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

/* Dark Theme (Default) */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --gradient-start: #6366f1;
    --gradient-end: #8b5cf6;
    --bg-dark: #0a0a0a;
    --bg-darker: #000000;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --card-bg: #1a1a1a;
    --border-color: #27272a;
    --success-color: #10b981;
    --bg-blur: rgba(10, 10, 10, 0.8);
    --gradient-bg-opacity: 0.15;
}

/* Light Theme */
[data-theme="light"] {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #7c3aed;
    --gradient-start: #4f46e5;
    --gradient-end: #7c3aed;
    --bg-dark: #ffffff;
    --bg-darker: #f9fafb;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --card-bg: #f9fafb;
    --border-color: #e5e7eb;
    --success-color: #059669;
    --bg-blur: rgba(255, 255, 255, 0.8);
    --gradient-bg-opacity: 0.08;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Background Effect */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(99, 102, 241, var(--gradient-bg-opacity)), transparent 70%);
    pointer-events: none;
    z-index: 0;
    transition: background 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    padding: 24px 0;
    position: sticky;
    top: 0;
    background: var(--bg-blur);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.nav {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--text-primary);
}

/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-secondary);
}

.theme-toggle:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.sun-icon,
.moon-icon {
    transition: opacity 0.3s ease;
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: block;
}

[data-theme="light"] .sun-icon {
    display: block;
}

[data-theme="light"] .moon-icon {
    display: none;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
}

.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    padding: 10px 28px;
    border-radius: 50px;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    box-shadow: 0 4px 24px rgba(99, 102, 241, 0.3);
    animation: float 3s ease-in-out infinite;
}

.hero-price-highlight {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.price-big {
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, #10b981, #059669);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    margin: 0 4px;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    box-shadow: 0 4px 24px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 32px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.btn-large {
    padding: 20px 40px;
    font-size: 18px;
}

.btn svg {
    width: 24px;
    height: 24px;
}

/* Trust Indicator */
.trust-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.stars {
    display: flex;
    gap: 8px;
    filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.6));
}

.star-icon {
    width: 32px;
    height: 32px;
    animation: starPulse 2s ease-in-out infinite;
}

.star-icon:nth-child(1) { animation-delay: 0s; }
.star-icon:nth-child(2) { animation-delay: 0.1s; }
.star-icon:nth-child(3) { animation-delay: 0.2s; }
.star-icon:nth-child(4) { animation-delay: 0.3s; }
.star-icon:nth-child(5) { animation-delay: 0.4s; }

@keyframes starPulse {
    0%, 100% { 
        transform: scale(1);
        filter: drop-shadow(0 0 4px rgba(255, 215, 0, 0.8));
    }
    50% { 
        transform: scale(1.1);
        filter: drop-shadow(0 0 12px rgba(255, 215, 0, 1));
    }
}

.reviews-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Features Section */
.features {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 64px;
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.2);
}

/* Light mode shadow adjustment */
[data-theme="light"] .feature-card:hover {
    box-shadow: 0 8px 32px rgba(79, 70, 229, 0.15);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-description {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: 80px 0;
    background: linear-gradient(180deg, transparent, rgba(99, 102, 241, 0.05), transparent);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
}

.step-number {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    margin: 0 auto 24px;
    box-shadow: 0 4px 24px rgba(99, 102, 241, 0.3);
}

.step-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.step-description {
    color: var(--text-secondary);
    font-size: 15px;
}

.step-arrow {
    font-size: 32px;
    color: var(--primary-color);
    flex-shrink: 0;
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
}

.cta-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 64px 32px;
    text-align: center;
}

.cta-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* Footer */
.footer {
    padding: 48px 0 32px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo-img {
    height: 32px;
    width: auto;
}

.footer-logo-text {
    font-size: 18px;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--text-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-price-highlight {
        font-size: 20px;
    }

    .price-big {
        font-size: 36px;
    }

    .star-icon {
        width: 28px;
        height: 28px;
    }

    .section-title {
        font-size: 32px;
    }

    .cta-title {
        font-size: 28px;
    }

    .steps {
        flex-direction: column;
        gap: 48px;
    }

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

    .features-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 16px;
    }

    .nav {
        gap: 16px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 80px 0 60px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-badge {
        font-size: 18px;
        padding: 8px 20px;
    }

    .hero-price-highlight {
        font-size: 18px;
    }

    .price-big {
        font-size: 32px;
    }

    .star-icon {
        width: 24px;
        height: 24px;
    }

    .logo-text {
        display: none;
    }

    .features,
    .how-it-works,
    .cta-section {
        padding: 60px 0;
    }
}