:root {
  --canvas: #08090a;
  --surface: #0d0f10;
  --surface-raised: #121416;
  --surface-hover: #151719;
  --fg: #f5f6f6;
  --secondary: #c7cbd1;
  --muted: #858a93;
  --quiet: #5e636b;
  --line-soft: #17191c;
  --line: #202327;
  --line-strong: #2c3035;
  --indigo: #6b76e8;
  --action: #e8e9ea;
  --on-action: #090a0b;
  --green: #6fdf98;
  --green-soft: rgba(111, 223, 152, 0.1);
  --amber: #e8be72;

  --pwn: #f27d83;
  --web: #76aefc;
  --rev: #c895ec;
  --crypto: #65d6b1;
  --forensics: #e5b96d;
  --misc: #909aaa;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: var(--canvas);
  color: var(--fg);
  font-family: "Inter", "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: -0.011em;
  text-rendering: optimizeLegibility;
}

::selection { color: #06120a; background: var(--green); }

a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { color: inherit; }
img { display: block; max-width: 100%; }
h1, h2, h3, p, dl, dd { margin-top: 0; }
h1, h2, h3 { letter-spacing: -0.032em; }

code {
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface-raised);
  color: var(--secondary);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.88em;
}

:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--indigo) 85%, white);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  border-radius: 7px;
  background: var(--action);
  color: var(--on-action);
  transform: translateY(-150%);
  transition: transform 0.15s ease;
}

.skip-link:focus { transform: translateY(0); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 64px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.055);
  background: rgba(8, 9, 10, 0.8);
  backdrop-filter: blur(18px) saturate(135%);
}

.header-inner {
  width: 100%;
  max-width: 1160px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: none;
}

.brand-name { font-size: 15px; font-weight: 600; letter-spacing: -0.025em; }

.global-nav {
  align-self: stretch;
  display: flex;
  align-items: center;
  margin-left: 38px;
}

.global-nav a {
  position: relative;
  height: 100%;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  color: var(--muted);
  font-size: 13px;
  transition: color 0.15s ease;
}

.global-nav a:hover, .global-nav a.active { color: var(--fg); }
.global-nav a.active::after {
  content: "";
  position: absolute;
  right: 12px;
  bottom: -1px;
  left: 12px;
  height: 2px;
  background: var(--green);
}

.header-account {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-chip {
  height: 32px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 9px 3px 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--secondary);
  font-size: 12px;
}

.user-chip img, .user-chip .fallback {
  width: 23px;
  height: 23px;
  border-radius: 50%;
}

.user-chip img { object-fit: cover; }
.user-chip .fallback {
  display: grid;
  place-items: center;
  background: var(--indigo);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
}

main {
  width: 100%;
  max-width: 1160px;
  flex: 1;
  margin: 0 auto;
  padding: 48px 24px 112px;
}

.site-footer {
  border-top: 1px solid var(--line-soft);
  color: var(--quiet);
}

.site-footer > div {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.02em;
}

.site-footer strong { color: var(--muted); font-weight: 550; }
.site-footer span::before { content: "/"; margin-right: 10px; color: var(--line-strong); }

/* Shared controls */
.btn {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--secondary);
  font-size: 13px;
  font-weight: 520;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.btn:hover { border-color: var(--line-strong); background: var(--surface-hover); color: var(--fg); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.58; cursor: wait; }

.btn.primary {
  border-color: var(--action);
  background: var(--action);
  color: var(--on-action);
  font-weight: 600;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), 0 4px 14px rgba(0, 0, 0, 0.15);
}

.btn.primary:hover { border-color: #fff; background: #fff; color: #050606; }
.btn.ghost { background: transparent; color: var(--muted); }
.btn.sm { min-height: 30px; padding: 0 11px; border-color: transparent; font-size: 12px; }

.lead { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.7; }
.page-meta, .category-label, .writeup-meta {
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
}
.category-label, .writeup-meta { color: var(--cat, var(--muted)); }
.writeup-meta { margin-bottom: 6px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.spacer { flex: 1; }
.table-empty { color: var(--quiet); font-size: 12px; }

.badge {
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: none;
  padding: 2px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.015);
  font-size: 10.5px;
  font-weight: 550;
  line-height: 1;
  white-space: nowrap;
}

.badge i { width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.badge.live, .badge.ok { border-color: rgba(111, 223, 152, 0.24); color: var(--green); background: var(--green-soft); }
.badge.done { color: var(--quiet); }
.badge.wait { border-style: dashed; color: var(--quiet); }

.status-tag { align-self: center; font-size: 13px; font-weight: 500; letter-spacing: -0.01em; }
.status-tag.live { color: var(--green); }
.status-tag.ended { color: var(--quiet); }

/* Home */
.metric-strip {
  margin: 28px 0 68px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.018), rgba(255, 255, 255, 0));
  overflow: hidden;
}

.metric-strip > div {
  position: relative;
  min-width: 0;
  min-height: 86px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px 20px;
}

.metric-strip > div + div { border-left: 1px solid var(--line); }
.metric-strip dt { color: var(--quiet); font-size: 10px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.metric-strip dd { margin: 0; color: var(--fg); font-size: 25px; font-weight: 580; line-height: 1; letter-spacing: -0.04em; }
.metric-strip dd small { margin-left: 2px; color: var(--muted); font-size: 12px; font-weight: 500; }
.metric-strip.compact { margin: 4px 0 30px; }
.metric-progress > span { position: absolute; right: 20px; bottom: 18px; left: 66px; height: 3px; overflow: hidden; border-radius: 10px; background: var(--line); }
.metric-progress > span i { display: block; height: 100%; border-radius: inherit; background: var(--green); }

.archive-section { scroll-margin-top: 84px; }

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 16px;
}

.section-heading h2 { margin: 0; font-size: 23px; font-weight: 570; line-height: 1.2; }
.section-count { margin-left: 5px; color: var(--quiet); font-size: 13px; font-weight: 500; vertical-align: 3px; }

[data-competition-list] .section-heading h2 { font-size: 30px; font-weight: 560; letter-spacing: -0.03em; }
[data-competition-list] .section-count { margin-left: 8px; font-size: 15px; vertical-align: 4px; }

.list-controls { display: flex; align-items: center; gap: 8px; }
.search-field {
  width: 190px;
  height: 34px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.018);
  color: var(--quiet);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.search-field:focus-within { border-color: var(--line-strong); background: var(--surface); }
.search-field svg { flex: none; }
.search-field input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--fg); font-size: 12px; }
.search-field input::placeholder { color: var(--quiet); }
.search-field input::-webkit-search-cancel-button { filter: invert(1); opacity: 0.45; }

.filter-group {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.018);
}

.filter-chip {
  height: 28px;
  padding: 0 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--quiet);
  font-size: 11px;
  cursor: pointer;
}

.filter-chip:hover { color: var(--secondary); }
.filter-chip.active { background: var(--surface-hover); color: var(--fg); box-shadow: 0 0 0 1px var(--line) inset; }

.competition-list { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.competition-list-head, .competition-row {
  display: grid;
  grid-template-columns: minmax(218px, 1.65fr) minmax(170px, 1.15fr) minmax(142px, 0.9fr) 74px minmax(120px, 0.8fr) 22px;
  gap: 18px;
  align-items: center;
}

.competition-list-head {
  min-height: 36px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.012);
  color: var(--quiet);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.competition-row {
  min-height: 84px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.14s ease;
}

.competition-row:last-of-type { border-bottom: 0; }
.competition-row:hover { background: rgba(255, 255, 255, 0.024); }
.competition-row:focus-visible { position: relative; z-index: 1; outline-offset: -2px; }

.competition-primary { min-width: 0; }
.row-title-line { display: flex; align-items: center; gap: 10px; min-width: 0; }
.row-title-line h3 {
  margin: 0;
  overflow: hidden;
  color: var(--fg);
  font-size: 15px;
  font-weight: 560;
  line-height: 1.35;
  letter-spacing: -0.022em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.competition-primary p {
  margin: 5px 0 0;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--quiet);
  font-size: 10.5px;
  line-height: 1.3;
}

.category-cluster { min-width: 0; display: flex; align-items: center; flex-wrap: wrap; gap: 5px 9px; }
.category-dot { display: inline-flex; align-items: center; gap: 4px; color: var(--muted); font-size: 9.5px; line-height: 1; }
.category-dot i { width: 5px; height: 5px; border-radius: 50%; background: var(--cat, var(--misc)); }
.category-dot b { font-weight: 500; }
.category-dot small { color: var(--quiet); font-size: 9px; }

.progress-cell { min-width: 0; }
.progress-copy { margin-bottom: 7px; display: flex; align-items: center; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 10px; line-height: 1; }
.progress-copy strong { color: var(--secondary); font-weight: 550; }
.progress-copy small { color: var(--quiet); font-size: 9.5px; }
.progress-track { height: 3px; overflow: hidden; border-radius: 999px; background: var(--line); }
.progress-track span { display: block; height: 100%; border-radius: inherit; background: var(--green); }

.writeup-count { display: flex; align-items: baseline; gap: 3px; }
.writeup-count strong { color: var(--secondary); font-size: 14px; font-weight: 550; }
.writeup-count span { color: var(--quiet); font-size: 9.5px; }
.result-cell { min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.result-cell strong { overflow: hidden; color: var(--secondary); font-size: 11.5px; font-weight: 550; text-overflow: ellipsis; white-space: nowrap; }
.result-cell small { color: var(--quiet); font-size: 9.5px; }
.result-live { color: var(--green); font-size: 11.5px; font-weight: 500; }
.row-arrow { color: var(--quiet); font-family: ui-monospace, monospace; font-size: 14px; transition: color 0.15s ease, transform 0.15s ease; }
a:hover > .row-arrow, .competition-row:hover .row-arrow { color: var(--green); transform: translateX(3px); }

.list-empty { padding: 54px 20px; text-align: center; color: var(--muted); }
.list-empty strong, .list-empty span { display: block; }
.list-empty strong { margin-bottom: 4px; color: var(--secondary); font-size: 13px; font-weight: 550; }
.list-empty span { font-size: 11px; }

/* Shared page heads */
.breadcrumb {
  min-width: 0;
  margin: 0 0 34px;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  color: var(--quiet);
  font-size: 11px;
  white-space: nowrap;
}

.breadcrumb a { color: var(--muted); transition: color 0.14s ease; }
.breadcrumb a:hover { color: var(--fg); }
.breadcrumb span { overflow: hidden; text-overflow: ellipsis; }
.breadcrumb span[aria-hidden] { flex: none; color: var(--line-strong); }

.entity-hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 36px;
  padding: 4px 0 34px;
}

.entity-hero.slim { padding-bottom: 38px; border-bottom: 1px solid var(--line-soft); margin-bottom: 28px; }
.entity-copy { min-width: 0; }
.entity-title-line { display: flex; align-items: center; gap: 12px; min-width: 0; }
.entity-title-line h1, .editor-heading h1 {
  margin: 0;
  color: var(--fg);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 560;
  line-height: 1.1;
  letter-spacing: -0.044em;
}

.entity-copy .lead { margin-top: 13px; max-width: 620px; }
.hero-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; flex-wrap: wrap; flex: none; }

/* Competition detail */
.result-panel {
  margin: 0 0 54px;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 14px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.result-kicker {
  margin-right: 2px;
  padding-right: 16px;
  border-right: 1px solid var(--line);
  color: var(--quiet);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-place { color: var(--fg); font-size: 17px; font-weight: 580; line-height: 1; letter-spacing: -0.02em; }
.result-teams { color: var(--muted); font-size: 12px; }
.result-award { margin-left: auto; color: var(--amber); font-size: 12px; font-weight: 500; }

.challenge-board { margin-top: 48px; }
.board-heading { margin-bottom: 22px; }
.board-heading > p { margin: 0; color: var(--quiet); font-size: 11px; }

.category-section { margin-top: 26px; }
.category-heading {
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 13px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.category-heading > div { display: flex; align-items: center; gap: 9px; }
.category-heading h3 { margin: 0; font-size: 11px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; }
.category-heading > span { color: var(--quiet); font-size: 9.5px; font-family: ui-monospace, monospace; text-transform: uppercase; }
.category-symbol { width: 7px; height: 7px; display: inline-block; flex: none; border-radius: 2px; background: var(--cat, var(--misc)); }

.challenge-list, .version-list { margin: 0; padding: 0; list-style: none; }
.challenge-list { border-bottom: 1px solid var(--line); }
.challenge-row {
  min-height: 58px;
  display: grid;
  grid-template-columns: 28px minmax(210px, 1.3fr) minmax(150px, 1fr) 142px 20px;
  gap: 14px;
  align-items: center;
  padding: 9px 13px;
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.14s ease;
}

.challenge-list li:last-child .challenge-row { border-bottom: 0; }
.challenge-row:hover { background: rgba(255, 255, 255, 0.024); }
.challenge-status { width: 20px; height: 20px; display: grid; place-items: center; color: var(--green); }
.challenge-status svg { display: block; }
.challenge-status.solving::before { content: ""; width: 8px; height: 1.5px; border-radius: 2px; background: var(--line-strong); }
.challenge-name { min-width: 0; overflow: hidden; color: var(--secondary); font-size: 13px; font-weight: 530; text-overflow: ellipsis; white-space: nowrap; }
.challenge-solvers { min-width: 0; overflow: hidden; color: var(--quiet); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.challenge-writeup { justify-self: start; }
.wu-done { color: var(--green); font-size: 11.5px; font-weight: 500; letter-spacing: -0.01em; }
.wu-wait { color: var(--quiet); font-size: 11.5px; }

/* Challenge and document views */
.challenge-hero { padding-bottom: 42px; border-bottom: 1px solid var(--line-soft); margin-bottom: 42px; }
.challenge-meta { margin: 18px 0 0; display: flex; flex-wrap: wrap; gap: 10px 22px; }
.challenge-meta > span { display: flex; align-items: baseline; gap: 7px; color: var(--secondary); font-size: 11px; }
.challenge-meta small { color: var(--quiet); font-size: 9px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }

.content-heading {
  margin: 0 0 14px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.content-heading h2 { margin: 0; font-size: 21px; font-weight: 560; }
.content-heading > p { margin: 0; color: var(--quiet); font-size: 10px; }

.content-surface {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.012);
}

.writeup-body { padding: 28px 32px; }
.archive-notice {
  margin: -8px 0 26px;
  padding: 9px 12px;
  border: 1px solid rgba(107, 118, 232, 0.24);
  border-radius: 7px;
  background: rgba(107, 118, 232, 0.055);
  color: var(--muted);
  font-size: 11px;
}

.empty-state {
  min-height: 210px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 42px 24px;
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  text-align: center;
}

.empty-state h3 { margin: 0 0 7px; color: var(--secondary); font-size: 16px; font-weight: 560; }
.empty-state p { max-width: 460px; margin: 0; color: var(--muted); font-size: 12px; }
.empty-state .btn { margin-top: 20px; }

/* Writeup collection */
.writeup-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
  padding-top: 14px;
}

.toc-panel { position: sticky; top: 92px; max-height: calc(100vh - 116px); overflow: auto; padding: 7px 22px 18px 0; border-right: 1px solid var(--line-soft); }
.toc-title { margin: 0 0 18px; color: var(--secondary); font-size: 13px; font-weight: 560; }
.toc-group + .toc-group { margin-top: 22px; }
.toc-cat { margin: 0 0 7px; display: flex; align-items: center; gap: 8px; color: var(--secondary); font-size: 10px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.toc-cat small { margin-left: auto; color: var(--quiet); font-size: 9px; }
.toc-panel ul { margin: 0; padding: 0 0 0 15px; list-style: none; }
.toc-panel li + li { margin-top: 3px; }
.toc-panel a { display: block; padding: 3px 0; overflow: hidden; color: var(--muted); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; transition: color 0.14s ease; }
.toc-panel a:hover { color: var(--fg); }

.writeup-category { scroll-margin-top: 90px; }
.writeup-category + .writeup-category { margin-top: 50px; }
.writeup-category > header { margin-bottom: 12px; display: flex; align-items: center; gap: 9px; }
.writeup-category > header h2 { margin: 0; font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.writeup-category > header small { margin-left: auto; color: var(--quiet); font-size: 9.5px; text-transform: uppercase; }
.writeup-entry { scroll-margin-top: 84px; padding: 26px 30px; }
.writeup-entry + .writeup-entry { margin-top: 14px; }
.writeup-head {
  margin-bottom: 25px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}

.writeup-head h3 { margin: 0; font-size: 20px; font-weight: 560; }
.writeup-head h3 a:hover { color: var(--green); }
.writeup-head > span { color: var(--quiet); font-size: 10px; }

/* Editor */
.editor-heading {
  margin-bottom: 18px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
}

.editor-actions { display: flex; align-items: center; gap: 14px; }
.editor-actions #save-status { min-width: 118px; color: var(--muted); font-size: 10px; text-align: right; }
.notice { margin: 0 0 14px; padding: 10px 13px; border: 1px solid rgba(107, 118, 232, 0.22); border-radius: 7px; background: rgba(107, 118, 232, 0.055); color: var(--muted); font-size: 11px; }
.notice strong { color: var(--secondary); font-weight: 550; }
.editor-shell { overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.editor-footnote { margin-top: 10px; display: flex; justify-content: space-between; gap: 16px; color: var(--quiet); font-size: 9.5px; }

/* Records and forms */
.record-list { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.record-row {
  min-height: 68px;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) 150px 20px;
  gap: 18px;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.14s ease;
}

.record-list li:last-child .record-row { border-bottom: 0; }
.record-row:hover { background: rgba(255, 255, 255, 0.024); }
.version-index { width: 44px; padding: 3px 0; border: 1px solid var(--line); border-radius: 5px; color: var(--muted); font-family: ui-monospace, monospace; font-size: 10px; text-align: center; }
.record-primary { min-width: 0; display: flex; flex-direction: column; }
.record-primary strong { overflow: hidden; color: var(--secondary); font-size: 12px; font-weight: 550; text-overflow: ellipsis; white-space: nowrap; }
.record-primary small, .record-row time { color: var(--quiet); font-size: 10px; }
.record-row time { text-align: right; }

.form-panel {
  max-width: 760px;
  display: flex;
  flex-direction: column;
  gap: 19px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.012);
}

.form-section-heading { margin-bottom: 3px; display: flex; align-items: flex-start; gap: 14px; }
.form-section-heading > span { color: var(--green); font-family: ui-monospace, monospace; font-size: 10px; }
.form-section-heading h2 { margin: 0 0 3px; font-size: 16px; font-weight: 560; }
.form-section-heading p { margin: 0; color: var(--quiet); font-size: 10px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-panel label { display: flex; flex-direction: column; gap: 7px; }
.form-panel label > span { color: var(--muted); font-size: 11px; font-weight: 500; }
.form-panel input, .form-panel textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  outline: 0;
  background: var(--surface);
  color: var(--fg);
  font-size: 12px;
  transition: border-color 0.14s ease, background 0.14s ease;
}

.form-panel input { height: 40px; padding: 0 12px; }
.form-panel textarea { min-height: 130px; padding: 10px 12px; line-height: 1.6; resize: vertical; }
.form-panel input::placeholder, .form-panel textarea::placeholder { color: var(--quiet); }
.form-panel input:focus, .form-panel textarea:focus { border-color: var(--indigo); background: var(--surface-raised); }
.form-actions { margin-top: 5px; display: flex; justify-content: flex-end; gap: 8px; padding-top: 20px; border-top: 1px solid var(--line-soft); }

/* Auth and state pages */
.auth-page main { display: flex; align-items: center; padding-top: 64px; padding-bottom: 80px; }
.auth-shell {
  width: 100%;
  min-height: 540px;
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.auth-visual {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-right: 1px solid var(--line);
  background: #0a0c0d;
}

.auth-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 46%, rgba(111, 223, 152, 0.11), transparent 58%);
}

.auth-visual img {
  position: relative;
  width: min(66%, 300px);
  object-fit: contain;
  filter: drop-shadow(0 18px 36px rgba(0, 0, 0, 0.5));
}
.auth-panel { display: flex; flex-direction: column; justify-content: center; padding: 58px; }
.auth-panel h1 { margin: 0 0 20px; font-size: clamp(34px, 4vw, 48px); font-weight: 560; line-height: 1.13; letter-spacing: -0.052em; }
.auth-panel > p { max-width: 390px; margin-bottom: 28px; color: var(--muted); font-size: 13px; line-height: 1.75; }
.auth-button { width: 100%; max-width: 310px; justify-content: space-between; }
.auth-panel > small { margin-top: 14px; color: var(--quiet); font-size: 9.5px; }

.message-panel {
  min-height: 460px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  text-align: center;
}

.message-panel h1 { margin: 0 0 12px; font-size: 27px; font-weight: 560; }
.message-panel > p { max-width: 480px; margin-bottom: 24px; color: var(--muted); font-size: 13px; }

/* Toast UI integration */
.toastui-editor-dark.toastui-editor-defaultUI {
  border: 0 !important;
  border-radius: 0 !important;
  background: var(--surface) !important;
}

.toastui-editor-dark .toastui-editor-defaultUI-toolbar { border-color: var(--line) !important; background: var(--surface-raised) !important; }
.toastui-editor-dark .toastui-editor-md-container,
.toastui-editor-dark .toastui-editor-ww-container,
.toastui-editor-dark .toastui-editor-md-preview,
.toastui-editor-dark .toastui-editor-main { background: var(--surface) !important; }
.toastui-editor-dark .toastui-editor-mode-switch { border-color: var(--line) !important; background: var(--surface-raised) !important; }
.toastui-editor-contents { color: var(--secondary) !important; font-family: "Inter", "Pretendard Variable", Pretendard, sans-serif !important; font-size: 14px !important; line-height: 1.78 !important; }
.toastui-editor-contents h1, .toastui-editor-contents h2, .toastui-editor-contents h3, .toastui-editor-contents h4 { color: var(--fg) !important; border-color: var(--line) !important; font-weight: 580 !important; }
.toastui-editor-contents h1 { font-size: 27px !important; }
.toastui-editor-contents h2 { margin-top: 34px !important; font-size: 21px !important; }
.toastui-editor-contents h3 { margin-top: 28px !important; font-size: 17px !important; }
.toastui-editor-contents p, .toastui-editor-contents li { color: var(--secondary) !important; }
.toastui-editor-contents a { color: #8da1ff !important; }
.toastui-editor-contents blockquote { border-color: var(--green) !important; background: var(--green-soft) !important; color: var(--secondary) !important; }
.toastui-editor-contents pre { border: 1px solid var(--line) !important; border-radius: 8px !important; background: #090b0c !important; }
.toastui-editor-contents code { border: 0; background: var(--surface-raised); color: #c8d1da; }
.toastui-editor-contents table th, .toastui-editor-contents table td { border-color: var(--line) !important; }
.toastui-editor-contents table th { background: var(--surface-raised) !important; color: var(--fg) !important; }
.toastui-editor-contents hr { border-color: var(--line) !important; }

/* Category colors */
.c-pwn { --cat: var(--pwn); }
.c-web { --cat: var(--web); }
.c-rev { --cat: var(--rev); }
.c-crypto { --cat: var(--crypto); }
.c-forensics { --cat: var(--forensics); }
.c-misc { --cat: var(--misc); }

/* Responsive */
@media (max-width: 960px) {
  .competition-list-head, .competition-row {
    grid-template-columns: minmax(210px, 1.4fr) minmax(135px, 0.8fr) minmax(125px, 0.85fr) 68px minmax(105px, 0.7fr) 18px;
    gap: 12px;
  }
  .category-dot b { display: none; }
  .category-dot { gap: 3px; }
}

@media (max-width: 780px) {
  .header-inner, main, .site-footer > div { padding-right: 18px; padding-left: 18px; }
  main { padding-top: 38px; padding-bottom: 86px; }
  .metric-strip { margin-bottom: 54px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .list-controls { width: 100%; }
  .search-field { flex: 1; width: auto; }
  .competition-list-head { display: none; }
  .competition-row {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto auto;
    gap: 14px 18px;
    min-height: 0;
    padding: 18px 14px;
  }
  .competition-primary { grid-column: 1; grid-row: 1; }
  .result-cell { grid-column: 2; grid-row: 1; align-items: flex-end; }
  .category-cluster { grid-column: 1 / -1; grid-row: 2; }
  .category-dot b { display: inline; }
  .progress-cell { grid-column: 1; grid-row: 3; }
  .writeup-count { grid-column: 2; grid-row: 3; justify-content: flex-end; }
  .writeup-count::before { content: "writeups"; margin-right: 5px; color: var(--quiet); font-size: 8px; text-transform: uppercase; }
  .competition-row > .row-arrow { display: none; }
  .entity-hero { align-items: flex-start; flex-direction: column; }
  .hero-actions { justify-content: flex-start; }
  .challenge-row { grid-template-columns: 26px minmax(0, 1fr) 125px 18px; }
  .challenge-solvers { display: none; }
  .writeup-layout { grid-template-columns: 1fr; gap: 28px; }
  .toc-panel { position: static; max-height: none; padding: 16px 18px; border: 1px solid var(--line); border-radius: 9px; }
  .toc-panel nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
  .toc-panel nav > .toc-title { grid-column: 1 / -1; }
  .toc-group + .toc-group { margin-top: 0; }
  .auth-shell { grid-template-columns: 0.85fr 1.15fr; }
  .auth-panel { padding: 38px; }
}

@media (max-width: 620px) {
  .site-header { height: 58px; }
  .global-nav { margin-left: 15px; }
  .global-nav a { padding: 0 8px; }
  .global-nav a.active::after { right: 8px; left: 8px; }
  .user-chip { padding-right: 4px; }
  .user-chip > span:last-child { display: none; }
  .header-account .btn { padding-right: 7px; padding-left: 7px; }
  main { padding-top: 30px; }
  .metric-strip { grid-template-columns: 1fr 1fr; }
  .metric-strip > div { min-height: 76px; padding: 14px 16px; }
  .metric-strip > div + div { border-left: 0; }
  .metric-strip > div:nth-child(even) { border-left: 1px solid var(--line); }
  .metric-strip > div:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .list-controls { align-items: stretch; flex-direction: column; }
  .search-field { width: 100%; flex: none; }
  .filter-group { width: 100%; }
  .filter-chip { flex: 1; }
  .category-dot { font-size: 9px; }
  .entity-title-line { align-items: flex-start; flex-direction: column; }
  .entity-title-line h1, .editor-heading h1 { font-size: 30px; }
  .entity-hero .hero-actions, .challenge-hero .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1; }
  .metric-strip.compact { margin-top: 0; }
  .metric-progress > span { right: 16px; left: 55px; }
  .result-award { margin-left: 0; }
  .board-heading > p { display: none; }
  .challenge-row { grid-template-columns: 24px minmax(0, 1fr) 18px; gap: 10px; padding: 11px 8px; }
  .challenge-writeup { grid-column: 2; grid-row: 2; }
  .challenge-row > .row-arrow { grid-column: 3; grid-row: 1 / 3; }
  .challenge-name { white-space: normal; }
  .challenge-meta { align-items: flex-start; flex-direction: column; gap: 5px; }
  .content-heading { align-items: flex-start; flex-direction: column; }
  .content-heading > p { line-height: 1.5; }
  .writeup-body, .writeup-entry { padding: 21px 18px; }
  .toc-panel nav { grid-template-columns: 1fr; }
  .writeup-head { align-items: flex-start; flex-direction: column; }
  .writeup-head h3 { font-size: 18px; }
  .editor-heading { align-items: stretch; flex-direction: column; }
  .editor-actions { justify-content: space-between; }
  .editor-actions #save-status { min-width: 0; text-align: left; }
  .editor-footnote { flex-direction: column; gap: 2px; }
  .record-row { grid-template-columns: 48px minmax(0, 1fr) 16px; gap: 10px; }
  .record-row time { grid-column: 2; grid-row: 2; text-align: left; }
  .record-row > .row-arrow { grid-column: 3; grid-row: 1 / 3; }
  .form-panel { padding: 20px 16px; }
  .form-grid { grid-template-columns: 1fr; }
  .auth-page main { padding-top: 30px; }
  .auth-shell { min-height: 0; grid-template-columns: 1fr; }
  .auth-visual { min-height: 220px; border-right: 0; border-bottom: 1px solid var(--line); }
  .auth-visual img { width: 170px; }
  .auth-panel { padding: 34px 24px 38px; }
  .auth-panel h1 { font-size: 34px; }
  .auth-button { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}