/* CSS Variables */
:root {
    --color-bg: #000000;
    --color-bg-secondary: #0a0a0a;
    --color-bg-tertiary: #141414;
    --color-text: #ffffff;
    --color-text-secondary: #8a8a8a;
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-accent: #8b5cf6;
    --color-border: #1f1f1f;
    --color-success: #22c55e;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 16px;
    --shadow: 0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header / Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    border-bottom-color: var(--color-border);
    background-color: rgba(0, 0, 0, 0.8);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--color-primary);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-background {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 50% 30%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
        var(--color-bg);
}

@keyframes gradient-shift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.85; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.813rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.04em;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    font-weight: 400;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.938rem;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-text-secondary);
    color: var(--color-text);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-outline:hover {
    background-color: var(--color-bg-tertiary);
    border-color: var(--color-text-secondary);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: clamp(1.875rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.03em;
}

/* Features Section */
.features {
    background-color: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    padding: var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.938rem;
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    background-color: var(--color-bg);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: var(--spacing-md);
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.step p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.step-arrow {
    font-size: 2rem;
    color: var(--color-primary);
    flex-shrink: 0;
}

/* POP Network Section */
.pop-network {
    background-color: var(--color-bg-secondary);
}

.world-map {
    position: relative;
    width: 100%;
    max-width: 900px;
    height: 500px;
    margin: 0 auto var(--spacing-md);
    background: 
        radial-gradient(2px 2px at 20% 30%, var(--color-border), transparent),
        radial-gradient(2px 2px at 60% 70%, var(--color-border), transparent),
        radial-gradient(2px 2px at 50% 50%, var(--color-border), transparent),
        radial-gradient(2px 2px at 80% 10%, var(--color-border), transparent),
        radial-gradient(2px 2px at 90% 60%, var(--color-border), transparent),
        radial-gradient(3px 3px at 30% 80%, var(--color-border), transparent);
    background-size: 50px 50px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.pop-location {
    position: absolute;
    transform: translate(-50%, -50%);
}

.pop-dot {
    width: 16px;
    height: 16px;
    background-color: var(--color-primary);
    border-radius: 50%;
    position: relative;
    animation: pulse 2s ease-in-out infinite;
}

.pop-dot::before {
    content: '';
    position: absolute;
    inset: -8px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    animation: ripple 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

@keyframes ripple {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(2); opacity: 0; }
}

.pop-label {
    position: absolute;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
}

.network-caption {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* Performance Section */
.performance {
    background-color: var(--color-bg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.stat-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    display: inline-block;
    letter-spacing: -0.02em;
}

.stat-unit {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-primary);
    display: inline-block;
    margin-left: 0.25rem;
}

.stat-label {
    margin-top: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* Pricing Section */
.pricing {
    background-color: var(--color-bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    position: relative;
    padding: var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
}

.pricing-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
    border-color: rgba(99, 102, 241, 0.6);
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, rgba(99, 102, 241, 0.03) 100%);
}

.badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-primary);
    color: white;
    padding: 0.313rem 0.875rem;
    border-radius: 100px;
    font-size: 0.688rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.plan-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.plan-price {
    margin-bottom: var(--spacing-md);
}

.currency {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    vertical-align: top;
    font-weight: 500;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.02em;
}

.period {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.plan-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
    text-align: left;
}

.plan-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.plan-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 700;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg) 100%);
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.cta h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--spacing-sm);
}

.cta p {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

/* Footer */
.footer {
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-md);
}

.footer-main .logo {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    letter-spacing: -0.03em;
}

.footer-tagline {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
    font-weight: 400;
}

.footer-links a:hover {
    color: var(--color-text);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    color: var(--color-text-secondary);
    font-size: 0.813rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-bg-secondary);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-120%);
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .steps {
        flex-direction: column;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .world-map {
        height: 400px;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .footer-links {
        flex-wrap: wrap;
        gap: var(--spacing-sm) var(--spacing-md);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .features-grid,
    .stats-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .world-map {
        height: 300px;
    }

    .pop-label {
        font-size: 0.65rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles */
a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Selection Styles */
::selection {
    background-color: var(--color-primary);
    color: white;
}