:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --ink: #0f172a;
  --ink-soft: #475569;
  --ink-muted: #94a3b8;
  --accent: #1e40af;
  --accent-hover: #1e3a8a;
  --accent-soft: #dbeafe;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --success: #16a34a;
  --warning: #ca8a04;
  --danger: #dc2626;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 4px 12px rgba(15,23,42,.08);
  --radius: 12px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 780px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

/* ─── Top bar ─────────────────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.brand-icon { font-size: 20px; }
.brand-text { font-size: 16px; letter-spacing: -0.01em; }

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  overflow: hidden;
  background: #f1f5f9;
}
.lang-btn {
  background: transparent;
  border: none;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.lang-btn.active { background: var(--ink); color: white; }
.lang-btn:not(.active):hover { background: #e2e8f0; }

/* ─── Progress bar ───────────────────────────────────────────────────── */
.progress-wrap { padding: 16px 20px 4px; }
.progress-label {
  font-size: 13px;
  color: var(--ink-muted);
  margin-bottom: 6px;
  font-weight: 500;
}
.progress-bar {
  height: 6px;
  background: #f1f5f9;
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #3b82f6);
  border-radius: 999px;
  width: 0%;
  transition: width .25s ease;
}

/* ─── Screen ─────────────────────────────────────────────────────────── */
.screen {
  flex: 1;
  padding: 28px 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.screen h1 {
  font-size: 22px;
  line-height: 1.3;
  margin: 0 0 4px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.015em;
}
.screen h2 {
  font-size: 17px;
  line-height: 1.4;
  margin: 0;
  font-weight: 600;
  color: var(--ink);
}
.screen .qbody { color: var(--ink-soft); font-size: 15.5px; }
.screen .qbody p { margin: 0 0 12px; }
.screen .qbody ul, .screen .qbody ol { margin: 0 0 12px; padding-left: 22px; }
.screen .qbody li { margin: 4px 0; }
.screen .qbody em { color: var(--ink-soft); font-style: italic; }
.screen .qbody strong { color: var(--ink); font-weight: 600; }
.screen .qbody .note {
  font-style: italic;
  background: #eff6ff;
  border-left: 3px solid #3b82f6;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  color: #1e40af;
}
.qstep {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ─── Answer options ─────────────────────────────────────────────────── */
.options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.opt-btn {
  text-align: left;
  background: var(--surface);
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  transition: border-color .12s, background .12s, transform .04s;
  font-family: inherit;
}
.opt-btn:hover { border-color: var(--accent); background: #f8fafc; }
.opt-btn:active { transform: scale(0.99); }
.opt-btn.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-hover);
}
.opt-btn.selected::after {
  content: "✓";
  float: right;
  font-weight: 700;
  color: var(--accent);
}

/* checkbox-style (multi-select) */
.opt-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--surface);
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 13px 16px;
  cursor: pointer;
  transition: border-color .12s, background .12s;
}
.opt-check:hover { border-color: var(--accent); }
.opt-check input[type=checkbox] {
  margin: 3px 0 0;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}
.opt-check.selected { border-color: var(--accent); background: var(--accent-soft); }
.opt-check span { font-size: 15px; line-height: 1.4; color: var(--ink); }

/* text input */
.text-input {
  width: 100%;
  font: inherit;
  font-size: 15.5px;
  padding: 12px 14px;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius);
  background: white;
  color: var(--ink);
  outline: none;
  transition: border-color .12s, box-shadow .12s;
}
.text-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
textarea.text-input { min-height: 110px; resize: vertical; font-family: inherit; }

.validation-error {
  background: #fee2e2;
  color: #991b1b;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  border-left: 3px solid var(--danger);
}

/* ─── Review screen ──────────────────────────────────────────────────── */
.review-list { display: flex; flex-direction: column; gap: 10px; }
.review-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  background: #fafbfc;
}
.review-q {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.review-a { color: var(--ink); font-size: 15px; line-height: 1.5; }
.review-edit {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  margin-top: 6px;
  font-family: inherit;
}
.review-edit:hover { text-decoration: underline; }

/* ─── Footer / nav buttons ───────────────────────────────────────────── */
.footer {
  display: flex;
  gap: 10px;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  bottom: 0;
}
.nav-btn {
  flex: 1;
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  padding: 13px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: background .12s, transform .04s, opacity .12s;
}
.nav-btn:active { transform: scale(0.99); }
.nav-btn.primary {
  background: var(--accent);
  color: white;
}
.nav-btn.primary:hover { background: var(--accent-hover); }
.nav-btn.primary:disabled { background: var(--ink-muted); cursor: not-allowed; opacity: 0.6; }
.nav-btn.ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: var(--border-strong);
}
.nav-btn.ghost:hover { background: #f1f5f9; }

/* ─── Intro / privacy / result screens ───────────────────────────────── */
.intro-card {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 8px 0;
}
.intro-card .badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  align-self: flex-start;
}
.intro-card .lead {
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
}
.privacy-banner {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-left: 4px solid #ef4444;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  color: #991b1b;
  white-space: pre-line;
}

/* ─── Mobile tweaks ──────────────────────────────────────────────────── */
@media (max-width: 600px) {
  body { font-size: 15px; }
  .screen { padding: 22px 18px 16px; }
  .screen h1 { font-size: 19px; }
  .topbar { padding: 12px 16px; }
  .progress-wrap { padding: 14px 18px 4px; }
  .footer { padding: 14px 18px 18px; }
  .opt-btn, .opt-check { padding: 12px 14px; font-size: 15px; }
}