:root {
  color-scheme: dark;
  --bg: #06130f;
  --panel: #0d211b;
  --panel-2: #102b24;
  --text: #eafff7;
  --muted: #a3c5ba;
  --line: rgba(125, 255, 214, 0.22);
  --mint: #75ffd1;
  --cyan: #66d9ff;
  --gold: #f7d774;
  --shadow: rgba(0, 0, 0, 0.35);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 12%, rgba(117, 255, 209, 0.12), transparent 34rem),
    radial-gradient(circle at 88% 18%, rgba(102, 217, 255, 0.1), transparent 32rem), var(--bg);
  color: var(--text);
  line-height: 1.5;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
  background: rgba(6, 19, 15, 0.82);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  font-size: 1.05rem;
}

.brand img,
.download-panel img {
  width: 2.3rem;
  height: 2.3rem;
  filter: drop-shadow(0 0 18px rgba(117, 255, 209, 0.3));
}

nav {
  display: flex;
  gap: clamp(0.7rem, 2vw, 1.5rem);
  color: var(--muted);
  font-size: 0.95rem;
}

nav a:hover {
  color: var(--mint);
}

.hero {
  min-height: 88vh;
  position: relative;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: clamp(5rem, 10vw, 8rem) clamp(1rem, 4vw, 4rem) 3rem;
  border-bottom: 1px solid var(--line);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(117, 255, 209, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(117, 255, 209, 0.05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}

.hero-inner {
  position: relative;
  max-width: 58rem;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--mint);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 1rem;
  font-size: clamp(4rem, 13vw, 10rem);
  line-height: 0.82;
  letter-spacing: 0;
}

h2 {
  max-width: 48rem;
  margin-bottom: 1rem;
  font-size: clamp(2rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.hero-copy {
  max-width: 43rem;
  color: var(--muted);
  font-size: clamp(1.1rem, 2.4vw, 1.45rem);
}

.hero-actions,
.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 1.1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  background: var(--mint);
  color: #04120e;
  border-color: transparent;
  box-shadow: 0 16px 40px rgba(117, 255, 209, 0.16);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.terminal {
  width: min(100%, 43rem);
  margin-top: 2rem;
  padding: 1rem;
  display: grid;
  gap: 0.3rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(4, 14, 11, 0.8);
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  box-shadow: 0 20px 80px var(--shadow);
}

.terminal span:first-child {
  color: var(--mint);
}

.band {
  padding: clamp(4rem, 8vw, 7rem) clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
}

.section-head {
  margin-bottom: 2rem;
}

.section-head p,
.split p,
.download p,
.feature-grid p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 4vw, 4rem);
  max-width: 70rem;
  font-size: 1.12rem;
}

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

.feature-grid article,
.download-panel,
.message-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(16, 43, 36, 0.92), rgba(7, 23, 18, 0.92));
  box-shadow: 0 24px 70px var(--shadow);
}

.feature-grid article {
  min-height: 15rem;
  padding: 1.3rem;
}

.feature-grid span {
  display: inline-block;
  margin-bottom: 2rem;
  color: var(--gold);
  font-family: "SFMono-Regular", Consolas, monospace;
}

.download {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 26rem);
  gap: clamp(1.5rem, 5vw, 5rem);
  align-items: center;
}

.download-panel {
  display: grid;
  gap: 0.8rem;
  padding: 1.4rem;
}

.download-panel small {
  color: var(--muted);
  overflow-wrap: anywhere;
}

.message {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(18rem, 34rem);
  gap: clamp(1.5rem, 5vw, 5rem);
}

.message-form {
  display: grid;
  gap: 1rem;
  padding: 1.3rem;
}

label {
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(1, 8, 6, 0.75);
  color: var(--text);
  font: inherit;
  padding: 0.85rem 0.9rem;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(117, 255, 209, 0.35);
}

.form-status {
  min-height: 1.4rem;
  margin: 0;
  color: var(--mint);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem clamp(1rem, 4vw, 4rem);
  color: var(--muted);
}

@media (max-width: 840px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    width: 100%;
    overflow-x: auto;
  }

  .split,
  .download,
  .message {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 560px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}