:root {
    --brand-primary: #2563EB;
    --brand-primary-hover: #1D4ED8;
    --brand-accent: #DBEAFE;
    --brand-text: #111827;
    --brand-text-secondary: #475569;
    --brand-background: #F8FAFC;
    --brand-surface: #FFFFFF;
    --brand-border: #E2E8F0;
    --brand-success: #D1FAE5;
    --brand-warning: #F59E0B;
    --bg: var(--brand-background);
    --bg-light: var(--brand-background);
    --bg-card: var(--brand-surface);
    --surface: var(--brand-surface);
    --white: var(--brand-surface);
    --text: var(--brand-text);
    --text-light: var(--brand-text-secondary);
    --text-dark: var(--brand-text);
    --border: var(--brand-border);
    --border-color: var(--brand-border);
    --primary-color: var(--brand-primary);
    --primary-hover: var(--brand-primary-hover);
    --primary: var(--brand-primary);
    --primary-dark: var(--brand-primary-hover);
    --primary-light: var(--brand-accent);
    --primary-soft: var(--brand-accent);
    --primary-muted: rgba(37, 99, 235, 0.16);
    --on-primary: #FFFFFF;
    --btn-primary-text: var(--on-primary);
    --danger: var(--brand-warning);
    --danger-dark: var(--brand-primary-hover);
    --danger-color: var(--brand-warning);
    --danger-hover: var(--brand-primary-hover);
    --btn-primary: var(--brand-primary);
    --btn-primary-hover: var(--brand-primary-hover);
    --success-color: var(--brand-primary);
    --empresa-lime-green: var(--brand-primary);
    --empresa-lime-green-darker: var(--brand-primary-hover);
    --empresa-lime-green-rgb: 37, 99, 235;
    --empresa-dark-blue: var(--brand-text);
    --empresa-dark-gray: var(--brand-text-secondary);
    --empresa-medium-gray: var(--brand-text-secondary);
    --empresa-off-white: var(--brand-background);
    --main-bg-color: var(--brand-background);
    --content-bg-color: var(--brand-surface);
    --text-color: var(--brand-text);
    --border-color: var(--brand-border);
}
body.dark-mode {
    --brand-primary: #60A5FA;
    --brand-primary-hover: #93C5FD;
    --brand-accent: #1E3A8A;
    --brand-text: #F8FAFC;
    --brand-text-secondary: #CBD5E1;
    --brand-background: #0F172A;
    --brand-surface: #1E293B;
    --brand-border: #334155;
    --brand-success: #6EE7B7;
    --brand-warning: #FBBF24;
    --bg: var(--brand-background);
    --bg-light: var(--brand-background);
    --bg-card: var(--brand-surface);
    --surface: var(--brand-surface);
    --white: var(--brand-surface);
    --text: var(--brand-text);
    --text-light: var(--brand-text-secondary);
    --text-dark: var(--brand-text);
    --border: var(--brand-border);
    --border-color: var(--brand-border);
    --primary-color: var(--brand-primary);
    --primary-hover: var(--brand-primary-hover);
    --primary: var(--brand-primary);
    --primary-dark: var(--brand-primary-hover);
    --primary-light: var(--brand-accent);
    --primary-soft: var(--brand-accent);
    --primary-muted: rgba(96, 165, 250, 0.18);
    --on-primary: #111111;
    --btn-primary-text: var(--on-primary);
    --danger: var(--brand-warning);
    --danger-dark: var(--brand-primary-hover);
    --danger-color: var(--brand-warning);
    --danger-hover: var(--brand-primary-hover);
    --btn-primary: var(--brand-primary);
    --btn-primary-hover: var(--brand-primary-hover);
    --success-color: var(--brand-primary);
    --empresa-lime-green: var(--brand-primary);
    --empresa-lime-green-darker: var(--brand-primary-hover);
    --empresa-lime-green-rgb: 96, 165, 250;
    --empresa-dark-blue: var(--brand-text);
    --empresa-dark-gray: var(--brand-text-secondary);
    --empresa-medium-gray: var(--brand-text-secondary);
    --empresa-off-white: var(--brand-surface);
    --main-bg-color: var(--brand-background);
    --content-bg-color: var(--brand-surface);
    --text-color: var(--brand-text);
    --border-color: var(--brand-border);
}
.sidebar {
    background: var(--brand-surface);
    color: var(--brand-text);
}
.sidebar-header,
.sidebar-footer,
.conversation-sidebar-section,
.payroll-section-header {
    border-color: rgba(17, 24, 39, 0.1);
}
.sidebar-button,
.sidebar-chat-title {
    color: var(--brand-text);
}
.sidebar-chat-item {
    background: rgba(37, 99, 235, 0.07);
    border: 1px solid rgba(37, 99, 235, 0.12);
}
.sidebar-chat-item:hover {
    background: rgba(37, 99, 235, 0.13);
}
.sidebar-chat-item.active {
    background: rgba(37, 99, 235, 0.17);
    border-color: rgba(37, 99, 235, 0.3);
}
.sidebar-chat-date,
#noChatsMessage {
    color: var(--brand-text-secondary);
}
body.dark-mode .sidebar {
    background: var(--brand-surface);
    color: var(--brand-text);
}
body.dark-mode .sidebar-header,
body.dark-mode .sidebar-footer,
body.dark-mode .conversation-sidebar-section,
body.dark-mode .payroll-section-header {
    border-color: rgba(255, 255, 255, 0.1);
}
body.dark-mode .sidebar-button,
body.dark-mode .sidebar-chat-title,
body.dark-mode .payroll-section-header {
    color: #ffffff;
}
body.dark-mode .sidebar-chat-item {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.09);
}
body.dark-mode .sidebar-chat-item:hover {
    background: rgba(255, 255, 255, 0.11);
}
body.dark-mode .sidebar-chat-item.active {
    background: rgba(96, 165, 250, 0.2);
    border-color: rgba(96, 165, 250, 0.38);
}
body.dark-mode .sidebar-chat-date,
body.dark-mode #noChatsMessage {
    color: rgba(255, 255, 255, 0.58);
}
.btn-primary,
.btn-success,
.btn-save,
.btn-save-rfc,
.btn-submit,
.btn-primary-modal,
.btn-vector,
.btn-conf-save,
.btn-new-chat,
.btn-send,
.chatbot-send,
#newChatBtn,
.msg.user .msg-bubble {
    color: var(--on-primary);
}
.btn-primary svg,
.btn-success svg,
.btn-save svg,
.btn-submit svg,
.btn-new-chat svg,
.btn-send svg,
.chatbot-send svg,
#newChatBtn svg,
.msg.user .msg-avatar svg {
    color: var(--on-primary);
    stroke: currentColor;
}
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 50;
}
.palette-toggle-button {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border: 1px solid var(--brand-border);
    border-radius: 8px;
    background: var(--brand-surface);
    color: var(--brand-text);
    cursor: pointer;
    font-size: 1.05rem;
    line-height: 1;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.palette-toggle-button:hover,
.palette-toggle-button[aria-expanded="true"] {
    transform: translateY(-1px);
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(var(--empresa-lime-green-rgb), 0.14);
}
.theme-palette-popover {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: min(360px, calc(100vw - 24px));
    padding: 14px;
    border: 1px solid var(--brand-border);
    border-radius: 10px;
    background: var(--brand-surface);
    color: var(--brand-text);
    box-shadow: 0 14px 34px rgba(15, 23, 42, 0.18);
}
.theme-palette-popover[hidden] {
    display: none;
}
.theme-palette-popover-title {
    margin-bottom: 10px;
    font-size: 0.78rem;
    font-weight: 800;
    color: var(--brand-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0;
}
.theme-palette-popover .palette-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(86px, 1fr));
    gap: 8px;
}
.theme-palette-popover .palette-option {
    min-width: 0;
    display: grid;
    justify-items: center;
    gap: 6px;
    padding: 8px 6px;
    border: 1px solid var(--brand-border);
    border-radius: 8px;
    background: var(--brand-surface);
    color: var(--brand-text);
    cursor: pointer;
    font: inherit;
    font-size: 0.72rem;
    font-weight: 800;
    line-height: 1.1;
    overflow: hidden;
}
.theme-palette-popover .palette-option:hover,
.theme-palette-popover .palette-option.is-active {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    box-shadow: 0 0 0 2px rgba(var(--empresa-lime-green-rgb), 0.13);
}
.theme-palette-popover .palette-swatch {
    width: min(52px, 100%);
    height: 18px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    overflow: hidden;
    border-radius: 999px;
    border: 1px solid rgba(0, 0, 0, 0.08);
}
.theme-palette-popover .palette-option > span:last-child {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Transición suave al navegar entre paneles -- pedido explícito del jefe,
   2026-09-03: "para que no se vea brusco, y se vea fluido". Esta app es
   multi-página (cada panel es un HTML servido aparte, no un SPA) -- la
   View Transitions API nativa del navegador anima el cambio ENTRE dos
   documentos completos (cross-fade por default) con una sola regla CSS,
   sin JavaScript ni reescribir nada a SPA. Solo funciona si AMBAS páginas
   (la de salida y la de entrada) cargan brand-theme.css, que es el caso
   en 41 de las 43 plantillas -- por eso se pone aquí y no en un archivo
   suelto. Navegadores que no soportan la API (fuera de Chromium/Edge/
   Opera) simplemente ignoran la regla y navegan como siempre, sin error.
   Doc: https://developer.chrome.com/docs/web-platform/view-transitions/cross-document */
@view-transition {
    navigation: auto;
}