/* ===== CSS Variables ===== */
:root {
    --primary: #F0B90B;
    --primary-dark: #D9A309;
    --bg: #0B0E11;
    --bg-secondary: #1E2329;
    --text-primary: #EAECEF;
    --text-secondary: #B7BDC6;
    --text-tertiary: #848E9C;
    --border: #2B3139;
    --success: #10B981;
    --error: #EF4444;
    --accent-rgb: 240, 185, 11;
}

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

html {
    scroll-behavior: smooth;
}

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

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

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(11, 14, 17, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 24px;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: color 0.2s;
}

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

.lang-toggle {
    background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.15) 0%, rgba(var(--accent-rgb), 0.08) 100%);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    border-radius: 8px;
    padding: 6px 14px;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.lang-toggle:hover {
    background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.25) 0%, rgba(var(--accent-rgb), 0.15) 100%);
    border-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(var(--accent-rgb), 0.3);
}

.lang-toggle:active {
    transform: translateY(0);
}

/* ===== Hero Section ===== */
.hero {
    padding: 160px 0 100px;
    background: radial-gradient(circle at 50% 0%, rgba(240, 185, 11, 0.1) 0%, transparent 50%);
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.15) 0%, rgba(var(--accent-rgb), 0.05) 100%);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 32px;
}

.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(--primary) 0%, #FCD535 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #000;
    box-shadow: 0 4px 16px rgba(var(--accent-rgb), 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.4);
}

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

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

.btn-disabled {
    background: var(--bg-secondary);
    color: var(--text-tertiary);
    cursor: not-allowed;
    opacity: 0.5;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-tertiary);
}

/* ===== Features Section ===== */
.features {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

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

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(var(--accent-rgb), 0.4);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== How It Works ===== */
.how-it-works {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 250px;
    max-width: 300px;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #000;
    font-size: 28px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.step-content h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

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

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

/* ===== Download Section ===== */
.download {
    padding: 100px 0;
}

.download-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 60px;
    text-align: center;
}

.download-card h2 {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
}

.download-card>p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 48px;
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.download-option {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    position: relative;
}

.download-option.recommended {
    border-color: var(--primary);
    box-shadow: 0 0 24px rgba(var(--accent-rgb), 0.2);
}

.recommended-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #000;
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
}

.download-option h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.download-option p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 14px;
}

.installation-steps {
    background: var(--bg);
    border-radius: 16px;
    padding: 32px;
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.installation-steps h3 {
    font-size: 20px;
    margin-bottom: 20px;
    text-align: center;
}

.installation-steps ol {
    padding-left: 24px;
}

.installation-steps li {
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.7;
}

.installation-steps code {
    background: var(--bg-secondary);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--primary);
    font-size: 14px;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 12px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

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

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

    .hero-description {
        font-size: 16px;
    }

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

    .hero-stats {
        gap: 24px;
    }

    .nav-links {
        display: none;
    }

    .section-header h2 {
        font-size: 32px;
    }

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

    .steps {
        flex-direction: column;
    }

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

    .download-card {
        padding: 32px 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}