/* ===== Toothpod brand tokens (sourced from the official logo SVG) ===== */
:root {
  --tp-navy: #013165;
  --tp-navy-soft: #00264f;
  --tp-navy-darker: #001a3a;
  --tp-teal: #68cbdb;
  --tp-teal-deep: #108474;
  --tp-mint: #edf5f5;
  --tp-mint-2: #d6ecee;
  --tp-cream: #f9f9f9;
  --tp-paper: #ffffff;
  --tp-ink: #1a1a1a;
  --tp-muted: #5f6b75;
  --tp-line: #dfe7ee;
  --tp-error: #c0392b;
  --radius: 5px;
  --shadow-sm: 0 1px 2px rgba(0, 26, 58, 0.18);
  --shadow-md: 0 12px 32px rgba(0, 26, 58, 0.22), 0 2px 6px rgba(0, 26, 58, 0.12);
  --shadow-card: 0 6px 22px rgba(1, 49, 101, 0.09), 0 1px 3px rgba(1, 49, 101, 0.06);
  --shadow-focus: 0 0 0 4px rgba(104, 203, 219, 0.45);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  color: var(--tp-ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  background: #ffffff;
}

body {
  min-height: 100dvh;
  color: var(--tp-ink);
  background: #ffffff;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}

/* ===== Top bar: full-width sticky header (logo + label + progress) ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  background: #ffffff;
  border-bottom: 1px solid var(--tp-line);
  box-shadow: 0 2px 12px rgba(1, 49, 101, 0.06);
}

.topbar-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: auto;
  height: 34px;
  max-width: 150px;
}

.progress-label {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--tp-navy);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* Full-bleed progress bar spanning the entire page width */
.progress-track {
  position: relative;
  width: 100%;
  height: 8px;
  background: #e6ecf2;
  overflow: hidden;
}

.progress-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  background: #013165;
  transition: width 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ===== Hero (welcome — shown on step 1 only) ===== */
.hero {
  text-align: left;
  padding: 4px 2px 22px;
}

.hero h1 {
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--tp-navy);
  font-weight: 800;
}

.lede {
  margin: 0 0 16px;
  color: #36424e;
  font-size: 16.5px;
  max-width: 58ch;
}

.lede strong {
  color: var(--tp-navy);
  font-weight: 700;
}

.lede-soft {
  color: var(--tp-muted);
  font-size: 15px;
  font-style: italic;
  margin: 0 0 20px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: var(--radius);
  background: var(--tp-mint);
  color: var(--tp-navy);
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--tp-mint-2);
}

.meta-pill svg {
  width: 14px;
  height: 14px;
}

/* ===== Steps (one question at a time) ===== */
.step {
  animation: stepIn 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.step[hidden] {
  display: none;
}

@keyframes stepIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Question card ===== */
.q {
  background: var(--tp-paper);
  border: 1px solid var(--tp-line);
  border-radius: var(--radius);
  padding: 28px 30px 26px;
  margin: 0;
  box-shadow: var(--shadow-card);
  min-width: 0;
}

/* Float the legend (and clear the next sibling) so it stays inside the card
   padding instead of straddling the top border (default fieldset behavior). */
.q legend {
  float: left;
  width: 100%;
  font-weight: 700;
  font-size: 20px;
  line-height: 1.4;
  color: var(--tp-navy);
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  padding: 0;
}

.q legend + * {
  clear: left;
}

.q-num {
  display: inline-block;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 700;
  color: var(--tp-navy);
  background: var(--tp-mint);
  padding: 4px 9px;
  border-radius: var(--radius);
  margin-right: 10px;
  vertical-align: 3px;
  letter-spacing: 0.04em;
}

/* Helper / placeholder guidance + worked example */
.q-help {
  clear: left;
  color: var(--tp-muted);
  font-size: 14.5px;
  line-height: 1.5;
  margin: 0 0 16px;
}

.q-example {
  clear: left;
  margin: 0 0 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--tp-teal);
  background: var(--tp-mint);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--tp-navy-soft);
  font-size: 13.5px;
  line-height: 1.5;
}

.q-example b {
  color: var(--tp-navy);
}

.q-hint {
  clear: left;
  display: inline-block;
  margin: 0 0 16px;
  color: var(--tp-teal-deep);
  font-size: 13.5px;
  font-weight: 600;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ===== Option (radio / checkbox card) ===== */
.opt {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  border: 1.5px solid var(--tp-line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.05s ease;
  background: var(--tp-paper);
  position: relative;
  user-select: none;
}

.opt:hover {
  border-color: var(--tp-teal);
  background: #f7fcfc;
}

.opt input[type="radio"],
.opt input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
  width: 20px;
  height: 20px;
  min-width: 20px;
  border: 2px solid #c4cdd4;
  background: var(--tp-paper);
  display: inline-grid;
  place-content: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.opt input[type="radio"] {
  border-radius: 50%;
}

.opt input[type="checkbox"] {
  border-radius: var(--radius);
}

.opt input[type="radio"]::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--tp-navy);
  transform: scale(0);
  transition: transform 0.12s ease;
}

.opt input[type="checkbox"]::before {
  content: "";
  width: 11px;
  height: 11px;
  background: var(--tp-navy);
  clip-path: polygon(14% 44%, 0 65%, 43% 100%, 100% 18%, 80% 0%, 41% 65%);
  transform: scale(0);
  transition: transform 0.12s ease;
}

.opt input:checked::before {
  transform: scale(1);
}

.opt input:checked {
  border-color: var(--tp-navy);
}

.opt:has(input:checked) {
  border-color: var(--tp-navy);
  background: var(--tp-mint);
}

.opt:has(input:focus-visible) {
  box-shadow: var(--shadow-focus);
  outline: none;
}

/* Disabled (used when the "choose up to 2" cap is reached) */
.opt:has(input:disabled) {
  opacity: 0.5;
  cursor: not-allowed;
}

.opt:has(input:disabled):hover {
  border-color: var(--tp-line);
  background: var(--tp-paper);
}

.opt > span {
  font-size: 15.5px;
  color: var(--tp-ink);
}

/* Other-with-input row */
.opt-other {
  flex-wrap: wrap;
}

.opt-other .other-input {
  flex: 1 1 100%;
  margin-top: 6px;
  margin-left: 32px;
  padding: 9px 11px;
  border: 1px solid var(--tp-line);
  border-radius: var(--radius);
  font: inherit;
  font-size: 14px;
  color: var(--tp-ink);
  background: var(--tp-paper);
  display: none;
}

.opt-other:has(input:checked) .other-input {
  display: block;
}

.opt-other .other-input:focus {
  outline: none;
  border-color: var(--tp-navy);
  box-shadow: var(--shadow-focus);
}

/* Textarea */
.q textarea {
  clear: left;
  width: 100%;
  font: inherit;
  font-size: 15.5px;
  color: var(--tp-ink);
  padding: 13px 15px;
  border: 1.5px solid var(--tp-line);
  border-radius: var(--radius);
  background: var(--tp-paper);
  resize: vertical;
  min-height: 130px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.q textarea:focus {
  outline: none;
  border-color: var(--tp-navy);
  box-shadow: var(--shadow-focus);
}

/* Validation */
.q.invalid {
  border-color: var(--tp-error);
  background: #fff7f6;
}

.q.invalid legend {
  color: var(--tp-error);
}

/* ===== Navigation / actions ===== */
.actions {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-back {
  appearance: none;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #ffffff;
  background: #013165;
  border: 1.5px solid #013165;
  padding: 14px 18px;
  border-radius: var(--radius);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.nav-back:hover {
  border-color: var(--tp-navy-soft);
  background: var(--tp-navy-soft);
}

.nav-back[hidden] {
  display: none;
}

.spacer {
  flex: 1;
}

.submit-btn {
  appearance: none;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #ffffff;
  background: #013165;
  border: 2px solid #013165;
  padding: 15px 28px;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
  box-shadow: 0 6px 18px rgba(1, 49, 101, 0.22);
}

.submit-btn:hover:not(:disabled) {
  background: var(--tp-navy-soft);
  border-color: var(--tp-navy-soft);
  color: #ffffff;
}

.submit-btn:active {
  transform: translateY(1px);
}

.submit-btn:disabled {
  opacity: 0.85;
  cursor: progress;
}

.submit-btn .submit-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #ffffff;
  border-radius: 50%;
  display: none;
  animation: spin 0.8s linear infinite;
}

.submit-btn.is-loading .submit-spinner {
  display: inline-block;
}

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

.error {
  color: var(--tp-error);
  font-size: 14px;
  font-weight: 600;
  margin: 12px 2px 0;
  min-height: 1em;
  text-align: center;
}

/* ===== Thanks ===== */
.thanks[hidden] {
  display: none;
}

.thanks-card {
  background: var(--tp-paper);
  border-radius: var(--radius);
  padding: 44px 30px;
  text-align: center;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--tp-line);
}

.thanks-mark {
  display: inline-flex;
  margin-bottom: 18px;
}

.thanks-card h2 {
  font-size: 28px;
  letter-spacing: -0.02em;
  color: var(--tp-navy);
  margin: 0 0 10px;
  font-weight: 800;
}

.thanks-card p {
  margin: 0 auto 22px;
  color: var(--tp-muted);
  max-width: 44ch;
}

.thanks-link {
  display: inline-block;
  color: var(--tp-navy);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1.5px solid currentColor;
}

.thanks-link:hover {
  color: var(--tp-navy-soft);
}

/* ===== Footer ===== */
.foot {
  margin-top: 36px;
  text-align: center;
  font-size: 13px;
  color: var(--tp-muted);
}

/* ===== Responsive ===== */
@media (max-width: 540px) {
  .page {
    padding: 16px 14px 60px;
  }

  .topbar-inner {
    padding: 12px 14px;
  }

  .brand-logo {
    height: 30px;
  }

  .q {
    padding: 22px 20px;
  }

  .q legend {
    font-size: 18px;
  }

  .opt {
    padding: 12px 13px;
  }

  .actions {
    flex-wrap: wrap;
  }

  .submit-btn {
    flex: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .step {
    animation: none;
  }
  .progress-fill {
    transition: none;
  }
}