:root {
  --color-bg: #F6F9FB;
  --color-surface: #FFFFFF;
  --color-primary: #1B4F8A;
  --color-primary-soft: #EAF2F8;
  --color-accent: #2E8B57;
  --color-warning: #E67E22;
  --color-danger: #C0392B;
  --color-text: #2C3E50;
  --color-text-muted: #6C757D;
  --color-border: #DEE2E6;
  --font-body: 'Source Sans 3', sans-serif;
  --font-heading: 'Lora', serif;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--color-primary);
}

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.nav-shell,
.page-shell,
.safety-footer {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 16px;
}

.nav-shell {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 600;
  text-decoration: none;
}

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.language-toggle,
.button,
button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  font: 600 16px var(--font-body);
  text-decoration: none;
  cursor: pointer;
}

.secondary {
  background: var(--color-surface);
  color: var(--color-primary);
}

.records-button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid #172033;
  background: #172033;
  color: #fff;
  font: 700 16px var(--font-body);
  text-decoration: none;
}

.records-button:hover {
  background: #0F172A;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  line-height: 1.25;
  margin: 0 0 12px;
}

h1 {
  font-size: clamp(24px, 7vw, 38px);
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 20px;
}

.hero,
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin: 0 0 20px;
}

.hero {
  margin-top: 16px;
}

.patient-hero {
  border-top: 6px solid var(--color-primary);
}

.lead {
  font-size: 18px;
  color: var(--color-text);
}

.eyebrow,
.muted,
.note {
  color: var(--color-text-muted);
}

.eyebrow {
  font-weight: 600;
  letter-spacing: 0;
  margin: 0 0 8px;
}

.note {
  background: var(--color-primary-soft);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 12px;
}

.safety-banner {
  background: #F0F6FA;
  border: 1px solid #C8DAE8;
  border-left: 6px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 16px;
  margin: 18px 0;
}

.safety-banner p {
  margin: 6px 0 0;
}

.flow,
.safety-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 18px 0;
  padding: 0;
}

.flow span,
.safety-list li {
  display: block;
  border: 1px solid #C8DAE8;
  border-radius: var(--radius);
  background: #F8FBFD;
  padding: 12px;
  font-weight: 600;
  text-align: center;
}

.safety-list {
  list-style: none;
}

.error {
  color: var(--color-danger);
  font-weight: 600;
}

label,
legend {
  display: block;
  font-weight: 600;
  margin: 16px 0 6px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
input[type="file"],
select,
textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px;
  font: 16px var(--font-body);
  background: #fff;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.required {
  color: var(--color-danger);
  font-size: 14px;
  font-weight: 700;
}

fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 12px 12px;
  margin: 16px 0;
}

.radio-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 8px 0;
  font-weight: 500;
}

.form-section {
  border-top: 1px solid var(--color-border);
  margin-top: 22px;
  padding-top: 22px;
}

.form-section:first-child {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 18px;
}

.collapsible-section,
.consent-section {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  background: #FBFCFD;
}

.collapsible-section summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary);
}

.progress-bar {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: #E4E9EE;
  overflow: hidden;
}

.progress-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--color-accent);
  transition: width 240ms ease;
}

.state-card,
.section-header,
.button-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 4px solid #DDE6ED;
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  flex: 0 0 auto;
}

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

.clean-list {
  list-style: none;
  padding: 0;
}

.clean-list li,
.session-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #EAF3EE;
  color: var(--color-accent);
  padding: 4px 10px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.timeline-item,
.topic-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  margin: 12px 0;
  background: #FBFCFD;
}

.card-grid {
  display: grid;
  gap: 12px;
}

.topic-card {
  max-width: 480px;
}

.topic-zh {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.topic-zh h3 {
  margin-bottom: 6px;
}

.question-list {
  padding-left: 24px;
}

.session-row {
  color: var(--color-text);
  text-decoration: none;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
}

th,
td {
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  padding: 10px;
  vertical-align: top;
}

.markdown-render {
  display: grid;
  gap: 10px;
}

.markdown-render h3 {
  margin: 8px 0 0;
}

.markdown-render p,
.markdown-render ul {
  margin: 0;
}

.safety-footer {
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  margin-top: 24px;
}

@media (min-width: 760px) {
  .nav-shell,
  .page-shell,
  .safety-footer {
    padding: 32px;
  }
}

@media (max-width: 560px) {
  .hero,
  .card {
    padding: 18px;
  }

  .flow,
  .safety-list,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .flow span,
  .safety-list li {
    text-align: left;
  }

  .state-card,
  .section-header,
  .button-row,
  .clean-list li,
  .session-row {
    align-items: flex-start;
    flex-direction: column;
  }
}