:root {
  color-scheme: light;
  --paper: #f9f6f2;
  --card: #ffffff;
  --ink: #231826;
  --secondary: #5b515e;
  --muted: #776e79;
  --plum: #8d4e9f;
  --action: #67237a;
  --action-hover: #5a1c6b;
  --line: rgba(35, 24, 38, .13);
  --error: #b13b38;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Inter, "Noto Sans Thai", Thonburi, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 16px; line-height: 1.7; }
a { color: var(--action); text-underline-offset: 4px; }
a:hover { color: var(--action-hover); }
button, input, textarea { font: inherit; }
button, a, input, textarea { -webkit-tap-highlight-color: transparent; }
:is(a, button, input, textarea):focus-visible { outline: 2px solid var(--plum); outline-offset: 4px; }
.visually-hidden, .website-field { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: absolute; top: 12px; left: 20px; z-index: 2; padding: 10px 16px; background: var(--card); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.page-header { max-width: 1160px; margin: 0 auto; padding: 28px 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; gap: 11px; align-items: center; color: var(--ink); text-decoration: none; font-size: .95rem; font-weight: 700; letter-spacing: .04em; }
.brand img { display: block; flex-shrink: 0; }
.back-link { min-height: 44px; display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-size: .85rem; color: var(--secondary); }
.back-link:hover { text-decoration: underline; }
.booking-layout { max-width: 1160px; margin: 0 auto; padding: 44px 40px 72px; display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 64px; align-items: start; }
.introduction { padding-top: 36px; }
.eyebrow { margin: 0 0 18px; color: var(--plum); font-size: .85rem; font-weight: 600; }
h1 { margin: 0; font-size: clamp(2rem, 1.4rem + 1.8vw, 3rem); line-height: 1.4; letter-spacing: -.02em; font-weight: 700; }
h1 span { color: var(--plum); }
.intro-copy { margin: 24px 0 0; color: var(--secondary); font-size: 1rem; line-height: 1.9; }
.intro-note { display: flex; gap: 18px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--secondary); font-size: .9rem; }
.intro-note p { margin: 0; }
.note-mark { color: var(--plum); font-size: 1.5rem; }
.form-card { border: 1px solid var(--line); border-radius: 20px; background: var(--card); padding: 36px; }
h2 { font-size: 1.4rem; line-height: 1.5; margin: 0; font-weight: 600; }
.form-intro { margin: 8px 0 28px; color: var(--secondary); font-size: .9rem; }
fieldset { padding: 0; margin: 0; border: 0; min-width: 0; }
.field { margin-bottom: 24px; }
.field label { display: block; margin-bottom: 8px; font-size: .9rem; font-weight: 600; }
.required-note, .optional-note { margin-left: 8px; color: var(--muted); font-size: .75rem; font-weight: 400; }
.field input, .field textarea { width: 100%; min-width: 0; padding: 11px 13px; background: var(--paper); color: var(--ink); border: 1px solid var(--line); border-radius: 10px; transition: border-color .2s ease, background-color .2s ease; }
.field input { min-height: 48px; }
.field textarea { display: block; resize: vertical; min-height: 112px; }
.field input:hover, .field textarea:hover { border-color: var(--muted); }
.field input:focus, .field textarea:focus { background: var(--card); border-color: var(--plum); }
.field [aria-invalid="true"] { border-color: var(--error); }
.field input::placeholder, .field textarea::placeholder { color: var(--muted); opacity: 1; }
.field-hint, .field-error, .consent-help { margin: 7px 0 0; font-size: .8rem; line-height: 1.7; }
.field-hint, .consent-help { color: var(--secondary); }
.field-error { color: var(--error); }
.privacy-note { padding-top: 22px; margin: 4px 0 22px; border-top: 1px solid var(--line); color: var(--secondary); font-size: .8rem; overflow-wrap: anywhere; }
.privacy-note p { margin: 0 0 8px; }
.consent-row { display: flex; align-items: flex-start; gap: 12px; padding: 5px 0; font-size: .85rem; font-weight: 500; cursor: pointer; }
.consent-row input { flex: 0 0 20px; width: 20px; height: 20px; margin: 4px 0 0; accent-color: var(--action); cursor: pointer; }
.consent-help { padding-left: 32px; font-size: .75rem; }
.submit-button, .return-button { display: flex; justify-content: center; align-items: center; gap: 12px; width: 100%; min-height: 50px; margin-top: 24px; padding: 12px 20px; border: 1px solid transparent; border-radius: 10px; background: var(--action); color: #fff; font-size: .9rem; font-weight: 600; cursor: pointer; text-decoration: none; transition: background-color .2s ease; }
.submit-button:hover:not(:disabled), .return-button:hover { background: var(--action-hover); color: #fff; }
.submit-button:disabled { color: var(--secondary); background: #e9e4ea; cursor: not-allowed; }
fieldset:disabled { opacity: .75; }
.form-error { padding: 12px 14px; margin: 20px 0 0; color: var(--error); border: 1px solid var(--error); border-radius: 10px; font-size: .85rem; }
.submission-status { margin: 12px 0 0; color: var(--secondary); font-size: .8rem; text-align: center; }
.submission-status:empty { display: none; }
.success-panel { padding: 12px 0; }
.success-mark { display: grid; place-items: center; width: 48px; height: 48px; margin-bottom: 24px; border: 1px solid var(--plum); border-radius: 50%; color: var(--plum); font-size: 1.5rem; }
.success-panel h2 { font-size: 1.5rem; line-height: 1.6; }
.success-panel > p:not(.eyebrow) { margin-top: 20px; color: var(--secondary); font-size: .95rem; }
.page-footer { max-width: 1080px; margin: 0 auto; padding: 24px 0 32px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 20px; color: var(--muted); font-size: .75rem; }

@media (max-width: 900px) {
  .booking-layout { gap: 32px; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); padding-top: 24px; }
  .form-card { padding: 28px; }
  .desktop-break { display: none; }
  .page-footer { margin-left: 40px; margin-right: 40px; }
}
@media (max-width: 680px) {
  .page-header { padding: 20px 24px; gap: 12px; }
  .brand { font-size: .85rem; gap: 8px; }
  .brand img { width: 30px; height: 30px; }
  .back-link { font-size: .8rem; }
  .booking-layout { grid-template-columns: minmax(0, 1fr); gap: 28px; padding: 20px 24px 40px; }
  .introduction { padding-top: 0; }
  .eyebrow { margin-bottom: 12px; }
  h1 { font-size: clamp(2rem, 1.6rem + 2vw, 2.5rem); }
  .intro-copy { margin-top: 16px; }
  .intro-note { margin-top: 24px; padding-top: 16px; }
  .intro-note br { display: none; }
  .form-card { padding: 26px 22px; border-radius: 16px; }
  .page-footer { margin: 0 24px; padding-top: 20px; flex-wrap: wrap; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; } }