/* Hero SMS - Complete Styles with Dark Mode */
:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --success: #48bb78;
    --warning: #ed8936;
    --danger: #f56565;
    --info: #4299e1;
    
    --bg-body: #ffffff;
    --bg-card: #ffffff;
    --bg-section: #f8f9fa;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border: #e2e8f0;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    
    --radius: 8px;
    --radius-lg: 16px;
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    --bg-body: #1a202c;
    --bg-card: #2d3748;
    --bg-section: #2d3748;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --border: #4a5568;
    --shadow: 0 4px 6px rgba(0,0,0,0.4);
}

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

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: all var(--transition);
}

[data-theme="dark"] .header {
    background: rgba(26,32,44,0.95);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.nav { display: flex; gap: 30px; align-items: center; }

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

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

/* Theme Toggle */
.theme-toggle {
    width: 45px;
    height: 45px;
    border: 2px solid var(--border);
    border-radius: 50%;
    background: var(--bg-card);
    cursor: pointer;
    font-size: 20px;
    transition: all var(--transition);
}

.theme-toggle:hover {
    border-color: var(--primary);
    transform: rotate(15deg);
}

/* Language Selector */
.language-selector { position: relative; }

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    cursor: pointer;
    transition: all var(--transition);
}

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

.lang-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    min-width: 200px;
    z-index: 1001;
}

.lang-menu.active { display: block; }

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-primary);
    text-decoration: none;
    transition: background var(--transition);
}

.lang-option:hover { background: var(--bg-section); }

/* Hero */
.hero {
    padding: 150px 0 100px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    text-align: center;
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 30px;
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

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

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

.section-header h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 15px;
}

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

.feature-card {
    background: var(--bg-card);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 10px;
}

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

/* Footer */
.footer {
    background: var(--bg-section);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border);
}

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

.footer-col h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    padding: 5px 0;
    text-decoration: none;
    transition: color var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 36px; }
    .hero p { font-size: 16px; }
    .nav { display: none; }
}