/* ---------- site header / footer ---------- */
.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.5rem; padding-block: 0.8rem; }
.brand { font-family: var(--font-display); font-weight: 700; font-size: var(--step-1); color: var(--ink); text-decoration: none; margin-right: auto; }
.site-nav { display: flex; gap: 1.1rem; }
.site-nav a { color: var(--ink-2); text-decoration: none; font-size: 0.95rem; }
.site-nav a[aria-current="page"], .site-nav a:hover { color: var(--ink); }
.model-picker { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; color: var(--ink-2); }
.model-picker select { padding: 0.35rem 0.5rem; font-size: 0.9rem; min-width: 0; max-width: min(24rem, 70vw); text-overflow: ellipsis; }
.site-footer { border-top: 1px solid var(--line); padding-block: 1.5rem; color: var(--ink-2); font-size: var(--step--1); }
.site-footer p { margin: 0; max-width: none; }

/* ---------- home ---------- */
.hero { padding-block: clamp(2.5rem, 7vw, 5rem) clamp(2rem, 5vw, 3.5rem); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero h1 { margin-bottom: 1.1rem; max-width: 14ch; }
.hero .lede { font-size: var(--step-1); color: var(--ink-2); max-width: 46ch; }
.hero .actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.5rem; }

.section { padding-block: clamp(2rem, 5vw, 3.5rem); border-top: 1px solid var(--line); }
.section > .wrap > h2 { margin-bottom: 1.25rem; }
.rows { list-style: none; margin: 0; padding: 0; }
.row {
  display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto; gap: 0.5rem 2rem; align-items: baseline;
  padding: 1.15rem 0; border-bottom: 1px solid var(--line); text-decoration: none; color: inherit;
}
.row:first-child { border-top: 1px solid var(--line); }
.row:hover .row__title { text-decoration: underline; text-underline-offset: 4px; }
.row__title { font-family: var(--font-display); font-size: var(--step-2); font-weight: 600; margin: 0; }
.row__tag { margin: 0.2rem 0 0; color: var(--ink-2); max-width: 48ch; }
.row__meta { color: var(--ink-2); font-size: 0.92rem; }
.progress { display: flex; gap: 0.3rem; align-items: center; }
.pip { width: 0.7rem; height: 0.7rem; border-radius: 50%; border: 1.5px solid var(--ink-2); }
.pip--done { background: var(--danger); border-color: var(--danger); }

/* ---------- challenge page ---------- */
.play { padding-block: clamp(1.5rem, 4vw, 2.5rem) 4rem; }
.play .wrap { display: grid; grid-template-columns: minmax(0, 26rem) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.brief { position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow: auto; padding-right: 0.5rem; }
.brief h1 { font-size: var(--step-3); margin-bottom: 0.5rem; }
.brief .kicker { color: var(--ink-2); font-size: 0.92rem; margin-bottom: 1rem; }
.objective { border-left: 3px solid var(--danger); padding: 0.2rem 0 0.2rem 1rem; margin: 1.25rem 0; }
.objective strong { font-family: var(--font-display); font-size: var(--step-1); }
.objective p { margin: 0.25rem 0 0; }
.victim { margin: 1rem 0; padding: 0.8rem 1rem; background: var(--surface-2); border-radius: var(--radius); font-size: 0.95rem; }
.victim b { display: block; font-size: 0.85rem; color: var(--ink-2); font-weight: 600; margin-bottom: 0.15rem; }
.brief details { margin: 0.75rem 0; }
.brief summary { cursor: pointer; font-weight: 600; }
.brief ul { padding-left: 1.2rem; margin: 0.5rem 0; }
.brief li { margin-bottom: 0.4rem; }

.lab > * + *, .result > * + * { margin-top: 1.5rem; }
.levels { display: flex; flex-wrap: wrap; gap: 0.4rem; border-bottom: 1px solid var(--line); }
.levels button {
  font: inherit; background: none; border: none; border-bottom: 3px solid transparent; padding: 0.5rem 0.9rem;
  color: var(--ink-2); cursor: pointer; margin-bottom: -1px;
}
.levels button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--ink); font-weight: 600; }
.levels .done::after { content: " \2713"; color: var(--danger); }
.level-info h2 { font-size: var(--step-1); }
.level-info ul { padding-left: 1.2rem; margin: 0.4rem 0 0.8rem; }
.hint { margin-top: 0.5rem; font-size: 0.95rem; }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem; }
.field + .field { margin-top: 1rem; }
.field label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
.field .help { font-size: 0.88rem; color: var(--ink-2); margin: 0.3rem 0 0; }
.form-actions { display: flex; align-items: center; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }
.error { color: var(--danger); font-weight: 600; margin: 0; }

@media (max-width: 40rem) {
  .model-picker { flex: 1 1 100%; min-width: 0; }
  .model-picker select { flex: 1; width: 0; max-width: none; }
}
@media (max-width: 62rem) {
  .hero .wrap, .play .wrap { grid-template-columns: minmax(0, 1fr); }
  .brief { position: static; max-height: none; overflow: visible; padding-right: 0; }
  .row { grid-template-columns: minmax(0, 1fr); }
}