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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9eef3 100%);
    min-height: 100vh;
}

.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0a2540 0%, #1a5a7a 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.login-card {
    background: white;
    border-radius: 32px;
    padding: 2rem;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.3);
}

.btn-login {
    background: #0f3b5c;
    border: none;
    color: white;
    padding: 12px;
    border-radius: 40px;
    font-weight: 700;
    width: 100%;
    transition: 0.3s;
}

/* Carousel Custom Styles */
.carousel-slide-content {
    transition: transform 0.3s ease;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    background-size: 60% 60%;
    opacity: 0.9;
}

.carousel-control-prev-icon:hover,
.carousel-control-next-icon:hover {
    opacity: 1;
    transform: scale(1.1);
}

.carousel-indicators button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin: 0 5px;
    background-color: #0f3b5c;
    opacity: 0.5;
}

.carousel-indicators button.active {
    opacity: 1;
    background-color: #ffd966;
    transform: scale(1.2);
}

.carousel-item {
    transition: transform 0.6s ease-in-out;
}

/* Responsive carousel adjustments */
@media (max-width: 768px) {
    .carousel-slide-content {
        min-height: 350px !important;
    }
    
    .carousel-slide-content h3 {
        font-size: 1.2rem;
    }
    
    .carousel-slide-content p {
        font-size: 0.85rem;
    }
    
    .carousel-slide-content .fa-4x {
        font-size: 2.5rem;
    }
}
.btn-login:hover { background: #1e5a7d; transform: translateY(-2px); }

.required:after { content: " *"; color: #dc3545; }

.navbar { background: #0a2540 !important; padding: 1rem 0; }
.navbar-brand { font-weight: 700; font-size: 1.5rem; background: linear-gradient(135deg, #FFF, #b8e1fc); -webkit-background-clip: text; background-clip: text; color: transparent !important; }
.nav-link { color: #eef4ff !important; cursor: pointer; }
.nav-link:hover, .nav-link.active { color: #ffd966 !important; }

.welcome-card { background: linear-gradient(135deg, #0f3b5c, #1a5a7a); color: white; border-radius: 20px; }
.stats-chip { background: rgba(255,255,255,0.2); padding: 8px 16px; border-radius: 40px; }

.info-card { background: white; border-radius: 24px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); transition: 0.2s; cursor: pointer; }
.info-card:hover { transform: translateY(-5px); }

.glass-card { background: white; border-radius: 28px; box-shadow: 0 12px 30px rgba(0,0,0,0.08); padding: 1.5rem; }

.btn-primary-glow { background: #0f3b5c; color: white; padding: 12px; border-radius: 40px; font-weight: 600; width: 100%; border: none; }
.btn-primary-glow:hover { background: #1e5a7d; }

.timetable-table th { background: #0f3b5c; color: white; padding: 12px; text-align: center; }
.timetable-table td { text-align: center; padding: 12px; }
.class-session { background: #e8f4f8; border-radius: 12px; padding: 6px 10px; }

.results-table th { background: #f1f5f9; padding: 12px; }
.grade-A { color: #2e7d32; font-weight: bold; }
.grade-B { color: #1976d2; font-weight: bold; }

.form-control, .form-select { border-radius: 16px; border: 1px solid #e2e8f0; padding: 10px 16px; }
.form-control:focus, .form-select:focus { box-shadow: 0 0 0 3px rgba(31,100,130,0.2); border-color: #2c7da0; }

.invalid-feedback { display: none; font-size: 0.75rem; color: #dc3545; margin-top: 5px; }
.form-control.is-invalid ~ .invalid-feedback { display: block; }
.form-control.is-invalid { border-color: #dc3545; }
.form-control.is-valid { border-color: #198754; }

.footer-custom { background: #0a2540; color: #bfd9f0; padding: 2rem 0; margin-top: 3rem; border-radius: 30px 30px 0 0; }

@media (max-width: 768px) {
    .timetable-table td, .timetable-table th { font-size: 0.7rem; padding: 6px; }
    .login-card { padding: 1.5rem; }
}

.alert-danger { animation: shake 0.4s ease; }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-8px); } 75% { transform: translateX(8px); } }

.carousel-item img {
    border-radius: 20px;
}