/* General Styles */
body { 
    font-family: 'Segoe UI', Arial, sans-serif; 
    margin: 0; 
    background: #f0f2f5; 
}

.login-bg { 
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1524995997946-a1c2e315a42f') no-repeat center/cover; 
    height: 100vh; 
}

.header { 
    background: #fff; 
    padding: 15px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    box-shadow: 0 2px 8px rgba(0,0,0,0.1); 
    position: sticky; /* Fixed: 'sticky' ke pehle 'position' aayega */
    top: 0; 
    z-index: 1000;
}

.back-btn { background: #e4e6eb; padding: 8px 15px; border-radius: 6px; cursor: pointer; border: none; font-weight: 600; }
.logout-btn { background: #ff4757; color: white; border: none; padding: 8px 15px; border-radius: 6px; cursor: pointer; }

/* Grid for Classes */
.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 20px;
    max-width: 600px;
    margin: auto;
}

.card {
    background: white;
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    border: 2px solid #a5d8ff;
}

.card:hover { transform: scale(1.05); border-color: #007bff; background: #f8fbff; }
.icon { font-size: 22px; font-weight: 800; color: #333; margin-bottom: 5px; }
.card span { font-size: 13px; color: #666; font-weight: 600; }

/* Management & Builder Styles */
.management-header { padding: 20px; background: #fff; border-radius: 10px; margin: 10px; }
.add-box { display: flex; gap: 10px; }
.add-btn { background: #28a745; color: white; border: none; padding: 10px; border-radius: 5px; cursor: pointer; }

.lesson-item {
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    background: white; 
    padding: 15px; 
    margin: 10px; 
    border-radius: 8px; 
    border-left: 5px solid #007bff;
}

.btn-group button { padding: 5px 10px; margin-left: 5px; border: none; border-radius: 4px; cursor: pointer; }
.edit-btn { background: #ffc107; }
.del-btn { background: #dc3545; color: white; }
.open-btn { background: #007bff; color: white; }

.builder-layout { display: flex; gap: 20px; padding: 20px; }
.left-panel, .right-panel { flex: 1; background: white; padding: 20px; border-radius: 12px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }

input, textarea { width: 100%; padding: 10px; margin: 10px 0; border: 1px solid #ddd; border-radius: 5px; box-sizing: border-box; }
.action-btn { background: #007bff; color: white; width: 100%; padding: 10px; border: none; border-radius: 5px; }

.login-card { width: 350px; margin: 15vh auto; background: white; padding: 30px; border-radius: 15px; text-align: center; }

/* --- Fixed: Print Area Styles for PDF --- */
#printArea {
    background: white;
    width: 750px;
    margin: 20px auto;
    padding: 30px;
    box-sizing: border-box; /* Padding ko width ke andar rakhega */
    border: 2px solid #000;
}

@media print {
    body * { visibility: hidden; }
    #printArea, #printArea * { visibility: visible; }
    #printArea { position: absolute; left: 0; top: 0; width: 100%; border: none; }
}