/* Light only, by design. Nerdio brand palette: white and navy carry the page, Nerdio
   Blue marks everything interactive, Green Galaxy is kept to small highlights.
   --teal-ink is Nerdio Blue darkened until white text on it (and it on white)
   passes WCAG AA; the brand blue itself is used only for non-text marks. */
:root {
  --paper: #ffffff; --ink: #042838; --slate: #566a73;
  --blue: #1e9db8; --teal-ink: #11728a; --teal-ink-hover: #0f6b80;
  --tint: #eef8fa; --tint-strong: #d9eff4; --green: #cdff4e;
  --line: #dce4e8; --line-strong: #b9c6cc;
  --error: #a4262c; --error-bg: #fdf3f4;
}
* { box-sizing: border-box; }
html { background: var(--paper); }
body { margin: 0; font-family: 'Poppins', system-ui, -apple-system, 'Segoe UI', sans-serif;
       font-size: 1rem; line-height: 1.55; color: var(--ink); background: var(--paper);
       -webkit-font-smoothing: antialiased; }
.wrap { max-width: 768px; margin: 0 auto; padding: 0 1.5rem; }
header { border-top: 4px solid var(--blue); padding: 1.375rem 0; }
.logo { display: block; height: 30px; width: auto; }
.hero { background: var(--tint); border-top: 1px solid var(--tint-strong); border-bottom: 1px solid var(--tint-strong);
        padding: 3rem 0 3.25rem; }
.eyebrow { margin: 0 0 0.875rem; font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
           letter-spacing: 0.25em; color: var(--teal-ink); }
h1 { font-size: 2.25rem; line-height: 1.15; letter-spacing: -0.02em; font-weight: 600; margin: 0 0 0.75rem; }
.lead { color: var(--slate); font-size: 1.0625rem; margin: 0; max-width: 35rem; }
.hero .lead { color: #3d545e; }
main { padding: 0 0 4rem; }
.step { padding-top: 2.75rem; }
.step + .step { border-top: 1px solid var(--line); margin-top: 2.75rem; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
legend { display: flex; align-items: center; gap: 0.75rem; padding: 0; font-size: 1.25rem;
         font-weight: 600; letter-spacing: -0.01em; }
.step-number { display: inline-flex; align-items: center; justify-content: center; width: 1.875rem;
               height: 1.875rem; border-radius: 50%; background: var(--green); color: var(--ink);
               font-size: 0.875rem; font-weight: 600; flex: none; }
.hint { color: var(--slate); font-size: 0.9375rem; margin: 0.5rem 0 1.5rem; }
.grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem 0.875rem; }
.field { grid-column: span 6; }
@media (min-width: 560px) { .field.third { grid-column: span 2; } }
label { display: block; font-size: 0.8125rem; font-weight: 500; color: var(--slate); margin-bottom: 0.375rem; }
input[type=text] { width: 100%; height: 2.875rem; font: inherit; color: var(--ink); background: var(--paper);
                   border: 1px solid var(--line-strong); border-radius: 8px; padding: 0 0.875rem;
                   transition: border-color 120ms ease, box-shadow 120ms ease; }
input[type=text]:hover { border-color: var(--blue); }
input[type=text]:focus-visible { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(30, 157, 184, 0.25); }
.options { display: grid; gap: 1rem; }
.option { position: relative; display: block; cursor: pointer; margin: 0; color: var(--ink); }
.option input { position: absolute; opacity: 0; }
.option-body { position: relative; display: grid; grid-template-columns: 1fr; background: var(--paper);
               border: 1px solid var(--line-strong); border-radius: 12px; overflow: hidden;
               transition: border-color 120ms ease, box-shadow 120ms ease; }
@media (min-width: 640px) { .option-body { grid-template-columns: 260px 1fr; } }
.option:hover .option-body { border-color: var(--blue); }
.option input:checked + .option-body { border-color: var(--blue); box-shadow: 0 0 0 1px var(--blue), 0 8px 24px rgba(30, 157, 184, 0.16); }
.option input:focus-visible + .option-body { outline: 3px solid rgba(30, 157, 184, 0.45); outline-offset: 2px; }
.option-art-panel { display: flex; align-items: flex-start; justify-content: center; background: var(--tint);
                    padding: 1rem; transition: background 120ms ease; }
.option input:checked + .option-body .option-art-panel { background: var(--tint-strong); }
.option-art { width: 100%; max-width: 260px; height: auto; display: block; }
.option-text { display: block; padding: 1.125rem 1.25rem; }
/* Beside the photo the mark sits in the text column, so leave room for it there. */
@media (min-width: 640px) { .option-text { padding-right: 3.5rem; } }
.option-name { display: block; font-weight: 600; font-size: 1.0625rem; letter-spacing: -0.01em; }
.option-specs { display: block; color: var(--slate); font-size: 0.9375rem; margin-top: 0.375rem; }
.option-highlights { list-style: none; margin: 0.875rem 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.375rem; }
.option-highlights li { font-size: 0.8125rem; background: var(--tint); border: 1px solid var(--tint-strong);
                        border-radius: 999px; padding: 0.125rem 0.625rem; }
.option-details { margin-top: 0.875rem; font-size: 0.875rem; }
.option-details summary { display: inline-block; cursor: pointer; color: var(--teal-ink); font-weight: 500;
                          border-radius: 4px; }
.option-details summary::-webkit-details-marker { display: none; }
.option-details summary::after { content: ' +'; }
.option-details[open] summary::after { content: ' \2212'; }
.option-details summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.option-details dl { display: grid; grid-template-columns: 7rem 1fr; gap: 0.375rem 0.875rem; margin: 0.75rem 0 0;
                     padding-top: 0.75rem; border-top: 1px solid var(--line); cursor: default; }
.option-details dt { color: var(--slate); }
.option-details dd { margin: 0; }
.option-mark { position: absolute; top: 1.125rem; right: 1.125rem; width: 1.5rem; height: 1.5rem;
               border: 1.5px solid var(--line-strong); border-radius: 50%; background: var(--paper);
               display: flex; align-items: center; justify-content: center; color: var(--paper);
               font-size: 0.8125rem; font-weight: 700; line-height: 1; }
.option input:checked + .option-body .option-mark { background: var(--teal-ink); border-color: var(--teal-ink); }
.actions { margin-top: 2.75rem; padding-top: 2rem; border-top: 1px solid var(--line);
           display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.actions.plain { border-top: 0; padding-top: 0; margin-top: 1.75rem; }
button { font: inherit; font-weight: 600; color: var(--paper); background: var(--teal-ink); border: 0;
         border-radius: 8px; height: 3rem; padding: 0 1.75rem; cursor: pointer;
         box-shadow: 0 6px 16px rgba(17, 114, 138, 0.22); transition: background 120ms ease; }
button:hover:not(:disabled) { background: var(--teal-ink-hover); }
button:focus-visible { outline: 3px solid rgba(30, 157, 184, 0.45); outline-offset: 2px; }
button:disabled { opacity: 0.55; cursor: default; box-shadow: none; }
.message { margin: 0; font-size: 0.9375rem; color: var(--slate); }
.message.error { color: var(--error); background: var(--error-bg); border: 1px solid #f1d2d5;
                 border-radius: 8px; padding: 0.625rem 0.875rem; }
.confirmed { display: inline-flex; align-items: center; justify-content: center; width: 3rem; height: 3rem;
             border-radius: 50%; background: var(--green); color: var(--ink); font-size: 1.375rem;
             font-weight: 600; margin-bottom: 1.5rem; }
.summary { margin: 2.75rem 0 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.summary div { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: 1rem 1.25rem; }
.summary div + div { border-top: 1px solid var(--line); }
.summary dt { color: var(--slate); font-size: 0.9375rem; }
.summary dd { margin: 0; font-weight: 500; }
footer { border-top: 1px solid var(--line); padding: 1.5rem 0 2.5rem; color: var(--slate); font-size: 0.875rem; }
[hidden] { display: none !important; }
@media (max-width: 480px) {
  h1 { font-size: 1.75rem; }
  .hero { padding: 2.25rem 0 2.5rem; }
  .summary div { grid-template-columns: 1fr; gap: 0.125rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }