/* ============================================
   RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    --secondary-color: #7C3AED;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    --bg-gradient-start: #4F46E5;
    --bg-gradient-end: #7C3AED;
    --shadow-sm: 0 2px 8px rgba(79, 70, 229, 0.08);
    --shadow-md: 0 8px 30px rgba(79, 70, 229, 0.12);
    --shadow-lg: 0 20px 60px rgba(79, 70, 229, 0.15);
    --shadow-xl: 0 30px 80px rgba(79, 70, 229, 0.2);
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    padding-bottom: 30px;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-sm);
    padding: 12px 0;
}

.navbar .container {
    position: relative;
}

.navbar .btn-light {
    background: rgba(79, 70, 229, 0.08);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--primary-color);
    transition: var(--transition);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.navbar .btn-light:hover {
    background: rgba(79, 70, 229, 0.15);
    transform: scale(1.05);
}

.navbar .btn-outline-danger {
    border-radius: var(--radius-sm);
    padding: 8px 16px;
    transition: var(--transition);
}

.navbar .btn-outline-danger:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

/* ============================================
   CARD
   ============================================ */
.card {
    border: none !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: var(--transition) !important;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md) !important;
    transform: translateY(-4px);
}

.card-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    color: white !important;
}

.card-primary .card-body {
    color: white !important;
}

.card-primary .text-muted {
    color: rgba(255, 255, 255, 0.7) !important;
}

.card-primary .fw-semibold {
    color: white !important;
}

/* ============================================
   STUDENT CARD (Index)
   ============================================ */
.student-card {
    background: white !important;
    border: 2px solid transparent !important;
    border-radius: var(--radius-md) !important;
    padding: 16px 20px !important;
    transition: var(--transition) !important;
    box-shadow: var(--shadow-sm) !important;
    position: relative;
    overflow: hidden;
}

.student-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
    border-radius: var(--radius-md);
}

.student-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow-lg) !important;
    border-color: var(--primary-color) !important;
}

.student-card:hover::before {
    opacity: 0.05;
}

.student-card:hover .student-avatar {
    transform: scale(1.1);
    box-shadow: 0 4px 20px rgba(79, 70, 229, 0.3);
}

.student-avatar {
    width: 52px;
    height: 52px;
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    transition: var(--transition);
    box-shadow: 0 2px 10px rgba(79, 70, 229, 0.2);
}

/* ============================================
   MENU CARD (Dashboard)
   ============================================ */
.menu-card {
    background: white !important;
    border: 2px solid transparent !important;
    border-radius: var(--radius-md) !important;
    padding: 20px 16px !important;
    transition: var(--transition) !important;
    box-shadow: var(--shadow-sm) !important;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.menu-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: var(--transition);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.menu-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-lg) !important;
    border-color: var(--primary-color) !important;
}

.menu-card:hover::after {
    transform: scaleX(1);
}

.menu-card:hover .menu-icon {
    transform: scale(1.1) rotate(-5deg);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
}

.menu-card:hover .menu-icon i {
    color: white !important;
}

.menu-icon {
    width: 64px;
    height: 64px;
    background: rgba(79, 70, 229, 0.1) !important;
    border-radius: var(--radius-md) !important;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.menu-icon i {
    font-size: 28px;
    color: var(--primary-color);
    transition: var(--transition);
}

.menu-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #1F2937;
    letter-spacing: 0.3px;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-control, .form-select {
    border-radius: var(--radius-sm) !important;
    border: 2px solid #E5E7EB !important;
    padding: 12px 16px !important;
    font-size: 1rem !important;
    transition: var(--transition) !important;
    background: white !important;
    min-height: 50px;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1) !important;
    transform: translateY(-2px);
}

.form-control-lg {
    min-height: 56px !important;
    font-size: 1.1rem !important;
}

.form-select-lg {
    min-height: 56px !important;
    font-size: 1.1rem !important;
}

.input-group-text {
    border: 2px solid #E5E7EB !important;
    border-right: none !important;
    background: white !important;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm) !important;
    padding: 0 16px !important;
}

.input-group .form-control {
    border-left: none !important;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0 !important;
}

.input-group .form-control:focus {
    transform: translateY(0);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    border-radius: var(--radius-sm) !important;
    padding: 12px 24px !important;
    font-weight: 600 !important;
    transition: var(--transition) !important;
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    border: none !important;
    color: white !important;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3) !important;
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 30px rgba(79, 70, 229, 0.4) !important;
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-light {
    background: rgba(255, 255, 255, 0.9) !important;
    border: 2px solid #E5E7EB !important;
    color: #1F2937 !important;
}

.btn-light:hover {
    background: white !important;
    border-color: var(--primary-color) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline-danger {
    border: 2px solid var(--danger-color) !important;
    color: var(--danger-color) !important;
    background: transparent !important;
}

.btn-outline-danger:hover {
    background: var(--danger-color) !important;
    color: white !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.3);
}

.btn-lg {
    padding: 14px 32px !important;
    min-height: 56px;
    font-size: 1.05rem !important;
}

.btn-sm {
    padding: 8px 16px !important;
    min-height: 36px;
    font-size: 0.85rem !important;
}

/* ============================================
   ALERT / NOTIFICATION
   ============================================ */
.alert {
    border: none !important;
    border-radius: var(--radius-md) !important;
    padding: 16px 20px !important;
    box-shadow: var(--shadow-sm) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.alert-info {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(124, 58, 237, 0.08)) !important;
    color: var(--primary-color) !important;
    border-left: 4px solid var(--primary-color) !important;
}

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(16, 185, 129, 0.05)) !important;
    color: var(--success-color) !important;
    border-left: 4px solid var(--success-color) !important;
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(245, 158, 11, 0.05)) !important;
    color: var(--warning-color) !important;
    border-left: 4px solid var(--warning-color) !important;
}

.alert-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08), rgba(239, 68, 68, 0.05)) !important;
    color: var(--danger-color) !important;
    border-left: 4px solid var(--danger-color) !important;
}

/* ============================================
   DETAIL CARD (Data Siswa)
   ============================================ */
.detail-item {
    background: rgba(255, 255, 255, 0.6) !important;
    border-radius: var(--radius-sm) !important;
    padding: 16px 20px !important;
    transition: var(--transition) !important;
    border: 1px solid rgba(229, 231, 235, 0.5) !important;
}

.detail-item:hover {
    background: white !important;
    border-color: var(--primary-color) !important;
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.detail-item .label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #6B7280;
    margin-bottom: 4px;
}

.detail-item .value {
    font-size: 1rem;
    font-weight: 600;
    color: #1F2937;
}

/* ============================================
   DATA CARD (Modul)
   ============================================ */
.data-card {
    background: white !important;
    border-radius: var(--radius-md) !important;
    padding: 20px !important;
    transition: var(--transition) !important;
    border: 1px solid rgba(229, 231, 235, 0.3) !important;
    box-shadow: var(--shadow-sm) !important;
}

.data-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md) !important;
    border-color: var(--primary-color) !important;
}

.data-card .data-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #6B7280;
}

.data-card .data-value {
    font-size: 1rem;
    font-weight: 500;
    color: #1F2937;
    line-height: 1.6;
}

/* ============================================
   AVATAR LARGE
   ============================================ */
.avatar-lg {
    width: 120px;
    height: 120px;
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    box-shadow: 0 8px 40px rgba(79, 70, 229, 0.3);
    transition: var(--transition);
    border: 4px solid white;
}

.avatar-lg:hover {
    transform: scale(1.05) rotate(-5deg);
    box-shadow: 0 12px 50px rgba(79, 70, 229, 0.4);
}

/* ============================================
   LOGIN / SELECT PAGE
   ============================================ */
.login-card {
    background: rgba(255, 255, 255, 0.9) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-xl) !important;
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
}

.login-card .card-body {
    padding: 40px !important;
}

@media (min-width: 768px) {
    .login-card .card-body {
        padding: 50px !important;
    }
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(229, 231, 235, 0.3);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ============================================
   OFFICANVAS
   ============================================ */
.offcanvas {
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.offcanvas-header {
    border-bottom: 1px solid rgba(229, 231, 235, 0.5);
    padding: 20px 24px;
}

.offcanvas-body {
    padding: 0;
}

.offcanvas-body .list-group-item {
    border: none !important;
    padding: 16px 24px !important;
    transition: var(--transition) !important;
    border-radius: 0 !important;
}

.offcanvas-body .list-group-item:hover {
    background: rgba(79, 70, 229, 0.05) !important;
    padding-left: 32px !important;
}

.offcanvas-body .list-group-item i {
    width: 24px;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    padding: 60px 20px;
    text-align: center;
}

.empty-state i {
    font-size: 4rem;
    color: rgba(79, 70, 229, 0.15);
    margin-bottom: 20px;
}

.empty-state h5 {
    color: #1F2937;
    font-weight: 600;
}

.empty-state p {
    color: #6B7280;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 576px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
    
    .card-body {
        padding: 16px !important;
    }
    
    .menu-card .card-body {
        padding: 16px 12px !important;
    }
    
    .menu-icon {
        width: 48px;
        height: 48px;
    }
    
    .menu-icon i {
        font-size: 20px;
    }
    
    .menu-label {
        font-size: 0.75rem;
    }
    
    .avatar-lg {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }
    
    .student-avatar {
        width: 40px;
        height: 40px;
        font-size: 0.8rem;
    }
    
    .btn {
        padding: 10px 16px !important;
        font-size: 0.9rem !important;
        min-height: 44px;
    }
    
    .btn-lg {
        padding: 12px 20px !important;
        font-size: 0.95rem !important;
        min-height: 48px;
    }
    
    .login-card .card-body {
        padding: 24px !important;
    }
    
    .form-control, .form-select {
        padding: 10px 14px !important;
        font-size: 0.95rem !important;
        min-height: 44px;
    }
    
    .detail-item {
        padding: 12px 16px !important;
    }
    
    .data-card {
        padding: 16px !important;
    }
}

@media (min-width: 576px) and (max-width: 768px) {
    .container {
        padding-left: 24px;
        padding-right: 24px;
    }
}

/* ============================================
   LOADING SPINNER
   ============================================ */
.spinner-border {
    border-width: 3px;
}

.spinner-border.text-primary {
    border-color: var(--primary-color) !important;
    border-right-color: transparent !important;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    text-align: center;
    padding: 20px 0;
    color: #6B7280;
    font-size: 0.85rem;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ============================================
   GRADIENT TEXT
   ============================================ */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   BADGE
   ============================================ */
.badge-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    color: white !important;
    padding: 6px 14px !important;
    border-radius: 50px !important;
    font-weight: 600;
}

/* ============================================
   MISC
   ============================================ */
.shadow-hover {
    transition: var(--transition);
}

.shadow-hover:hover {
    box-shadow: var(--shadow-lg) !important;
}

.rounded-custom {
    border-radius: var(--radius-md) !important;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
}

.text-white-75 {
    color: rgba(255, 255, 255, 0.75);
}