:root {
  --page-background: #f7f5ef;
  --card-background: #ffffff;
  --dark-background: #111827;

  --text-primary: #1f2933;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --text-light: #d1d5db;

  --border-color: #e5e1d8;
  --input-border: #d8d3c8;

  --accent: #f59e0b;
  --accent-hover: #d97706;

  --container-width: 1100px;
  --content-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page-background);
  color: var(--text-primary);
  font-family: Inter, Arial, sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

a {
  color: inherit;
}

.site-header {
  background: rgba(247, 245, 239, 0.94);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.site-header__inner {
  max-width: var(--container-width);
  min-height: 72px;
  margin: 0 auto;
  padding: 0 20px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-logo {
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.03em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-nav a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--text-primary);
}

.calculator-page {
  padding: 56px 20px 72px;
}

.calculator-wrap {
  max-width: var(--container-width);
  margin: 0 auto;
}

.breadcrumbs {
  margin-bottom: 24px;
  color: var(--text-muted);
  font-size: 14px;
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--text-primary);
}

.calculator-header {
  max-width: var(--content-width);
  margin-bottom: 32px;
}

.calculator-header__eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  color: #92400e;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.calculator-header h1 {
  margin: 0 0 16px;
  font-size: clamp(38px, 6vw, 58px);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.calculator-header p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1.65;
}

.calculator-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 24px;
  align-items: start;
}

.calculator-card,
.info-card {
  background: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  box-shadow: 0 10px 28px rgba(20, 20, 20, 0.06);
}

.calculator-card {
  padding: 28px;
}

.info-card {
  padding: 24px;
}

.info-card + .info-card {
  margin-top: 18px;
}

.info-card h2,
.info-card h3 {
  margin: 0 0 12px;
  letter-spacing: -0.025em;
}

.info-card h2 {
  font-size: 22px;
}

.info-card h3 {
  font-size: 18px;
}

.info-card p,
.info-card li {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

.info-card p:last-child {
  margin-bottom: 0;
}

.info-card ul {
  margin: 0;
  padding-left: 20px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  min-width: 0;
}

.field--full {
  grid-column: 1 / -1;
}

.field label {
  display: block;
  margin-bottom: 7px;
  color: #374151;
  font-size: 13px;
  font-weight: 700;
}

.field-hint {
  display: block;
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.4;
}

.field input,
.field select {
  width: 100%;
  min-height: 48px;
  padding: 12px 13px;

  background: #fff;
  border: 1px solid var(--input-border);
  border-radius: 12px;

  color: var(--text-primary);
  font-size: 16px;
  outline: none;

  transition:
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.field input:focus,
.field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.15);
}

.field input:invalid {
  border-color: #dc2626;
}

.calculator-result {
  margin-top: 22px;
  padding: 22px;

  background: var(--dark-background);
  border-radius: 18px;
  color: #fff;
}

.calculator-result small {
  display: block;
  margin-bottom: 6px;
  color: #cbd5e1;
  font-size: 13px;
}

.calculator-result strong {
  display: block;
  font-size: clamp(34px, 6vw, 48px);
  line-height: 1;
  letter-spacing: -0.05em;
}

.calculator-result p {
  margin: 12px 0 0;
  color: var(--text-light);
  font-size: 13px;
  line-height: 1.55;
}

.calculator-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.breakdown-item {
  padding: 14px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 12px;
}

.breakdown-item small {
  margin-bottom: 5px;
  color: #cbd5e1;
}

.breakdown-item span {
  display: block;
  font-size: 16px;
  font-weight: 700;
}

.cta-box {
  max-width: var(--container-width);
  margin: 32px auto 0;
  padding: 32px;

  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;

  background: var(--dark-background);
  border-radius: 26px;
  color: #fff;
}

.cta-box__content {
  max-width: 660px;
}

.cta-box h2 {
  margin: 0 0 8px;
  font-size: 28px;
  letter-spacing: -0.035em;
}

.cta-box p {
  margin: 0;
  color: var(--text-light);
  line-height: 1.55;
}

.button {
  display: inline-block;
  padding: 14px 20px;

  background: var(--accent);
  border: 0;
  border-radius: 999px;

  color: var(--dark-background);
  cursor: pointer;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;

  transition:
    background 160ms ease,
    transform 160ms ease;
}

.button:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.tools-directory {
  padding: 56px 20px 72px;
}

.tools-directory__wrap {
  max-width: var(--container-width);
  margin: 0 auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 20px;
}

.tool-link-card {
  display: flex;
  min-height: 240px;
  padding: 24px;
  flex-direction: column;

  background: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  box-shadow: 0 10px 28px rgba(20, 20, 20, 0.06);

  text-decoration: none;

  transition:
    transform 160ms ease,
    box-shadow 160ms ease;
}

.tool-link-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 36px rgba(20, 20, 20, 0.1);
}

.tool-link-card h2 {
  margin: 0 0 10px;
  font-size: 22px;
  letter-spacing: -0.025em;
}

.tool-link-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.tool-link-card__action {
  margin-top: auto;
  padding-top: 24px;
  color: #92400e;
  font-size: 14px;
  font-weight: 800;
}

.site-footer {
  padding: 32px 20px;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 13px;
}

.site-footer__inner {
  max-width: var(--container-width);
  margin: 0 auto;
}

@media (max-width: 800px) {
  .calculator-layout {
    grid-template-columns: 1fr;
  }

  .calculator-sidebar {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .info-card + .info-card {
    margin-top: 0;
  }
}

@media (max-width: 600px) {
  .site-nav {
    display: none;
  }

  .calculator-page,
  .tools-directory {
    padding-top: 40px;
  }

  .calculator-card {
    padding: 20px;
  }

  .form-grid,
  .calculator-sidebar,
  .calculator-breakdown {
    grid-template-columns: 1fr;
  }

  .cta-box {
    padding: 24px;
  }

  .button {
    width: 100%;
    text-align: center;
  }
}