:root {
  color-scheme: dark;
  --bg: #050506;
  --bg-elevated: #0d0d0f;
  --surface: #141416;
  --surface-soft: #1b1b1e;
  --surface-glass: rgba(20, 20, 22, 0.72);
  --text: #f5f5f7;
  --muted: #a1a1a6;
  --faint: #6e6e73;
  --border: rgba(255, 255, 255, 0.11);
  --border-strong: rgba(255, 255, 255, 0.18);
  --green: #63dfa6;
  --green-strong: #80edbb;
  --blue: #78a9ff;
  --button-text: #101012;
  --shadow: rgba(0, 0, 0, 0.5);
  --image-bg: #0d1016;
  --max-width: 1220px;
}

:root[data-theme='light'] {
  color-scheme: light;
  --bg: #f5f5f7;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-soft: #e9e9ec;
  --surface-glass: rgba(250, 250, 252, 0.76);
  --text: #1d1d1f;
  --muted: #6e6e73;
  --faint: #86868b;
  --border: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.16);
  --green: #138a57;
  --green-strong: #087747;
  --blue: #1769c2;
  --button-text: #ffffff;
  --shadow: rgba(38, 45, 55, 0.16);
  --image-bg: #11151c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -10%, color-mix(in srgb, var(--blue) 8%, transparent), transparent 28rem),
    var(--bg);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: color 0.35s ease, background-color 0.35s ease;
}

a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { max-width: 100%; }
.section-shell { width: min(var(--max-width), calc(100% - 48px)); margin-inline: auto; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 12px;
  width: min(var(--max-width), calc(100% - 48px));
  height: 58px;
  margin: 12px auto 0;
  padding: 0 12px 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid transparent;
  border-radius: 18px;
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  border-color: var(--border);
  background: var(--surface-glass);
  box-shadow: 0 12px 40px var(--shadow);
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
}

.brand { display: flex; gap: 10px; align-items: center; font-size: 15px; font-weight: 650; letter-spacing: -0.025em; }
.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--green) 38%, transparent);
  border-radius: 9px;
  color: var(--green);
  background: color-mix(in srgb, var(--green) 9%, transparent);
  font: 700 13px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.nav-links { display: flex; gap: 25px; align-items: center; color: var(--muted); font-size: 13px; }
.nav-links a { transition: color 0.2s ease; }
.nav-links a:hover, .site-footer a:hover { color: var(--text); }
.nav-github { color: var(--text); }
.theme-toggle {
  width: 34px;
  height: 34px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}
.theme-toggle:hover { transform: scale(1.06); background: var(--surface-soft); }
.theme-icon { grid-area: 1 / 1; width: 16px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.7; transition: opacity 0.25s ease, transform 0.35s ease; }
.theme-icon-sun { opacity: 1; transform: rotate(0) scale(1); }
.theme-icon-moon { opacity: 0; transform: rotate(-35deg) scale(0.65); }
[data-theme='light'] .theme-icon-sun { opacity: 0; transform: rotate(35deg) scale(0.65); }
[data-theme='light'] .theme-icon-moon { opacity: 1; transform: rotate(0) scale(1); }

.hero {
  min-height: calc(100vh - 82px);
  padding: clamp(90px, 12vw, 150px) 0 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.hero-copy { position: relative; z-index: 2; width: 100%; max-width: 980px; min-width: 0; }
.eyebrow {
  margin: 0;
  color: var(--green);
  font: 700 11px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.status-dot { display: inline-block; border-radius: 50%; background: var(--green); }
.status-dot { width: 6px; height: 6px; margin: 0 7px 1px 0; box-shadow: 0 0 13px var(--green); }
h1 {
  max-width: 960px;
  margin: 24px auto 26px;
  font-size: clamp(58px, 8vw, 104px);
  line-height: 0.95;
  letter-spacing: -0.075em;
  font-weight: 720;
}
h1 span {
  color: transparent;
  background: linear-gradient(100deg, var(--green) 5%, var(--blue) 92%);
  background-clip: text;
  -webkit-background-clip: text;
}
.hero-lede {
  max-width: 720px;
  margin: 0 auto;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.5;
  letter-spacing: -0.018em;
}
.hero-actions, .start-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-actions { justify-content: center; margin: 34px 0 24px; }
.button {
  min-height: 46px;
  padding: 0 21px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 650;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--button-text); background: var(--text); }
.button-primary:hover { background: color-mix(in srgb, var(--text) 84%, var(--green)); }
.button-secondary { border-color: var(--border); background: color-mix(in srgb, var(--surface) 62%, transparent); }
.button-secondary:hover { border-color: var(--border-strong); background: var(--surface); }
.install-command {
  width: fit-content;
  max-width: 100%;
  margin: 0 auto;
  padding: 7px 8px 7px 15px;
  display: flex;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--muted);
  background: color-mix(in srgb, var(--surface) 72%, transparent);
  font: 12px ui-monospace, SFMono-Regular, Menlo, monospace;
}
.prompt { color: var(--green); }
.copy-button { margin-left: 8px; padding: 5px 9px; border: 0; border-radius: 7px; color: var(--text); background: var(--surface-soft); cursor: pointer; font-size: 11px; }
.copy-status { height: 18px; margin: 6px 0 0; color: var(--green); font-size: 11px; }

.hero-art { position: relative; width: min(1120px, 100%); margin-top: clamp(65px, 8vw, 105px); }
.glow {
  position: absolute;
  inset: -18% 5% 0;
  background: radial-gradient(ellipse, color-mix(in srgb, var(--blue) 32%, transparent), transparent 67%);
  filter: blur(45px);
  opacity: 0.72;
}
.screenshot-frame {
  overflow: hidden;
  padding: 9px;
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: 0 40px 110px var(--shadow), inset 0 1px rgba(255, 255, 255, 0.08);
}
.hero-shot { position: relative; margin: 0; transform: perspective(1500px) rotateX(1.5deg); transform-origin: bottom; }
.screenshot-frame img, .hero-demo { display: block; width: 100%; height: auto; border-radius: 11px; }
.hero-demo { aspect-ratio: 16 / 9; background: var(--image-bg); }

.trust-strip {
  padding: 27px 0;
  display: flex;
  gap: 34px;
  align-items: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}
.trust-strip > span:first-child { margin-right: auto; color: var(--text); font-weight: 650; }
.strip-item { white-space: nowrap; }

.content-section, .guide-section { padding: clamp(120px, 14vw, 190px) 0 30px; scroll-margin-top: 70px; }
.guide-intro { padding-bottom: 110px; }
.section-heading { margin-bottom: 54px; }
.section-heading h2, .start-section h2 {
  max-width: 820px;
  margin: 18px 0;
  font-size: clamp(44px, 6vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.06em;
  font-weight: 700;
}
.section-heading > p:last-child, .start-section p { max-width: 620px; color: var(--muted); font-size: 17px; letter-spacing: -0.01em; }
.guide-intro .section-heading { max-width: 880px; margin-inline: auto; text-align: center; }
.guide-intro .section-heading h2, .guide-intro .section-heading > p:last-child { margin-inline: auto; }
.split-heading { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr); gap: clamp(45px, 8vw, 110px); align-items: end; }
.split-heading > p { margin: 0 0 7px; }

.tinted-section {
  width: 100%;
  max-width: none;
  padding-right: max(24px, calc((100% - var(--max-width)) / 2));
  padding-left: max(24px, calc((100% - var(--max-width)) / 2));
  background:
    radial-gradient(circle at 85% 22%, color-mix(in srgb, var(--blue) 10%, transparent), transparent 28rem),
    color-mix(in srgb, var(--surface) 68%, var(--bg));
}

.feature-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.feature-card {
  min-height: 210px;
  padding: 27px;
  grid-column: span 2;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 15px 40px color-mix(in srgb, var(--shadow) 32%, transparent);
  transition: border-color 0.25s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:nth-child(1), .feature-card:nth-child(6) { grid-column: span 3; }
.feature-card:hover { border-color: color-mix(in srgb, var(--green) 42%, var(--border)); transform: translateY(-5px); box-shadow: 0 24px 55px color-mix(in srgb, var(--shadow) 48%, transparent); }
.feature-icon { display: block; color: var(--green); font-size: 25px; }
.feature-card h3 { margin: 36px 0 8px; font-size: 19px; letter-spacing: -0.025em; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }

.gallery { display: grid; gap: 20px; }
.gallery-wide { grid-template-columns: 1.35fr 0.65fr; }
.gallery-three { grid-template-columns: repeat(3, 1fr); }
.gallery-two { grid-template-columns: repeat(2, 1fr); }
.screenshot-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 20px 60px color-mix(in srgb, var(--shadow) 35%, transparent);
  transition: transform 0.35s ease, border-color 0.25s ease, box-shadow 0.35s ease;
}
.screenshot-card:hover { border-color: var(--border-strong); transform: translateY(-4px); box-shadow: 0 28px 75px color-mix(in srgb, var(--shadow) 52%, transparent); }
.image-button { display: block; width: 100%; padding: 0; overflow: hidden; border: 0; background: var(--image-bg); cursor: zoom-in; }
.image-button img { display: block; width: 100%; height: 290px; object-fit: contain; border-bottom: 1px solid var(--border); background: var(--image-bg); transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1); }
.image-button:hover img { transform: scale(1.025); }
.featured-card .image-button img { height: 500px; }
.composer-card { grid-column: span 2; }
.composer-card .image-button img { height: 180px; }
.card-copy { padding: 25px 26px 28px; }
.card-copy h3 { margin: 0 0 8px; font-size: 18px; letter-spacing: -0.025em; }
.card-copy p { margin: 0; color: var(--muted); font-size: 14px; }
.card-copy code { padding: 2px 5px; border-radius: 5px; color: var(--blue); background: color-mix(in srgb, var(--blue) 11%, transparent); font: 0.9em ui-monospace, SFMono-Regular, Menlo, monospace; }

/* Give each chapter a distinct product-story composition without changing its content. */
#tasks .screenshot-card:first-child, #profiles .screenshot-card:first-child { grid-column: span 1; }
#tasks .screenshot-card:nth-child(2), #profiles .screenshot-card:nth-child(2) { grid-column: span 2; }
#tasks .screenshot-card:nth-child(2) .image-button img, #profiles .screenshot-card:nth-child(2) .image-button img { height: 390px; }
#settings .screenshot-card:first-child { grid-column: span 2; }
#settings .screenshot-card:first-child .image-button img { height: 390px; }
#editor .gallery { grid-template-columns: 0.72fr 1.28fr; }
#editor .screenshot-card:last-child .image-button img { height: 390px; }

.start-section {
  position: relative;
  overflow: hidden;
  margin-top: 150px;
  padding: clamp(55px, 8vw, 90px);
  display: flex;
  gap: 60px;
  align-items: center;
  justify-content: space-between;
  border: 1px solid color-mix(in srgb, var(--green) 28%, var(--border));
  border-radius: 30px;
  background:
    radial-gradient(circle at 88% 12%, color-mix(in srgb, var(--green) 22%, transparent), transparent 42%),
    var(--surface);
  box-shadow: 0 30px 90px color-mix(in srgb, var(--shadow) 45%, transparent);
}
.start-section::after { position: absolute; right: -8%; bottom: -70%; width: 350px; height: 350px; border: 1px solid color-mix(in srgb, var(--green) 24%, transparent); border-radius: 50%; content: ''; }
.start-section > * { position: relative; z-index: 1; }
.start-section h2 { margin: 15px 0; font-size: clamp(42px, 5vw, 64px); }
.start-section p { margin-bottom: 0; font-size: 16px; }
.start-actions { max-width: 360px; justify-content: flex-end; }
.site-footer { padding: 60px 0 40px; display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; }
.site-footer a { color: var(--text); }

.lightbox {
  width: min(1260px, calc(100% - 32px));
  max-height: calc(100% - 32px);
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text);
  background: var(--bg-elevated);
  box-shadow: 0 30px 120px rgba(0, 0, 0, 0.7);
}
.lightbox::backdrop { background: rgba(3, 4, 6, 0.84); backdrop-filter: blur(10px); }
.lightbox img { display: block; width: 100%; max-height: calc(100vh - 110px); object-fit: contain; border-radius: 11px; }
.lightbox p { margin: 11px 40px 0 2px; color: var(--muted); font-size: 13px; }
.lightbox-close { position: absolute; top: 9px; right: 10px; width: 32px; height: 32px; border: 1px solid var(--border); border-radius: 50%; color: var(--text); background: var(--surface-glass); cursor: pointer; font-size: 22px; line-height: 1; }
.lightbox-close:hover { background: var(--surface-soft); }

.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1); }
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .hero { min-height: auto; }
  .split-heading { grid-template-columns: 1fr; gap: 12px; }
  .gallery-three { grid-template-columns: repeat(2, 1fr); }
  .gallery-three .screenshot-card, #tasks .screenshot-card:first-child, #tasks .screenshot-card:nth-child(2), #profiles .screenshot-card:first-child, #profiles .screenshot-card:nth-child(2) { grid-column: auto; }
  .composer-card, #settings .screenshot-card:first-child { grid-column: span 2; }
  .gallery-wide { grid-template-columns: 1fr; }
  .featured-card .image-button img { height: 420px; }
  .start-section { align-items: flex-start; flex-direction: column; }
  .start-actions { justify-content: flex-start; }
}

@media (max-width: 720px) {
  .section-shell, .site-header { width: min(var(--max-width), calc(100% - 28px)); }
  .site-header { top: 8px; height: 54px; margin-top: 8px; padding-left: 13px; }
  .nav-links { gap: 10px; }
  .nav-links a:not(.nav-github) { display: none; }
  .nav-github { font-size: 12px; }
  .hero { padding-top: 80px; }
  h1 { font-size: clamp(48px, 13vw, 68px); }
  .hero-lede { font-size: 17px; }
  .hero-art { margin-top: 60px; }
  .trust-strip { flex-wrap: wrap; gap: 12px 20px; }
  .trust-strip > span:first-child { width: 100%; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card, .feature-card:nth-child(1), .feature-card:nth-child(6) { grid-column: auto; }
  .gallery-two, #editor .gallery { grid-template-columns: 1fr; }
  .content-section, .guide-section { padding-top: 110px; }
  .tinted-section { padding-inline: 14px; }
  .section-heading h2, .start-section h2 { font-size: clamp(40px, 12vw, 58px); }
  .start-section { margin-top: 105px; padding: 44px 28px; border-radius: 24px; }
}

@media (max-width: 520px) {
  .hero { padding-bottom: 65px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .install-command { width: 100%; font-size: 10px; }
  .install-command code { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .copy-button { flex-shrink: 0; }
  .screenshot-frame { padding: 5px; border-radius: 12px; }
  .feature-grid, .gallery-three { grid-template-columns: 1fr; }
  .composer-card, #settings .screenshot-card:first-child { grid-column: auto; }
  .feature-card { min-height: 180px; }
  .featured-card .image-button img, .image-button img, #tasks .screenshot-card:nth-child(2) .image-button img, #profiles .screenshot-card:nth-child(2) .image-button img, #settings .screenshot-card:first-child .image-button img, #editor .screenshot-card:last-child .image-button img { height: 245px; }
  .composer-card .image-button img { height: 110px; }
  .screenshot-card, .feature-card { border-radius: 18px; }
  .site-footer { display: block; }
  .site-footer a { display: block; margin-top: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .hero-shot, .js .reveal { opacity: 1; transform: none; }
}