:root {
    --glass-light: rgba(255, 255, 255, 0.7);
    --glass-dark: rgba(28, 28, 30, 0.7);
}

body {
    font-family: 'Noto Naskh Arabic', sans-serif;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s, color 0.3s;
}

/* School Sketch Background */
.bg-sketch {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    /* Placeholder Sketch Image */
    background-image: url('https://images.unsplash.com/photo-1541829070764-84a7d30dd3f3?q=80&w=2568&auto=format&fit=crop'); 
    background-size: cover;
    background-position: center;
    opacity: 0.08;
    filter: grayscale(100%) contrast(120%);
    pointer-events: none;
}

.dark .bg-sketch {
    opacity: 0.05;
    mix-blend-mode: overlay;
}

/* Glassmorphism Header */
.glass-header {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: background-color 0.3s;
}
.dark .glass-header {
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

/* Card Styling */
.student-card {
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.student-card:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

/* Input Focus */
.search-input:focus {
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.2);
}

/* Hall Grid Logic */
.hall-grid {
    display: grid;
    gap: 12px;
    justify-content: center;
    padding: 20px;
    border-radius: 20px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.02);
}

/* Seat Base */
.seat {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

/* Seat Status Colors */
.seat.empty { background-color: #e5e5ea; color: #86868b; }
.seat.taken { background-color: #d1d1d6; color: #86868b; }

.dark .seat.empty { background-color: #3a3a3c; color: #98989d; }
.dark .seat.taken { background-color: #636366; color: #aeaeb2; }

/* RED SEAT (The Target) */
.seat.my-seat {
    background-color: #ff3b30 !important;
    color: white !important;
    transform: scale(1.2);
    box-shadow: 0 0 20px rgba(255, 59, 48, 0.5);
    z-index: 10;
    font-weight: bold;
}

.seat.my-seat::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 12px;
    border: 2px solid #ff3b30;
    animation: pulse-ring 2s infinite;
}

/* Animations */
@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.6); opacity: 0; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.6s ease-out forwards; }