:root {
  --chalk: #f2f4fa;
  --paper: #ffffff;
  --ink: #101426;
  --ultramarine: #2c3cf5;
  --marigold: #ffb627;
  --mint: #0f8f66;
  --error: #c6283b;
  --line: #c9cfe3;
  --muted: #566080;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "Figtree", "Segoe UI", system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--chalk);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1rem;
  line-height: 1.5;
}

.page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  align-items: start;
}

/* ---------- Intro ---------- */
.intro h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.25rem, 7vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  max-width: 14ch;
}

.lede {
  font-size: 1.0625rem;
  color: var(--muted);
  max-width: 44ch;
  margin: 0 0 2rem;
}

/* Banner-size motif: the one memorable element */
.sizes {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: auto auto;
  gap: 0.75rem;
  max-width: 28rem;
}

.size {
  display: flex;
  align-items: flex-end;
  padding: 0.6rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 6px;
}

.s-square { grid-column: 1 / 4; aspect-ratio: 1 / 1; background: var(--ultramarine); color: #fff; }
.s-story  { grid-column: 4 / 7; grid-row: 1 / 3; background: var(--ink); color: #fff; }
.s-wide   { grid-column: 1 / 4; aspect-ratio: 1.91 / 1; background: var(--marigold); color: var(--ink); }
.s-time   {
  display: none;
}

/* ---------- Form panel ---------- */
.panel {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 12px;
  padding: 1.5rem 1.25rem 1.75rem;
  box-shadow: 6px 6px 0 var(--ink);
}

.panel h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
}

.field { margin-bottom: 1.1rem; }

label {
  display: block;
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 0.35rem;
}

input {
  width: 100%;
  padding: 0.75rem 0.85rem;
  font: inherit;
  color: var(--ink);
  background: var(--chalk);
  border: 1.5px solid var(--line);
  border-radius: 8px;
  transition: border-color 0.15s, background-color 0.15s;
}

input:hover { border-color: var(--muted); }

input:focus-visible {
  outline: 3px solid var(--marigold);
  outline-offset: 1px;
  border-color: var(--ink);
  background: #fff;
}

input[aria-invalid="true"] {
  border-color: var(--error);
  background: #fff5f6;
}

.hint, .error {
  margin: 0.35rem 0 0;
  font-size: 0.8125rem;
}

.hint { color: var(--muted); }
.error { color: var(--error); font-weight: 500; min-height: 0; }
.error:empty { display: none; }

.trap {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.submit, .again {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border-radius: 8px;
  padding: 0.85rem 1.25rem;
  min-height: 3rem;
}

.submit {
  width: 100%;
  margin-top: 0.4rem;
  color: #fff;
  background: var(--ultramarine);
  border: 2px solid var(--ink);
  transition: transform 0.12s, box-shadow 0.12s;
}

.submit:hover:not(:disabled) { transform: translate(-2px, -2px); box-shadow: 3px 3px 0 var(--ink); }
.submit:active:not(:disabled) { transform: none; box-shadow: none; }
.submit:focus-visible, .again:focus-visible { outline: 3px solid var(--marigold); outline-offset: 2px; }
.submit:disabled { opacity: 0.65; cursor: progress; }

.form-status {
  margin: 0.9rem 0 0;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--error);
}
.form-status:empty { display: none; }

/* ---------- Success state ---------- */
.done h3 {
  font-family: var(--display);
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
  color: var(--mint);
}
.done p { margin: 0 0 1.25rem; color: var(--muted); }
.done:focus { outline: none; }

.again {
  background: transparent;
  color: var(--ink);
  border: 2px solid var(--ink);
}
.again:hover { background: var(--chalk); }

[hidden] { display: none !important; }

/* ---------- Wider screens ---------- */
@media (min-width: 640px) {
  .page { padding: 3rem 2rem 4rem; }
  .panel { padding: 2rem 2rem 2.25rem; }
}

@media (min-width: 900px) {
  .page {
    grid-template-columns: 1.1fr 1fr;
    gap: 4rem;
    align-items: center;
    padding: 4rem 2.5rem;
  }
  .s-time {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    grid-column: 1 / 7;
    background: transparent;
    border: 2px solid var(--ink);
    color: var(--ink);
    gap: 0;
    align-items: flex-start;
  }
  .s-time strong { font-family: var(--display); font-size: 1.75rem; line-height: 1; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}