/* ==========================================================================
   Multi-Tenant RAG with Access Control — enterprise SaaS UI
   Shares the sibling projects' design language:
     deep violet #2F004F · plum #722268 · coral #E85F5C · amber #F5AB00
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --violet-950: #22003b;
  --violet-900: #2f004f;
  --violet-800: #3d0f63;
  --violet-100: #efe6f7;
  --plum: #722268;
  --coral: #e85f5c;
  --coral-dark: #d14b48;
  --coral-soft: #fdeeed;
  --amber: #f5ab00;
  --amber-soft: #fdf3da;
  --teal: #0e7c86;
  --teal-soft: #e2f4f5;
  --bg: #f7f7f9;
  --surface: #ffffff;
  --ink: #221331;
  --muted: #6f677e;
  --border: #e7e3ee;
  --border-strong: #d8d2e2;
  --success: #1e9e6a;
  --success-soft: #e4f5ee;
  --danger: #c43d3b;
  --danger-soft: #fbe9e9;
  --confidential: #b3261e;
  --confidential-soft: #fbe6e4;
  --radius: 12px;
  --radius-sm: 8px;
  --rail-w: 250px;
  --topbar-h: 60px;
  --shadow-sm: 0 1px 2px rgba(34, 0, 59, 0.06), 0 1px 3px rgba(34, 0, 59, 0.08);
  --shadow-md: 0 4px 16px rgba(34, 0, 59, 0.10);
  --shadow-lg: 0 12px 40px rgba(34, 0, 59, 0.18);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 15px; overflow-x: hidden; -webkit-font-smoothing: antialiased;
}
code, pre, .mono { font-family: 'JetBrains Mono', monospace; font-size: 0.85em; }
code { background: var(--violet-100); color: var(--violet-900); padding: 0.1em 0.4em; border-radius: 5px; }
h1, h2, h3, h4 { margin: 0 0 0.5rem 0; font-weight: 700; color: var(--ink); }
p { margin: 0 0 0.5rem 0; }
button { font-family: inherit; cursor: pointer; }
a { color: var(--plum); }
::selection { background: var(--coral); color: #fff; }

/* ==========================================================================
   Login gate
   ========================================================================== */
.login-screen {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 1.2rem;
  background: linear-gradient(135deg, var(--violet-900) 0%, var(--violet-950) 60%, #12001f 100%);
  overflow-y: auto;
}
.login-card { width: min(100%, 460px); padding: 1.7rem 1.6rem; margin: auto; }
.login-brand { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.9rem; }
.login-brand .brand-mark { width: 44px; height: 44px; border-radius: 12px; background: var(--violet-100); border: none; display: flex; align-items: center; justify-content: center; }
.login-brand .brand-name { font-size: 1.15rem; font-weight: 800; color: var(--ink); }
.login-brand .brand-sub { font-size: 0.72rem; color: var(--muted); font-weight: 600; }

.demo-accounts { margin-top: 1.2rem; border-top: 1px solid var(--border); padding-top: 1rem; }
.demo-title { font-size: 0.72rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin-bottom: 0.6rem; display: flex; align-items: baseline; gap: 0.5rem; flex-wrap: wrap; }
.demo-title .hint { text-transform: none; letter-spacing: 0; font-weight: 600; }
.demo-groups { display: flex; flex-direction: column; gap: 0.75rem; }
.demo-tenant-block { }
.demo-tenant-name { font-size: 0.74rem; font-weight: 800; color: var(--violet-900); margin-bottom: 0.4rem; }
.demo-user-row { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.demo-user {
  display: flex; flex-direction: column; align-items: flex-start; gap: 0.15rem;
  border: 1px solid var(--border-strong); background: var(--surface); border-radius: var(--radius-sm);
  padding: 0.45rem 0.6rem; text-align: left; transition: border-color 0.15s ease, background 0.15s ease;
}
.demo-user:hover { border-color: var(--plum); background: var(--violet-100); }
.demo-user .du-name { font-size: 0.8rem; font-weight: 700; color: var(--ink); }
.demo-user .du-groups { font-size: 0.64rem; font-weight: 600; color: var(--muted); }
.demo-user .du-admin { color: var(--coral); }

/* ==========================================================================
   Shell
   ========================================================================== */
.app-shell { display: flex; min-height: 100vh; }
.nav-rail {
  width: var(--rail-w);
  background: linear-gradient(180deg, var(--violet-900) 0%, var(--violet-950) 100%);
  color: #efe9f6; display: flex; flex-direction: column;
  position: fixed; inset: 0 auto 0 0; z-index: 60;
  transform: translateX(-100%); transition: transform 0.24s ease;
}
.nav-rail.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
.nav-brand { display: flex; align-items: center; gap: 0.7rem; padding: 1.15rem 1.1rem; border-bottom: 1px solid rgba(255,255,255,0.09); }
.brand-mark { width: 38px; height: 38px; border-radius: 10px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name { font-weight: 800; font-size: 1rem; color: #fff; letter-spacing: 0.01em; }
.brand-sub { font-size: 0.68rem; color: #b9a8cd; font-weight: 500; }

.nav-menu { padding: 0.9rem 0.7rem; display: flex; flex-direction: column; gap: 0.25rem; }
.nav-item { display: flex; align-items: center; gap: 0.7rem; width: 100%; background: transparent; border: none; color: #cbbcdc; font-size: 0.9rem; font-weight: 600; padding: 0.68rem 0.85rem; border-radius: 9px; text-align: left; transition: background 0.15s ease, color 0.15s ease; position: relative; }
.nav-item:hover { background: rgba(255,255,255,0.07); color: #fff; }
.nav-item.active { background: rgba(255,255,255,0.11); color: #fff; }
.nav-item.active::before { content: ""; position: absolute; left: -0.7rem; top: 20%; bottom: 20%; width: 3px; border-radius: 0 3px 3px 0; background: var(--coral); }

.nav-foot { margin-top: auto; padding: 0.9rem 0.9rem 1.1rem; border-top: 1px solid rgba(255,255,255,0.09); }
.identity { display: flex; flex-direction: column; gap: 0.25rem; }
.identity-tenant { font-size: 0.66rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em; color: var(--amber); }
.identity-user { font-size: 0.9rem; font-weight: 700; color: #fff; }
.identity-groups { display: flex; flex-wrap: wrap; gap: 0.3rem; margin: 0.3rem 0 0.6rem; }
.identity-groups .gpill { font-size: 0.62rem; font-weight: 700; color: #e7dcf3; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.14); border-radius: 999px; padding: 0.08rem 0.5rem; }
.identity-groups .gpill.admin { color: #ffd9a0; background: rgba(245,171,0,0.16); border-color: rgba(245,171,0,0.35); }
.signout-btn { margin-top: 0.2rem; }

.backdrop { position: fixed; inset: 0; background: rgba(34,0,59,0.45); z-index: 55; opacity: 0; pointer-events: none; transition: opacity 0.2s ease; }
.backdrop.show { opacity: 1; pointer-events: auto; }
.main-col { flex: 1; min-width: 0; display: flex; flex-direction: column; }

/* ==========================================================================
   Topbar
   ========================================================================== */
.topbar { height: var(--topbar-h); display: flex; align-items: center; gap: 0.85rem; padding: 0 1.1rem; background: rgba(255,255,255,0.9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 40; }
.page-title { font-size: 1.08rem; font-weight: 800; margin: 0; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 0.5rem; min-width: 0; }
.chip { display: inline-flex; align-items: center; gap: 0.4rem; border: 1px solid var(--border); background: var(--surface); color: var(--muted); font-size: 0.75rem; font-weight: 600; padding: 0.32rem 0.7rem; border-radius: 999px; white-space: nowrap; }
.chip-tenant { background: var(--violet-100); color: var(--violet-900); border-color: transparent; font-weight: 800; }
.chip-model { max-width: 220px; overflow: hidden; text-overflow: ellipsis; display: inline-block; line-height: 1.5; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--danger); flex-shrink: 0; }
.status-dot.ok { background: var(--success); }
.icon-btn { background: transparent; border: 1px solid var(--border); color: var(--ink); border-radius: var(--radius-sm); width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; }
.only-mobile { display: inline-flex; }

/* ==========================================================================
   Content / cards / forms  (shared)
   ========================================================================== */
.content { flex: 1; padding: 1.25rem 1.1rem 2rem; width: 100%; max-width: 1120px; margin: 0 auto; }
.view { display: none; }
.view.active { display: block; }
.page-lede { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.1rem; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.15rem 1.2rem; margin-bottom: 1rem; box-shadow: var(--shadow-sm); }
.card-title { font-size: 0.95rem; font-weight: 800; margin-bottom: 0.85rem; display: flex; align-items: center; gap: 0.5rem; }
.card-title svg { color: var(--plum); flex-shrink: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.grid-2.tight { gap: 0.35rem 1.2rem; margin-bottom: 0.3rem; }
.span-2 { grid-column: 1 / -1; }

.field { display: block; margin-bottom: 0.8rem; min-width: 0; }
.field > span { display: block; font-size: 0.78rem; font-weight: 600; color: var(--muted); margin-bottom: 0.35rem; }
.field .val { color: var(--plum); font-weight: 800; }
.optional { font-style: normal; font-weight: 500; color: var(--border-strong); text-transform: uppercase; font-size: 0.65rem; letter-spacing: 0.05em; }
input[type="text"], input[type="password"], textarea, select { width: 100%; background: var(--surface); border: 1px solid var(--border-strong); color: var(--ink); border-radius: var(--radius-sm); padding: 0.58rem 0.75rem; font-size: 0.88rem; font-family: inherit; outline: none; transition: border-color 0.15s ease, box-shadow 0.15s ease; }
input:focus, textarea:focus, select:focus { border-color: var(--plum); box-shadow: 0 0 0 3px rgba(114,34,104,0.13); }
textarea { resize: vertical; min-height: 2.4rem; line-height: 1.45; }
::placeholder { color: #b3abc1; }
input[type="range"] { width: 100%; accent-color: var(--coral); height: 24px; }
.hint { font-size: 0.76rem; color: var(--muted); line-height: 1.5; }
.form-error { color: var(--danger); font-size: 0.8rem; font-weight: 600; margin: 0.2rem 0 0.6rem; }
.key-status { font-weight: 700; color: var(--success); }

.switch-row { display: flex; align-items: center; justify-content: space-between; font-size: 0.85rem; font-weight: 600; color: var(--ink); margin-bottom: 0.8rem; cursor: pointer; gap: 0.6rem; }
.switch-row input[type="checkbox"] { position: absolute; opacity: 0; }
.switch { width: 40px; height: 22px; border-radius: 999px; background: var(--border); border: 1px solid var(--border-strong); position: relative; flex-shrink: 0; transition: background 0.18s ease; }
.switch::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: var(--shadow-sm); transition: transform 0.18s ease; }
.switch-row input:checked + .switch { background: var(--success); border-color: var(--success); }
.switch-row input:checked + .switch::after { transform: translateX(18px); }

.btn { border: 1px solid var(--border-strong); background: var(--surface); color: var(--ink); padding: 0.62rem 1.1rem; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 700; min-height: 42px; display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem; transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease; }
.btn:hover { border-color: var(--plum); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-block { width: 100%; }
.btn-primary { background: var(--coral); border-color: var(--coral); color: #fff; }
.btn-primary:hover { background: var(--coral-dark); border-color: var(--coral-dark); }
.btn-secondary { background: var(--violet-100); border-color: var(--violet-100); color: var(--violet-900); }
.btn-secondary:hover { border-color: var(--plum); }
.btn-ghost-danger { background: transparent; color: var(--danger); border-color: var(--border); }
.btn-ghost-danger:hover { border-color: var(--danger); background: var(--danger-soft); }
.link-text { color: var(--coral); font-weight: 700; text-decoration: underline; cursor: pointer; }
.link-btn { background: none; border: none; padding: 0; color: var(--plum); font-weight: 700; text-decoration: underline; font-size: inherit; cursor: pointer; }

/* toasts */
.toast-container { position: fixed; bottom: 1rem; left: 50%; transform: translateX(-50%); z-index: 120; display: flex; flex-direction: column; gap: 0.5rem; align-items: center; width: min(92vw, 430px); }
.toast { width: 100%; border-radius: var(--radius-sm); padding: 0.68rem 0.95rem; font-size: 0.83rem; font-weight: 600; box-shadow: var(--shadow-md); border: 1px solid var(--border-strong); background: var(--surface); color: var(--ink); animation: toast-in 0.2s ease; }
.toast.success { border-color: var(--success); background: var(--success-soft); color: #0f6b46; }
.toast.error { border-color: var(--danger); background: var(--danger-soft); color: var(--danger); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ==========================================================================
   Chat
   ========================================================================== */
.scope-banner { display: flex; align-items: center; gap: 0.55rem; background: var(--violet-100); border: 1px solid transparent; color: var(--violet-900); font-size: 0.8rem; font-weight: 600; border-radius: var(--radius-sm); padding: 0.6rem 0.85rem; margin-bottom: 0.9rem; }
.scope-banner svg { flex-shrink: 0; color: var(--plum); }
.scope-banner b { color: var(--violet-900); }

.chat-layout { display: grid; grid-template-columns: 1fr; gap: 1rem; height: calc(100vh - var(--topbar-h) - 120px); min-height: 480px; }
.thread-pane { display: flex; flex-direction: column; gap: 0.7rem; min-height: 0; }
.new-thread-btn { flex-shrink: 0; }
.thread-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 0.35rem; padding-right: 2px; }
.thread-item { display: flex; align-items: stretch; gap: 0.2rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); overflow: hidden; transition: border-color 0.15s ease, background 0.15s ease; }
.thread-item:hover { border-color: var(--border-strong); }
.thread-item.active { border-color: var(--plum); background: var(--violet-100); }
.thread-open { flex: 1; min-width: 0; text-align: left; background: transparent; border: none; padding: 0.55rem 0.65rem; display: flex; flex-direction: column; gap: 0.15rem; }
.thread-title { font-size: 0.82rem; font-weight: 700; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.thread-item.active .thread-title { color: var(--violet-900); }
.thread-meta { font-size: 0.68rem; font-weight: 600; color: var(--muted); }
.thread-del { flex-shrink: 0; background: transparent; border: none; color: var(--muted); padding: 0 0.55rem; font-size: 0.8rem; line-height: 1; }
.thread-del:hover { color: var(--danger); background: var(--danger-soft); }
.thread-empty { font-size: 0.78rem; color: var(--muted); padding: 0.6rem 0.3rem; }
.demo-hint { font-size: 0.72rem; color: var(--muted); line-height: 1.55; background: var(--amber-soft); border: 1px solid var(--amber); border-radius: var(--radius-sm); padding: 0.6rem 0.7rem; flex-shrink: 0; }
.demo-hint-title { font-size: 0.68rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.05em; color: #8a6100; margin-bottom: 0.3rem; }

.chat-main { display: flex; flex-direction: column; min-height: 0; }
.params-panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.7rem 0.95rem; margin-bottom: 0.9rem; box-shadow: var(--shadow-sm); flex-shrink: 0; }
.params-panel summary { cursor: pointer; list-style: none; font-size: 0.84rem; font-weight: 700; color: var(--ink); display: flex; align-items: center; gap: 0.5rem; }
.params-panel summary::-webkit-details-marker { display: none; }
.params-panel summary svg { color: var(--plum); }
.params-grid { display: grid; grid-template-columns: 1fr; gap: 0.2rem 1.4rem; padding-top: 0.9rem; margin-top: 0.7rem; border-top: 1px solid var(--border); }

.chat-wrap { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.chat-log { flex: 1; overflow-y: auto; padding: 0.25rem 0.1rem 1rem; display: flex; flex-direction: column; gap: 0.9rem; }
.msg { display: flex; }
.msg-user { justify-content: flex-end; }
.msg-assistant { justify-content: flex-start; }
.bubble { max-width: 92%; border-radius: var(--radius); padding: 0.8rem 0.95rem; font-size: 0.9rem; line-height: 1.6; word-break: break-word; }
.msg-user .bubble { background: var(--violet-900); color: #fff; border-bottom-right-radius: 4px; }
.msg-assistant .bubble { background: var(--surface); border: 1px solid var(--border); border-bottom-left-radius: 4px; width: 100%; box-shadow: var(--shadow-sm); }
.answer-text { white-space: pre-wrap; }
.answer-text.streaming::after { content: "▌"; display: inline-block; margin-left: 1px; animation: blink 1s step-start infinite; color: var(--coral); }
@keyframes blink { 50% { opacity: 0; } }
.error-text { color: var(--danger); font-weight: 600; }

.stage-line { font-size: 0.78rem; font-weight: 700; color: var(--plum); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.45rem; }
.stage-line .spinner { width: 12px; height: 12px; border-radius: 50%; border: 2px solid var(--violet-100); border-top-color: var(--plum); animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.agent-trace { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.6rem 0.75rem; margin-bottom: 0.75rem; }
.trace-title { font-size: 0.64rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); margin-bottom: 0.5rem; }
.trace-steps { display: flex; flex-direction: column; gap: 0.4rem; }
.trace-step { display: flex; align-items: center; gap: 0.55rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.4rem 0.55rem; font-size: 0.8rem; }
.trace-badge { flex-shrink: 0; font-size: 0.6rem; font-weight: 800; letter-spacing: 0.04em; border-radius: 6px; padding: 0.12rem 0.4rem; color: #fff; text-transform: uppercase; }
.trace-badge.kb { background: var(--violet-900); }
.trace-badge.direct { background: var(--success); }
.trace-body { flex: 1; min-width: 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.35rem; }
.trace-tool { font-weight: 700; color: var(--ink); }
.trace-query { color: var(--muted); font-style: italic; overflow: hidden; text-overflow: ellipsis; }
.trace-count { flex-shrink: 0; font-size: 0.68rem; font-weight: 700; color: var(--plum); background: var(--violet-100); border-radius: 999px; padding: 0.1rem 0.5rem; }
.trace-step.direct { color: var(--ink); font-weight: 600; }
.trace-step.running .trace-count { color: var(--muted); background: var(--border); }
.trace-denied { flex-shrink: 0; font-size: 0.64rem; font-weight: 700; color: var(--confidential); background: var(--confidential-soft); border-radius: 999px; padding: 0.1rem 0.5rem; }
.trace-step .dots::after { content: "…"; display: inline-block; animation: blink 1.2s step-start infinite; }

.thinking-box { margin-bottom: 0.7rem; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.55rem 0.75rem; }
.thinking-box summary { font-size: 0.79rem; font-weight: 700; color: var(--muted); cursor: pointer; }
.thinking-text { font-size: 0.79rem; color: var(--muted); white-space: pre-wrap; margin-top: 0.4rem; }

.sources-block { margin-top: 1rem; }
.sources-title { font-size: 0.72rem; font-weight: 800; color: var(--muted); margin-bottom: 0.55rem; text-transform: uppercase; letter-spacing: 0.06em; }
.sources-grid { display: grid; grid-template-columns: 1fr; gap: 0.55rem; }
.source-card { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.7rem 0.85rem; background: var(--bg); }
.source-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 0.35rem; margin-bottom: 0.35rem; }
.source-head-left { display: flex; align-items: center; flex-wrap: wrap; gap: 0.35rem; }
.cite-badge { display: inline-block; background: var(--violet-900); color: #fff; font-weight: 800; border-radius: 7px; padding: 0.06rem 0.5rem; font-size: 0.76rem; }
.source-label { font-size: 0.8rem; font-weight: 700; color: var(--ink); }
.score-pill { display: inline-block; border-radius: 999px; padding: 0.08rem 0.55rem; font-size: 0.7rem; font-weight: 800; }
.pill-high { background: var(--success-soft); color: var(--success); }
.pill-mid  { background: var(--amber-soft); color: #8a6100; }
.pill-low  { background: var(--danger-soft); color: var(--danger); }
.source-text { font-size: 0.79rem; color: var(--muted); margin-top: 0.3rem; white-space: pre-wrap; word-break: break-word; }
.usage-caption { margin-top: 0.6rem; font-size: 0.72rem; font-weight: 600; color: var(--muted); }

/* classification + group tags (shared by source cards and doc list) */
.tag { display: inline-block; font-size: 0.6rem; font-weight: 800; letter-spacing: 0.04em; border-radius: 6px; padding: 0.1rem 0.4rem; text-transform: uppercase; }
.tag-public { background: var(--success-soft); color: var(--success); }
.tag-internal { background: var(--violet-100); color: var(--violet-900); }
.tag-confidential { background: var(--confidential-soft); color: var(--confidential); }
.tag-group { background: var(--amber-soft); color: #8a6100; text-transform: none; letter-spacing: 0; font-weight: 700; }
.tag-open { background: var(--teal-soft); color: var(--teal); text-transform: none; letter-spacing: 0; font-weight: 700; }

.chat-input-bar { display: flex; align-items: flex-end; gap: 0.6rem; border: 1px solid var(--border-strong); background: var(--surface); border-radius: var(--radius); padding: 0.55rem 0.6rem; flex-shrink: 0; box-shadow: var(--shadow-md); padding-bottom: calc(0.55rem + env(safe-area-inset-bottom)); }
.chat-input-bar textarea { border: none; background: transparent; resize: none; max-height: 140px; padding: 0.35rem 0.3rem; }
.chat-input-bar textarea:focus { box-shadow: none; }
.send-btn { flex-shrink: 0; width: 42px; height: 42px; border-radius: 50%; border: none; background: var(--coral); color: #fff; display: flex; align-items: center; justify-content: center; transition: background 0.15s ease; }
.send-btn:hover { background: var(--coral-dark); }
.send-btn:disabled { opacity: 0.5; }

/* ==========================================================================
   Knowledge base
   ========================================================================== */
.dropzone { border: 1.5px dashed var(--border-strong); border-radius: var(--radius); padding: 1.3rem 1rem; text-align: center; color: var(--muted); transition: border-color 0.15s ease, background 0.15s ease; cursor: pointer; }
.dropzone:hover { border-color: var(--plum); }
.dropzone.drag-over { border-color: var(--coral); background: var(--coral-soft); }
.dropzone-inner svg { color: var(--plum); margin-bottom: 0.3rem; }
.file-chip-row { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.7rem; }
.file-chip { display: flex; align-items: center; gap: 0.45rem; background: var(--violet-100); border-radius: 999px; padding: 0.28rem 0.7rem; font-size: 0.76rem; font-weight: 600; color: var(--violet-900); max-width: 100%; }
.file-chip span.name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 170px; }
.file-chip button { background: none; border: none; color: var(--plum); font-size: 0.9rem; line-height: 1; padding: 0; }
.file-chip button:hover { color: var(--danger); }
.progress-wrap { margin: 0.9rem 0 0; }
.progress-bar { height: 8px; border-radius: 999px; background: var(--border); overflow: hidden; }
.progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--coral), var(--amber)); transition: width 0.3s ease; }

.doc-head { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; }
.doc-count { font-size: 0.72rem; font-weight: 800; color: var(--plum); background: var(--violet-100); border-radius: 999px; padding: 0.12rem 0.55rem; }
.doc-list { display: flex; flex-direction: column; gap: 0.55rem; margin-top: 0.4rem; }
.doc-item { display: flex; align-items: flex-start; gap: 0.7rem; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.7rem 0.85rem; background: var(--bg); }
.doc-item.locked { opacity: 0.72; }
.doc-icon { flex-shrink: 0; width: 30px; height: 30px; border-radius: 8px; display: flex; align-items: center; justify-content: center; background: var(--violet-100); color: var(--violet-900); }
.doc-item.locked .doc-icon { background: var(--confidential-soft); color: var(--confidential); }
.doc-body { flex: 1; min-width: 0; }
.doc-name { font-size: 0.85rem; font-weight: 700; color: var(--ink); word-break: break-word; }
.doc-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 0.35rem; align-items: center; }
.doc-chunks { font-size: 0.68rem; font-weight: 600; color: var(--muted); }
.doc-del { flex-shrink: 0; background: transparent; border: none; color: var(--muted); font-size: 0.9rem; padding: 0.2rem 0.4rem; border-radius: 6px; }
.doc-del:hover { color: var(--danger); background: var(--danger-soft); }
.empty-hint { color: var(--muted); font-size: 0.88rem; padding: 0.8rem 0.2rem; }

/* ==========================================================================
   Settings
   ========================================================================== */
.lock-wrap { display: flex; justify-content: center; padding: 2.5rem 0; }
.lock-card { width: min(100%, 400px); text-align: center; padding: 1.8rem 1.6rem; }
.lock-icon { width: 54px; height: 54px; border-radius: 50%; background: var(--violet-100); color: var(--violet-900); display: flex; align-items: center; justify-content: center; margin: 0 auto 0.9rem; }
.lock-card h3 { font-size: 1.05rem; }
.lock-card .field > span { text-align: left; }
.lock-card form { margin-top: 1rem; text-align: left; }
.settings-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 0.9rem; }
.settings-head-text { min-width: 0; }
.settings-title { font-size: 1.15rem; font-weight: 800; margin-bottom: 0.2rem; }
.settings-head .page-lede { margin-bottom: 0; }
.settings-head .btn { flex-shrink: 0; }
.config-summary { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.6rem; margin-bottom: 1rem; }
.cfg-item { display: flex; align-items: center; gap: 0.6rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.7rem 0.85rem; box-shadow: var(--shadow-sm); }
.cfg-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border-strong); flex-shrink: 0; }
.cfg-dot.ok { background: var(--success); box-shadow: 0 0 0 3px var(--success-soft); }
.cfg-dot.bad { background: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }
.cfg-meta { display: flex; flex-direction: column; min-width: 0; line-height: 1.3; }
.cfg-label { font-size: 0.64rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.cfg-value { font-size: 0.82rem; font-weight: 700; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; margin-top: 0.3rem; }
.conn-result { font-size: 0.78rem; font-weight: 700; }
.conn-result.testing { color: var(--muted); }
.conn-result.ok { color: var(--success); }
.conn-result.err { color: var(--danger); }
.input-wrap { position: relative; display: block; }
.input-wrap input { padding-right: 2.6rem; }
.pw-toggle { position: absolute; top: 50%; right: 0.5rem; transform: translateY(-50%); background: transparent; border: none; color: var(--muted); display: flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 6px; padding: 0; }
.pw-toggle:hover { color: var(--plum); background: var(--violet-100); }
.pw-toggle.on { color: var(--plum); }

.footer { text-align: center; font-size: 0.72rem; color: var(--muted); padding: 1.1rem 1rem 1.4rem; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (min-width: 900px) {
  .only-mobile { display: none; }
  .nav-rail { transform: none; position: sticky; top: 0; height: 100vh; flex-shrink: 0; }
  .backdrop { display: none; }
  .content { padding: 1.6rem 2rem 2.4rem; }
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .config-summary { grid-template-columns: repeat(4, 1fr); }
  .sources-grid { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }
  .params-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chat-layout { grid-template-columns: 270px minmax(0, 1fr); }
  .bubble { max-width: 74%; }
  .msg-assistant .bubble { max-width: 92%; }
}
@media (min-width: 1280px) {
  .content { max-width: 1200px; }
  .params-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 899px) {
  .chat-layout { height: auto; display: block; }
  .thread-pane { max-height: 320px; margin-bottom: 1rem; }
  .chat-main { height: calc(100vh - var(--topbar-h) - 360px); min-height: 380px; }
}
@media (max-width: 480px) {
  .chip-model { display: none; }
  .page-title { font-size: 0.98rem; }
  .content { padding: 1rem 0.85rem 1.6rem; }
}