/* ============================================================
   AX Office Hub — Knowledge workspace shell
   - Reuses MAK.IT tokens (warm cream, coral accents, dark sidebar)
   - Contained: only `[data-page="ax-office-hub"]` body
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

body[data-page="ax-office-hub"] {
    font-family: var(--mk-font-sans);
    line-height: 1.6;
    color: var(--mk-color-text);
    background: var(--mk-color-bg);
    min-height: 100vh;
}

/* ---------- Top nav ---------- */
.top-nav {
    background: var(--mk-color-bg);
    border-bottom: 1px solid var(--mk-color-border);
    padding: 0.625rem 0;
    position: sticky;
    top: 0;
    z-index: var(--mk-z-sticky, 100);
}
.top-nav-container {
    max-width: none;
    margin: 0;
    padding: 0 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.nav-logo { display: flex; align-items: center; gap: 0.5rem; }
.logo-text {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--mk-color-text);
    letter-spacing: -0.5px;
}
.hub-crumb { color: var(--mk-color-text-faint); font-weight: 400; }
.hub-name { font-size: 0.95rem; color: var(--mk-color-text-muted); font-weight: 600; }
.nav-links { display: flex; align-items: center; gap: 0.75rem; }
.nav-link {
    color: var(--mk-color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.375rem 0.625rem;
    border-radius: var(--mk-radius-md);
    transition: background 0.15s, color 0.15s;
}
.nav-link:hover { background: var(--mk-color-bg-muted); color: var(--mk-color-text); }
.nav-alert-btn, .nav-settings-btn, .hub-mobile-toggle {
    background: none; border: none; cursor: pointer;
    color: var(--mk-color-text-muted); padding: 0.375rem;
    border-radius: var(--mk-radius-md);
}
.nav-alert-btn:hover, .nav-settings-btn:hover, .hub-mobile-toggle:hover { background: var(--mk-color-bg-muted); color: var(--mk-color-text); }
.hub-mobile-toggle { display: none; }
.hub-sidebar-backdrop {
    display: none;
    position: fixed; inset: 56px 0 0 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 49;
}
.hub-sidebar-backdrop:not([hidden]) { display: block; }

/* ---------- Layout ---------- */
.hub-container {
    display: flex;
    min-height: calc(100vh - 56px);
    max-width: none;
    margin: 0;
}

/* ---------- Hub sidebar (warm dark) ---------- */
.hub-sidebar {
    width: 248px;
    flex-shrink: 0;
    background: var(--mk-color-sidebar-bg);
    color: var(--mk-color-sidebar-text);
    border-right: 1px solid var(--mk-color-sidebar-border);
    display: flex;
    flex-direction: column;
    padding: 0.875rem 0.625rem;
    gap: 1rem;
    overflow-y: auto;
}
.hub-side-search {
    display: flex; align-items: center; gap: 0.5rem;
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--mk-color-sidebar-bg-hover);
    border: 1px solid var(--mk-color-sidebar-border);
    border-radius: var(--mk-radius-md);
    color: var(--mk-color-sidebar-text-muted);
    font-size: 0.8125rem;
    cursor: pointer;
    text-align: left;
    transition: background 0.15s, color 0.15s;
}
.hub-side-search:hover { background: var(--mk-color-sidebar-bg-active); color: var(--mk-color-sidebar-text-strong); }
.hub-side-search kbd {
    margin-left: auto;
    font-size: 0.6875rem;
    padding: 1px 5px;
    background: rgba(255,255,255,0.06);
    border-radius: 4px;
    border: 1px solid var(--mk-color-sidebar-border);
}

.hub-side-nav { display: flex; flex-direction: column; gap: 0.125rem; }
.hub-side-item {
    display: flex; align-items: center; gap: 0.625rem;
    padding: 0.5rem 0.625rem;
    border-radius: var(--mk-radius-md);
    color: var(--mk-color-sidebar-text);
    text-decoration: none;
    font-size: 0.875rem;
    transition: background 0.15s, color 0.15s;
}
.hub-side-item svg { opacity: 0.75; flex-shrink: 0; }
.hub-side-item:hover { background: var(--mk-color-sidebar-bg-hover); color: var(--mk-color-sidebar-text-strong); }
.hub-side-item.active { background: var(--mk-color-sidebar-bg-active); color: var(--mk-color-sidebar-text-strong); }

.hub-side-section-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.25rem 0.625rem;
    font-size: 0.6875rem; font-weight: 600;
    color: var(--mk-color-sidebar-text-muted);
    text-transform: uppercase; letter-spacing: 0.06em;
}
.hub-side-add {
    background: none; border: none; cursor: pointer;
    color: var(--mk-color-sidebar-text-muted);
    width: 22px; height: 22px;
    border-radius: 6px; font-size: 1rem; line-height: 1;
}
.hub-side-add:hover { background: var(--mk-color-sidebar-bg-hover); color: var(--mk-color-sidebar-text-strong); }

.hub-side-collection-list { display: flex; flex-direction: column; gap: 0.125rem; }
.hub-side-collection {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.4375rem 0.625rem;
    border-radius: var(--mk-radius-md);
    color: var(--mk-color-sidebar-text);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: background 0.15s, color 0.15s;
}
.hub-side-collection:hover { background: var(--mk-color-sidebar-bg-hover); color: var(--mk-color-sidebar-text-strong); }
.hub-side-collection.active { background: var(--mk-color-sidebar-bg-active); color: var(--mk-color-sidebar-text-strong); }
.hub-side-collection .col-emoji { font-size: 0.95rem; }
.hub-side-collection .col-count {
    margin-left: auto;
    font-size: 0.6875rem;
    color: var(--mk-color-sidebar-text-muted);
}

/* ---------- Main ---------- */
.hub-main {
    flex: 1;
    min-width: 0;
    overflow-y: auto;
    background: var(--mk-color-bg);
}
.hub-view {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
}

/* ---------- Home view ---------- */
.hub-hero {
    text-align: center;
    padding: 1.5rem 0 2rem;
}
.hub-hero h1 {
    font-size: clamp(1.75rem, 1.4rem + 1.4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    color: var(--mk-color-text);
}
.hub-hero h1 .accent { color: var(--mk-color-brand-600); }
.hub-hero p { color: var(--mk-color-text-muted); font-size: 1rem; }

.hub-aibar {
    margin: 0 auto 2rem;
    max-width: 720px;
    background: var(--mk-color-bg-subtle);
    border: 1px solid var(--mk-color-border);
    border-radius: var(--mk-radius-xl);
    padding: 1rem 1.125rem;
    box-shadow: var(--mk-shadow-sm);
}
.hub-aibar-row { display: flex; align-items: center; gap: 0.625rem; }
.hub-aibar-icon {
    width: 32px; height: 32px;
    flex-shrink: 0;
    border-radius: var(--mk-radius-md);
    background: var(--mk-color-brand-50);
    color: var(--mk-color-brand-700);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 1rem;
}
.hub-aibar input[type="text"] {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--mk-color-text);
}
.hub-aibar input[type="text"]::placeholder { color: var(--mk-color-text-faint); }
.hub-aibar-send {
    background: var(--mk-color-brand-500);
    color: #fff;
    border: none;
    border-radius: var(--mk-radius-md);
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}
.hub-aibar-send:hover { background: var(--mk-color-brand-600); }

.hub-quickchips {
    display: flex; gap: 0.5rem; flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2.25rem;
}
.hub-quickchip {
    background: var(--mk-color-bg);
    border: 1px solid var(--mk-color-border);
    color: var(--mk-color-text-muted);
    padding: 0.4375rem 0.875rem;
    border-radius: var(--mk-radius-pill);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all 0.15s;
}
.hub-quickchip:hover {
    border-color: var(--mk-color-brand-400);
    color: var(--mk-color-brand-700);
    background: var(--mk-color-brand-50);
}

/* ---------- Widget grid ---------- */
.hub-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 1.75rem;
}
.hub-widget {
    background: var(--mk-color-bg-subtle);
    border: 1px solid var(--mk-color-border);
    border-radius: var(--mk-radius-lg);
    padding: 1.125rem 1.25rem;
}
.hub-widget-head {
    display: flex; align-items: center; gap: 0.5rem;
    margin-bottom: 0.875rem;
    color: var(--mk-color-text);
    font-weight: 600;
    font-size: 0.9375rem;
}
.hub-widget-head .hub-widget-icon {
    width: 24px; height: 24px;
    border-radius: 6px;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--mk-color-brand-50);
    color: var(--mk-color-brand-700);
    font-size: 0.75rem;
}
.hub-widget-list { display: flex; flex-direction: column; gap: 0.5rem; }
.hub-widget-li {
    display: flex; align-items: flex-start; gap: 0.5rem;
    padding: 0.4375rem 0;
    color: var(--mk-color-text);
    font-size: 0.875rem;
    border-bottom: 1px dashed var(--mk-color-border);
}
.hub-widget-li:last-child { border-bottom: none; }
.hub-widget-li .li-time {
    color: var(--mk-color-text-faint);
    font-size: 0.75rem;
    flex-shrink: 0;
}
.hub-widget-li a { color: var(--mk-color-text); text-decoration: none; }
.hub-widget-li a:hover { color: var(--mk-color-brand-600); }
.hub-widget-li .li-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--mk-color-brand-500);
    margin-top: 0.5rem; flex-shrink: 0;
}

/* ---------- Notice ---------- */
.hub-notice {
    margin-top: 1rem;
    background: var(--mk-color-bg-subtle);
    border: 1px solid var(--mk-color-border);
    border-radius: var(--mk-radius-pill);
    padding: 0.75rem 1.25rem;
    display: flex; align-items: center; gap: 1rem;
    font-size: 0.875rem;
}
.hub-notice .notice-tag {
    background: var(--mk-color-brand-50);
    color: var(--mk-color-brand-700);
    padding: 0.1875rem 0.625rem;
    border-radius: var(--mk-radius-pill);
    font-size: 0.6875rem;
    font-weight: 600;
}
.hub-notice .notice-title { color: var(--mk-color-text); font-weight: 500; }
.hub-notice .notice-date { margin-left: auto; color: var(--mk-color-text-faint); font-size: 0.75rem; }

/* ---------- Collection / document tree ---------- */
.hub-page-head {
    margin-bottom: 1.5rem;
}
.hub-breadcrumb {
    font-size: 0.8125rem;
    color: var(--mk-color-text-muted);
    margin-bottom: 0.5rem;
}
.hub-breadcrumb a { color: var(--mk-color-text-muted); text-decoration: none; }
.hub-breadcrumb a:hover { color: var(--mk-color-brand-600); }
.hub-page-head h1 {
    font-size: 1.625rem;
    font-weight: 700;
    color: var(--mk-color-text);
    letter-spacing: -0.01em;
}
.hub-page-head .desc { color: var(--mk-color-text-muted); margin-top: 0.25rem; font-size: 0.9375rem; }

.hub-doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 0.875rem;
}
.hub-doc-card {
    background: var(--mk-color-bg);
    border: 1px solid var(--mk-color-border);
    border-radius: var(--mk-radius-lg);
    padding: 1rem 1.125rem;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
    text-decoration: none;
    color: inherit;
    display: flex; flex-direction: column;
}
.hub-doc-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--mk-shadow-md);
    border-color: var(--mk-color-brand-400);
}
.hub-doc-card .doc-emoji { font-size: 1.25rem; margin-bottom: 0.5rem; }
.hub-doc-card .doc-title { font-weight: 600; color: var(--mk-color-text); margin-bottom: 0.25rem; font-size: 0.9375rem; }
.hub-doc-card .doc-snippet { font-size: 0.8125rem; color: var(--mk-color-text-muted); line-height: 1.5; flex: 1; }
.hub-doc-card .doc-meta {
    margin-top: 0.625rem;
    display: flex; gap: 0.375rem; flex-wrap: wrap;
    font-size: 0.6875rem; color: var(--mk-color-text-faint);
}
.hub-doc-card .doc-tag {
    padding: 0.125rem 0.5rem;
    border-radius: var(--mk-radius-pill);
    background: var(--mk-color-bg-muted);
    color: var(--mk-color-text-muted);
}

/* ---------- Document view ---------- */
.hub-doc-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 1.5rem;
    align-items: start;
}
.hub-doc-body {
    background: var(--mk-color-bg-subtle);
    border: 1px solid var(--mk-color-border);
    border-radius: var(--mk-radius-xl);
    padding: 2rem 2.25rem;
    min-height: 60vh;
}
.hub-doc-body h1 { font-size: 1.75rem; margin: 0 0 0.75rem; letter-spacing: -0.01em; }
.hub-doc-body h2 { font-size: 1.25rem; margin: 1.5rem 0 0.625rem; letter-spacing: -0.01em; }
.hub-doc-body h3 { font-size: 1.0625rem; margin: 1.125rem 0 0.5rem; }
.hub-doc-body p { margin-bottom: 0.875rem; color: var(--mk-color-text); font-size: 0.9375rem; line-height: 1.7; }
.hub-doc-body ul, .hub-doc-body ol { margin: 0 0 0.875rem 1.25rem; }
.hub-doc-body li { margin-bottom: 0.25rem; }
.hub-doc-body code {
    font-family: var(--mk-font-mono, ui-monospace, monospace);
    background: var(--mk-color-bg-muted);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.8125rem;
}
.hub-doc-body pre {
    background: var(--mk-color-bg-muted);
    padding: 0.875rem 1rem;
    border-radius: var(--mk-radius-md);
    overflow-x: auto;
    margin: 0 0 0.875rem;
    border: 1px solid var(--mk-color-border);
}
.hub-doc-body pre code { background: none; padding: 0; }
.hub-doc-body blockquote {
    border-left: 3px solid var(--mk-color-brand-400);
    padding: 0.25rem 0 0.25rem 0.875rem;
    color: var(--mk-color-text-muted);
    margin: 0 0 0.875rem;
}

.hub-aside {
    display: flex; flex-direction: column;
    gap: 0.875rem;
    position: sticky; top: 80px;
}
.hub-aipanel {
    background: var(--mk-color-bg-subtle);
    border: 1px solid var(--mk-color-border);
    border-radius: var(--mk-radius-lg);
    padding: 1rem 1.125rem;
}
.hub-aipanel h3 {
    font-size: 0.875rem;
    margin-bottom: 0.625rem;
    color: var(--mk-color-text);
    display: flex; align-items: center; gap: 0.375rem;
}
.hub-aipanel h3::before {
    content: "✨";
    font-size: 0.875rem;
}
.hub-ai-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 0.375rem; }
.hub-ai-btn {
    background: var(--mk-color-bg);
    border: 1px solid var(--mk-color-border);
    color: var(--mk-color-text);
    padding: 0.4375rem 0.625rem;
    border-radius: var(--mk-radius-md);
    font-size: 0.8125rem;
    cursor: pointer;
    text-align: left;
    transition: all 0.15s;
}
.hub-ai-btn:hover {
    border-color: var(--mk-color-brand-400);
    color: var(--mk-color-brand-700);
    background: var(--mk-color-brand-50);
}
.hub-ai-output {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: var(--mk-color-bg);
    border: 1px dashed var(--mk-color-border);
    border-radius: var(--mk-radius-md);
    font-size: 0.8125rem;
    color: var(--mk-color-text-muted);
    line-height: 1.55;
    min-height: 50px;
    white-space: pre-wrap;
}
.hub-aside .meta-list { list-style: none; }
.hub-aside .meta-list li {
    display: flex; justify-content: space-between;
    padding: 0.3125rem 0;
    border-bottom: 1px dashed var(--mk-color-border);
    font-size: 0.8125rem;
    color: var(--mk-color-text-muted);
}
.hub-aside .meta-list li:last-child { border-bottom: none; }
.hub-aside .meta-list li b { color: var(--mk-color-text); font-weight: 500; }

/* ---------- Search modal ---------- */
.hub-search-modal[hidden] { display: none !important; }
.hub-search-modal {
    position: fixed; inset: 0;
    z-index: var(--mk-z-modal, 1000);
    display: flex; align-items: flex-start; justify-content: center;
    padding-top: 12vh;
}
.hub-search-backdrop {
    position: absolute; inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
}
.hub-search-panel {
    position: relative;
    width: min(640px, 92vw);
    background: var(--mk-color-bg);
    border: 1px solid var(--mk-color-border);
    border-radius: var(--mk-radius-xl);
    box-shadow: var(--mk-shadow-lg);
    overflow: hidden;
}
.hub-search-input-row {
    display: flex; align-items: center; gap: 0.625rem;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--mk-color-border);
    color: var(--mk-color-text-muted);
}
.hub-search-input-row input {
    flex: 1; border: none; outline: none; background: transparent;
    font-size: 1rem; font-family: inherit;
    color: var(--mk-color-text);
}
.hub-search-close {
    background: none; border: none; cursor: pointer;
    color: var(--mk-color-text-muted);
    width: 28px; height: 28px; border-radius: 6px;
}
.hub-search-close:hover { background: var(--mk-color-bg-muted); color: var(--mk-color-text); }
.hub-search-results {
    max-height: 50vh;
    overflow-y: auto;
    padding: 0.375rem;
}
.hub-search-result {
    display: block;
    padding: 0.625rem 0.75rem;
    border-radius: var(--mk-radius-md);
    text-decoration: none;
    color: var(--mk-color-text);
    cursor: pointer;
}
.hub-search-result:hover { background: var(--mk-color-bg-muted); }
.hub-search-result .r-title { font-weight: 600; font-size: 0.9375rem; margin-bottom: 0.125rem; }
.hub-search-result .r-meta { font-size: 0.75rem; color: var(--mk-color-text-faint); }
.hub-search-result .r-snippet { font-size: 0.8125rem; color: var(--mk-color-text-muted); margin-top: 0.1875rem; }
.hub-search-empty {
    padding: 1.5rem 1rem;
    text-align: center;
    color: var(--mk-color-text-faint);
    font-size: 0.875rem;
}

/* ---------- Empty state ---------- */
.hub-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--mk-color-text-muted);
}
.hub-empty .e-emoji { font-size: 2.5rem; margin-bottom: 0.75rem; }
.hub-empty h3 { font-size: 1.0625rem; color: var(--mk-color-text); margin-bottom: 0.375rem; }
.hub-empty p { font-size: 0.875rem; }

/* ---------- Responsive ---------- */
@media (max-width: 1023px) {
    .hub-doc-layout { grid-template-columns: 1fr; }
    .hub-aside { position: static; }
}
@media (max-width: 767px) {
    .hub-sidebar {
        position: fixed; inset: 56px 0 0 0;
        z-index: 50;
        width: min(280px, 86vw);
        transform: translateX(-100%);
        transition: transform 0.2s ease;
        box-shadow: var(--mk-shadow-lg);
    }
    .hub-sidebar.open { transform: translateX(0); }
    .hub-mobile-toggle { display: inline-flex; align-items: center; justify-content: center; }
    .hub-view { padding: 1.25rem 1rem 3rem; }
    .hub-doc-body { padding: 1.25rem 1.125rem; }
    .top-nav-container { padding: 0 0.875rem; }
    .nav-links { gap: 0.25rem; }
}

</* ====================================================================== */
/* RAG AI bridge — citations, streaming answer, feedback (Task #14, P3)   */
/* ====================================================================== */
.hub-aibar-answer {
    margin-top: 0.75rem;
    padding: 0.875rem 1rem;
    border-radius: var(--mk-radius-lg, 16px);
    background: var(--mk-color-surface, #fff);
    border: 1px solid var(--mk-color-border, #e7e3da);
    font-size: 0.9375rem;
    line-height: 1.55;
    color: var(--mk-color-text, #2a261f);
}
.hub-aibar-answer[hidden] { display: none; }

.hub-ai-confidence {
    display: inline-flex; align-items: center; gap: 0.375rem;
    margin-bottom: 0.625rem;
    padding: 0.3125rem 0.6875rem;
    border-radius: 999px;
    border: 1px solid var(--mk-color-border, #e7e3da);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.3;
    background: var(--mk-color-bg-alt, #f4efe5);
    color: var(--mk-color-text, #2a261f);
}
.hub-ai-confidence[hidden] { display: none; }
.hub-ai-confidence .hub-conf-icon { font-size: 0.875rem; line-height: 1; }
.hub-ai-confidence--none {
    background: #fdecea;
    border-color: #f5c2bd;
    color: #9a2a1f;
}
.hub-ai-confidence--weak {
    background: #fff7d6;
    border-color: #f1d97a;
    color: #6b5400;
}
.hub-ai-confidence .hub-conf-cta {
    margin-left: 0.375rem;
    background: #fff;
    border: 1px solid currentColor;
    color: inherit;
    border-radius: 999px;
    padding: 0.1875rem 0.625rem;
    font: inherit;
    font-size: 0.6875rem;
    font-weight: 600;
    cursor: pointer;
    line-height: 1.2;
    transition: background 0.15s, color 0.15s;
}
.hub-ai-confidence .hub-conf-cta:hover {
    background: #9a2a1f;
    color: #fff;
}

/* 약한 근거 답변 — 흐림 오버레이 (Task #37) */
.hub-ai-stream--low .hub-ai-confidence {
    box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.18);
}
.hub-ai-stream--low-none .hub-ai-confidence {
    box-shadow: 0 0 0 2px rgba(154, 42, 31, 0.22);
}
.hub-ai-answer-wrap {
    position: relative;
}
.hub-ai-stream--blurred .hub-ai-answer {
    filter: blur(6px);
    user-select: none;
    pointer-events: none;
    transition: filter 0.18s ease;
}
.hub-ai-low-overlay {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
    background: rgba(255, 247, 214, 0.78);
    border: 1px solid #f1d97a;
    border-radius: var(--mk-radius-md, 12px);
    backdrop-filter: saturate(120%);
}
.hub-ai-low-overlay[hidden] { display: none; }
.hub-ai-stream--low-none .hub-ai-low-overlay {
    background: rgba(253, 236, 234, 0.85);
    border-color: #f5c2bd;
}
.hub-ai-low-overlay-inner {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
    max-width: 36rem;
}
.hub-ai-low-icon {
    font-size: 1.25rem;
    line-height: 1;
}
.hub-ai-low-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    color: #6b5400;
    font-size: 0.8125rem;
    line-height: 1.35;
}
.hub-ai-stream--low-none .hub-ai-low-text { color: #9a2a1f; }
.hub-ai-low-text strong {
    font-size: 0.9375rem;
    font-weight: 700;
}
.hub-ai-low-sub {
    font-weight: 500;
    opacity: 0.85;
}
.hub-ai-low-sub:empty { display: none; }
.hub-ai-low-reveal {
    appearance: none;
    background: #fff;
    border: 1px solid currentColor;
    color: inherit;
    border-radius: 999px;
    padding: 0.375rem 0.875rem;
    font: inherit;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    line-height: 1.2;
    transition: background 0.15s, color 0.15s;
}
.hub-ai-stream--low-weak .hub-ai-low-reveal { color: #6b5400; }
.hub-ai-stream--low-weak .hub-ai-low-reveal:hover { background: #6b5400; color: #fff7d6; }
.hub-ai-stream--low-none .hub-ai-low-reveal { color: #9a2a1f; }
.hub-ai-stream--low-none .hub-ai-low-reveal:hover { background: #9a2a1f; color: #fff; }
@media (prefers-reduced-motion: reduce) {
    .hub-ai-stream--blurred .hub-ai-answer { transition: none; }
}
[data-reduce-motion="true"] .hub-ai-stream--blurred .hub-ai-answer { transition: none; }

.hub-ai-citations {
    display: flex; flex-wrap: wrap; gap: 0.375rem;
    margin-bottom: 0.625rem;
    padding-bottom: 0.625rem;
    border-bottom: 1px dashed var(--mk-color-border, #e7e3da);
}
.hub-ai-citations[hidden] { display: none; }
.hub-ai-citations .cite-label {
    width: 100%;
    font-size: 0.75rem;
    color: var(--mk-color-text-muted, #7a7268);
    margin-bottom: 0.25rem;
    letter-spacing: 0.02em;
}
.hub-cite {
    display: inline-flex; align-items: center; gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    background: var(--mk-color-bg-alt, #f4efe5);
    border: 1px solid var(--mk-color-border, #e7e3da);
    border-radius: 999px;
    font-size: 0.75rem;
    color: inherit; text-decoration: none;
    transition: background 0.15s ease, transform 0.1s ease;
    max-width: 100%;
}
.hub-cite:hover {
    background: var(--mk-color-accent-soft, #f7e3d8);
    transform: translateY(-1px);
}
.hub-cite .cite-num   { color: var(--mk-color-accent, #c96442); font-weight: 600; }
.hub-cite .cite-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 18ch; }
.hub-cite .cite-score { color: var(--mk-color-text-muted, #7a7268); font-variant-numeric: tabular-nums; }

.hub-ai-answer { white-space: normal; word-break: break-word; }
.hub-ai-answer .cite-ref {
    display: inline-block;
    margin: 0 0.125rem;
    padding: 0 0.25rem;
    font-size: 0.75em;
    color: var(--mk-color-accent, #c96442);
    background: var(--mk-color-accent-soft, #f7e3d8);
    border-radius: 4px;
    text-decoration: none;
    vertical-align: 1px;
    font-weight: 600;
}
.hub-ai-answer .cite-ref:hover { text-decoration: underline; }
.hub-ai-answer .cite-ref-missing {
    color: var(--mk-color-text-muted, #7a7268);
    background: transparent;
    cursor: not-allowed;
}

.hub-ai-dots {
    display: inline-block;
    animation: hubDots 1.2s steps(4, end) infinite;
}
@keyframes hubDots {
    0%   { opacity: 0.3; }
    50%  { opacity: 1; }
    100% { opacity: 0.3; }
}

.hub-ai-feedback {
    display: flex; align-items: center; gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.625rem;
    border-top: 1px dashed var(--mk-color-border, #e7e3da);
    font-size: 0.8125rem;
    color: var(--mk-color-text-muted, #7a7268);
}
.hub-ai-feedback[hidden] { display: none; }
.hub-fb {
    background: transparent;
    border: 1px solid var(--mk-color-border, #e7e3da);
    border-radius: 999px;
    width: 28px; height: 28px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease;
    line-height: 1;
}
.hub-fb:hover:not(:disabled) {
    background: var(--mk-color-accent-soft, #f7e3d8);
    transform: scale(1.05);
}
.hub-fb:disabled { opacity: 0.5; cursor: default; }
.hub-fb-thanks { color: var(--mk-color-accent, #c96442); }

/* Output container in the doc-side AI panel inherits the same answer styling. */
.hub-ai-output {
    white-space: normal;
    word-break: break-word;
}

/* ---------- Phase 2: action buttons, edit form, trash, mine ---------- */
.hub-page-actions {
    display: flex; flex-wrap: wrap; gap: 0.5rem;
    margin-top: 0.875rem;
}
.hub-btn-primary, .hub-btn-secondary, .hub-btn-danger, .hub-btn-icon {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 0.375rem;
    padding: 0.4375rem 0.875rem;
    border-radius: var(--mk-radius-md, 12px);
    font-size: 0.8125rem;
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.hub-btn-primary {
    background: var(--mk-color-coral, #c96442);
    color: #fff;
}
.hub-btn-primary:hover { filter: brightness(0.95); }
.hub-btn-secondary {
    background: var(--mk-color-surface, #fff);
    color: var(--mk-color-text);
    border-color: var(--mk-color-border, #e5e3dc);
}
.hub-btn-secondary:hover { background: var(--mk-color-bg-soft, #f3f1ea); }
.hub-btn-danger {
    background: transparent;
    color: #c0392b;
    border-color: rgba(192, 57, 43, 0.35);
}
.hub-btn-danger:hover { background: rgba(192, 57, 43, 0.08); }
.hub-btn-icon {
    width: 2rem; height: 2rem; padding: 0;
    background: var(--mk-color-surface, #fff);
    border-color: var(--mk-color-border, #e5e3dc);
    font-size: 1rem;
}
.hub-btn-icon:hover { background: var(--mk-color-bg-soft, #f3f1ea); }

.hub-side-empty {
    padding: 0.75rem 0.875rem;
    font-size: 0.75rem;
    color: var(--mk-color-text-faint);
    text-align: center;
    line-height: 1.4;
}

/* Edit form */
.hub-doc-edit { display: flex; flex-direction: column; gap: 1rem; }
.hub-field { display: flex; flex-direction: column; gap: 0.375rem; }
.hub-field > span { font-size: 0.8125rem; color: var(--mk-color-text-muted); font-weight: 600; }
.hub-field input,
.hub-field textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--mk-color-border, #e5e3dc);
    border-radius: var(--mk-radius-md, 12px);
    background: var(--mk-color-surface, #fff);
    color: var(--mk-color-text);
    font-family: inherit;
    font-size: 0.9375rem;
    line-height: 1.5;
}
.hub-field textarea {
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.875rem;
    resize: vertical;
    min-height: 14rem;
}
.hub-field input:focus, .hub-field textarea:focus {
    outline: 2px solid var(--mk-color-coral, #c96442);
    outline-offset: 1px;
    border-color: transparent;
}
.hub-field-row { display: flex; gap: 0.75rem; }
.hub-field-emoji { width: 5.5rem; }
.hub-field-grow { flex: 1 1 auto; }
.hub-form-actions { display: flex; gap: 0.5rem; }

/* Doc card favorite badge */
.doc-fav { margin-left: 0.25rem; font-size: 0.875rem; }

/* Trash list */
.hub-trash-list { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 1rem; }
.hub-trash-row {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    background: var(--mk-color-surface, #fff);
    border: 1px solid var(--mk-color-border, #e5e3dc);
    border-radius: var(--mk-radius-md, 12px);
}
.hub-trash-info {
    display: flex; align-items: center; gap: 0.625rem;
    flex: 1 1 auto;
    text-decoration: none; color: inherit;
    min-width: 0;
}
.hub-trash-info .r-emoji { font-size: 1.125rem; }
.hub-trash-info .r-title { font-weight: 600; flex: 0 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hub-trash-info .r-meta { font-size: 0.75rem; color: var(--mk-color-text-faint); margin-left: auto; }
.hub-trash-actions { display: flex; gap: 0.375rem; }

/* Mine grid */
.hub-mine-grid {
    display: grid; gap: 0.875rem;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    margin-top: 1rem;
}
.hub-mine-card {
    display: flex; flex-direction: column; gap: 0.375rem;
    padding: 1rem 1rem 0.875rem;
    background: var(--mk-color-surface, #fff);
    border: 1px solid var(--mk-color-border, #e5e3dc);
    border-radius: var(--mk-radius-lg, 16px);
    text-decoration: none; color: inherit;
    transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.hub-mine-card:hover { box-shadow: var(--mk-shadow-sm, 0 1px 3px rgba(0,0,0,0.06)); transform: translateY(-1px); }
.hub-mine-card .m-emoji { font-size: 1.5rem; }
.hub-mine-card .m-name { font-weight: 600; font-size: 0.9375rem; }
.hub-mine-card .m-meta { font-size: 0.75rem; color: var(--mk-color-text-faint); }