:root {
  --color-bg-canvas: #0d061b;
  --color-bg-canvas-deep: #0d061b;
  --color-bg-surface: #211342;
  --color-bg-surface-subtle: #271c64;
  --color-bg-track: #392e7d;
  --color-brand-primary: #70dc6c;
  --color-brand-hover: #82e77e;
  --color-brand-active: #5ccb5b;
  --color-brand-soft: rgb(112 220 108 / 14%);
  --color-text-primary: #f8f8ff;
  --color-text-secondary: #c9c5e5;
  --color-text-muted: #9189bb;
  --color-text-on-brand: #191055;
  --color-border-brand: #67d96a;
  --color-border-subtle: rgb(112 220 108 / 58%);
  --color-focus: #a4f59f;
  --color-danger: #ff6b7a;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --radius-control: 6px;
  --radius-badge: 8px;
  --radius-panel: 16px;
  --motion-fast: 120ms;
  --motion-base: 180ms;
  --motion-slow: 260ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
}

* { box-sizing: border-box; }

html { background: var(--color-bg-canvas-deep); }

body {
  min-height: 100dvh;
  margin: 0;
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  background-color: var(--color-bg-canvas);
}

button, input, textarea { font: inherit; }
button { cursor: pointer; }
fieldset { min-width: 0; padding: 0; margin: 0; border: 0; }

.survey-shell {
  width: min(100% - 48px, 740px);
  min-height: 100dvh;
  margin: 0 auto;
  padding: 48px 0 28px;
}

.brand-header {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.brand-lockup {
  display: grid;
  grid-template-columns: 205px max-content;
  align-items: center;
  column-gap: 18px;
  width: fit-content;
  max-width: 100%;
}

.brand-symbol {
  display: block;
  width: 196px;
  height: 176px;
  background: url("./assets/brand-symbol.png") center / contain no-repeat;
}

.brand-title {
  display: grid;
  margin: 0;
  color: var(--color-text-primary);
  font-size: 64px;
  font-weight: 900;
  line-height: 1.03;
  letter-spacing: 0;
}

.brand-title span { white-space: nowrap; }

.brand-tagline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 0;
  color: var(--color-brand-primary);
  font-size: 18px;
  font-weight: 700;
  line-height: 24px;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-tagline::before,
.brand-tagline::after {
  width: 42px;
  height: 2px;
  content: "";
  background: var(--color-brand-primary);
}

.progress-summary {
  display: grid;
  grid-template-columns: auto minmax(160px, 1fr) auto;
  align-items: center;
  gap: 18px;
  min-height: 58px;
  margin-top: 18px;
  padding: 0 22px;
  background: rgb(39 28 100 / 72%);
  border: 1px solid rgb(112 220 108 / 22%);
  border-radius: var(--radius-panel);
}

.progress-label { color: var(--color-text-primary); font-size: 18px; font-weight: 700; line-height: 26px; }
.progress-value { color: var(--color-brand-primary); font-size: 24px; font-weight: 800; line-height: 32px; white-space: nowrap; }

.progress-track { height: 18px; overflow: hidden; background: var(--color-bg-track); border-radius: 999px; }
.progress-fill { display: block; width: 0%; height: 100%; background: var(--color-brand-primary); border-radius: inherit; transition: width var(--motion-slow) var(--ease-standard); }

.questionnaire-panel {
  margin-top: 16px;
  padding: 4px 24px 20px;
  background: var(--color-bg-surface);
  border: 2px solid var(--color-border-brand);
  border-radius: var(--radius-panel);
}

.question-section { padding: 20px 0; }
.question-section + .question-section { border-top: 1px solid var(--color-border-subtle); }
.section-kicker { margin: 20px 0 0; color: var(--color-brand-primary); font-size: 14px; font-weight: 800; line-height: 20px; }

.question-heading {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.question-number {
  display: grid;
  width: 54px;
  height: 38px;
  place-items: center;
  color: var(--color-text-on-brand);
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  background: var(--color-brand-primary);
  border-radius: var(--radius-badge);
}

.question-title { margin: 2px 0 0; color: var(--color-text-primary); font-size: 20px; font-weight: 700; line-height: 30px; }
.required-marker { color: var(--color-brand-primary); }
.question-copy { margin: 6px 0 0 72px; color: var(--color-text-secondary); font-size: 15px; line-height: 24px; }

.field-control { margin: 16px 0 0 72px; }
.text-field, .select-field, .textarea-field {
  display: block;
  width: 100%;
  color: var(--color-text-primary);
  background: rgb(12 16 75 / 52%);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-control);
  outline: 0;
  transition: border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);
}
.text-field, .select-field { min-height: 44px; padding: 8px 14px; }
.select-field { appearance: auto; cursor: pointer; }
.select-field option { color: var(--color-text-primary); background: var(--color-bg-surface); }
.identity-fields {
  display: grid;
  grid-template-columns: minmax(170px, 0.8fr) minmax(220px, 1.2fr);
  gap: 12px;
  margin: 16px 0 0 72px;
}
.identity-field { display: grid; gap: 6px; min-width: 0; }
.field-label { color: var(--color-text-secondary); font-size: 14px; font-weight: 700; line-height: 20px; }
.textarea-wrap { position: relative; }
.textarea-field { min-height: 112px; max-height: 160px; padding: 12px 14px 30px; resize: vertical; }
.text-field::placeholder, .textarea-field::placeholder { color: var(--color-text-muted); }
.text-field:focus, .select-field:focus, .textarea-field:focus { border-color: var(--color-focus); box-shadow: 0 0 0 3px var(--color-brand-soft); }
.textarea-counter { position: absolute; right: 12px; bottom: 8px; color: var(--color-text-muted); font-size: 13px; line-height: 20px; pointer-events: none; }

.options-grid { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 16px 0 0 72px; }
.conditional-question { margin: 18px 0 0 72px; padding: 16px 0 0; border-top: 1px solid var(--color-border-subtle); }
.conditional-question .options-grid { margin-left: 0; }
.conditional-title { margin: 0; color: var(--color-text-primary); font-size: 16px; font-weight: 700; line-height: 24px; }
.choice-label { display: inline-flex; max-width: 100%; align-items: center; min-height: 44px; gap: 10px; color: var(--color-text-secondary); font-size: 17px; font-weight: 500; line-height: 26px; cursor: pointer; }
.choice-text { min-width: 0; overflow-wrap: anywhere; }
.choice-label input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.radio-control, .checkbox-control { display: grid; width: 26px; height: 26px; flex: 0 0 auto; place-items: center; border: 2px solid var(--color-text-primary); transition: border-color var(--motion-fast) var(--ease-standard), background-color var(--motion-fast) var(--ease-standard); }
.radio-control { border-radius: 50%; }
.checkbox-control { border-radius: var(--radius-control); }
.radio-control::after { width: 12px; height: 12px; content: ""; background: var(--color-brand-primary); border-radius: 50%; transform: scale(0.8); opacity: 0; transition: transform var(--motion-fast) var(--ease-standard), opacity var(--motion-fast) var(--ease-standard); }
.checkbox-control::after { width: 14px; height: 14px; content: ""; background: var(--color-bg-canvas); mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='black' d='M6.25 12.2 1.8 7.76l1.42-1.42 3.03 3.02L12.78 2.8l1.42 1.42z'/%3E%3C/svg%3E") center / contain no-repeat; opacity: 0; transform: scale(0.8); transition: transform var(--motion-fast) var(--ease-standard), opacity var(--motion-fast) var(--ease-standard); }
.choice-label input:checked + .radio-control { border-color: var(--color-brand-primary); }
.choice-label input:checked + .radio-control::after, .choice-label input:checked + .checkbox-control::after { opacity: 1; transform: scale(1); }
.choice-label input:checked + .checkbox-control { background: var(--color-brand-primary); border-color: var(--color-brand-primary); }
.choice-label:hover .radio-control, .choice-label:hover .checkbox-control { border-color: var(--color-brand-hover); }
.choice-label input:focus-visible + .radio-control, .choice-label input:focus-visible + .checkbox-control, .button:focus-visible, .draft-action:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }

.field-error { min-height: 20px; margin: 6px 0 0 72px; color: var(--color-danger); font-size: 13px; line-height: 20px; }
.other-field { display: grid; gap: 6px; margin: 12px 0 0 72px; }
.other-field[hidden] { display: none; }
.has-error .text-field, .has-error .select-field, .has-error .textarea-field { border-color: var(--color-danger); }
.has-error .radio-control, .has-error .checkbox-control { border-color: var(--color-danger); }

.form-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; width: min(100%, 584px); margin: 4px auto 0; padding-top: 20px; border-top: 1px solid var(--color-border-subtle); }
.form-actions[hidden] { display: none !important; }
.form-actions.single-action { grid-template-columns: 1fr; }
.button { min-height: 56px; padding: 0 28px; border: 0; border-radius: 999px; font-size: 18px; font-weight: 800; line-height: 24px; letter-spacing: 0; white-space: nowrap; transition: background-color var(--motion-fast) var(--ease-standard), transform var(--motion-fast) var(--ease-standard), opacity var(--motion-fast) var(--ease-standard); }
.button:active { transform: translateY(1px); }
.button-primary, .button-secondary { display: inline-flex; align-items: center; justify-content: center; gap: 12px; width: 100%; }
#previous-button[hidden] { display: none !important; }
.button-primary { color: var(--color-text-on-brand); background: var(--color-brand-primary); }
.button-primary:hover { background: var(--color-brand-hover); }
.button-primary:disabled { cursor: not-allowed; opacity: 0.55; }
.button-secondary { color: var(--color-brand-primary); background: transparent; border: 1px solid var(--color-border-subtle); }
.button-secondary:hover { color: var(--color-text-on-brand); background: var(--color-brand-primary); border-color: var(--color-brand-primary); }

.draft-action { display: inline-flex; align-items: center; min-height: 44px; gap: 8px; margin: 12px auto 0; padding: 0 10px; color: var(--color-brand-primary); font-size: 16px; font-weight: 700; line-height: 24px; white-space: nowrap; background: transparent; border: 0; }
.draft-action[hidden] { display: none !important; }
.draft-action:hover { color: var(--color-brand-hover); }
.draft-icon { width: 18px; height: 18px; flex: 0 0 auto; }
.questionnaire-panel > .draft-action { display: flex; justify-content: center; }
.privacy-note, .status-message { margin: 4px auto 0; text-align: center; }
.privacy-note { max-width: 520px; color: var(--color-text-muted); font-size: 13px; line-height: 20px; }
.status-message { min-height: 20px; color: var(--color-brand-primary); font-size: 14px; line-height: 20px; }

.completion { padding: 34px 0 20px; text-align: center; }
.completion-mark { display: grid; width: 56px; height: 56px; margin: 0 auto 18px; place-items: center; color: var(--color-text-on-brand); font-size: 28px; font-weight: 900; background: var(--color-brand-primary); border-radius: 50%; }
.completion h3 { margin: 0; font-size: 28px; line-height: 38px; }
.completion p { max-width: 420px; margin: 10px auto 0; color: var(--color-text-secondary); font-size: 16px; line-height: 24px; }
.completion .button { margin-top: 24px; }

.workbuddy-info-dialog {
  width: min(calc(100% - 40px), 520px);
  padding: 0;
  color: var(--color-text-primary);
  background: var(--color-bg-surface);
  border: 2px solid var(--color-border-brand);
  border-radius: var(--radius-badge);
}
.workbuddy-info-dialog::backdrop { background: rgb(13 6 27 / 78%); }
.workbuddy-info-content { padding: 28px; }
.dialog-kicker { margin: 0 0 10px; color: var(--color-brand-primary); font-size: 14px; font-weight: 800; line-height: 20px; }
.workbuddy-info-content h2 { margin: 0; font-size: 24px; line-height: 32px; }
.workbuddy-info-content p:not(.dialog-kicker) { margin: 14px 0 0; color: var(--color-text-secondary); font-size: 16px; line-height: 26px; }
.dialog-close { margin-top: 24px; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 767px) {
  .survey-shell { width: min(100% - 32px, 740px); padding: 24px 0; }
  .brand-lockup { grid-template-columns: 168px max-content; column-gap: 12px; }
  .brand-symbol { width: 156px; height: 142px; }
  .brand-title { font-size: 48px; }
  .brand-tagline { font-size: 16px; }
  .questionnaire-panel { padding: 4px 16px 16px; }
  .question-title { font-size: 18px; line-height: 28px; }
  .choice-label { font-size: 16px; line-height: 24px; }
  .workbuddy-info-content { padding: 24px 20px; }
}

@media (max-width: 559px) {
  .brand-lockup { grid-template-columns: 108px minmax(0, 1fr); width: 100%; column-gap: 8px; }
  .brand-symbol { width: 100px; height: 92px; }
  .brand-title { font-size: 34px; }
  .brand-tagline { gap: 8px; margin-top: -1px; font-size: 13px; }
  .brand-tagline::before, .brand-tagline::after { width: 24px; }
  .progress-summary { grid-template-columns: 1fr auto; gap: 4px 12px; min-height: 76px; padding: 10px 14px; }
  .progress-track { grid-row: 2; grid-column: 1 / -1; width: 100%; }
  .question-heading { grid-template-columns: 48px minmax(0, 1fr); gap: 12px; }
  .question-number { width: 48px; }
  .question-copy, .field-control, .identity-fields, .options-grid, .other-field, .field-error, .conditional-question { margin-left: 60px; }
  .form-actions { align-items: stretch; }
  .button { width: 100%; }
}

@media (max-width: 419px) {
  .identity-fields { grid-template-columns: 1fr; }
  .options-grid { display: grid; grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 80ms !important; animation-duration: 80ms !important; }
}