:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --panel: #ffffff;
  --panel-soft: #f0f3f7;
  --text: #172033;
  --muted: #657085;
  --border: #dce2eb;
  --strong-border: #c7d0dd;
  --accent: #087ea4;
  --accent-dark: #075f7c;
  --success: #0f8a55;
  --danger: #b42318;
  --shadow: 0 12px 30px rgba(23, 32, 51, 0.08);
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
}

body {
  margin: 0;
  min-height: 100vh;
  font-size: 16px;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  border-bottom: 1px solid var(--border);
  background: rgba(247, 248, 251, 0.94);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar__inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand__mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--text);
  color: #fff;
  font-size: 0.82rem;
  letter-spacing: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--text);
}

.main {
  flex: 1;
}

.hero {
  padding: 52px 0 34px;
  border-bottom: 1px solid var(--border);
  background: #fff;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.7fr);
  gap: 36px;
  align-items: center;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 14px;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.14;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 6px;
  font-size: 1.02rem;
}

.lead {
  max-width: 660px;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero__search {
  margin-top: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 560px;
  padding: 10px;
  border: 1px solid var(--strong-border);
  border-radius: var(--radius);
  background: var(--panel);
}

.hero__search input {
  width: 100%;
  border: 0;
  outline: 0;
  color: var(--text);
  background: transparent;
}

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

.stat {
  min-height: 94px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.stat strong {
  display: block;
  font-size: 1.8rem;
  line-height: 1;
}

.stat span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

.section {
  padding: 38px 0;
}

.section__head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 18px;
}

.section__head p {
  max-width: 620px;
  color: var(--muted);
  margin-bottom: 0;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
}

.tool-card {
  min-height: 156px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 1px 0 rgba(23, 32, 51, 0.03);
}

.tool-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.tool-card__top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.tool-card p {
  color: var(--muted);
  margin-bottom: 0;
  font-size: 0.94rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: var(--panel-soft);
  font-size: 0.74rem;
  font-weight: 700;
  white-space: nowrap;
}

.tool-card__action {
  color: var(--accent);
  font-weight: 800;
  font-size: 0.92rem;
}

.tool-page {
  padding: 34px 0 46px;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 22px;
  align-items: start;
}

.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}

.tool-panel {
  padding: 20px;
}

.tool-ui {
  display: grid;
  gap: 14px;
}

.input,
.textarea,
.select {
  width: 100%;
  border: 1px solid var(--strong-border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  padding: 11px 12px;
  outline: 0;
}

.textarea {
  min-height: 170px;
  resize: vertical;
}

.input:focus,
.textarea:focus,
.select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(8, 126, 164, 0.13);
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.control-row > * {
  flex: 1 1 150px;
}

.button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  padding: 9px 14px;
  font-weight: 800;
}

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

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

.button--secondary:hover {
  background: var(--panel-soft);
  border-color: var(--strong-border);
}

.result {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--strong-border);
  border-radius: var(--radius);
  background: var(--panel-soft);
  padding: 12px;
  word-break: break-word;
}

.result--stacked {
  align-items: stretch;
}

.result--stacked code {
  white-space: pre-line;
  line-height: 1.6;
}

.result .button {
  flex: 0 0 auto;
  min-width: 76px;
  padding-inline: 14px;
}

.result code,
.code-block {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.result code {
  color: var(--text);
  font-size: 0.95rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
}

.coin-feedback {
  width: 112px;
  height: 112px;
  display: grid;
  place-items: center;
  justify-self: center;
  border: 8px solid #d8b449;
  border-radius: 50%;
  background: #f7d774;
  color: #5b4207;
  font-size: 2.4rem;
  font-weight: 900;
  box-shadow: inset 0 0 0 5px rgba(255, 255, 255, 0.28), 0 10px 24px rgba(23, 32, 51, 0.14);
  transform-origin: center;
}

.coin-feedback--flip {
  animation: coinFlip 0.36s ease-out;
}

@keyframes coinFlip {
  0% {
    transform: rotateY(0) scale(1);
  }

  50% {
    transform: rotateY(90deg) scale(0.88);
  }

  100% {
    transform: rotateY(360deg) scale(1);
  }
}

.metric {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.metric strong {
  display: block;
  font-size: 1.45rem;
  line-height: 1;
}

.metric span {
  color: var(--muted);
  font-size: 0.82rem;
}

.content {
  margin-top: 22px;
  padding: 22px;
}

.content p,
.content li {
  color: var(--muted);
}

.content a {
  color: var(--accent);
  font-weight: 700;
}

.sidebar {
  padding: 16px;
}

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

.sidebar a {
  display: block;
  padding: 10px;
  border-radius: var(--radius);
  color: var(--muted);
}

.sidebar a:hover {
  background: var(--panel-soft);
  color: var(--text);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--muted);
  background: #fff;
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hidden {
  display: none !important;
}

.notice {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--panel-soft);
}

.notice--success {
  border-color: rgba(15, 138, 85, 0.35);
  color: var(--success);
  background: rgba(15, 138, 85, 0.08);
}

.notice--error {
  border-color: rgba(180, 35, 24, 0.35);
  color: var(--danger);
  background: rgba(180, 35, 24, 0.08);
}

.chart-panel {
  display: grid;
  gap: 14px;
  padding-top: 4px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
}

.chart-header h3 {
  margin-bottom: 0;
}

.segmented {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--strong-border);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.segmented__button {
  min-height: 34px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  padding: 6px 12px;
  font-weight: 800;
}

.segmented__button.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(23, 32, 51, 0.12);
}

.bar-chart-wrap {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-soft);
  overflow: hidden;
}

.bar-chart {
  height: 240px;
  display: flex;
  align-items: end;
  gap: 3px;
  padding: 14px;
  padding-top: 56px;
}

.bar-chart__item {
  min-width: 3px;
  flex: 1 1 3px;
  height: 100%;
  display: flex;
  align-items: end;
}

.bar-chart__item span {
  width: 100%;
  min-height: 4px;
  border-radius: 4px 4px 0 0;
  background: var(--accent);
}

.chart-callouts {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  z-index: 1;
}

.chart-callouts span {
  min-height: 34px;
  display: grid;
  gap: 1px;
  padding: 7px 9px;
  border: 1px solid rgba(199, 208, 221, 0.82);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.chart-callouts strong {
  color: var(--text);
  font-size: 0.72rem;
}

.breakdown-chart {
  min-height: 240px;
  display: grid;
  grid-template-columns: minmax(160px, 220px) minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.donut {
  width: min(220px, 100%);
  aspect-ratio: 1;
  border-radius: 50%;
  position: relative;
  background: conic-gradient(var(--accent), var(--accent));
}

.donut::after {
  content: "";
  position: absolute;
  inset: 22%;
  border-radius: 50%;
  background: var(--panel-soft);
}

.chart-legend {
  display: grid;
  gap: 10px;
}

.legend-item {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.legend-item span {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.legend-item strong {
  font-size: 0.92rem;
}

.legend-item em {
  color: var(--muted);
  font-style: normal;
  font-weight: 700;
}

.legend-blue {
  background: #087ea4;
}

.legend-green {
  background: #22a06b;
}

.legend-orange {
  background: #d97706;
}

@media (max-width: 820px) {
  .hero__grid,
  .tool-layout {
    grid-template-columns: 1fr;
  }

  .section__head {
    display: block;
  }

  .nav {
    gap: 12px;
    font-size: 0.88rem;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 24px, 1120px);
  }

  .topbar__inner {
    min-height: 58px;
  }

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

  .hero {
    padding-top: 34px;
  }

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

  .tool-panel,
  .content {
    padding: 16px;
  }

  .chart-header,
  .breakdown-chart {
    grid-template-columns: 1fr;
  }

  .chart-header {
    display: grid;
  }

  .chart-callouts {
    grid-template-columns: 1fr;
    position: static;
    padding: 12px 12px 0;
    background: var(--panel-soft);
  }

  .bar-chart {
    padding-top: 14px;
  }
}