:root {
  color-scheme: dark;
  --bg: #0c0f0e;
  --surface: #151a18;
  --ink: #f4f5ef;
  --muted: #aab2ac;
  --line: #333b37;
  --accent: #c9ff43;
  --accent-ink: #10130e;
  --warning: #ffb75f;
  --danger: #ff7762;
  --success: #c9ff43;
  --radius: 3px;
  --shadow: 0 20px 60px rgb(0 0 0 / 0.24);
}

body {
  background:
    linear-gradient(rgb(255 255 255 / 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 0.025) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px;
}

.site-header {
  position: relative;
  z-index: 2;
  background: rgb(12 15 14 / 0.94);
  border-bottom-color: #2e3531;
}

.brand {
  letter-spacing: -0.025em;
}

.brand-mark {
  color: var(--accent);
  border-color: var(--accent);
  transform: rotate(-3deg);
}

.signal-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgb(201 255 67 / 0.12);
}

.page-shell {
  padding-top: clamp(28px, 5vw, 72px);
}

.intro-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 360px);
  gap: clamp(28px, 7vw, 100px);
  align-items: end;
  margin-bottom: 44px;
}

.section-index {
  margin-bottom: 12px;
  color: var(--accent);
  font: 750 0.72rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1 {
  max-width: 890px;
  text-transform: uppercase;
  font-size: clamp(2.55rem, 6.4vw, 6.8rem);
  line-height: 0.88;
  letter-spacing: -0.067em;
}

.lede {
  max-width: 780px;
}

.scope-card {
  position: relative;
  padding: 24px 0 6px 24px;
  border-left: 3px solid var(--danger);
}

.scope-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -3px;
  width: 44px;
  height: 3px;
  background: var(--danger);
}

.scope-card strong {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.scope-card p {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.tool-grid {
  grid-template-columns: minmax(0, 1.17fr) minmax(330px, 0.83fr);
}

.panel {
  border-color: #38413c;
  background: rgb(21 26 24 / 0.96);
}

.input-panel {
  border-top: 4px solid var(--accent);
}

.result-panel {
  position: sticky;
  top: 18px;
  border-top: 4px solid var(--danger);
}

.panel h2 {
  margin-bottom: 0;
  font-size: clamp(1.35rem, 2.2vw, 2rem);
  text-transform: uppercase;
}

.field-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.compact-fields {
  grid-template-columns: 1.25fr 0.7fr 0.8fr;
}

textarea,
input,
select {
  background: #0f1311;
  border-color: #424b46;
}

textarea::placeholder,
input::placeholder {
  color: #6f7973;
}

.input-suffix {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
}

.input-suffix input {
  border-radius: 0;
}

.input-suffix span {
  align-self: stretch;
  display: grid;
  place-items: center;
  min-width: 48px;
  border: 1px solid var(--line);
  border-left: 0;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.form-actions {
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.example-button {
  color: var(--accent);
  border: 1px solid #4b574e;
}

.score-badge {
  display: grid;
  place-items: center;
  min-width: 64px;
  height: 48px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font: 800 1.15rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.empty-state {
  min-height: 280px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 10px;
  background: #101412;
  border-color: #414944;
}

.empty-state p {
  margin-bottom: 0;
}

.empty-frame {
  position: relative;
  width: 94px;
  aspect-ratio: 16 / 9;
  border: 2px solid #69736c;
}

.empty-frame::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 24px;
  inset: 50% auto auto 50%;
  border: 1px solid var(--danger);
  transform: translate(-50%, -50%);
}

.readiness-line {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

.coverage-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px 12px;
}

.coverage-list li {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 34px;
  color: var(--muted);
  font-size: 0.82rem;
}

.coverage-list li::before {
  content: "—";
  display: grid;
  place-items: center;
  flex: 0 0 19px;
  height: 19px;
  border: 1px solid #56605a;
  color: #78827c;
  font: 800 0.7rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.coverage-list li[data-complete="true"] {
  color: var(--ink);
}

.coverage-list li[data-complete="true"]::before {
  content: "✓";
  border-color: var(--accent);
  color: var(--accent);
}

.warning-box {
  margin-top: 18px;
  padding: 15px 16px;
  border: 1px solid color-mix(in srgb, var(--warning) 55%, var(--line));
  border-radius: calc(var(--radius) - 3px);
  background: color-mix(in srgb, var(--warning) 10%, var(--surface));
}

.warning-box h3 {
  margin-bottom: 8px;
  font-size: 0.88rem;
}

.warning-box ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.warning-box li + li {
  margin-top: 5px;
}

.prompt-output {
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.prompt-output h3 {
  margin-bottom: 0;
  text-transform: uppercase;
  font-size: 0.84rem;
  letter-spacing: 0.06em;
}

.compact-button {
  padding: 8px 11px;
  font-size: 0.78rem;
}

pre {
  max-height: 440px;
  overflow: auto;
  margin: 14px 0;
  padding: 18px;
  white-space: pre-wrap;
  word-break: break-word;
  background: #090c0b;
  border-left: 3px solid var(--accent);
  color: #e9eee8;
  font: 0.82rem/1.65 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.error-summary {
  margin: 16px 0;
  padding: 13px 15px;
  border: 1px solid var(--danger);
  background: rgb(255 119 98 / 0.08);
  color: #ffb4a7;
  line-height: 1.5;
}

.editorial-grid {
  margin-top: clamp(72px, 10vw, 140px);
  padding-top: 30px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(30px, 8vw, 120px);
}

.editorial-grid h2,
.faq-section h2 {
  font-size: clamp(2rem, 4.5vw, 4rem);
  line-height: 0.98;
  text-transform: uppercase;
}

.method-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.method-list li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.method-list li > span {
  color: var(--danger);
  font: 800 0.75rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.method-list strong {
  display: block;
  margin-bottom: 5px;
}

.method-list p,
.faq-grid p,
.source-note {
  color: var(--muted);
  line-height: 1.65;
}

.faq-section {
  margin-top: clamp(72px, 9vw, 120px);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.faq-grid details {
  padding: 20px 20px 20px 0;
  border-bottom: 1px solid var(--line);
}

.faq-grid details:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.faq-grid details:nth-child(even) {
  padding-left: 20px;
}

.faq-grid summary {
  font-weight: 800;
}

.faq-grid p {
  margin: 13px 0 0;
}

.source-note {
  max-width: 760px;
  margin-top: 24px;
  font-size: 0.82rem;
}

.source-note a {
  color: var(--accent);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 4vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 940px) {
  .intro-layout,
  .editorial-grid {
    grid-template-columns: 1fr;
  }

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

  .result-panel {
    position: static;
  }

  .scope-card {
    max-width: 620px;
  }
}

@media (max-width: 660px) {
  .site-header {
    padding-block: 13px;
  }

  .header-note {
    display: none;
  }

  h1 {
    font-size: clamp(2.45rem, 15vw, 4.2rem);
  }

  .field-pair,
  .compact-fields,
  .coverage-list,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .faq-grid details:nth-child(odd) {
    border-right: 0;
  }

  .faq-grid details:nth-child(even) {
    padding-left: 0;
  }

  .form-actions,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .form-actions .primary {
    width: 100%;
  }
}

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