/* CSS Reset & Variables */
:root {
    --bg-color: #050505;
    --surface-color: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #0A84FF;
    --accent-hover: #0070df;
    --glass-bg: rgba(26, 26, 26, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

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

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-color);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(180deg, #FFFFFF 0%, #AAAAAA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    background-color: white;
    color: black;
    padding: 16px 32px;
    font-size: 1.1rem;
    border-radius: 40px;
}

.btn-large:hover {
    background-color: #f0f0f0;
    color: black;
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.2rem;
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.lang-selector {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    padding: 6px 12px;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
}

.lang-selector option {
    background: var(--surface-color);
}

/* Sections */
.section {
    padding: 100px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    text-align: center;
    padding-top: 150px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-size: 4rem;
    max-width: 800px;
    margin: 0 auto 20px;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-image-wrapper {
    position: relative;
    margin-top: 60px;
    width: 100%;
    max-width: 900px;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: 20px;
    position: relative;
    z-index: 2;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(10, 132, 255, 0.3) 0%, rgba(0,0,0,0) 70%);
    z-index: 1;
    filter: blur(60px);
}

/* Features */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--surface-color);
    border: 1px solid var(--glass-border);
    padding: 40px;
    border-radius: 24px;
    text-align: left;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255,255,255,0.2);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

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

/* FAQ */
.faq {
    max-width: 800px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-item {
    background: var(--surface-color);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

.faq-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--accent-color);
}

.faq-item p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    border-top: 1px solid var(--glass-border);
    padding: 60px 20px 20px;
    background: #000;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-left {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-right {
    text-align: right;
    color: var(--text-secondary);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    color: #666;
    font-size: 0.9rem;
}

/* Animations */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-title { font-size: 2.5rem; }
    .footer-content { flex-direction: column; gap: 20px; text-align: center; }
    .footer-right { text-align: center; width: 100%; }
}