:root {
  --navy: #0b2341;
  --navy-soft: #15385f;
  --orange: #f58220;
  --white: #ffffff;
  --ink: #162033;
  --muted: #667085;
  --surface: #f3f6fa;
  --line: #d8e0ea;
  --success: #147a4b;
  --danger: #b42318;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 10%, rgba(245, 130, 32, .15), transparent 28rem),
    linear-gradient(145deg, #06172d 0%, #0b2341 42%, #123861 100%);
}

button, input { font: inherit; }

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 18px;
}

.card {
  width: min(100%, 760px);
  background: rgba(255, 255, 255, .98);
  border-radius: 26px;
  padding: clamp(28px, 6vw, 54px);
  box-shadow: 0 28px 80px rgba(0, 0, 0, .28);
  text-align: center;
}

.compact-card { width: min(100%, 560px); }

.brand-logo {
  width: 92px;
  height: 92px;
  object-fit: contain;
  border-radius: 50%;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--orange);
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: .78rem;
}

h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(2rem, 6vw, 3.2rem);
  line-height: 1.05;
  letter-spacing: -.045em;
}

.compact-card h1 { font-size: clamp(1.8rem, 5vw, 2.5rem); }

.lead {
  max-width: 620px;
  margin: 20px auto 28px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.certificate-form {
  display: grid;
  gap: 10px;
  max-width: 580px;
  margin: 0 auto;
  text-align: left;
}

label { font-weight: 750; color: var(--navy); }

input {
  width: 100%;
  min-height: 58px;
  padding: 0 18px;
  border: 2px solid var(--line);
  border-radius: 14px;
  color: var(--ink);
  background: var(--white);
  font-size: 1rem;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}

input:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(245, 130, 32, .13);
}

button {
  min-height: 58px;
  border: 0;
  border-radius: 14px;
  padding: 0 22px;
  color: var(--white);
  background: var(--orange);
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(245, 130, 32, .25);
  transition: transform .15s, filter .15s;
}

button:hover { transform: translateY(-1px); filter: brightness(.97); }
button:disabled { opacity: .65; cursor: wait; transform: none; }

.form-error { color: var(--danger); margin: 0 0 4px; font-size: .92rem; }

.result { margin-top: 28px; }

.success-badge {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--success);
  background: #eaf8f0;
  font-weight: 800;
  font-size: .86rem;
  margin-bottom: 16px;
}

#certificate-preview {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 14px 30px rgba(11, 35, 65, .12);
  margin-bottom: 18px;
}

.download-button { width: 100%; background: var(--navy); box-shadow: 0 12px 24px rgba(11, 35, 65, .22); }
.text-button { width: 100%; margin-top: 8px; color: var(--navy); background: transparent; box-shadow: none; min-height: 44px; }

.event-note {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 30px;
  padding: 18px;
  color: var(--navy);
  background: var(--surface);
  border-radius: 14px;
}

.event-note span { color: var(--muted); font-size: .88rem; }
.validation-link, .admin-links a, .logout-link { display: inline-block; color: var(--navy-soft); font-weight: 750; margin-top: 20px; }

.admin-topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; text-align: left; }
.admin-topbar h1 { font-size: clamp(1.8rem, 5vw, 2.7rem); }
.logout-link { margin: 0; white-space: nowrap; }
.admin-links { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; }

.validation-result {
  display: grid;
  gap: 8px;
  margin: 28px 0 12px;
  padding: 22px;
  border-radius: 16px;
  text-align: left;
}
.validation-result strong { font-size: 1.25rem; }
.validation-result span { color: #344054; line-height: 1.45; }
.validation-result.is-valid { background: #eaf8f0; border: 1px solid #abefc6; }
.validation-result.is-valid strong { color: var(--success); }
.validation-result.is-invalid { background: #fff0ee; border: 1px solid #fecdca; }
.validation-result.is-invalid strong { color: var(--danger); }

@media (max-width: 620px) {
  .page-shell { padding: 18px 12px; align-items: start; }
  .card { border-radius: 20px; padding: 28px 20px; }
  .admin-topbar { flex-direction: column; gap: 10px; }
  .brand-logo { width: 78px; height: 78px; }
}

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