:root {
  /* Sandbox Studio-inspired palette: deep navy + orange accent */
  --navy: #0d1b2a;
  --navy-700: #16293d;
  --navy-500: #243b53;
  --orange: #ff9900;        /* AWS / SBS accent */
  --orange-600: #e07c00;
  --ink: #1a2330;
  --body: #35414f;
  --muted: #5a6b7b;
  --line: #d4dce4;
  --line-strong: #b7c3cf;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --error: #b3261e;
  --error-bg: #fdecea;
  --success: #0f7b3f;
  --success-bg: #e8f6ee;
  --focus: #2563eb;
  --radius: 10px;
  --maxw: 760px;
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--body);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
  left: 0;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--navy);
  color: #fff;
}
.site-header__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
/* AWS is the lead brand on the left. White wordmark on transparent
   background, so it sits directly on the dark header (no chip). */
.aws-logo {
  display: block;
  height: 52px;
  width: auto;
}
.partner {
  display: flex;
  align-items: center;
  gap: 12px;
}
.partner__with {
  font-size: 13px;
  color: #b9c6d6;
  white-space: nowrap;
}
/* Sandbox Studio wordmark on the right (PNG now cropped tight).
   Nudged up slightly to visually align with the "in partnership with" text. */
.brand__logo {
  display: block;
  height: 36px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  margin-top: -4px;
}

@media (max-width: 560px) {
  .aws-logo { height: 40px; }
  .brand__logo { height: 28px; max-width: 170px; }
}
.site-header__accent {
  height: 5px;
  background: linear-gradient(90deg, var(--orange) 0%, var(--orange-600) 100%);
}

/* ---------- Page / panels ---------- */
.page {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 28px 20px 64px;
}
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
}
.panel--success {
  border-left: 6px solid var(--success);
  background: var(--success-bg);
}
.panel--notice {
  border-left: 6px solid var(--orange);
}
.panel h1 { margin-top: 0; }

/* ---------- Intro ---------- */
.intro {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 5px solid var(--orange);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
}
.intro h1 {
  margin: 0 0 14px;
  font-size: 28px;
  line-height: 1.25;
  color: var(--navy);
}
.intro p { margin: 0 0 12px; color: var(--body); }
.rules {
  margin-top: 18px;
  background: #fff7e8;
  border: 1px solid #f3d9a6;
  border-left: 5px solid var(--orange);
  border-radius: 8px;
  padding: 14px 16px;
}
.rules p { margin: 0; color: var(--ink); font-size: 15.5px; }

/* ---------- Form sections ---------- */
form { margin: 0; }
.section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 22px 24px 8px;
  margin: 0 0 22px;
}
.section__legend {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  padding: 0 8px;
  margin-left: -8px;
}

/* ---------- Fields ---------- */
.field { margin-bottom: 20px; }
.field__label {
  display: block;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}
.field__help {
  margin: 0 0 8px;
  font-size: 14.5px;
  color: var(--muted);
}
.optional {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.9em;
}
.req { color: var(--error); margin-left: 2px; }

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  padding: 11px 12px;
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1.5px solid var(--line-strong);
  border-radius: 8px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
textarea { resize: vertical; }
select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23243b53' stroke-width='2'%3e%3cpath d='M6 9l6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 18px;
  padding-right: 40px;
}

input:hover,
select:hover,
textarea:hover { border-color: var(--navy-500); }

/* Visible, high-contrast focus for keyboard users (WCAG 2.4.7 / 2.4.11) */
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-color: var(--focus);
  box-shadow: 0 0 0 1px var(--focus);
}

/* ---------- Radio groups ---------- */
.radio-group {
  border: 0;
  margin: 0;
  padding: 0;
}
.radio-group .field__label { margin-bottom: 10px; }
.radio {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  margin-bottom: 8px;
  cursor: pointer;
  background: #fff;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.radio:hover { border-color: var(--navy-500); background: #fafbfc; }
.radio input {
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  accent-color: var(--orange-600);
  flex: 0 0 auto;
}
.radio input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
.radio:has(input:checked) {
  border-color: var(--orange-600);
  background: #fff7e8;
}

/* ---------- Errors ---------- */
.field__error {
  margin: 6px 0 0;
  color: var(--error);
  font-size: 14.5px;
  font-weight: 600;
  min-height: 0;
}
.field__error:empty { display: none; }

.field--invalid input,
.field--invalid select,
.field--invalid textarea {
  border-color: var(--error);
  box-shadow: 0 0 0 1px var(--error);
}
.field--invalid .field__label { color: var(--error); }

.error-summary {
  background: var(--error-bg);
  border: 1.5px solid var(--error);
  border-left: 6px solid var(--error);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 24px;
}
.error-summary h2 {
  margin: 0 0 10px;
  color: var(--error);
  font-size: 19px;
}
.error-summary ul { margin: 0; padding-left: 20px; }
.error-summary li { margin-bottom: 6px; }
.error-summary a {
  color: var(--error);
  font-weight: 600;
}

/* ---------- Actions / button ---------- */
.actions { margin: 8px 0 4px; }
.btn {
  font: inherit;
  font-weight: 700;
  border: 0;
  border-radius: 8px;
  padding: 14px 32px;
  cursor: pointer;
}
.btn--primary {
  background: var(--orange);
  color: var(--navy);
}
.btn--primary:hover { background: var(--orange-600); color: #fff; }

/* ---------- Privacy ---------- */
.privacy {
  font-size: 14.5px;
  color: var(--muted);
  margin: 4px 0 18px;
}
.privacy a { color: var(--navy-500); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy);
  color: #c3cfdd;
  text-align: center;
  padding: 20px;
  font-size: 14px;
}
.site-footer p { margin: 0; }
.site-footer p + p { margin-top: 6px; }
.site-footer__link {
  color: #fff;
  text-decoration: underline;
}
.site-footer__link:hover { color: var(--orange); }

/* ---------- Utilities ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
[hidden] { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  body { font-size: 16px; }
  .intro h1 { font-size: 23px; }
  .site-header__inner { padding: 14px 16px; }
  .partner__with { display: none; }
  .panel, .intro, .section { padding: 18px; }
  .btn--primary { width: 100%; }
}

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