:root {
    --primary-color: #0f172a; /* Slate 900 */
    --accent-color: #3b82f6; /* Blue 500 */
    --text-color: #334155; /* Slate 700 */
    --bg-color: #f8fafc; /* Slate 50 */
    --card-bg: #ffffff;
    --heading-color: #1e293b; /* Slate 800 */
    --border-color: #e2e8f0; /* Slate 200 */
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

header h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    color: var(--text-color);
    opacity: 0.8;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    padding: 2rem;
    margin-bottom: 2rem;
}

h2 {
    color: var(--heading-color);
    font-size: 1.5rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
}

h2::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 24px;
    background-color: var(--accent-color);
    margin-right: 12px;
    border-radius: 3px;
}

[dir="rtl"] h2::before {
    margin-right: 0;
    margin-left: 12px;
}

p {
    margin-bottom: 1rem;
}

ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

[dir="rtl"] ul {
    padding-left: 0;
    padding-right: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.language-switch {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

[dir="rtl"] .language-switch {
    right: auto;
    left: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    text-decoration: none;
    transition: all 0.2s;
}

.btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    text-decoration: none;
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: #64748b;
    font-size: 0.875rem;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    header h1 {
        font-size: 2rem;
    }
    .card {
        padding: 1.5rem;
    }
}