/* Year 3 Mental Maths Challenge — sign-up pages (index, thanks, privacy).
   Same look as the parent pages (system font, white cards on #f0f4f8), with the
   challenge's teal (World 4's card colour) as the accent. */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f0f4f8;
  color: #1a202c;
  line-height: 1.5;
  padding: 24px 16px 48px;
}

.wrap { max-width: 620px; margin: 0 auto; }

.logo { font-size: 1.3rem; font-weight: 700; text-align: center; color: #1a1a2e; margin-bottom: 18px; }
.logo span { color: #00819f; }
.logo img { display: inline-block; vertical-align: middle; }

.card { background: white; border-radius: 14px; padding: 28px; box-shadow: 0 1px 4px rgba(0,0,0,0.1); margin-bottom: 18px; }

.hero { border-top: 6px solid #00819f; }
.hero h1 { font-size: 1.55rem; color: #1a1a2e; margin-bottom: 6px; line-height: 1.25; }
.hero .dates { color: #00819f; font-weight: 700; margin-bottom: 14px; }
.hero ul { padding-left: 1.2em; margin: 10px 0 4px; }
.hero li { margin: 5px 0; }

h2 { font-size: 1.1rem; color: #1a1a2e; margin-bottom: 14px; }
p + p { margin-top: 10px; }

label.field { display: block; font-weight: 600; font-size: 0.92rem; color: #2d3748; margin: 18px 0 6px; }
label.field:first-of-type { margin-top: 0; }
.hint { font-weight: 400; font-size: 0.8rem; color: #718096; }

input[type=text], input[type=email], select {
  width: 100%; padding: 11px 13px; font-size: 1rem; border: 2px solid #e2e8f0;
  border-radius: 9px; background: white; color: #1a202c;
}
input:focus, select:focus { outline: none; border-color: #00819f; }

.check { display: flex; gap: 11px; align-items: flex-start; margin-top: 16px; font-size: 0.92rem; }
.check input { width: 20px; height: 20px; margin-top: 2px; flex-shrink: 0; accent-color: #00819f; }

.btn {
  display: block; width: 100%; margin-top: 24px; padding: 14px; font-size: 1.05rem; font-weight: 700;
  color: white; background: #00819f; border: none; border-radius: 10px; cursor: pointer;
}
.btn:hover { background: #006b84; }

.note { font-size: 0.82rem; color: #718096; margin-top: 14px; }
a { color: #00819f; }

.hidden-field { position: absolute; left: -9999px; }   /* spam honeypot */

.privacy h3 { font-size: 0.98rem; color: #1a1a2e; margin: 20px 0 6px; }
.privacy ul { padding-left: 1.2em; }
.privacy li { margin: 4px 0; }

/* Landing page */
.btn.cta { display: inline-block; width: auto; margin-top: 16px; padding: 13px 26px; text-decoration: none; }
ol.steps { padding-left: 1.3em; } ol.steps li { margin: 8px 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips span { background: #eef8fb; color: #00657d; border-radius: 16px; padding: 5px 12px; font-size: 0.86rem; font-weight: 600; }
.chips span.gate { background: #00819f; color: white; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.two-col ul { padding-left: 1.1em; } .two-col li { margin: 6px 0; font-size: 0.93rem; }
@media (max-width: 600px) { .two-col { grid-template-columns: 1fr; } }
details { border-top: 1px solid #edf2f7; padding: 10px 0; }
details:first-of-type { border-top: none; }
summary { cursor: pointer; font-weight: 700; color: #1a1a2e; }
details p { margin-top: 6px; color: #4a5568; }