/* MortCalc — responsive, accessible baseline */
:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --accent: #0157FF;
  --accent-hover: #0157FF;
  --accent-subtle: rgba(1, 87, 255, 0.1);
  --radius: 12px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
  --nav-pill-shadow: 0 2px 14px rgba(15, 23, 42, 0.07);
  --nav-tab-inactive: #475569;
  --nav-tab-active-bg: #dbeafe;
  --nav-tab-active-border: #93c5fd;
  --nav-tab-active-text: #0c4a6e;
  --font: "DM Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --space: 1rem;
  --max: 1040px;
}

@supports (width: min(10px, 20px)) {
  :root {
    --max: min(1040px, 100% - 2rem);
  }
}

@supports (font-size: clamp(1rem, 2vw, 2rem)) {
  :root {
    --space: clamp(1rem, 3vw, 1.5rem);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 999;
  padding: 0.75rem 1rem;
  background: var(--text);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  left: var(--space);
  top: var(--space);
}

.wrap {
  width: var(--max);
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  margin-inline: auto;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-left: max(1rem, constant(safe-area-inset-left));
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, constant(safe-area-inset-right));
  padding-right: max(1rem, env(safe-area-inset-right));
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: var(--space) 0;
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem 1rem;
}

.site-header__brand {
  flex: 1;
  min-width: 0;
}

.logo {
  margin: 0;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.calc-site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
  padding: 0.45rem 0.55rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 9999px;
  box-shadow: var(--nav-pill-shadow);
}

.calc-site-nav__link {
  font-size: clamp(0.8rem, 1.65vw, 0.9375rem);
  font-weight: 700;
  color: var(--nav-tab-inactive);
  text-decoration: none;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.calc-site-nav__link:hover {
  color: #334155;
  background: rgba(15, 23, 42, 0.045);
}

.calc-site-nav__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.calc-site-nav__link[aria-current="page"] {
  color: var(--nav-tab-active-text);
  background: var(--nav-tab-active-bg);
  border-color: var(--nav-tab-active-border);
}

.calc-site-nav__link[aria-current="page"]:hover {
  color: var(--nav-tab-active-text);
  background: var(--nav-tab-active-bg);
}

.calc-site-nav-backdrop {
  display: none;
}

.calc-site-nav__links {
  display: contents;
}

.calc-site-nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.75rem;
  height: 2.75rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  touch-action: manipulation;
}

.calc-site-nav__toggle:hover {
  background: rgba(15, 23, 42, 0.04);
}

.calc-site-nav__toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.calc-site-nav__toggle-bars {
  position: relative;
  display: block;
  width: 1.15rem;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: background 0.2s ease;
}

.calc-site-nav__toggle-bars::before,
.calc-site-nav__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.2s ease, top 0.2s ease;
}

.calc-site-nav__toggle-bars::before {
  top: -6px;
}

.calc-site-nav__toggle-bars::after {
  top: 6px;
}

body.site-nav-open .calc-site-nav__toggle-bars {
  background: transparent;
}

body.site-nav-open .calc-site-nav__toggle-bars::before {
  top: 0;
  transform: rotate(45deg);
}

body.site-nav-open .calc-site-nav__toggle-bars::after {
  top: 0;
  transform: rotate(-45deg);
}

body.site-nav-lock {
  overflow: hidden;
}

@media (max-width: 719px) {
  .calc-site-nav {
    display: contents;
    margin-bottom: 0;
    padding: 0;
    border: none;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  body.site-nav-open .site-header {
    position: relative;
    z-index: 85;
  }

  .calc-site-nav__toggle {
    display: flex;
    flex-shrink: 0;
  }

  .calc-site-nav__links {
    display: none;
    margin: 0;
  }

  body.site-nav-open .calc-site-nav__links {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    position: fixed;
    left: max(1rem, env(safe-area-inset-left));
    right: max(1rem, env(safe-area-inset-right));
    top: max(5rem, calc(env(safe-area-inset-top) + 3.75rem));
    z-index: 90;
    max-height: min(calc(100dvh - 7rem), 22rem);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0.65rem 0.55rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) + 2px);
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.18);
  }

  body.site-nav-open .calc-site-nav__links .calc-site-nav__link {
    display: block;
    white-space: normal;
    text-align: left;
    width: 100%;
  }

  .calc-site-nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 84;
    margin: 0;
    padding: 0;
    border: none;
    background: rgba(15, 23, 42, 0.4);
    cursor: pointer;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    touch-action: manipulation;
  }

  .calc-site-nav-backdrop[hidden] {
    display: none !important;
  }
}

@media (min-width: 720px) {
  body.site-nav-lock {
    overflow: unset;
  }
}

main {
  flex: 1;
  padding: 1.5rem 0;
  padding: clamp(1.5rem, 5vw, 3rem) 0;
}

.calc-tabs {
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.5vw, 1.35rem);
}

.calc-tabs-nav {
  display: none;
  align-items: center;
  gap: 0.75rem;
  padding: 0.1rem 0;
}

.tab-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.75rem;
  height: 2.75rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  touch-action: manipulation;
}

.tab-nav-toggle:hover {
  background: rgba(15, 23, 42, 0.04);
}

.tab-nav-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tab-nav-toggle__bars {
  position: relative;
  display: block;
  width: 1.15rem;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: background 0.2s ease;
}

.tab-nav-toggle__bars::before,
.tab-nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.2s ease, top 0.2s ease;
}

.tab-nav-toggle__bars::before {
  top: -6px;
}

.tab-nav-toggle__bars::after {
  top: 6px;
}

.calc-tabs.is-tab-nav-open .tab-nav-toggle__bars {
  background: transparent;
}

.calc-tabs.is-tab-nav-open .tab-nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}

.calc-tabs.is-tab-nav-open .tab-nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.tab-nav-current {
  margin: 0;
  flex: 1;
  min-width: 0;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--text);
}

.tablist-backdrop {
  display: none;
}

body.tab-nav-lock {
  overflow: hidden;
}

@media (max-width: 719px) {
  .calc-tabs-nav {
    display: flex;
  }

  .tablist-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 80;
    margin: 0;
    padding: 0;
    border: none;
    background: rgba(15, 23, 42, 0.4);
    cursor: pointer;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    touch-action: manipulation;
  }

  .tablist-backdrop[hidden] {
    display: none !important;
  }

  .tablist-scroll {
    display: none;
    margin: 0;
    overflow: visible;
    overscroll-behavior: auto;
  }

  .calc-tabs.is-tab-nav-open .tablist-scroll {
    display: block;
    position: fixed;
    left: max(1rem, env(safe-area-inset-left));
    right: max(1rem, env(safe-area-inset-right));
    top: max(6.5rem, calc(env(safe-area-inset-top) + 4.75rem));
    z-index: 90;
    max-height: min(calc(100dvh - 7rem), 420px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: calc(var(--radius) + 2px);
  }

  .calc-tabs.is-tab-nav-open .tablist {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0.35rem;
    min-width: 0;
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.18);
  }

  .calc-tabs.is-tab-nav-open .tab {
    flex: 0 0 auto;
    white-space: normal;
    text-align: left;
    width: 100%;
  }
}

@media (min-width: 720px) {
  .tablist-backdrop {
    display: none !important;
  }

  body.tab-nav-lock {
    overflow: unset;
  }
}

.calculator-tab {
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.25vw, 1.35rem);
}

.calculator-tab__header {
  margin: 0;
}

.calculator-tab__title {
  margin: 0;
  padding: 0 0 0.15rem;
  font-size: 1.28rem;
  font-size: clamp(1.15rem, 2.85vw, 1.52rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.calculator-seo-copy {
  margin-top: clamp(0.25rem, 1vw, 0.5rem);
  padding: clamp(1.1rem, 2.75vw, 1.65rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.calculator-seo-copy__title {
  margin: 0 0 0.65rem;
  font-size: clamp(1.05rem, 2.15vw, 1.22rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text);
}

.calculator-seo-copy p {
  margin: 0 0 0.9rem;
  font-size: 0.96rem;
  line-height: 1.68;
  color: var(--text);
}

.calculator-seo-copy p:last-child {
  margin-bottom: 0;
}

.calculator-seo-copy ul {
  margin: 0 0 0.9rem;
  padding-left: 1.2rem;
  line-height: 1.68;
  color: var(--text);
}

.calculator-seo-copy li {
  margin-bottom: 0.3rem;
}

.calculator-seo-copy li:last-child {
  margin-bottom: 0;
}

.calculator-faq {
  margin-top: clamp(0.25rem, 1vw, 0.5rem);
  padding: clamp(1.1rem, 2.75vw, 1.65rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.calculator-faq__title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.05rem, 2.15vw, 1.22rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text);
}

.calculator-faq__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.calculator-faq__item {
  border-top: 1px solid var(--border);
}

.calculator-faq__item:last-child {
  border-bottom: 1px solid var(--border);
}

.calculator-faq__question {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.72rem 0;
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

.calculator-faq__question::-webkit-details-marker,
.calculator-faq__question::marker {
  display: none;
}

.calculator-faq__question::after {
  content: "";
  flex-shrink: 0;
  width: 0.5rem;
  height: 0.5rem;
  margin-top: 0.2rem;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform 0.15s ease;
}

.calculator-faq__item[open] .calculator-faq__question::after {
  transform: rotate(-135deg);
  margin-top: 0.35rem;
}

.calculator-faq__question:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.calculator-faq__answer {
  padding: 0 0 0.85rem;
}

.calculator-faq__answer p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.65;
  color: var(--text);
  opacity: 0.92;
}

.tablist-scroll {
  margin: 0 -0.25rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-gutter: stable;
}

.tablist-scroll::-webkit-scrollbar {
  height: 6px;
}

.tablist-scroll::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.tablist {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.35rem;
  padding: 0.25rem;
  border-radius: calc(var(--radius) + 2px);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  min-width: min-content;
}

.tab {
  flex: 1 1 auto;
  white-space: nowrap;
  margin: 0;
  padding: 0.55rem 0.85rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.8rem;
  font-size: clamp(0.75rem, 1.85vw, 0.85rem);
  line-height: 1.35;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  touch-action: manipulation;
}

.tab:hover {
  color: var(--text);
  background: rgba(15, 23, 42, 0.04);
}

.tab[aria-selected="true"] {
  color: var(--accent-hover);
  background: var(--accent-subtle);
  border-color: rgba(1, 87, 255, 0.25);
}

.tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tabpanel:not([hidden]) {
  outline: none;
}

@media (max-width: 680px) {
  .tab {
    flex: 0 0 auto;
  }

  .tablist {
    flex-wrap: nowrap;
  }
}

.amort-comparison-wrap {
  margin: 0 0 1.15rem;
  border-radius: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid rgba(1, 87, 255, 0.45);
}

.amort-comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.amort-comparison-table thead {
  background: #0157FF;
  color: #ffffff;
}

.amort-comparison-table thead th {
  margin: 0;
  padding: 0.78rem 0.85rem;
  font-weight: 600;
  text-align: center;
  vertical-align: middle;
  letter-spacing: 0.01em;
  border-bottom: none;
}

.amort-comparison-table thead th.amort-comparison-table__corner {
  width: 38%;
}

.amort-comparison-table tbody tr {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.amort-comparison-table tbody tr:last-child {
  border-bottom: none;
}

.amort-comparison-table tbody th {
  margin: 0;
  padding: 0.72rem 0.95rem;
  font-weight: 500;
  text-align: left;
  vertical-align: middle;
  color: var(--text);
  border-right: none;
}

.amort-comparison-table tbody td {
  margin: 0;
  padding: 0.72rem 0.85rem;
  font-family: var(--mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  text-align: center;
  vertical-align: middle;
  color: var(--text);
}

.amort-schedule-details {
  margin-bottom: 0.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fafbfc;
  overflow: hidden;
}

.amort-schedule-details__summary {
  padding: 0.75rem 1rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  list-style: none;
}

.amort-schedule-details__summary::-webkit-details-marker {
  display: none;
}

.amort-schedule-details__summary::after {
  content: "";
  display: inline-block;
  margin-left: 0.35rem;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  vertical-align: 0.1rem;
}

.amort-schedule-details[open] .amort-schedule-details__summary::after {
  transform: rotate(-135deg);
  vertical-align: 0;
}

.amort-schedule-details__summary:focus {
  outline: none;
}

.amort-schedule-details__summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.amort-schedule-details .amort-table-wrap {
  margin: 0;
  border-radius: 0;
  border: none;
  border-top: 1px solid var(--border);
}

.layout--amort .panel--amort-results {
  grid-column: 1 / -1;
}

@media (min-width: 840px) {
  .layout--amort .panel--amort-results {
    grid-column: auto;
  }
}

.panel--compare-form fieldset:first-of-type {
  margin-bottom: 0.25rem;
}

.compare-fieldset {
  margin: 0;
  padding: 0;
  padding-bottom: 1rem;
  border: none;
  border-bottom: 1px solid var(--border);
}

.compare-fieldset:last-of-type {
  border-bottom: none;
  padding-bottom: 0.25rem;
}

.compare-legend {
  padding: 0;
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.compare-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

@media (max-width: 640px) {
  .compare-columns {
    grid-template-columns: 1fr;
  }
}

.compare-card {
  padding: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fafbfc;
}

.compare-card-title {
  margin: 0 0 0.65rem;
  font-size: 0.92rem;
  font-weight: 700;
}

.stats--compact {
  gap: 0.55rem;
}

.stats--compact .stat {
  padding-bottom: 0.55rem;
}

.result-highlight--compare {
  margin-top: 0.25rem;
}

.amort-table-wrap {
  max-height: min(380px, 55vh);
  overflow: auto;
  margin: 0 0 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.amort-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.amort-table th,
.amort-table td {
  padding: 0.45rem 0.55rem;
  text-align: right;
  border-bottom: 1px solid var(--border);
}

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

.amort-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface);
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.amort-table tbody tr:nth-child(even) {
  background: #fafbfc;
}

.amort-table td {
  font-family: var(--mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.hero {
  margin-bottom: 1.5rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.lead {
  margin: 0;
  max-width: 52ch;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-size: clamp(0.95rem, 2.2vw, 1.05rem);
}

.layout {
  display: grid;
  gap: 1.25rem;
  gap: clamp(1.25rem, 3vw, 2rem);
}

@media (min-width: 840px) {
  .layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.panel {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.field-group {
  margin: 0;
  padding: 0;
  border: none;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.field-group-legend {
  padding: 0;
  margin: 0 0 0.15rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.optional-accordion {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fafbfc;
  overflow: hidden;
}

.optional-accordion__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.optional-accordion__summary::-webkit-details-marker {
  display: none;
}

.optional-accordion__title {
  flex: 1;
  min-width: 0;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.optional-accordion__chevron {
  flex-shrink: 0;
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  margin-top: 0.1rem;
}

.optional-accordion[open] .optional-accordion__chevron {
  transform: rotate(-135deg);
  margin-top: 0.35rem;
}

.optional-accordion__hint {
  flex: 1 1 100%;
  margin: 0;
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--text-muted);
}

.optional-accordion__summary:focus {
  outline: none;
}

.optional-accordion__summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

.optional-accordion__body {
  padding: 0 1rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.optional-accordion__body .field-group {
  padding-top: 1rem;
}

.field label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.field-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1rem;
  align-items: end;
}

@media (max-width: 520px) {
  .field-split {
    grid-template-columns: 1fr;
  }
}

.field-split__col .input-row.input-row--suffix input {
  border-radius: 8px 0 0 8px;
}

.field input,
.field select {
  width: 100%;
  font: inherit;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fafbfc;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
  background: var(--surface);
}

.input-row {
  display: flex;
  align-items: stretch;
}

.input-row .input-prefix,
.input-row .input-suffix {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  padding: 0 0.65rem;
  background: var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--border);
}

.input-row .input-prefix {
  border-radius: 8px 0 0 8px;
  border-right: none;
}

.input-row input {
  border-radius: 0;
  flex: 1;
  min-width: 0;
}

.input-row input:first-child:not(:only-child) {
  border-radius: 0 8px 8px 0;
}

.input-row.input-row--prefix input {
  border-left: none;
  border-radius: 0 8px 8px 0;
}

.input-row.input-row--suffix input {
  border-radius: 8px 0 0 8px;
  border-right: none;
}

.input-row .input-suffix {
  border-radius: 0 8px 8px 0;
  border-left: none;
}

.hint {
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.btn-primary {
  margin-top: 0.35rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 0.85rem 1.25rem;
  background: var(--accent);
  color: #fff;
  transition: background 0.15s, transform 0.08s;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  touch-action: manipulation;
}

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

.btn-primary:active {
  transform: scale(0.98);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.form-error {
  margin: 0;
  padding: 0.65rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: #b91c1c;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 8px;
}

.form-error[hidden] {
  display: none !important;
}

.results-title {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.result-highlight-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1rem 1.5rem;
  margin-bottom: 1.25rem;
}

.result-highlight-row .result-highlight {
  flex: 1 1 11rem;
  margin-bottom: 0;
  min-width: 0;
}

.result-payment-chart {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.25rem 0;
  margin-left: auto;
}

.result-payment-chart__title {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-align: center;
}

.result-payment-chart__canvas-wrap {
  position: relative;
  width: min(182px, 100%);
  aspect-ratio: 1;
  max-width: 100%;
}

.result-payment-chart__canvas-wrap canvas {
  display: block;
}

@media (max-width: 479px) {
  .result-payment-chart {
    margin-left: 0;
    width: 100%;
    max-width: 228px;
    margin-right: auto;
  }
}

.result-highlight {
  background: linear-gradient(135deg, var(--accent-subtle), transparent);
  border: 1px solid rgba(1, 87, 255, 0.2);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  margin-bottom: 1.25rem;
}

.result-label {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.result-value {
  margin: 0.35rem 0 0;
  font-family: var(--mono);
  font-size: 1.75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 500;
  color: var(--accent-hover);
  letter-spacing: -0.02em;
}

.result-sub {
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.result-sub--muted {
  margin-top: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  opacity: 0.92;
}

.stats {
  margin: 0;
  display: grid;
  gap: 0.85rem;
}

.stat {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border);
}

.stat:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat dt {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 500;
  text-align: right;
}

.disclaimer {
  margin: 1.25rem 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.site-footer {
  margin-top: auto;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.site-footer p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn-primary {
    transition: none;
  }

  .btn-primary:active {
    transform: none;
  }

  .optional-accordion__chevron {
    transition: none;
  }

  .tab-nav-toggle__bars,
  .tab-nav-toggle__bars::before,
  .tab-nav-toggle__bars::after,
  .calc-site-nav__toggle-bars,
  .calc-site-nav__toggle-bars::before,
  .calc-site-nav__toggle-bars::after {
    transition: none;
  }
}