:root {
  --paper: #f2f2f2;
  --ink: #000000;
  --muted: #41273c;
  --line: #d4d4d4;
  --card: #ffffff;
  --accent: #ee0c5d;
  --accent-ink: #ffffff;
  --header: #41273c;
  --button: #e40c5b;
  --button-hover: #b70d4e;
  --good: #f2f2f2;
  --good-ink: #41273c;
  --bad: #fff1ee;
  --bad-ink: #41273c;
  --pending: #fff8e8;
  --pending-ink: #41273c;
  --orange: #ff3312;
  --yellow: #fcb117;
  --shadow: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, "Segoe UI", sans-serif;
  font-size: 18px;
  line-height: 1.5;
}

a { color: var(--accent); }

h1, h2, h3 {
  font-family: Arial, "Segoe UI", sans-serif;
  font-weight: 700;
  line-height: 1.15;
  margin: 0;
}

h1 { font-size: 2.4rem; }
h2 { font-size: 1.5rem; margin-bottom: 0.6rem; }
h3 { font-size: 1.2rem; }

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: var(--header);
  color: #ffffff;
}

.top a, .top button.link {
  color: #ffffff;
  text-decoration: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
}

.brand-mark {
  border: 1px solid #ffffff;
  padding: 0.1rem 0.4rem;
  font-family: Arial, "Segoe UI", sans-serif;
}

.top nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-solid {
  background: var(--accent);
  color: var(--accent-ink) !important;
  padding: 0.35rem 0.7rem;
}

button.link {
  background: none;
  border: 0;
  font: inherit;
  cursor: pointer;
  padding: 0;
}

main {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.hero { max-width: 42rem; }

.eyebrow {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.lede { font-size: 1.2rem; color: var(--muted); }

.hero-actions, .filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.button {
  display: inline-block;
  background: var(--button);
  color: var(--accent-ink);
  border: 0;
  text-decoration: none;
  padding: 0.55rem 0.9rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.button:hover { background: var(--button-hover); }

.button-quiet {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}

.stats, .split {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
}

.split { grid-template-columns: 1.2fr 1fr; }

.stats div {
  background: var(--card);
  border-top: 3px solid var(--accent);
  padding: 0.9rem 1rem;
}

.stats strong {
  display: block;
  font-family: Arial, "Segoe UI", sans-serif;
  font-size: 2rem;
}

.stats span, .note, .meta, .user { color: var(--muted); }

.github-link { margin: 0.35rem 0 0; }
.github-link a { font-weight: 700; color: var(--accent); }

.badge-ready,
.state-ready {
  color: var(--accent);
  font-weight: 700;
}

.summary-box { margin: 1rem 0; }

.ref-panel {
  margin: 1.5rem 0 0;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 0.7rem 1rem;
}

.ref-panel > summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--muted);
}

.ref-body { margin-top: 0.8rem; }
.flag-ref {
  display: inline-block;
  word-break: break-all;
  margin-top: 0.2rem;
}

code {
  font-family: Consolas, "Courier New", monospace;
  background: var(--paper);
  padding: 0.05rem 0.3rem;
}

.panel, .challenge, .category, .page-head {
  margin-bottom: 1.5rem;
}

.narrow { max-width: 28rem; }

.stack-form, .flag-form {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
}

label { display: grid; gap: 0.25rem; font-weight: 700; }

input, select {
  font: inherit;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--line);
  background: white;
  color: var(--ink);
}

.account-create {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: end;
  margin: 0 0 1rem;
}

.account-create label { font-size: 0.9rem; }

.manage-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 1.5rem;
  align-items: start;
}

.page-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
}

.filter-search {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: flex-end;
  margin: 0.2rem 0 0.4rem;
}

.filter-search input[type="search"] { min-width: min(100%, 18rem); }

.filter-block { margin: 0.8rem 0 0.2rem; }
.filter-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.chip {
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  padding: 0.25rem 0.6rem;
}

.chip.is-on {
  background: var(--header);
  color: #ffffff;
  border-color: var(--header);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.8rem;
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 0.9rem;
  text-decoration: none;
  color: inherit;
  min-height: 8.5rem;
}

.card h3 { margin: 0.6rem 0 0.2rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.card-top, .actions {
  display: flex;
  justify-content: space-between;
  gap: 0.4rem;
  align-items: center;
}

.points { font-weight: 700; }
.state { color: var(--muted); font-size: 0.85rem; }
.card.is-solved { border-color: var(--accent); }
.card.is-closed { opacity: 0.62; }

.description {
  white-space: pre-wrap;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1rem 1.1rem;
  margin: 1rem 0;
}

.lab-box, .files { margin: 1rem 0 1.4rem; }

.files { list-style: none; padding: 0; }
.files li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
  padding: 0.35rem 0;
}

.banner {
  padding: 0.7rem 0.9rem;
  margin: 1rem 0;
}

.banner.good { background: var(--good); color: var(--good-ink); border-left: 4px solid var(--accent); }
.banner.bad { background: var(--bad); color: var(--bad-ink); border-left: 4px solid var(--orange); }
.banner.pending { background: var(--pending); color: var(--pending-ink); border-left: 4px solid var(--yellow); }

.board {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
}

.board th, .board td {
  text-align: left;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.board th { font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; }

.actions form { display: inline; }

@media (max-width: 800px) {
  h1 { font-size: 1.9rem; }
  .stats, .split, .page-head, .top, .manage-grid { display: block; }
  .stats div, .top nav { margin-top: 0.8rem; }
  .top nav { display: flex; }
}