:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 18px;
    color: var(--text-primary);
    text-decoration: none;
}

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

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

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

.nav-links a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.logo {
    text-decoration: none;
    color: inherit;
}

.github-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.github-link:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 22px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.5;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    padding: 20px;
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    top: 0;
    left: 0;
    width: 280px;
    animation-delay: 0s;
}

.card-2 {
    top: 120px;
    right: 0;
    width: 240px;
    animation-delay: 2s;
}

.card-3 {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 260px;
    animation-delay: 4s;
}

.card-header {
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    margin-bottom: 16px;
}

.card-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.line {
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
}

.line.short {
    width: 60%;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Features Section */
.features {
    padding: 100px 0;
    background-color: var(--bg-primary);
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

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

/* About Section */
.about {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 60px;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-secondary);
}

/* CTA Section */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta p {
    font-size: 20px;
    margin-bottom: 32px;
    opacity: 0.9;
}

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

.cta .btn-primary:hover {
    background-color: var(--bg-secondary);
    transform: translateY(-2px);
}

.cta-note {
    margin-top: 20px;
    font-size: 14px;
    opacity: 0.9;
    line-height: 1.6;
}

/* Footer */
.footer {
    padding: 60px 0 30px;
    background-color: var(--text-primary);
    color: var(--text-light);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: white;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: white;
}

.footer .logo {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-title {
        font-size: 42px;
    }

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

    .hero-visual {
        height: 300px;
    }

    .floating-card {
        width: 200px !important;
    }

    .section-title {
        font-size: 36px;
    }

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

    .stats {
        gap: 40px;
    }

    .nav-links {
        gap: 16px;
    }

    .nav-links a:not(.github-link):not(.active) {
        display: none;
    }
    
    .nav-links a.active {
        display: inline-block;
    }

    .cta h2 {
        font-size: 32px;
    }

    .cta p {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0 60px;
    }

    .hero-title {
        font-size: 36px;
    }

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

    .btn {
        width: 100%;
    }

    .features,
    .about,
    .cta {
        padding: 60px 0;
    }
}

/* Privacy Page Styles */
.privacy-hero {
    padding: 100px 0 60px;
    background: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
    text-align: center;
}

.privacy-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.privacy-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.privacy-content {
    padding: 80px 0;
    background-color: var(--bg-primary);
}

.privacy-text {
    max-width: 800px;
    margin: 0 auto;
}

.privacy-text .intro {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 48px;
    padding-bottom: 32px;
    border-bottom: 2px solid var(--border-color);
}

.privacy-text h2 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 48px;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.privacy-text h2:first-of-type {
    margin-top: 0;
}

.privacy-text h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 32px;
    margin-bottom: 12px;
}

.privacy-text h3 strong {
    font-weight: 600;
    color: var(--primary-color);
}

.privacy-text p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.privacy-text ul {
    margin-left: 24px;
    margin-bottom: 24px;
    color: var(--text-secondary);
}

.privacy-text ul li {
    margin-bottom: 12px;
    line-height: 1.7;
    padding-left: 8px;
}

.privacy-text ul li strong {
    color: var(--text-primary);
    font-weight: 600;
}

.privacy-text a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.privacy-text a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.privacy-note {
    margin-top: 48px;
    padding: 24px;
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.privacy-note p {
    margin: 0;
    font-size: 15px;
    color: var(--text-secondary);
}

.privacy-note strong {
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .privacy-title {
        font-size: 42px;
    }

    .privacy-text h2 {
        font-size: 24px;
    }

    .privacy-text h3 {
        font-size: 18px;
    }

    .privacy-text .intro {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .privacy-hero {
        padding: 80px 0 40px;
    }

    .privacy-title {
        font-size: 36px;
    }

    .privacy-content {
        padding: 60px 0;
    }

    .privacy-text ul {
        margin-left: 20px;
    }
}