.site-header {
  position: relative;
  z-index: 20;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 76%, transparent);
  background: rgba(245, 240, 230, .92);
  backdrop-filter: blur(16px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.75rem;
  gap: var(--space-3);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .72rem;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  width: 2.15rem;
  aspect-ratio: 1;
  place-items: center;
  color: var(--paper);
  background: var(--forest);
  border-radius: 50% 50% 44% 56%;
  font-size: .78rem;
  letter-spacing: .08em;
}

.nav-toggle {
  display: inline-grid;
  width: 2.75rem;
  aspect-ratio: 1;
  padding: .65rem;
  border: 1px solid var(--border);
  color: var(--ink);
  background: var(--white);
  border-radius: 999px;
  place-content: center;
  cursor: pointer;
}

.nav-toggle::before,
.nav-toggle::after {
  width: 1.2rem;
  height: 2px;
  margin: .14rem 0;
  background: currentColor;
  content: "";
}

.site-nav {
  position: absolute;
  top: calc(100% + .5rem);
  right: 1rem;
  left: 1rem;
  display: none;
  padding: var(--space-3);
  border: 1px solid var(--border);
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.site-nav[data-open="true"] {
  display: block;
}

.site-nav ul {
  display: grid;
  gap: .25rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.site-nav a {
  display: block;
  padding: .65rem .8rem;
  color: var(--ink);
  border-radius: .6rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--forest);
  background: var(--paper-deep);
}

.hero {
  padding-block: clamp(2.5rem, 7vw, 6rem) var(--space-5);
}

.hero__grid {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}

.hero__copy {
  position: relative;
}

.hero h1 {
  max-width: 12ch;
  margin-bottom: var(--space-4);
}

.hero__image-frame {
  position: relative;
  overflow: hidden;
  margin: 0;
  background: var(--paper-deep);
  border-radius: clamp(1rem, 3vw, 2.5rem) clamp(1rem, 3vw, 2.5rem) .5rem clamp(1rem, 3vw, 2.5rem);
  box-shadow: var(--shadow);
  isolation: isolate;
}

.hero__image-frame::after {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  width: 3.4rem;
  aspect-ratio: 1;
  border: 1px solid rgba(255, 253, 248, .65);
  border-radius: 50%;
  content: "";
}

.hero__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.hero__caption {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  max-width: 24rem;
  padding: .65rem .8rem;
  margin: 0;
  color: var(--white);
  background: rgba(24, 48, 42, .78);
  border-radius: .6rem;
  font-size: var(--step--1);
  backdrop-filter: blur(7px);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem;
  margin-block: var(--space-4);
}

.button {
  display: inline-flex;
  min-height: 2.9rem;
  align-items: center;
  justify-content: center;
  padding: .72rem 1.15rem;
  border: 1px solid var(--forest);
  color: var(--white);
  background: var(--forest);
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  color: var(--white);
  background: var(--terracotta);
  border-color: var(--terracotta);
}

.button--quiet {
  color: var(--forest);
  background: transparent;
}

.invite-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .65rem;
  padding: .7rem .85rem;
  border: 1px dashed var(--brass);
  background: rgba(255, 253, 248, .66);
  border-radius: .8rem;
}

.invite-copy code {
  padding: .18rem .45rem;
  color: var(--forest);
  background: var(--paper-deep);
  border-radius: .3rem;
  font-size: 1.05rem;
  font-weight: 800;
}

.invite-copy button {
  padding: .42rem .75rem;
  border: 0;
  color: var(--white);
  background: var(--caspian);
  border-radius: 999px;
  font-size: var(--step--1);
  font-weight: 800;
  cursor: pointer;
}

.invite-copy button:hover,
.invite-copy button:focus-visible {
  background: var(--forest);
}

.hero__content-link {
  margin: var(--space-3) 0 0;
  font-size: var(--step--1);
  font-weight: 800;
}

.hero__content-link a {
  color: var(--forest);
}

.hero__content-link a:hover {
  color: var(--caspian);
}

.disclosure {
  margin: var(--space-3) 0 0;
  color: var(--muted);
  font-size: .76rem;
  line-height: 1.45;
}

.source-strip {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.source-strip__label {
  margin: 0;
  color: var(--terracotta);
  font-size: var(--step--1);
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.source-strip ul {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.source-strip li {
  padding: .35rem .7rem;
  border: 1px solid var(--border);
  background: var(--white);
  border-radius: 999px;
  color: var(--muted);
  font-size: var(--step--1);
}

.section-heading {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.section-heading h2,
.section-heading p {
  margin-bottom: 0;
}

.article-grid,
.evidence-grid {
  display: grid;
  gap: var(--space-4);
}

.article-card {
  overflow: hidden;
  color: var(--ink);
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(24, 48, 42, .08);
}

.article-card__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.article-card__body {
  padding: var(--space-4);
}

.article-card__meta {
  color: var(--terracotta);
  font-size: var(--step--1);
  font-weight: 800;
}

.article-card h3 {
  margin-bottom: .7rem;
  font-size: var(--step-2);
}

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

.viewpoint-matrix {
  overflow-x: auto;
  border: 1px solid var(--border);
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(24, 48, 42, .06);
}

.viewpoint-matrix table {
  width: 100%;
  min-width: 42rem;
  border-collapse: collapse;
}

.viewpoint-matrix caption {
  padding: var(--space-4);
  color: var(--muted);
  text-align: left;
}

.viewpoint-matrix th,
.viewpoint-matrix td {
  padding: .9rem 1rem;
  border-top: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.viewpoint-matrix thead th {
  color: var(--white);
  background: var(--forest);
  border-top: 0;
}

.evidence-card {
  padding: var(--space-4);
  border-top: .3rem solid var(--brass);
  background: var(--white);
  border-radius: .4rem var(--radius) var(--radius) var(--radius);
}

.evidence-card__number {
  display: block;
  margin-bottom: var(--space-3);
  color: var(--caspian);
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-weight: 700;
  line-height: 1;
}

.tool-form {
  display: grid;
  gap: var(--space-3);
  max-width: 42rem;
  padding: var(--space-4);
  border: 1px solid var(--border);
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.tool-form label {
  display: grid;
  gap: .4rem;
  font-weight: 800;
}

.tool-form input,
.tool-form select {
  width: 100%;
  min-height: 3rem;
  padding: .65rem .75rem;
  border: 1px solid var(--border);
  color: var(--ink);
  background: var(--paper);
  border-radius: .6rem;
}

.tool-form__result {
  min-height: 3.6rem;
  padding: .8rem;
  margin: 0;
  color: var(--forest);
  background: var(--paper-deep);
  border-radius: .6rem;
}

.site-footer {
  padding-block: var(--space-5);
  color: var(--paper-deep);
  background: var(--ink);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-3);
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer a {
  color: var(--white);
}

.site-footer :focus-visible {
  outline-color: var(--white);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: block;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
  }

  .site-nav ul {
    display: flex;
    align-items: center;
  }

  .hero__grid {
    grid-template-columns: minmax(0, 55fr) minmax(0, 45fr);
  }

  .source-strip {
    grid-template-columns: auto 1fr;
    align-items: center;
  }

  .section-heading {
    grid-template-columns: minmax(0, .9fr) minmax(20rem, 1.1fr);
    align-items: end;
  }

  .article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .evidence-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .site-footer__inner {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
}
.tool-card-grid,.form-grid,.calculator-layout,.tool-copy{display:grid;gap:var(--space-4)}
.tool-card,.formula-card,.tool-note,.disclaimer-panel{padding:var(--space-4);border:1px solid var(--border);background:var(--white);border-radius:var(--radius)}
.tool-card{box-shadow:0 12px 32px rgba(24,48,42,.07)}
.tool-card__number{color:var(--terracotta);font-weight:800}
.field-group{display:grid;gap:.4rem}
.field-error{margin:0;color:#8d2f24;font-size:var(--step--1);font-weight:700}
.field-error:empty,.calculator-status:empty,.tool-form__result:empty{display:none}
.tool-form [aria-invalid="true"]{border-color:#8d2f24;box-shadow:0 0 0 2px rgba(141,47,36,.16)}
.choice-fieldset{min-width:0;padding:var(--space-3);border:1px solid var(--border);border-radius:.8rem}
.choice-grid,.source-choice-grid{display:grid;gap:.6rem}
.choice{display:flex;align-items:center;gap:.5rem}
.tool-form .choice input{width:1.2rem;min-height:1.2rem;margin:0}
.tool-form .choice label{display:inline}
.form-actions{display:flex;flex-wrap:wrap;gap:.75rem}
.tool-form__result{overflow-x:auto}
.tool-form__result table{width:100%;min-width:38rem;border-collapse:collapse}
.tool-form__result th,.tool-form__result td{padding:.65rem;border-bottom:1px solid var(--border);text-align:left}
@media(min-width:640px){.form-grid,.source-choice-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.choice-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(min-width:768px){.tool-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}


@media (min-width: 768px) and (max-width: 899px) {
  .nav-toggle {
    display: inline-grid;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + .5rem);
    right: 1rem;
    left: 1rem;
    display: none;
    padding: .6rem;
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

  .site-nav[data-open="true"] {
    display: block;
  }

  .site-nav ul {
    display: grid;
    align-items: initial;
  }
}