:root {
    --bg-color: #0b0b0b;
    --card-bg: #161616;
    --accent-color: #00d4ff; /* لون أزرق إشعاعي */
    --text-color: #e0e0e0;
    --metallic-gradient: linear-gradient(145deg, #2a2a2a, #1a1a1a);
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    direction: rtl;
}

.container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    text-align: center;
}

h1 {
    font-size: 2rem;
    margin-bottom: 30px;
    background: linear-gradient(to bottom, #fff, #888);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    width: 100%;
    max-width: 500px;
}

.card {
    background: var(--metallic-gradient);
    border: 1px solid #333;
    border-radius: 15px;
    padding: 30px;
    text-decoration: none;
    color: white;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 0 15px var(--accent-color);
}

.card i {
    font-size: 3rem;
    margin-bottom: 15px;
}

.footer {
    padding: 20px;
    text-align: center;
    font-size: 0.8rem;
    color: #666;
    border-top: 1px solid #222;
}
.pdf-item {
    background: var(--metallic-gradient);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #444;
    cursor: pointer;
    transition: 0.3s;
}
.pdf-item:hover {
    border-color: var(--accent-color);
    transform: scale(1.05);
}