:root {
  --bg: #050705;
  --bg-soft: #0b0f0b;
  --panel: #0d130f;
  --panel-2: #111913;
  --text: #d6e0d5;
  --muted: #8f9f90;
  --accent: #9dd8a6;
  --accent-2: #7fb988;
  --line: rgba(157, 216, 166, 0.25);
  --line-strong: rgba(157, 216, 166, 0.42);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background:
    radial-gradient(70rem 32rem at 88% -8%, rgba(157, 216, 166, 0.13), transparent 60%),
    radial-gradient(42rem 24rem at 0% 100%, rgba(157, 216, 166, 0.06), transparent 70%),
    var(--bg);
  line-height: 1.6;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(157, 216, 166, 0.08) 0, rgba(157, 216, 166, 0.08) 1px, transparent 1px, transparent 36px),
    repeating-linear-gradient(90deg, rgba(157, 216, 166, 0.08) 0, rgba(157, 216, 166, 0.08) 1px, transparent 1px, transparent 36px);
  opacity: 0.12;
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.06) 0.6px, transparent 0.6px);
  background-size: 3px 3px;
  mix-blend-mode: soft-light;
  opacity: 0.17;
  z-index: -1;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: #b8e8be;
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.section {
  padding: 4.5rem 0;
}

h1,
h2,
h3 {
  margin: 0 0 1rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(2rem, 5.2vw, 3.65rem);
  line-height: 1.08;
}

h2 {
  font-size: clamp(1.45rem, 3.1vw, 2rem);
}

h3 {
  font-size: 1.1rem;
}

p {
  margin: 0;
}

.lead {
  color: var(--muted);
  max-width: 62ch;
}

.eyebrow {
  margin-bottom: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.76rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(157, 216, 166, 0.12);
  background: rgba(5, 7, 5, 0.82);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 4.3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: linear-gradient(145deg, #121712, #070b08);
  object-fit: cover;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.05rem;
}

.site-nav a {
  color: var(--text);
  font-size: 0.95rem;
  padding: 0.35rem 0.2rem;
  border-bottom: 1px solid transparent;
}

.site-nav a:hover {
  border-color: var(--line-strong);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 38px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
}

.hero {
  padding-top: 5rem;
  padding-bottom: 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 1.8rem;
  align-items: center;
}

.hero-copy {
  display: grid;
  gap: 1.2rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.55rem 1rem;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid var(--line);
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.btn-primary {
  background: rgba(157, 216, 166, 0.16);
  color: #dbf4dd;
}

.btn-ghost {
  background: rgba(17, 25, 19, 0.75);
  color: var(--text);
}

.btn-secondary {
  background: rgba(17, 25, 19, 0.82);
  color: var(--muted);
}

.btn[disabled] {
  opacity: 0.65;
  cursor: not-allowed;
}

.visual-shell {
  position: relative;
  min-height: 320px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background:
    radial-gradient(24rem 10rem at 70% 0%, rgba(157, 216, 166, 0.16), transparent 66%),
    linear-gradient(170deg, rgba(13, 19, 15, 0.92), rgba(7, 10, 7, 0.98));
  overflow: hidden;
}

.visual-shell canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.visual-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 1rem;
  color: var(--muted);
  font-size: 0.84rem;
  background:
    radial-gradient(16rem 12rem at 80% 15%, rgba(157, 216, 166, 0.17), transparent 70%),
    linear-gradient(180deg, rgba(5, 7, 5, 0.4), rgba(5, 7, 5, 0.94));
}

.visual-fallback::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(157, 216, 166, 0.08) 0, rgba(157, 216, 166, 0.08) 1px, transparent 1px, transparent 30px),
    repeating-linear-gradient(90deg, rgba(157, 216, 166, 0.08) 0, rgba(157, 216, 166, 0.08) 1px, transparent 1px, transparent 30px);
}

.visual-fallback p {
  position: relative;
  z-index: 1;
}

.visual-shell.is-3d canvas {
  opacity: 1;
}

.visual-shell.is-3d .visual-fallback {
  opacity: 0;
}

.card-grid {
  display: grid;
  gap: 0.95rem;
  margin-top: 1.3rem;
}

.card-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(13, 19, 15, 0.98), rgba(8, 11, 9, 0.95));
  padding: 1rem;
}

.card p {
  color: var(--muted);
}

.project-card {
  margin-top: 1rem;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(15, 21, 16, 0.94), rgba(8, 12, 8, 0.92));
  padding: 1.25rem;
  display: grid;
  gap: 0.9rem;
  max-width: 760px;
}

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

.projects-grid .project-card {
  max-width: none;
}

.project-note {
  color: var(--muted);
  font-size: 0.95rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-size: 0.75rem;
  color: var(--accent);
}

.list-plain {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
  display: grid;
  gap: 0.5rem;
  max-width: 74ch;
}

.contact-links {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.contact-links a {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.45rem 0.8rem;
  background: rgba(17, 25, 19, 0.72);
  word-break: break-word;
}

.site-footer {
  border-top: 1px solid rgba(157, 216, 166, 0.16);
  padding: 1.25rem 0 2.2rem;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.hero-inline-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.diagram-panel,
.download-panel {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(160deg, rgba(13, 19, 15, 0.98), rgba(8, 11, 9, 0.95));
  padding: 1.2rem;
}

.p2p-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.55rem;
  max-width: 560px;
}

.p2p-node {
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
  padding: 0.7rem 0.5rem;
  font-family: "Space Grotesk", sans-serif;
}

.p2p-link {
  display: grid;
  place-items: center;
  color: var(--accent);
  min-width: 90px;
  font-size: 1.2rem;
}

.p2p-notes {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
  display: grid;
  gap: 0.32rem;
}

.download-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.download-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(17, 25, 19, 0.72);
  padding: 1rem;
  display: grid;
  gap: 0.65rem;
}

.download-meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.download-note,
.hash-note,
.solo-note {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.solo-note {
  color: var(--accent);
}

@media (max-width: 1024px) {
  .card-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

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

  .hero {
    padding-top: 3.5rem;
  }
}

@media (max-width: 820px) {
  .menu-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 4vw;
    left: 4vw;
    background: rgba(8, 12, 8, 0.98);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.65rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav.is-open {
    display: flex;
  }

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

@media (max-width: 640px) {
  .section {
    padding: 3.25rem 0;
  }

  .card-grid-4 {
    grid-template-columns: 1fr;
  }
}