@import url("/static/fonts/fonts.css");

/* =====================================================================
   DBI Breath Literature — design tokens
   Brand purple #831f82 (dbi.ch), accent blue #2ea3f2 (dbi.ch links),
   deep violet night #10062a (dbi.ch dark sections), logo dot colours for tags.
   ===================================================================== */
:root {
  --font-ui: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Poppins", "Inter", system-ui, sans-serif;

  --bg: #f5f3f9;
  --bg-glow: radial-gradient(1200px 500px at 85% -10%, rgba(131, 31, 130, .07), transparent 60%),
             radial-gradient(900px 400px at -10% 110%, rgba(46, 163, 242, .06), transparent 60%);
  --surface: #ffffff;
  --surface-2: #faf8fc;
  --surface-3: #f1edf6;
  --glass: rgba(255, 255, 255, .78);
  --border: #e8e4ef;
  --border-strong: #d4cfe0;
  --text: #1a1a2e;
  --text-2: #4b4661;
  --muted: #857e9b;
  --brand: #831f82;
  --brand-bg: #831f82;
  --brand-bg-hover: #6c1a6b;
  --brand-soft: #f6e8f5;
  --brand-softer: #fbf5fb;
  --brand-grad: linear-gradient(135deg, #831f82 0%, #a93aa7 55%, #2ea3f2 140%);
  --accent: #1b8fdc;
  --accent-soft: #e4f3fd;
  --ok: #17916a;
  --ok-soft: #e2f5ee;
  --warn: #c07a00;
  --warn-soft: #fdf2dc;
  --danger: #cc2f4d;
  --danger-soft: #fde8ec;
  --mark: rgba(131, 31, 130, .13);
  --shadow-sm: 0 1px 2px rgba(35, 12, 52, .06), 0 1px 1px rgba(35, 12, 52, .03);
  --shadow-md: 0 4px 16px -4px rgba(35, 12, 52, .10), 0 2px 4px rgba(35, 12, 52, .04);
  --shadow-lg: 0 24px 48px -12px rgba(35, 12, 52, .22), 0 4px 12px rgba(35, 12, 52, .06);
  --ring: 0 0 0 3px rgba(131, 31, 130, .20);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --header-h: 60px;

  /* logo dot palette, used for technique tags */
  --dot-1: #d6117f; --dot-1-soft: #fce4f0;
  --dot-2: #0f93b8; --dot-2-soft: #dff3f8;
  --dot-3: #e07d00; --dot-3-soft: #fdefdc;
  --dot-4: #3059a8; --dot-4-soft: #e3eaf8;
  --dot-5: #3f9a36; --dot-5-soft: #e5f4e2;
  --dot-6: #7a3fc2; --dot-6-soft: #efe6fa;
  color-scheme: light;
}

:root[data-theme="dark"] {
  /* Neutral graphite: near-black surfaces with only a faint cool tint; the
     DBI purple is kept as an accent (buttons, links, citations), not as the backdrop. */
  --bg: #0b0b0f;
  --bg-glow: radial-gradient(1100px 480px at 85% -10%, rgba(255, 255, 255, .025), transparent 60%);
  --surface: #131318;
  --surface-2: #17171d;
  --surface-3: #1e1e25;
  --glass: rgba(13, 13, 17, .85);
  --border: #26262e;
  --border-strong: #34343e;
  --text: #ececf0;
  --text-2: #b8b8c3;
  --muted: #80808f;
  --brand: #c894c6;
  --brand-bg: #7a2a79;
  --brand-bg-hover: #8c3a8b;
  --brand-soft: rgba(200, 148, 198, .12);
  --brand-softer: rgba(200, 148, 198, .05);
  --brand-grad: linear-gradient(135deg, #7a2a79 0%, #9c4f9a 60%, #3f8fc9 140%);
  --accent: #6cb6ec;
  --accent-soft: rgba(108, 182, 236, .12);
  --ok: #4cc392;
  --ok-soft: rgba(76, 195, 146, .12);
  --warn: #e3ac55;
  --warn-soft: rgba(227, 172, 85, .12);
  --danger: #f07189;
  --danger-soft: rgba(240, 113, 137, .12);
  --mark: rgba(200, 148, 198, .22);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-md: 0 6px 20px -6px rgba(0, 0, 0, .6);
  --shadow-lg: 0 28px 60px -12px rgba(0, 0, 0, .75);
  --ring: 0 0 0 3px rgba(200, 148, 198, .25);
  --dot-1: #ec7fb4; --dot-1-soft: rgba(236, 127, 180, .12);
  --dot-2: #62c6e0; --dot-2-soft: rgba(98, 198, 224, .11);
  --dot-3: #eaa857; --dot-3-soft: rgba(234, 168, 87, .11);
  --dot-4: #93aef0; --dot-4-soft: rgba(147, 174, 240, .12);
  --dot-5: #86cf7c; --dot-5-soft: rgba(134, 207, 124, .11);
  --dot-6: #b9a0ea; --dot-6-soft: rgba(185, 160, 234, .12);
  color-scheme: dark;
}
/* dark mode: quieter question bubble and selection bar */
:root[data-theme="dark"] .msg-q { background: var(--surface-3); color: var(--text); border: 1px solid var(--border-strong); box-shadow: none; }
:root[data-theme="dark"] .msg-q .scope { color: var(--muted); opacity: 1; }
:root[data-theme="dark"] .btn.primary, :root[data-theme="dark"] .send { box-shadow: none; }
:root[data-theme="dark"] .login-hero { background: linear-gradient(150deg, #0b0b0f 0%, #141019 45%, #2a1330 85%, #3c1a42 100%); }
:root[data-theme="dark"] .login-hero::after { background: radial-gradient(700px 380px at 110% 110%, rgba(63, 143, 201, .16), transparent 60%),
  radial-gradient(500px 300px at -10% -10%, rgba(122, 42, 121, .18), transparent 60%); }
:root[data-theme="dark"] .bubbles i { opacity: .35; }

/* ------------------------------------------------------------------ base */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 14.5px/1.55 var(--font-ui);
  color: var(--text);
  background: var(--bg-glow), var(--bg);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { font-family: var(--font-display); letter-spacing: -.01em; margin: 0; color: var(--text); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; color: inherit; }
mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 1px; }
::selection { background: rgba(131, 31, 130, .22); }
:focus-visible { outline: none; box-shadow: var(--ring); }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
svg.i { width: 18px; height: 18px; flex: none; stroke: currentColor; fill: none; stroke-width: 1.9;
        stroke-linecap: round; stroke-linejoin: round; }
svg.i.sm { width: 15px; height: 15px; }
svg.i.lg { width: 22px; height: 22px; }

* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 10px; border: 3px solid transparent; background-clip: content-box; }

/* ------------------------------------------------------------------ controls */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 38px; padding: 0 16px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-weight: 550; cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, box-shadow .15s, transform .05s;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-3); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--brand-bg); border-color: transparent; color: #fff; box-shadow: 0 6px 16px -6px rgba(131, 31, 130, .55); }
.btn.primary:hover { background: var(--brand-bg-hover); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--text-2); }
.btn.ghost:hover { background: var(--surface-3); color: var(--text); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { background: var(--danger-soft); border-color: transparent; }
.btn.sm { height: 30px; padding: 0 11px; font-size: 13px; border-radius: 8px; }
.btn.block { width: 100%; }
.icon-btn {
  display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  border: 1px solid transparent; background: transparent; color: var(--text-2); cursor: pointer;
  transition: background .15s, color .15s; position: relative;
}
.icon-btn:hover { background: var(--surface-3); color: var(--text); }
.icon-btn.sm { width: 30px; height: 30px; border-radius: 8px; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12.5px; font-weight: 600; color: var(--text-2); }
.input {
  height: 42px; padding: 0 14px; border-radius: 10px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--text); width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
.input::placeholder { color: var(--muted); }
.input:focus { outline: none; border-color: var(--brand); box-shadow: var(--ring); }
select.input { appearance: none; padding-right: 32px; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23857e9b' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 11px center; }

.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; font-size: 13px; color: var(--text-2); }
.switch input { appearance: none; width: 32px; height: 18px; border-radius: 20px; background: var(--border-strong);
  position: relative; cursor: pointer; transition: background .2s; margin: 0; flex: none; }
.switch input::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 2px rgba(0,0,0,.25); transition: transform .2s; }
.switch input:checked { background: var(--brand-bg); }
.switch input:checked::after { transform: translateX(14px); }

.check { appearance: none; width: 18px; height: 18px; border-radius: 6px; border: 1.5px solid var(--border-strong);
  background: var(--surface); cursor: pointer; display: inline-grid; place-items: center; margin: 0; flex: none;
  transition: background .15s, border-color .15s; }
.check:hover { border-color: var(--brand); }
.check:checked { background: var(--brand-bg); border-color: var(--brand-bg); }
.check:checked::after { content: ""; width: 9px; height: 5px; border: 2px solid #fff; border-top: 0; border-right: 0; transform: rotate(-45deg) translate(1px, -1px); }

.chip {
  display: inline-flex; align-items: center; gap: 5px; height: 22px; padding: 0 8px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600; background: var(--surface-3); color: var(--text-2); white-space: nowrap;
}
.chip.brand { background: var(--brand-soft); color: var(--brand); }
.chip.ok { background: var(--ok-soft); color: var(--ok); }
.chip.accent { background: var(--accent-soft); color: var(--accent); }
.chip.warn { background: var(--warn-soft); color: var(--warn); }
.chip.t1 { background: var(--dot-1-soft); color: var(--dot-1); }
.chip.t2 { background: var(--dot-2-soft); color: var(--dot-2); }
.chip.t3 { background: var(--dot-3-soft); color: var(--dot-3); }
.chip.t4 { background: var(--dot-4-soft); color: var(--dot-4); }
.chip.t5 { background: var(--dot-5-soft); color: var(--dot-5); }
.chip.t6 { background: var(--dot-6-soft); color: var(--dot-6); }
.chip .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.kbd { font: 600 11px/1 var(--font-ui); padding: 3px 6px; border-radius: 6px; border: 1px solid var(--border-strong);
  color: var(--muted); background: var(--surface-2); }

.seg { display: inline-flex; padding: 3px; gap: 2px; border-radius: 10px; background: var(--surface-3); border: 1px solid var(--border); }
.seg button { border: 0; background: transparent; height: 28px; padding: 0 11px; border-radius: 8px; font-size: 12.5px;
  font-weight: 600; color: var(--text-2); cursor: pointer; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.seg button:hover { color: var(--text); }
.seg button.on { background: var(--surface); color: var(--brand); box-shadow: var(--shadow-sm); }
.seg button:disabled { opacity: .4; cursor: not-allowed; }
.seg .count { font-size: 11px; padding: 1px 6px; border-radius: 10px; background: var(--brand-soft); color: var(--brand); }

/* ------------------------------------------------------------------ brand */
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.brand .word { font: 700 20px/1 var(--font-display); color: var(--brand); letter-spacing: .02em; }
.brand .sep { width: 1px; height: 22px; background: var(--border-strong); }
.brand .prod { display: flex; flex-direction: column; line-height: 1.15; }
.brand .prod b { font: 600 14.5px var(--font-display); }
.brand .prod span { font-size: 11.5px; color: var(--muted); }

/* ------------------------------------------------------------------ login */
.login { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(420px, .85fr); min-height: 100vh; }
.login-hero {
  position: relative; overflow: hidden; color: #fff; padding: 48px 56px; display: flex; flex-direction: column;
  background: linear-gradient(150deg, #0e0427 0%, #2a0c47 38%, #5b1a68 72%, #831f82 100%);
}
.login-hero::after { content: ""; position: absolute; inset: 0;
  background: radial-gradient(700px 380px at 110% 110%, rgba(46, 163, 242, .35), transparent 60%),
              radial-gradient(500px 300px at -10% -10%, rgba(214, 17, 127, .25), transparent 60%); pointer-events: none; }
.login-hero .brand .word { color: #fff; }
.login-hero .brand .sep { background: rgba(255,255,255,.3); }
.login-hero .brand .prod b { color: #fff; }
.login-hero .brand .prod span { color: rgba(255,255,255,.7); }
.login-hero h1 { color: #fff; font-size: clamp(30px, 3.2vw, 46px); line-height: 1.12; font-weight: 600; max-width: 620px; margin-top: auto; }
.login-hero h1 em { font-style: normal; background: linear-gradient(90deg, #ff8fd0, #7fd3ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.login-hero p.lead { color: rgba(255,255,255,.78); font-size: 16px; max-width: 540px; margin: 18px 0 0; }
.login-stats { display: flex; gap: 36px; margin: 36px 0 auto; position: relative; z-index: 1; }
.login-stats div b { display: block; font: 600 28px var(--font-display); color: #fff; }
.login-stats div span { font-size: 12.5px; color: rgba(255,255,255,.65); text-transform: uppercase; letter-spacing: .08em; }
.login-hero .techs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; position: relative; z-index: 1; }
.login-hero .techs span { padding: 5px 12px; border-radius: 999px; font-size: 12.5px; background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.9); backdrop-filter: blur(4px); }
.login-hero footer { position: relative; z-index: 1; margin-top: 40px; font-size: 12.5px; color: rgba(255,255,255,.55); }
.bubbles { position: absolute; inset: 0; pointer-events: none; }
.bubbles i { position: absolute; border-radius: 50%; opacity: .55; animation: drift linear infinite; filter: saturate(1.1); }
@keyframes drift { from { transform: translateY(0) scale(1); opacity: 0; } 12% { opacity: .6; } 88% { opacity: .5; }
                   to { transform: translateY(-115vh) scale(.6); opacity: 0; } }
.login-side { display: grid; place-items: center; padding: 40px 28px; position: relative; }
.login-card { width: 100%; max-width: 400px; }
.login-card h2 { font-size: 26px; font-weight: 600; }
.login-card .sub { color: var(--muted); margin: 6px 0 28px; }
.login-card form { display: flex; flex-direction: column; gap: 16px; }
.pw-wrap { position: relative; }
.pw-wrap .icon-btn { position: absolute; right: 4px; top: 3px; }
.form-error { display: none; padding: 10px 12px; border-radius: 10px; background: var(--danger-soft); color: var(--danger); font-size: 13px; font-weight: 500; }
.form-error.show { display: block; }
.login-card .note { margin-top: 26px; font-size: 12.5px; color: var(--muted); text-align: center; }
.corner { position: absolute; top: 18px; right: 18px; }

/* ------------------------------------------------------------------ app shell */
.app { display: flex; flex-direction: column; height: 100vh; height: 100dvh; overflow: hidden; }
.topbar {
  height: var(--header-h); flex: none; display: flex; align-items: center; gap: 16px; padding: 0 18px;
  background: var(--glass); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--border); position: relative; z-index: 20;
}
.topbar .grow { flex: 1; }
.stat-pill { display: inline-flex; align-items: center; gap: 10px; height: 32px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface-2); font-size: 12.5px; color: var(--text-2); }
.stat-pill b { color: var(--text); font-weight: 650; }
.stat-pill .sep { width: 1px; height: 14px; background: var(--border-strong); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); box-shadow: 0 0 0 3px transparent; }
.status-dot.ready { background: var(--ok); box-shadow: 0 0 0 3px var(--ok-soft); }
.status-dot.loading { background: var(--warn); box-shadow: 0 0 0 3px var(--warn-soft); animation: pulse 1.4s infinite; }
.status-dot.down { background: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }
@keyframes pulse { 50% { opacity: .45; } }
.avatar { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; font: 600 13px var(--font-display);
  color: #fff; background: var(--brand-grad); cursor: pointer; border: 2px solid var(--surface); box-shadow: var(--shadow-sm); }

.menu { position: absolute; right: 0; top: calc(100% + 8px); min-width: 240px; padding: 6px; border-radius: 14px;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-lg); display: none; z-index: 50; }
.menu.open { display: block; animation: pop .14s ease-out; }
@keyframes pop { from { opacity: 0; transform: translateY(-4px) scale(.98); } }
.menu .who { padding: 10px 12px 12px; border-bottom: 1px solid var(--border); margin-bottom: 6px; }
.menu .who b { display: block; font-weight: 600; }
.menu .who span { font-size: 12.5px; color: var(--muted); }
.menu button { display: flex; align-items: center; gap: 10px; width: 100%; padding: 9px 12px; border: 0; background: transparent;
  border-radius: 9px; cursor: pointer; color: var(--text-2); font-size: 13.5px; text-align: left; }
.menu button:hover { background: var(--surface-3); color: var(--text); }
.menu .theme-row { display: flex; align-items: center; justify-content: space-between; padding: 6px 12px; font-size: 13.5px; color: var(--text-2); }
.rel { position: relative; }

.workspace { flex: 1; min-height: 0; display: grid; grid-template-columns: var(--left-w, 420px) 6px minmax(0, 1fr); }
.splitter { cursor: col-resize; position: relative; }
.splitter::after { content: ""; position: absolute; inset: 0 2px; border-radius: 4px; transition: background .15s; }
.splitter:hover::after, .splitter.drag::after { background: var(--brand-soft); }

/* ------------------------------------------------------------------ left: search */
.pane-search { min-width: 0; display: flex; flex-direction: column; min-height: 0; border-right: 1px solid var(--border); background: var(--surface-2); }
.search-head { padding: 16px 16px 10px; display: flex; flex-direction: column; gap: 10px; border-bottom: 1px solid var(--border); background: var(--surface); }
.pane-title { display: flex; align-items: center; justify-content: space-between; }
.pane-title h3 { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.searchbox { position: relative; }
.searchbox svg.i { position: absolute; left: 13px; top: 12px; color: var(--muted); }
.searchbox .input { padding-left: 40px; padding-right: 74px; height: 44px; font-size: 15px; border-radius: 12px; background: var(--surface-2); }
.searchbox .input:focus { background: var(--surface); }
.searchbox .right { position: absolute; right: 8px; top: 8px; display: flex; align-items: center; gap: 4px; }
.searchbox .right .icon-btn { width: 28px; height: 28px; }
.search-tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-tools select.input { height: 32px; width: auto; font-size: 12.5px; padding: 0 30px 0 10px; border-radius: 8px; }
.search-tools .btn.sm { gap: 6px; }
.badge-count { min-width: 18px; height: 18px; border-radius: 9px; padding: 0 5px; background: var(--brand-bg); color: #fff; font-size: 11px; display: inline-grid; place-items: center; }

.filters { display: none; padding: 12px 16px 14px; border-bottom: 1px solid var(--border); background: var(--surface); max-height: 46vh; overflow-y: auto; }
.filters.open { display: block; animation: pop .15s ease-out; }
.fgroup + .fgroup { margin-top: 14px; }
.fgroup h4 { font: 600 11.5px var(--font-ui); text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin-bottom: 8px; display: flex; justify-content: space-between; }
.fchips { display: flex; flex-wrap: wrap; gap: 6px; }
.fchip { border: 1px solid var(--border); background: var(--surface-2); color: var(--text-2); border-radius: 999px; height: 28px; padding: 0 10px;
  font-size: 12.5px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; transition: all .12s; }
.fchip:hover { border-color: var(--brand); color: var(--text); }
.fchip.on { background: var(--brand-soft); border-color: transparent; color: var(--brand); font-weight: 600; }
.fchip small { color: var(--muted); font-size: 11px; }
.fchip.on small { color: inherit; opacity: .75; }
.year-row { display: flex; align-items: center; gap: 8px; }
.year-row .input { height: 32px; width: 86px; font-size: 13px; padding: 0 10px; }
.hist { display: flex; align-items: flex-end; gap: 1px; height: 34px; margin-bottom: 8px; }
.hist span { flex: 1; background: var(--brand-soft); border-radius: 2px 2px 0 0; min-height: 2px; transition: background .12s; }
.hist span.in { background: var(--brand); opacity: .55; }

.result-meta { display: flex; align-items: center; justify-content: space-between; padding: 9px 16px; font-size: 12.5px; color: var(--muted); }
.result-meta b { color: var(--text-2); }
.relaxed { margin: 0 16px 8px; padding: 8px 10px; border-radius: 9px; background: var(--warn-soft); color: var(--warn); font-size: 12.5px; }
.results { flex: 1; overflow-y: auto; padding: 0 10px 90px; }
.rcard { display: flex; gap: 11px; padding: 12px 12px; margin-bottom: 6px; border-radius: 12px; border: 1px solid transparent; cursor: pointer;
  background: var(--surface); box-shadow: var(--shadow-sm); transition: border-color .12s, box-shadow .12s, transform .12s; }
.rcard:hover { border-color: var(--border-strong); box-shadow: var(--shadow-md); }
.rcard.active { border-color: var(--brand); box-shadow: var(--ring); }
.rcard.sel { background: var(--brand-softer); border-color: var(--brand-soft); }
.rcard .check { margin-top: 2px; }
.rcard .body { min-width: 0; flex: 1; }
.rcard .t { font-weight: 600; font-size: 14px; line-height: 1.38; color: var(--text); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.rcard .m { font-size: 12.5px; color: var(--muted); margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rcard .m b { color: var(--text-2); font-weight: 600; }
.rcard .s { font-size: 12.8px; color: var(--text-2); margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.rcard .tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.load-more { display: block; margin: 8px auto 0; }
.empty-hint { text-align: center; color: var(--muted); padding: 40px 20px; font-size: 13.5px; }
.skeleton { height: 92px; border-radius: 12px; margin-bottom: 6px; background: linear-gradient(90deg, var(--surface) 0%, var(--surface-3) 50%, var(--surface) 100%);
  background-size: 200% 100%; animation: shimmer 1.2s infinite; }
@keyframes shimmer { to { background-position: -200% 0; } }

.selbar { position: absolute; left: 12px; right: 12px; bottom: 12px; display: none; align-items: center; gap: 10px; padding: 10px 10px 10px 16px;
  border-radius: 14px; background: #1f0d35; color: #fff; box-shadow: var(--shadow-lg); z-index: 5; }
:root[data-theme="dark"] .selbar { background: var(--surface-3); border: 1px solid var(--border-strong); }
.selbar.show { display: flex; animation: pop .15s ease-out; }
.selbar b { font-weight: 650; }
.selbar .grow { flex: 1; }
.selbar .btn.sm { height: 30px; }
.selbar .btn.ghost { color: rgba(255,255,255,.75); }
.selbar .btn.ghost:hover { background: rgba(255,255,255,.1); color: #fff; }

/* ------------------------------------------------------------------ right: chat */
.pane-chat { min-width: 0; display: flex; flex-direction: column; min-height: 0; position: relative; }
.thread { flex: 1; overflow-y: auto; padding: 28px clamp(16px, 4vw, 56px) 24px; scroll-behavior: smooth; }
.thread-inner { max-width: 920px; margin: 0 auto; display: flex; flex-direction: column; gap: 22px; }

.hero { text-align: center; padding: clamp(20px, 7vh, 80px) 0 10px; }
.hero .mark { width: 62px; height: 62px; margin: 0 auto 18px; border-radius: 18px; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-md); }
.hero .mark img { width: 40px; height: 40px; }
.hero h2 { font-size: clamp(24px, 2.6vw, 32px); font-weight: 600; }
.hero h2 span { background: var(--brand-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--text-2); max-width: 600px; margin: 10px auto 0; font-size: 15px; }
.suggest { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 10px; margin-top: 30px; text-align: left; }
.suggest button { border: 1px solid var(--border); background: var(--surface); border-radius: 14px; padding: 14px 16px; cursor: pointer;
  text-align: left; color: var(--text-2); font-size: 13.5px; line-height: 1.45; display: flex; gap: 10px; transition: all .15s; box-shadow: var(--shadow-sm); }
.suggest button:hover { border-color: var(--brand); color: var(--text); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.suggest button svg { color: var(--brand); margin-top: 1px; }

.msg-q { align-self: flex-end; max-width: 78%; padding: 12px 16px; border-radius: 18px 18px 4px 18px; background: var(--brand-bg); color: #fff;
  font-size: 14.5px; box-shadow: 0 8px 20px -10px rgba(131, 31, 130, .6); white-space: pre-wrap; word-wrap: break-word; }
.msg-q .scope { display: block; font-size: 11.5px; opacity: .75; margin-top: 4px; }

.msg-a { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); overflow: hidden; }
.msg-a .a-head { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--surface-2); }
.msg-a .a-head img { width: 22px; height: 22px; }
.msg-a .a-head b { font: 600 13.5px var(--font-display); }
.msg-a .a-head .grow { flex: 1; }
.msg-a .a-head .meta { font-size: 12px; color: var(--muted); display: flex; gap: 10px; align-items: center; }
.a-status { display: flex; align-items: center; gap: 10px; padding: 16px 20px; color: var(--text-2); font-size: 13.5px; }
.typing { display: inline-flex; gap: 4px; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--brand); animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .15s; } .typing i:nth-child(3) { animation-delay: .3s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-3px); } }

.md { padding: 18px 22px 8px; font-size: 14.8px; line-height: 1.68; color: var(--text); overflow-wrap: anywhere; }
.md p { margin: 0 0 12px; }
.md h1, .md h2, .md h3, .md h4 { font-size: 15.5px; margin: 18px 0 8px; font-weight: 600; }
.md h1 { font-size: 17px; }
.md ul, .md ol { margin: 0 0 12px; padding-left: 22px; }
.md li { margin: 4px 0; }
.md li::marker { color: var(--brand); }
.md strong { font-weight: 650; color: var(--text); }
.md code { font: 12.5px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--surface-3); padding: 1px 5px; border-radius: 5px; }
.md hr { border: 0; border-top: 1px solid var(--border); margin: 16px 0; }
.md .caret { display: inline-block; width: 7px; height: 16px; background: var(--brand); vertical-align: -2px; border-radius: 1px; animation: pulse 1s infinite; margin-left: 2px; }
.cite { display: inline-grid; place-items: center; min-width: 20px; height: 19px; padding: 0 5px; margin: 0 1px; border-radius: 6px;
  background: var(--brand-soft); color: var(--brand); font: 700 11px/1 var(--font-ui); vertical-align: 1px; cursor: pointer; transition: all .12s; }
.cite:hover { background: var(--brand-bg); color: #fff; }
.cite.bad { background: var(--danger-soft); color: var(--danger); }
.a-error { margin: 14px 20px; padding: 12px 14px; border-radius: 10px; background: var(--danger-soft); color: var(--danger); font-size: 13.5px; }

.sources { padding: 6px 16px 16px; }
.sources-head { display: flex; align-items: center; justify-content: space-between; padding: 6px 6px 10px; }
.sources-head h4 { font: 600 12px var(--font-ui); letter-spacing: .07em; text-transform: uppercase; color: var(--muted); }
.src-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px; }
.src { border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; background: var(--surface-2); transition: all .15s; position: relative; }
.src:hover { border-color: var(--border-strong); }
.src.flash { border-color: var(--brand); box-shadow: var(--ring); background: var(--brand-softer); }
.src .n { position: absolute; top: 10px; left: 12px; min-width: 22px; height: 22px; border-radius: 7px; background: var(--brand-bg); color: #fff;
  font: 700 11.5px/22px var(--font-ui); text-align: center; padding: 0 5px; }
.src .st { padding-left: 32px; font-weight: 600; font-size: 13px; line-height: 1.38; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; cursor: pointer; }
.src .st:hover { color: var(--brand); }
.src .smeta { padding-left: 32px; font-size: 12px; color: var(--muted); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.src .sa { display: flex; align-items: center; gap: 4px; margin-top: 9px; }
.src .sa .grow { flex: 1; }
.src .sa .btn.sm { height: 26px; padding: 0 8px; font-size: 12px; border-radius: 7px; gap: 5px; }
.src .sa .icon-btn.sm { width: 26px; height: 26px; }
.src .ev { display: none; margin-top: 10px; padding: 10px 12px; border-radius: 9px; background: var(--surface); border: 1px dashed var(--border-strong);
  font-size: 12.5px; color: var(--text-2); max-height: 260px; overflow-y: auto; }
.src .ev.open { display: block; }
.src .ev p { margin: 0 0 8px; }
.src .ev p b { color: var(--brand); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: .04em; display: block; }
.src.wide { grid-column: 1 / -1; }

.a-foot { display: flex; align-items: center; gap: 6px; padding: 10px 16px; border-top: 1px solid var(--border); background: var(--surface-2); flex-wrap: wrap; }
.a-foot .grow { flex: 1; }
.a-foot .note { font-size: 12px; color: var(--muted); display: flex; gap: 12px; }

.composer-wrap { padding: 0 clamp(16px, 4vw, 56px) 18px; }
.composer { max-width: 920px; margin: 0 auto; border: 1px solid var(--border-strong); border-radius: 18px; background: var(--surface);
  box-shadow: var(--shadow-lg); transition: border-color .15s, box-shadow .15s; }
.composer:focus-within { border-color: var(--brand); box-shadow: var(--shadow-lg), var(--ring); }
.composer textarea { width: 100%; border: 0; resize: none; background: transparent; padding: 14px 18px 6px; min-height: 52px; max-height: 220px;
  font-size: 15px; line-height: 1.5; outline: none; display: block; }
.composer textarea::placeholder { color: var(--muted); }
.composer .bar { display: flex; align-items: center; gap: 10px; padding: 6px 8px 8px 12px; flex-wrap: wrap; }
.composer .bar .grow { flex: 1; }
.send { width: 40px; height: 40px; border-radius: 12px; border: 0; background: var(--brand-bg); color: #fff; display: grid; place-items: center; cursor: pointer;
  transition: background .15s, transform .08s; box-shadow: 0 6px 14px -6px rgba(131, 31, 130, .6); }
.send:hover { background: var(--brand-bg-hover); }
.send:disabled { background: var(--border-strong); box-shadow: none; cursor: not-allowed; }
.send.stop { background: var(--text); }
.composer-hint { max-width: 920px; margin: 8px auto 0; font-size: 11.5px; color: var(--muted); text-align: center; }
.followup-tag { display: none; align-items: center; gap: 6px; margin: 10px 14px 0; padding: 4px 6px 4px 10px; border-radius: 8px; background: var(--accent-soft);
  color: var(--accent); font-size: 12px; width: fit-content; max-width: calc(100% - 28px); }
.followup-tag.show { display: inline-flex; }
.followup-tag span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.followup-tag button { border: 0; background: transparent; color: inherit; cursor: pointer; display: grid; place-items: center; padding: 2px; border-radius: 5px; }

/* ------------------------------------------------------------------ drawers & modals */
.scrim { position: fixed; inset: 0; background: rgba(14, 4, 39, .38); backdrop-filter: blur(2px); z-index: 60; display: none; }
.scrim.open { display: block; animation: fade .15s; }
@keyframes fade { from { opacity: 0; } }
.drawer { position: fixed; top: 0; bottom: 0; right: 0; width: min(640px, 100vw); background: var(--surface); z-index: 70; box-shadow: var(--shadow-lg);
  transform: translateX(105%); transition: transform .25s cubic-bezier(.2, .8, .2, 1); display: flex; flex-direction: column; border-left: 1px solid var(--border); }
.drawer.open { transform: none; }
.drawer.left { right: auto; left: 0; transform: translateX(-105%); border-left: 0; border-right: 1px solid var(--border); width: min(420px, 100vw); }
.drawer.left.open { transform: none; }
.drawer-head { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border); }
.drawer-head h3 { font-size: 15px; font-weight: 600; flex: 1; }
.drawer-body { flex: 1; overflow-y: auto; padding: 22px 26px 30px; }
.paper h2 { font-size: 20px; line-height: 1.35; font-weight: 600; }
.paper .authors { color: var(--text-2); margin-top: 10px; font-size: 13.5px; }
.paper .venue { color: var(--muted); margin-top: 4px; font-size: 13px; }
.paper .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.paper .actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 6px; }
.paper h4 { font: 600 12px var(--font-ui); text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin: 24px 0 8px; }
.paper .abstract { font-size: 14.3px; line-height: 1.7; color: var(--text); }
.paper .kw { display: flex; flex-wrap: wrap; gap: 6px; }
.sim { display: flex; flex-direction: column; gap: 6px; }
.sim button { text-align: left; border: 1px solid var(--border); background: var(--surface-2); border-radius: 10px; padding: 9px 12px; cursor: pointer; }
.sim button:hover { border-color: var(--brand); }
.sim button b { display: block; font-size: 13px; font-weight: 600; line-height: 1.35; }
.sim button span { font-size: 12px; color: var(--muted); }

.hist-item { display: flex; align-items: flex-start; gap: 8px; padding: 10px 12px; border-radius: 10px; cursor: pointer; }
.hist-item:hover { background: var(--surface-3); }
.hist-item .q { flex: 1; font-size: 13.5px; line-height: 1.4; }
.hist-item .q span { display: block; font-size: 11.5px; color: var(--muted); margin-top: 2px; }
.hist-item .icon-btn { opacity: 0; }
.hist-item:hover .icon-btn { opacity: 1; }

.modal { position: fixed; inset: 0; display: none; place-items: center; z-index: 80; padding: 20px; }
.modal.open { display: grid; }
.modal .card { width: min(560px, 100%); max-height: 90vh; overflow: auto; background: var(--surface); border-radius: 18px; box-shadow: var(--shadow-lg);
  border: 1px solid var(--border); animation: pop .16s ease-out; }
.modal .card.wide { width: min(880px, 100%); }
.modal .card-head { display: flex; align-items: center; padding: 18px 22px; border-bottom: 1px solid var(--border); }
.modal .card-head h3 { flex: 1; font-size: 17px; font-weight: 600; }
.modal .card-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 14px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th { text-align: left; font: 600 11.5px var(--font-ui); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 8px 10px; border-bottom: 1px solid var(--border); }
.table td { padding: 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table td .sub { display: block; font-size: 12px; color: var(--muted); }
.table .acts { text-align: right; white-space: nowrap; }
.section-title { font: 600 13px var(--font-display); margin-top: 6px; }

.toast-wrap { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%); z-index: 100; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { padding: 10px 16px; border-radius: 12px; background: #1f0d35; color: #fff; box-shadow: var(--shadow-lg); font-size: 13.5px; display: flex; gap: 8px; align-items: center; animation: pop .16s; }
.toast.err { background: var(--danger); }

/* ------------------------------------------------------------------ mobile */
.mobile-tabs { display: none; }
@media (max-width: 900px) {
  .workspace { grid-template-columns: 1fr; }
  .splitter { display: none; }
  .pane-search, .pane-chat { grid-row: 1; grid-column: 1; }
  .workspace[data-tab="ask"] .pane-search { display: none; }
  .workspace[data-tab="search"] .pane-chat { display: none; }
  .mobile-tabs { display: flex; }
  .stat-pill, .brand .sep, .brand .prod { display: none; }
  .login { grid-template-columns: 1fr; }
  .login-hero { padding: 24px 22px 28px; }
  .login-hero h1 { font-size: 26px; margin-top: 28px; }
  .login-hero p.lead, .login-hero .techs, .login-hero footer, .login-stats { display: none; }
  .login-stats { gap: 22px; }
  .msg-q { max-width: 92%; }
  .grid2 { grid-template-columns: 1fr; }
  .composer-hint { display: none; }
  /* iOS Safari zooms into inputs below 16px */
  .input, .composer textarea, .searchbox .input, select.input { font-size: 16px; }
  .topbar { padding: 0 10px; gap: 8px; }
  .thread { padding: 16px 12px 12px; }
  .composer-wrap { padding: 0 8px calc(8px + env(safe-area-inset-bottom)); }
  .composer .bar { gap: 6px; }
  .seg button { padding: 0 8px; font-size: 12px; }
  .sources-head span { display: none; }
  .md { padding: 14px 16px 6px; }
  .drawer-body { padding: 18px 18px 30px; }
  .search-head { padding: 12px 12px 10px; }
  .results { padding: 0 8px 90px; }
  .toast-wrap { top: calc(68px + env(safe-area-inset-top)); bottom: auto; width: calc(100% - 24px); }
}