/* Northfield Mechanical — Knowledge Assistant (sample). All selectors scoped to .sb-doc-assistant */
.sb-doc-assistant {
  --da-bg: #f6f7f9;
  --da-panel: #ffffff;
  --da-border: #e4e6eb;
  --da-border-strong: #d3d7de;
  --da-text: #161a21;
  --da-muted: #5a6270;
  --da-faint: #8a919d;
  --da-accent: #1d5bbf;
  --da-accent-hover: #174c9f;
  --da-accent-weak: #eaf1fc;
  --da-accent-ink: #164a9c;
  --da-brand-2: #d9531e;
  --da-ok: #157a3c;
  --da-ok-weak: #e8f6ee;
  --da-warn-ink: #8a3b0c;
  --da-warn-bg: #fff7ed;
  --da-warn-border: #f5c291;
  --da-mark: #fde58a;
  --da-radius: 10px;
  --da-shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  --da-shadow-lg: 0 12px 32px rgba(16, 24, 40, .16), 0 2px 6px rgba(16, 24, 40, .08);

  position: relative;
  display: flex;
  flex-direction: column;
  height: 680px;
  overflow: hidden;
  background: var(--da-bg);
  color: var(--da-text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.45;
  text-align: left;
  container-type: inline-size;
  container-name: da;
  -webkit-font-smoothing: antialiased;
}
.sb-doc-assistant *,
.sb-doc-assistant *::before,
.sb-doc-assistant *::after { box-sizing: border-box; }
.sb-doc-assistant h2,
.sb-doc-assistant h3,
.sb-doc-assistant p,
.sb-doc-assistant ul,
.sb-doc-assistant ol { margin: 0; padding: 0; }
.sb-doc-assistant ul { list-style: none; }
.sb-doc-assistant button,
.sb-doc-assistant input,
.sb-doc-assistant textarea { font: inherit; color: inherit; }
.sb-doc-assistant button { cursor: pointer; }
.sb-doc-assistant button:disabled { cursor: not-allowed; }
.sb-doc-assistant svg { width: 16px; height: 16px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.sb-doc-assistant :focus-visible { outline: 2px solid var(--da-accent); outline-offset: 2px; border-radius: 6px; }
.sb-doc-assistant .da-vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.sb-doc-assistant [hidden] { display: none !important; }

/* ---------- Top bar ---------- */
.sb-doc-assistant .da-top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  height: 56px; padding: 0 16px; flex: none;
  background: var(--da-panel); border-bottom: 1px solid var(--da-border);
}
.sb-doc-assistant .da-brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.sb-doc-assistant .da-mono {
  display: grid; place-items: center; width: 32px; height: 32px; flex: none;
  border-radius: 8px; color: #fff; font-weight: 700; font-size: 13px; letter-spacing: .02em;
  background: linear-gradient(135deg, var(--da-accent) 0%, #2a73de 55%, var(--da-brand-2) 140%);
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.12);
}
.sb-doc-assistant .da-brand-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.2; }
.sb-doc-assistant .da-brand-name { font-weight: 650; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sb-doc-assistant .da-brand-sub { font-size: 12px; color: var(--da-muted); white-space: nowrap; }
.sb-doc-assistant .da-top-right { display: flex; align-items: center; gap: 12px; flex: none; }
.sb-doc-assistant .da-role {
  display: inline-flex; padding: 3px; gap: 2px; border-radius: 8px;
  background: #eef0f3; border: 1px solid var(--da-border);
}
.sb-doc-assistant .da-role-btn {
  border: 0; background: transparent; padding: 5px 12px; border-radius: 6px;
  font-size: 13px; font-weight: 550; color: var(--da-muted);
}
.sb-doc-assistant .da-role-btn:hover { color: var(--da-text); }
.sb-doc-assistant .da-role-btn[aria-pressed="true"] { background: var(--da-panel); color: var(--da-text); box-shadow: var(--da-shadow); }
.sb-doc-assistant .da-avatar {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%;
  background: #e9e3fb; color: #4b2fa6; font-size: 12px; font-weight: 650;
}

/* ---------- Mobile tabs ---------- */
.sb-doc-assistant .da-tabs { display: none; }

/* ---------- Main grid ---------- */
.sb-doc-assistant .da-main {
  flex: 1; min-height: 0;
  display: grid; grid-template-columns: 276px minmax(0, 1fr) 0px;
  transition: grid-template-columns .22s ease;
}
.sb-doc-assistant.is-src-open .da-main { grid-template-columns: 276px minmax(0, 1fr) 372px; }

/* ---------- Library ---------- */
.sb-doc-assistant .da-lib {
  display: flex; flex-direction: column; min-height: 0;
  background: var(--da-panel); border-right: 1px solid var(--da-border);
}
.sb-doc-assistant .da-lib-head { padding: 14px 14px 10px; display: flex; flex-direction: column; gap: 10px; }
.sb-doc-assistant .da-lib-title { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.sb-doc-assistant .da-lib-title h2 { font-size: 13px; font-weight: 650; white-space: nowrap; }
.sb-doc-assistant .da-lib-count { white-space: nowrap; font-size: 12px; color: var(--da-muted); font-variant-numeric: tabular-nums; }
.sb-doc-assistant .da-search {
  display: flex; align-items: center; gap: 6px; padding: 0 10px; height: 32px;
  border: 1px solid var(--da-border); border-radius: 8px; background: #fbfbfc; color: var(--da-faint);
}
.sb-doc-assistant .da-search:focus-within { border-color: var(--da-accent); box-shadow: 0 0 0 3px var(--da-accent-weak); }
.sb-doc-assistant .da-search input { border: 0; outline: 0; background: transparent; width: 100%; min-width: 0; font-size: 13px; color: var(--da-text); }
.sb-doc-assistant .da-search input::placeholder { color: var(--da-faint); }
.sb-doc-assistant .da-doclist { flex: 1; overflow-y: auto; padding: 2px 8px 8px; }
.sb-doc-assistant .da-doc {
  display: flex; gap: 10px; align-items: flex-start; width: 100%; text-align: left;
  padding: 8px; border: 1px solid transparent; border-radius: 8px; background: transparent;
}
.sb-doc-assistant .da-doc:hover { background: #f4f5f7; }
.sb-doc-assistant .da-doc[aria-current="true"] { background: var(--da-accent-weak); border-color: #cddcf5; }
.sb-doc-assistant .da-doc-ico {
  display: grid; place-items: center; width: 28px; height: 32px; flex: none; border-radius: 5px;
  font-size: 9px; font-weight: 700; letter-spacing: .03em; color: #fff; position: relative;
}
.sb-doc-assistant .da-doc-body { min-width: 0; flex: 1; }
.sb-doc-assistant .da-doc-title { display: block; font-size: 13px; font-weight: 560; line-height: 1.3; color: var(--da-text); }
.sb-doc-assistant .da-doc-meta { display: block; margin-top: 2px; font-size: 11.5px; color: var(--da-muted); font-variant-numeric: tabular-nums; }
.sb-doc-assistant .da-doc-new { color: var(--da-ok); font-weight: 600; }
.sb-doc-assistant .da-empty-list { padding: 18px 10px; font-size: 13px; color: var(--da-muted); text-align: center; }
.sb-doc-assistant .da-upload {
  margin: 8px 12px 12px; padding: 12px; display: flex; gap: 10px; align-items: center;
  border: 1.5px dashed var(--da-border-strong); border-radius: 10px; background: #fafbfc; color: var(--da-muted);
  transition: background .15s, border-color .15s;
}
.sb-doc-assistant .da-upload.is-drag { background: var(--da-accent-weak); border-color: var(--da-accent); }
.sb-doc-assistant .da-upload > svg { width: 20px; height: 20px; color: var(--da-accent); }
.sb-doc-assistant .da-upload-text { display: flex; flex-direction: column; gap: 1px; font-size: 11.5px; line-height: 1.35; }
.sb-doc-assistant .da-upload-btn {
  align-self: flex-start; padding: 0; border: 0; background: none;
  color: var(--da-accent); font-weight: 600; font-size: 13px;
}
.sb-doc-assistant .da-upload-btn:hover { text-decoration: underline; }

/* ---------- Chat ---------- */
.sb-doc-assistant .da-chat { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.sb-doc-assistant .da-chat-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 18px; min-height: 52px; border-bottom: 1px solid var(--da-border); background: rgba(255,255,255,.6);
}
.sb-doc-assistant .da-chat-title { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; min-width: 0; }
.sb-doc-assistant .da-chat-title h2 { font-size: 14px; font-weight: 650; white-space: nowrap; }
.sb-doc-assistant.is-src-open .da-chat-title h2 { display: none; }
.sb-doc-assistant .da-brand-short { display: none; }
.sb-doc-assistant .da-grounded {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px 3px 7px;
  border-radius: 999px; background: var(--da-ok-weak); color: var(--da-ok);
  font-size: 12px; font-weight: 560; border: 1px solid #c7e9d4; white-space: nowrap;
}
.sb-doc-assistant .da-grounded svg { width: 14px; height: 14px; }
.sb-doc-assistant .da-ghost {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; flex: none;
  border: 1px solid var(--da-border); border-radius: 8px; background: var(--da-panel);
  font-size: 12.5px; font-weight: 550; color: var(--da-text);
}
.sb-doc-assistant .da-ghost:hover { background: #f4f5f7; }

.sb-doc-assistant .da-thread { flex: 1; overflow-y: auto; padding: 18px 18px 8px; display: flex; flex-direction: column; gap: 16px; scroll-behavior: auto; }

/* welcome */
.sb-doc-assistant .da-welcome { margin: auto 0; padding: 8px 0 12px; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 10px; }
.sb-doc-assistant .da-welcome-ico {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px;
  background: var(--da-accent-weak); color: var(--da-accent);
}
.sb-doc-assistant .da-welcome-ico svg { width: 22px; height: 22px; }
.sb-doc-assistant .da-welcome h3 { font-size: 17px; font-weight: 650; }
.sb-doc-assistant .da-welcome p { max-width: 460px; color: var(--da-muted); font-size: 13.5px; }
.sb-doc-assistant .da-welcome-chips { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; width: 100%; max-width: 560px; margin-top: 8px; }
.sb-doc-assistant .da-welcome-for { font-size: 11.5px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--da-faint); margin-top: 6px; }
.sb-doc-assistant .da-qchip {
  display: flex; align-items: center; gap: 8px; text-align: left; width: 100%;
  padding: 9px 11px; border-radius: 9px; border: 1px solid var(--da-border); background: var(--da-panel);
  font-size: 13px; line-height: 1.3; color: var(--da-text); box-shadow: 0 1px 1px rgba(16,24,40,.03);
}
.sb-doc-assistant .da-qchip:hover { border-color: #bcd0f0; background: #fbfcff; }
.sb-doc-assistant .da-qchip svg { color: var(--da-accent); width: 14px; height: 14px; }
.sb-doc-assistant .da-qchip.is-probe svg { color: var(--da-brand-2); }

/* messages */
.sb-doc-assistant .da-msg { display: flex; gap: 10px; align-items: flex-start; max-width: 100%; }
.sb-doc-assistant .da-msg-user { justify-content: flex-end; }
.sb-doc-assistant .da-bubble-user {
  max-width: min(78%, 520px); padding: 9px 13px; border-radius: 14px 14px 4px 14px;
  background: var(--da-accent); color: #fff; font-size: 14px; overflow-wrap: anywhere;
}
.sb-doc-assistant .da-msg-ai .da-bot {
  display: grid; place-items: center; width: 28px; height: 28px; flex: none; border-radius: 8px;
  background: #fff; border: 1px solid var(--da-border); color: var(--da-accent); margin-top: 2px;
}
.sb-doc-assistant .da-msg-ai .da-bot svg { width: 15px; height: 15px; }
.sb-doc-assistant .da-ai-card {
  flex: 1; min-width: 0; max-width: 640px; background: var(--da-panel); border: 1px solid var(--da-border);
  border-radius: 4px 14px 14px 14px; padding: 12px 14px; box-shadow: var(--da-shadow);
}
.sb-doc-assistant .da-ai-meta { display: flex; align-items: center; gap: 8px; font-size: 11.5px; color: var(--da-muted); margin-bottom: 6px; font-variant-numeric: tabular-nums; }
.sb-doc-assistant .da-ai-meta b { color: var(--da-text); font-weight: 600; }
.sb-doc-assistant .da-answer { font-size: 14px; line-height: 1.55; overflow-wrap: anywhere; }
.sb-doc-assistant .da-answer p + p,
.sb-doc-assistant .da-answer p + ul,
.sb-doc-assistant .da-answer ul + p { margin-top: 8px; }
.sb-doc-assistant .da-answer ul { list-style: disc; padding-left: 20px; }
.sb-doc-assistant .da-answer li + li { margin-top: 3px; }
.sb-doc-assistant .da-answer strong { font-weight: 640; }
.sb-doc-assistant .da-cite-inline {
  display: inline-grid; place-items: center; min-width: 18px; height: 18px; padding: 0 4px; margin: 0 1px;
  border-radius: 5px; border: 1px solid #c9d8f2; background: var(--da-accent-weak); color: var(--da-accent-ink);
  font-size: 11px; font-weight: 650; line-height: 1; vertical-align: 2px; font-variant-numeric: tabular-nums;
}
.sb-doc-assistant .da-cite-inline:hover,
.sb-doc-assistant .da-cite-inline.is-active { background: var(--da-accent); border-color: var(--da-accent); color: #fff; }
.sb-doc-assistant .da-sources { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--da-border); }
.sb-doc-assistant .da-sources-label { font-size: 11px; font-weight: 650; letter-spacing: .05em; text-transform: uppercase; color: var(--da-faint); margin-bottom: 6px; }
.sb-doc-assistant .da-sources-row { display: flex; flex-wrap: wrap; gap: 6px; }
.sb-doc-assistant .da-cite {
  display: inline-flex; align-items: center; gap: 7px; max-width: 100%;
  padding: 4px 9px 4px 4px; border-radius: 7px; border: 1px solid var(--da-border); background: #fafbfc;
  font-size: 12.5px; color: var(--da-text); text-align: left;
}
.sb-doc-assistant .da-cite:hover { border-color: #bcd0f0; background: var(--da-accent-weak); }
.sb-doc-assistant .da-cite.is-active { border-color: var(--da-accent); background: var(--da-accent-weak); box-shadow: 0 0 0 2px var(--da-accent-weak); }
.sb-doc-assistant .da-cite-n {
  display: grid; place-items: center; width: 20px; height: 20px; flex: none; border-radius: 5px;
  background: var(--da-accent); color: #fff; font-size: 11px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.sb-doc-assistant .da-cite-t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sb-doc-assistant .da-cite-t span { color: var(--da-muted); }
.sb-doc-assistant .da-ai-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.sb-doc-assistant .da-helpful { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--da-muted); }
.sb-doc-assistant .da-thumb {
  display: grid; place-items: center; width: 28px; height: 28px; border-radius: 7px;
  border: 1px solid transparent; background: transparent; color: var(--da-muted);
}
.sb-doc-assistant .da-thumb:hover { background: #f1f2f5; color: var(--da-text); }
.sb-doc-assistant .da-thumb[aria-pressed="true"] { background: var(--da-accent-weak); color: var(--da-accent); border-color: #c9d8f2; }
.sb-doc-assistant .da-thumb[data-v="down"][aria-pressed="true"] { background: #fdf0ea; color: #b4441a; border-color: #f3cdb9; }
.sb-doc-assistant .da-scope { font-size: 11.5px; color: var(--da-faint); font-variant-numeric: tabular-nums; }

/* thinking */
.sb-doc-assistant .da-thinking { display: flex; align-items: center; gap: 8px; color: var(--da-muted); font-size: 13px; }
.sb-doc-assistant .da-dots { display: inline-flex; gap: 3px; }
.sb-doc-assistant .da-dots i { width: 5px; height: 5px; border-radius: 50%; background: var(--da-accent); opacity: .35; animation: da-pulse 1s infinite ease-in-out; }
.sb-doc-assistant .da-dots i:nth-child(2) { animation-delay: .15s; }
.sb-doc-assistant .da-dots i:nth-child(3) { animation-delay: .3s; }
@keyframes da-pulse { 0%, 100% { opacity: .25; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-2px); } }

/* not found */
.sb-doc-assistant .da-ai-card.is-miss { border-color: var(--da-warn-border); background: linear-gradient(0deg, #fff, #fffaf4); }
.sb-doc-assistant .da-miss-badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 2px 8px; border-radius: 999px;
  background: var(--da-warn-bg); color: var(--da-warn-ink); border: 1px solid var(--da-warn-border); font-size: 11.5px; font-weight: 600;
}
.sb-doc-assistant .da-miss-badge svg { width: 13px; height: 13px; }
.sb-doc-assistant .da-contact {
  display: flex; align-items: center; gap: 10px; margin-top: 10px; padding: 9px 11px;
  border: 1px solid var(--da-border); border-radius: 9px; background: #fff;
}
.sb-doc-assistant .da-contact-av { display: grid; place-items: center; width: 32px; height: 32px; flex: none; border-radius: 50%; font-size: 12px; font-weight: 650; }
.sb-doc-assistant .da-contact-body { min-width: 0; font-size: 13px; line-height: 1.3; }
.sb-doc-assistant .da-contact-body b { display: block; font-weight: 620; }
.sb-doc-assistant .da-contact-body span { color: var(--da-muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.sb-doc-assistant .da-searched { margin-top: 8px; font-size: 12px; color: var(--da-muted); }

/* suggestion strip */
.sb-doc-assistant .da-suggest { display: flex; align-items: center; gap: 8px; padding: 6px 18px 0; min-width: 0; }
.sb-doc-assistant .da-suggest-label { font-size: 11.5px; font-weight: 600; color: var(--da-faint); flex: none; }
.sb-doc-assistant .da-suggest-row { display: flex; gap: 6px; overflow-x: auto; min-width: 0; padding: 3px 2px 5px; scrollbar-width: thin; }
.sb-doc-assistant .da-schip {
  flex: none; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--da-border); background: var(--da-panel);
  font-size: 12.5px; color: var(--da-text); white-space: nowrap;
}
.sb-doc-assistant .da-schip:hover { border-color: #bcd0f0; background: var(--da-accent-weak); }

/* composer */
.sb-doc-assistant .da-composer {
  display: flex; align-items: flex-end; gap: 8px; margin: 6px 18px 0; padding: 7px 7px 7px 13px;
  border: 1px solid var(--da-border-strong); border-radius: 12px; background: var(--da-panel); box-shadow: var(--da-shadow);
}
.sb-doc-assistant .da-composer:focus-within { border-color: var(--da-accent); box-shadow: 0 0 0 3px var(--da-accent-weak); }
.sb-doc-assistant .da-composer textarea {
  flex: 1; min-width: 0; border: 0; outline: 0; resize: none; background: transparent;
  font-size: 14px; line-height: 1.45; padding: 6px 0; max-height: 110px;
}
.sb-doc-assistant .da-composer textarea::placeholder { color: var(--da-faint); }
.sb-doc-assistant .da-send {
  display: grid; place-items: center; width: 34px; height: 34px; flex: none; border: 0; border-radius: 9px;
  background: var(--da-accent); color: #fff;
}
.sb-doc-assistant .da-send:hover { background: var(--da-accent-hover); }
.sb-doc-assistant .da-send:disabled { background: #b9c6db; }
.sb-doc-assistant .da-send svg { width: 17px; height: 17px; stroke-width: 2.2; }
.sb-doc-assistant .da-composer-note { padding: 6px 18px 10px; font-size: 11.5px; color: var(--da-muted); text-align: center; }

/* ---------- Source viewer ---------- */
.sb-doc-assistant .da-src {
  min-width: 0; min-height: 0; overflow: hidden; display: flex; flex-direction: column;
  background: var(--da-panel); border-left: 1px solid var(--da-border);
}
.sb-doc-assistant:not(.is-src-open) .da-src { border-left: 0; visibility: hidden; }
.sb-doc-assistant .da-src-empty { margin: auto; padding: 24px; text-align: center; color: var(--da-muted); font-size: 13px; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.sb-doc-assistant .da-src-empty svg { width: 28px; height: 28px; color: var(--da-faint); }
.sb-doc-assistant .da-src-body { display: flex; flex-direction: column; min-height: 0; flex: 1; }
.sb-doc-assistant .da-src-head { padding: 12px 14px 12px 16px; border-bottom: 1px solid var(--da-border); display: flex; gap: 10px; align-items: flex-start; }
.sb-doc-assistant .da-src-head .da-doc-ico { margin-top: 2px; }
.sb-doc-assistant .da-src-titles { flex: 1; min-width: 0; }
.sb-doc-assistant .da-src-kicker { font-size: 11px; font-weight: 650; letter-spacing: .05em; text-transform: uppercase; color: var(--da-faint); }
.sb-doc-assistant .da-src-titles h3 { font-size: 14.5px; font-weight: 650; line-height: 1.3; margin: 1px 0 3px; }
.sb-doc-assistant .da-src-meta { font-size: 12px; color: var(--da-muted); font-variant-numeric: tabular-nums; }
.sb-doc-assistant .da-icon-btn {
  display: grid; place-items: center; width: 30px; height: 30px; flex: none; border-radius: 8px;
  border: 1px solid transparent; background: transparent; color: var(--da-muted);
}
.sb-doc-assistant .da-icon-btn:hover { background: #f1f2f5; color: var(--da-text); }
.sb-doc-assistant .da-src-cited {
  margin: 10px 14px 0; padding: 8px 10px; border-radius: 8px; background: var(--da-accent-weak);
  font-size: 12px; color: var(--da-accent-ink); display: flex; gap: 6px; align-items: center;
}
.sb-doc-assistant .da-src-cited svg { width: 14px; height: 14px; }
.sb-doc-assistant .da-src-scroll { flex: 1; overflow-y: auto; padding: 10px 14px 24px; position: relative; }
.sb-doc-assistant .da-sec { padding: 10px 12px; border-radius: 8px; border-left: 3px solid transparent; }
.sb-doc-assistant .da-sec + .da-sec { margin-top: 2px; }
.sb-doc-assistant .da-sec-h { display: flex; align-items: baseline; gap: 8px; margin-bottom: 4px; }
.sb-doc-assistant .da-sec-n { font-size: 12px; font-weight: 700; color: var(--da-accent-ink); font-variant-numeric: tabular-nums; flex: none; }
.sb-doc-assistant .da-sec-t { font-size: 13.5px; font-weight: 620; flex: 1; }
.sb-doc-assistant .da-sec-p { font-size: 11px; color: var(--da-faint); flex: none; font-variant-numeric: tabular-nums; }
.sb-doc-assistant .da-sec-body { font-size: 13px; line-height: 1.6; color: #2b313b; }
.sb-doc-assistant .da-sec.is-cited { background: #fffbea; border-left-color: #e0b100; }
.sb-doc-assistant .da-sec mark {
  background: var(--da-mark); color: #1b1600; padding: 1px 2px; border-radius: 3px;
  box-shadow: 0 0 0 2px var(--da-mark); outline: none;
}
.sb-doc-assistant .da-sec mark.is-flash { animation: da-flash 1.2s ease-out 1; }
@keyframes da-flash { 0% { box-shadow: 0 0 0 6px #fbbf24; } 100% { box-shadow: 0 0 0 2px var(--da-mark); } }

/* ---------- Status bar ---------- */
.sb-doc-assistant .da-status {
  display: flex; align-items: center; justify-content: space-between; gap: 10px; flex: none;
  height: 28px; padding: 0 14px; border-top: 1px solid var(--da-border); background: var(--da-panel);
  font-size: 11.5px; color: var(--da-muted); font-variant-numeric: tabular-nums;
}
.sb-doc-assistant .da-sample-tag { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.sb-doc-assistant .da-sample-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #b8bec8; }
.sb-doc-assistant .da-status-right { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sb-doc-assistant .da-status-right::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #22a55a; flex: none; }

/* ---------- Toast ---------- */
.sb-doc-assistant .da-toast {
  position: absolute; left: 50%; bottom: 40px; z-index: 30; transform: translate(-50%, 8px);
  max-width: calc(100% - 32px); padding: 9px 14px; border-radius: 9px;
  background: #1c212b; color: #fff; font-size: 13px; box-shadow: var(--da-shadow-lg);
  opacity: 0; pointer-events: none; transition: opacity .18s, transform .18s; text-align: center;
}
.sb-doc-assistant .da-toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Medium widths: source overlays chat ---------- */
@container da (max-width: 1000px) {
  .sb-doc-assistant .da-main,
  .sb-doc-assistant.is-src-open .da-main { grid-template-columns: 248px minmax(0, 1fr); position: relative; }
  .sb-doc-assistant .da-src {
    position: absolute; top: 0; right: 0; bottom: 0; width: min(380px, 100%); z-index: 20;
    box-shadow: var(--da-shadow-lg); transform: translateX(105%); transition: transform .22s ease;
  }
  .sb-doc-assistant.is-src-open .da-src { transform: translateX(0); }
}

/* ---------- Narrow: tabbed panels ---------- */
@container da (max-width: 720px) {
  .sb-doc-assistant .da-top { padding: 0 12px; height: 52px; }
  .sb-doc-assistant .da-brand-sub { display: none; }
  .sb-doc-assistant .da-avatar { display: none; }
  .sb-doc-assistant .da-role-btn { padding: 5px 9px; font-size: 12.5px; }
  .sb-doc-assistant .da-tabs {
    display: flex; flex: none; gap: 2px; padding: 0 8px; background: var(--da-panel); border-bottom: 1px solid var(--da-border);
  }
  .sb-doc-assistant .da-tab {
    flex: 1; padding: 9px 6px; border: 0; background: none; border-bottom: 2px solid transparent;
    font-size: 13px; font-weight: 580; color: var(--da-muted);
  }
  .sb-doc-assistant .da-tab[aria-pressed="true"] { color: var(--da-accent); border-bottom-color: var(--da-accent); }
  .sb-doc-assistant .da-tab:disabled { color: #b3b8c1; }
  .sb-doc-assistant .da-main,
  .sb-doc-assistant.is-src-open .da-main { display: block; position: relative; }
  .sb-doc-assistant .da-lib,
  .sb-doc-assistant .da-chat,
  .sb-doc-assistant .da-src { display: none; height: 100%; border: 0; }
  .sb-doc-assistant[data-view="library"] .da-lib { display: flex; }
  .sb-doc-assistant[data-view="chat"] .da-chat { display: flex; }
  .sb-doc-assistant[data-view="source"] .da-src {
    display: flex; position: static; width: auto; transform: none; box-shadow: none; visibility: visible;
  }
  .sb-doc-assistant .da-chat-head { padding: 8px 12px; min-height: 0; }
  .sb-doc-assistant .da-chat-title h2 { display: none; }
  .sb-doc-assistant .da-thread { padding: 14px 12px 6px; }
  .sb-doc-assistant .da-welcome-chips { grid-template-columns: minmax(0, 1fr); }
  .sb-doc-assistant .da-msg-ai .da-bot { display: none; }
  .sb-doc-assistant .da-bubble-user { max-width: 88%; }
  .sb-doc-assistant .da-suggest { padding: 6px 12px 0; }
  .sb-doc-assistant .da-composer { margin: 6px 12px 0; }
  .sb-doc-assistant .da-composer-note { padding: 5px 12px 8px; }
  .sb-doc-assistant .da-status-right { display: none; }
}
@container da (max-width: 400px) {
  .sb-doc-assistant .da-brand-name { display: none; }
  .sb-doc-assistant .da-brand-short { display: inline; font-weight: 650; font-size: 14px; white-space: nowrap; }
  .sb-doc-assistant .da-ghost span { display: none; }
  .sb-doc-assistant .da-composer-note { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .sb-doc-assistant .da-main,
  .sb-doc-assistant .da-src,
  .sb-doc-assistant .da-toast { transition: none; }
  .sb-doc-assistant .da-dots i,
  .sb-doc-assistant .da-sec mark.is-flash { animation: none; }
}