:root {
  color-scheme: light;
  --ink: #151713;
  --ink-soft: #5d625a;
  --muted: #7a8176;
  --paper: #f6f7f4;
  --paper-deep: #e7ebe2;
  --surface: #ffffff;
  --surface-2: #eef1ea;
  --line: #d7dbd2;
  --line-strong: #aeb6a9;
  --accent: #116466;
  --accent-strong: #0b4445;
  --accent-soft: #d9ece8;
  --gold: #d89a32;
  --blue: #2e5f83;
  --danger: #b3261e;
  --shadow: 0 18px 46px rgba(21, 23, 19, 0.1);
  --radius: 8px;
  --radius-sm: 4px;
  --max: 1180px;
  --font-body: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-display: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(21, 23, 19, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, rgba(21, 23, 19, 0.026) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  line-height: 1.5;
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

img,
svg {
  max-width: 100%;
}

button,
input,
select {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(16px, 4vw, 42px);
  border-bottom: 1px solid rgba(215, 219, 210, 0.94);
  background: rgba(246, 247, 244, 0.94);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 700;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.top-nav a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  text-decoration: none;
}

.top-nav a:hover,
.top-nav a[aria-current="page"] {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
}

main {
  width: 100%;
}

.hero,
.section,
.content-shell {
  width: min(var(--max), calc(100% - 32px));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
  gap: clamp(22px, 4vw, 46px);
  padding: clamp(34px, 6vw, 70px) 0 34px;
}

.hero > * {
  min-width: 0;
}

.hero-compact {
  align-items: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--ink);
  letter-spacing: 0;
  line-height: 1.05;
}

h1,
.hero h2 {
  font-family: var(--font-display);
  font-weight: 850;
}

h1 {
  max-width: 760px;
  font-size: clamp(2.05rem, 4.4vw, 4.25rem);
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h2 {
  font-size: clamp(1.7rem, 3vw, 3rem);
}

h3 {
  font-size: 1.08rem;
}

.hero-text {
  max-width: 650px;
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.02rem, 1.7vw, 1.24rem);
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 10px 15px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
}

.button.primary {
  border-color: var(--accent-strong);
  background: var(--accent);
  color: #fff;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.hero-stats li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-weight: 750;
}

.button.ghost {
  background: rgba(255, 255, 255, 0.55);
}

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

.hero-panel,
.calculator-card,
.result-panel,
.directory-card,
.text-panel,
.toc-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.hero-panel {
  padding: 24px;
  border-top: 5px solid var(--accent);
}

.hero-panel h2 {
  margin-top: 8px;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
}

.hero-panel p {
  color: var(--ink-soft);
}

.panel-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-scientific {
  overflow: hidden;
  min-width: 0;
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.scientific-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 12px 14px;
  background: var(--surface-2);
}

.scientific-head h2 {
  font-size: 1.05rem;
  line-height: 1.1;
}

.angle-toggle {
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
}

.angle-toggle button {
  min-height: 28px;
  border: 0;
  padding: 4px 9px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 0.73rem;
  font-weight: 850;
  cursor: pointer;
}

.angle-toggle button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.scientific-display {
  display: grid;
  gap: 6px;
  padding: 16px 14px;
  background: var(--ink);
  color: var(--paper);
}

.scientific-expression,
.scientific-result {
  display: block;
  min-width: 0;
  overflow: hidden;
  font-family: var(--font-mono);
  text-align: right;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scientific-expression {
  min-height: 20px;
  color: rgba(246, 247, 244, 0.68);
  font-size: 0.92rem;
}

.scientific-result {
  min-height: 42px;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1;
}

.scientific-keys {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.scientific-keys button {
  min-width: 0;
  min-height: 48px;
  border: 0;
  padding: 0 4px;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.98rem;
  font-weight: 800;
  cursor: pointer;
}

.scientific-keys button:hover {
  background: var(--accent-soft);
}

.scientific-keys .function {
  background: #f1f4ee;
  color: var(--accent-strong);
}

.scientific-keys .operator {
  background: #e8f1ef;
  color: var(--accent-strong);
}

.scientific-keys .danger {
  background: #fbefed;
  color: var(--danger);
}

.scientific-keys .equals {
  background: var(--accent);
  color: #fff;
}

.section {
  padding: 42px 0 68px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.directory-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.directory-card {
  min-height: 260px;
  padding: 18px;
  box-shadow: none;
}

.directory-card h3 {
  margin-bottom: 12px;
}

.tool-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tool-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

.tool-list a[aria-disabled="true"] {
  color: var(--ink-soft);
  text-decoration: none;
  cursor: default;
}

.tool-list span {
  color: var(--muted);
  font-size: 0.78rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  width: min(var(--max), calc(100% - 32px));
  margin: 14px auto 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 7px;
  color: var(--muted);
}

.tool-intro {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  width: min(var(--max), calc(100% - 32px));
  margin: 8px auto 10px;
  padding: 8px 0 4px;
}

.tool-intro h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.2vw, 3.05rem);
  line-height: 1;
}

.tool-intro p:not(.eyebrow) {
  max-width: 640px;
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-size: 0.96rem;
}

.quick-jump {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.quick-jump a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 11px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 750;
  text-decoration: none;
}

.quick-jump a:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.calculator-layout {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(0, 1.1fr);
  gap: 14px;
  align-items: start;
  width: min(var(--max), calc(100% - 32px));
  margin: 8px auto 34px;
}

.calculator-card {
  overflow: hidden;
  box-shadow: none;
}

.card-header {
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  background: var(--surface-2);
}

.card-header h2 {
  font-size: 1.25rem;
}

.card-header p {
  margin: 5px 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 14px;
}

.field {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.field-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.field label {
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 750;
}

.segmented-control {
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.segmented-control input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
}

.segmented-control label {
  display: grid;
  min-width: 32px;
  min-height: 24px;
  place-items: center;
  padding: 2px 8px;
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 850;
  cursor: pointer;
}

.segmented-control input:checked + label {
  background: var(--ink);
  color: var(--paper);
}

.input-wrap {
  display: flex;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.input-wrap span {
  display: grid;
  min-width: 36px;
  place-items: center;
  border-right: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink-soft);
  font-weight: 750;
}

.input-wrap span.suffix {
  border-right: 0;
  border-left: 1px solid var(--line);
}

.input-wrap input,
.input-wrap select {
  width: 100%;
  min-height: 38px;
  border: 0;
  padding: 8px 10px;
  background: transparent;
  color: var(--ink);
  outline: 0;
}

textarea {
  width: 100%;
  min-height: 180px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 12px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  resize: vertical;
}

.input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 122, 108, 0.16);
}

.field-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.35;
}

.advanced-fields {
  grid-column: 1 / -1;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(245, 240, 232, 0.64);
}

.advanced-fields summary {
  min-height: 38px;
  padding: 9px 12px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
  cursor: pointer;
}

.advanced-fields[open] summary {
  border-bottom: 1px solid var(--line);
}

.advanced-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
}

.form-grid > .button {
  grid-column: 1 / -1;
  min-height: 40px;
}

.suite-layout {
  grid-template-columns: minmax(340px, 0.82fr) minmax(0, 1.18fr);
}

.suite-form-grid {
  align-items: end;
}

.suite-wide {
  grid-column: 1 / -1;
}

.check-field {
  display: flex;
  min-height: 38px;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  background: rgba(245, 240, 232, 0.64);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 750;
}

.check-field input {
  width: 16px;
  height: 16px;
}

.suite-result .result-number {
  font-family: var(--font-body);
  font-size: clamp(1.9rem, 3.4vw, 3.1rem);
  overflow-wrap: anywhere;
}

.result-panel {
  position: sticky;
  top: 74px;
  overflow: hidden;
  box-shadow: none;
}

.result-hero {
  display: grid;
  gap: 5px;
  padding: 16px 18px;
  background: var(--ink);
  color: var(--paper);
}

.result-hero p {
  margin: 0;
  color: rgba(251, 250, 247, 0.72);
  font-size: 0.9rem;
  font-weight: 750;
}

.result-number {
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 4.4vw, 3.55rem);
  line-height: 1;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

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

.metric {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 12px;
}

.metric:nth-child(2n) {
  border-right: 0;
}

.result-grid.three .metric:nth-child(2n) {
  border-right: 1px solid var(--line);
}

.result-grid.three .metric:nth-child(3n) {
  border-right: 0;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 750;
  text-transform: uppercase;
}

.metric strong {
  display: block;
  margin-top: 3px;
  font-size: 1.08rem;
}

.breakdown {
  padding: 14px;
}

.breakdown h2 {
  font-size: 1.25rem;
}

.bars {
  display: grid;
  gap: 7px;
  margin-top: 10px;
}

.bar-row {
  display: grid;
  grid-template-columns: 112px 1fr minmax(76px, max-content);
  gap: 10px;
  align-items: center;
  font-size: 0.84rem;
}

.bar-track {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--paper-deep);
}

.bar-fill {
  width: var(--bar-width, 0%);
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
}

.bar-fill.tax {
  background: var(--gold);
}

.bar-fill.insurance {
  background: var(--blue);
}

.bar-fill.pmi {
  background: #8e5f9f;
}

.bar-fill.hoa {
  background: #6b745b;
}

.bar-fill.extra {
  background: #a65234;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--line);
  padding: 8px 7px;
  text-align: right;
  white-space: nowrap;
}

.data-table th:first-child,
.data-table td:first-child {
  text-align: left;
}

.data-table th {
  color: var(--ink-soft);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.table-wrap {
  max-width: 100%;
  overflow-x: auto;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 20px;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto 70px;
}

.content-grid > * {
  min-width: 0;
}

.text-panel {
  min-width: 0;
  padding: clamp(20px, 4vw, 34px);
  box-shadow: none;
}

.text-panel + .text-panel {
  margin-top: 16px;
}

.text-panel p,
.text-panel li {
  color: var(--ink-soft);
}

.text-panel h2,
.text-panel h3 {
  margin-bottom: 10px;
}

.formula {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px;
  background: var(--surface-2);
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.toc-panel {
  position: sticky;
  top: 82px;
  padding: 18px;
  box-shadow: none;
}

.toc-panel ul {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding: 28px clamp(16px, 4vw, 42px);
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.62);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-nav {
    justify-content: flex-start;
  }

  .hero,
  .tool-intro,
  .calculator-layout,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .tool-intro {
    display: grid;
    align-items: start;
  }

  .quick-jump {
    justify-content: flex-start;
  }

  .result-panel {
    position: static;
  }

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

  .toc-panel {
    position: static;
  }
}

@media (max-width: 620px) {
  .site-header {
    align-items: center;
    flex-direction: row;
    gap: 8px;
    padding: 10px 12px;
  }

  .brand {
    flex: 0 0 auto;
  }

  .brand span:last-child {
    display: none;
  }

  .top-nav {
    width: auto;
    flex: 1 1 auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
  }

  .top-nav::-webkit-scrollbar {
    display: none;
  }

  .breadcrumb {
    display: none;
  }

  .hero,
  .tool-intro,
  .section,
  .content-shell,
  .calculator-layout,
  .content-grid,
  .breadcrumb {
    width: min(100% - 24px, var(--max));
  }

  .hero {
    gap: 22px;
    padding-top: 34px;
  }

  h1 {
    font-size: clamp(1.85rem, 8.3vw, 2.35rem);
    line-height: 1.12;
  }

  .hero-text {
    font-size: 0.98rem;
  }

  .hero-actions .button {
    flex: 1 1 100%;
  }

  .scientific-head {
    padding: 10px;
  }

  .scientific-head h2 {
    font-size: 0.98rem;
  }

  .angle-toggle button {
    min-height: 26px;
    padding-inline: 7px;
    font-size: 0.68rem;
  }

  .scientific-display {
    padding: 14px 10px;
  }

  .scientific-expression {
    font-size: 0.78rem;
  }

  .scientific-result {
    font-size: clamp(1.65rem, 9vw, 2.3rem);
  }

  .scientific-keys button {
    min-height: 49px;
    font-size: 0.82rem;
  }

  .tool-intro {
    margin-top: 12px;
  }

  .tool-intro h1 {
    font-size: clamp(1.8rem, 9vw, 2.35rem);
  }

  .tool-intro p:not(.eyebrow) {
    font-size: 0.92rem;
  }

  .quick-jump {
    display: none;
  }

  .directory-grid,
  .result-grid,
  .result-grid.three {
    grid-template-columns: 1fr;
  }

  .form-grid,
  .advanced-grid {
    grid-template-columns: 1fr;
  }

  .metric {
    border-right: 0;
  }

  .result-grid.three .metric:nth-child(2n),
  .result-grid.three .metric:nth-child(3n) {
    border-right: 0;
  }

  .bar-row {
    grid-template-columns: 96px 1fr minmax(72px, max-content);
    gap: 8px;
  }

  .top-nav a {
    padding-inline: 10px;
  }
}