/* Page structure: welcome screen, sticky bar, and the 12-column grid. */
* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
}

.welcome {
  max-width: 520px;
  margin: 0 auto;
  padding: 7vh 16px 48px;
  display: grid;
  gap: 20px;
}

.sticky { position: sticky; top: 0; z-index: 6; background: var(--bg); border-bottom: 1px solid var(--line); }

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 20px;
  padding: 8px clamp(16px, 2.5vw, 36px) 0;
}
.brand { display: flex; align-items: center; gap: 8px; font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 18px; padding-bottom: 8px; }
.tabs { display: flex; gap: 2px; }
.tabs button {
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  padding: 8px 14px 10px;
  font-weight: 600;
  color: var(--muted);
}
.tabs button:hover:not(:disabled) { color: var(--fg); }
.tabs button[aria-selected="true"] { color: var(--fg); border-bottom-color: var(--accent); }
.controls { display: flex; align-items: center; gap: 10px; margin-left: auto; padding-bottom: 8px; }
.controls select { width: 180px; }

.content { padding: 28px clamp(16px, 2.5vw, 36px) 64px; }
.view { min-width: 0; }

.grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gap-y) var(--gap-x); align-items: start; }
.c3 { grid-column: span 3; }
.c4 { grid-column: span 4; }
.c5 { grid-column: span 5; }
.c7 { grid-column: span 7; }
.c8 { grid-column: span 8; }
.c12 { grid-column: span 12; }
.col { display: grid; gap: var(--gap-y); min-width: 0; align-content: start; }

.hero { order: -2; display: grid; gap: 14px; }

h1 {
  font-family: var(--display);
  font-weight: 800;
  font-stretch: 80%;
  font-size: clamp(44px, 7.5vw, 116px);
  line-height: 0.98;
  margin: 0;
  text-wrap: balance;
  letter-spacing: -0.02em;
}
h2 { font-family: var(--display); font-weight: 700; font-size: 20px; line-height: 1.2; margin: 0 0 12px; }
h3 { font-size: 14px; font-weight: 600; margin: 0 0 8px; }

.lede { font-size: 18px; margin: 0; max-width: 64ch; }
.note { font-size: 13.5px; color: var(--muted); margin: 8px 0 0; max-width: 80ch; }
.note:empty { display: none; }
.hint { font-size: 12.5px; color: var(--muted); margin: 0; }
.hint:empty { display: none; }
.err { color: var(--out); font-size: 13.5px; margin: 0; font-weight: 500; }

.bar { height: 6px; background: var(--line); margin-top: 10px; }
.bar i { display: block; height: 100%; min-width: 4px; max-width: 100%; background: var(--in); }
.progress { margin: 0; font-size: 14px; font-weight: 500; }

@media (max-width: 1180px) {
  .c3 { grid-column: span 6; }
  .c4, .c5, .c7, .c8 { grid-column: span 12; }
}

@media (max-width: 720px) {
  .sticky { position: static; }
  .brand span { display: none; }
  .controls { width: 100%; flex-wrap: wrap; margin-left: 0; }
  .controls select { flex: 1; min-width: 130px; width: auto; }
  :root { --gap-y: 36px; }
  .grid { grid-template-columns: minmax(0, 1fr); }
  .c3, .c4, .c5, .c7, .c8, .c12 { grid-column: auto; }
}