/* University of Bahrain colours, taken from the logo */
:root {
  --blue: #003f93;
  --blue-dark: #002c68;
  --gold: #c89d63;
  --gold-light: #f6efe4;
  --red: #c8001a;
  --ink: #1d2433;
  --muted: #5b6475;
  --line: #dde2ea;
  --bg: #f3f5f9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

.page { max-width: 680px; margin: 0 auto; padding: 24px 16px 48px; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}

/* header card */
.hero { border-top: 6px solid var(--blue); text-align: center; }
.logo { display: block; margin: 0 auto 12px; width: 96px; height: auto; }
.dept { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
h1 { margin: 0 0 12px; color: var(--blue); font-size: 26px; line-height: 1.25; }
.invite { margin: 0 0 18px; }
.details {
  margin: 0 0 16px;
  display: grid;
  gap: 8px;
  text-align: left;
  background: var(--gold-light);
  border-left: 4px solid var(--gold);
  border-radius: 8px;
  padding: 14px 16px;
}
.details div { display: grid; grid-template-columns: 64px 1fr; gap: 8px; }
.details dt { font-weight: 600; color: var(--blue); }
.details dd { margin: 0; }
.deadline { margin: 0; font-size: 15px; }

/* form */
.note { margin: 0 0 16px; color: var(--muted); font-size: 14px; }
.req { color: var(--red); }
.field { display: block; margin: 0 0 18px; font-weight: 600; }
.field input:not([type="radio"]) {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  font-weight: 400;
}
.field input:focus { outline: 2px solid var(--blue); outline-offset: 1px; border-color: var(--blue); }
fieldset.field { border: 0; padding: 0; }
legend { padding: 0; margin-bottom: 8px; }
.choice {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 400;
  cursor: pointer;
}
.choice:has(input:checked) { border-color: var(--blue); background: #eef3fb; }
.choice input { width: 18px; height: 18px; margin: 0; accent-color: var(--blue); }
.trap { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.error {
  margin: 0 0 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #fdecee;
  color: var(--red);
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border: 0;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--blue-dark); }
.btn:disabled { opacity: .6; cursor: default; }
.btn.light { background: #fff; color: var(--blue); border: 1px solid var(--line); }
.btn.light:hover { background: #eef3fb; }

.thanks { border-top: 6px solid var(--gold); text-align: center; }
.thanks h2 { margin: 0 0 8px; color: var(--blue); }
.thanks p { margin: 0; }

@media (max-width: 480px) {
  .card { padding: 18px; }
  h1 { font-size: 22px; }
  .btn { width: 100%; }
}