricing-card .price span {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-muted);
}

.pricing-card .price-sub {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.pricing-card .savings {
    display: inline-block;
    background: rgba(239,68,68,0.08);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 20px;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 24px;
}

.pricing-card ul li {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pricing-card ul li::before {
    content: '✓';
    color: var(--green);
    font-weight: 700;
}

/* =============================================
   FEATURES GRID
   ============================================= */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.feature-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-card .icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* =============================================
   STATS SECTION
   ============================================= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.stat-card {
    text-align: center;
    padding: 32px 20px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-card .number {
    font-size: 40px;
    font-weight: 900;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card .label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.6);
    padding: 80px 32px 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
}

.footer h3 { 
    color: white; 
    font-size: 16px; 
    margin-bottom: 20px; 
    font-weight: 700;
}

.footer a {
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    font-size: 14px;
    display: block;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer a:hover { color: white; }

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    margin-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 13px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
    .apps-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-toggle { display: flex; }
    .hero h1 { font-size: 32px; }
    .section-title { font-size: 28px; }
    .apps-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .pricing-card.featured { transform: none; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 26px; }
    .hero-btns { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
}