/* ==========================================================================
   Lattice Design System — warm paper light / deep ink dark, iris accent
   ========================================================================== */
:root {
  /* palette */
  --bg: #f4f2ec;
  --bg-elev: #faf9f5;
  --panel: #fffefb;
  --panel-2: #f7f5ef;
  --border: #e6e2d8;
  --border-strong: #d5d0c2;
  --text: #201e1a;
  --text-2: #55524a;
  --muted: #8a867a;
  --accent: #5a55d2;
  --accent-2: #7a72e8;
  --accent-ink: #453fb8;
  --accent-soft: #ecebfa;
  --accent-soft-2: #e0defa;
  --on-accent: #ffffff;
  --danger: #c0453c;
  --danger-soft: #faeceb;
  --ok: #2f7d54;
  --ok-soft: #e7f3ec;
  --warn: #a06b1e;
  --warn-soft: #faf3e3;
  --mark: #f9edb1;

  /* shape & effects */
  --radius-s: 8px;
  --radius: 12px;
  --radius-l: 18px;
  --shadow-1: 0 1px 2px rgba(32, 28, 16, .05), 0 1px 6px rgba(32, 28, 16, .04);
  --shadow-2: 0 2px 6px rgba(32, 28, 16, .07), 0 10px 28px rgba(32, 28, 16, .08);
  --shadow-pop: 0 6px 16px rgba(28, 24, 12, .12), 0 24px 60px rgba(28, 24, 12, .18);

  /* layout */
  --nav-w: 232px;
  --ctx-w: 360px;

  --font: -apple-system, BlinkMacSystemFont, "Pretendard Variable", Pretendard,
          "Apple SD Gothic Neo", "Noto Sans KR", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16151a;
    --bg-elev: #1b1a20;
    --panel: #201f26;
    --panel-2: #26252d;
    --border: #32303a;
    --border-strong: #45424f;
    --text: #eceaf2;
    --text-2: #b6b3c2;
    --muted: #817e8f;
    --accent: #8b85f0;
    --accent-2: #a49ef5;
    --accent-ink: #b9b4f8;
    --accent-soft: #2b2940;
    --accent-soft-2: #35325230;
    --on-accent: #16151a;
    --danger: #e07a72;
    --danger-soft: #3a2523;
    --ok: #6fbf94;
    --ok-soft: #1f3229;
    --warn: #d9a95c;
    --warn-soft: #363021;
    --mark: #5b512b;
    --shadow-1: 0 1px 2px rgba(0, 0, 0, .35);
    --shadow-2: 0 2px 8px rgba(0, 0, 0, .4), 0 12px 32px rgba(0, 0, 0, .35);
    --shadow-pop: 0 8px 20px rgba(0, 0, 0, .5), 0 28px 70px rgba(0, 0, 0, .5);
  }
}

/* base ------------------------------------------------------------------ */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1 { font-size: 24px; font-weight: 750; letter-spacing: -0.02em; margin: 0 0 18px; }
h2 { font-size: 15px; font-weight: 700; letter-spacing: -0.01em; margin: 28px 0 10px; color: var(--text-2); text-transform: none; }
h3 { font-size: 12.5px; font-weight: 650; margin: 18px 0 6px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
code { font-family: var(--font-mono); font-size: .88em; background: var(--panel-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 5px; }
mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 2px; }
::selection { background: var(--accent-soft-2); }
.muted { color: var(--muted); font-size: 13px; }

/* controls ---------------------------------------------------------------- */
button {
  font: inherit; font-weight: 550; cursor: pointer;
  border: 1px solid var(--border-strong);
  background: var(--panel); color: var(--text);
  border-radius: 9px; padding: 6px 14px;
  transition: border-color .15s, background .15s, transform .05s, box-shadow .15s;
  box-shadow: var(--shadow-1);
}
button:hover { border-color: var(--accent); color: var(--accent-ink); }
button:active { transform: translateY(1px); }
button.primary {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: var(--on-accent); border-color: transparent; font-weight: 650;
}
button.primary:hover { filter: brightness(1.06); color: var(--on-accent); }
button.danger { color: var(--danger); }
button.danger:hover { border-color: var(--danger); background: var(--danger-soft); }
button.ghost { border-color: transparent; box-shadow: none; background: transparent; }
button.ghost:hover { background: var(--accent-soft); }
button:disabled { opacity: .55; cursor: default; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
input, textarea, select {
  font: inherit; color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: 9px; padding: 8px 12px;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}
textarea { resize: vertical; line-height: 1.6; }
input::placeholder, textarea::placeholder { color: var(--muted); }
kbd {
  font-family: var(--font); font-size: 11px; color: var(--muted);
  border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 5px;
  padding: 0 5px; background: var(--panel);
}
input[type="checkbox"] { accent-color: var(--accent); width: 15px; height: 15px; }

/* custom dropdown (native select replacement) ------------------------------ */
.dd { position: relative; display: inline-block; }
.dd > select { display: none; }
.dd-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; font-weight: 550; max-width: 320px;
}
.dd-btn .dd-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dd-btn .chev { width: 13px; height: 13px; opacity: .55; flex-shrink: 0; transition: transform .15s; }
.dd-btn[aria-expanded="true"] .chev { transform: rotate(180deg); }
.dd-menu {
  position: absolute; top: calc(100% + 6px); left: 0; z-index: 95;
  min-width: max(100%, 180px); max-height: 320px; overflow-y: auto;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 12px; padding: 5px;
  box-shadow: var(--shadow-pop);
  animation: popIn .13s cubic-bezier(.2, .9, .3, 1.15);
}
.dd-opt {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 11px; border-radius: 8px; cursor: pointer;
  font-size: 13.5px; font-weight: 500; color: var(--text-2);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.dd-opt:hover, .dd-opt.hover { background: var(--accent-soft); color: var(--accent-ink); }
.dd-opt.selected { color: var(--accent-ink); font-weight: 650; }
.dd-opt .tick { width: 14px; height: 14px; flex-shrink: 0; visibility: hidden; }
.dd-opt.selected .tick { visibility: visible; }

/* toggle chip ---------------------------------------------------------------- */
.chip-toggle {
  border-radius: 999px; font-size: 13px; padding: 5px 14px;
  color: var(--muted); box-shadow: none; font-weight: 550;
  display: inline-flex; align-items: center; gap: 7px;
}
.chip-toggle::before {
  content: ''; width: 7px; height: 7px; border-radius: 50%;
  background: var(--border-strong); transition: background .15s;
}
.chip-toggle.on {
  background: var(--accent-soft); color: var(--accent-ink);
  border-color: transparent; font-weight: 650;
}
.chip-toggle.on::before { background: var(--accent); }

/* badges ------------------------------------------------------------------ */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; font-weight: 600; letter-spacing: .01em;
  padding: 2px 9px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-2); background: var(--panel);
  white-space: nowrap;
}
.badge.ai { border-color: transparent; color: var(--warn); background: var(--warn-soft); }
.badge.ok { border-color: transparent; color: var(--ok); background: var(--ok-soft); }
.badge.err { border-color: transparent; color: var(--danger); background: var(--danger-soft); }
.badge.acc { border-color: transparent; color: var(--accent-ink); background: var(--accent-soft); }
a.badge.acc:hover { background: var(--accent-soft-2); text-decoration: none; }

/* layout ------------------------------------------------------------------ */
#app { display: flex; height: 100vh; }
.nav {
  width: var(--nav-w); flex-shrink: 0;
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 14px 12px; gap: 2px;
  background: var(--bg-elev);
  overflow-y: auto;
}
.nav .logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 17px; letter-spacing: -0.01em;
  padding: 6px 10px 18px;
}
.logo-mark {
  width: 28px; height: 28px; border-radius: 9px; flex-shrink: 0;
  background:
    radial-gradient(circle at 30% 25%, var(--accent-2), var(--accent) 70%);
  box-shadow: inset 0 1px 1px rgba(255,255,255,.35), var(--shadow-1);
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 14px; font-weight: 800;
}
.nav a.navlink {
  display: flex; align-items: center; gap: 11px;
  padding: 8px 11px; border-radius: 9px;
  color: var(--text-2); font-weight: 550; font-size: 14px;
  transition: background .12s, color .12s;
}
.nav a.navlink svg { width: 17px; height: 17px; opacity: .75; flex-shrink: 0; }
.nav a.navlink:hover { background: var(--panel-2); color: var(--text); text-decoration: none; }
.nav a.navlink.active { background: var(--accent-soft); color: var(--accent-ink); font-weight: 650; }
.nav a.navlink.active svg { opacity: 1; }
.nav .spacer { flex: 1; }
.main-wrap { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 22px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elev) 85%, transparent);
  backdrop-filter: blur(10px);
  position: relative; z-index: 20;
}
.topbar .searchbox {
  flex: 1; max-width: 520px;
  display: flex; align-items: center; gap: 9px;
  text-align: left; color: var(--muted); font-weight: 450;
  background: var(--panel); padding: 8px 14px;
  border-radius: 10px; border: 1px solid var(--border);
  box-shadow: none;
}
.topbar .searchbox:hover { border-color: var(--border-strong); color: var(--text-2); }
.topbar .searchbox svg { width: 15px; height: 15px; opacity: .6; }
.topbar .searchbox kbd { margin-left: auto; }
.content-row { flex: 1; display: flex; min-height: 0; }
.main { flex: 1; overflow-y: auto; padding: 28px 34px 48px; min-width: 0; scroll-behavior: smooth; }
.ctx-panel {
  width: var(--ctx-w); flex-shrink: 0;
  border-left: 1px solid var(--border);
  background: var(--bg-elev);
  overflow-y: auto; padding: 18px 20px;
  font-size: 13.5px;
}
.ctx-panel.hidden { display: none; }

/* cards & lists ------------------------------------------------------------ */
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; margin-bottom: 12px;
  box-shadow: var(--shadow-1);
}
.list-box {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-1);
}
.entry-row {
  display: block; padding: 13px 18px;
  color: var(--text); cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background .12s;
}
.list-box .entry-row:last-child { border-bottom: none; }
.entry-row:hover { background: var(--panel-2); text-decoration: none; }
.entry-row .title { font-weight: 640; letter-spacing: -0.01em; }
.entry-row .snippet {
  color: var(--muted); font-size: 13.5px; margin-top: 3px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.entry-row .meta { display: flex; gap: 7px; margin-top: 7px; flex-wrap: wrap; align-items: center; font-size: 12.5px; color: var(--muted); }

/* quick capture ------------------------------------------------------------ */
.capture-box { padding: 18px; }
.capture-box textarea {
  width: 100%; min-height: 116px; font-size: 15.5px;
  border: none; box-shadow: none; padding: 4px 2px; background: transparent;
}
.capture-box textarea:focus { box-shadow: none; }
.capture-box .row { display: flex; gap: 8px; margin-top: 10px; align-items: center; flex-wrap: wrap; border-top: 1px solid var(--border); padding-top: 12px; }
details.advanced { margin-top: 10px; }
details.advanced summary {
  cursor: pointer; color: var(--muted); font-size: 13px; user-select: none;
  list-style: none; display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 8px; border-radius: 7px; transition: background .12s, color .12s;
}
details.advanced summary::-webkit-details-marker { display: none; }
details.advanced summary::before {
  content: ''; width: 7px; height: 7px; flex-shrink: 0;
  border-right: 1.8px solid currentColor; border-bottom: 1.8px solid currentColor;
  transform: rotate(-45deg) translateY(-1px); transition: transform .15s;
}
details.advanced[open] summary::before { transform: rotate(45deg) translateY(-2px); }
details.advanced summary:hover { color: var(--text-2); background: var(--panel-2); }
details.advanced .adv-body { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }

/* overlays ------------------------------------------------------------------ */
.overlay {
  position: fixed; inset: 0; background: rgba(20, 16, 8, 0.45); z-index: 100;
  display: flex; align-items: flex-start; justify-content: center;
  padding: 9vh 16px 16px;
  backdrop-filter: blur(3px);
  animation: fadeIn .14s ease-out;
}
@keyframes fadeIn { from { opacity: 0; } }
.modal {
  background: var(--bg-elev); border-radius: 16px; border: 1px solid var(--border);
  width: 660px; max-width: 100%; max-height: 82vh; overflow-y: auto; padding: 18px;
  box-shadow: var(--shadow-pop);
  animation: popIn .16s cubic-bezier(.2, .9, .3, 1.2);
}
@keyframes popIn { from { opacity: 0; transform: scale(.97) translateY(6px); } }
.search-results .entry-row { border-radius: 10px; border-bottom: none; }
.search-results .entry-row.selected { background: var(--accent-soft); }

/* entry detail ------------------------------------------------------------ */
.entry-header { display: flex; align-items: flex-start; gap: 10px; flex-wrap: wrap; }
.entry-header h1 { flex: 1; min-width: 220px; margin-bottom: 4px; font-size: 26px; line-height: 1.35; }
.raw-content {
  word-break: break-word;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 24px; font-size: 15.5px; line-height: 1.75;
  box-shadow: var(--shadow-1);
}
.edit-input {
  width: 100%; display: block;
  background: var(--panel);
  border: 1px solid var(--accent); border-radius: var(--radius);
  padding: 22px 24px; font-size: 15px; line-height: 1.75;
  font-family: var(--font-mono);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-1);
}
.ai-block {
  position: relative;
  border: 1px solid var(--border); border-left: 3px solid var(--warn);
  border-radius: var(--radius-s);
  padding: 13px 16px; margin-bottom: 10px;
  background: var(--panel); font-size: 14px;
  color: var(--text-2);
}
.ai-block strong { color: var(--text); }
.annotation {
  border-left: 3px solid var(--accent);
  background: var(--panel); border-radius: 0 10px 10px 0;
  padding: 11px 14px; margin-bottom: 8px;
  box-shadow: var(--shadow-1);
}
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 14px; flex-wrap: wrap; }
.tabs button {
  border: none; border-bottom: 2px solid transparent; border-radius: 0;
  background: none; box-shadow: none; padding: 8px 13px; color: var(--muted); font-weight: 550;
}
.tabs button:hover { color: var(--text); }
.tabs button.active { border-bottom-color: var(--accent); color: var(--accent-ink); font-weight: 650; }

/* ==========================================================================
   Ask — chat interface
   ========================================================================== */
.ask-wrap { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; min-height: 100%; }
.ask-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 6px; }
.ask-head .dd-btn {
  border-color: transparent; background: transparent; color: var(--text-2); box-shadow: none;
}
.ask-head .dd-btn:hover { border-color: var(--border-strong); background: var(--panel); color: var(--text); }

.chat { display: flex; flex-direction: column; gap: 26px; padding: 22px 0 30px; flex: 1; }

/* user bubble */
.msg.user { display: flex; justify-content: flex-end; }
.msg.user .content {
  max-width: 78%;
  background: linear-gradient(160deg, var(--accent-2), var(--accent));
  color: var(--on-accent);
  padding: 11px 17px;
  border-radius: var(--radius-l);
  border-bottom-right-radius: 6px;
  white-space: pre-wrap; word-break: break-word;
  box-shadow: var(--shadow-1);
  font-size: 15px;
}

/* assistant message */
.msg.assistant { display: flex; gap: 13px; }
.msg .avatar {
  width: 30px; height: 30px; border-radius: 10px; flex-shrink: 0; margin-top: 2px;
  background: radial-gradient(circle at 30% 25%, var(--accent-2), var(--accent) 75%);
  color: #fff; font-weight: 800; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: inset 0 1px 1px rgba(255,255,255,.35), var(--shadow-1);
  user-select: none;
}
.msg.assistant .body { flex: 1; min-width: 0; }
.msg.assistant .content { word-break: break-word; font-size: 15.3px; line-height: 1.75; }

/* 마크다운 렌더링 공통 (채팅 답변 + Entry 원문) */
.md-body { word-break: break-word; }
.md-body > :first-child { margin-top: 0; }
.md-body > :last-child { margin-bottom: 0; }
.md-body p { margin: 0 0 12px; }
.md-body ul, .md-body ol { margin: 0 0 12px; padding-left: 22px; }
.md-body li { margin: 3px 0; }
.md-body h4 { margin: 16px 0 6px; font-size: 15.5px; letter-spacing: -0.01em; }
.md-body h4.mh1 { font-size: 19.5px; margin: 20px 0 8px; }
.md-body h4.mh2 { font-size: 17px; margin: 18px 0 7px; }
.md-body pre {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; overflow-x: auto; font-size: 13px; line-height: 1.6;
}
.md-body pre code { background: none; border: none; padding: 0; }
.md-body blockquote {
  margin: 0 0 12px; padding: 2px 14px; border-left: 3px solid var(--border-strong); color: var(--text-2);
}
.table-wrap { overflow-x: auto; margin: 0 0 12px; }
table.md-table {
  border-collapse: collapse; font-size: 13.8px; min-width: 60%;
  border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
}
table.md-table th, table.md-table td {
  text-align: left; padding: 8px 13px; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table.md-table th {
  background: var(--panel-2); font-weight: 650; color: var(--text-2);
  font-size: 12.5px; letter-spacing: .02em; white-space: nowrap;
}
table.md-table tr:last-child td { border-bottom: none; }
table.md-table td + td, table.md-table th + th { border-left: 1px solid var(--border); }

/* citation footnote refs inside text */
sup.cite-ref {
  cursor: pointer; font-size: 10.5px; font-weight: 700;
  color: var(--accent-ink); background: var(--accent-soft);
  border-radius: 5px; padding: 1px 5px; margin: 0 1px;
  vertical-align: super; line-height: 1;
}
sup.cite-ref:hover { background: var(--accent-soft-2); }

/* citation chips under message */
.cite-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
.citation-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px 4px 6px; font-size: 12.5px; font-weight: 550;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 999px; color: var(--text-2); cursor: pointer;
  transition: border-color .12s, background .12s;
  max-width: 300px; overflow: hidden;
}
.citation-chip .n {
  background: var(--accent-soft); color: var(--accent-ink);
  border-radius: 999px; min-width: 18px; height: 18px; font-size: 10.5px; font-weight: 750;
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.citation-chip .t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.citation-chip:hover { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-ink); }

/* tool activity + message actions */
.tool-activity { font-size: 12.5px; color: var(--muted); margin-top: 10px; }
.tool-activity summary { cursor: pointer; user-select: none; list-style: none; display: inline-flex; align-items: center; gap: 6px; }
.tool-activity summary::before { content: '⚙'; opacity: .7; }
.tool-activity summary:hover { color: var(--text-2); }
.tool-activity div { padding: 2px 0 2px 20px; }
.msg-actions { margin-top: 10px; display: flex; gap: 6px; opacity: 0; transition: opacity .15s; }
.msg.assistant:hover .msg-actions { opacity: 1; }
.msg-actions button { font-size: 12px; padding: 3px 11px; box-shadow: none; }

/* typing indicator */
.typing { display: inline-flex; align-items: center; gap: 5px; padding: 6px 2px; }
.typing i {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  opacity: .35; animation: blink 1.2s infinite ease-in-out; font-style: normal;
}
.typing i:nth-child(2) { animation-delay: .18s; }
.typing i:nth-child(3) { animation-delay: .36s; }
@keyframes blink { 0%, 70%, 100% { opacity: .25; transform: translateY(0); } 35% { opacity: 1; transform: translateY(-3px); } }

/* context chips */
.ctx-chips { display: flex; gap: 6px; flex-wrap: wrap; margin: 4px 0 8px; }
.ctx-chips .citation-chip { cursor: default; }
.ctx-chips a { cursor: pointer; color: var(--muted); font-weight: 700; padding: 0 2px; }

/* composer */
.ask-input {
  position: sticky; bottom: 0;
  padding: 10px 0 18px;
  background: linear-gradient(180deg, transparent, var(--bg) 30%);
}
.composer {
  display: flex; align-items: flex-end; gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  padding: 9px 9px 9px 18px;
  box-shadow: var(--shadow-2);
  transition: border-color .15s, box-shadow .15s;
}
.composer:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-2); }
.composer textarea {
  flex: 1; border: none; background: transparent; box-shadow: none;
  padding: 4px 0; max-height: 200px; min-height: 24px;
  font-size: 15px;
}
.composer textarea:focus { box-shadow: none; }
.send-btn {
  width: 38px; height: 38px; border-radius: 13px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  border: none; color: var(--on-accent); padding: 0;
}
.send-btn svg { width: 17px; height: 17px; }
.send-btn:hover { filter: brightness(1.08); color: var(--on-accent); }
.composer-hint { text-align: center; font-size: 11.5px; color: var(--muted); margin-top: 8px; }

/* ask empty state */
.ask-empty { text-align: center; padding: 60px 20px 40px; }
.ask-empty .logo-mark { width: 52px; height: 52px; border-radius: 16px; font-size: 26px; margin: 0 auto 16px; }
.ask-empty h2 { margin: 6px 0 6px; font-size: 20px; color: var(--text); font-weight: 750; letter-spacing: -0.02em; }
.ask-empty p { color: var(--muted); margin: 0 0 22px; }
.suggest-row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.suggest-row button { font-size: 13px; border-radius: 999px; color: var(--text-2); }

/* login --------------------------------------------------------------------- */
.login-wrap {
  margin: auto; width: 360px; max-width: 92vw;
  display: flex; flex-direction: column; gap: 12px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 20px; padding: 34px 30px;
  box-shadow: var(--shadow-2);
}
.login-wrap .logo-mark { width: 46px; height: 46px; border-radius: 14px; font-size: 22px; margin: 0 auto 4px; }
.login-wrap h1 { text-align: center; margin-bottom: 2px; }
.login-wrap label { font-size: 13px; color: var(--text-2); font-weight: 550; display: flex; flex-direction: column; gap: 5px; }
.login-wrap input { width: 100%; }
.login-wrap button { padding: 10px; }

/* misc ----------------------------------------------------------------------- */
table.plain { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.plain th, table.plain td { text-align: left; padding: 7px 9px; border-bottom: 1px solid var(--border); }
table.plain tr:last-child th, table.plain tr:last-child td { border-bottom: none; }
table.plain th { color: var(--muted); font-weight: 550; white-space: nowrap; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; align-items: center; }
.topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(228px, 1fr)); gap: 12px; }
.topic-grid .card { margin: 0; transition: border-color .12s, transform .12s, box-shadow .12s; }
.topic-grid a.card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-2); }
.spin { display: inline-block; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

#toast-container {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  z-index: 200; display: flex; flex-direction: column; gap: 8px; align-items: center;
}
.toast {
  background: var(--text); color: var(--bg);
  padding: 11px 20px; border-radius: 12px;
  font-size: 14px; font-weight: 500;
  box-shadow: var(--shadow-pop);
  animation: toastIn .2s cubic-bezier(.2, .9, .3, 1.2);
  max-width: 90vw;
}
@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } }
.toast a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }

/* mobile ----------------------------------------------------------------------- */
.mobile-tabs { display: none; }
.capture-fab { display: none; }
.mobile-only { display: none; }
@media (max-width: 880px) {
  .mobile-only { display: inline-flex; align-items: center; }
  .nav { display: none; }
  .ctx-panel { display: none; }
  .main { padding: 18px 16px 90px; }
  .topbar { padding: 10px 14px; }
  /* 모바일 상단바 오버플로 방지: Capture는 FAB, Ask는 하단 탭으로 대체 */
  #open-capture, #open-ask { display: none; }
  .topbar .searchbox { min-width: 0; max-width: none; }
  .topbar .searchbox kbd { display: none; }
  h1 { font-size: 21px; }
  .mobile-tabs {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 50;
    background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .mobile-tabs a {
    flex: 1; text-align: center; padding: 11px 0 13px;
    color: var(--muted); font-size: 12px; font-weight: 550;
  }
  .mobile-tabs a.active { color: var(--accent-ink); }
  .capture-fab {
    display: flex; position: fixed; right: 16px; bottom: 74px; z-index: 51;
    width: 54px; height: 54px; border-radius: 18px;
    background: linear-gradient(160deg, var(--accent-2), var(--accent));
    color: #fff; align-items: center; justify-content: center;
    font-size: 27px; border: none;
    box-shadow: var(--shadow-pop);
  }
  .grid-2 { grid-template-columns: 1fr; }
  .msg.user .content { max-width: 88%; }
  .ask-input { padding-bottom: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .main { scroll-behavior: auto; }
}