/* HIE-Arena — LMArena-quiet: white, space, one sans */
:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --line: #ececec;
  --line-2: #ddd;
  --text: #171717;
  --muted: #6b6b6b;
  --faint: #9a9a9a;
  --brand: #2563eb;
  --brand-soft: #eff4ff;
  --a: #2563eb;
  --b: #0f766e;
  --warn: #b42318;
  --warn-soft: #fef3f2;
  --radius: 12px;
  --font: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
:root[data-theme="dark"] {
  --bg: #0f0f0f;
  --surface: #171717;
  --line: #2a2a2a;
  --line-2: #3a3a3a;
  --text: #f4f4f4;
  --muted: #a3a3a3;
  --faint: #737373;
  --brand: #60a5fa;
  --brand-soft: #172554;
  --a: #60a5fa;
  --b: #2dd4bf;
  --warn: #fca5a5;
  --warn-soft: #3f1d1d;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f0f0f; --surface: #171717; --line: #2a2a2a; --line-2: #3a3a3a;
    --text: #f4f4f4; --muted: #a3a3a3; --faint: #737373;
    --brand: #60a5fa; --brand-soft: #172554; --a: #60a5fa; --b: #2dd4bf;
    --warn: #fca5a5; --warn-soft: #3f1d1d;
  }
}

*, *::before, *::after { box-sizing: border-box }
[hidden] { display: none !important }
html { -webkit-text-size-adjust: 100% }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea { font: inherit; color: inherit }
h1, h2 { margin: 0; font-weight: 500 }
p { margin: 0 }

.topbar {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 28px;
  height: 56px; display: flex; align-items: center; gap: 28px;
}
.brand {
  text-decoration: none; color: var(--text);
  font-size: 16px; font-weight: 600; letter-spacing: -.02em;
}
.nav { display: flex; gap: 2px; margin-left: 8px }
.nav-link {
  background: none; border: 0; padding: 6px 12px; border-radius: 8px;
  color: var(--muted); font-size: 14px; font-weight: 500; cursor: pointer;
}
.nav-link:hover { color: var(--text) }
.nav-link.is-active { color: var(--text); background: var(--surface); border: 1px solid var(--line) }
.icon-btn {
  margin-left: auto; width: 34px; height: 34px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 8px; background: var(--surface);
  color: var(--muted); cursor: pointer;
}
.icon-btn:hover { color: var(--text) }
.icon-btn svg { width: 16px; height: 16px }
.i-moon { display: none }
:root[data-theme="dark"] .i-sun { display: none }
:root[data-theme="dark"] .i-moon { display: block }

main { max-width: 1120px; margin: 0 auto; padding: 0 28px 120px }
.view { display: none }
.view.is-active { display: block }

.hero { padding: 48px 0 8px; max-width: 560px }
.hero h1 { font-size: 28px; letter-spacing: -.03em; line-height: 1.2; font-weight: 500 }
.hero p { margin-top: 8px; color: var(--muted); font-size: 15px }

.battle { padding-top: 28px }
.question-strip {
  color: var(--muted); font-size: 14px; margin: 0 0 20px;
  padding-bottom: 16px; border-bottom: 1px solid var(--line);
}
.panes { display: grid; grid-template-columns: 1fr 1fr; gap: 24px }
.pane {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 280px;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.pane-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
}
.pane-tools { display: flex; align-items: center; gap: 10px }
.tag {
  font-size: 12px; font-weight: 600; letter-spacing: .04em;
  color: var(--muted);
}
.tag-a { color: var(--a) }
.tag-b { color: var(--b) }
.pane-status { font-size: 12px; color: var(--faint) }
.pane-status .secs { display: none }
.battle.is-revealed .pane-status .secs { display: inline }
.pane-status .dot {
  display: inline-block; width: 6px; height: 6px; margin-right: 6px;
  border-radius: 50%; background: var(--brand); animation: pulse 1.4s ease infinite;
}
@keyframes pulse { 50% { opacity: .3 } }
.pane-body { padding: 20px 18px 28px; overflow-y: auto; max-height: min(56vh, 580px); flex: 1 }
.pane-body.is-streaming > :last-child::after {
  content: ""; display: inline-block; width: 1.5px; height: .9em; margin-left: 2px;
  background: var(--text); animation: blink 1s steps(2) infinite; vertical-align: -2px;
}
@keyframes blink { 50% { opacity: 0 } }

.flag { position: relative }
.flag-btn {
  border: 0; background: none; color: var(--faint);
  font-size: 12px; font-weight: 500; cursor: pointer; padding: 4px 6px;
}
.flag-btn:hover { color: var(--text) }
.flag.is-on .flag-btn { color: var(--warn) }
.flag-menu {
  position: absolute; right: 0; top: calc(100% + 4px); z-index: 12;
  min-width: 170px; padding: 4px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 12px 32px rgba(0,0,0,.08);
  display: flex; flex-direction: column;
}
.flag-menu button {
  text-align: left; border: 0; background: none; padding: 8px 10px;
  border-radius: 7px; font-size: 13px; cursor: pointer;
}
.flag-menu button:hover { background: var(--bg) }

.markdown { font-size: 14.5px; line-height: 1.65; color: var(--text) }
.markdown > *:first-child { margin-top: 0 }
.markdown p { margin: 0 0 .8em }
.markdown h1, .markdown h2, .markdown h3 { font-size: 15px; font-weight: 600; margin: 1.2em 0 .4em }
.markdown ul, .markdown ol { margin: 0 0 .8em; padding-left: 1.2em }
.markdown li { margin: .2em 0 }
.markdown code {
  font-family: ui-monospace, Menlo, monospace; font-size: .86em;
  background: var(--bg); border: 1px solid var(--line); border-radius: 4px; padding: 1px 4px;
}
.markdown pre { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 12px; overflow-x: auto }
.markdown pre code { border: 0; background: none; padding: 0 }
.markdown table { width: 100%; border-collapse: collapse; font-size: 13px; display: block; overflow-x: auto }
.markdown th, .markdown td { border: 1px solid var(--line); padding: 6px 8px; text-align: left }
.markdown blockquote { margin: 0 0 .8em; padding-left: 12px; border-left: 2px solid var(--line-2); color: var(--muted) }
.markdown hr { border: 0; border-top: 1px solid var(--line); margin: 1em 0 }
.pane-error { color: var(--warn); background: var(--warn-soft); border-radius: 8px; padding: 10px 12px }

.composer { position: sticky; bottom: 0; z-index: 20; padding: 12px 0 20px; background: linear-gradient(to top, var(--bg) 72%, transparent) }
.votebar { margin-bottom: 12px }
.vote-buttons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px }
.vote {
  padding: 12px 10px; border-radius: 10px; border: 1px solid var(--line-2);
  background: var(--surface); font-size: 13.5px; font-weight: 500; cursor: pointer;
}
.vote:hover:not(:disabled) { border-color: var(--text) }
.vote:disabled { opacity: .4; cursor: default }
.vote-a { color: var(--a); border-color: color-mix(in srgb, var(--a) 35%, var(--line)) }
.vote-b { color: var(--b); border-color: color-mix(in srgb, var(--b) 35%, var(--line)) }
.vote-bad { color: var(--warn) }

.reveal {
  display: flex; flex-wrap: wrap; align-items: center; gap: 16px;
  margin-bottom: 12px; padding: 12px 0; border-top: 1px solid var(--line);
}
.reveal-row { display: flex; align-items: center; gap: 8px }
.reveal-name { font-weight: 500 }
.reveal .btn { margin-left: auto }

.composer-box {
  background: var(--surface); border: 1px solid var(--line-2);
  border-radius: 14px; padding: 12px 14px;
}
.composer-box:focus-within { border-color: var(--brand) }
#prompt {
  width: 100%; border: 0; outline: 0; background: none; resize: none;
  font-size: 15px; line-height: 1.5; min-height: 48px; max-height: 160px;
}
#prompt::placeholder { color: var(--faint) }
.composer-actions { display: flex; align-items: center; margin-top: 8px }
.btn {
  border: 1px solid transparent; background: none; cursor: pointer;
  padding: 7px 14px; border-radius: 8px; font-size: 13.5px; font-weight: 500;
}
.btn-ghost { color: var(--muted) }
.btn-ghost:hover { color: var(--text) }
.btn-primary { margin-left: auto; background: var(--text); color: var(--bg) }
.btn-primary:hover { opacity: .9 }
.btn-primary:disabled { opacity: .4; cursor: default }
.composer-note { margin-top: 8px; font-size: 12px; color: var(--faint); text-align: center }

.page-head { padding: 40px 0 20px }
.page-head h1 { font-size: 24px; letter-spacing: -.02em }
.page-head p { margin-top: 6px; color: var(--muted); font-size: 14px }

.table-wrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface) }
.table { width: 100%; border-collapse: collapse }
.table th {
  text-align: left; font-size: 11px; font-weight: 600; letter-spacing: .06em;
  text-transform: uppercase; color: var(--faint);
  padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--bg);
}
.table td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: middle }
.table tr:last-child td { border-bottom: 0 }
.table .num { text-align: right; font-variant-numeric: tabular-nums }
.table .rank { color: var(--faint); font-weight: 600; width: 56px }
.table .name { font-weight: 500 }
.table .org { color: var(--muted); font-size: 13px }
.table .score { font-weight: 600 }
.win { display: flex; align-items: center; gap: 10px; min-width: 140px }
.winbar { flex: 1; height: 6px; background: var(--bg); border-radius: 99px; overflow: hidden }
.winbar > i { display: block; height: 100%; background: var(--brand); border-radius: inherit }
.win span { font-variant-numeric: tabular-nums; font-size: 13px; color: var(--muted); width: 36px }
.table-note { margin: 14px 0 0; font-size: 12px; color: var(--faint) }

.modal { position: fixed; inset: 0; z-index: 60; display: grid; place-items: center; padding: 24px }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.35) }
.modal-card {
  position: relative; width: min(680px, 100%); max-height: min(80vh, 720px);
  display: flex; flex-direction: column; background: var(--surface);
  border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
}
.modal-head { display: flex; justify-content: space-between; gap: 16px; padding: 20px 22px 12px }
.modal-head h2 { font-size: 18px }
.modal-head p { margin-top: 4px; font-size: 13px; color: var(--faint) }
.modal-head .icon-btn { margin-left: 0 }
.modal-filters { padding: 0 22px 12px; border-bottom: 1px solid var(--line) }
#bankSearch {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); outline: 0;
}
#bankSearch:focus { border-color: var(--brand) }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px }
.chip {
  padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); color: var(--muted); font-size: 12px; cursor: pointer;
}
.chip.is-on { background: var(--text); color: var(--bg); border-color: var(--text) }
.bank-list { list-style: none; margin: 0; padding: 8px; overflow-y: auto; flex: 1 }
.bank-item { width: 100%; text-align: left; border: 0; background: none; padding: 12px; border-radius: 8px; cursor: pointer }
.bank-item:hover { background: var(--bg) }
.bank-meta { display: flex; gap: 6px; margin-bottom: 4px }
.meta { font-size: 11px; color: var(--faint) }
.meta-hard { color: var(--warn) }
.bank-q { font-size: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden }
.bank-empty { padding: 28px; text-align: center; color: var(--faint) }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 80;
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 999px; font-size: 13px;
}

@media (max-width: 800px) {
  .topbar-inner, main { padding-left: 16px; padding-right: 16px }
  .panes { grid-template-columns: 1fr; gap: 12px }
  .pane-body { max-height: 40vh }
  .vote-buttons { grid-template-columns: 1fr 1fr }
  .table th:nth-child(3), .table td:nth-child(3),
  .table th:nth-child(5), .table td:nth-child(5) { display: none }
  .hero { padding-top: 28px }
  .hero h1 { font-size: 22px }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important } }