:root {
  --bg: #f6f7f9; --panel: #ffffff; --ink: #1c2430; --muted: #5b6573; --line: #dfe3e8;
  --navy: #1f3864; --navy-ink: #ffffff; --accent: #2f6fde; --accent-soft: #e8f0ff;
  --open: #b42318; --open-soft: #fde8e6; --contest: #9a6700; --contest-soft: #fff4d6;
  --solved: #1a7f4b; --solved-soft: #e3f5ea; --thin: #6b7280; --thin-soft: #eef0f3;
  --radius: 10px; --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 10px rgba(16, 24, 40, .04);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f141b; --panel: #171e27; --ink: #e8ecf1; --muted: #9aa5b4; --line: #2a3340;
    --accent-soft: #1a2a4a; --open-soft: #3a1a18; --contest-soft: #3a2f10; --solved-soft: #12301f; --thin-soft: #222a34;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  }
}
:root[data-theme="dark"] {
  --bg: #0f141b; --panel: #171e27; --ink: #e8ecf1; --muted: #9aa5b4; --line: #2a3340;
  --accent-soft: #1a2a4a; --open-soft: #3a1a18; --contest-soft: #3a2f10; --solved-soft: #12301f; --thin-soft: #222a34;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 15px/1.55 "Malgun Gothic", "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif; }
a { color: var(--accent); }
code { font-family: Consolas, "D2Coding", monospace; font-size: .92em; }

.top { background: var(--navy); color: var(--navy-ink); padding: 16px 16px 0; }
.brand { display: flex; gap: 14px; align-items: center; max-width: 1200px; margin: 0 auto; }
.logo { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: #fff; color: var(--navy); font-weight: 800; letter-spacing: .5px; }
.brand h1 { margin: 0; font-size: 20px; }
.sub { margin: 2px 0 0; opacity: .85; font-size: 13px; }
.tabs { display: flex; gap: 4px; max-width: 1200px; margin: 14px auto 0; overflow-x: auto; }
.tab { background: transparent; color: #cfd8e6; border: 0; padding: 10px 14px; border-radius: 8px 8px 0 0; cursor: pointer; font-size: 14px; white-space: nowrap; }
.tab.is-active { background: var(--bg); color: var(--ink); font-weight: 700; }

main { max-width: 1200px; margin: 0 auto; padding: 16px; }
.panel { display: none; }
.panel.is-active { display: block; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 8px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 6px 12px; border-radius: 999px; cursor: pointer; font-size: 13px; }
.chip.is-on { background: var(--navy); color: #fff; border-color: var(--navy); }
select, input[type="search"], textarea { border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 8px; padding: 8px 10px; font: inherit; }
input[type="search"] { min-width: 220px; flex: 1; }
textarea { width: 100%; resize: vertical; }
.toggle { font-size: 13px; color: var(--muted); display: flex; gap: 6px; align-items: center; }
.hint { color: var(--muted); font-size: 13px; margin: 4px 0 10px; }
.muted { color: var(--muted); }

.layout { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(320px, 1fr); gap: 16px; align-items: start; }
.table-wrap { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--thin-soft); font-size: 12px; color: var(--muted); font-weight: 700; position: sticky; top: 0; white-space: nowrap; }
td.num, th.num { text-align: right; white-space: nowrap; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: var(--accent-soft); }
tbody tr.is-selected { background: var(--accent-soft); outline: 2px solid var(--accent); outline-offset: -2px; }
.theme-name { font-weight: 600; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; white-space: nowrap; }
.badge.open { background: var(--open-soft); color: var(--open); }
.badge.contest { background: var(--contest-soft); color: var(--contest); }
.badge.solved { background: var(--solved-soft); color: var(--solved); }
.badge.thin { background: var(--thin-soft); color: var(--thin); }
.badge.kind-b { background: var(--open-soft); color: var(--open); }
.badge.kind-r { background: var(--solved-soft); color: var(--solved); }
.badge.ex { background: var(--thin-soft); color: var(--thin); text-decoration: line-through; }
.judge { font-size: 12px; color: var(--muted); }

.detail { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px 16px; position: sticky; top: 12px; max-height: calc(100vh - 24px); overflow: auto; }
.detail h2 { margin: 0 0 4px; font-size: 18px; }
.detail .meta { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.detail h3 { font-size: 14px; margin: 14px 0 6px; }
.ev { border-left: 3px solid var(--line); padding: 6px 10px; margin: 6px 0; font-size: 14px; }
.ev.b { border-color: var(--open); }
.ev.r { border-color: var(--solved); }
.ev.ex { opacity: .55; }
.ev q { font-style: normal; }
.ev .src { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }
.ft { background: var(--thin-soft); border-radius: 8px; padding: 8px 10px; margin: 6px 0; font-size: 13px; }
.ft b { color: var(--ink); }
.placeholder { color: var(--muted); }
.verdict-box { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 6px 0; }
.verdict-box label { display: inline-flex; gap: 4px; align-items: center; font-size: 13px; cursor: pointer; }
.memo { width: 100%; min-height: 60px; }
.saved { font-size: 12px; color: var(--solved); }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 18px; margin-bottom: 14px; }
.card h2 { font-size: 17px; margin: 0 0 6px; }
.card h3 { font-size: 15px; margin: 14px 0 6px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 10px 0; }
.btn { display: inline-block; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 8px 14px; border-radius: 8px; cursor: pointer; font: inherit; text-decoration: none; }
.btn.primary { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn:disabled { opacity: .5; cursor: default; }
.result { margin-top: 8px; }
.result .kind { font-weight: 700; }
ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }

.axis { margin-bottom: 16px; }
.axis h2 { font-size: 16px; margin: 0 0 2px; }
.axis .q { font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.item { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.item.ex { opacity: .6; }
.item .quote { color: var(--muted); font-size: 13px; }

.ref { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; display: grid; grid-template-columns: 64px 1fr; gap: 10px; }
.ref .lab { font-family: Consolas, monospace; font-size: 12px; color: var(--muted); }
.ref .cite { font-size: 12px; color: var(--muted); }
.level-head { margin: 14px 0 4px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .3px; }

.warn { background: var(--contest-soft); border: 1px solid var(--contest); color: var(--contest); border-radius: var(--radius); padding: 9px 12px; font-size: 13px; margin: 8px 0; }
.kw { display: inline-block; background: var(--thin-soft); border-radius: 999px; padding: 3px 10px; margin: 2px 4px 2px 0; font-size: 12.5px; }
.sent { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.sent .meta { font-size: 12px; color: var(--muted); }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 24px 16px; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .detail { position: static; max-height: none; }
  th.num, td.num { display: none; }
  th { white-space: normal; }
  .ref { grid-template-columns: 1fr; }
}