/* ══════════════════════════════════════════════════════════════════════════
   eCFR Reviewer and Citation Retriever — style.css  v2.3 (light theme)
   High-contrast government document aesthetic
   ══════════════════════════════════════════════════════════════════════════ */

/* ── Variables ──────────────────────────────────────────────────────────── */
:root {
    --bg:           #f5f6f8;
    --surface:      #ffffff;
    --surface-2:    #eef0f4;
    --border:       #c2c8d4;
    --border-strong:#8e96a8;

    --accent:       #1a3f6f;        /* deep navy — strong, readable */
    --accent-bright:#1d56a0;
    --accent-dim:   rgba(26, 63, 111, 0.08);
    --accent-mid:   rgba(26, 63, 111, 0.22);

    --text:         #111827;        /* near-black — maximum readability */
    --text-muted:   #374151;
    --text-dim:     #6b7280;

    --green:        #166534;        /* dark green — WCAG AA on white */
    --green-bg:     #dcfce7;
    --green-border: #86efac;

    --red:          #991b1b;        /* dark red — WCAG AA on white */
    --red-bg:       #fee2e2;
    --red-border:   #fca5a5;

    --amber:        #92400e;
    --amber-bg:     #fef3c7;
    --amber-border: #fcd34d;

    --blue:         #1e40af;
    --blue-bg:      rgba(30, 64, 175, 0.08);
    --blue-border:  rgba(30, 64, 175, 0.3);

    --font-mono:    'IBM Plex Mono', monospace;

    --sidebar-w:    320px;
}

/* ── Reset & Base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Accessibility helpers ──────────────────────────────────────────────── */
.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    margin: -1px; padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Visible keyboard-focus indicator for interactive elements */
a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--accent-bright);
    outline-offset: 2px;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 14px;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
}

a { color: var(--accent-bright); text-decoration: underline; }
a:hover { color: var(--accent); }

/* ── Header ─────────────────────────────────────────────────────────────── */
.app-header {
    background: var(--accent);
    border-bottom: 3px solid #0f2a4a;
    padding: 14px 28px;
    display: flex;
    align-items: center;
    gap: 14px;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

/* Subtle ruled-line texture on header */
.app-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        90deg,
        transparent 0px,
        transparent 59px,
        rgba(255,255,255,0.04) 59px,
        rgba(255,255,255,0.04) 60px
    );
    pointer-events: none;
}

.header-logo {
    width: 40px; height: 40px;
    border-radius: 6px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; z-index: 1;
}
.header-logo svg { width: 20px; height: 20px; fill: #ffffff; }

.header-text { z-index: 1; }

.header-title {
    font-family: 'Bebas Neue', cursive;
    font-size: 26px;
    letter-spacing: 3px;
    line-height: 1;
    color: #ffffff;
}
.header-title span { color: #93c5fd; }   /* sky blue accent on navy */

.header-subtitle {
    font-size: 10px;
    color: rgba(255,255,255,0.6);
    letter-spacing: 1.2px;
    text-transform: uppercase;
    margin-top: 3px;
}

/* ── API Status ──────────────────────────────────────────────────────────  */
.api-status {
    margin-left: auto;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 11px;
    color: rgba(255,255,255,0.75);
    letter-spacing: 0.4px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 20px;
    padding: 5px 12px;
}
.api-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    flex-shrink: 0;
    transition: background 0.3s;
}
.api-dot.ok      { background: #86efac; box-shadow: 0 0 6px rgba(134,239,172,0.6); }
.api-dot.loading { background: #fcd34d; animation: pulse-dot 1s ease-in-out infinite; }
.api-dot.error   { background: #fca5a5; }
@keyframes pulse-dot { 0%,100%{opacity:1} 50%{opacity:0.35} }

/* ── Layout ─────────────────────────────────────────────────────────────── */
.app-body {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────────────────────────  */
.sidebar {
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    overflow-y: auto;
    box-shadow: 2px 0 8px rgba(0,0,0,0.04);
}

.panel-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.8px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 10px;
    padding-bottom: 7px;
    border-bottom: 2px solid var(--accent);
}

/* ── Mode Toggle ─────────────────────────────────────────────────────────  */
.mode-toggle {
    display: flex;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 7px;
    overflow: hidden;
}
.mode-toggle button {
    flex: 1;
    padding: 9px 4px;
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 12px;
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s;
    letter-spacing: 0.4px;
}
.mode-toggle button:not(:last-child) { border-right: 1px solid var(--border); }
.mode-toggle button.active {
    background: var(--accent);
    color: #ffffff;
}
.mode-toggle button:hover:not(.active) {
    background: var(--accent-dim);
    color: var(--accent);
}

/* ── Form Groups ─────────────────────────────────────────────────────────  */
.form-group { display: flex; flex-direction: column; gap: 5px; margin-bottom: 12px; }

label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ── Live badge ──────────────────────────────────────────────────────────  */
.live-badge {
    font-size: 9px; font-weight: 700; letter-spacing: 0.8px; text-transform: uppercase;
    color: var(--green); background: var(--green-bg);
    border: 1px solid var(--green-border);
    border-radius: 3px; padding: 1px 5px;
}

/* ── Select Wrapper ──────────────────────────────────────────────────────  */
.select-wrap { position: relative; display: flex; align-items: center; overflow: hidden; }
.select-wrap::after {
    content: '▾';
    position: absolute;
    right: 10px;
    color: var(--border-strong);
    font-size: 12px;
    pointer-events: none;
}
.select-wrap:has(select:not(:disabled))::after { color: var(--accent); }

select {
    width: 100%;
    min-width: 0;
    appearance: none;
    -webkit-appearance: none;
    background: var(--surface);
    border: 1.5px solid var(--border);
    color: var(--text);
    padding: 8px 28px 8px 10px;
    border-radius: 5px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    cursor: pointer;
    transition: border-color 0.18s, box-shadow 0.18s;
    line-height: 1.4;
}
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}
select:disabled {
    color: var(--text-dim);
    cursor: not-allowed;
    border-style: dashed;
    background: var(--surface-2);
    opacity: 0.7;
}
select option { background: #ffffff; color: var(--text); }

/* ── Per-field spinner ───────────────────────────────────────────────────  */
.sel-spinner {
    position: absolute;
    right: 28px;
    width: 13px; height: 13px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    pointer-events: none;
}

/* ── Latest date tag ─────────────────────────────────────────────────────  */
.latest-tag {
    display: none;
    font-size: 11px;
    font-weight: 600;
    color: var(--green);
    letter-spacing: 0.2px;
    padding: 2px 0;
}

/* ── Date badge (diff) ───────────────────────────────────────────────────  */
.date-badge {
    font-size: 9px; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase;
    border-radius: 3px; padding: 1px 5px;
}
.date-a { color: var(--red);  background: var(--red-bg);   border: 1px solid var(--red-border); }
.date-b { color: var(--blue); background: var(--blue-bg);  border: 1px solid var(--blue-border); }

.diff-dates-row { display: flex; gap: 10px; }
.diff-dates-row .form-group { flex: 1; }

/* ── Buttons ─────────────────────────────────────────────────────────────  */
.btn {
    width: 100%;
    padding: 10px;
    background: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 700;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.18s, transform 0.1s;
    margin-bottom: 8px;
}
.btn:hover  { background: var(--accent-bright); }
.btn:active { transform: scale(0.985); }

.field-hint { font-size: 11px; color: var(--text-dim); line-height: 1.6; }
.field-hint a { color: var(--accent-bright); }

/* ── History ─────────────────────────────────────────────────────────────  */
.history-panel { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.clear-history-btn {
    background: none; border: none; color: var(--text-dim); font-size: 10px;
    cursor: pointer; font-family: 'IBM Plex Sans', sans-serif; letter-spacing: 0.5px;
    text-transform: uppercase; padding: 2px 4px; border-radius: 3px; transition: color 0.15s;
}
.clear-history-btn:hover { color: var(--red); }

.history-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 5px; }

.history-item {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 10px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.18s, background 0.18s;
}
.history-item:hover { border-color: var(--accent); background: var(--accent-dim); }
.history-item-text { flex: 1; min-width: 0; }
.history-item-title {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--text);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.history-item-date { font-size: 10px; color: var(--text-dim); margin-top: 2px; }
.history-delete {
    background: none; border: none; color: var(--text-dim); cursor: pointer;
    font-size: 16px; line-height: 1; padding: 1px 4px; border-radius: 3px;
    flex-shrink: 0; transition: all 0.15s;
}
.history-delete:hover { color: var(--red); background: var(--red-bg); }
.history-empty { font-size: 12px; color: var(--text-dim); text-align: center; padding: 20px; font-style: italic; }

/* ── Main Content ────────────────────────────────────────────────────────  */
.main-content { padding: 26px 30px; overflow-y: auto; }

/* ── Loading Bar ─────────────────────────────────────────────────────────  */
.loading-bar { display: none; height: 3px; background: var(--border); border-radius: 2px; overflow: hidden; margin-bottom: 20px; }
.loading-bar.active { display: block; }
.loading-bar::after {
    content: ''; display: block; height: 100%; width: 28%;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    animation: loadpulse 1.4s ease-in-out infinite;
}
@keyframes loadpulse { 0%{transform:translateX(-150%)} 100%{transform:translateX(500%)} }

/* ── Spinner ─────────────────────────────────────────────────────────────  */
.spinner-wrap {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 14px; min-height: 300px; color: var(--text-dim); font-size: 13px;
}
.spinner {
    width: 36px; height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Error Banner ────────────────────────────────────────────────────────  */
.error-banner {
    display: none;
    background: var(--red-bg);
    border: 1px solid var(--red-border);
    border-left: 4px solid var(--red);
    border-radius: 6px;
    padding: 12px 16px;
    margin-bottom: 20px;
    font-size: 13px;
    color: var(--red);
    line-height: 1.5;
}
.error-banner.active { display: block; }
.error-icon { margin-right: 6px; }
/* Fallback link offered when content cannot be rendered in-app */
.error-link {
    display: inline-block; margin-left: 4px;
    color: var(--red); font-weight: 600; text-decoration: underline;
    text-underline-offset: 2px;
}
.error-link:hover { color: var(--accent); }

/* ── Placeholder ─────────────────────────────────────────────────────────  */
.results-placeholder {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    min-height: 420px; color: var(--text-dim); text-align: center; gap: 14px;
}
.results-placeholder svg { opacity: 0.2; fill: var(--accent); }
.results-placeholder p { font-size: 14px; line-height: 1.7; color: var(--text-dim); }
.placeholder-tips { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.tip { font-size: 12px; color: var(--text-dim); display: flex; align-items: center; gap: 8px; justify-content: center; }
.tip-mode {
    background: var(--accent-dim); color: var(--accent);
    border: 1px solid var(--accent-mid);
    border-radius: 3px; padding: 1px 8px;
    font-size: 11px; font-weight: 700; letter-spacing: 0.5px; white-space: nowrap;
}

/* ── Result Cards ────────────────────────────────────────────────────────  */
/* Shortcut bar above the Citations card in the reading pane */
.section-actions {
    display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
    margin-bottom: 14px;
}
.section-action-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 13px; border-radius: 6px;
    border: 1px solid var(--accent-mid);
    background: var(--surface); color: var(--accent);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 11px; font-weight: 600; letter-spacing: 0.06em;
    text-transform: uppercase; cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}
.section-action-btn:hover  { background: var(--accent-dim); border-color: var(--accent); }
.section-action-btn:active { transform: scale(0.985); }
.section-actions-context {
    margin-left: auto;
    font-family: var(--font-mono); font-size: 11px; color: var(--text-dim);
}

/* Paragraph filter, sitting inline with the shortcut buttons */
.para-filter { display: inline-flex; align-items: center; gap: 7px; }
.para-filter-label {
    font-size: 10px; font-weight: 700; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--text-dim); white-space: nowrap;
}
.para-filter select {
    width: auto; min-width: 165px;
    padding: 6px 26px 6px 9px; font-size: 11px;
}

.result-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 18px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.result-card-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 16px;
    background: var(--accent);
    border-bottom: 1px solid var(--border);
}
.result-card-title {
    font-size: 10px; font-weight: 700; letter-spacing: 1.8px;
    text-transform: uppercase; color: #ffffff;
}
.copy-btn {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.35);
    color: #ffffff;
    padding: 3px 10px; border-radius: 4px;
    font-size: 11px; font-family: 'IBM Plex Sans', sans-serif;
    cursor: pointer; transition: all 0.15s;
}
.copy-btn:hover  { background: rgba(255,255,255,0.25); }
.copy-btn.copied { border-color: var(--green-border); color: var(--green-bg); }
.export-csv-btn  { background: rgba(52,211,153,0.12); border-color: rgba(52,211,153,0.45); color: #6ee7b7; }
.export-csv-btn:hover  { background: rgba(52,211,153,0.22); }
.export-word-btn { background: rgba(96,165,250,0.12); border-color: rgba(96,165,250,0.45); color: #93c5fd; }
.export-word-btn:hover { background: rgba(96,165,250,0.22); }
.para-block.hidden { display: none; }

.xref-list { display: flex; flex-wrap: wrap; gap: 8px; }
.xref-chip {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 4px 10px; border-radius: 4px; font-size: 12px;
    font-family: 'IBM Plex Mono', monospace; cursor: pointer; text-decoration: none;
    border: 1px solid rgba(109,40,217,0.35);
    background: rgba(109,40,217,0.08); color: #6d28d9;
    transition: background 0.15s;
}
.xref-chip:hover { background: rgba(109,40,217,0.16); }
.xref-chip.xref-part {
    border-color: var(--amber-border);
    background: var(--amber-bg); color: var(--amber);
}
.xref-chip.xref-part:hover { background: #fde9b8; }
.xref-empty { color: var(--text-dim); font-size: 13px; font-style: italic; }

.standard-chip {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 4px 10px; border-radius: 4px; font-size: 12px;
    font-family: 'IBM Plex Mono', monospace;
    border: 1px solid var(--blue-border);
    background: var(--blue-bg); color: var(--blue);
    cursor: pointer; transition: background 0.15s;
}
.standard-chip:hover { background: var(--accent-mid); }

/* Small "jump to reference in text" icon button next to a cross-ref chip */
.xref-jump {
    display: inline-flex; align-items: center; justify-content: center;
    width: 24px; height: 24px; padding: 0; margin-left: -4px;
    border-radius: 4px; border: 1px solid var(--border);
    background: var(--surface); color: var(--text-dim);
    font-size: 13px; line-height: 1; cursor: pointer;
    transition: all 0.15s;
}
.xref-jump:hover { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

.result-card-body { padding: 16px; }

/* ── Citation display ────────────────────────────────────────────────────  */
.citation-text {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px;
    color: var(--text-muted); line-height: 1.7; margin-bottom: 12px;
    background: var(--surface-2); border: 1px solid var(--border);
    border-radius: 5px; padding: 10px 12px;
}
.link-row { display: flex; flex-wrap: wrap; gap: 7px; }
.fr-link {
    display: inline-flex; align-items: center; padding: 5px 11px;
    background: var(--accent-dim); border: 1.5px solid var(--accent-mid);
    border-radius: 4px; color: var(--accent);
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; font-weight: 600;
    text-decoration: none; transition: all 0.15s;
}
.fr-link:hover { background: var(--accent-mid); }
.pdf-link {
    display: inline-flex; align-items: center; gap: 5px; padding: 5px 11px;
    background: var(--red-bg); border: 1.5px solid var(--red-border);
    border-radius: 4px; color: var(--red);
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; font-weight: 600;
    text-decoration: none; transition: all 0.15s;
}
.pdf-link:hover { background: #fecaca; }

.section-heading {
    font-family: 'IBM Plex Mono', monospace; font-size: 14px; font-weight: 500;
    color: var(--text); line-height: 1.6;
}

/* ── Paragraph hierarchy ─────────────────────────────────────────────────  */
.para-block { margin-bottom: 10px; }
.para-block:last-child { margin-bottom: 0; }

.section-para {
    font-size: 13px; line-height: 1.8; color: var(--text-muted);
    padding: 10px 14px;
    background: var(--surface-2);
    border-left: 3px solid var(--accent);
    border-radius: 0 5px 5px 0;
}

/* Nested subsections — lighter visual weight so top-level divisions stand out */
.para-block[data-level="2"] .section-para,
.para-block[data-level="3"] .section-para,
.para-block[data-level="4"] .section-para,
.para-block[data-level="5"] .section-para,
.para-block[data-level="6"] .section-para {
    background: transparent;
    border-left: 2px solid var(--border);
    border-radius: 0;
    padding: 6px 12px;
}

/* Bolded leading designator, e.g. (a), (1), (i) */
.para-desig {
    font-weight: 700;
    color: var(--accent);
    font-family: 'IBM Plex Mono', monospace;
    margin-right: 4px;
}
.para-block[data-level="2"] .para-desig,
.para-block[data-level="3"] .para-desig,
.para-block[data-level="4"] .para-desig,
.para-block[data-level="5"] .para-desig,
.para-block[data-level="6"] .para-desig {
    color: var(--text-muted);
}

/* ── Part Browser ────────────────────────────────────────────────────────  */
.part-header-desc {
    font-size: 13px; color: var(--text-muted); margin-bottom: 14px;
    padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.part-tree { display: flex; flex-direction: column; gap: 4px; max-height: 60vh; overflow-y: auto; }
.part-item {
    display: flex; align-items: baseline; gap: 8px; padding: 7px 10px;
    background: var(--surface-2); border: 1px solid var(--border);
    border-radius: 5px; transition: all 0.15s;
}
.part-item:hover { border-color: var(--accent); background: var(--accent-dim); }
.part-item:hover .part-load { color: var(--accent); font-weight: 700; }
.part-num { font-family: 'IBM Plex Mono', monospace; font-size: 12px; font-weight: 700; color: var(--accent); flex-shrink: 0; min-width: 52px; }
.part-desc { font-size: 12px; color: var(--text-muted); flex: 1; line-height: 1.4; }
.part-load { font-size: 10px; color: var(--text-dim); flex-shrink: 0; margin-left: auto; }

/* Appendix rows in the part browser */
.part-item-appendix {
    border-left: 3px solid var(--amber-border);
    background: var(--amber-bg);
}
.part-item-appendix .part-num { color: var(--amber); }
.part-item-appendix:hover { border-left-color: var(--amber); border-color: var(--amber-border); background: #fde9b8; }

/* Subject-group rows: headings only, no citation number to show */
.part-item-group,
.part-item-group:hover {
    background: transparent;
    border: none;
    border-left: 2px solid var(--border);
    border-radius: 0;
    padding: 4px 0 4px 10px;
}
.part-item-group .part-desc {
    font-family: var(--font-mono);
    font-size: 11px; font-weight: 600; letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.part-item:hover .part-load { color: var(--accent); font-weight: 700; }

/* ── Diff View ───────────────────────────────────────────────────────────  */
.diff-stats {
    display: flex; flex-wrap: wrap; gap: 14px; padding: 10px 14px;
    background: var(--surface-2); border: 1px solid var(--border);
    border-radius: 6px; margin-bottom: 14px;
    font-size: 12px; font-family: 'IBM Plex Mono', monospace; font-weight: 600;
}
.stat-add { color: var(--green); }
.stat-del { color: var(--red); }
.stat-same { color: var(--text-dim); }
.stat-identical { color: var(--green); }

.diff-cita-block {
    font-size: 12px; margin-bottom: 14px; padding: 10px 14px;
    background: var(--surface-2); border: 1px solid var(--border);
    border-radius: 6px; line-height: 1.6;
}
.diff-no-change   { color: var(--green); font-weight: 600; }
.diff-cita-changed{ color: var(--red); font-weight: 600; margin-bottom: 6px; }
.diff-cita-detail { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--text-muted); margin-top: 4px; }

.diff-legend { display: flex; gap: 14px; margin-bottom: 12px; font-size: 11px; font-weight: 600; }
.legend-add  { color: var(--green); }
.legend-del  { color: var(--red); }
.legend-same { color: var(--text-dim); }

.diff-container { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.diff-pane-label {
    padding: 8px 12px;
    background: var(--accent);
    color: #ffffff;
    border-radius: 6px 6px 0 0;
    font-size: 12px; font-family: 'IBM Plex Mono', monospace; font-weight: 500;
}
.diff-pane-body {
    padding: 14px; background: var(--surface);
    border: 1px solid var(--border); border-top: none;
    border-radius: 0 0 6px 6px;
    font-size: 13px; font-family: 'IBM Plex Mono', monospace;
    line-height: 1.8; min-height: 180px; word-break: break-word;
}

.diff-same { color: var(--text-dim); }
.diff-add  { background: var(--green-bg); color: var(--green); border-radius: 2px; padding: 0 1px; font-weight: 600; }
.diff-del  { background: var(--red-bg);   color: var(--red);   border-radius: 2px; padding: 0 1px; font-weight: 600; text-decoration: line-through; }

/* ── Toast ───────────────────────────────────────────────────────────────  */
.toast {
    position: fixed; bottom: 22px; right: 22px;
    background: var(--accent); color: #ffffff;
    padding: 9px 16px; border-radius: 6px; font-size: 13px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transform: translateY(60px); opacity: 0;
    transition: transform 0.28s ease, opacity 0.28s ease;
    z-index: 1000; pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* ── Scrollbar ───────────────────────────────────────────────────────────  */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface-2); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }

/* ── Keyword Search Bar ──────────────────────────────────────────────────  */
.search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 7px;
    flex-wrap: wrap;
}
.search-bar-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    color: var(--text-dim);
    white-space: nowrap;
    flex-shrink: 0;
}
.search-input-wrap {
    flex: 1;
    position: relative;
    min-width: 140px;
}
.search-input-wrap input[type="text"] {
    width: 100%;
    padding: 5px 26px 5px 9px;
    border: 1.5px solid var(--border);
    border-radius: 4px;
    font-size: 12px;
    font-family: 'IBM Plex Mono', monospace;
    background: var(--surface-2);
    color: var(--text);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
    appearance: none;
    -webkit-appearance: none;
    box-shadow: none;
}
.search-input-wrap input[type="text"]:focus {
    border-color: var(--accent);
    background: var(--surface);
    box-shadow: 0 0 0 3px var(--accent-dim);
}
.search-clear {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 15px;
    line-height: 1;
    padding: 0 2px;
    transition: color 0.12s;
}
.search-clear:hover { color: var(--text); }
.search-counter {
    font-size: 11px;
    font-family: 'IBM Plex Mono', monospace;
    color: var(--text-dim);
    white-space: nowrap;
    min-width: 72px;
    text-align: center;
    flex-shrink: 0;
}
.search-counter.no-results { color: var(--red); font-weight: 600; }
.search-nav {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 3px 9px;
    cursor: pointer;
    font-size: 10px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: all 0.15s;
}
.search-nav:hover:not(:disabled) {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}
.search-nav:disabled { opacity: 0.35; cursor: not-allowed; }

/* Text highlights injected by the search engine */
mark.search-hit {
    background: #fef08a;   /* yellow — visible on white or surface-2 */
    color: var(--text);
    border-radius: 2px;
    padding: 0 1px;
    font-style: inherit;
    font-weight: inherit;
}
mark.search-hit-active {
    background: #c2410c;   /* dark orange — current match stands out, AA contrast with white text */
    color: #ffffff;
    border-radius: 2px;
    padding: 0 1px;
    outline: 2px solid #7c2d12;
}

/* ── Mobile ──────────────────────────────────────────────────────────────  */
@media (max-width: 768px) {
    .app-body { grid-template-columns: 1fr; }
    .sidebar { border-right: none; border-bottom: 1px solid var(--border); max-height: 60vh; }
    .main-content { padding: 18px 16px; }
    .diff-container { grid-template-columns: 1fr; }
    .diff-dates-row { flex-direction: column; gap: 0; }
    .header-title { font-size: 20px; }
    .api-status { display: none; }
}