/* ============================================================
   Estilos - Sistema de Gestión de Impuestos
   ============================================================ */

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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-gray: #f3f4f6;
    --border-color: #d1d5db;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --navbar-height: auto;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-gray);
    color: var(--text-dark);
    line-height: 1.6;
    padding-top: 100px;
}

/* ============================================================
   NAVBAR
   ============================================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 1000;
}

.nav-top-bar {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-menu-bar {
    border-top: 1px solid #eee;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
}

.nav-logo {
    font-size: 1.25rem;
}

.nav-menu {
    display: flex;
    flex-direction: row;
    list-style: none;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-user-name {
    font-size: 0.875rem;
    color: var(--text-gray);
    font-weight: 500;
}

.nav-logout {
    padding: 0.4rem 0.75rem;
    background: rgba(239, 68, 68, 0.1);
    color: #991b1b;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    transition: background 0.2s;
}

.nav-logout:hover {
    background: rgba(239, 68, 68, 0.2);
}

.nav-item {
    position: relative;
    margin: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.75rem;
    text-decoration: none;
    color: var(--text-gray);
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--bg-gray);
    color: var(--primary-color);
}

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

.nav-icon {
    font-size: 1rem;
}

/* ============================================================
   LAYOUT PRINCIPAL
   ============================================================ */

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

.two-column-layout {
    display: -ms-grid;
    display: grid;
    -ms-grid-columns: 600px 2rem 1fr;
    grid-template-columns: 600px 1fr;
    gap: 2rem;
    column-gap: 2rem;
    align-items: start;
}

/* Fix para Firefox */
@-moz-document url-prefix() {
    .two-column-layout {
        display: grid;
        grid-template-columns: 600px 1fr;
    }
}

.pdf-preview-column {
    position: sticky;
    top: calc(var(--navbar-height) + 2rem);
    max-height: calc(100vh - var(--navbar-height) - 4rem);
   /* overflow-y: auto;*/
}

.form-column {
    min-height: 100vh;
  
}

/* ============================================================
   CARDS
   ============================================================ */

.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

.card-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bg-gray);
}

.card-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-dark);
}

.card-header p {
    color: var(--text-gray);
    margin-top: 0.5rem;
}

/* ============================================================
   PDF PREVIEW
   ============================================================ */

input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
}

.pdf-upload-zone {
    border: 3px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--bg-gray);
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.pdf-upload-zone:hover {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.pdf-upload-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.upload-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.upload-hint {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.pdf-preview-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
   
}

.pdf-preview-header {
    padding: 1rem;
    background: var(--bg-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.pdf-file-name {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.875rem;
}

.pdf-remove-btn {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.2s;
}

.pdf-remove-btn:hover {
    background: #dc2626;
}

.pdf-preview-wrapper {
    width: 100%;
    height: 600px;
    background: #f8f8f8;
}

.pdf-preview-iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.img-preview {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: 4px;
}

/* ============================================================
   FORMULARIO
   ============================================================ */

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.required {
    color: var(--danger-color);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control:disabled {
    background-color: var(--bg-gray);
    cursor: not-allowed;
}

select.form-control {
    cursor: pointer;
}

input[type="date"] {
    cursor: pointer;
    position: relative;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    height: auto;
    opacity: 0;
    cursor: pointer;
}


textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-help {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-top: 0.25rem;
}

/* ============================================================
   BOTONES
   ============================================================ */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn-primary:disabled {
    background-color: var(--border-color);
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background-color: var(--bg-gray);
    color: var(--text-dark);
}

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

.btn-block {
    width: 100%;
}

/* ============================================================
   ALERTAS
   ============================================================ */

.alert {
    padding: 1rem 1.25rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success-color);
    color: #065f46;
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger-color);
    color: #991b1b;
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning-color);
    color: #92400e;
}

.alert-icon {
    font-size: 1.5rem;
}

/* ============================================================
   LOADER
   ============================================================ */

.loader {
    border: 3px solid var(--bg-gray);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================================
   UTILIDADES
   ============================================================ */

.hidden {
    display: none !important;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
    .two-column-layout {
        grid-template-columns: 1fr;
    }
    
    .pdf-preview-column {
        position: relative;
        top: 0;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-title {
        display: none;
    }
    
    .nav-menu {
        gap: 0.25rem;
    }
    
    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .nav-link span:not(.nav-icon) {
        display: none;
    }
}

/* ============================================================
   INFO BOX - Datos autocompletados (carga por código)
   ============================================================ */

.info-box {
    background: rgba(37, 99, 235, 0.05);
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.info-box-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.info-box-grid small {
    color: var(--text-gray);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-box-value {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
}

/* ============================================================
   BADGES - Vigente / Vencido
   ============================================================ */

.badge-vigente {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(16, 185, 129, 0.1);
    color: #065f46;
}

.badge-vencido {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(156, 163, 175, 0.2);
    color: #6b7280;
}

.fila-vencida {
    opacity: 0.6;
}

.opcion-vencida {
    color: #9ca3af;
}

/* ============================================================
   TABLA ABM - Botones de acción
   ============================================================ */

.btn-accion {
    padding: 0.3rem 0.6rem;
    border: none;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-editar {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.btn-editar:hover {
    background: rgba(37, 99, 235, 0.2);
}

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

.btn-eliminar:hover {
    background: rgba(239, 68, 68, 0.2);
}