:root {
  color-scheme: light;
  --forest: #064E3B;
  --forest-deep: #043F2F;
  --sage: #D8EBDD;
  --sage-soft: #e8f4ec;
  --paper: #FAFAF7;
  --card: #FFFFFF;
  --ink: #172B26;
  --muted: #5a6f66;
  --line: #d7e3dc;
  --line-strong: #c2d2c8;
  --warn: #8b3a1c;
  --shadow: 0 22px 50px rgba(6, 78, 59, 0.12);
  --shadow-soft: 0 10px 28px rgba(23, 43, 38, 0.08);
  --radius: 1.25rem;
  --radius-sm: 0.8rem;
  --radius-pill: 999px;
  --max: 74rem;
  --font: "Manrope", "Avenir Next", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font);
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.55;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  transform: translateY(-160%);
  background: #fff;
  color: var(--forest);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  z-index: 40;
  font-weight: 700;
}

.skip:focus { transform: none; }

/* ——— Top bar ——— */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(250, 250, 247, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(6, 78, 59, 0.06);
}

.topbar-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.9rem 1.35rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--forest);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  min-width: 0;
}

.brand span { white-space: nowrap; }
.brand-mark { color: var(--forest); flex: 0 0 auto; }

.primary-nav {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 1.4rem;
}

.primary-nav a {
  color: var(--forest);
  text-decoration: none;
  font-weight: 650;
  font-size: 0.95rem;
  padding-bottom: 0.2rem;
  border-bottom: 2px solid transparent;
}

.primary-nav a[aria-current="page"],
.primary-nav a:hover { border-bottom-color: var(--forest); }

.btn-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-pill);
  background: var(--forest);
  color: #fff !important;
  text-decoration: none;
  font-weight: 750;
  font-size: 0.92rem;
  white-space: nowrap;
  box-shadow: 0 8px 18px rgba(6, 78, 59, 0.18);
}

.btn-pill:hover { background: var(--forest-deep); }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.35rem 3.75rem;
}

/* ——— Hero ——— */
.hero {
  display: grid;
  gap: 1.5rem;
  padding: 1.75rem 0 1.25rem;
  align-items: start;
}

.badge {
  display: inline-flex;
  align-items: center;
  margin: 0 0 1rem;
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-pill);
  background: var(--sage);
  color: var(--forest);
  font-size: 0.84rem;
  font-weight: 750;
}

h1 {
  margin: 0 0 0.85rem;
  color: var(--forest);
  font-size: clamp(2.35rem, 5.8vw, 3.6rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.lede {
  margin: 0 0 1.5rem;
  max-width: 34rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.18rem);
}

.calc-card {
  background: var(--card);
  border: 1px solid rgba(6, 78, 59, 0.07);
  border-radius: 1.35rem;
  box-shadow: var(--shadow);
  padding: 1.45rem 1.4rem 1.35rem;
}

.card-title {
  margin: 0 0 1.15rem;
  color: var(--ink);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* Mockup-simple fields */
.simple-fields {
  display: grid;
  gap: 0.95rem;
}

.simple-field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink);
}

.simple-label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.field-icon { color: var(--forest); flex: 0 0 auto; }

.simple-field input {
  min-height: 3.15rem;
  font-size: 1.05rem;
  font-weight: 500;
  border-radius: 0.85rem;
  border: 1px solid var(--line-strong);
  padding: 0.65rem 0.9rem;
  background: #fff;
  width: 100%;
}

.simple-field input::placeholder { color: #9aaca3; }

.measure-hero .pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
}

.advanced-only { display: none !important; }

.show-advanced .advanced-only { display: revert !important; }

.show-advanced .wall-name-field,
.show-advanced .inch-field {
  display: flex !important;
  flex-direction: column;
  gap: 0.25rem;
}

.show-advanced #walls .wall:not(.wall-hero) { display: block; }

#walls .wall:not(.wall-hero) { display: none; }

.wall-hero {
  border: none;
  background: transparent;
  padding: 0;
  margin: 0;
}

.btn-calculate,
button.primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  width: 100%;
  min-height: 3.4rem;
  margin-top: 0.15rem;
  background: var(--forest);
  color: #fff;
  border: 1px solid var(--forest);
  border-radius: var(--radius-pill);
  font-size: 1.05rem;
  font-weight: 800;
  box-shadow: 0 12px 24px rgba(6, 78, 59, 0.2);
  cursor: pointer;
}

.btn-calculate:hover,
button.primary:hover {
  background: var(--forest-deep);
  border-color: var(--forest-deep);
  color: #fff;
}

.actions-primary {
  display: block;
  margin-top: 1.15rem;
}

.trust-row {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 1.05rem 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

.trust-row li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 700;
  text-align: center;
}

.trust-icon {
  display: inline-grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 999px;
  background: transparent;
  color: var(--forest);
}

/* Result appears after calculate */
.result {
  background: linear-gradient(160deg, var(--forest) 0%, var(--forest-deep) 100%);
  color: #f4fbf7;
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin: 1.15rem 0 0;
}

.result.is-idle { display: none; }

.result.has-error,
.result.is-live { display: block; }

.result-label {
  margin: 0 0 0.2rem;
  color: var(--sage);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.course-percent {
  margin: 0 0 0.35rem;
  font-size: clamp(1.7rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: #fff;
}

.result p { margin: 0.3rem 0; }
#result-detail { color: #e5f3eb; font-size: 0.95rem; }

.result .disclaimer,
.result #result-errors {
  color: #c5dcd0;
  font-size: 0.88rem;
}

.result .disclaimer {
  margin-top: 0.65rem;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(216, 235, 221, 0.22);
}

.result #result-errors {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
  color: #f5d7c4;
}

.result.is-live { position: static; box-shadow: none; }

.more-options {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 0.15rem 0.9rem 0.85rem;
}

.more-options > summary {
  cursor: pointer;
  font-weight: 750;
  color: var(--forest);
  min-height: 2.85rem;
  display: flex;
  align-items: center;
}

.tool { background: transparent; border: none; padding: 0; margin: 0; }

label,
.field {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  font-size: 0.8rem;
  font-weight: 700;
}

.measure-caption {
  margin: 0.65rem 0 0.25rem;
  font-size: 0.92rem;
  font-weight: 750;
}

.hint,
.row-note,
footer { color: var(--muted); font-size: 0.92rem; }

.row-note[data-kind="warn"] { color: var(--warn); }

input,
button,
select {
  font: inherit;
  color: inherit;
  transition: border-color 150ms ease, background-color 150ms ease, box-shadow 150ms ease;
}

input,
select {
  font-size: 1rem;
  font-weight: 500;
  min-height: 2.9rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  width: 100%;
}

button {
  min-height: 2.85rem;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  border-color: var(--forest);
  background: var(--sage-soft);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.9rem;
}

.tool-links button {
  background: transparent;
  border-color: transparent;
  color: var(--forest);
  text-decoration: underline;
  text-underline-offset: 0.18em;
  min-height: 2.4rem;
  padding-left: 0;
}

.row-remove { align-self: end; }

fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: 0.9rem 0 0;
  padding: 0.9rem 0.95rem 1rem;
  background: rgba(250, 250, 247, 0.75);
}

legend {
  font-weight: 800;
  font-size: 1rem;
  padding: 0 0.3rem;
  color: var(--forest);
}

.pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
}

.direction {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.2rem;
  margin: 0.25rem 0 0.15rem;
}

.direction label {
  flex-direction: row;
  align-items: center;
  gap: 0.4rem;
  font-size: 1rem;
  font-weight: 650;
}

.direction input { width: auto; min-height: 1.15rem; }

.opening {
  margin-top: 0.7rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--line);
}

.unit-us .metric-only,
.unit-metric .us-only { display: none; }

.field { margin-top: 0.7rem; }

#allowances {
  margin-top: 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 0.2rem 0.85rem 0.85rem;
}

#allowances > summary {
  cursor: pointer;
  font-weight: 750;
  color: var(--forest);
  min-height: 2.6rem;
  display: flex;
  align-items: center;
}

/* Hero photo */
.hero-visual { min-width: 0; }

.hero-photo { display: block; width: 100%; }

.hero-photo img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 800;
  object-fit: cover;
  object-position: left center;
  border-radius: 1.5rem;
  box-shadow: var(--shadow-soft);
  background: var(--sage-soft);
}

a { color: var(--forest); }
a:hover { color: var(--forest-deep); }

:focus-visible {
  outline: 3px solid var(--forest);
  outline-offset: 2px;
}

/* Below-fold */
.section { margin-top: 3.25rem; }

.section > h2,
.prose > h2,
.faq > h2 {
  margin: 0 0 1.1rem;
  color: var(--forest);
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section h3,
.prose h3,
.faq h3,
.guide-block h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 800;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.steps > li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow-soft);
}

.step-num {
  display: inline-grid;
  place-items: center;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 999px;
  background: var(--sage);
  color: var(--forest);
  font-weight: 800;
}

.steps p { margin: 0.2rem 0 0; color: var(--muted); }

.feature-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.feature-card,
.guide-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem;
  box-shadow: var(--shadow-soft);
}

.feature-card p,
.guide-block p,
.prose p,
.faq p {
  margin: 0.5rem 0;
  color: var(--ink);
}

.feature-card p { color: var(--muted); margin-top: 0.35rem; }
.guide-block { margin: 0 0 0.9rem; }

.prose,
.faq { background: transparent; border: none; padding: 0; }

.prose ul { padding-left: 1.2rem; }
.breakdown-slot:empty { display: none; }

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem 1.35rem 2.5rem;
  border-top: 1px solid var(--line);
}

footer p { margin: 0; }

@media (min-width: 720px) {
  .primary-nav { display: flex; }
  .btn-pill { margin-left: 0; }

  .trust-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.35rem;
  }

  .pair { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .steps > li { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 980px) {
  .hero {
    grid-template-columns: minmax(19rem, 0.84fr) minmax(26rem, 1.16fr);
    gap: 1.25rem 1.75rem;
    align-items: start;
    padding-top: 2rem;
  }

  .hero-copy { position: relative; z-index: 2; }

  .calc-card {
    max-width: 25.5rem;
    margin-right: -4rem;
  }

  .hero-visual {
    position: sticky;
    top: 5.5rem;
    z-index: 1;
  }

  .hero-photo img {
    aspect-ratio: 1200 / 800;
    min-height: 28rem;
    max-height: min(80vh, 40rem);
    border-radius: 1.6rem;
    object-fit: cover;
    object-position: left center;
  }

  .feature-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 979px) {
  .hero-copy { order: 1; }
  .hero-visual { order: 2; }
  .hero-photo img { max-height: 26rem; }
}

@media (max-width: 719px) {
  .btn-pill { display: none; }
}

@media print {
  .topbar,
  .hero-visual,
  .trust-row,
  .more-options,
  .no-print,
  .skip,
  .how-to,
  .why { display: none !important; }

  body { background: #fff; }

  .calc-card { box-shadow: none; border: none; padding: 0; }

  .result,
  .result .disclaimer,
  .result #result-errors {
    background: #fff;
    color: #000;
  }

  .result.is-idle { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  input, button, select { transition: none; }
}