:root {
  --bg-color: #fcfbf9;
  --text-color: #2d2d2d;
  --accent-color: #0a4f6d;
  --secondary-accent: #ae2012;
  --muted-text: #666;
  --border-color: #dedbd4;
  --soft-blue: #edf6f8;
  --paper: #fff;
  --ink: #111;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.75;
  overflow-x: hidden;
}

.waterline {
  background: linear-gradient(180deg, rgba(10, 79, 109, 0.16), rgba(10, 79, 109, 0.07));
  bottom: 0;
  height: var(--water-fill, 0vh);
  left: 0;
  pointer-events: none;
  position: fixed;
  right: 0;
  transition: height 0.12s linear;
  z-index: -1;
}

.progress-container {
  position: fixed;
  inset: 0 0 auto 0;
  height: 4px;
  z-index: 1000;
}

.progress-bar {
  width: 0%;
  height: 100%;
  background: var(--accent-color);
}

h1,
h2,
h3,
h4,
label,
select,
button,
input,
footer,
.subtitle,
.publication-date,
.hero-metrics,
.chart-title,
.toolbar,
.result-grid,
.control-panel,
.callout {
  font-family: var(--font-sans);
}

h1,
h2,
h3,
h4 {
  color: var(--ink);
  font-weight: 750;
  line-height: 1.15;
}

h1 {
  max-width: 980px;
  font-size: 3rem;
  margin: 0 auto 1rem;
}

h2 {
  font-size: 2.4rem;
}

h3 {
  color: var(--accent-color);
  font-size: 1.55rem;
  margin-bottom: 1rem;
}

h4 {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.45rem;
  text-transform: uppercase;
}

p {
  margin-bottom: 1.35rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
  position: relative;
}

.hero-content {
  position: relative;
  width: min(980px, 100%);
  z-index: 1;
}

.drip-field {
  height: 150px;
  left: 50%;
  pointer-events: none;
  position: absolute;
  top: 1.5rem;
  transform: translateX(-50%);
  width: min(360px, calc(100vw - 3rem));
}

.drip {
  animation: drip 2.6s infinite ease-in;
  background: rgba(10, 79, 109, 0.48);
  border-radius: 70% 70% 80% 80%;
  height: 14px;
  position: absolute;
  left: 50%;
  top: 0;
  transform: rotate(45deg);
  width: 14px;
}

.drip-two {
  animation-delay: 1.3s;
  opacity: 0;
}

@keyframes drip {
  0% {
    opacity: 0;
    transform: translateY(-8px) rotate(45deg) scale(0.55);
  }
  18% {
    opacity: 0.85;
  }
  100% {
    opacity: 0;
    transform: translateY(66px) rotate(45deg) scale(0.85);
  }
}

.publication-date {
  display: block;
  color: var(--secondary-accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.subtitle {
  max-width: 760px;
  margin: 0 auto 2.5rem;
  color: var(--muted-text);
  font-size: 1.3rem;
  font-weight: 350;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--border-color);
}

.hero-metrics div {
  background: var(--paper);
  padding: 1.1rem;
}

.hero-metrics strong {
  display: block;
  color: var(--accent-color);
  font-size: 1.45rem;
  line-height: 1.1;
}

.hero-metrics span {
  color: var(--muted-text);
  display: block;
  font-size: 0.78rem;
  margin-top: 0.35rem;
  text-transform: uppercase;
}

.story-container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.era {
  display: grid;
  grid-template-columns: 1fr 2.1fr;
  gap: 4rem;
  margin-bottom: 7rem;
  opacity: 0.35;
  transform: translateY(14px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.era.active {
  opacity: 1;
  transform: translateY(0);
}

.era-marker {
  align-self: start;
  border-right: 2px solid var(--border-color);
  padding-right: 2rem;
  position: sticky;
  text-align: right;
  top: 18vh;
}

.era-title {
  color: var(--muted-text);
  font-style: italic;
  margin-top: 0.5rem;
}

.narrative {
  max-width: 820px;
}

.toolbar,
.builder-grid,
.card-comparison,
.result-grid {
  display: grid;
  gap: 1rem;
}

.toolbar {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 2rem 0 1rem;
}

label {
  color: var(--muted-text);
  display: grid;
  font-size: 0.78rem;
  font-weight: 700;
  gap: 0.45rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

select,
button,
input[type="range"] {
  width: 100%;
}

button,
select {
  appearance: none;
  background: var(--paper);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-color);
  font-size: 0.95rem;
  padding: 0.65rem 0.75rem;
}

button {
  cursor: pointer;
  font-weight: 750;
  text-align: center;
}

button:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.preset-tabs {
  background: #f3f0eb;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  display: grid;
  gap: 0.25rem;
  grid-column: 1 / -1;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  padding: 0.25rem;
}

.preset-tabs button {
  background: transparent;
  border-color: transparent;
  font-size: 0.78rem;
  line-height: 1.2;
  min-height: 3rem;
  padding: 0.45rem 0.5rem;
}

.preset-tabs button.active {
  background: #fff;
  border-color: rgba(10, 79, 109, 0.26);
  box-shadow: 0 1px 3px rgba(17, 17, 17, 0.08);
  color: var(--accent-color);
}

.preset-tabs button.jackson-tab.active {
  border-color: rgba(174, 32, 18, 0.32);
  color: var(--secondary-accent);
}

.builder-status {
  background: var(--soft-blue);
  border: 1px solid rgba(10, 79, 109, 0.22);
  color: var(--accent-color);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  padding: 0.55rem 0.7rem;
  text-align: center;
  text-transform: uppercase;
}

.builder-status.jackson {
  background: rgba(174, 32, 18, 0.08);
  border-color: rgba(174, 32, 18, 0.28);
  color: var(--secondary-accent);
}

.builder-status.ordinary {
  background: rgba(25, 115, 79, 0.08);
  border-color: rgba(25, 115, 79, 0.26);
  color: #19734f;
}

.builder-status.rebuild {
  background: rgba(189, 105, 16, 0.08);
  border-color: rgba(189, 105, 16, 0.28);
  color: #9c5a0f;
}

input[type="range"] {
  accent-color: var(--accent-color);
}

output {
  color: var(--text-color);
  font-size: 0.84rem;
  font-weight: 650;
  letter-spacing: 0;
  text-transform: none;
}

.chart-shell,
.card,
.control-panel,
.result-panel {
  background: var(--paper);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.025);
}

.chart-shell {
  margin: 1.5rem 0;
  padding: 1.25rem;
}

.chart-shell.compact {
  margin-bottom: 0;
}

.chart-title {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.chart-title span {
  color: var(--muted-text);
  font-size: 0.85rem;
}

.chart-note {
  align-items: center;
  color: var(--muted-text);
  display: flex;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  gap: 0.75rem;
  line-height: 1.45;
  margin: -0.35rem 0 0.9rem;
}

.chart-note::before {
  background: var(--secondary-accent);
  content: "";
  display: inline-block;
  flex: 0 0 auto;
  height: 1rem;
  opacity: 0.72;
  width: 2px;
}

.chart {
  min-height: 280px;
  position: relative;
}

.bar-row {
  align-items: center;
  display: grid;
  grid-template-columns: minmax(120px, 1.1fr) minmax(160px, 2fr) minmax(96px, 0.34fr);
  gap: 1rem;
  margin: 0.65rem 0;
}

.bar-label,
.bar-value,
.point-label {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  line-height: 1.25;
}

.bar-label {
  color: var(--text-color);
}

.bar-track {
  background: #edf0ef;
  border-right: 1px solid rgba(45, 45, 45, 0.08);
  height: 18px;
  position: relative;
}

.baseline-marker {
  background: var(--secondary-accent);
  bottom: -5px;
  opacity: 0.72;
  position: absolute;
  top: -5px;
  width: 2px;
}

.comparison-marker {
  background: var(--ink);
  bottom: -5px;
  opacity: 0.68;
  position: absolute;
  top: -5px;
  width: 2px;
}

.baseline-marker::after,
.comparison-marker::after {
  background: currentColor;
  border-radius: 999px;
  content: "";
  height: 6px;
  left: 50%;
  position: absolute;
  top: -7px;
  transform: translateX(-50%);
  width: 6px;
}

.baseline-marker {
  color: var(--secondary-accent);
}

.comparison-marker {
  color: var(--ink);
}

.bar-fill {
  background: var(--accent-color);
  height: 100%;
  min-width: 2px;
}

.bar-fill.warn {
  background: #bd6910;
}

.bar-value {
  color: var(--muted-text);
  padding-right: 0.55rem;
  text-align: right;
}

.comparison-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  margin-bottom: 1rem;
}

.comparison-legend span,
.comparison-label,
.comparison-bar-line span,
.comparison-bar-line strong {
  font-family: var(--font-sans);
  font-size: 0.8rem;
}

.comparison-legend i {
  display: inline-block;
  height: 0.65rem;
  margin-right: 0.35rem;
  width: 1.2rem;
}

.jackson-key,
.comparison-fill {
  background: var(--accent-color);
}

.median-key,
.comparison-fill.median {
  background: var(--secondary-accent);
}

.wifia-key,
.comparison-fill.wifia {
  background: var(--ink);
}

.comparison-row {
  border-top: 1px solid var(--border-color);
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(120px, 0.7fr) minmax(0, 2fr);
  padding: 0.9rem 0;
}

.comparison-row:first-of-type {
  border-top: none;
}

.comparison-label {
  color: var(--text-color);
  font-weight: 750;
  line-height: 1.25;
}

.comparison-bars {
  display: grid;
  gap: 0.35rem;
}

.comparison-bar-line {
  align-items: center;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: 4.5rem minmax(140px, 1fr) 4.8rem;
}

.comparison-bar-line span,
.comparison-bar-line strong {
  color: var(--muted-text);
  font-weight: 650;
}

.comparison-bar-line strong {
  text-align: right;
}

.comparison-track {
  background: #edf0ef;
  height: 0.75rem;
}

.comparison-fill {
  height: 100%;
  min-width: 2px;
}

.comparison-fill.warn {
  background: #bd6910;
}

.callout {
  background: var(--soft-blue);
  border-left: 4px solid var(--accent-color);
  margin: 2rem 0;
  padding: 1.2rem 1.4rem;
}

.callout p {
  font-size: 0.92rem;
  margin: 0;
}

.builder-grid {
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.5fr);
}

.control-panel,
.result-panel {
  padding: 1.25rem;
}

.control-panel {
  gap: 1rem;
}

.result-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 1rem;
}

.result-grid div {
  border: 1px solid var(--border-color);
  padding: 1rem;
}

.result-grid span {
  color: var(--muted-text);
  display: block;
  font-size: 0.76rem;
  text-transform: uppercase;
}

.result-grid strong {
  color: var(--accent-color);
  display: block;
  font-size: 1.45rem;
  margin-top: 0.25rem;
}

.card-comparison {
  grid-template-columns: 1fr 1fr;
  margin: 2rem 0;
}

.card {
  border-top: 3px solid var(--accent-color);
  padding: 1.25rem;
}

.card.warning {
  border-top-color: var(--secondary-accent);
}

.card p {
  font-size: 0.95rem;
  line-height: 1.55;
  margin: 0;
}

.line-chart {
  height: 300px;
  width: 100%;
}

.axis,
.grid-line {
  stroke: #d8d5cf;
  stroke-width: 1;
}

.series-revenue {
  fill: none;
  stroke: var(--accent-color);
  stroke-width: 3;
}

.series-expense {
  fill: none;
  stroke: var(--secondary-accent);
  stroke-width: 3;
}

.dot-revenue {
  fill: var(--accent-color);
}

.dot-expense {
  fill: var(--secondary-accent);
}

.axis-label {
  fill: var(--muted-text);
  font-family: var(--font-sans);
  font-size: 11px;
}

.legend {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.legend span {
  color: var(--muted-text);
  font-family: var(--font-sans);
  font-size: 0.82rem;
}

.legend i {
  display: inline-block;
  height: 0.7rem;
  margin-right: 0.35rem;
  width: 0.7rem;
}

.blue {
  background: var(--accent-color);
}

.red {
  background: var(--secondary-accent);
}

footer {
  border-top: 1px solid var(--border-color);
  color: var(--muted-text);
  font-size: 0.8rem;
  padding: 3rem 2rem;
  text-align: center;
}

@media (max-width: 850px) {
  body {
    font-size: 16px;
  }

  h1 {
    font-size: 2.25rem;
  }

  .hero {
    min-height: auto;
    padding-top: 6.5rem;
  }

  .drip-field {
    top: 0.75rem;
  }

  .hero-metrics,
  .toolbar,
  .builder-grid,
  .card-comparison,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .preset-tabs {
    grid-auto-flow: column;
    grid-auto-columns: minmax(8.5rem, 1fr);
    grid-template-columns: none;
    overflow-x: auto;
  }

  .era {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 4rem;
  }

  .era-marker {
    background: var(--bg-color);
    border-bottom: 2px solid var(--border-color);
    border-right: none;
    padding: 0 0 1rem;
    position: relative;
    text-align: left;
    top: 0;
  }

  .bar-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .bar-value {
    text-align: left;
  }

  .comparison-row,
  .comparison-bar-line {
    grid-template-columns: 1fr;
  }

  .comparison-bar-line strong {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .drip {
    animation: none;
    opacity: 0.35;
  }

  .waterline {
    transition: none;
  }

  .era {
    transition: none;
  }
}