:root {
  color-scheme: dark;
  --bg: #041326;
  --bg-deep: #020914;
  --surface: rgba(11, 31, 58, 0.74);
  --surface-strong: rgba(17, 44, 77, 0.88);
  --surface-soft: rgba(9, 25, 47, 0.56);
  --line: rgba(139, 177, 222, 0.22);
  --line-strong: rgba(125, 184, 255, 0.38);
  --text: #f6f9ff;
  --muted: #b9c8de;
  --subtle: #7f94af;
  --accent: #2e8cff;
  --accent-strong: #59b5ff;
  --accent-cyan: #6fe7ff;
  --ok: #66df9b;
  --shadow: 0 24px 70px rgba(0, 8, 20, 0.42);
  --radius: 8px;
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg-deep);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(7, 34, 70, 0.72) 0, rgba(4, 19, 38, 0) 620px),
    linear-gradient(135deg, rgba(46, 140, 255, 0.17) 0, transparent 32%),
    radial-gradient(ellipse at top right, rgba(111, 231, 255, 0.16), transparent 36%), var(--bg);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(137, 177, 222, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(137, 177, 222, 0.08) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, black, transparent 72%);
}

img,
svg {
  display: block;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 68px;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid rgba(139, 177, 222, 0.16);
  background: rgba(3, 13, 28, 0.82);
  backdrop-filter: blur(18px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 780;
}

.brand {
  font-size: 23px;
}

.brand img,
.footer-brand img {
  width: 34px;
  height: 34px;
  border-radius: 22%;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 8px 18px rgba(0, 8, 20, 0.2);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 610;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition:
    color 160ms ease,
    transform 160ms ease;
}

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

.site-nav svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.78fr);
  gap: 58px;
  align-items: center;
  max-width: var(--max);
  min-height: 650px;
  margin: 0 auto;
  padding: 48px 24px 42px;
}

.hero-copy {
  min-width: 0;
}

.hero h1 {
  margin: 0;
  color: var(--text);
  font-size: 82px;
  font-weight: 830;
  line-height: 0.95;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 640px;
  margin: 20px 0 0;
  color: #d7e6ff;
  font-size: 26px;
  font-weight: 720;
  line-height: 1.22;
}

.hero-body {
  max-width: 600px;
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.68;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 750;
  line-height: 1.1;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.button svg {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-right: 10px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.2;
}

.button .github-mark {
  width: 21px;
  height: 21px;
  fill: currentColor;
  stroke: none;
}

.button-primary,
.button-platform {
  color: white;
  background: linear-gradient(180deg, #2d91ff, #1267e9);
  border-color: rgba(133, 199, 255, 0.5);
  box-shadow:
    0 16px 34px rgba(20, 103, 233, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.button-secondary {
  color: #e9f3ff;
  background: rgba(8, 23, 43, 0.62);
  border-color: var(--line);
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary:hover,
.button-platform:hover {
  box-shadow:
    0 18px 42px rgba(20, 103, 233, 0.36),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.button-secondary:hover {
  border-color: var(--line-strong);
  background: rgba(18, 45, 78, 0.72);
}

.download-note {
  display: flex;
  align-items: center;
  min-height: 22px;
  margin: 12px 0 0;
  color: var(--subtle);
  font-size: 13px;
}

.download-note::before {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(102, 223, 155, 0.1);
  content: "";
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  max-width: 650px;
  margin: 42px 0 0;
  padding: 0;
  color: var(--muted);
}

.hero-facts div {
  min-width: 0;
  padding-right: 24px;
}

.hero-facts div + div {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.hero-facts dt {
  margin: 0 0 5px;
  color: #eaf4ff;
  font-size: 15px;
  font-weight: 760;
}

.hero-facts dd {
  margin: 0;
  color: var(--subtle);
  font-size: 13px;
  line-height: 1.45;
}

.hero-product {
  position: relative;
  min-width: 0;
}

.product-window {
  overflow: hidden;
  filter: drop-shadow(0 24px 52px rgba(0, 8, 20, 0.36));
}

.window-bar {
  display: none;
}

.product-window img {
  width: 100%;
  height: auto;
}

.feature-band,
.workflow-section,
.detail-section,
.integration-section,
.faq-section,
.download-section {
  max-width: var(--max);
  margin: 0 auto;
  padding-right: 24px;
  padding-left: 24px;
}

.workflow-section,
.integration-section,
.faq-section,
.download-section {
  scroll-margin-top: 84px;
}

.feature-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  padding-top: 18px;
  padding-bottom: 26px;
}

.feature-band article {
  min-width: 0;
  padding: 24px 25px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(7, 24, 47, 0.5);
}

.feature-band article:first-child {
  border-left: 1px solid var(--line);
  border-radius: var(--radius) 0 0 var(--radius);
}

.feature-band article:last-child {
  border-right: 1px solid var(--line);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.feature-band article + article {
  border-left: 1px solid var(--line);
}

.feature-band svg {
  width: 34px;
  height: 34px;
  margin-bottom: 17px;
  color: var(--accent-strong);
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.feature-band h2 {
  margin: 0 0 7px;
  color: var(--text);
  font-size: 18px;
  font-weight: 770;
  line-height: 1.25;
}

.feature-band p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.workflow-section {
  padding-top: 54px;
  padding-bottom: 50px;
}

.section-heading,
.download-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.section-heading h2,
.download-heading h2,
.detail-copy h2 {
  margin: 0;
  color: var(--text);
  font-size: 36px;
  font-weight: 810;
  line-height: 1.1;
  letter-spacing: 0;
}

.section-heading p,
.download-heading p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.workflow-grid article {
  position: relative;
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 19, 38, 0.54);
}

.step-number {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--accent-strong);
  background: rgba(46, 140, 255, 0.1);
  font-size: 26px;
  font-weight: 800;
}

.workflow-grid h3 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 21px;
  font-weight: 770;
}

.workflow-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.detail-section {
  display: grid;
  grid-template-columns: minmax(0, 0.74fr) minmax(360px, 0.68fr);
  gap: 44px;
  align-items: center;
  padding-top: 38px;
  padding-bottom: 62px;
}

.detail-copy {
  min-width: 0;
}

.detail-copy p {
  max-width: 590px;
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.65;
}

.detail-copy ul {
  display: grid;
  gap: 10px;
  margin: 25px 0 0;
  padding: 0;
  list-style: none;
}

.detail-copy li {
  position: relative;
  padding-left: 24px;
  color: #d8e7fa;
  font-size: 15px;
}

.detail-copy li::before {
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent-cyan);
  box-shadow: 0 0 16px rgba(111, 231, 255, 0.42);
  content: "";
}

.detail-image {
  overflow: hidden;
  filter: drop-shadow(0 22px 46px rgba(0, 8, 20, 0.3));
}

.detail-image img {
  width: 100%;
  height: auto;
}

.integration-section {
  padding-top: 46px;
  padding-bottom: 62px;
}

.integration-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.integration-panel {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 19, 38, 0.54);
}

.integration-panel-wide {
  grid-row: span 2;
}

.integration-panel h3 {
  margin: 0 0 7px;
  color: var(--text);
  font-size: 21px;
  font-weight: 790;
}

.integration-panel p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 15px;
}

.integration-panel img {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 18px 34px rgba(0, 8, 20, 0.28));
}

.faq-section {
  padding-top: 34px;
  padding-bottom: 60px;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.faq-grid article {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 19, 38, 0.54);
}

.faq-grid h3 {
  margin: 0 0 9px;
  color: var(--text);
  font-size: 18px;
  font-weight: 790;
  line-height: 1.25;
}

.faq-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.faq-grid code {
  color: #e9f3ff;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.download-section {
  padding-top: 54px;
  padding-bottom: 38px;
  border-top: 1px solid rgba(139, 177, 222, 0.14);
}

.release-state {
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: rgba(8, 23, 43, 0.56);
  font-size: 13px;
  font-weight: 680;
}

.ffmpeg-callout {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 18px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(90deg, rgba(46, 140, 255, 0.15), rgba(7, 24, 47, 0.56));
}

.ffmpeg-callout svg {
  width: 25px;
  height: 25px;
  color: var(--accent-cyan);
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.ffmpeg-callout strong,
.ffmpeg-callout span {
  display: block;
}

.ffmpeg-callout strong {
  color: #f3f8ff;
  font-size: 15px;
  font-weight: 790;
}

.ffmpeg-callout span {
  color: var(--muted);
  font-size: 14px;
}

.ffmpeg-callout code {
  color: #e9f3ff;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.ffmpeg-callout a {
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 740;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.download-card {
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  transition:
    border-color 160ms ease,
    background 160ms ease,
    transform 160ms ease;
}

.download-card.is-active {
  border-color: rgba(111, 231, 255, 0.52);
  background: var(--surface-strong);
}

.platform-icon {
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  color: var(--accent-strong);
  fill: currentColor;
}

.download-card h3 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 21px;
  font-weight: 790;
}

.download-card p {
  min-height: 48px;
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 14px;
}

.button-platform {
  width: 100%;
  min-height: 50px;
  padding: 0 16px;
  font-size: 14px;
}

.manual-links {
  margin: 17px 0 0;
  color: var(--subtle);
  text-align: center;
  font-size: 14px;
}

.manual-links a {
  margin-left: 12px;
  color: var(--accent-strong);
  font-weight: 740;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 30px 24px 42px;
  border-top: 1px solid rgba(139, 177, 222, 0.14);
  color: var(--subtle);
}

.footer-brand {
  font-size: 23px;
}

.site-footer p {
  margin: 7px 0 0;
  font-size: 13px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 680;
}

.site-footer nav a:hover,
.manual-links a:hover,
.ffmpeg-callout a:hover {
  color: var(--text);
}

@media (max-width: 1040px) {
  .site-nav {
    gap: 18px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 36px;
    min-height: 0;
    padding-top: 44px;
  }

  .hero h1 {
    font-size: 64px;
  }

  .hero-product {
    max-width: 560px;
  }

  .feature-band,
  .workflow-grid,
  .faq-grid,
  .download-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-band {
    gap: 14px;
  }

  .feature-band article,
  .feature-band article:first-child,
  .feature-band article:last-child,
  .feature-band article + article {
    border: 1px solid var(--line);
    border-radius: var(--radius);
  }

  .detail-section {
    grid-template-columns: 1fr;
  }

  .detail-image {
    max-width: 560px;
  }

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

  .integration-panel-wide {
    grid-row: auto;
  }
}

@media (max-width: 760px) {
  .site-header {
    height: auto;
    min-height: 64px;
    padding: 12px 18px;
  }

  .site-nav {
    display: none;
  }

  .hero,
  .feature-band,
  .workflow-section,
  .detail-section,
  .integration-section,
  .faq-section,
  .download-section,
  .site-footer {
    padding-right: 18px;
    padding-left: 18px;
  }

  .hero {
    padding-top: 34px;
    padding-bottom: 28px;
  }

  .hero h1 {
    font-size: 50px;
  }

  .hero-lede {
    font-size: 22px;
  }

  .hero-body {
    font-size: 16px;
  }

  .button {
    width: 100%;
  }

  .hero-facts {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 30px;
  }

  .hero-facts div,
  .hero-facts div + div {
    padding: 0;
    border-left: 0;
  }

  .feature-band,
  .workflow-grid,
  .integration-grid,
  .faq-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .feature-band {
    padding-top: 8px;
  }

  .section-heading,
  .download-heading {
    display: block;
  }

  .section-heading h2,
  .download-heading h2,
  .detail-copy h2 {
    font-size: 30px;
  }

  .release-state {
    display: inline-flex;
    margin-top: 14px;
  }

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

  .ffmpeg-callout a {
    grid-column: 1 / -1;
    padding-top: 4px;
  }

  .download-card p {
    min-height: 0;
  }

  .site-footer {
    display: block;
  }

  .site-footer nav {
    margin-top: 20px;
  }
}

@media (max-width: 430px) {
  .hero h1 {
    font-size: 44px;
  }

  .brand {
    font-size: 21px;
  }

  .brand img,
  .footer-brand img {
    width: 31px;
    height: 31px;
  }

  .hero-actions {
    gap: 10px;
  }

  .feature-band article,
  .workflow-grid article,
  .integration-panel,
  .faq-grid article,
  .download-card {
    padding: 22px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }
}