/* =============================================================
   Nómina Inteligente — Layout System
   Sidebar + Header + Content area
   ============================================================= */

/* --- Layout principal (post-login) --- */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--gradient-sidebar);
    color: var(--color-text-sidebar);
    display: flex;
    flex-direction: column;
    z-index: var(--z-sidebar);
    transition: width var(--transition-base);
    overflow: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar__logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg) var(--space-lg);
    border-bottom: 1px solid var(--color-border-sidebar);
    min-height: var(--header-height);
}

.sidebar__logo img {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.sidebar__logo-text {
    font-family: var(--font-display);
    font-weight: var(--font-weight-bold);
    font-size: var(--text-sm);
    color: var(--color-text-sidebar-active);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar__logo-text {
    opacity: 0;
    width: 0;
}

.sidebar__nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md) 0;
}

.sidebar__section {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-sidebar-muted);
    margin-top: var(--space-md);
}

.sidebar.collapsed .sidebar__section {
    text-align: center;
    padding: var(--space-sm);
    font-size: 0;
}

.sidebar__link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    color: var(--color-text-sidebar);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    text-decoration: none;
}

.sidebar__link:hover {
    background-color: var(--color-bg-sidebar-hover);
    color: var(--color-text-sidebar-active);
}

.sidebar__link.active {
    background-color: var(--color-bg-sidebar-active);
    color: var(--color-text-sidebar-active);
    border-left-color: var(--color-secondary);
}

.sidebar__link-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar__link-text {
    white-space: nowrap;
    overflow: hidden;
    transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar__link-text {
    opacity: 0;
    width: 0;
}

.sidebar.collapsed .sidebar__link {
    justify-content: center;
    padding: var(--space-sm);
    border-left: none;
}

.sidebar__footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-border-sidebar);
}

/* --- Área principal --- */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-base);
}

.sidebar.collapsed ~ .main-wrapper {
    margin-left: var(--sidebar-collapsed-width);
}

/* --- Header --- */
.header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background-color: var(--color-bg-page-header);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    z-index: var(--z-header);
    box-shadow: var(--shadow-sm);
}

.header__left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.header__toggle:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
}

.header__breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.header__breadcrumb a {
    color: var(--color-text-secondary);
}

.header__breadcrumb a:hover {
    color: var(--color-primary);
}

.header__breadcrumb-separator {
    color: var(--color-text-muted);
    margin: 0 var(--space-xs);
}

.header__breadcrumb-current {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.header__center {
    flex: 1;
    max-width: 480px;
    margin: 0 var(--space-xl);
}

.header__search {
    position: relative;
    width: 100%;
}

.header__search-input {
    width: 100%;
    height: 40px;
    padding: 0 var(--space-md) 0 40px;
    background-color: var(--color-bg-main);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.header__search-input:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
    background-color: var(--color-bg-card);
}

.header__search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.header__search {
    position: relative;
}

.header__search-shortcut {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: var(--font-mono);
}

/* --- Search Results Dropdown --- */
.search-results {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    max-height: 420px;
    overflow-y: auto;
    z-index: var(--z-tooltip);
    animation: dropdown-in 0.15s ease;
}

.search-results__group {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-text-muted);
    background-color: var(--color-bg-main);
    border-bottom: 1px solid var(--color-border-light);
}

.search-results__item {
    display: flex;
    flex-direction: column;
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    color: inherit;
    border-bottom: 1px solid var(--color-border-light);
    transition: background-color var(--transition-fast);
}

.search-results__item:hover {
    background-color: var(--color-bg-hover);
}

.search-results__item:last-child {
    border-bottom: none;
}

.search-results__label {
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.search-results__sublabel {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* Empty state — la búsqueda corrió pero no encontró nada */
.search-results__empty {
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

@keyframes dropdown-in {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Botón móvil del buscador (solo visible en <768px) --- */
.header__search-mobile-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    align-items: center;
    justify-content: center;
}
.header__search-mobile-toggle:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
}

/* --- Overlay del buscador móvil (full-screen) --- */
.search-overlay {
    position: fixed;
    inset: 0;
    background-color: var(--color-bg-main);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    animation: search-overlay-in 0.18s ease;
}
.search-overlay[hidden] {
    display: none;
}

.search-overlay__header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg-card);
}

.search-overlay__icon {
    display: flex;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.search-overlay__input {
    flex: 1;
    min-width: 0;
    border: none;
    background: none;
    font-size: var(--text-base);
    color: var(--color-text-primary);
    outline: none;
    padding: var(--space-xs) 0;
}
.search-overlay__input::placeholder {
    color: var(--color-text-muted);
}

.search-overlay__close {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.search-overlay__close:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
}

.search-overlay__results {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    -webkit-overflow-scrolling: touch;
}

/* Override del .search-results dentro del overlay: que no flote, que no
   tenga shadow ni border-radius (el overlay ya provee el contenedor) */
.search-overlay__results > .search-results {
    position: static;
    max-height: none;
    box-shadow: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-card);
    animation: none;
}

@keyframes search-overlay-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* --- Loading spinner del buscador (desktop + mobile overlay) ---
   Mientras la búsqueda está en vuelo, oculta el ícono lupa y muestra
   un spinner girando en su lugar. Reusa la animación btn-spin de
   components.css. La clase .is-search-loading se aplica al
   contenedor (.header__search o .search-overlay__header) desde el JS. */
.header__search-icon-spinner,
.search-overlay__icon-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
}

.is-search-loading .header__search-icon svg,
.is-search-loading .search-overlay__icon svg {
    display: none;
}
.is-search-loading .header__search-icon-spinner,
.is-search-loading .search-overlay__icon-spinner {
    display: block;
}

.header__right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header__theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.header__theme-toggle:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
    border-color: var(--color-border-focus);
}

.header__theme-icon { display: none; }
[data-ni-theme="system"] .header__theme-icon--system,
[data-ni-theme="light"] .header__theme-icon--light,
[data-ni-theme="dark"] .header__theme-icon--dark { display: block; }

.header__user {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

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

.header__avatar {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    background: var(--gradient-brand);
    color: var(--color-text-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    flex-shrink: 0;
}

.header__user-info {
    display: flex;
    flex-direction: column;
}

.header__user-name {
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    line-height: 1.2;
}

.header__user-role {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    line-height: 1.2;
}

/* --- Contenido principal --- */
.main-content {
    flex: 1;
    padding: var(--space-xl);
    max-width: var(--content-max-width);
    width: 100%;
    margin: 0 auto;
}

/* --- Page header (título + acciones) --- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.page-header__title {
    font-size: var(--text-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.page-header__subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.page-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* --- Overlay para sidebar móvil --- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: var(--color-bg-overlay);
    z-index: calc(var(--z-sidebar) - 1);
}

.sidebar-overlay.active {
    display: block;
}

/* --- Utilidades de layout --- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.w-full { width: 100%; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.hidden { display: none !important; }