/* OpenArk User UI brand — F.4.1 / v1.5 Wave 4.
 *
 * Scoped to host pages that include lib/host_header.inc.php (and the
 * pre-auth pages that opt in via a direct <link>). Admin and the chat
 * widget have their own visual systems and do NOT pull this in.
 *
 * Design philosophy: minimalist editorial. Mostly black-on-light-grey
 * with one accent. Buttons default to filled-black for primary (the
 * Apple/Linear/OpenAI move) — no gradient, no shadow stack, no candy
 * colour palette. Headings carry the brand via Półtawski Nowy; body
 * text in IBM Plex Sans for the workhorse.
 *
 * Loaded via <link rel="stylesheet"> after Bootstrap so it cascades
 * over Bootstrap defaults.
 */

:root {
  /* ── Brand palette ──────────────────────────────────────────────── */
  --openark-fg:            #1d1d1f;  /* primary text · primary button bg · headings */
  --openark-fg-soft:       #2d2d2f;  /* hover/active state of primary buttons */
  --openark-bg:            #f5f5f5;  /* page background */
  --openark-surface:       #ffffff;  /* cards · modals · inputs */
  --openark-surface-2:     #fafafa;  /* table headers · subtle bands */
  --openark-border:        #e5e5e7;  /* dividers, default card border */
  --openark-border-strong: #d2d2d7;  /* form-control border · button outlines */
  --openark-muted:         #6e6e73;  /* secondary text · disabled labels */
  --openark-muted-2:       #86868b;  /* tertiary · footnotes · timestamps */
  --openark-accent:        #5856d6;  /* links · focus outlines · subtle highlights */
  --openark-accent-soft:   #f3f3ff;  /* tinted background for accent regions */

  --openark-success:       #10b981;
  --openark-success-bg:    #ecfdf5;
  --openark-success-fg:    #065f46;
  --openark-warn:          #f59e0b;
  --openark-warn-bg:       #fffbeb;
  --openark-warn-fg:       #92400e;
  --openark-danger:        #d70015;
  --openark-danger-bg:     #fef2f2;
  --openark-danger-fg:     #991b1b;

  /* ── Geometry ──────────────────────────────────────────────────── */
  --openark-radius:        8px;
  --openark-radius-sm:     6px;
  --openark-radius-lg:     12px;

  /* ── Typography ────────────────────────────────────────────────── */
  --openark-font-body:     "IBM Plex Sans", system-ui, -apple-system,
                           "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --openark-font-head:     "Półtawski Nowy", Georgia, "Times New Roman", serif;
  --openark-font-mono:     "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

/* ── Base typography + layout ─────────────────────────────────────── */

body {
  font-family: var(--openark-font-body);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
  background: var(--openark-bg);
  color: var(--openark-fg);
  font-feature-settings: "kern", "liga";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, .h1, .h2, .h3 {
  font-family: var(--openark-font-head);
  font-weight: 700;
  color: var(--openark-fg);
  letter-spacing: -0.015em;
}
h1, .h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}
h2, .h2 {
  font-size: clamp(1.5rem, 2.6vw, 1.875rem);
  line-height: 1.15;
  margin-bottom: 0.5rem;
}
h3, .h3 {
  font-size: 1.25rem;
  line-height: 1.25;
  margin-bottom: 0.5rem;
}
h4, h5, h6, .h4, .h5, .h6 {
  font-family: var(--openark-font-body);
  font-weight: 600;
  color: var(--openark-fg);
}

.container, .container-fluid {
  max-width: 1280px;
}
main {
  padding-top: 2rem;
}

/* ── Navbar ───────────────────────────────────────────────────────── */

.navbar {
  background: var(--openark-surface) !important;
  border-bottom: 1px solid var(--openark-border) !important;
  padding: 0.625rem 1.25rem !important;
  min-height: 60px;
  /* z-index:1030 matches Bootstrap's `--bs-navbar-fixed-top-zindex`. Pairs
     with chat.php's `main.chat-shell { z-index: 1 }` so the widget's
     positioned host is contained inside chat-shell's stacking context and
     the navbar dropdowns layer above it. */
  position: relative;
  z-index: 1030;
}
.navbar-brand {
  font-family: var(--openark-font-head);
  font-weight: 700;
  font-size: 1.375rem;
  letter-spacing: -0.02em;
  color: var(--openark-fg) !important;
  margin-right: 1.5rem;
}
.nav-link {
  color: var(--openark-muted) !important;
  font-weight: 500;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0.45rem 0.8rem !important;
  border-radius: var(--openark-radius-sm);
  margin: 0 1px;
  text-decoration: none !important;
  transition: color 0.12s ease, background 0.12s ease;
}
.nav-link:hover, .nav-link:focus {
  color: var(--openark-fg) !important;
  background: var(--openark-surface-2);
  text-decoration: none !important;
}
.nav-link.active {
  color: var(--openark-fg) !important;
  background: var(--openark-surface-2);
}
.nav-link.disabled {
  color: var(--openark-muted-2) !important;
  background: transparent;
  cursor: not-allowed;
}
.nav-link svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
  flex-shrink: 0;
}

/* Dropdown caret on parent nav-link — Bootstrap's default ::after is a
   solid triangle; replace with a thinner Lucide-style chevron. */
.nav-link.dropdown-toggle::after {
  display: inline-block;
  width: 10px;
  height: 10px;
  border: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236e6e73' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><path d='m6 9 6 6 6-6'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 10px 10px;
  vertical-align: middle;
  margin-left: 4px;
  border-top: none;
  transition: transform 0.12s ease;
}
.nav-link.dropdown-toggle.show::after,
.nav-link.dropdown-toggle[aria-expanded="true"]::after { transform: rotate(180deg); }

/* Dropdown menu — match the brand: square-er corners, subtle shadow, tight spacing. */
.dropdown-menu {
  background: var(--openark-surface);
  border: 1px solid var(--openark-border);
  border-radius: var(--openark-radius);
  padding: 0.4rem;
  box-shadow: 0 8px 24px -8px rgba(29, 29, 31, 0.15), 0 2px 6px -2px rgba(29, 29, 31, 0.08);
  min-width: 200px;
  margin-top: 6px !important;
  font-size: 0.875rem;
}
.dropdown-item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 0.5rem 0.75rem;
  border-radius: var(--openark-radius-sm);
  color: var(--openark-fg);
  font-weight: 500;
  width: 100%;
  text-decoration: none !important;
  transition: background 0.1s ease, color 0.1s ease;
}
.dropdown-item:hover, .dropdown-item:focus {
  background: var(--openark-surface-2);
  color: var(--openark-fg);
  text-decoration: none !important;
}
.dropdown-item.active, .dropdown-item:active {
  background: var(--openark-fg);
  color: #fff;
}
.dropdown-item svg {
  width: 14px; height: 14px;
  flex-shrink: 0;
  color: var(--openark-muted);
}
.dropdown-item:hover svg, .dropdown-item:focus svg { color: var(--openark-fg); }
.dropdown-item.active svg, .dropdown-item:active svg { color: #fff; }
.dropdown-divider {
  margin: 0.4rem 0;
  border-color: var(--openark-border);
}

/* Org card — replaces the loose "email · org" text. Reads as a piece of
   chrome separate from the nav. Click target is intentionally the whole
   card; no link target today (just identity). */
.openark-org-card {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0.4rem 0.7rem;
  background: var(--openark-surface-2);
  border: 1px solid var(--openark-border);
  border-radius: var(--openark-radius-sm);
  color: var(--openark-fg);
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.2;
  max-width: 220px;
  cursor: default;
}
.openark-org-card svg {
  width: 14px; height: 14px;
  color: var(--openark-muted);
  flex-shrink: 0;
}
.openark-org-card-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* user_meta_extra (e.g. chat.php's persona pill) */
.openark-nav-meta {
  color: var(--openark-muted);
  font-size: 0.8125rem;
}
.openark-nav-meta strong {
  color: var(--openark-fg);
  font-weight: 500;
}

/* ── Cards ────────────────────────────────────────────────────────── */

.card {
  background: var(--openark-surface);
  border: 1px solid var(--openark-border);
  border-radius: var(--openark-radius);
  box-shadow: none;
}
.card + .card {
  margin-top: 1rem;
}
.card-header {
  background: transparent;
  border-bottom: 1px solid var(--openark-border);
  padding: 0.875rem 1.25rem;
  font-weight: 600;
  font-size: 0.9375rem;
}
.card-body {
  padding: 1.25rem;
}
.card-footer {
  background: var(--openark-surface-2);
  border-top: 1px solid var(--openark-border);
  padding: 0.875rem 1.25rem;
}

/* ── Buttons ──────────────────────────────────────────────────────── */

.btn {
  font-family: var(--openark-font-body);
  font-weight: 500;
  border-radius: var(--openark-radius-sm);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  letter-spacing: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
  border: 1px solid transparent;
}
.btn svg {
  width: 14px;
  height: 14px;
  stroke-width: 2;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--openark-fg);
  border-color: var(--openark-fg);
  color: #fff;
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
  background: var(--openark-fg-soft) !important;
  border-color: var(--openark-fg-soft) !important;
  color: #fff !important;
}
.btn-secondary {
  background: var(--openark-surface);
  color: var(--openark-fg);
  border-color: var(--openark-border-strong);
}
.btn-secondary:hover, .btn-secondary:focus {
  background: var(--openark-surface-2);
  color: var(--openark-fg);
  border-color: var(--openark-fg);
}
.btn-outline-secondary {
  background: var(--openark-surface);
  color: var(--openark-fg);
  border-color: var(--openark-border-strong);
}
.btn-outline-secondary:hover, .btn-outline-secondary:focus {
  background: var(--openark-surface-2);
  color: var(--openark-fg);
  border-color: var(--openark-fg);
}
.btn-outline-primary {
  background: transparent;
  color: var(--openark-fg);
  border-color: var(--openark-fg);
}
.btn-outline-primary:hover, .btn-outline-primary:focus {
  background: var(--openark-fg);
  color: #fff;
}
.btn-danger {
  background: var(--openark-danger);
  border-color: var(--openark-danger);
  color: #fff;
}
.btn-danger:hover, .btn-danger:focus {
  background: #b00012;
  border-color: #b00012;
}
.btn-success {
  background: var(--openark-success);
  border-color: var(--openark-success);
  color: #fff;
}
.btn-link {
  color: var(--openark-accent);
  font-weight: 500;
  padding: 0;
  border: none;
  background: transparent;
  text-decoration: none;
}
.btn-link:hover { color: var(--openark-fg); }

.btn-sm {
  padding: 0.3rem 0.65rem;
  font-size: 0.8125rem;
}
.btn-lg {
  padding: 0.7rem 1.4rem;
  font-size: 0.9375rem;
}

/* ── Form controls ────────────────────────────────────────────────── */

.form-control, .form-select {
  background: var(--openark-surface);
  border: 1px solid var(--openark-border-strong);
  border-radius: var(--openark-radius-sm);
  font-family: var(--openark-font-body);
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  color: var(--openark-fg);
  line-height: 1.5;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.form-control:focus, .form-select:focus {
  border-color: var(--openark-fg);
  box-shadow: 0 0 0 3px rgba(29, 29, 31, 0.1);
}
.form-control[readonly] {
  background: var(--openark-surface-2);
  color: var(--openark-muted);
}
.form-control:disabled, .form-select:disabled {
  background: var(--openark-surface-2);
  color: var(--openark-muted);
  cursor: not-allowed;
}
.form-label {
  font-weight: 500;
  color: var(--openark-fg);
  margin-bottom: 0.4rem;
  font-size: 0.875rem;
}
.form-text {
  color: var(--openark-muted);
  font-size: 0.8125rem;
}
.form-check-input {
  border-color: var(--openark-border-strong);
}
.form-check-input:checked {
  background-color: var(--openark-fg);
  border-color: var(--openark-fg);
}
.form-check-input:focus {
  border-color: var(--openark-fg);
  box-shadow: 0 0 0 3px rgba(29, 29, 31, 0.1);
}
.form-check-label {
  font-size: 0.9375rem;
  color: var(--openark-fg);
}

/* ── Tables ───────────────────────────────────────────────────────── */

.table {
  --bs-table-bg: transparent;
  color: var(--openark-fg);
  margin-bottom: 0;
}
.table thead th {
  background: var(--openark-surface-2);
  border-bottom: 1px solid var(--openark-border);
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.8125rem;
  color: var(--openark-muted);
  padding: 0.65rem 0.75rem;
}
.table tbody td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--openark-border);
  vertical-align: middle;
  font-size: 0.9375rem;
}
.table tbody tr:last-child td {
  border-bottom: none;
}
.table tbody tr:hover {
  background: var(--openark-surface-2);
}
/* When a card wraps a table, kill the radii at the join. */
.card .table { border-radius: 0; }
.card > .table:first-child thead th:first-child { border-top-left-radius: var(--openark-radius); }
.card > .table:first-child thead th:last-child  { border-top-right-radius: var(--openark-radius); }

/* ── Badges ───────────────────────────────────────────────────────── */

.badge {
  font-family: var(--openark-font-body);
  font-weight: 500;
  font-size: 0.75rem;
  padding: 0.3em 0.6em;
  border-radius: 4px;
  letter-spacing: 0.01em;
}
.badge.bg-success { background: var(--openark-success-bg) !important; color: var(--openark-success-fg); border: 1px solid #a7f3d0; }
.badge.bg-warning { background: var(--openark-warn-bg) !important; color: var(--openark-warn-fg); border: 1px solid #fde68a; }
.badge.bg-danger  { background: var(--openark-danger-bg) !important; color: var(--openark-danger-fg); border: 1px solid #fecaca; }
.badge.bg-info    { background: var(--openark-accent-soft) !important; color: var(--openark-accent); border: 1px solid #dad9ff; }
.badge.bg-secondary { background: var(--openark-surface-2) !important; color: var(--openark-muted); border: 1px solid var(--openark-border); }
.badge.bg-light   { background: var(--openark-surface-2) !important; color: var(--openark-muted); border: 1px solid var(--openark-border); }

/* ── Alerts ───────────────────────────────────────────────────────── */

.alert {
  border: 1px solid var(--openark-border);
  border-radius: var(--openark-radius);
  padding: 0.875rem 1rem;
  font-size: 0.9375rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.alert svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }
.alert-success { background: var(--openark-success-bg); border-color: #a7f3d0; color: var(--openark-success-fg); }
.alert-danger  { background: var(--openark-danger-bg); border-color: #fecaca; color: var(--openark-danger-fg); }
.alert-warning { background: var(--openark-warn-bg); border-color: #fde68a; color: var(--openark-warn-fg); }
.alert-info    { background: var(--openark-surface); border-color: var(--openark-border-strong); color: var(--openark-fg); }

/* ── Code & monospace ────────────────────────────────────────────── */

code, kbd, pre, samp {
  font-family: var(--openark-font-mono);
  font-size: 0.875em;
}
:not(pre) > code {
  background: var(--openark-surface-2);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--openark-fg);
  border: 1px solid var(--openark-border);
}
pre {
  background: var(--openark-surface-2);
  border: 1px solid var(--openark-border);
  border-radius: var(--openark-radius);
  padding: 1rem;
  overflow-x: auto;
}
kbd {
  background: var(--openark-surface);
  border: 1px solid var(--openark-border-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.1em 0.4em;
  color: var(--openark-fg);
  font-weight: 500;
}

/* ── Links ────────────────────────────────────────────────────────── */

a {
  color: var(--openark-accent);
  text-decoration: none;
  transition: color 0.12s ease;
}
a:hover {
  color: var(--openark-fg);
}
.text-muted { color: var(--openark-muted) !important; }

/* ── Page header pattern ──────────────────────────────────────────── */

.openark-page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--openark-border);
}
.openark-page-header h1 {
  margin-bottom: 0.25rem;
}
.openark-page-header .openark-page-subtitle {
  color: var(--openark-muted);
  font-size: 1rem;
  margin-bottom: 0;
  max-width: 64ch;
}
.openark-page-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-shrink: 0;
}

/* ── Section header (within a page) ───────────────────────────────── */

.openark-section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin: 2rem 0 1rem;
  gap: 1rem;
}
.openark-section-header h2 {
  margin-bottom: 0;
  font-size: 1.25rem;
  font-family: var(--openark-font-body);
  font-weight: 600;
  letter-spacing: 0;
}
.openark-section-header .openark-section-meta {
  color: var(--openark-muted);
  font-size: 0.875rem;
}

/* ── Empty state ──────────────────────────────────────────────────── */

.openark-empty {
  text-align: center;
  padding: 3.5rem 2rem;
  color: var(--openark-muted);
  border: 1px dashed var(--openark-border-strong);
  border-radius: var(--openark-radius);
  background: var(--openark-surface);
}
.openark-empty-icon {
  display: inline-flex;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--openark-surface-2);
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--openark-muted);
}
.openark-empty-icon svg {
  width: 24px; height: 24px;
  stroke-width: 2;
}
.openark-empty h2 {
  font-size: 1.25rem;
  font-family: var(--openark-font-body);
  font-weight: 600;
  color: var(--openark-fg);
  margin-bottom: 0.5rem;
  letter-spacing: 0;
}
.openark-empty p {
  margin-bottom: 1.5rem;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
  font-size: 0.9375rem;
}

/* ── Inline icon + text rhythm ─────────────────────────────────────── */

.openark-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.openark-inline svg {
  width: 14px; height: 14px;
  flex-shrink: 0;
  color: var(--openark-muted);
}

/* Status pills (alternative to badges for inline status indicators) */
.openark-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--openark-muted);
}
.openark-status::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.openark-status-active   { color: var(--openark-success); }
.openark-status-inactive { color: var(--openark-muted-2); }
.openark-status-warn     { color: var(--openark-warn); }
.openark-status-error    { color: var(--openark-danger); }

/* ── Mobile tweaks ────────────────────────────────────────────────── */

@media (max-width: 991px) {
  .navbar-nav .nav-link .openark-nav-label {
    display: none;
  }
  .navbar-nav .nav-link {
    padding: 0.5rem !important;
  }
  .nav-link.dropdown-toggle::after {
    margin-left: 0;
  }
  .openark-nav-meta {
    display: none;
  }
  .openark-org-card-name {
    display: none;
  }
  .openark-org-card {
    padding: 0.4rem;
  }
}
@media (max-width: 576px) {
  .openark-page-header {
    flex-direction: column;
    align-items: stretch;
  }
  .openark-page-actions {
    flex-wrap: wrap;
  }
  .navbar-brand { font-size: 1.125rem; }
  main { padding-top: 1.25rem; padding-bottom: 2.5rem; }
}

/* ── Utility helpers used across pages ────────────────────────────── */

.openark-muted   { color: var(--openark-muted) !important; }
.openark-mono    { font-family: var(--openark-font-mono); font-size: 0.875em; }
.openark-divider { height: 1px; background: var(--openark-border); margin: 1.5rem 0; border: none; }

.openark-helper-text {
  color: var(--openark-muted);
  font-size: 0.8125rem;
  margin-top: 0.25rem;
}

/* ── CodeMirror mount (F.4.2 / F.4.3) ─────────────────────────────── */
/* Shared base styles for embedded CodeMirror 6 editors. The mount div
   replaces a textarea via progressive enhancement — the textarea stays
   in the DOM (hidden) as the form-submit value source.                 */

.openark-cm-mount {
  border: 1px solid var(--openark-border);
  border-radius: var(--openark-radius);
  background: #fff;
  overflow: hidden;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.openark-cm-mount:focus-within {
  border-color: var(--openark-accent);
  box-shadow: 0 0 0 3px rgba(88, 86, 214, 0.12);
}
.openark-cm-mount .cm-editor {
  font-family: var(--openark-font-mono);
  font-size: 0.875rem;
  line-height: 1.55;
  min-height: 320px;
}
.openark-cm-mount .cm-editor.cm-focused { outline: none; }
.openark-cm-mount .cm-scroller { font-family: inherit; }
.openark-cm-mount .cm-content { padding: 0.6rem 0.75rem; }
.openark-cm-mount .cm-cursor { border-left-color: var(--openark-fg); }
.openark-cm-mount .cm-selectionBackground { background: rgba(88, 86, 214, 0.15) !important; }
.openark-cm-mount .cm-tooltip {
  background: #fff;
  border: 1px solid var(--openark-border);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.openark-cm-mount .cm-tooltip.cm-tooltip-autocomplete > ul { font-family: var(--openark-font-mono); font-size: 0.8125rem; }
.openark-cm-mount .cm-tooltip.cm-tooltip-autocomplete > ul > li[aria-selected] {
  background: var(--openark-fg);
  color: #fff;
}
.openark-cm-mount .cm-completionDetail {
  font-style: normal;
  color: var(--openark-muted);
  font-size: 0.75rem;
  margin-left: 0.5rem;
}
.openark-cm-mount .cm-completionInfo {
  background: #fff;
  border: 1px solid var(--openark-border);
  border-radius: 6px;
  padding: 0.5rem 0.65rem;
  font-family: var(--openark-font-body);
  font-size: 0.8125rem;
  max-width: 260px;
  color: var(--openark-fg);
}

/* ── Project palette tokens (F.4.4) ───────────────────────────────── */
/* Six closed-set color tokens used by api/projects.php's color column.
   Pair: --openark-proj-{name} (fill dot) + the swatch CSS below. Adding
   a color = adding a token here + the api/projects.php whitelist. */
:root {
  --openark-proj-slate:  #64748b;
  --openark-proj-indigo: #6366f1;
  --openark-proj-green:  #10b981;
  --openark-proj-amber:  #f59e0b;
  --openark-proj-rose:   #f43f5e;
  --openark-proj-violet: #8b5cf6;
}

/* ── Chat sidebar (F.4.4 / Phase 5b) ──────────────────────────────── */
/* Lives in chat.php as a sibling of the chat-pane inside .chat-shell.
   Layout decisions:
     - Desktop (≥992px): always-visible 280px rail with sticky header/footer.
     - Tablet (768-991px): same shape, narrower at 240px.
     - Mobile (<768px): off-canvas drawer overlay; hamburger in navbar
       toggles .chat-sidebar.is-open.
     - When the widget opens canvas (sets host attribute `canvas-open`),
       the sidebar collapses to a 56px icon rail; hover expands it back. */

/* main.chat-shell layout (flex-direction: row + z-index) is owned by chat.php's
   inline $extra_head — keeping page-specific layout where the page lives. */

.chat-sidebar {
  flex: 0 0 280px;
  width: 280px;
  border-right: 1px solid var(--openark-border);
  background: var(--openark-surface);
  display: flex;
  flex-direction: column;
  min-height: 0;
  transition: flex-basis 0.18s ease, width 0.18s ease;
  position: relative;
  z-index: 2;
}
.chat-sidebar-header,
.chat-sidebar-footer {
  flex: 0 0 auto;
  padding: 0.75rem;
  background: var(--openark-surface);
}
.chat-sidebar-header { border-bottom: 1px solid var(--openark-border); }
.chat-sidebar-footer { border-top:    1px solid var(--openark-border); }
.chat-sidebar-body {
  flex: 1 1 auto;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0.5rem 0.5rem 0.75rem;
}
/* "+ New chat" + "+ New project" buttons */
.chat-sidebar-cta {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  background: var(--openark-fg);
  color: #fff;
  border: 1px solid var(--openark-fg);
  border-radius: var(--openark-radius);
  font-family: var(--openark-font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.12s ease;
}
.chat-sidebar-cta:hover { background: #000; }
.chat-sidebar-cta--secondary {
  background: var(--openark-surface-2);
  color: var(--openark-fg);
  border-color: var(--openark-border);
  font-weight: 400;
}
.chat-sidebar-cta--secondary:hover { background: var(--openark-border); color: var(--openark-fg); }

/* Persona picker (v1.6 polish) — sits above the "+ New chat" CTA in the
   sidebar header. Hidden on chat.php when the user has only one persona
   (PHP omits the markup). */
.cs-persona-picker {
  position: relative;
  margin-bottom: 0.5rem;
}
.cs-persona-pick-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0.6rem;
  background: var(--openark-surface-2);
  color: var(--openark-fg);
  border: 1px solid var(--openark-border);
  border-radius: var(--openark-radius);
  font-family: var(--openark-font-body);
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.1s ease, border-color 0.1s ease;
}
.cs-persona-pick-btn:hover { background: var(--openark-border); }
.cs-persona-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--openark-muted);
}
.cs-persona-label #cs-persona-active { color: var(--openark-fg); font-weight: 500; }
.cs-persona-caret { flex: 0 0 auto; opacity: 0.6; }

.cs-persona-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  margin: 0;
  padding: 0.25rem;
  list-style: none;
  background: var(--openark-bg);
  border: 1px solid var(--openark-border);
  border-radius: var(--openark-radius);
  box-shadow: 0 8px 24px -8px rgba(15, 23, 42, 0.18);
  max-height: 280px;
  overflow-y: auto;
  z-index: 20;
}
.cs-persona-menu[hidden] { display: none; }
.cs-persona-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0.55rem;
  border-radius: calc(var(--openark-radius) - 2px);
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--openark-fg);
  transition: background 0.1s ease;
}
.cs-persona-item:hover { background: var(--openark-surface-2); }
.cs-persona-item.is-active {
  background: var(--openark-surface-2);
  font-weight: 500;
}
.cs-persona-item-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cs-persona-item-check { color: var(--openark-fg); opacity: 0.75; font-size: 0.85rem; }

/* One project section (header row + collapsed/expanded session list). */
.cs-project { margin-top: 0.25rem; }
.cs-project:first-child { margin-top: 0; }
.cs-project-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.55rem;
  border-radius: var(--openark-radius);
  cursor: pointer;
  user-select: none;
  color: var(--openark-fg);
  transition: background 0.1s ease;
  position: relative;
}
.cs-project-header:hover { background: var(--openark-surface-2); }
.cs-project.is-active > .cs-project-header { background: var(--openark-surface-2); }
.cs-project.is-active > .cs-project-header::before {
  /* Subtle left-edge marker for the "active project" (last interacted —
     governs where global "+ New chat" lands). 2px stripe in the project's
     own color so it ties visually to the dot. */
  content: '';
  position: absolute;
  left: -2px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  border-radius: 1px;
  background: var(--cs-color, var(--openark-proj-slate));
}

.cs-project-chevron {
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--openark-muted);
  transition: transform 0.12s ease;
}
.cs-project.is-expanded > .cs-project-header > .cs-project-chevron { transform: rotate(90deg); }

.cs-project-dot {
  flex: 0 0 10px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cs-color, var(--openark-proj-slate));
}
.cs-project-name {
  flex: 1 1 auto;
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cs-project-count {
  flex: 0 0 auto;
  font-size: 0.75rem;
  color: var(--openark-muted);
  font-variant-numeric: tabular-nums;
}
.cs-project-action {
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  background: transparent;
  border: 0;
  color: var(--openark-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.12s ease, background 0.12s ease, color 0.12s ease;
}
.cs-project-header:hover .cs-project-action { opacity: 1; }
.cs-project-action:hover { background: var(--openark-border); color: var(--openark-fg); }
.cs-project-action svg { width: 14px; height: 14px; }

.cs-project-sessions {
  display: none;
  margin: 0.15rem 0 0.25rem 1.65rem;
  padding-left: 0.4rem;
  border-left: 1px solid var(--openark-border);
}
.cs-project.is-expanded > .cs-project-sessions { display: block; }

.cs-session {
  display: block;
  padding: 0.4rem 0.55rem;
  margin: 0.1rem 0;
  border-radius: var(--openark-radius);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: background 0.1s ease;
}
.cs-session:hover { background: var(--openark-surface-2); }
.cs-session.is-current {
  background: var(--openark-surface-2);
  box-shadow: inset 2px 0 0 var(--openark-fg);
}
.cs-session-primary {
  font-size: 0.8125rem;
  color: var(--openark-fg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.35;
}
.cs-session-meta {
  display: block;
  font-size: 0.7rem;
  color: var(--openark-muted);
  margin-top: 0.1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Rename pencil on session rows. Hidden until row hover to keep the list
   visually quiet. Positioned top-right of the row; click handler stops
   propagation so it doesn't navigate. */
.cs-session { position: relative; padding-right: 1.85rem; }
.cs-session-rename {
  position: absolute;
  top: 0.35rem;
  right: 0.35rem;
  width: 1.4rem;
  height: 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 0;
  border-radius: var(--openark-radius-sm);
  color: var(--openark-muted);
  opacity: 0;
  cursor: pointer;
  transition: opacity 0.1s ease, background 0.1s ease, color 0.1s ease;
}
.cs-session:hover .cs-session-rename,
.cs-session-rename:focus-visible { opacity: 1; }
.cs-session-rename:hover { background: var(--openark-bg); color: var(--openark-fg); }

.cs-empty {
  font-size: 0.75rem;
  color: var(--openark-muted);
  padding: 0.4rem 0.85rem;
  font-style: italic;
}

/* Color-swatch row used by Create / Rename modals + the change-color popover.
   8 columns gives nice spacing on the 6 swatches with room. */
.cs-swatches {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.4rem;
  margin: 0.5rem 0;
}
.cs-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--cs-color, var(--openark-proj-slate));
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.1s ease;
  padding: 0;
}
.cs-swatch:hover { transform: scale(1.08); }
.cs-swatch.is-selected { border-color: var(--openark-fg); }

/* Project-gear popover — uses Bootstrap's dropdown markup, just retheming. */
.cs-gear-menu {
  min-width: 200px;
  padding: 0.5rem;
}
.cs-gear-menu .dropdown-item {
  border-radius: 4px;
  padding: 0.4rem 0.65rem;
  font-size: 0.8125rem;
}
.cs-gear-menu .cs-swatches { margin: 0.4rem 0.4rem 0.2rem; }
.cs-gear-menu hr { margin: 0.4rem 0; }

/* ── Sidebar resize handle (F.4.4 / 5c) ───────────────────────────── */
/* 6px draggable strip sitting between #chat-sidebar and .chat-pane.
   Mirrors the widget's internal .ark-split-handle look so the two
   resize affordances feel like one system. */
.cs-resize-handle {
  flex: 0 0 6px;
  background: var(--openark-border);
  cursor: col-resize;
  position: relative;
  transition: background 0.12s ease;
  z-index: 2;
}
.cs-resize-handle::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 32px;
  border-radius: 1px;
  background: var(--openark-muted);
  opacity: 0.6;
  transition: opacity 0.12s ease, height 0.12s ease, background 0.12s ease;
}
/* Hit-zone expansion without bloating the visible handle. */
.cs-resize-handle::after {
  content: '';
  position: absolute;
  inset: 0 -4px;
}
.cs-resize-handle:hover,
.cs-resize-handle:focus-visible {
  background: var(--openark-accent);
  outline: none;
}
.cs-resize-handle:hover::before,
.cs-resize-handle:focus-visible::before {
  opacity: 1;
  height: 48px;
  background: #fff;
}
/* Hide in canvas-collapsed mode (sidebar is a fixed-width 56px rail; the
   user can't usefully resize it). Hide on mobile where sidebar is a drawer
   overlay (resize is meaningless against a position:fixed element). */
@media (max-width: 991.98px) { .cs-resize-handle { display: none; } }
@media (min-width: 992px) {
  main.chat-shell:has(ark-widget[canvas-open]) .cs-resize-handle { display: none; }
}

/* Mobile hamburger in the navbar — only shown on chat.php and only at <992px.
   Sits in the existing navbar; PHP includes a hidden <button class="cs-hamburger">. */
.cs-hamburger {
  display: none;
  background: transparent;
  border: 0;
  color: var(--openark-fg);
  padding: 0.4rem 0.5rem;
  cursor: pointer;
  border-radius: var(--openark-radius);
}
.cs-hamburger:hover { background: var(--openark-surface-2); }
.cs-hamburger svg { width: 20px; height: 20px; }

/* Mobile drawer behavior. The sidebar becomes a fixed-position overlay
   slid in from the left; .cs-backdrop dims the chat behind it. */
@media (max-width: 991.98px) {
  .cs-hamburger { display: inline-flex; }
  .chat-sidebar {
    position: fixed;
    top: 60px;  /* below the navbar */
    left: 0;
    bottom: 0;
    width: 300px;
    flex-basis: 300px;
    transform: translateX(-100%);
    transition: transform 0.18s ease;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.08);
    z-index: 1029;  /* below navbar (1030), above chat-shell (1) */
  }
  .chat-sidebar.is-open { transform: translateX(0); }
  .cs-backdrop {
    position: fixed;
    inset: 60px 0 0 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 1028;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease;
  }
  .cs-backdrop.is-open { opacity: 1; pointer-events: auto; }
}

/* Canvas-open behavior (≥992px only). When the widget host carries the
   `canvas-open` attribute, hide the sidebar entirely so the chat + canvas
   panes have the full row to themselves. The user closes canvas (X on the
   canvas pane) to get the sidebar back. The earlier icon-rail-on-hover
   collapse felt visually broken (small floating dots with no labels);
   straight-hide is what ChatGPT-style apps do too. */
@media (min-width: 992px) {
  main.chat-shell:has(ark-widget[canvas-open]) .chat-sidebar { display: none; }
}