:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --secondary: #6B7280;
    --bg-color: #F3F4F6;
    --surface: #FFFFFF;
    --text-main: #111827;
    --text-muted: #6B7280;
    --border: #E5E7EB;
    
    /* Status Colors */
    --status-blue: #DBEAFE;
    --status-blue-text: #1E40AF;
    --status-yellow: #FEF3C7;
    --status-yellow-text: #92400E;
    --status-green: #D1FAE5;
    --status-green-text: #065F46;
    --status-red: #FEE2E2;
    --status-red-text: #B91C1C;
    --status-gray: #F3F4F6;
    --status-gray-text: #374151;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Layout */
.app-container {
    display: flex;
    width: 100%;
    height: 100%;
}

.sidebar {
    width: 260px;
    background-color: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 1.75rem;
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-item:hover {
    background-color: var(--bg-color);
    color: var(--text-main);
}

.nav-item.active {
    background-color: var(--primary);
    color: white;
}

.user-profile {
    padding: 1rem;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.25rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.role-select {
    border: none;
    background: transparent;
    font-size: 0.75rem;
    color: var(--text-muted);
    outline: none;
    cursor: pointer;
    padding: 0;
    margin-top: 0.25rem;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.top-header {
    background-color: var(--surface);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.header-title p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

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

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
}

.search-bar i {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
}

.search-bar input {
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    outline: none;
    width: 250px;
    transition: all 0.2s;
}

.search-bar input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    width: 300px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-size: 0.875rem;
}

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

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

.btn-secondary {
    background-color: var(--surface);
    color: var(--text-main);
    border: 1px solid var(--border);
}

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

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
}

.w-100 { width: 100%; }
.mt-2 { margin-top: 0.5rem; }

.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.bg-blue { background-color: var(--status-blue); color: var(--status-blue-text); }
.bg-yellow { background-color: var(--status-yellow); color: var(--status-yellow-text); }
.bg-green { background-color: var(--status-green); color: var(--status-green-text); }
.bg-red { background-color: var(--status-red); color: var(--status-red-text); }

.stat-info h3 {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.stat-info h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Table */
.table-container {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background-color: #F9FAFB;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.data-table tbody tr:hover {
    background-color: #F9FAFB;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.status-badge.por-gestionar { background-color: var(--status-gray); color: var(--status-gray-text); }
.status-badge.entregado { background-color: var(--status-blue); color: var(--status-blue-text); }
.status-badge.en-revisión { background-color: var(--status-yellow); color: var(--status-yellow-text); }
.status-badge.entregado-en-caja { background-color: var(--status-green); color: var(--status-green-text); }
.status-badge.rechazado { background-color: var(--status-red); color: var(--status-red-text); }
.status-badge.observaciones { background-color: var(--status-yellow); color: var(--status-yellow-text); }

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal.modal-lg {
    max-width: 900px;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover { color: var(--text-main); }

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.modal-split {
    display: flex;
    gap: 2rem;
}

.modal-left, .modal-right {
    flex: 1;
}

.divider {
    height: 1px;
    background-color: var(--border);
    margin: 1.5rem 0;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

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

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    outline: none;
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* File Upload */
.file-upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background-color: var(--bg-color);
    margin-top: 1rem;
}

.file-upload-area:hover {
    border-color: var(--primary);
    background-color: rgba(79, 70, 229, 0.05);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 1.5rem;
}

.timeline-dot {
    position: absolute;
    left: -2rem;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--primary);
    border: 4px solid var(--surface);
}

.timeline-content {
    background-color: var(--bg-color);
    padding: 1rem;
    border-radius: var(--radius-md);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.timeline-header strong {
    color: var(--text-main);
}

.timeline-date {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.timeline-body {
    font-size: 0.875rem;
    color: var(--text-main);
}

.timeline-user {
    display: inline-block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .sidebar-header {
        padding: 1rem;
        display: flex;
        justify-content: center;
    }
    .sidebar-nav {
        flex-direction: row;
        flex-wrap: wrap;
        padding: 0.5rem;
        gap: 0.25rem;
        justify-content: center;
    }
    .nav-item {
        flex: 1;
        justify-content: center;
        min-width: 100px;
        padding: 0.5rem;
        font-size: 0.75rem;
    }
    .user-profile {
        padding: 0.5rem 1rem 1rem;
        justify-content: center;
    }
    .main-content {
        height: auto;
        overflow-y: visible;
    }
    .content-area {
        padding: 1rem;
    }
    .top-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
        gap: 1rem;
    }
    .header-actions {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    .search-bar {
        width: 100%;
    }
    .search-bar input, .search-bar input:focus {
        width: 100%;
    }
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .table-container {
        overflow-x: auto;
    }
    .data-table th, .data-table td {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
    
    .modal-split {
        flex-direction: column;
        gap: 1.5rem;
    }
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    .modal {
        width: 95%;
        margin: 1rem;
        max-height: 95vh;
    }
    .modal-body {
        padding: 1rem;
    }
    .timeline::before {
        left: 4px;
    }
    .timeline-dot {
        left: -1.7rem;
        width: 12px;
        height: 12px;
    }
    .bulk-actions {
        width: 100%;
        flex-direction: column;
        margin-right: 0 !important;
    }
}