/* Sistema de Planilla - Premium Dashboard Design */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Color Palette - Modern & Professional */
    --primary-color: #2563eb; /* Vibrant Blue */
    --primary-dark: #1e40af;
    --primary-light: #60a5fa;
    --secondary-color: #475569; /* Slate */
    --accent-color: #0ea5e9; /* Sky Blue */
    
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;

    --background-color: #f1f5f9; /* Light Gray Blue */
    --sidebar-bg: #1e293b; /* Dark Slate */
    --sidebar-text: #e2e8f0;
    --card-bg: #ffffff;
    
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    
    --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-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-main);
    line-height: 1.6;
    font-size: 16px;
}

/* Layout */
.dashboard-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: fixed;
    height: 100vh;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

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

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
}

.sidebar-header i {
    color: var(--primary-light);
}

.sidebar nav {
    flex: 1;
    padding: 1.5rem 1rem;
    overflow-y: auto;
}

.sidebar nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-weight: 500;
}

.sidebar nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
    transform: translateX(5px);
}

.sidebar nav a.active {
    background-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.3);
}

.sidebar nav a i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

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

.copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    width: calc(100% - 280px);
}

/* Top Bar */
.top-bar {
    background-color: var(--card-bg);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 90;
}

.top-bar h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-main);
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    display: none; /* Hidden on desktop */
}

.user-profile {
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
}

.user-profile:hover {
    transform: scale(1.1);
}

/* Main Area */
main {
    padding: 2rem;
    flex: 1;
}

.section {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}

.section.active {
    display: block;
}

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

/* Cards */
.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 0; /* Header handles padding */
    margin-bottom: 2rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

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

.card-header h2 {
    font-size: 1.25rem;
    color: var(--text-main);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-header h2 i {
    color: var(--primary-color);
}

.card form, .card .table-container, .card .filters-bar, .card .button-group, .card .resumen-stats, .card .meses-grid {
    padding: 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-main);
    font-size: 0.95rem;
}

.input-group {
    display: flex;
    align-items: stretch;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.input-group:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-group-prepend {
    background-color: #f8fafc;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    border-right: 1px solid var(--border-color);
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    font-size: 1rem;
    color: var(--text-main);
    background-color: #fff;
    outline: none;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -1rem;
}

.col-md-6, .col-md-3 {
    padding: 0 1rem;
}

.col-md-6 { width: 50%; }
.col-md-3 { width: 25%; }

/* Summary Grid */
.section-title {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

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

.summary-item {
    background-color: #f8fafc;
    padding: 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    text-align: center;
}

.summary-item label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.value-display {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.total-card {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin-top: 2rem;
    box-shadow: var(--shadow-md);
}

.total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    font-size: 1.1rem;
}

.total-row.highlight {
    font-size: 1.5rem;
    font-weight: 700;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 0.5rem;
    padding-top: 1rem;
}

/* Buttons */
.button-group {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

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

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

.btn-secondary {
    background-color: #fff;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover { background-color: #f8fafc; border-color: var(--text-muted); }

.btn-success {
    background-color: var(--success-color);
    color: white;
}
.btn-success:hover { background-color: #059669; }

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}
.btn-danger:hover { background-color: #dc2626; }

.btn-text {
    background: none;
    border: none;
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem 0;
    font-size: 0.9rem;
}
.btn-text:hover { text-decoration: underline; }

.import-button {
    width: 100%;
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
}
.import-button:hover { background-color: var(--primary-color); border-color: var(--primary-color); }

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table th {
    background-color: #f8fafc;
    color: var(--text-main);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.825rem;
    letter-spacing: 0.75px;
    padding: 1.125rem 1rem;
    text-align: left;
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 1.125rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 0.95rem;
    vertical-align: middle;
    transition: background-color 0.2s ease;
}

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

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

.table tr:hover td {
    background-color: rgba(37, 99, 235, 0.03);
}

.table tfoot td {
    background-color: #f8fafc;
    font-weight: 700;
    color: var(--text-main);
    border-top: 2px solid var(--border-color);
    padding: 1.25rem 1rem;
}

/* Action Buttons inside Tables */
.eliminar-registro, .cambiar-periodo {
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    margin: 0 4px;
}

.eliminar-registro {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.eliminar-registro:hover {
    background-color: var(--danger-color);
    color: white;
    transform: scale(1.1);
}

.cambiar-periodo {
    background-color: rgba(245, 94, 11, 0.1) !important;
    color: var(--warning-color) !important;
}

.cambiar-periodo:hover {
    background-color: var(--warning-color) !important;
    color: white !important;
    transform: scale(1.1);
}

/* Filters Bar */
.filters-bar {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    background-color: #f8fafc;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.filter-item {
    flex: 1;
    min-width: 150px;
}

.filter-item.flex-grow {
    flex: 2;
}

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

/* Stats Box */
.resumen-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-box {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stat-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.stat-info p {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Meses Grid */
.meses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.mes-item {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.mes-item:hover {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
    transform: translateY(-3px);
}

.mes-item i {
    font-size: 2rem;
    color: var(--primary-light);
    margin-bottom: 0.5rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    min-width: 350px;
    max-width: 500px;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease-out;
}

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

.close-button {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.close-button:hover { color: var(--danger-color); }

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
    }
    
    .btn-icon {
        display: block;
    }
}

@media (max-width: 768px) {
    .row { margin: 0; }
    .col-md-6, .col-md-3 { width: 100%; padding: 0; margin-bottom: 1rem; }
    
    .summary-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}