/* ESTILOS DE DISEÑO FORMAL Y CORPORATIVO - ANÁLISIS DE COSTOS */
:root {
    --primary: #1e3a8a;          /* Azul marino profundo */
    --primary-light: #2563eb;
    --primary-dark: #0f172a;     /* Slate oscuro corporativo */
    --secondary: #334155;        /* Slate formal */
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #0f172a;        /* Texto oscuro de alto contraste */
    --text-muted: #475569;
    --border-color: #cbd5e1;     /* Borde formal nítido */
    --border-dark: #94a3b8;
    --radius: 4px;               /* Cuadrado formal */
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    font-size: 14px;
    line-height: 1.5;
}

/* Modal de Autenticación / Login Seguro */
#loginOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.95);
    z-index: 99999;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-card {
    background: #ffffff;
    border: 1px solid var(--border-dark);
    border-radius: var(--radius);
    width: 100%;
    max-width: 400px;
    padding: 32px 28px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    text-align: center;
}

.login-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 6px;
}

.login-sub {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-form input {
    padding: 10px 14px;
    border: 1px solid var(--border-dark);
    border-radius: var(--radius);
    font-size: 14px;
    outline: none;
}

.login-form input:focus {
    border-color: var(--primary-light);
}

.btn-login {
    background: var(--primary);
    color: #ffffff;
    border: none;
    padding: 11px;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s;
}

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

.login-error {
    display: none;
    color: #9f1239;
    background: #ffe4e6;
    border: 1px solid #fecdd3;
    padding: 8px 12px;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 600;
}

/* Cabecera Formal */
.navbar {
    background-color: var(--primary-dark);
    color: #ffffff;
    padding: 18px 32px;
    border-bottom: 3px solid var(--primary-light);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar h1 {
    font-size: 22px;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.3px;
}

.navbar p {
    margin: 3px 0 0 0;
    font-size: 13px;
    color: #cbd5e1;
}

.btn-logout {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 6px 14px;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}

.btn-logout:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Contenedor Principal */
.main-wrapper {
    max-width: 1400px;
    margin: 24px auto;
    padding: 0 20px;
}

/* Zona de Carga Inicial (Única vista visible antes de subir archivo) */
.upload-card {
    background: var(--bg-card);
    border: 2px dashed var(--border-dark);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    margin: 40px auto;
    max-width: 700px;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.upload-card:hover {
    background: #f1f5f9;
    border-color: var(--primary-light);
}

.upload-title {
    font-weight: 700;
    font-size: 18px;
    color: var(--primary-dark);
}

.upload-sub {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 6px;
}

.loading-spinner {
    display: none;
    text-align: center;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-weight: 700;
    color: var(--primary);
    font-size: 15px;
}

/* Alerta de Filas Omitidas / Errores */
.status-alert {
    display: none;
    background: #fffbe6;
    border: 1px solid #ffe58f;
    color: #873800;
    padding: 10px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 600;
}

/* Panel de Filtros Superior (Oculto hasta cargar CSV) */
.filters-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 20px;
    display: none;
}

.filters-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.filters-header .title {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary-dark);
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 14px;
}

.filter-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.filter-item label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.filter-item select, .filter-item input {
    padding: 7px 10px;
    border: 1px solid var(--border-dark);
    border-radius: var(--radius);
    font-size: 13px;
    background: #ffffff;
    color: var(--text-main);
    font-weight: 500;
}

.btn-reset {
    background: #f1f5f9;
    border: 1px solid var(--border-dark);
    padding: 6px 14px;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    color: var(--text-main);
}

.btn-reset:hover {
    background: #e2e8f0;
}

/* Bloque de KPIs (Oculto hasta cargar CSV) */
.kpi-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-bottom: 20px;
    display: none;
}

.kpi-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px 18px;
}

.kpi-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.kpi-num {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-top: 4px;
}

.kpi-sub {
    font-size: 12px;
    color: var(--secondary);
    margin-top: 2px;
    font-weight: 600;
}

/* Pestañas Formales (Ocultas hasta cargar CSV) */
.tabs-bar {
    display: flex;
    gap: 6px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 24px;
    display: none;
}

.tab-btn {
    padding: 12px 22px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    margin-bottom: -2px;
}

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

.tab-btn.active {
    color: var(--primary-dark);
    border-bottom-color: var(--primary);
    background: #ffffff;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* Pestaña Tendencia */
.trend-control-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
}

.trend-select-box {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.trend-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.trend-field label {
    font-weight: 700;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.trend-field select {
    padding: 8px 12px;
    border-radius: var(--radius);
    border: 1px solid var(--border-dark);
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-dark);
    min-width: 220px;
}

.trend-stats {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-item .lbl {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.stat-item .val {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-dark);
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 24px;
    height: 380px;
    position: relative;
}

/* Tablas y Tarjetas Formales */
.formal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 24px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.formal-card-header {
    background: var(--primary-dark);
    padding: 14px 20px;
    font-weight: 700;
    font-size: 15px;
    color: #ffffff;
    border-bottom: 1px solid var(--border-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.formal-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.formal-table th {
    background: #f1f5f9;
    color: var(--primary-dark);
    font-weight: 700;
    text-align: left;
    padding: 10px 14px;
    border-bottom: 2px solid var(--border-color);
    font-size: 12px;
    text-transform: uppercase;
    user-select: none;
}

.formal-table th.sortable {
    cursor: pointer;
    transition: background 0.15s;
}

.formal-table th.sortable:hover {
    background: #cbd5e1;
    color: var(--primary-dark);
}

.formal-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

.formal-table tbody tr:hover {
    background: #f1f5f9;
}

/* Fila de Predicción Futura en Tabla */
.tr-predicted {
    background-color: #fff1f2 !important;
    color: #9f1239 !important;
}

.tr-predicted td {
    color: #9f1239 !important;
    border-bottom: 1px dashed #fecdd3 !important;
}

.badge-tag {
    background: #ffffff;
    color: var(--primary-dark);
    padding: 4px 10px;
    border-radius: 3px;
    font-size: 12px;
    font-weight: 700;
    border: 1px solid var(--border-color);
}

.badge-prediction {
    background: #ffe4e6;
    color: #9f1239;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 700;
    border: 1px solid #fecdd3;
}

/* Matriz por Concentración e Importador */
.matrix-toolbar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 14px 20px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
}

.matrix-toolbar label {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-dark);
}

.matrix-toolbar select {
    padding: 8px 14px;
    border: 1px solid var(--border-dark);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-dark);
    background: #ffffff;
}

.matrix-sub-block {
    background: #ffffff;
    border: 1px solid var(--border-dark);
    border-radius: var(--radius);
    margin-bottom: 18px;
    overflow: hidden;
}

.matrix-sub-block:last-child {
    margin-bottom: 0;
}

.matrix-sub-title {
    background: var(--secondary);
    padding: 10px 16px;
    font-weight: 700;
    font-size: 14px;
    color: #ffffff;
    border-bottom: 1px solid var(--border-dark);
    letter-spacing: 0.2px;
}

/* Hover Tooltip Flotante */
#detailTooltip {
    position: fixed;
    display: none;
    width: 340px;
    background: #ffffff;
    border: 2px solid var(--primary-dark);
    border-radius: var(--radius);
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
    padding: 14px;
    z-index: 9999;
    pointer-events: none;
    font-size: 12px;
}

#detailTooltip h4 {
    margin: 0 0 8px 0;
    font-size: 14px;
    color: var(--primary-dark);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
    font-weight: 700;
}

.tt-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 12px;
}

.tt-row label {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    display: block;
}

.tt-row span {
    font-weight: 700;
    color: var(--text-main);
}

.tt-full {
    grid-column: span 2;
}

/* Paginador Explorador */
.table-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
    gap: 14px;
}

.table-controls input {
    padding: 8px 14px;
    border: 1px solid var(--border-dark);
    border-radius: var(--radius);
    width: 300px;
    font-size: 13px;
    font-weight: 500;
}

.pagination {
    display: flex;
    gap: 6px;
    align-items: center;
}

.pagination button {
    padding: 6px 12px;
    border: 1px solid var(--border-dark);
    background: #ffffff;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
}

.no-data {
    text-align: center;
    color: var(--text-muted);
    padding: 36px;
    font-style: italic;
    font-size: 14px;
}