:root {
  --bg-a: #eef4fb;
  --bg-b: #eef6e6;
  --ink: #1e2a2f;
  --muted: #5c6b72;
  --card: #ffffff;
  --line: #b9cbdd;
  --accent: #165c9b;
  --accent-2: #5667ff80;
  --danger: #9d2b2b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 10%, #f4f9ff 0%, transparent 40%),
    linear-gradient(135deg, var(--bg-a), var(--bg-b));
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: white;
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  width: min(980px, 92vw);
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
}

.brand-logo {
  height: 36px;
  width: auto;
  display: block;
}

.brand-text {
  letter-spacing: 0.01em;
}

.topnav {
  display: inline-flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.topnav a {
  text-decoration: none;
  color: var(--ink);
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  font-size: 0.92rem;
}

.topnav a:hover,
.topnav a:focus-visible {
  background: color-mix(in srgb, var(--accent) 12%, #fff);
  color: var(--accent);
  outline: none;
}

.page {
  width: min(980px, 92vw);
  margin: 3rem auto;
  padding: 2rem;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 45px rgba(16, 30, 38, 0.12);
}

h1 {
  margin-top: 0;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
}

.lead {
  margin-top: 0.4rem;
  color: var(--muted);
}

.hint {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin: 1.5rem 0;
  padding: 1rem;
  background: #fff;
}

legend {
  padding: 0 0.5rem;
  font-weight: 700;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

label {
  display: block;
  font-size: 0.92rem;
  margin-bottom: 0.3rem;
}

input {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border-radius: 9px;
  border: 1px solid var(--line);
  font: inherit;
}

select {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border-radius: 9px;
  border: 1px solid var(--line);
  font: inherit;
  background: #fff;
}

input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, #fff);
  border-color: var(--accent);
}

select:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, #fff);
  border-color: var(--accent);
}

.voucher-row {
  display: grid;
  grid-template-columns: minmax(220px, 1.5fr) minmax(170px, 1fr) minmax(
      120px,
      0.65fr
    ) auto;
  gap: 0.7rem;
  align-items: end;
  margin-bottom: 0.7rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent-2) 8%, #fff);
}

.voucher-row-title {
  grid-column: 1 / -1;
  font-weight: 700;
  color: var(--accent);
}

.voucher-remove-wrap {
  padding-bottom: 0.05rem;
}

.actions {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  margin-top: 1.4rem;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.72rem 1rem;
  font: inherit;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: color-mix(in srgb, var(--accent) 86%, #000);
}

.btn-secondary {
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: color-mix(in srgb, var(--accent-2) 30%, #fff);
}

.message,
.error-list {
  border-radius: 10px;
  padding: 0.85rem 1rem;
}

.message {
  margin-bottom: 1rem;
  background: color-mix(in srgb, var(--accent-2) 18%, #fff);
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, #fff);
}

.error-list {
  margin-bottom: 1rem;
  background: #ffecec;
  border: 1px solid #efb5b5;
  color: var(--danger);
}

.error-list ul {
  margin: 0;
  padding-left: 1.2rem;
}

.hp-field {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

@media (max-width: 760px) {
  .topbar-inner {
    min-height: auto;
    padding: 0.65rem 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .page {
    margin: 1rem auto;
    padding: 1rem;
  }

  .grid,
  .voucher-row {
    grid-template-columns: 1fr;
  }

  .actions {
    flex-direction: column;
    align-items: stretch;
  }
}