:root {
  color-scheme: light;
  --ink: #17201c;
  --muted: #64716c;
  --faint: #8a9791;
  --line: #dce5df;
  --paper: #ffffff;
  --soft: #f4f7f1;
  --soft-blue: #eef5f7;
  --green: #1e7458;
  --green-dark: #115541;
  --green-soft: #ddf0e7;
  --blue: #315f9d;
  --blue-soft: #e8eff9;
  --amber: #9a6415;
  --amber-soft: #fff2d9;
  --red: #9e423c;
  --red-soft: #ffe8e4;
  --shadow: 0 22px 55px rgba(23, 32, 28, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(31, 116, 88, 0.13), transparent 34rem),
    linear-gradient(180deg, #f8faf5 0%, #edf4f1 52%, #f8faf5 100%);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.55;
  letter-spacing: 0;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

code {
  padding: 0.15rem 0.35rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--green-dark);
  font-size: 0.92em;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 16px 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 0.7rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--green), #0d6d74);
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1rem;
  line-height: 1.1;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.top-nav a {
  padding: 0.55rem 0.72rem;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.top-nav a:hover {
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(290px, 0.72fr) minmax(0, 1.28fr);
  gap: 1.35rem;
  align-items: stretch;
  padding: 22px 0 30px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 610px;
  padding: clamp(1.2rem, 3vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 5.1rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3.2vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: 0;
}

.lead,
.section-copy p {
  color: var(--muted);
  font-size: 1.02rem;
}

.lead {
  max-width: 40rem;
  margin: 1.25rem 0 0;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

.primary-action {
  color: #fff;
  background: var(--green-dark);
}

.secondary-action {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
}

.calculator-shell {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 1rem;
  min-height: 610px;
}

.controls-panel,
.output-panel,
.section,
.site-footer {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
}

.controls-panel {
  padding: 1rem;
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.4rem;
}

.panel-heading h2,
.risk-board h2 {
  font-size: 1.05rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  color: var(--green);
  background: var(--green-soft);
  font-size: 0.78rem;
  font-weight: 800;
}

.control,
.toggle-row {
  display: grid;
  gap: 0.55rem;
  padding: 0.88rem 0;
  border-top: 1px solid var(--line);
}

.control:first-of-type {
  border-top: 0;
}

.control span,
.toggle-row {
  color: var(--muted);
}

.control span,
.toggle-row {
  align-items: center;
}

.control span,
.toggle-row > span {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
}

.control b,
.toggle-row b {
  color: var(--ink);
  font-size: 0.9rem;
}

.control em,
.toggle-row em {
  color: var(--muted);
  font-size: 0.82rem;
  font-style: normal;
  text-align: right;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--green);
}

input[type="number"] {
  width: 100%;
  min-height: 42px;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.toggle-row {
  grid-template-columns: minmax(0, 1fr) auto;
}

.switch {
  position: relative;
  display: inline-flex;
  width: 48px;
  height: 28px;
}

.switch input {
  position: absolute;
  opacity: 0;
}

.switch span {
  width: 100%;
  border-radius: 999px;
  background: #d9e2dc;
  cursor: pointer;
  transition: background 0.2s ease;
}

.switch span::after {
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(23, 32, 28, 0.22);
  transition: transform 0.2s ease;
}

.switch input:checked + span {
  background: var(--green);
}

.switch input:checked + span::after {
  transform: translateX(20px);
}

.output-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.metric-card {
  min-height: 138px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.metric-card span,
.metric-card small {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.metric-card strong {
  display: block;
  margin: 0.7rem 0 0.45rem;
  font-size: clamp(2.1rem, 5vw, 4.6rem);
  line-height: 0.9;
}

.risk-board {
  min-height: 0;
  padding: 1rem;
  border-radius: 8px;
  color: #f7fbf8;
  background:
    linear-gradient(135deg, rgba(17, 85, 65, 0.98), rgba(20, 46, 41, 0.98)),
    #142e29;
}

.risk-board ul {
  display: grid;
  gap: 0.7rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.risk-board li {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  color: #d9e9e3;
  font-size: 0.92rem;
}

.risk-board li::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 0.48rem;
  border-radius: 50%;
  background: #91ddb9;
}

.risk-board li.warn::before {
  background: #f0b35b;
}

.section {
  margin-top: 1.1rem;
  padding: clamp(1rem, 3vw, 1.55rem);
}

.section-copy {
  max-width: 740px;
  margin-bottom: 1.1rem;
}

.section-copy p {
  margin-bottom: 0;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}

.tool-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 176px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.tool-card header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.6rem;
}

.tool-card b {
  display: block;
  font-size: 1.02rem;
}

.tool-card p,
.tool-card small {
  color: var(--muted);
}

.tool-card p {
  margin: 0.7rem 0 1rem;
  font-size: 0.9rem;
}

.tag {
  flex: 0 0 auto;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  color: var(--green);
  background: var(--green-soft);
  font-size: 0.72rem;
  font-weight: 800;
}

.tag.warn {
  color: var(--amber);
  background: var(--amber-soft);
}

.tag.stop {
  color: var(--red);
  background: var(--red-soft);
}

.split {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  gap: 1.2rem;
}

.sticky-copy {
  position: sticky;
  top: 88px;
  align-self: start;
}

.timeline {
  display: grid;
  gap: 0.72rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 0.8rem;
  align-items: center;
  min-height: 76px;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.timeline b {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  color: #fff;
  background: var(--blue);
}

.timeline span {
  color: var(--muted);
}

.deploy-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.deploy-grid article {
  display: grid;
  gap: 0.7rem;
  min-height: 150px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.deploy-grid span {
  color: var(--muted);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, calc(100% - 32px));
  margin: 1.1rem auto 2rem;
  padding: 1rem;
  color: var(--muted);
  box-shadow: none;
}

.site-footer p {
  margin: 0;
}

.site-footer div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: flex-end;
}

.site-footer a {
  color: var(--blue);
  text-underline-offset: 3px;
}

@media (max-width: 1080px) {
  .hero,
  .calculator-shell,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    min-height: auto;
  }

  h1 {
    max-width: 13ch;
  }

  .sticky-copy {
    position: static;
  }
}

@media (max-width: 820px) {
  .app-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

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

  .metrics,
  .stack-grid,
  .deploy-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer div {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  main,
  .app-header,
  .site-footer {
    width: min(100% - 20px, 1180px);
  }

  .hero {
    padding-top: 6px;
  }

  .hero-copy,
  .controls-panel,
  .output-panel,
  .section {
    padding: 0.85rem;
  }

  .control span,
  .toggle-row > span {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.25rem;
  }

  .control em,
  .toggle-row em {
    text-align: left;
  }

  .timeline li {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .timeline b {
    width: 40px;
    height: 40px;
  }
}