@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=PT+Serif:wght@400&display=swap');

:root {
  color-scheme: light;
  --background: #f4f3ed;
  --surface: #ffffff;
  --text: #253b33;
  --muted: #65716a;
  --accent: #275947;
  --border: #e2e6df;
  --input-border: #b6c1b7;
  --selected: #f0f5ef;
  --error: #a32929;
  --serif: 'PT Serif', Georgia, serif;
  font-family: Inter, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
body { margin: 0; }
button, input { font: inherit; }
button { cursor: pointer; }
main { max-width: 1200px; margin: 0 auto; padding: 34px 48px 80px; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding-bottom: 30px; border-bottom: 1px solid var(--border); margin-bottom: 64px; }
.brand { display: inline-flex; align-items: baseline; gap: 3px; font-size: 22px; font-weight: 500; letter-spacing: -.055em; }
.brand-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.language-switch { display: flex; padding: 4px; border: 1px solid var(--border); border-radius: 24px; gap: 2px; }
.language-switch button { min-width: 44px; min-height: 36px; padding: 6px 12px; border: 0; border-radius: 20px; background: transparent; color: var(--muted); font-size: 12px; font-weight: 500; letter-spacing: .04em; }
.language-switch button[aria-pressed='true'] { background: var(--text); color: var(--surface); }
.questionnaire-layout { display: grid; grid-template-columns: minmax(0, .78fr) minmax(0, 1.5fr); align-items: start; gap: 64px; }
.introduction { position: sticky; top: 48px; padding-top: 22px; }
h1 { font-family: var(--serif); font-size: clamp(2.75rem, 4.2vw, 3.75rem); font-weight: 400; letter-spacing: -.045em; line-height: 1.08; margin: 0 0 28px; text-wrap: balance; }
.intro { max-width: 280px; margin: 0; font-size: .95rem; line-height: 1.8; color: var(--muted); }
.introduction::after { content: ''; display: block; width: 42px; height: 2px; margin-top: 32px; background: var(--input-border); }
.questionnaire-sheet { padding: 36px 36px 30px; background: var(--surface); border: 1px solid var(--border); border-radius: 18px; box-shadow: 0 8px 40px #253b3304; }
.name-field { margin-bottom: 36px; }
.preview-notice { margin: 0 0 28px; padding: 12px 14px; border: 1px solid var(--input-border); border-radius: 7px; background: var(--selected); font-size: .8125rem; line-height: 1.7; }
.name-field label { display: block; font-size: .875rem; font-weight: 500; margin-bottom: 10px; }
.name-field input { display: block; width: 100%; min-height: 50px; padding: 12px 14px; background: var(--surface); color: var(--text); border: 1px solid var(--input-border); border-radius: 7px; }
.name-field input:hover { border-color: var(--accent); }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
legend { font-size: 1.125rem; line-height: 1.5; font-weight: 500; padding: 0; letter-spacing: -.02em; }
.help { font-size: .8125rem; line-height: 1.65; color: var(--muted); margin: 10px 0 22px; }
#options { border-top: 1px solid var(--border); }
.option { position: relative; display: flex; align-items: flex-start; gap: 15px; padding: 20px 12px; margin: 0 -12px; border-bottom: 1px solid var(--border); cursor: pointer; border-radius: 7px; }
.option:hover { background: var(--background); }
.option:has(input:checked) { background: var(--selected); }
.option input { appearance: none; flex: 0 0 auto; width: 21px; height: 21px; position: relative; margin: 2px 0 0; border: 1.5px solid var(--input-border); border-radius: 5px; background: var(--surface); cursor: pointer; }
.option input:checked { background: var(--accent); border-color: var(--accent); }
.option input:checked::after { content: ''; position: absolute; left: 6px; top: 3px; width: 5px; height: 9px; border: solid white; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.option-content { min-width: 0; display: block; }
.option-title { display: block; font-size: .9375rem; line-height: 1.6; font-weight: 500; }
.option-description { display: block; margin-top: 5px; color: var(--muted); font-size: .8125rem; line-height: 1.8; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.submission { padding-top: 24px; }
.privacy { margin: 0 0 20px; font-size: .75rem; line-height: 1.8; color: var(--muted); }
.submit { display: block; width: 100%; min-height: 52px; padding: 13px 24px; border: 1px solid var(--accent); border-radius: 8px; background: var(--accent); color: var(--surface); font-size: .875rem; font-weight: 500; }
.submit:hover { filter: brightness(.9); }
.submit:disabled { cursor: wait; opacity: .7; }
#form-status { color: var(--error); margin: 16px 0 0; font-size: .8125rem; line-height: 1.7; }
#form-status:empty { display: none; }
#success { padding: 24px 0 36px; }
#success h2 { font-family: var(--serif); font-size: 2.5rem; line-height: 1.2; font-weight: 400; letter-spacing: -.03em; margin: 24px 0 12px; }
#success p { color: var(--muted); font-size: .9375rem; }
.success-mark { display: block; position: relative; width: 48px; height: 48px; border-radius: 50%; background: var(--selected); }
.success-mark::after { content: ''; position: absolute; left: 19px; top: 13px; width: 9px; height: 17px; border: solid var(--accent); border-width: 0 2px 2px 0; transform: rotate(45deg); }
[hidden] { display: none !important; }
@media (max-width: 900px) {
  main { padding: 26px 28px 56px; }
  .questionnaire-layout { gap: 36px; grid-template-columns: minmax(0, .7fr) minmax(0, 1.5fr); }
  .questionnaire-sheet { padding: 28px; }
  h1 { font-size: 2.75rem; }
}
@media (max-width: 680px) {
  main { padding: 20px 20px 40px; }
  .topbar { padding-bottom: 20px; margin-bottom: 32px; }
  .brand { font-size: 21px; }
  .questionnaire-layout { display: block; }
  .introduction { position: static; padding: 0 2px; margin-bottom: 28px; }
  h1 { max-width: 420px; margin-bottom: 16px; font-size: 2.75rem; }
  .intro { max-width: 350px; font-size: .875rem; line-height: 1.7; }
  .introduction::after { display: none; }
  .questionnaire-sheet { padding: 25px 20px 22px; border-radius: 14px; }
  .name-field { margin-bottom: 30px; }
  .option { gap: 12px; padding: 18px 9px; margin: 0 -9px; }
  .option-title { font-size: .875rem; }
  .option-description { font-size: .8125rem; line-height: 1.7; }
}
@media (prefers-reduced-motion: no-preference) {
  button, .option, .option input { transition: background-color 120ms ease, border-color 120ms ease; }
}
@media (forced-colors: active) {
  .option input { appearance: auto; }
  .option input:checked::after { display: none; }
}