:root {
  color-scheme: dark;
  --ink: #f7f0df;
  --muted: #bcb6a8;
  --faint: #817b70;
  --line: rgba(247, 240, 223, 0.15);
  --panel: rgba(19, 22, 24, 0.72);
  --panel-strong: rgba(25, 29, 31, 0.9);
  --green: #8ce0b9;
  --rose: #e78b8f;
  --gold: #e7c56b;
  --blue: #7eb6e8;
  --bg: #0e1112;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 18%, rgba(140, 224, 185, 0.13), transparent 28rem),
    radial-gradient(circle at 82% 28%, rgba(231, 139, 143, 0.1), transparent 24rem),
    linear-gradient(135deg, #0e1112 0%, #171513 54%, #101719 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: inherit;
}

#signal-canvas {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100vw;
  height: 100vh;
  opacity: 0.78;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.5rem;
  padding: 0 5vw;
  border-bottom: 1px solid rgba(247, 240, 223, 0.08);
  background: rgba(14, 17, 18, 0.72);
  backdrop-filter: blur(18px);
}

.brand,
.nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.7rem;
  min-width: 0;
  text-decoration: none;
  font-weight: 760;
}

.brand-mark {
  width: 0.85rem;
  height: 0.85rem;
  flex: 0 0 auto;
  border: 2px solid var(--green);
  border-radius: 50%;
  box-shadow: 0 0 0 0.35rem rgba(140, 224, 185, 0.08), 0 0 1.5rem rgba(140, 224, 185, 0.42);
}

.nav {
  gap: clamp(0.7rem, 2vw, 1.4rem);
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a {
  text-decoration: none;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--ink);
}

main {
  min-height: calc(100vh - 4.5rem);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 22rem);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
  min-height: calc(100vh - 8rem);
  padding: clamp(2.8rem, 6vw, 5rem) 5vw clamp(2rem, 4vw, 3.4rem);
}

.hero-copy {
  max-width: 58rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 13ch;
  margin: 0;
  font-size: clamp(3.8rem, 10vw, 8rem);
  line-height: 0.86;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 4.8rem);
  line-height: 0.94;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.22;
  letter-spacing: 0;
}

.lede {
  max-width: 44rem;
  margin: 1.8rem 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2.1vw, 1.45rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  text-decoration: none;
  font-weight: 650;
}

.primary-action {
  background: var(--ink);
  color: #121414;
  border-color: transparent;
}

.secondary-action {
  background: rgba(247, 240, 223, 0.05);
  color: var(--ink);
}

.primary-action:hover,
.secondary-action:hover,
.primary-action:focus-visible,
.secondary-action:focus-visible {
  transform: translateY(-1px);
}

.status-panel {
  display: grid;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--panel);
  backdrop-filter: blur(20px);
  overflow: hidden;
}

.status-panel > div {
  display: grid;
  gap: 0.22rem;
  min-height: 5rem;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
}

.status-panel > div:last-child {
  border-bottom: 0;
}

.status-label {
  color: var(--faint);
  font-size: 0.78rem;
  font-weight: 650;
  text-transform: uppercase;
}

.status-panel strong {
  align-self: end;
  font-size: 1.18rem;
}

.band {
  padding: clamp(2.5rem, 7vw, 5rem) 5vw;
  border-block: 1px solid rgba(247, 240, 223, 0.1);
  background: rgba(247, 240, 223, 0.06);
}

.intro p {
  max-width: 66rem;
  margin: 0;
  font-size: clamp(1.35rem, 3.2vw, 3rem);
  line-height: 1.08;
  font-weight: 650;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(13rem, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(2rem, 7vw, 6rem);
  padding: clamp(4rem, 9vw, 7rem) 5vw;
}

.section-heading {
  align-self: start;
}

.note,
.shelf,
.principles {
  border-top: 1px solid var(--line);
}

.note {
  max-width: 46rem;
  padding-top: 1.25rem;
}

.note time,
.shelf-index {
  color: var(--gold);
  font-size: 0.86rem;
  font-weight: 760;
}

.note h3 {
  margin-top: 0.75rem;
  font-size: clamp(1.5rem, 3vw, 2.35rem);
}

.note p,
.shelf p,
.principles li {
  color: var(--muted);
}

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

.shelf {
  min-height: 15rem;
  padding: 1rem 0.2rem 0 0;
}

.shelf h3 {
  margin-top: 2.2rem;
}

.shelf a {
  color: var(--ink);
  font-weight: 650;
  text-decoration-color: rgba(140, 224, 185, 0.6);
  text-underline-offset: 0.2em;
}

.tool-section {
  display: grid;
  grid-template-columns: minmax(13rem, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(2rem, 7vw, 6rem);
  padding: clamp(4rem, 9vw, 7rem) 5vw;
  border-top: 1px solid var(--line);
  background: rgba(247, 240, 223, 0.035);
}

.lint-workbench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.82fr);
  gap: 1rem;
  align-items: stretch;
}

.lint-input,
.lint-output {
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--panel);
  backdrop-filter: blur(18px);
}

.lint-input {
  display: grid;
  grid-template-rows: auto minmax(17rem, 1fr) auto;
  gap: 0.85rem;
  min-height: 27rem;
  padding: 1rem;
}

.lint-input label {
  color: var(--gold);
  font-size: 0.86rem;
  font-weight: 760;
}

.lint-input textarea {
  width: 100%;
  min-width: 0;
  min-height: 17rem;
  resize: vertical;
  border: 1px solid rgba(247, 240, 223, 0.14);
  border-radius: 0.35rem;
  outline: 0;
  padding: 0.9rem;
  background: rgba(9, 11, 12, 0.78);
  color: var(--ink);
  font: inherit;
  line-height: 1.45;
}

.lint-input textarea:focus {
  border-color: rgba(140, 224, 185, 0.75);
  box-shadow: 0 0 0 0.2rem rgba(140, 224, 185, 0.1);
}

.lint-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.lint-button {
  min-height: 2.5rem;
  border: 1px solid transparent;
  border-radius: 0.35rem;
  padding: 0.55rem 0.8rem;
  background: var(--ink);
  color: #111414;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

.lint-button.ghost {
  border-color: var(--line);
  background: rgba(247, 240, 223, 0.05);
  color: var(--ink);
}

.lint-button:hover,
.lint-button:focus-visible {
  transform: translateY(-1px);
}

.lint-output {
  display: grid;
  grid-template-rows: auto auto minmax(9rem, 1fr);
  gap: 1rem;
  min-height: 27rem;
  padding: 1rem;
}

.verdict {
  display: grid;
  gap: 0.4rem;
  min-height: 6rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.verdict-kicker {
  color: var(--faint);
  font-size: 0.78rem;
  font-weight: 760;
  text-transform: uppercase;
}

.verdict strong {
  align-self: end;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1;
}

.verdict.good strong {
  color: var(--green);
}

.verdict.warn strong {
  color: var(--gold);
}

.verdict.bad strong {
  color: var(--rose);
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 0;
}

.score-grid div {
  min-height: 5rem;
  padding: 0.75rem;
  border: 1px solid rgba(247, 240, 223, 0.1);
  border-radius: 0.35rem;
  background: rgba(247, 240, 223, 0.045);
}

.score-grid dt {
  min-height: 1rem;
  color: var(--faint);
  font-size: 0.76rem;
  font-weight: 650;
  line-height: 1.15;
  overflow-wrap: normal;
}

.score-grid dd {
  margin: 0.35rem 0 0;
  color: var(--ink);
  font-size: 1.5rem;
  font-weight: 760;
}

.lint-findings {
  display: grid;
  gap: 0.65rem;
  align-content: start;
  margin: 0;
  padding: 0;
  list-style: none;
}

.lint-findings li {
  position: relative;
  padding-left: 1rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.lint-findings li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.36rem;
  height: 0.36rem;
  border-radius: 50%;
  background: var(--blue);
}

.principles {
  display: grid;
  grid-template-columns: minmax(13rem, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(2rem, 7vw, 6rem);
  padding: clamp(4rem, 9vw, 7rem) 5vw;
  background: rgba(8, 10, 11, 0.34);
}

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

.principles li {
  position: relative;
  padding-left: 1.4rem;
  font-size: clamp(1.08rem, 2vw, 1.45rem);
}

.principles li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--rose);
  border-radius: 50%;
}

footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  padding: 2rem 5vw;
  color: var(--faint);
  font-size: 0.9rem;
  text-align: center;
}

.footer-dot {
  width: 0.28rem;
  height: 0.28rem;
  border-radius: 50%;
  background: var(--blue);
}

.nowrap {
  white-space: nowrap;
}

@media (max-width: 820px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    min-height: 5.8rem;
    padding-block: 0.85rem;
  }

  .hero,
  .section-grid,
  .tool-section,
  .principles {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: calc(100vh - 8rem);
    align-items: start;
    gap: 1.4rem;
    padding-top: 2.3rem;
    padding-bottom: 2rem;
  }

  .status-panel {
    max-width: 30rem;
  }

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

  .shelf {
    min-height: 10rem;
  }

  .lint-workbench {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .brand {
    width: 100%;
  }

  .brand span:last-child {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  h1 {
    font-size: clamp(2.9rem, 14vw, 3.55rem);
    line-height: 0.92;
  }

  .lede {
    margin-top: 1.2rem;
    font-size: 1rem;
  }

  .hero-actions {
    margin-top: 1.25rem;
  }

  .hero-actions a {
    width: 100%;
  }

  .lint-button {
    width: 100%;
  }

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

  .status-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
  }

  .status-panel > div {
    min-height: 4.2rem;
    padding: 0.7rem;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .status-panel > div:last-child {
    border-right: 0;
  }

  .status-panel strong {
    font-size: 0.9rem;
    line-height: 1.1;
  }
}

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

  .primary-action:hover,
  .secondary-action:hover,
  .primary-action:focus-visible,
  .secondary-action:focus-visible {
    transform: none;
  }
}