:root {
  color-scheme: dark;
  --bg: #070b12;
  --surface: #0e1624;
  --surface-2: #121d2d;
  --ink: #f8fafc;
  --muted: #a9b7c8;
  --line: rgba(226, 232, 240, 0.16);
  --blue: #4da3ff;
  --cyan: #2dd4bf;
  --green: #8bd450;
  --orange: #f59e0b;
  --danger: #fb7185;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.36);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 20% 10%, rgba(45, 212, 191, 0.18), transparent 28rem),
    radial-gradient(circle at 80% 0%, rgba(77, 163, 255, 0.2), transparent 26rem),
    linear-gradient(180deg, #08111e 0%, var(--bg) 50%, #05080d 100%);
  color: var(--ink);
}

button {
  font: inherit;
  cursor: pointer;
}

.demo-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto;
  gap: 16px;
  align-items: center;
  min-height: 66px;
  padding: 10px clamp(14px, 2.4vw, 28px);
  background: rgba(7, 11, 18, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand-button,
.demo-nav button,
.back-button,
.primary-action,
.ghost-action,
.tab-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
}

.brand-button {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 12px;
  min-width: 0;
  padding: 6px 12px 6px 6px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #04111d;
  font-weight: 900;
}

.brand-button strong,
.brand-button small {
  display: block;
  text-align: left;
}

.brand-button small {
  color: var(--muted);
  font-size: 0.76rem;
}

.demo-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.demo-nav button,
.back-button,
.primary-action,
.ghost-action,
.tab-button {
  min-height: 38px;
  padding: 0 14px;
  font-weight: 750;
}

.demo-nav button.is-active,
.primary-action {
  background: var(--ink);
  color: #07111d;
}

.back-button {
  color: var(--muted);
}

.demo-main {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: clamp(18px, 3vw, 34px) clamp(14px, 2.6vw, 28px) 38px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(300px, 0.96fr);
  gap: clamp(18px, 3vw, 36px);
  align-items: center;
  min-height: calc(100vh - 150px);
}

.eyebrow {
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 14px;
  font-size: clamp(2.5rem, 4.7vw, 4.85rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(1.85rem, 3.4vw, 3.35rem);
  line-height: 1.03;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.3rem;
  line-height: 1.2;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1rem, 1.15vw, 1.16rem);
  line-height: 1.5;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.choice-card,
.panel,
.metric-card,
.workflow-card,
.demo-card,
.story-card,
.terminal,
.value-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(14, 22, 36, 0.82);
  box-shadow: var(--shadow);
}

.choice-card {
  display: grid;
  gap: 12px;
  min-height: 188px;
  padding: 18px;
  text-align: left;
}

.choice-card:hover,
.choice-card:focus,
.demo-card:hover,
.demo-card:focus {
  border-color: rgba(77, 163, 255, 0.62);
  transform: translateY(-2px);
}

.select-glyph {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 999px;
  background: rgba(77, 163, 255, 0.14);
  color: var(--blue);
  font-size: 1.4rem;
  font-weight: 900;
}

.muted {
  color: var(--muted);
  line-height: 1.55;
}

.hero-visual {
  position: relative;
  min-height: 430px;
}

.architecture-image,
.demo-screen img,
.story-visual img,
.demo-card img {
  display: block;
  width: 100%;
  height: auto;
}

.architecture-image,
.demo-screen,
.story-visual {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(7, 17, 29, 0.92);
  box-shadow: var(--shadow);
}

.architecture-image {
  height: auto;
  max-height: 430px;
  object-fit: contain;
}

.data-stack {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(3, 1fr);
  gap: 12px;
}

.data-tile {
  display: grid;
  align-content: center;
  gap: 8px;
  min-height: 104px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
}

.data-tile strong {
  font-size: 1.32rem;
}

.data-tile span {
  color: var(--muted);
  font-size: 0.88rem;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
}

.stepper {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 16px;
}

.story-card {
  min-height: 420px;
  padding: clamp(20px, 3vw, 32px);
}

.story-visual {
  margin: 16px 0 0;
}

.story-visual img {
  max-height: 170px;
  object-fit: contain;
  object-position: center;
}

.story-card ul {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.story-card li {
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
}

.story-side {
  display: grid;
  gap: 12px;
}

.metric-card,
.panel {
  padding: 16px;
}

.metric-card strong {
  display: block;
  margin-bottom: 4px;
  font-size: 1.42rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

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

.demo-card {
  min-height: 174px;
  padding: 18px;
  text-align: left;
}

.demo-card img {
  aspect-ratio: 16 / 9;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  object-fit: contain;
  background: #07111d;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
}

.demo-card h3 span {
  color: var(--cyan);
}

.demo-shell {
  display: grid;
  gap: 14px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tab-button.is-active {
  background: var(--blue);
  color: #07111d;
  border-color: var(--blue);
}

.demo-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.42fr);
  gap: 14px;
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.workflow-card {
  min-height: 118px;
  padding: 14px;
}

.demo-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 0 16px;
  padding: 8px;
  overflow: visible;
}

.demo-screen img {
  width: auto;
  max-width: 100%;
  max-height: 260px;
  object-fit: contain;
  object-position: center;
}

.architecture-screen img {
  width: min(100%, 900px);
  max-height: min(48vh, 420px);
}

.workflow-card b {
  display: block;
  margin-bottom: 8px;
}

.terminal {
  min-height: 286px;
  padding: 16px;
  background: #05080d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: #b7f7d0;
  overflow: auto;
}

.terminal span {
  display: block;
  margin-bottom: 8px;
}

.bar-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) 68px;
  gap: 10px;
  align-items: center;
  margin: 14px 0;
}

.bar {
  height: 16px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
}

.bar span {
  display: block;
  width: var(--w);
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
}

.try-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.value-card {
  padding: 18px;
}

.value-card strong {
  display: block;
  margin-bottom: 10px;
  color: var(--cyan);
  font-size: 1.12rem;
}

.callout {
  margin-top: 16px;
  padding: 18px;
  border: 1px solid rgba(139, 212, 80, 0.45);
  border-radius: 8px;
  background: rgba(139, 212, 80, 0.1);
}

@media (min-width: 981px) and (max-height: 820px) {
  .demo-header {
    min-height: 60px;
  }

  .brand-button small {
    display: none;
  }

  .demo-main {
    padding-top: 12px;
    padding-bottom: 20px;
  }

  h1 {
    font-size: clamp(2.35rem, 4.2vw, 4rem);
  }

  h2 {
    font-size: clamp(1.75rem, 3vw, 2.85rem);
  }

  h3 {
    font-size: 1.12rem;
  }

  .lead {
    font-size: 0.96rem;
    line-height: 1.36;
  }

  .section-head {
    margin-bottom: 10px;
  }

  .choice-card,
  .demo-card {
    min-height: 132px;
  }

  .choice-card,
  .demo-card,
  .value-card {
    padding: 14px;
  }

  .select-glyph {
    width: 42px;
    height: 42px;
    font-size: 1.1rem;
  }

  .hero-visual {
    min-height: 356px;
  }

  .architecture-image {
    max-height: 356px;
  }

  .data-tile {
    min-height: 86px;
    padding: 13px;
  }

  .story-card {
    min-height: 340px;
  }

  .story-visual img {
    max-height: 102px;
  }

  .demo-card img {
    max-height: 86px;
    margin-bottom: 10px;
  }

  .demo-screen img {
    max-height: 150px;
  }

  .architecture-screen img {
    max-height: min(42vh, 320px);
  }

  .metric-card,
  .panel,
  .workflow-card {
    padding: 12px;
  }

  .workflow-card {
    min-height: 88px;
  }

  .workflow-card b {
    margin-bottom: 5px;
  }

  .tabs {
    gap: 6px;
  }

  .tab-button {
    min-height: 34px;
    padding: 0 12px;
  }

  .story-card li {
    padding: 9px 12px;
  }

  .terminal {
    min-height: 200px;
  }
}

@media (max-width: 980px) {
  .demo-header,
  .hero,
  .stepper,
  .demo-layout {
    grid-template-columns: 1fr;
  }

  .demo-nav {
    order: 3;
    grid-column: 1 / -1;
  }

  .choice-grid,
  .experience-grid,
  .try-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 380px;
  }

  .architecture-image {
    max-height: none;
  }
}

@media (max-width: 680px) {
  h1 {
    font-size: 2.6rem;
  }

  .demo-header {
    align-items: stretch;
  }

  .demo-nav,
  .actions,
  .tabs,
  .workflow-grid {
    display: grid;
    grid-template-columns: 1fr;
  }

  .back-button,
  .demo-nav button,
  .primary-action,
  .ghost-action,
  .tab-button {
    width: 100%;
  }

  .data-stack {
    position: static;
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: auto;
  }

  .story-visual img,
  .demo-screen img,
  .demo-card img {
    max-height: none;
  }
}