/* ========================================
   GLOBAL STYLES & VARIABLES
   ======================================== */

:root {
    /* Primary Colors */
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    
    /* Secondary Colors */
    --secondary-color: #10B981;
    --secondary-dark: #059669;
    
    /* Status Colors */
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    --info-color: #3B82F6;
    
    /* Neutral Colors */
    --dark: #1F2937;
    --dark-light: #374151;
    --gray: #6B7280;
    --gray-light: #9CA3AF;
    --border-color: #E5E7EB;
    --bg-light: #F9FAFB;
    --white: #FFFFFF;
    
    /* Text Colors */
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--primary-dark);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.5;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn i {
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--secondary-dark);
}

.btn-success {
    background-color: var(--success-color);
    color: var(--white);
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--white);
}

.btn-warning {
    background-color: var(--warning-color);
    color: var(--white);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--bg-light);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* ========================================
   FORM ELEMENTS
   ======================================== */

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.form-control:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.input-with-icon input,
.input-with-icon select {
    padding-left: 2.5rem;
}

/* ========================================
   CARDS
   ======================================== */

.card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
}

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

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-light);
}

/* ========================================
   ALERTS
   ======================================== */

.alert {
    padding: 0.875rem 1.25rem;
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert i {
    font-size: 1.25rem;
}

.alert-success {
    background-color: #D1FAE5;
    border-color: #10B981;
    color: #065F46;
}

.alert-danger {
    background-color: #FEE2E2;
    border-color: #EF4444;
    color: #991B1B;
}

.alert-warning {
    background-color: #FEF3C7;
    border-color: #F59E0B;
    color: #92400E;
}

.alert-info {
    background-color: #DBEAFE;
    border-color: #3B82F6;
    color: #1E40AF;
}

/* ========================================
   BADGES
   ======================================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.badge-primary {
    background-color: #EEF2FF;
    color: var(--primary-color);
}

.badge-success {
    background-color: #D1FAE5;
    color: #065F46;
}

.badge-danger {
    background-color: #FEE2E2;
    color: #991B1B;
}

.badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-info {
    background-color: #DBEAFE;
    color: #1E40AF;
}

.badge-gray {
    background-color: #F3F4F6;
    color: #4B5563;
}

/* ========================================
   LOADING & SPINNER
   ======================================== */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    display: none; /* Hidden by default */
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-overlay.active {
    display: flex; /* Show when active class is added */
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========================================
   UTILITIES
   ======================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }
.text-warning { color: var(--warning-color); }
.text-muted { color: var(--text-muted); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }

.fw-bold { font-weight: 600; }
.fw-normal { font-weight: 400; }

/* ========================================
   PROGRESS BAR & UPLOAD
   ======================================== */

.progress-bar {
    width: 100%;
    height: 20px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    width: 0%;
    transition: width 0.3s ease;
    animation: progressAnimation 2s ease-in-out infinite;
}

@keyframes progressAnimation {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

.form-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
}

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.alert i {
    margin-top: 2px;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.alert ul {
    margin: 0;
    padding: 0;
    list-style-position: inside;
}

.alert li {
    margin: var(--spacing-xs) 0;
}

.form-text {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

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

.btn-link i {
    font-size: 1rem;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }
    
    .card-body {
        padding: 1rem;
    }
}

/* ========================================
   DETAILS MODAL & VIEWS
   ======================================== */

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.detail-section {
    background: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.detail-section h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.detail-section h3 i {
    color: var(--primary-color);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.detail-value {
    font-weight: 400;
    color: var(--text-primary);
    text-align: right;
}

/* ========================================
   USER AVATAR
   ======================================== */

.user-avatar-sm {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.user-cell {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ========================================
   PROGRESS BAR VARIANTS
   ======================================== */

.progress-fill {
    height: 100%;
    border-radius: var(--radius-lg);
    transition: width 0.3s ease;
    position: relative;
}

.progress-success {
    background: linear-gradient(90deg, #22c55e, #16a34a);
}

.progress-warning {
    background: linear-gradient(90deg, #f59e0b, #d97706);
}

.progress-danger {
    background: linear-gradient(90deg, #ef4444, #dc2626);
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    z-index: 1;
}

/* ========================================
   MODAL FOOTER
   ======================================== */

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-lg);
}

/* ========================================
   ACTION BUTTONS
   ======================================== */

.action-buttons {
    display: flex;
    gap: var(--spacing-xs);
    justify-content: center;
}

.btn-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-icon:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}