/* ===========================================
   Auth / Login Pages (admin, guru, siswa)
   =========================================== */

.main-panel {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.main-panel::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-image) center/cover no-repeat;
    opacity: 0.1;
    z-index: 1;
}

.login-container {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    padding: 0 20px;
}

.login-card {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    border: 1px solid rgba(255,255,255,0.2);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: slideInUp 0.6s ease-out;
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 80px rgba(0,0,0,0.25);
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border: none !important;
    padding: 1.5rem 2rem !important;
    margin-bottom: 0 !important;
}

.card-header .card-title {
    color: white !important;
    font-size: 1.3rem !important;
    font-weight: 600 !important;
    margin-bottom: 0.5rem !important;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.card-header .card-category {
    color: rgba(255,255,255,0.8) !important;
    font-size: 0.9rem !important;
    margin-bottom: 0 !important;
}

.card-body {
    padding: 2rem !important;
    margin: 0 !important;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-control {
    border-radius: 12px !important;
    border: 2px solid #e2e8f0 !important;
    padding: 0.75rem 1rem !important;
    font-size: 0.95rem !important;
    transition: all 0.3s ease !important;
    background: rgba(255,255,255,0.9) !important;
}

.form-control:focus {
    border-color: #667eea !important;
    box-shadow: 0 0 0 3px rgba(102,126,234,0.1) !important;
    background: white !important;
    transform: translateY(-1px);
}

.bmd-label-floating {
    color: #4a5568 !important;
    font-weight: 500 !important;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border: none !important;
    border-radius: 12px !important;
    padding: 0.75rem 1.5rem !important;
    font-weight: 600 !important;
    font-size: 1rem !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
    transition: all 0.3s ease !important;
    position: relative !important;
    overflow: hidden !important;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 25px rgba(102,126,234,0.4) !important;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:active {
    transform: translateY(0) !important;
}

.form-check {
    margin: 1.5rem 0;
}

.form-check-label {
    color: #4a5568 !important;
    font-size: 0.9rem !important;
    cursor: pointer;
}

a {
    color: #667eea !important;
    text-decoration: none !important;
    font-weight: 500 !important;
    transition: color 0.3s ease !important;
}

a:hover {
    color: #764ba2 !important;
    text-decoration: underline !important;
}

.copyright-section {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    border-top: 1px solid rgba(0,0,0,0.1);
    padding: 1rem;
}

.copyright-section small {
    color: #718096 !important;
    font-weight: 500;
}

@keyframes slideInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

.btn-loading {
    position: relative;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px; height: 16px;
    margin: auto; top: 0; bottom: 0; left: 0; right: 0;
    border: 2px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: button-loading-spinner 1s ease infinite;
}

@keyframes button-loading-spinner {
    from { transform: rotate(0turn); }
    to   { transform: rotate(1turn); }
}

@media (max-width: 576px) {
    .login-container { padding: 0 15px; }
    .school-logo { max-height: 70px; max-width: 140px; }
    .school-name { font-size: 1.2rem; }
    .card-body { padding: 1.5rem !important; }
    .school-info-section { padding: 1.5rem 1rem 1rem !important; }
}