:root {
  --teal-deep: #0E4F4C;
  --teal: #15706B;
  --teal-soft: #E3EFEC;
  --paper: #F5F8F7;
  --ink: #142625;
  --muted: #536564;
  --line: #D3E0DC;
  --marigold: #D9A13B;
  --error: #A8322D;
  --ok: #1E6B3A;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Hind Siliguri", system-ui, sans-serif;
  font-size: 17px; line-height: 1.55;
  color: var(--ink); background: var(--paper);
}
.site-header { background: var(--teal-deep); color: #F2F7F6; }
.site-header .inner { max-width: 860px; margin: 0 auto; padding: 18px 20px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.brand { font-family: Sora, sans-serif; font-weight: 700; font-size: 20px; color: #F2F7F6; text-decoration: none; }
.brand span { color: var(--marigold); }
.header-link { color: #F2F7F6; font: inherit; font-size: 15px; background: none; border: 1px solid rgba(242,247,246,.4); padding: 6px 14px; border-radius: 6px; cursor: pointer; text-decoration: none; }
.header-link:hover { border-color: #F2F7F6; }

.page { max-width: 640px; margin: 0 auto; padding: 48px 20px 80px; }
.page.narrow { max-width: 440px; }
h1 { font-family: Sora, sans-serif; font-size: 32px; line-height: 1.15; color: var(--teal-deep); }
.lead { color: var(--muted); margin-top: 8px; }

form { margin-top: 32px; display: flex; flex-direction: column; gap: 22px; }
fieldset { border: 0; display: flex; flex-direction: column; gap: 22px; }
legend { font-family: Sora, sans-serif; font-weight: 600; font-size: 17px; color: var(--teal); padding-bottom: 8px; border-bottom: 2px solid var(--teal-soft); width: 100%; margin-bottom: 4px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label { font-weight: 600; font-size: 16px; }
.optional { font-weight: 400; color: var(--muted); }
.hint { font-size: 15px; color: var(--muted); }
input, select, textarea {
  font: inherit; color: var(--ink); background: #fff;
  border: 1px solid #B9CBC6; border-radius: 8px; padding: 11px 14px; width: 100%;
}
textarea { min-height: 96px; resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible {
  outline: 3px solid var(--marigold); outline-offset: 2px;
}
input[readonly] { background: var(--teal-soft); color: var(--muted); }
.code-input { font-size: 26px; letter-spacing: 8px; text-align: center; font-weight: 600; }

.btn { font: inherit; font-weight: 600; font-size: 17px; background: var(--teal); color: #fff; border: 0; border-radius: 8px; padding: 13px 20px; cursor: pointer; }
.btn:hover { background: var(--teal-deep); }
.btn:disabled { opacity: .6; cursor: wait; }
.link-btn { font: inherit; font-size: 15px; background: none; border: 0; color: var(--teal); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; padding: 0; }
.link-btn:disabled { color: var(--muted); text-decoration: none; cursor: default; }
.actions { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }

.msg { padding: 12px 14px; border-radius: 8px; font-size: 16px; }
.msg.error { background: #F8E7E6; color: var(--error); }
.msg.ok { background: #E4F2E8; color: var(--ok); }
[hidden] { display: none !important; }

@media (max-width: 560px) {
  h1 { font-size: 27px; }
  .row { grid-template-columns: 1fr; }
}