/* ============================================================
   VARIABLES & RESET
   ============================================================ */
:root {
    --primary-color: #2c3e50;
    --sidebar-width: 260px;
    --header-height: 70px;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #3498db;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    overflow-x: hidden;
}

/* ============================================================
   LAYOUT PRINCIPAL
   ============================================================ */
.wrapper {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
    width: var(--sidebar-width);
    background: var(--primary-color);
    color: white;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    background: var(--primary-color);
    z-index: 10;
}

.sidebar-header h3 {
    color: white;
    font-size: 1.2rem;
    margin: 0;
}

.sidebar-nav {
    padding: 1rem 0;
}

.sidebar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s;
    border-left: 3px solid transparent;
    text-decoration: none;
}

.sidebar-nav .nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
    border-left-color: var(--info-color);
}

.sidebar-nav .nav-link.active {
    color: white;
    background: rgba(255, 255, 255, 0.15);
    border-left-color: var(--info-color);
}

.sidebar-nav .nav-link i {
    font-size: 1.2rem;
}

.nav-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 1rem 0;
}

.nav-section-title {
    padding: 0.5rem 1.5rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main-content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

.top-header {
    background: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 999;
    width: 100%;
}

.content-area {
    flex: 1;
    padding: 2rem 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    background: white;
    padding: 1rem 0;
    border-top: 1px solid #dee2e6;
    margin-top: auto;
}

/* ============================================================
   CARDS & STATS
   ============================================================ */
.stat-card {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.stat-icon {
    font-size: 2.5rem;
    opacity: 0.3;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.9rem;
    color: #6c757d;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================================
   TABLES
   ============================================================ */
.table-container {
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
    overflow: hidden;
}

.table-header {
    padding: 1.25rem;
    border-bottom: 1px solid #dee2e6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    background: #f8f9fa;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    border-bottom: 2px solid #dee2e6;
    padding: 1rem;
}

.table tbody tr {
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

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

.table-actions .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
}

/* ============================================================
   BADGES
   ============================================================ */
.badge {
    padding: 0.35rem 0.65rem;
    font-weight: 500;
}

.badge-ecart-ok {
    background-color: var(--success-color);
}

.badge-ecart-warning {
    background-color: var(--warning-color);
}

.badge-ecart-danger {
    background-color: var(--danger-color);
}

/* ============================================================
   FORMS
   ============================================================ */
.form-section {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
    margin-bottom: 1.5rem;
}

.form-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.required-field::after {
    content: " *";
    color: var(--danger-color);
}

/* ============================================================
   SEARCH & FILTERS
   ============================================================ */
.search-box {
    position: relative;
}

.search-box input {
    padding-left: 2.5rem;
}

.search-box i {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
}

/* ============================================================
   CHARTS
   ============================================================ */
.chart-container {
    position: relative;
    height: 300px;
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

/* ============================================================
   ALERTS
   ============================================================ */
.alert {
    border-radius: 0.5rem;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

.alert-list {
    background: white;
    border-radius: 0.5rem;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

.alert-item {
    padding: 0.75rem;
    border-left: 3px solid;
    margin-bottom: 0.5rem;
    background: #f8f9fa;
    border-radius: 0.25rem;
}

.alert-item:last-child {
    margin-bottom: 0;
}

.alert-item.warning {
    border-left-color: var(--warning-color);
}

.alert-item.danger {
    border-left-color: var(--danger-color);
}

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
    margin: 1.5rem 0;
}

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

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: #1a252f;
    border-color: #1a252f;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* ============================================================
   MODALS
   ============================================================ */
.modal-header {
    background-color: var(--primary-color);
    color: white;
}

.modal-header .btn-close {
    filter: invert(1);
}

/* ============================================================
   TOOLTIPS
   ============================================================ */
[data-bs-toggle="tooltip"] {
    cursor: help;
}

/* ============================================================
   LOADING SPINNER
   ============================================================ */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-overlay.show {
    display: flex;
}

.spinner-custom {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
}

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

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
    }
    
    .mobile-menu-toggle {
        display: block !important;
        position: fixed;
        bottom: 1rem;
        right: 1rem;
        z-index: 1001;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 50%;
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
        box-shadow: 0 4px 12px rgba(0,0,0,0.3);
        cursor: pointer;
    }
    
    .mobile-menu-toggle:hover {
        background: #1a252f;
    }
}

@media (min-width: 992px) {
    .mobile-menu-toggle {
        display: none !important;
    }
    
    .sidebar {
        transform: translateX(0) !important;
    }
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.text-primary-custom {
    color: var(--primary-color) !important;
}

.bg-primary-custom {
    background-color: var(--primary-color) !important;
}

.fw-600 {
    font-weight: 600;
}

.cursor-pointer {
    cursor: pointer;
}

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