:root {
  --color-bg: #FAFAFA;
  --color-text: #111318;
  --color-heading: #1F2937;
  --color-link: #C2410C;
  --color-accent: #EA580C;
  --color-on-accent: #FFFFFF;
  --color-positive: #3A7D44;
  --color-negative: #B4453A;

  --font-heading: "Sora", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;

  --font-size-h1: 40px;
  --font-size-h2: 28px;
  --font-size-h3: 20px;
  --font-size-body: 16px;
  --font-size-label: 13px;

  --radius: 12px;
  --card-padding: 20px 24px;
  --section-space-desktop: 96px;
  --section-space-mobile: 48px;
  --heading-gap: 24px;
  --paragraph-gap: 16px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-heading);
  margin: 0 0 0.5em;
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }

p { margin: 0 0 var(--paragraph-gap); }

small {
  font-size: 13px;
  color: var(--color-text);
  opacity: 0.72;
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a svg.arrow-icon {
  display: inline-block;
  vertical-align: baseline;
  width: 12px;
  height: 12px;
  margin-left: 4px;
  stroke: currentColor;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px 64px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--color-heading);
  padding-top: 32px;
  margin-bottom: 64px;
}

.wordmark .wordmark-bar {
  width: 14px;
  height: 22px;
  background: var(--color-accent);
  border-radius: 3px;
}

.hero {
  margin-bottom: var(--section-space-desktop);
}

.hero h1 {
  margin-bottom: var(--heading-gap);
}

.hero p {
  font-size: 18px;
  max-width: 60ch;
  margin-bottom: 0;
}

.section-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--font-size-label);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-heading);
  margin: 0 0 12px;
}

.card {
  border: 1px solid var(--color-heading);
  border-radius: var(--radius);
  padding: var(--card-padding);
  background: var(--color-bg);
  text-align: left;
  margin-bottom: 24px;
}

.field-group {
  margin-bottom: 20px;
}

.field-group:last-child {
  margin-bottom: 0;
}

.field-label {
  display: block;
  font-size: var(--font-size-label);
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
  color: var(--color-heading);
}

input[type="number"],
input[type="text"],
input[type="date"],
select {
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-heading);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 8px;
  appearance: none;
}

input:focus,
select:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
  border-color: var(--color-heading);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.form-grid.two {
  grid-template-columns: repeat(2, 1fr);
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  font-weight: 500;
  line-height: 1.2;
  text-align: center;
  padding: 12px 24px;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  min-height: 48px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-on-accent);
  border: 1px solid transparent;
}

.btn-primary:hover {
  background: var(--color-link);
}

.btn-secondary {
  background: transparent;
  color: var(--color-heading);
  border: 1px solid var(--color-heading);
}

.btn-secondary:hover {
  background: rgba(31, 41, 55, 0.06);
}

.btn-block {
  width: 100%;
}

.result {
  margin-top: 48px;
}

.verdict {
  margin-bottom: 24px;
}

.verdict .label {
  font-size: var(--font-size-label);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-heading);
  opacity: 0.72;
  margin-right: 8px;
}

.verdict .value {
  font-family: var(--font-heading);
  font-size: var(--font-size-h3);
  font-weight: 600;
}

.positive { color: var(--color-positive); }
.negative { color: var(--color-negative); }

.risk-low,
.profitable { color: var(--color-positive); font-weight: 600; }

.risk-high,
.not-profitable { color: var(--color-negative); font-weight: 600; }

details {
  border-top: 1px solid var(--color-heading);
  padding: 16px 0;
}

details summary {
  font-family: var(--font-heading);
  font-size: var(--font-size-h3);
  font-weight: 600;
  color: var(--color-heading);
  cursor: pointer;
  margin-bottom: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: var(--font-size-body);
}

th {
  font-size: var(--font-size-label);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-align: left;
  color: var(--color-heading);
  padding: 8px 12px 8px 0;
  border-bottom: 1px solid var(--color-heading);
}

td {
  padding: 8px 12px 8px 0;
  border-bottom: 1px solid rgba(31, 41, 55, 0.2);
}

.shap-explainer {
  font-size: var(--font-size-label);
  color: var(--color-heading);
  opacity: 0.8;
  max-width: 60ch;
}

.shap-tooltip {
  position: relative;
  cursor: help;
  border-bottom: 1px dotted currentColor;
}

.shap-tooltip::after {
  content: attr(data-tip);
  position: absolute;
  bottom: 130%;
  left: 0;
  z-index: 10;
  white-space: nowrap;
  background: var(--color-heading);
  color: var(--color-bg);
  font-size: 12px;
  line-height: 1.4;
  padding: 6px 10px;
  border-radius: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.shap-tooltip:hover::after,
.shap-tooltip:focus::after {
  opacity: 1;
}

.shap-bar-track {
  position: relative;
  height: 6px;
  margin-top: 6px;
  width: 100%;
  background: rgba(31, 41, 55, 0.12);
  border-radius: 3px;
  overflow: hidden;
}

.shap-bar-fill {
  position: absolute;
  top: 0;
  bottom: 0;
  border-radius: 3px;
}

.shap-bar-fill.left {
  right: 50%;
  background: var(--color-positive);
}

.shap-bar-fill.right {
  left: 50%;
  background: var(--color-negative);
}

#report h1, #report h2, #report h3 { margin-top: 24px; }
#report p { margin-bottom: var(--paragraph-gap); }
#report ul, #report ol { margin-bottom: var(--paragraph-gap); }
#report li { margin-bottom: 6px; }

.warning-banner {
  background: rgba(234, 88, 12, 0.08);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 24px 0;
  color: var(--color-text);
}

.warning-banner strong { color: var(--color-link); }

.notice {
  border: 1px solid var(--color-negative);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 24px 0;
  color: var(--color-negative);
}

.site-footer {
  margin-top: var(--section-space-desktop);
  padding-top: 24px;
  border-top: 1px solid rgba(31, 41, 55, 0.2);
  font-size: 13px;
  color: var(--color-text);
  opacity: 0.72;
}

@media (max-width: 640px) {
  :root {
    --section-space-desktop: var(--section-space-mobile);
  }

  h1 { font-size: 32px; }

  .wordmark { margin-bottom: 40px; }

  .form-grid,
  .form-grid.two {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .btn {
    width: 100%;
  }

  .page { padding: 0 16px 40px; }
}