:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #3b82f6;
    --danger: #dc2626;
    --success: #16a34a;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.5;
}

[dir="rtl"] body {
    font-family: 'Segoe UI', Tahoma, Arial, sans-serif;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.375rem;
    border: none;
    cursor: pointer;
    transition: background 0.15s;
}

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

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

.btn-outline {
    background: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-outline:hover {
    background: var(--gray-50);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.landing-header {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.landing-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-switch {
    padding: 0.5rem 1rem;
    color: var(--gray-500);
    font-size: 0.875rem;
    border-radius: 0.375rem;
    transition: background 0.15s;
}

.lang-switch:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: 5rem 0 6rem;
    text-align: center;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    color: white;
}

.hero-subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero .btn-primary {
    background: white;
    color: var(--primary);
    padding: 0.75rem 2rem;
    font-size: 1rem;
}

.hero .btn-primary:hover {
    background: var(--gray-100);
}

.features {
    padding: 5rem 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 0.5rem;
    transition: box-shadow 0.15s;
}

.feature-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--gray-500);
    font-size: 0.875rem;
    line-height: 1.5;
}

.landing-footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .hero {
        padding: 3rem 0 4rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .section-title {
        font-size: 1.25rem;
        margin-bottom: 2rem;
    }

    .landing-nav {
        height: auto;
        padding: 1rem 0;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-actions {
        width: 100%;
        justify-content: center;
    }
}

[dir="rtl"] .nav-actions {
    flex-direction: row-reverse;
}

h1 {
    margin-bottom: 1rem;
    color: var(--gray-900);
}