:root {
  color-scheme: light;
  --bg: #f4f7f6;
  --surface: #ffffff;
  --surface-muted: #eef3f1;
  --border: #d7e0dc;
  --text: #1f2d2a;
  --text-soft: #5d6f6a;
  --teal: #1f6f64;
  --teal-dark: #15574f;
  --teal-soft: #e3f1ee;
  --risk-high: #b42318;
  --risk-high-bg: #fef3f2;
  --risk-low: #1f6f64;
  --risk-low-bg: #e8f5f1;
  --shadow: 0 10px 30px rgba(31, 45, 42, 0.06);
  --radius: 14px;
  --radius-sm: 10px;
  --font: "Segoe UI", Inter, system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: var(--teal-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 0.98rem;
}

.brand-text small {
  color: var(--text-soft);
  font-size: 0.76rem;
}

.header-nav {
  display: flex;
  gap: 14px;
  font-size: 0.88rem;
}

.header-nav a {
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--text-soft);
}

.header-nav a.active,
.header-nav a:hover {
  background: var(--teal-soft);
  color: var(--teal-dark);
  text-decoration: none;
}

.page-main {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 24px 16px 32px;
  flex: 1;
}

.page-main.narrow {
  width: min(760px, 100%);
}

.layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  align-items: start;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

.panel-muted {
  background: var(--surface-muted);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-soft);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.15;
}

.lead {
  margin: 0 0 20px;
  color: var(--text-soft);
  max-width: 56ch;
}

.form-section {
  margin-top: 18px;
}

.form-section h2 {
  margin: 0 0 12px;
  font-size: 0.92rem;
  color: var(--teal-dark);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

.field input,
.field select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  padding: 11px 12px;
  font: inherit;
}

.field input:focus,
.field select:focus {
  outline: 2px solid rgba(31, 111, 100, 0.18);
  border-color: var(--teal);
}

.info-tip {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.info-btn {
  width: 18px;
  height: 18px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: #fff;
  color: var(--text-soft);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1;
  cursor: help;
  padding: 0;
}

.info-btn:hover,
.info-tip:hover .info-btn,
.info-tip:focus-within .info-btn {
  background: var(--teal-soft);
  color: var(--teal-dark);
  border-color: #b9d5cf;
}

.info-popover {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  transform: translateX(-50%);
  width: max-content;
  max-width: 240px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--text);
  color: #fff;
  font-size: 0.76rem;
  line-height: 1.45;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.15s ease, visibility 0.15s ease;
  z-index: 40;
}

.info-popover::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--text);
}

.info-tip:hover .info-popover,
.info-tip:focus-within .info-popover {
  opacity: 1;
  visibility: visible;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 18px;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--teal);
  color: #fff;
}

.btn-primary:hover {
  background: var(--teal-dark);
}

.btn-primary:disabled {
  opacity: 0.65;
  cursor: wait;
}

.btn-ghost {
  background: #fff;
  border-color: var(--border);
  color: var(--text);
}

.result-panel {
  position: sticky;
  top: 88px;
}

.result-card {
  display: none;
}

.result-card.show {
  display: block;
}

.risk-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.risk-badge.high {
  background: var(--risk-high-bg);
  color: var(--risk-high);
}

.risk-badge.low {
  background: var(--risk-low-bg);
  color: var(--risk-low);
}

.risk-score {
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  font-weight: 700;
  margin: 14px 0 6px;
  line-height: 1;
}

.meter {
  width: 100%;
  height: 10px;
  background: #e6ecea;
  border-radius: 999px;
  overflow: hidden;
  margin: 14px 0 18px;
}

.meter > span {
  display: block;
  height: 100%;
  background: var(--teal);
  border-radius: inherit;
  width: 0;
  transition: width 0.35s ease;
}

.meter.high > span {
  background: var(--risk-high);
}

.factor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.factor-list li {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: #fff;
  border: 1px solid var(--border);
  font-size: 0.86rem;
  color: var(--text-soft);
}

.error-box {
  display: none;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--risk-high-bg);
  color: var(--risk-high);
  border: 1px solid #f3c6c1;
  font-size: 0.88rem;
}

.error-box.show {
  display: block;
}

.prose h2 {
  font-size: 0.92rem;
  margin: 28px 0 10px;
  color: var(--teal-dark);
}

.prose p {
  color: var(--text-soft);
}

.app-footer {
  padding: 18px 20px 24px;
  text-align: center;
  color: var(--text-soft);
  font-size: 0.84rem;
}

.not-found-page {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px 16px;
}

.not-found-code {
  margin: 0 0 8px;
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-soft);
}

.not-found-page h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text);
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .result-panel {
    position: static;
  }
}

@media (max-width: 640px) {
  .field-grid {
    grid-template-columns: 1fr;
  }

  .header-nav {
    gap: 6px;
  }

  .form-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}