/* =========================================================
   Dizziness Intake — Design Tokens
   ========================================================= */
:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f5f9fc;
  --color-card: #ffffff;

  --color-primary: #1f5c8b;
  --color-primary-dark: #133e5f;
  --color-primary-light: #e9f2fa;
  --color-primary-lighter: #f3f8fc;

  --color-accent: #4fa79a;      /* balance / vestibular teal */
  --color-accent-light: #e6f3f1;

  --color-warn: #a3491f;
  --color-warn-bg: #fbf0e9;

  --color-text: #172433;
  --color-text-muted: #5c6b7a;
  --color-text-soft: #8393a3;

  --color-border: #dfe7ef;
  --color-border-strong: #c4d3e0;

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 9px;

  --shadow-card: 0 6px 28px rgba(23, 55, 87, 0.07);
  --shadow-card-hover: 0 8px 32px rgba(23, 55, 87, 0.12);

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --transition-fast: 160ms ease;
  --transition-med: 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  font-size: 18px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-primary-dark);
  margin: 0 0 0.5em 0;
  line-height: 1.2;
}

p { margin: 0 0 1em 0; }

button {
  font-family: var(--font-body);
  font-size: 1rem;
}

/* Focus visibility for accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* =========================================================
   Shell / layout
   ========================================================= */
.app-shell {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px 60px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  padding: 28px 0 6px;
  text-align: center;
}

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--color-primary);
}

.brand-mark { color: var(--color-primary); display: inline-flex; }

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
}

.brand-tagline {
  margin: 6px 0 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Balance horizon — signature progress motif */
.horizon-wrap {
  max-width: 320px;
  margin: 22px auto 4px;
}

#horizonSvg {
  width: 100%;
  height: 20px;
  overflow: visible;
}

#horizonLine {
  stroke: var(--color-border-strong);
  stroke-width: 1.6;
  stroke-linecap: round;
  transform-origin: 100px 12px;
  transition: transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

#horizonDot {
  fill: var(--color-accent);
  transition: cx 600ms cubic-bezier(0.4, 0, 0.2, 1), transform 600ms ease;
}

.progress-track {
  height: 8px;
  background: var(--color-primary-light);
  border-radius: 999px;
  overflow: hidden;
  margin: 8px 0 6px;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  border-radius: 999px;
  transition: width var(--transition-med);
}

.progress-label {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-soft);
  margin: 0 0 10px;
  min-height: 1.2em;
}

.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.screen { display: none; }
.screen[data-active="true"] { display: block; animation: fadeSlideIn var(--transition-med); }

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

/* =========================================================
   Cards
   ========================================================= */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 34px 30px;
  margin-bottom: 22px;
}

@media (max-width: 560px) {
  .card { padding: 24px 18px; border-radius: var(--radius-md); }
  body { font-size: 17px; }
}

/* Welcome screen */
.welcome-title {
  font-size: 1.7rem;
}

.welcome-body { color: var(--color-text); }

.welcome-points {
  margin: 0 0 22px;
  padding-left: 1.3em;
  color: var(--color-text-muted);
}
.welcome-points li { margin-bottom: 6px; }

.welcome-notice {
  background: var(--color-primary-lighter);
  border: 1px solid var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: 26px;
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  border: none;
  border-radius: var(--radius-md);
  padding: 15px 26px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  min-height: 54px;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-primary:disabled {
  background: var(--color-border-strong);
  color: #fff;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-accent-light);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-accent);
}
.btn-secondary:hover { background: #d9ece8; }

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-strong);
}
.btn-ghost:hover { background: var(--color-bg-soft); color: var(--color-text); }

.btn-large {
  width: 100%;
  font-size: 1.08rem;
  padding: 18px 26px;
}

/* =========================================================
   Question card
   ========================================================= */
.question-card { min-height: 320px; display: flex; flex-direction: column; justify-content: space-between; }

.q-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.q-title {
  font-size: 1.45rem;
  margin-bottom: 6px;
}

.q-subtitle {
  color: var(--color-text-muted);
  font-size: 0.98rem;
  margin-bottom: 22px;
}

.q-optional-tag {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--color-text-soft);
  background: var(--color-bg-soft);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 18px;
  font-weight: 500;
}

/* Option buttons (single / multi select) */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 8px;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  text-align: left;
  background: var(--color-bg-soft);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  font-size: 1.03rem;
  color: var(--color-text);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 56px;
}

.option-btn:hover { border-color: var(--color-primary); background: var(--color-primary-lighter); }

.option-btn[aria-pressed="true"] {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  box-shadow: 0 0 0 1px var(--color-primary) inset;
  font-weight: 600;
}

.option-check {
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  border: 2px solid var(--color-border-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: all var(--transition-fast);
}

.option-btn.is-radio .option-check { border-radius: 999px; }

.option-btn[aria-pressed="true"] .option-check {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.option-check svg { width: 14px; height: 14px; opacity: 0; transition: opacity var(--transition-fast); }
.option-btn[aria-pressed="true"] .option-check svg { opacity: 1; }

/* Yes/No layout */
.yesno-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.yesno-row .option-btn { justify-content: center; text-align: center; }

/* Text inputs */
.text-input, .textarea-input, .number-input, .select-input {
  width: 100%;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 15px 16px;
  font-size: 1.03rem;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg-soft);
  transition: border-color var(--transition-fast);
}
.text-input:focus, .textarea-input:focus, .number-input:focus, .select-input:focus {
  border-color: var(--color-primary);
  outline: none;
  background: #fff;
}
.textarea-input { min-height: 130px; resize: vertical; line-height: 1.5; }

.field-hint { color: var(--color-text-soft); font-size: 0.85rem; margin-top: 8px; }

/* Nav row */
.nav-row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--color-border);
}
.nav-row-single { justify-content: center; }
.nav-row .btn { flex: 1; }
.nav-row .btn-ghost { flex: 0 0 auto; min-width: 110px; }

/* =========================================================
   Loading screen
   ========================================================= */
.loading-card { text-align: center; padding: 60px 30px; }
.loading-spinner { display: flex; justify-content: center; margin-bottom: 22px; }
.spin-arc { animation: spin 1.1s linear infinite; transform-origin: 30px 30px; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-title { font-size: 1.3rem; }
.loading-body { color: var(--color-text-muted); }

/* Error */
.error-title { color: var(--color-warn); }
.error-body { color: var(--color-text-muted); }

/* =========================================================
   Results
   ========================================================= */
.results-wrap { padding-top: 4px; }

.results-header-card { text-align: center; }
.results-title { font-size: 1.65rem; }
.results-subtitle { color: var(--color-text-muted); max-width: 520px; margin-left: auto; margin-right: auto; }

.results-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 18px;
}
.results-actions .btn { flex: 0 1 auto; }

.copy-confirm {
  margin: 12px 0 0;
  min-height: 1.2em;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.92rem;
}

.result-heading { font-size: 1.2rem; margin-bottom: 14px; }

.result-body { color: var(--color-text); }
.result-prose { white-space: pre-wrap; line-height: 1.65; }

.result-list {
  margin: 0;
  padding-left: 1.35em;
  color: var(--color-text);
}
.result-list li { margin-bottom: 10px; line-height: 1.5; }
.result-list-numbered li { margin-bottom: 16px; }

.result-list-numbered .dx-name { font-weight: 700; color: var(--color-primary-dark); display: block; margin-bottom: 2px; }
.result-list-numbered .dx-rationale { color: var(--color-text-muted); }

.result-section-flag {
  border-left: 4px solid var(--color-warn);
}
.result-section-flag .result-heading { color: var(--color-warn); }

.empty-note { color: var(--color-text-soft); font-style: italic; margin: 0; }

/* Patient summary key/value grid */
.summary-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.summary-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.98rem;
}
.summary-row:last-child { border-bottom: none; }
.summary-key { color: var(--color-text-muted); font-weight: 600; }
.summary-val { color: var(--color-text); }

@media (max-width: 560px) {
  .summary-row { grid-template-columns: 1fr; gap: 2px; }
}

.disclaimer-footer {
  text-align: center;
  color: var(--color-text-soft);
  font-size: 0.85rem;
  padding: 10px 10px 0;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  text-align: center;
  color: var(--color-text-soft);
  font-size: 0.82rem;
  padding: 10px 20px 30px;
}