/* ========================================
   ROOT VARIABLES
   ======================================== */
:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --success-color: #4c9f70;
    --danger-color: #f72585;
    --warning-color: #f8961e;
    --info-color: #4cc9f0;
    --dark-color: #1e3c72;
    --light-color: #f8f9fa;
    
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
    --danger-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --warning-gradient: linear-gradient(135deg, #ffe259 0%, #ffa751 100%);
    --info-gradient: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    
    --box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    --box-shadow-hover: 0 20px 50px rgba(0,0,0,0.12);
    --border-radius: 15px;
    --border-radius-sm: 10px;
}

/* ========================================
   GLOBAL STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* ========================================
   CARD STYLES
   ======================================== */
.card {
    background: white;
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 25px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-hover);
}

.card-header {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-bottom: 2px solid rgba(67, 97, 238, 0.1);
    padding: 1.2rem 1.5rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.card-header h5, 
.card-header h6 {
    margin: 0;
    color: var(--dark-color);
    font-weight: 700;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background: #f8f9fa;
    border-top: 1px solid rgba(0,0,0,0.05);
    padding: 1rem 1.5rem;
}

/* ========================================
   NAVBAR STYLES
   ======================================== */
.navbar {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%) !important;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 0.8rem 0;
    transition: all 0.3s ease;
}

.navbar.sticky-top {
    position: sticky;
    top: 0;
    z-index: 1030;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
    transition: transform 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: white !important;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.6rem 1rem;
    margin: 0 0.2rem;
    border-radius: 10px;
    transition: all 0.3s ease;
    position: relative;
}

.navbar-nav .nav-link:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

.navbar-nav .nav-link.active {
    background: rgba(255,255,255,0.2);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Navbar scroll effect */
.navbar-scrolled {
    padding: 0.4rem 0;
    background: linear-gradient(135deg, #152c4e 0%, #1e3c72 100%) !important;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* ========================================
   DROPDOWN STYLES
   ======================================== */
.dropdown-menu {
    border: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    animation: fadeInDown 0.3s ease;
    background: white;
    display: block;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.dropdown-menu.show {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-header {
    color: #6c757d;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.5rem 1.2rem;
    background: #f8f9fa;
}

.dropdown-item {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    position: relative;
}

.dropdown-item i {
    width: 1.5rem;
    margin-right: 0.5rem;
    color: #6c757d;
    transition: all 0.2s ease;
}

.dropdown-item:hover {
    background: var(--primary-gradient);
    color: white;
    transform: translateX(5px);
}

.dropdown-item:hover i {
    color: white;
}

.dropdown-divider {
    margin: 0.3rem 0;
}

/* ========================================
   TABLE STYLES
   ======================================== */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--border-radius-sm);
}

.table {
    margin-bottom: 0;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.table thead th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    border: none;
    padding: 1rem;
    font-size: 0.9rem;
}

.table tbody tr {
    transition: all 0.2s ease;
}

.table tbody tr:hover {
    background: rgba(67, 97, 238, 0.05);
    transform: scale(1.01);
}

.table td {
    padding: 0.8rem;
    vertical-align: middle;
    border-color: rgba(0,0,0,0.05);
}

/* ========================================
   BUTTON STYLES
   ======================================== */
.btn {
    border-radius: 10px;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
    margin: 2px;
    border-radius: 8px;
}

.btn-primary {
    background: var(--primary-gradient);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 97, 238, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #43aa8b, #4c9f70);
    border: none;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(76, 159, 112, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #f72585, #b5179e);
    border: none;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(247, 37, 133, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #f8961e, #f3722c);
    border: none;
    color: white;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(248, 150, 30, 0.4);
    color: white;
}

.btn-info {
    background: linear-gradient(135deg, #4cc9f0, #4361ee);
    border: none;
    color: white;
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(76, 201, 240, 0.4);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d, #495057);
    border: none;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(108, 117, 125, 0.4);
}

/* ========================================
   FORM STYLES
   ======================================== */
.form-control, .form-select {
    border-radius: 10px;
    border: 1px solid #e0e0e0;
    padding: 0.7rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(67, 97, 238, 0.25);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

/* ========================================
   ALERT STYLES
   ======================================== */
.alert {
    border: none;
    border-radius: var(--border-radius-sm);
    padding: 1rem 1.2rem;
    animation: slideIn 0.5s ease;
}

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

.alert-success {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    color: #155724;
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    color: #721c24;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd, #ffeeba);
    color: #856404;
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1, #bee5eb);
    color: #0c5460;
}

/* ========================================
   BADGE STYLES
   ======================================== */
.badge {
    padding: 0.4rem 0.8rem;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.75rem;
}

.badge-primary { background: var(--primary-gradient); }
.badge-success { background: linear-gradient(135deg, #43aa8b, #4c9f70); }
.badge-danger { background: linear-gradient(135deg, #f72585, #b5179e); }
.badge-warning { background: linear-gradient(135deg, #f8961e, #f3722c); }
.badge-info { background: linear-gradient(135deg, #4cc9f0, #4361ee); }

/* ========================================
   PROGRESS BAR STYLES
   ======================================== */
.progress {
    height: 10px;
    border-radius: 10px;
    background: #e9ecef;
    overflow: hidden;
}

.progress-bar {
    border-radius: 10px;
    transition: width 0.6s ease;
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2, #667eea);
}

/* ========================================
   ANIMATIONS
   ======================================== */
.content-wrapper {
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ========================================
   RESPONSIVE STYLES
   ======================================== */
@media (max-width: 1200px) {
    .container {
        max-width: 95%;
    }
}

@media (max-width: 991.98px) {
    .navbar {
        padding: 0.5rem 0;
    }
    
    .navbar-nav {
        padding: 1rem 0;
    }
    
    .navbar-nav .nav-link {
        padding: 0.8rem 1rem;
        margin: 0.2rem 0;
    }
    
    .dropdown-menu {
        border: none;
        box-shadow: none;
        background: transparent;
        padding-left: 1rem;
        animation: none;
    }
    
    .dropdown-item {
        color: rgba(255,255,255,0.8);
        padding: 0.6rem 1rem;
    }
    
    .dropdown-item i {
        color: rgba(255,255,255,0.6);
    }
    
    .dropdown-item:hover {
        background: rgba(255,255,255,0.1);
        transform: translateX(5px);
        color: white;
    }
    
    .dropdown-header {
        color: rgba(255,255,255,0.6);
        background: transparent;
        padding-left: 1rem;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    :root {
        --border-radius: 12px;
        --border-radius-sm: 8px;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .table thead th {
        font-size: 0.8rem;
        padding: 0.8rem;
    }
    
    .table td {
        font-size: 0.85rem;
        padding: 0.6rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 10px;
        padding-right: 10px;
    }
    
    .card-header {
        padding: 1rem;
    }
    
    .card-body {
        padding: 0.8rem;
    }
    
    .table-responsive {
        border-radius: 8px;
    }
    
    .btn-sm {
        padding: 0.3rem 0.6rem;
        font-size: 0.75rem;
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .navbar, 
    .btn, 
    .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    body {
        background: white;
        padding: 0;
        margin: 0;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
        margin: 0;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.shadow-hover {
    transition: all 0.3s ease;
}

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

.cursor-pointer {
    cursor: pointer;
}

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

.bg-gradient-primary {
    background: var(--primary-gradient);
}

.bg-gradient-secondary {
    background: var(--secondary-gradient);
}

/* Loading spinner */
.spinner-custom {
    width: 40px;
    height: 40px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}