:root {
    /* Modo Claro */
    --bg-color: #f4f7fa;
    --surface-color: #ffffff;
    --text-primary: #0d2138;
    --text-secondary: #546e7a;
    --accent: #27b1bc;
    --accent-hover: #1f8e97;
    --border-color: #e0e6ed;
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

[data-theme='dark'] {
    /* Modo Oscuro */
    --bg-color: #0d2138;
    --surface-color: #1c3a59;
    --text-primary: #ffffff;
    --text-secondary: #b0bec5;
    --accent: #27b1bc;
    --accent-hover: #35d0dd;
    --border-color: #2c4e72;
    --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* Box-sizing y fuente globales. Sin transition: all, eso lo aplicamos
   selectivamente abajo (mejor performance, comportamiento predecible). */
* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
}

/* Transiciones aplicadas solo a elementos interactivos */
.btn-primary,
.btn-secondary,
.btn-toggle,
.filtro-chip,
.opcion-asunto,
a {
    transition: background 0.2s ease,
                color 0.2s ease,
                border-color 0.2s ease,
                transform 0.15s ease,
                opacity 0.2s ease;
}

/* ============================================================
   COMPONENTES COMUNES
   ============================================================ */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.card {
    background: var(--surface-color);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color);
}

.input-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

input, select, textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-primary);
    font-size: 1rem;
}

input:focus {
    outline: 2px solid var(--accent);
    border-color: transparent;
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
}

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

.field-error {
    color: #c62828;
    font-size: 0.8rem;
    margin-top: 4px;
    display: block;
}

/* ============================================================
   DASHBOARD / LAYOUT GENERAL
   ============================================================ */
.main-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
}

.content {
    padding: 2rem 3rem;
    overflow-y: auto;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.dashboard-header h1 {
    margin: 0;
    font-size: 1.75rem;
}

/* ============================================================
   DASHBOARD — BÚSQUEDA, PREVIEW, ENVÍO
   ============================================================ */
.search-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

.search-row > .search-field {
    flex-grow: 1;
}

.btn-search {
    width: 200px;
    flex-shrink: 0;
}

.add-row {
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

.add-row > input {
    flex-grow: 1;
}

.btn-add {
    width: 140px;
    flex-shrink: 0;
}

.send-row {
    margin-top: 2rem;
    display: flex;
    justify-content: flex-end;
}

.btn-send {
    width: 300px;
    height: 50px;
    font-size: 1.1rem;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--accent);
    padding-bottom: 10px;
    gap: 1rem;
    flex-wrap: wrap;
}

.preview-header h3 {
    margin: 0;
}

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

.data-item {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.data-item label {
    font-size: 0.75rem;
}

.data-item span {
    font-weight: 500;
}

/* Badges de canal (Verde / Naranja / Rojo) */
.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
}

.verde   { background: #e8f5e9; color: #2e7d32; }
.naranja { background: #fff3e0; color: #ef6c00; }
.rojo    { background: #ffebee; color: #c62828; }

/* ============================================================
   ASUNTO — opciones (Liberación / NO Liberación)
   ============================================================ */
.opciones-asunto {
    margin-top: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.opcion-asunto {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin: 0;
}

.opcion-asunto:hover {
    background: var(--bg-color);
}

.opcion-asunto input[type="radio"] {
    width: auto;
    cursor: pointer;
    accent-color: var(--accent);
}

.separador-asunto {
    height: 1px;
    background: var(--border-color);
}

/* ============================================================
   MI EQUIPO — Tabla de operadores
   ============================================================ */
.table-wrapper {
    overflow-x: auto;
}

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

.operadores-table th {
    text-align: left;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 12px 8px;
    border-bottom: 2px solid var(--border-color);
}

.operadores-table td {
    padding: 14px 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.operadores-table tr.row-inactive td {
    opacity: 0.5;
}

.estado-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.estado-badge.activo    { background: #e8f5e9; color: #2e7d32; }
.estado-badge.inactivo  { background: #ffebee; color: #c62828; }

.btn-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
}

.btn-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-toggle:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

/* ============================================================
   MODAL — Agregar Operador
   ============================================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: 200;
}

.modal-backdrop.show {
    opacity: 1;
}

.modal-container {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 201;
    padding: 20px;
    pointer-events: none;
}

.modal-card {
    background: var(--surface-color);
    border-radius: 16px;
    padding: 2rem;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    transform: scale(0);
    opacity: 0;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.2s ease;
    max-height: 90vh;
    overflow-y: auto;
    pointer-events: auto;
}

.modal-container.show .modal-card {
    transform: scale(1);
    opacity: 1;
}

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

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.8rem;
    line-height: 1;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: auto;
}

.modal-close:hover {
    color: #c62828;
}

.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.modal-footer .btn-primary,
.modal-footer .btn-secondary {
    width: auto;
    min-width: 120px;
}

/* ============================================================
   HISTORIAL DE ENVÍOS
   ============================================================ */
.filtro-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filtro-chip {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
}

.filtro-chip:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.filtro-chip.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.filtro-chip:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.historial-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.historial-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 14px 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.historial-card.fallido {
    border-left: 4px solid #c62828;
}

.card-row {
    display: flex;
    gap: 10px;
    align-items: center;
    font-size: 0.9rem;
}

.card-row-top {
    gap: 12px;
    flex-wrap: wrap;
    padding-bottom: 8px;
    border-bottom: 1px dashed var(--border-color);
    margin-bottom: 4px;
}

.fecha-envio {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.badge-tipo {
    padding: 3px 12px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.badge-tipo.lib   { background: #e8f5e9; color: #2e7d32; }
.badge-tipo.nolib { background: #fff3e0; color: #ef6c00; }

.badge-estado {
    padding: 3px 12px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-left: auto;
}

.badge-estado.exitoso { background: #e8f5e9; color: #2e7d32; }
.badge-estado.error   { background: #ffebee; color: #c62828; }

.campo-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    min-width: 95px;
}

.campo-valor {
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-word;
}

/* ============================================================
   HAMBURGUESA + DRAWER (oculto en desktop)
   ============================================================ */
.btn-hamburger {
    display: none;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    width: 44px;
    height: 44px;
    cursor: pointer;
    padding: 0;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    flex-shrink: 0;
}

.btn-hamburger:hover {
    border-color: var(--accent);
}

.drawer-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
    -webkit-tap-highlight-color: transparent;
}

/* ============================================================
   CONTENEDORES Y PRECINTOS (Dashboard)
   ============================================================ */
.contenedores-section {
    margin-top: 2rem;
    padding: 1.25rem;
    background: var(--bg-color);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.contenedores-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 10px;
}

    .contenedores-header h4 {
        margin: 0;
        color: var(--accent);
        font-size: 0.85rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        font-weight: 700;
    }

.btn-add-contenedor {
    width: auto;
    padding: 8px 16px;
    font-size: 0.85rem;
}

.contenedores-vacio {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
    text-align: center;
    padding: 1.5rem 0;
}

.contenedor-row {
    display: grid;
    grid-template-columns: 40px 1fr 1.5fr 36px;
    gap: 12px;
    align-items: end;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

    .contenedor-row:last-child {
        border-bottom: none;
    }

.contenedor-num {
    color: var(--accent);
    font-weight: 700;
    font-size: 0.95rem;
    text-align: center;
    padding-bottom: 12px;
}

.contenedor-field {
    display: flex;
    flex-direction: column;
}

    .contenedor-field label {
        font-size: 0.7rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 4px;
    }

.precintos-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
}

.btn-eliminar-contenedor {
    width: 36px;
    height: 42px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 8px;
    font-size: 1.3rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

    .btn-eliminar-contenedor:hover:not(:disabled) {
        border-color: #c62828;
        color: #c62828;
    }

    .btn-eliminar-contenedor:disabled {
        cursor: not-allowed;
        opacity: 0.5;
    }

/* ============================================================
   RESPONSIVE — Tablet y Mobile (≤ 900px)
   ============================================================ */
@media (max-width: 900px) {

    /* --- Login / Register --- */
    .auth-container {
        padding: 16px;
        align-items: flex-start;
        padding-top: 40px;
    }

    .card {
        padding: 2rem 1.5rem;
        max-width: 100%;
    }

    /* --- Layout --- */
    .main-layout {
        grid-template-columns: 1fr;
    }

    .content {
        padding: 1.5rem 1rem;
    }

    /* Sidebar pasa a drawer fijo, oculto por defecto */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        box-shadow: 2px 0 16px rgba(0, 0, 0, 0.15);
        overflow-y: auto;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .drawer-backdrop.open {
        display: block;
    }

    .btn-hamburger {
        display: inline-flex;
    }

    /* --- Dashboard header --- */
    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
        margin-bottom: 1.5rem;
    }

    .dashboard-header-top {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .dashboard-header h1 {
        font-size: 1.4rem;
    }

    /* --- Búsqueda apila --- */
    .search-row {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .btn-search {
        width: 100%;
    }

    /* --- Preview --- */
    .preview-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 1rem;
    }

    /* --- Destinatarios --- */
    .add-row {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-add {
        width: 100%;
    }

    /* --- Envío --- */
    .send-row {
        justify-content: stretch;
    }

    .btn-send {
        width: 100%;
    }

    /* --- Mi Equipo: tabla --- */
    .operadores-table th,
    .operadores-table td {
        padding: 10px 6px;
        font-size: 0.85rem;
    }

    /* Contenedores: layout responsive */
    .contenedor-row {
        grid-template-columns: 1fr 36px;
        grid-template-areas:
            "num    delete"
            "field1 field1"
            "field2 field2";
        gap: 8px;
    }

    .contenedor-num {
        grid-area: num;
        text-align: left;
        padding-bottom: 0;
    }

    .contenedor-row > .contenedor-field:nth-of-type(1) {
        grid-area: field1;
    }

    .contenedor-row > .contenedor-field:nth-of-type(2) {
        grid-area: field2;
    }

    .btn-eliminar-contenedor {
        grid-area: delete;
    }

    .contenedores-header {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-add-contenedor {
        width: 100%;
    }
}

/* ============================================================
   RESPONSIVE — Mobile chico (≤ 600px)
   Ajustes específicos para historial
   ============================================================ */
@media (max-width: 600px) {
    .historial-card {
        padding: 12px 14px;
        gap: 6px;
    }

    .card-row-top {
        gap: 8px;
        flex-wrap: wrap;
        align-items: flex-start;
    }

    /* Fecha ocupa toda la línea, badges van debajo */
    .fecha-envio {
        font-size: 0.85rem;
        flex-basis: 100%;
    }

    .badge-tipo,
    .badge-estado {
        font-size: 0.68rem;
        padding: 2px 10px;
        margin-left: 0;
    }

    /* Label y valor se apilan en mobile */
    .card-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }

    .campo-label {
        font-size: 0.72rem;
        min-width: 0;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    .campo-valor {
        font-size: 0.9rem;
        word-break: break-all;
    }
}

/* ============================================================
   RESPONSIVE — Mobile chico (≤ 480px) — ajustes finos
   ============================================================ */
@media (max-width: 480px) {
    .card {
        padding: 1.5rem 1.25rem;
        border-radius: 12px;
    }

    .content {
        padding: 1rem 0.75rem;
    }

    .preview-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .dashboard-header h1 {
        font-size: 1.2rem;
    }

    /* Inputs un poco más chicos */
    input, select, textarea {
        padding: 10px 12px;
        font-size: 0.95rem;
    }

    /* Evita zoom en iOS Safari (necesita font-size >= 16px) */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    textarea,
    select {
        font-size: 16px;
    }

    /* --- Modal en mobile chico --- */
    .modal-card {
        padding: 1.5rem;
    }

    .modal-footer {
        flex-direction: column-reverse;
    }

    .modal-footer .btn-primary,
    .modal-footer .btn-secondary {
        width: 100%;
    }

    /* --- Mi Equipo: tabla con scroll lateral, fuente más chica --- */
    .operadores-table th,
    .operadores-table td {
        padding: 8px 5px;
        font-size: 0.8rem;
    }

    .estado-badge,
    .btn-toggle {
        font-size: 0.7rem;
        padding: 4px 8px;
    }

    /* --- Precintos --- */
    .precintos-inputs {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}