/* ============================================================
   KnowledgeAgent Custom Theme
   Professional data-tool palette built on Telerik Bootstrap theme.
   All pages reference these CSS custom properties for consistency.
   ============================================================ */

:root {
    /* --- Primary palette (deep navy / teal accent) --- */
    --ka-primary:           #0f3460;
    --ka-primary-light:     #1a4a7a;
    --ka-primary-dark:      #0a2340;
    --ka-accent:            #00a8cc;
    --ka-accent-light:      #33c4e0;
    --ka-accent-dark:       #007a99;

    /* --- Neutral surfaces --- */
    --ka-surface-page:      #f0f4f8;
    --ka-surface-card:      #ffffff;
    --ka-surface-raised:    #f7f9fc;
    --ka-surface-header:    #e8edf4;
    --ka-surface-sidebar:   #0f3460;
    --ka-surface-sidebar-hover: rgba(255, 255, 255, 0.08);
    --ka-surface-sidebar-active: rgba(255, 255, 255, 0.18);

    /* --- Borders --- */
    --ka-border:            #d4dce8;
    --ka-border-light:      #e4eaf2;
    --ka-border-focus:      #00a8cc;

    /* --- Text --- */
    --ka-text-primary:      #1a2b42;
    --ka-text-secondary:    #4e6282;
    --ka-text-muted:        #7b8da6;
    --ka-text-on-primary:   #ffffff;
    --ka-text-on-accent:    #ffffff;
    --ka-text-link:         #0f3460;

    /* --- Shadows --- */
    --ka-shadow-sm:         0 1px 3px rgba(15, 52, 96, 0.06);
    --ka-shadow-md:         0 4px 12px rgba(15, 52, 96, 0.08);
    --ka-shadow-lg:         0 8px 24px rgba(15, 52, 96, 0.10);
    --ka-shadow-card:       0 2px 8px rgba(15, 52, 96, 0.06);

    /* --- Radius --- */
    --ka-radius-sm:         0.375rem;
    --ka-radius-md:         0.5rem;
    --ka-radius-lg:         0.75rem;
    --ka-radius-xl:         1rem;

    /* --- Spacing helpers --- */
    --ka-page-padding:      1.5rem;

    /* --- Status colors --- */
    --ka-success:           #28a745;
    --ka-warning:           #e8a317;
    --ka-danger:            #dc3545;
    --ka-info:              #00a8cc;

    /* --- Transitions --- */
    --ka-transition-fast:   150ms ease;
    --ka-transition-normal: 250ms ease;
}

/* ============================================================
   Global overrides
   ============================================================ */

html, body {
    background-color: var(--ka-surface-page);
    color: var(--ka-text-primary);
    font-family: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--ka-text-link);
}

a:hover {
    color: var(--ka-primary-light);
}

/* ============================================================
   Telerik theme variable overrides
   ============================================================ */

:root {
    --kendo-color-primary:       var(--ka-primary);
    --kendo-color-primary-hover: var(--ka-primary-light);
    --kendo-color-primary-focus: var(--ka-primary-light);
}

/* ============================================================
   Shared card pattern
   All pages can use .ka-card instead of custom per-page cards.
   ============================================================ */

.ka-card {
    background: var(--ka-surface-card);
    border: 1px solid var(--ka-border);
    border-radius: var(--ka-radius-lg);
    box-shadow: var(--ka-shadow-card);
    overflow: hidden;
}

.ka-card-header {
    padding: 0.875rem 1.25rem;
    background: var(--ka-surface-raised);
    border-bottom: 1px solid var(--ka-border-light);
    font-weight: 600;
    color: var(--ka-text-primary);
    font-size: 0.95rem;
}

.ka-card-body {
    padding: 1rem 1.25rem;
}

.ka-card-footer {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--ka-border-light);
    background: var(--ka-surface-raised);
}

/* ============================================================
   App bar (top header)
   ============================================================ */

.ka-appbar {
    display: flex;
    align-items: center;
    height: 3.25rem;
    padding: 0 1.25rem;
    background: var(--ka-primary);
    color: var(--ka-text-on-primary);
    box-shadow: var(--ka-shadow-sm);
    z-index: 100;
    position: sticky;
    top: 0;
    gap: 0.75rem;
}

.ka-appbar-brand {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    color: var(--ka-text-on-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ka-appbar-brand svg {
    width: 1.4rem;
    height: 1.4rem;
    flex-shrink: 0;
}

.ka-appbar-spacer {
    flex: 1;
}

.ka-appbar-status {
    font-size: 0.82rem;
    opacity: 0.85;
    font-weight: 500;
}

.ka-appbar-toggle {
    background: none;
    border: none;
    color: var(--ka-text-on-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: var(--ka-radius-sm);
    transition: background var(--ka-transition-fast);
    padding: 0;
}

.ka-appbar-toggle:hover {
    background: rgba(255,255,255,0.12);
}

.ka-appbar-toggle svg {
    width: 1.25rem;
    height: 1.25rem;
}

/* ============================================================
   Sidebar / Drawer
   ============================================================ */

.ka-drawer {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.ka-sidebar {
    width: 240px;
    min-width: 240px;
    background: var(--ka-surface-sidebar);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: width var(--ka-transition-normal), min-width var(--ka-transition-normal);
    border-right: 1px solid rgba(255,255,255,0.06);
}

.ka-sidebar.collapsed {
    width: 56px;
    min-width: 56px;
}

.ka-sidebar-section {
    padding: 0.75rem 0;
}

.ka-sidebar-section-label {
    padding: 0 1rem;
    margin-bottom: 0.35rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255,255,255,0.4);
}

.ka-sidebar.collapsed .ka-sidebar-section-label {
    display: none;
}

.ka-nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    margin: 0.125rem 0.5rem;
    border-radius: var(--ka-radius-sm);
    color: rgba(255,255,255,0.72);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    transition: background var(--ka-transition-fast), color var(--ka-transition-fast);
    white-space: nowrap;
    overflow: hidden;
}

.ka-nav-item:hover {
    background: var(--ka-surface-sidebar-hover);
    color: rgba(255,255,255,0.95);
    text-decoration: none;
}

.ka-nav-item.active {
    background: var(--ka-surface-sidebar-active);
    color: #fff;
}

.ka-nav-item svg {
    width: 1.15rem;
    height: 1.15rem;
    flex-shrink: 0;
    opacity: 0.85;
}

.ka-nav-item.active svg {
    opacity: 1;
}

.ka-nav-item-text {
    overflow: hidden;
    text-overflow: ellipsis;
}

.ka-sidebar.collapsed .ka-nav-item {
    justify-content: center;
    padding: 0.6rem;
    margin: 0.125rem 0.25rem;
}

.ka-sidebar.collapsed .ka-nav-item-text {
    display: none;
}

/* ============================================================
   Main content area
   ============================================================ */

.ka-main {
    flex: 1;
    overflow-y: auto;
    padding: var(--ka-page-padding);
    background: var(--ka-surface-page);
    min-height: 0;
}

/* ============================================================
   Page header pattern
   ============================================================ */

.ka-page-header {
    margin-bottom: 1.25rem;
}

.ka-page-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--ka-text-primary);
    margin: 0 0 0.25rem 0;
}

.ka-page-subtitle {
    font-size: 0.9rem;
    color: var(--ka-text-secondary);
    margin: 0;
}

/* ============================================================
   Button accents (for non-Telerik buttons)
   ============================================================ */

.ka-btn-primary {
    background: var(--ka-primary);
    color: var(--ka-text-on-primary);
    border: none;
    border-radius: var(--ka-radius-sm);
    padding: 0.5rem 1rem;
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    transition: background var(--ka-transition-fast);
}

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

.ka-btn-primary:disabled {
    background: var(--ka-text-muted);
    cursor: not-allowed;
}

.ka-btn-accent {
    background: var(--ka-accent);
    color: var(--ka-text-on-accent);
    border: none;
    border-radius: var(--ka-radius-sm);
    padding: 0.5rem 1rem;
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    transition: background var(--ka-transition-fast);
}

.ka-btn-accent:hover {
    background: var(--ka-accent-dark);
}

.ka-btn-outline {
    background: transparent;
    color: var(--ka-text-secondary);
    border: 1px solid var(--ka-border);
    border-radius: var(--ka-radius-sm);
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.88rem;
    cursor: pointer;
    transition: border-color var(--ka-transition-fast), color var(--ka-transition-fast);
}

.ka-btn-outline:hover {
    border-color: var(--ka-primary);
    color: var(--ka-primary);
}

/* ============================================================
   Status badges
   ============================================================ */

.ka-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
}

.ka-badge-info {
    background: rgba(0,168,204,0.1);
    color: var(--ka-info);
}

.ka-badge-success {
    background: rgba(40,167,69,0.1);
    color: var(--ka-success);
}

.ka-badge-warning {
    background: rgba(232,163,23,0.1);
    color: var(--ka-warning);
}

/* ============================================================
   Mobile responsive
   ============================================================ */

@media (max-width: 768px) {
    .ka-sidebar {
        position: fixed;
        left: 0;
        top: 3.25rem;
        bottom: 0;
        z-index: 200;
        transform: translateX(-100%);
        transition: transform var(--ka-transition-normal);
    }

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

    .ka-main {
        padding: 1rem;
    }
}