/* Reset y estilos globales */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --light-bg: #f8fafc;
    --dark-text: #1e293b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --sidebar-width: 250px;
    --navbar-height: 60px;
    --transition-speed: 0.3s;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    min-height: 44px; /* Mejor usabilidad en móvil */
    touch-action: manipulation; /* Mejor respuesta al tacto */
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5568d3 0%, #63408a 100%);
}

.btn-secondary {
    background: #64748b;
    color: white;
}

.btn-secondary:hover {
    background: #475569;
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

.btn-warning:hover {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
}

.btn-info {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
}

.btn-info:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

/* Formularios */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-text);
    font-size: 14px;
    letter-spacing: 0.3px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: white;
    color: var(--dark-text);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    background: #fafbfc;
}

.form-control:disabled {
    background-color: #f1f5f9;
    cursor: not-allowed;
    color: #94a3b8;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: white;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    background: #fafbfc;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.form-row .form-group {
    margin-bottom: 0;
}

.required {
    color: #ef4444;
    font-weight: bold;
    margin-left: 2px;
}

/* Select mejorado */
select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23667eea' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px;
    padding-right: 40px;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

select.form-control:focus {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%232563eb' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

/* Textarea */
textarea.form-control {
    resize: vertical;
    min-height: 100px;
    line-height: 1.6;
    font-family: inherit;
}

/* Input con icono */
.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group .form-control {
    padding-left: 45px;
}

.input-icon {
    position: absolute;
    left: 15px;
    font-size: 18px;
    color: #94a3b8;
    pointer-events: none;
}

.input-group .form-control:focus ~ .input-icon {
    color: var(--primary-color);
}

/* Alertas */
.alert {
    padding: 16px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    animation: slideInDown 0.4s ease;
}

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

.alert span:first-child {
    font-size: 22px;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border-left-color: #10b981;
}

.alert-error,
.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border-left-color: #ef4444;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border-left-color: #f59e0b;
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border-left-color: #3b82f6;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid #fcd34d;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.card-header {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--dark-text);
}

/* Tabla */
.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--light-bg);
    font-weight: 600;
    color: var(--dark-text);
}

.table tr:hover {
    background-color: var(--light-bg);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

/* Utilidades */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.items-center {
    align-items: center;
}

.gap-10 {
    gap: 10px;
}

/* ===================================
   CARDS Y TABLAS
   =================================== */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 25px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.card-header {
    padding: 20px 25px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 2px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    color: var(--dark-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 25px;
}

/* Tablas mejoradas */
.table-responsive {
    overflow-x: auto;
    margin: -1px;
}

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

.table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.table thead th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: none;
}

.table thead th:first-child {
    border-radius: 8px 0 0 0;
}

.table thead th:last-child {
    border-radius: 0 8px 0 0;
}

.table tbody tr {
    transition: all 0.2s ease;
    border-bottom: 1px solid #e2e8f0;
}

.table tbody tr:hover {
    background-color: #f8fafc;
    transform: scale(1.01);
}

.table tbody td {
    padding: 16px 20px;
    vertical-align: middle;
    font-size: 14px;
}

.table tfoot {
    background-color: #f8fafc;
    font-weight: 600;
}

.table tfoot td {
    padding: 16px 20px;
    border-top: 2px solid #e2e8f0;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
    border: 1px solid #10b981;
}

.badge-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
    border: 1px solid #ef4444;
}

.badge-warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
    border: 1px solid #f59e0b;
}

.badge-info {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
    border: 1px solid #3b82f6;
}

.badge-secondary {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    color: #475569;
    border: 1px solid #64748b;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #94a3b8;
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #64748b;
}

.empty-state p {
    font-size: 14px;
    margin-bottom: 20px;
}

/* Page header mejorado */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
}

.page-header h1 {
    font-size: 28px;
    margin: 0;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.page-header p {
    margin: 5px 0 0 0;
    opacity: 0.9;
    font-size: 15px;
}

.header-actions {
    display: flex;
    gap: 12px;
}

/* Form actions */
.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding-top: 20px;
    border-top: 2px solid #e2e8f0;
    margin-top: 30px;
}

/* ===================================
   MODALES MEJORADOS
   =================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
    animation: slideIn 0.3s ease;
}

.modal-header {
    padding: 24px 28px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: none;
}

.modal-header h3 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 28px;
    font-weight: 300;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.modal-body {
    padding: 28px;
    max-height: calc(90vh - 180px);
    overflow-y: auto;
}

.modal-body p {
    margin-bottom: 16px;
    line-height: 1.6;
    color: #475569;
}

.modal-body .text-warning {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 12px 16px;
    border-radius: 6px;
    margin-top: 16px;
}

.modal-body .text-warning strong {
    color: #92400e;
}

.modal-footer {
    padding: 20px 28px;
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.modal-footer .btn {
    min-width: 100px;
}

/* Modal para información */
.modal-content.modal-info .modal-header {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

/* Modal para éxito */
.modal-content.modal-success .modal-header {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

/* Modal para advertencia */
.modal-content.modal-warning .modal-header {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

/* Modal para peligro */
.modal-content.modal-danger .modal-header {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

/* Modal grande */
.modal-content.modal-lg {
    max-width: 800px;
}

/* Modal extra grande */
.modal-content.modal-xl {
    max-width: 1140px;
}

/* Responsivo general */
@media (max-width: 992px) {
    .container {
        padding: 0 15px;
    }
    
    .btn {
        padding: 10px 20px;
    }
}

@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        max-width: none;
        margin: 20px;
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .modal-footer {
        padding: 16px 20px;
        flex-direction: column;
    }
    
    .modal-footer .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 16px; /* Mejor legibilidad en móvil */
        min-height: 48px;
    }
    
    .form-control,
    .form-select {
        font-size: 16px; /* Evitar zoom en iOS */
        min-height: 44px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 10px;
    }
    
    .card-header h3 {
        font-size: 16px;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .btn:last-child {
        margin-bottom: 0;
    }
}