:root {
    --bg-color: #050505;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --accent-glow: linear-gradient(90deg, #007aff, #34c759);
    --card-bg: rgba(255, 255, 255, 0.04);
    --card-border: rgba(255, 255, 255, 0.08);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Typography */
h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

h3 {
    font-size: clamp(1.5rem, 2.5vw, 2.2rem);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.gradient-text {
    background: var(--accent-glow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 4rem;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--card-border);
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.3s ease;
}

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

.lang-switch {
    background: var(--card-bg);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    border: 1px solid var(--card-border);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.15) 0%, rgba(5, 5, 5, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    margin-bottom: 4rem;
}

/* Buttons */
.cta-button {
    display: inline-block;
    background: var(--text-primary);
    color: var(--bg-color);
    padding: 1rem 2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    margin-top: 2rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-button:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.15);
}

.cta-button.secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-secondary);
}

.cta-button.secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-primary);
    box-shadow: none;
}

/* Visual Mockup */
.hero-visual {
    width: 100%;
    max-width: 900px;
    perspective: 1000px;
}

.mockup-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.01) 100%);
    border-radius: 24px;
    border: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: rotateX(10deg);
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    transition: transform 0.5s ease;
}

.mockup-placeholder:hover {
    transform: rotateX(0deg);
}

.glass-card {
    background: rgba(20, 20, 20, 0.6);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    text-align: left;
    width: 300px;
}

.mock-title {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.mock-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: var(--accent-glow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.mock-chart {
    height: 60px;
    width: 100%;
    background: linear-gradient(90deg, rgba(0,122,255,0.2) 0%, rgba(52,199,89,0.2) 100%);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}
.mock-chart::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-glow);
}

/* Features */
.features-section {
    padding: 8rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature {
    display: flex;
    align-items: center;
    gap: 6rem;
    margin-bottom: 8rem;
}

.feature.reverse {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-text p {
    margin: 0;
    font-size: 1.25rem;
}

.feature-image {
    flex: 1;
    height: 400px;
    border-radius: 24px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 8rem 2rem;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.02));
    border-top: 1px solid var(--card-border);
}

.cta-section p {
    margin-bottom: 2rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.2s;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem 2rem;
    }
    .nav-links {
        display: none;
    }
    .feature, .feature.reverse {
        flex-direction: column;
        gap: 3rem;
        text-align: center;
    }
    .hero-content {
        margin-top: 4rem;
    }
}