:root {
  color-scheme: light;
  --ink: #1d2939;
  --muted: #667085;
  --soft-muted: #98a2b3;
  --line: #e4e7ec;
  --surface: #ffffff;
  --canvas: #f4f7f8;
  --navy: #17324d;
  --navy-dark: #10263a;
  --teal: #2a9d8f;
  --teal-soft: #e6f5f2;
  --orange: #e07a5f;
  --orange-soft: #fff0eb;
  --yellow-soft: #fff8e7;
  --yellow-line: #f4cf73;
  --danger: #c2413a;
  --shadow: 0 14px 38px rgba(20, 48, 73, 0.08);
  --chart-panel-height: min(calc(100vh - 32px), 860px);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--canvas);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 0%, rgba(42, 157, 143, 0.1), transparent 30rem),
    var(--canvas);
  font-family:
    Inter, "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
#comparison-chart:focus-visible {
  outline: 3px solid rgba(42, 157, 143, 0.35);
  outline-offset: 2px;
}

.app-shell {
  width: min(1480px, calc(100% - 48px));
  margin: 0 auto;
  padding: 42px 0 52px;
}

.workspace {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  /* The chart area spans every row because a sticky grid item can only move
     within its own grid area. */
  grid-template-areas:
    "intro chart"
    "main chart";
  column-gap: 24px;
  align-items: start;
}

.workspace-intro {
  grid-area: intro;
  min-width: 0;
}

.workspace-main {
  grid-area: main;
  min-width: 0;
}

.workspace-chart {
  position: sticky;
  top: 16px;
  grid-area: chart;
  min-width: 0;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 24px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 8px;
  color: var(--teal);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 14px;
  color: var(--navy-dark);
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.045em;
  line-height: 1.08;
}

h2 {
  margin-bottom: 0;
  color: var(--navy-dark);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

h3 {
  margin-bottom: 4px;
  color: var(--navy-dark);
  font-size: 1.1rem;
}

.hero-copy {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1rem;
}

.hero-mark {
  position: relative;
  flex: 0 0 124px;
  width: 124px;
  height: 124px;
  overflow: hidden;
  border: 1px solid rgba(42, 157, 143, 0.28);
  border-radius: 34px;
  background: linear-gradient(145deg, var(--navy), #28516f);
  box-shadow: 0 18px 32px rgba(23, 50, 77, 0.18);
}

.hero-mark::before,
.hero-mark::after {
  position: absolute;
  content: "";
}

.hero-mark::before {
  right: -18px;
  bottom: -26px;
  width: 96px;
  height: 96px;
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 50%;
}

.hero-mark::after {
  top: 20px;
  left: 23px;
  width: 60px;
  height: 46px;
  border: 5px solid #ffffff;
  border-top: 0;
  transform: skewY(-8deg);
}

.hero-mark-house {
  position: absolute;
  top: 27px;
  left: 26px;
  z-index: 1;
  width: 54px;
  height: 35px;
  border: 5px solid #ffffff;
  border-bottom: 0;
  transform: rotate(45deg) scale(0.72);
}

.hero-mark-chart {
  position: absolute;
  right: 19px;
  bottom: 22px;
  width: 43px;
  height: 28px;
  border-top: 4px solid #9be3d6;
  border-right: 4px solid #9be3d6;
  transform: skewY(-24deg) rotate(-18deg);
}

.notice {
  margin-bottom: 26px;
  padding: 14px 18px;
  border: 1px solid var(--yellow-line);
  border-radius: 14px;
  color: #6b5318;
  background: var(--yellow-soft);
  font-size: 0.9rem;
}

.profile-panel {
  margin-bottom: 18px;
  padding: 20px;
  border: 1px solid rgba(42, 157, 143, 0.24);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 8px 24px rgba(20, 48, 73, 0.045);
}

.profile-heading {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.profile-heading .section-kicker {
  margin-bottom: 4px;
}

.profile-heading p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.profile-groups {
  display: grid;
  gap: 14px;
}

.profile-group-title {
  margin: 0 0 8px;
  color: var(--navy-dark);
  font-size: 0.74rem;
  font-weight: 700;
}

.profile-source {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.6;
}

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

.profile-button {
  display: grid;
  min-height: 78px;
  gap: 6px;
  padding: 12px 13px;
  border: 1px solid #d0d5dd;
  border-radius: 12px;
  color: #344054;
  background: #ffffff;
  text-align: left;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.profile-button:hover {
  border-color: var(--teal);
  transform: translateY(-1px);
}

.profile-button.active {
  border-color: var(--teal);
  background: var(--teal-soft);
  box-shadow: 0 0 0 3px rgba(42, 157, 143, 0.1);
}

.profile-button strong {
  color: var(--navy-dark);
  font-size: 0.8rem;
}

.profile-button small {
  color: var(--muted);
  font-size: 0.7rem;
}

.comparison-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.comparison-part {
  min-width: 0;
  padding: 18px;
  border: 1px solid rgba(228, 231, 236, 0.92);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
}

.comparison-part-buy {
  border-color: rgba(224, 122, 95, 0.28);
}

.comparison-part-rent {
  border-color: rgba(42, 157, 143, 0.28);
}

.comparison-part-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  margin: 2px 4px 16px;
}

.comparison-part-heading .section-kicker {
  margin-bottom: 4px;
}

.comparison-part-heading p:last-child {
  max-width: 220px;
  margin: 0;
  color: var(--muted);
  font-size: 0.74rem;
  text-align: right;
}

.part-panels {
  display: grid;
  gap: 16px;
}

.panel {
  border: 1px solid rgba(228, 231, 236, 0.92);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.part-panels .panel {
  padding: 22px;
}

.panel-heading,
.section-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.panel-heading {
  margin-bottom: 22px;
}

.panel-heading .section-kicker {
  margin-bottom: 4px;
}

.panel-icon {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 11px;
  color: var(--teal);
  background: var(--teal-soft);
  font-size: 1.25rem;
  font-weight: 800;
}

.field-grid {
  display: grid;
  gap: 16px;
}

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

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

.field {
  min-width: 0;
}

.field label,
.table-switch span {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 7px;
  color: #344054;
  font-size: 0.82rem;
  font-weight: 700;
}

input,
select {
  width: 100%;
  min-height: 43px;
  border: 1px solid #d0d5dd;
  border-radius: 10px;
  color: var(--ink);
  background: #ffffff;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease;
}

input {
  padding: 9px 11px;
}

select {
  padding: 9px 32px 9px 11px;
}

input:hover,
select:hover {
  border-color: #98a2b3;
}

input:focus,
select:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 4px rgba(42, 157, 143, 0.12);
  outline: 0;
}

input:disabled,
select:disabled {
  cursor: not-allowed;
  color: var(--soft-muted);
  background: #f2f4f7;
}

.range-control {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 43px;
}

.range-control input[type="range"] {
  flex: 1 1 auto;
  width: auto;
  min-width: 0;
  min-height: 7px;
  height: 7px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--teal-soft), #d0d5dd);
  box-shadow: none;
  accent-color: var(--teal);
  appearance: none;
}

.range-control input[type="range"]:hover {
  border-color: transparent;
}

.range-control input[type="range"]:focus {
  border-color: transparent;
  box-shadow: none;
  outline: 0;
}

.range-control input[type="range"]::-webkit-slider-thumb {
  width: 20px;
  height: 20px;
  border: 3px solid #ffffff;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 2px 8px rgba(23, 50, 77, 0.2);
  cursor: grab;
  appearance: none;
}

.range-control input[type="range"]::-webkit-slider-thumb:active {
  cursor: grabbing;
}

.range-control input[type="range"]::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border: 3px solid #ffffff;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 2px 8px rgba(23, 50, 77, 0.2);
  cursor: grab;
}

.range-control input[type="range"]:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.range-control output {
  flex: 0 0 auto;
  min-width: 88px;
  color: var(--navy-dark);
  font-size: 0.82rem;
  font-weight: 750;
  text-align: right;
  white-space: nowrap;
}

.range-control input[type="range"]:disabled + output {
  color: var(--soft-muted);
}

.input-with-unit {
  position: relative;
}

.input-with-unit input {
  padding-right: 74px;
}

.input-with-unit span {
  position: absolute;
  top: 50%;
  right: 11px;
  color: var(--soft-muted);
  font-size: 0.75rem;
  pointer-events: none;
  transform: translateY(-50%);
}

.field-hint,
.field-error,
.summary-card small,
.panel-subtitle {
  font-size: 0.72rem;
}

.field-hint {
  min-height: 18px;
  margin: 5px 0 0;
  color: var(--soft-muted);
}

.rent-model-hint {
  padding: 10px 12px;
  border: 1px solid rgba(42, 157, 143, 0.2);
  border-radius: 10px;
  color: #317b72;
  background: var(--teal-soft);
}

.field-error {
  min-height: 18px;
  margin: 4px 0 0;
  color: var(--danger);
}

.hidden {
  display: none !important;
}

.form-actions {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 10px;
  margin: 20px 0 42px;
}

.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.button {
  min-height: 42px;
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 0.83rem;
  font-weight: 750;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

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

.button-primary {
  color: #ffffff;
  background: var(--navy);
  box-shadow: 0 7px 16px rgba(23, 50, 77, 0.18);
}

.button-primary:hover {
  background: var(--navy-dark);
}

.button-secondary {
  border-color: #d0d5dd;
  color: #344054;
  background: #ffffff;
}

.button-secondary:hover {
  background: #f8fafc;
}

.form-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.results-section {
  display: grid;
  gap: 18px;
}

.section-title-row {
  align-items: end;
}

.section-title-row.compact {
  align-items: center;
  margin-bottom: 18px;
}

.section-title-row .section-kicker {
  margin-bottom: 5px;
}

.results-section > .section-title-row {
  align-items: flex-start;
  flex-direction: column;
  gap: 6px;
}

.result-caption,
.panel-subtitle {
  margin: 0;
  color: var(--muted);
}

.result-caption {
  font-size: 0.83rem;
}

.result-groups {
  display: grid;
  gap: 16px;
}

.result-group {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.76);
}

.result-group-buy {
  border-top: 4px solid var(--orange);
}

.result-group-investment {
  border-top: 4px solid var(--teal);
}

.result-group-compare {
  border-top: 4px solid var(--navy);
}

.result-group-heading {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.result-group-heading .section-kicker {
  margin-bottom: 4px;
}

.result-group-heading h3 {
  margin: 0;
  color: var(--navy-dark);
  font-size: 1.15rem;
}

.result-group-heading p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

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

.summary-card {
  min-height: 128px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(20, 48, 73, 0.045);
}

.summary-card-house {
  border-color: rgba(224, 122, 95, 0.35);
  background: linear-gradient(145deg, #ffffff, var(--orange-soft));
}

.summary-card-investment {
  border-color: rgba(42, 157, 143, 0.35);
  background: linear-gradient(145deg, #ffffff, var(--teal-soft));
}

.summary-card-difference {
  background: #f9fafb;
}

.summary-card-wide {
  grid-column: 1 / -1;
  min-height: 0;
}

.break-even-list {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-left: 18px;
  font-size: 0.8rem;
  line-height: 1.5;
}

.summary-label {
  display: block;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.summary-value {
  display: block;
  color: var(--navy-dark);
  font-size: clamp(1.14rem, 2vw, 1.62rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
  text-wrap: balance;
}

.summary-card small {
  display: block;
  margin-top: 9px;
  color: var(--muted);
  line-height: 1.45;
}

.summary-value.positive,
.chart-key-value.positive {
  color: var(--teal);
}

.summary-value.negative,
.chart-key-value.negative {
  color: var(--orange);
}

.summary-value.neutral,
.chart-key-value.neutral {
  color: #667085;
}

.chart-panel,
.detail-panel {
  padding: 22px;
}

.chart-panel {
  display: flex;
  flex-direction: column;
  height: var(--chart-panel-height);
}

.detail-panel {
  margin-top: 24px;
}

.chart-key-figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.chart-key-figure {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f9fafb;
}

.chart-key-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.chart-key-value {
  display: block;
  margin-top: 4px;
  color: var(--navy-dark);
  font-size: 1.12rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.legend-dot {
  display: inline-block;
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.legend-dot.house {
  background: var(--orange);
}

.legend-dot.investment {
  background: var(--teal);
}

.chart-frame {
  position: relative;
  flex: 1 1 auto;
  min-height: 120px;
  overflow: hidden;
  border: 1px solid #eef0f2;
  border-radius: 13px;
  background:
    linear-gradient(180deg, rgba(248, 250, 252, 0.75), #ffffff),
    #ffffff;
}

#comparison-chart {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.chart-grid-line {
  stroke: #e8edf0;
  stroke-dasharray: 4 5;
  stroke-width: 1;
}

.chart-zero-line {
  stroke: #c3cad3;
  stroke-dasharray: none;
}

.chart-year-line {
  stroke: #c3cad3;
  stroke-dasharray: 4 4;
  stroke-width: 1;
}

.chart-year-tick {
  stroke: #c3cad3;
  stroke-width: 1;
}

.chart-axis-label {
  fill: #98a2b3;
  font-size: 11px;
  text-anchor: end;
}

.chart-axis-label-x {
  text-anchor: middle;
}

.chart-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3;
}

.chart-line-house {
  filter: drop-shadow(0 3px 3px rgba(224, 122, 95, 0.18));
}

.chart-line-investment {
  filter: drop-shadow(0 3px 3px rgba(42, 157, 143, 0.18));
}

.chart-hover {
  display: none;
  pointer-events: none;
}

.chart-hover.active {
  display: inline;
}

.chart-guide {
  stroke: #98a2b3;
  stroke-dasharray: 3 4;
  stroke-width: 1;
}

.chart-marker {
  stroke: #ffffff;
  stroke-width: 2;
}

.chart-empty {
  fill: #98a2b3;
  font-size: 14px;
  text-anchor: middle;
}

.chart-tooltip {
  position: absolute;
  z-index: 2;
  display: grid;
  min-width: 180px;
  gap: 3px;
  padding: 10px 12px;
  border: 1px solid rgba(23, 50, 77, 0.12);
  border-radius: 10px;
  color: #ffffff;
  background: rgba(16, 38, 58, 0.95);
  box-shadow: 0 10px 24px rgba(16, 38, 58, 0.18);
  font-size: 0.72rem;
  pointer-events: none;
}

.chart-tooltip[hidden] {
  display: none;
}

.chart-tooltip strong {
  margin-bottom: 3px;
  font-size: 0.78rem;
}

.table-switch {
  display: flex;
  align-items: center;
  gap: 9px;
}

.table-switch span {
  margin: 0;
  white-space: nowrap;
}

.table-switch select {
  min-height: 36px;
  padding-top: 6px;
  padding-bottom: 6px;
  font-size: 0.78rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid #eef0f2;
  border-radius: 12px;
}

table {
  width: 100%;
  min-width: 1280px;
  border-collapse: collapse;
  font-size: 0.78rem;
}

th,
td {
  padding: 12px 13px;
  border-bottom: 1px solid #eef0f2;
  white-space: nowrap;
  text-align: right;
}

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

th {
  color: #667085;
  background: #f8fafc;
  font-size: 0.72rem;
  font-weight: 750;
}

td {
  color: #344054;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover td {
  background: #fbfdfd;
}

.table-empty {
  padding: 28px;
  color: var(--soft-muted);
  text-align: center !important;
}

.footer-note {
  margin-top: 22px;
  padding: 16px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 1179px) {
  :root {
    --chart-panel-height: clamp(260px, 45vh, 440px);
  }

  html {
    scroll-padding-top: calc(var(--chart-panel-height) + 24px);
  }

  /* A flex column keeps the whole workspace as the sticky chart's containing
     block; as a grid item it would be limited to its own row. */
  .workspace {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .workspace-intro {
    order: 1;
  }

  .workspace-chart {
    order: 2;
    top: 0;
    z-index: 5;
    margin-bottom: 18px;
    padding: 8px 0;
    background: var(--canvas);
  }

  .workspace-main {
    order: 3;
  }

  .chart-panel {
    padding: 14px;
  }

  .chart-panel .section-title-row {
    display: none;
  }

  .chart-key-figures {
    gap: 8px;
    margin-bottom: 10px;
  }

  .chart-key-figure {
    padding: 8px 10px;
  }
}

@media (max-width: 1050px) {
  .part-panels .panel {
    padding: 20px;
  }
}

@media (max-width: 680px) {
  :root {
    --chart-panel-height: clamp(240px, 42vh, 360px);
  }

  .app-shell {
    width: min(100% - 22px, 1480px);
    padding-top: 24px;
  }

  .hero {
    align-items: flex-start;
  }

  .hero-mark {
    flex-basis: 76px;
    width: 76px;
    height: 76px;
    border-radius: 22px;
    transform: scale(0.82);
    transform-origin: top right;
  }

  .hero-mark::after {
    top: 15px;
    left: 16px;
    width: 40px;
    height: 30px;
    border-width: 4px;
  }

  .hero-mark-house {
    top: 19px;
    left: 18px;
    width: 38px;
    height: 26px;
    border-width: 4px;
  }

  .hero-mark-chart {
    right: 12px;
    bottom: 13px;
    width: 29px;
    height: 20px;
  }

  .two-columns {
    grid-template-columns: 1fr;
  }

  .profile-buttons {
    grid-template-columns: 1fr;
  }

  .comparison-part {
    padding: 14px;
  }

  .comparison-part-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .comparison-part-heading p:last-child {
    max-width: none;
    text-align: left;
  }

  .section-title-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .summary-grid {
    grid-template-columns: 1fr;
  }

  .result-group {
    padding: 16px;
  }

  .chart-panel {
    padding: 10px;
  }

  .detail-panel {
    padding: 16px;
  }

  .chart-key-figures {
    gap: 6px;
    margin-bottom: 8px;
  }

  .chart-key-figure {
    padding: 6px 8px;
  }

  .chart-key-label {
    gap: 4px;
    font-size: 0.64rem;
  }

  .chart-key-value {
    font-size: 0.8rem;
  }

  .table-switch {
    align-self: stretch;
    justify-content: space-between;
  }
}