:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-soft-2: #f1f5f9;
  --text: #0f172a;
  --text-soft: #475569;
  --muted: #94a3b8;
  --border: #e2e8f0;
  --brand: #2563eb;
  --brand-strong: #1d4ed8;
  --brand-soft: rgba(37, 99, 235, 0.08);
  --code-bg: #f1f5f9;
  --code-text: #be185d;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 4px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 14px rgba(15, 23, 42, 0.06), 0 2px 6px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 14px 40px rgba(15, 23, 42, 0.08), 0 6px 18px rgba(15, 23, 42, 0.06);
  --radius: 12px;
  --radius-sm: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --bg-soft: #0f172a;
    --bg-soft-2: #1e293b;
    --text: #f1f5f9;
    --text-soft: #cbd5e1;
    --muted: #64748b;
    --border: #1e293b;
    --brand: #60a5fa;
    --brand-strong: #93c5fd;
    --brand-soft: rgba(96, 165, 250, 0.12);
    --code-bg: #1e293b;
    --code-text: #f9a8d4;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.5), 0 6px 18px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  line-height: 1.6;
}

a { color: var(--brand); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--brand-strong); }

code {
  font-family: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.92em;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 0.12em 0.45em;
  border-radius: 4px;
}

pre {
  margin: 0;
  background: transparent;
}

pre code {
  background: transparent;
  color: var(--text);
  padding: 0;
  display: block;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre;
  overflow-x: auto;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0;
}

/* === NAV === */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

@media (prefers-color-scheme: dark) {
  .nav { background: rgba(11, 17, 32, 0.85); }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.02em;
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
}

.nav-links a {
  color: var(--text-soft);
  font-weight: 500;
}

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

@media (max-width: 720px) {
  .nav-links { gap: 16px; font-size: 13px; }
  .nav-links a:not(:last-child) { display: none; }
}

/* === HERO === */
main { max-width: 1100px; margin: 0 auto; padding: 0 32px; }

.hero {
  text-align: center;
  padding: 88px 0 72px;
}

.logo-large {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.logo-large svg {
  border-radius: 26px;
  box-shadow: var(--shadow-lg);
}

.hero h1 {
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 auto 24px;
  max-width: 22ch;
}

.hero h1 .grad {
  background: linear-gradient(120deg, #3b82f6 10%, #1d4ed8 50%, #6366f1 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}

.lead {
  font-size: 19px;
  line-height: 1.6;
  color: var(--text-soft);
  max-width: 680px;
  margin: 0 auto;
}

.cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  align-items: stretch;
  margin: 40px 0 16px;
  flex-wrap: wrap;
}

.copy {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 14px 22px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: "JetBrains Mono", monospace;
  font-size: 14px;
  cursor: pointer;
  color: var(--text);
  transition: all 0.15s ease;
  min-width: 340px;
  justify-content: space-between;
  text-align: left;
}

.copy code {
  background: transparent;
  color: var(--text);
  padding: 0;
  font-size: 14px;
}

.copy-cmd {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: "JetBrains Mono", monospace;
  line-height: 1.5;
}

.copy-line {
  display: block;
  white-space: nowrap;
}

.copy-line::before {
  content: "$ ";
  color: var(--muted);
  user-select: none;
}

.copy:hover {
  border-color: var(--brand);
  background: var(--brand-soft);
}

.copy.copied {
  border-color: #16a34a;
  background: rgba(22, 163, 74, 0.08);
}

.copy-hint {
  font-size: 11px;
  color: var(--muted);
  font-family: "Inter", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--text);
  color: var(--bg);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14px;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn-secondary:hover { color: var(--bg); opacity: 0.9; transform: translateY(-1px); }

.install-alt {
  font-size: 13px;
  color: var(--muted);
  margin: 12px 0 0;
}

.channel-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 880px;
  margin: 48px auto 0;
}
@media (max-width: 720px) { .channel-strip { grid-template-columns: 1fr; } }

.channel {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: left;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.channel:hover { border-color: var(--brand); transform: translateY(-2px); }

.channel-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--brand-soft); color: var(--brand);
  border-radius: 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.channel-title {
  font-weight: 700; color: var(--text); font-size: 14px;
  margin-bottom: 2px;
}
.channel-sub { font-size: 12px; color: var(--text-soft); }
.channel-sub code { font-size: 11px; background: var(--bg-soft-2); color: var(--text); }

.install-alt code {
  font-size: 12px;
  background: var(--code-bg);
  color: var(--text);
}

/* === SECTIONS === */
section { padding: 80px 0; border-top: 1px solid var(--border); }
section:first-of-type { border-top: 0; }
section > h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 16px;
  text-align: center;
  letter-spacing: -0.02em;
}
.section-lead {
  text-align: center;
  color: var(--text-soft);
  font-size: 17px;
  max-width: 600px;
  margin: 0 auto 48px;
}

/* === WHY GRID === */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.why-card {
  padding: 28px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.why-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--brand);
}

.why-icon {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  display: inline-flex;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
  align-items: center;
  justify-content: center;
  letter-spacing: -0.02em;
}

.why-card-highlight {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(99, 102, 241, 0.04));
  border-color: rgba(59, 130, 246, 0.3);
}
.why-card-highlight .why-icon {
  background: var(--brand);
  color: #ffffff;
}

.why-card h3 {
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--text);
}

.why-card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-soft);
  line-height: 1.6;
}

/* === EXAMPLE === */
.example-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
  align-items: stretch;
  margin-top: 16px;
}

@media (max-width: 880px) {
  .example-grid { grid-template-columns: 1fr; }
}

.code {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  overflow-x: auto;
  font-size: 13px;
  box-shadow: var(--shadow-sm);
}

.code .key { color: #2563eb; }
.code .str { color: #16a34a; }
.code .num { color: #c026d3; }
.code .punc { color: var(--text-soft); }

@media (prefers-color-scheme: dark) {
  .code .key { color: #60a5fa; }
  .code .str { color: #4ade80; }
  .code .num { color: #f0abfc; }
}

.render-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.render-page {
  width: 100%;
  max-width: 320px;
  background: #ffffff;
  color: #0f172a;
  border-radius: 8px;
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  font-family: "Inter", sans-serif;
}

.render-h1 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 18px;
  color: #0f172a;
}

.render-list {
  list-style: disc;
  margin: 0;
  padding-left: 22px;
  font-size: 14px;
  color: #334155;
  line-height: 1.7;
}

.render-arrow {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

/* === FEATURES === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 16px;
}

.feature {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
  transition: border-color 0.15s ease;
}

.feature:hover { border-color: var(--brand); }

.feature h3 {
  font-size: 15px;
  margin: 0 0 10px;
  color: var(--text);
}

.feature p {
  margin: 0;
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.65;
}

/* === COMPARISON === */
.cmp-table {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
}

.cmp-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1.2fr;
  border-top: 1px solid var(--border);
  font-size: 14px;
}

.cmp-row:first-child { border-top: 0; }

.cmp-row > div {
  padding: 14px 18px;
}

.cmp-row > div:first-child {
  font-weight: 600;
  color: var(--text);
}

.cmp-row > div:nth-child(2) { color: var(--muted); }
.cmp-row > div:nth-child(3) { color: var(--text); }

.cmp-row.cmp-head > div {
  background: var(--bg-soft-2);
  font-weight: 700;
  color: var(--text-soft);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cmp-row .good { color: var(--text); font-weight: 500; }
.cmp-row .good code { font-size: 0.88em; }

@media (max-width: 720px) {
  .cmp-row { grid-template-columns: 1fr; gap: 0; padding: 0; }
  .cmp-row > div { padding: 10px 14px; }
  .cmp-row > div:first-child { background: var(--bg-soft-2); padding-top: 14px; padding-bottom: 4px; }
  .cmp-row.cmp-head { display: none; }
}

/* === FORMAT === */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.spec-table th, .spec-table td {
  padding: 12px 18px;
  text-align: left;
  font-size: 14px;
  border-top: 1px solid var(--border);
}

.spec-table th {
  background: var(--bg-soft-2);
  font-weight: 600;
  color: var(--text-soft);
  text-transform: uppercase;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  border-top: 0;
}

.spec-table tr:first-child td { border-top: 0; }

.spec-link {
  color: var(--text-soft);
  font-size: 14.5px;
  text-align: center;
  margin-top: 16px;
}

/* === INSTALL === */
.install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.install-card {
  padding: 24px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.install-card h3 {
  font-size: 14px;
  margin: 0 0 14px;
  color: var(--brand);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}

.install-card pre {
  background: var(--bg-soft-2);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin: 0 0 12px;
  overflow-x: auto;
}

.install-card pre code {
  font-size: 12.5px;
  color: var(--text);
}

.install-card p {
  margin: 0;
  font-size: 13.5px;
  color: var(--text-soft);
  line-height: 1.6;
}

.install-note {
  font-size: 12px !important;
  color: var(--muted) !important;
  margin-top: 12px !important;
}

/* === FOOTER === */
footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 56px 32px 32px;
  margin-top: 40px;
}

.footer-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border);
}

@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

footer h4 {
  font-size: 11px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
}

footer ul { list-style: none; padding: 0; margin: 0; }

footer ul li {
  margin: 6px 0;
  font-size: 14px;
}

footer ul li a { color: var(--text-soft); }
footer ul li a:hover { color: var(--brand); }

.footer-tag {
  margin: 12px 0 0;
  font-size: 13.5px;
  color: var(--text-soft);
}

.footer-copy {
  max-width: 1100px;
  margin: 24px auto 0;
  font-size: 12.5px;
  color: var(--muted);
  text-align: center;
}

::selection { background: rgba(37, 99, 235, 0.25); }
@media (prefers-color-scheme: dark) {
  ::selection { background: rgba(96, 165, 250, 0.4); }
}

/* Hero screenshots — stacked vertically, plenty of breathing room */
.screenshots {
  max-width: 1100px;
  margin: 4rem auto 0;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}
.shot {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.shot img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  box-shadow: 0 12px 30px -12px rgba(15, 23, 42, 0.25), 0 2px 6px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(15, 23, 42, 0.08);
}
.shot figcaption {
  font-size: 0.875rem;
  color: #64748b;
  text-align: center;
}
@media (prefers-color-scheme: dark) {
  .shot img {
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.6), 0 2px 6px rgba(0, 0, 0, 0.3);
  }
  .shot figcaption { color: #94a3b8; }
}

/* Embed teaser — live <jdf> demo on the landing page */
.embed-teaser {
  max-width: 1100px;
  margin: 5rem auto 0;
  padding: 0 1.5rem;
}
.embed-demo {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 2rem 0 1.5rem;
}
.embed-demo-code pre {
  margin: 0;
  padding: 1.25rem 1.5rem;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 12px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.8125rem;
  line-height: 1.6;
  overflow-x: auto;
  border: 1px solid rgba(15, 23, 42, 0.08);
}
.embed-demo-code pre code .key  { color: #60a5fa; }
.embed-demo-code pre code .str  { color: #fde68a; }
.embed-demo-code pre code .punc { color: #94a3b8; }
.embed-demo-render {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.embed-demo-label {
  font-size: 0.8125rem;
  color: #64748b;
  text-align: center;
  font-weight: 500;
}
.embed-demo-render jdf {
  display: block;
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 12px 30px -12px rgba(15, 23, 42, 0.25), 0 2px 6px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(15, 23, 42, 0.08);
  background: #fff;
}
.embed-foot {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
@media (prefers-color-scheme: dark) {
  .embed-demo-render jdf {
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.6), 0 2px 6px rgba(0, 0, 0, 0.3);
    background: #0f172a;
  }
  .embed-demo-label { color: #94a3b8; }
}