/* ============================================
   LAfricaMobile - Modern Professional UI
   ============================================ */

/* Variables */
:root {
    --primary-color: #0d6efd;
    --primary-dark: #0a58ca;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    
    --border-color: #dee2e6;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ============================================
   Base Styles
   ============================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

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

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

/* ============================================
   Sidebar
   ============================================ */

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    color: white;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform 0.3s ease;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.sidebar-logo {
    height: 40px;
    width: auto;
    margin-right: 0.75rem;
}

.sidebar-brand-text {
    color: white;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu-item {
    margin: 0.25rem 0;
}

.sidebar-menu-link {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar-menu-link:hover {
    background: rgba(255,255,255,0.1);
    color: white;
    border-left-color: #667eea;
    padding-left: 1.75rem;
}

.sidebar-menu-link i {
    width: 24px;
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.sidebar-menu-link.active {
    background: rgba(102, 126, 234, 0.2);
    color: white;
    border-left-color: #667eea;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-user {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.sidebar-user-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.2);
    margin-right: 0.75rem;
    object-fit: cover;
}

.sidebar-user-info {
    flex: 1;
}

.sidebar-user-name {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.sidebar-user-role {
    display: block;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.6);
}

.sidebar-user-actions {
    display: flex;
    gap: 0.5rem;
}

.sidebar-user-action {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.sidebar-user-action:hover {
    background: rgba(255,255,255,0.2);
    color: white;
    transform: translateY(-2px);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

.sidebar-toggle-mobile {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.main-wrapper {
    margin-left: 280px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s ease;
}

@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-wrapper {
        margin-left: 0;
    }
}

/* ============================================
   Header & Navigation
   ============================================ */

.app-header {
    background: white;
    box-shadow: var(--shadow-sm);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    margin-bottom: 0;
}

.app-header .navbar {
    padding: 1rem 0;
}

.header-title h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-user {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.header-user:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.header-user-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    margin-right: 0.75rem;
    object-fit: cover;
}

.app-header .dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-sm);
    margin-top: 0.5rem;
    padding: 0.5rem 0;
}

.app-header .dropdown-item {
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    font-weight: 500;
}

.app-header .dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
    padding-left: 2rem;
}

/* ============================================
   Main Content
   ============================================ */

.app-main {
    flex: 1;
    padding: 0;
    background: var(--bg-secondary);
}

.app-main .container-fluid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Page Header */
.page-header {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.page-title i {
    color: var(--primary-color);
}

/* ============================================
   Cards
   ============================================ */

.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #146c43 100%);
    color: white;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.1rem;
}

/* ============================================
   Tables
   ============================================ */

.table-container {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--bg-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
    padding: 1rem 1.5rem;
}

.table tbody td {
    padding: 1rem 1.5rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: var(--bg-secondary);
    transform: translateX(4px);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ============================================
   Forms
   ============================================ */

.form-control,
.form-select {
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: var(--transition);
    font-size: 1rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
    outline: none;
}

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

.input-group-text {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-right: none;
    border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}

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

/* ============================================
   Badges
   ============================================ */

.badge {
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
}

/* ============================================
   Footer
   ============================================ */

.app-footer {
    background: white;
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 0;
    margin-top: auto;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
}

.app-footer p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   Toast Notifications
   ============================================ */

.toast {
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    border: none;
}

.toast-header {
    border-bottom: none;
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.toast-body {
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
}

/* ============================================
   Loading States
   ============================================ */

.loading-overlay {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.spinner-border-custom {
    border-color: white;
    border-right-color: transparent;
}

/* ============================================
   Utilities
   ============================================ */

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

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

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

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .app-main .container-fluid {
        padding: 1rem;
    }
    
    .page-header {
        padding: 1.5rem;
    }
    
    .page-title {
        font-size: 1.75rem;
    }
    
    .table-responsive {
        font-size: 0.9rem;
    }
    
    .stats-card h3 {
        font-size: 1.75rem;
    }
    
    .upload-area {
        padding: 2rem 1rem;
    }
}

@media (max-width: 576px) {
    .app-header .navbar-brand {
        font-size: 1.25rem;
    }
    
    .app-header .logo-img {
        height: 40px;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

/* ============================================
   Animations
   ============================================ */

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

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

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

.slide-in {
    animation: slideIn 0.5s ease-out;
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .app-header,
    .app-footer,
    .btn,
    .upload-area {
        display: none !important;
    }
    
    .app-main {
        padding: 0;
    }
    
    .table {
        font-size: 0.9rem;
    }
}