:root {
  color-scheme: light;
  --ink: #121417;
  --muted: #5d6572;
  --line: #dfe4ea;
  --paper: #f7f5f0;
  --panel: #ffffff;
  --accent: #1388ff;
  --accent-deep: #0d4f96;
  --warm: #f2a63b;
  --green: #3cbf88;
  --shadow: 0 24px 80px rgba(28, 34, 42, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(18, 20, 23, 0.045) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(rgba(18, 20, 23, 0.035) 1px, transparent 1px) 0 0 / 56px 56px,
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 4vw, 56px);
  background: rgba(247, 245, 240, 0.78);
  border-bottom: 1px solid rgba(18, 20, 23, 0.08);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.demo-titlebar,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  width: 18px;
  height: 18px;
  background: conic-gradient(from 180deg, var(--accent), var(--green), var(--warm), var(--accent));
  clip-path: polygon(0 0, 100% 56%, 48% 68%, 28% 100%);
  filter: drop-shadow(0 5px 10px rgba(19, 136, 255, 0.35));
}

.nav-links {
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(420px, 1fr);
  gap: clamp(36px, 6vw, 92px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(52px, 7vw, 88px) clamp(20px, 5vw, 72px) 44px;
}

.hero-copy {
  max-width: 670px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(54px, 7vw, 112px);
  line-height: 0.91;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(34px, 4vw, 64px);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  letter-spacing: 0;
}

.hero-text,
.download-note,
.control-copy p {
  max-width: 560px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.65;
}

.download-note {
  margin-top: 20px;
  font-size: 14px;
  font-weight: 700;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  border-radius: 7px;
  font-weight: 800;
}

.button-primary {
  color: #fff;
  background: var(--ink);
  box-shadow: 8px 8px 0 var(--warm);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.55);
}

.workspace-demo {
  position: relative;
  min-height: 560px;
}

.demo-window {
  position: absolute;
  inset: 8% 0 auto auto;
  width: min(100%, 720px);
  overflow: hidden;
  background: var(--panel);
  border: 1px solid rgba(18, 20, 23, 0.14);
  border-radius: 8px;
  box-shadow: var(--shadow);
  transform: rotate(-1deg);
}

.demo-titlebar {
  gap: 8px;
  height: 44px;
  padding: 0 14px;
  background: #20242a;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
}

.demo-titlebar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ff6b5f;
}

.demo-titlebar span:nth-child(2) {
  background: #ffc247;
}

.demo-titlebar span:nth-child(3) {
  margin-right: 8px;
  background: #43d17f;
}

.demo-body {
  display: grid;
  grid-template-columns: 150px 1fr;
  min-height: 420px;
}

.demo-sidebar {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 26px 20px;
  background: #f0f3f6;
  border-right: 1px solid var(--line);
}

.sidebar-row,
.control-row,
.signal-line {
  display: block;
  height: 12px;
  background: #c8d0d9;
  border-radius: 999px;
}

.sidebar-row.active {
  background: var(--accent);
}

.sidebar-row.short,
.control-row.short,
.signal-line.short {
  width: 58%;
}

.demo-panel {
  display: grid;
  grid-template-columns: 1fr 190px;
  gap: 24px;
  padding: 26px;
}

.mesh-preview {
  position: relative;
  min-height: 340px;
  background:
    linear-gradient(120deg, transparent 49.5%, rgba(19, 136, 255, 0.2) 50%, transparent 50.5%),
    linear-gradient(30deg, transparent 49.5%, rgba(242, 166, 59, 0.22) 50%, transparent 50.5%),
    #f7fafc;
  border: 1px solid var(--line);
  border-radius: 7px;
}

.mesh-node {
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--panel);
  border: 4px solid var(--accent);
  border-radius: 50%;
}

.node-a {
  left: 22%;
  top: 24%;
}

.node-b {
  right: 18%;
  top: 37%;
  border-color: var(--warm);
}

.node-c {
  left: 48%;
  bottom: 20%;
  border-color: var(--green);
}

.control-stack {
  display: grid;
  align-content: start;
  gap: 18px;
}

.control-row {
  width: 100%;
  height: 16px;
}

.demo-control {
  min-height: 46px;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  font: inherit;
  font-weight: 800;
  box-shadow: 0 12px 22px rgba(19, 136, 255, 0.28);
}

.demo-callout {
  position: absolute;
  right: 10%;
  bottom: 8%;
  display: flex;
  gap: 10px;
  align-items: center;
  max-width: 280px;
  padding: 13px 16px;
  background: #20242a;
  color: #fff;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 18px 44px rgba(18, 20, 23, 0.22);
}

.callout-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  background: var(--green);
  border-radius: 50%;
}

.demo-pointer {
  position: absolute;
  right: 26%;
  top: 46%;
  width: 54px;
  height: 54px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 8px rgba(19, 136, 255, 0.13);
}

.demo-pointer::after {
  position: absolute;
  right: -26px;
  bottom: -24px;
  width: 36px;
  height: 36px;
  background: var(--accent);
  clip-path: polygon(0 0, 100% 56%, 48% 68%, 28% 100%);
  content: "";
}

.flow-section,
.setup-section,
.control-section {
  padding: 86px clamp(20px, 5vw, 72px);
}

.flow-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.55fr) 1fr;
  gap: 40px;
  background: #ffffff;
  border-block: 1px solid rgba(18, 20, 23, 0.08);
}

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

.flow-grid article,
.setup-option {
  min-height: 210px;
  padding: 24px;
  background: #f8f9fb;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.flow-grid span,
.option-label {
  display: inline-block;
  margin-bottom: 30px;
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 800;
}

.flow-grid p,
.setup-option p {
  color: var(--muted);
  line-height: 1.55;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

.setup-options {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.setup-option {
  min-height: 260px;
  background: var(--panel);
  box-shadow: 10px 10px 0 rgba(18, 20, 23, 0.08);
}

.control-section {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  gap: 50px;
  align-items: center;
  background: #20242a;
  color: #fff;
}

.control-section .eyebrow,
.control-copy p {
  color: rgba(255, 255, 255, 0.72);
}

.signal-board {
  display: grid;
  gap: 16px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
}

.signal-line {
  width: 72%;
  background: rgba(255, 255, 255, 0.22);
}

.signal-line.wide {
  width: 100%;
}

.signal-pill {
  width: fit-content;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
}

.site-footer {
  justify-content: space-between;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.cursor-buddy {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
  width: 34px;
  height: 34px;
  pointer-events: none;
  transform: translate3d(-100px, -100px, 0);
  transition: opacity 160ms ease;
}

.cursor-buddy__tip {
  position: absolute;
  width: 28px;
  height: 28px;
  background: var(--accent);
  clip-path: polygon(0 0, 100% 56%, 48% 68%, 28% 100%);
  filter: drop-shadow(0 8px 16px rgba(19, 136, 255, 0.38));
}

.cursor-buddy__pulse {
  position: absolute;
  left: 12px;
  top: 8px;
  width: 26px;
  height: 26px;
  border: 2px solid rgba(19, 136, 255, 0.55);
  border-radius: 50%;
  animation: buddy-pulse 1.6s ease-out infinite;
}

@keyframes buddy-pulse {
  from {
    opacity: 0.72;
    transform: scale(0.7);
  }

  to {
    opacity: 0;
    transform: scale(1.8);
  }
}

@media (max-width: 980px) {
  .hero,
  .flow-section,
  .control-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .workspace-demo {
    min-height: 480px;
  }

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

@media (max-width: 720px) {
  .site-header {
    position: static;
  }

  .nav-links {
    display: none;
  }

  h1 {
    font-size: 52px;
  }

  .workspace-demo {
    min-height: 400px;
  }

  .demo-window {
    position: relative;
    inset: auto;
    width: 100%;
    transform: none;
  }

  .demo-body,
  .demo-panel,
  .setup-options {
    grid-template-columns: 1fr;
  }

  .demo-sidebar {
    display: none;
  }

  .demo-callout {
    right: 0;
    bottom: -18px;
  }
}

@media (pointer: coarse), (prefers-reduced-motion: reduce) {
  .cursor-buddy {
    display: none;
  }

  * {
    scroll-behavior: auto;
  }

  .cursor-buddy__pulse {
    animation: none;
  }
}