/* ============================================================
   Event Registration Form — Fluent UI inspired styles
   ============================================================ */

/* The hidden attribute must always win over element display rules (e.g. .btn). */
[hidden] { display: none !important; }

/* ---- Design tokens (Fluent UI Web palette) ---- */
:root {
  --color-brand: #0f6cbd;          /* Fluent communication blue */
  --color-brand-hover: #115ea3;
  --color-brand-pressed: #0c3b5e;
  --color-brand-tint: #ebf3fc;

  --color-neutral-bg: #faf9f8;
  --color-surface: #ffffff;
  --color-border: #d1d1d1;
  --color-border-strong: #8a8886;
  --color-text: #242424;
  --color-text-secondary: #616161;
  --color-danger: #b10e1c;
  --color-danger-tint: #fdf3f4;

  --radius: 6px;
  --radius-lg: 8px;
  --shadow-16: 0 8px 16px rgba(0,0,0,.14), 0 0 2px rgba(0,0,0,.12);
  --shadow-4: 0 2px 4px rgba(0,0,0,.10), 0 0 2px rgba(0,0,0,.08);

  --font: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-neutral-bg);
  line-height: 1.4;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

/* ---- Layout ---- */
.page {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
}

.form-header { margin-bottom: var(--space-5); }
.form-header h1 {
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 var(--space-2);
}
.form-header p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 15px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-4);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}

.card__title {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 var(--space-1);
}
.card__hint {
  margin: 0 0 var(--space-4);
  color: var(--color-text-secondary);
  font-size: 13px;
}

/* ---- Fields ---- */
.field { margin-bottom: var(--space-4); }
.field:last-child { margin-bottom: 0; }

.field__label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: var(--space-1);
}
.field__label .req { color: var(--color-danger); margin-left: 2px; }

.field__hint {
  margin: var(--space-1) 0 0;
  font-size: 12px;
  color: var(--color-text-secondary);
}
.field__hint--error { color: var(--color-danger); }

.input-row {
  display: flex;
  gap: var(--space-2);
}
.input-row .input { flex: 1; width: auto; }

.input,
.textarea {
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  padding: 8px 10px;
  transition: border-color .1s ease, box-shadow .1s ease;
}
.textarea { min-height: 84px; resize: vertical; }

.input:hover, .textarea:hover { border-color: var(--color-text-secondary); }

.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--color-brand);
  box-shadow: 0 0 0 1px var(--color-brand);
}

.input[readonly] {
  background: var(--color-neutral-bg);
  color: var(--color-text-secondary);
  cursor: default;
}
.input[readonly]:focus { box-shadow: none; border-color: var(--color-border-strong); }

/* Native select styled to match inputs, with a Fluent-style chevron */
.select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 32px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23616161' d='M1.4 1.6 6 6.2l4.6-4.6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

/* Links */
a { color: var(--color-brand); }
a:hover { color: var(--color-brand-hover); }

/* Radio rows (consent) */
.radio-row { display: flex; gap: var(--space-5); }
.radio {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: 14px;
}
.radio input { accent-color: var(--color-brand); width: 16px; height: 16px; }
.checkbox-row {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}
.checkbox-row input {
  accent-color: var(--color-brand);
  width: 16px;
  height: 16px;
}
.card__title .req { color: var(--color-danger); margin-left: 2px; }

/* Two-column grid on wider screens */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

/* ---- Section header with action ---- */
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}
.section-head .card__title { margin: 0; }

.summary-details {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.summary-item {
  display: flex;
  justify-content: space-between;
  color: var(--color-text-secondary);
  font-size: 14px;
}
.summary-subtext {
  color: var(--color-text-secondary);
  font-size: 12px;
  margin-left: var(--space-2);
}
.summary-note {
  color: var(--color-text-secondary);
  font-size: 13px;
  margin: 0;
}

.summary-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.attendee-collapse {
  margin-top: var(--space-3);
  text-align: center;
}

.attendee-collapse .btn {
  padding: 8px 12px;
}

/* ---- Attendees ---- */
.attendee {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  background: var(--color-neutral-bg);
}
.attendee__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}
.attendee__title { font-weight: 600; font-size: 14px; }

/* ---- Buttons ---- */
.btn {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  padding: 8px 16px;
  cursor: pointer;
  transition: background .1s ease, border-color .1s ease, color .1s ease;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid transparent;
}
.btn:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-brand);
  color: #fff;
}
.btn--primary:hover { background: var(--color-brand-hover); }
.btn--primary:active { background: var(--color-brand-pressed); }

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.btn--secondary:hover { background: #f3f2f1; }

.btn--subtle {
  background: transparent;
  color: var(--color-brand);
  padding: 6px 8px;
}
.btn--subtle:hover { background: var(--color-brand-tint); }

.btn--danger {
  background: transparent;
  color: var(--color-danger);
  padding: 6px 8px;
}
.btn--danger:hover { background: var(--color-danger-tint); }

.btn--block { width: 100%; justify-content: center; padding: 12px 16px; font-size: 15px; }

.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ---- Payment toggle (segmented control) ---- */
.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
.segmented__option {
  position: relative;
  display: block;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  padding: var(--space-4);
  cursor: pointer;
  transition: border-color .1s ease, background .1s ease, box-shadow .1s ease;
}
.segmented__option:hover { border-color: var(--color-brand); }
.segmented__option input { position: absolute; opacity: 0; pointer-events: none; }

.segmented__option:has(input:disabled) {
  cursor: not-allowed;
  opacity: 0.5;
  background: var(--color-neutral-bg);
}
.segmented__option:has(input:disabled):hover { border-color: var(--color-border-strong); }

.segmented__option-title { font-weight: 600; display: block; }
.segmented__option-desc {
  display: block;
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.segmented__option:has(input:checked) {
  border-color: var(--color-brand);
  background: var(--color-brand-tint);
  box-shadow: 0 0 0 1px var(--color-brand);
}
.segmented__option:has(input:focus-visible) {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}

/* ---- Footer / submit ---- */
.form-footer { margin-top: var(--space-2); }

/* ---- Submit overlay - blocks editing the form while a submission is in flight ---- */
.submit-overlay {
  position: fixed;
  inset: 0;
  background: rgba(36, 36, 36, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.submit-overlay__box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-16);
  padding: var(--space-5) var(--space-6);
  text-align: center;
  color: var(--color-text);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-brand);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---- Page footer (merchant/contact info required by the payment gateway) ---- */
.page-footer {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}
.page-footer p { margin: 0 0 var(--space-1); }
.page-footer p:last-child { margin-bottom: 0; }
.page-footer a { color: var(--color-text-secondary); }

.page-footer__logos {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.page-footer__logos img { display: block; }

/* ---- Responsive ---- */
@media (max-width: 560px) {
  .grid-2 { grid-template-columns: 1fr; gap: var(--space-3); }
  .segmented { grid-template-columns: 1fr; }
  .form-header h1 { font-size: 24px; }
  .card { padding: var(--space-4); }
  .page { padding: var(--space-5) var(--space-3); }
}