*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
:root {
  --ink: #08090c;
  --ink2: #0f1117;
  --ink3: #161b26;
  --lime: #d4ff00;
  --lime2: #aacc00;
  --lime-d: #2a3300;
  --slate: #8896a8;
  --fog: #c8d4e0;
  --white: #f4f8ff;
  --border: #1e2535;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--ink);
  color: var(--white);
  font-family: "DM Sans", sans-serif;
  font-weight: 300;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.1) 2px,
    rgba(0, 0, 0, 0.1) 3px
  );
  opacity: 0.3;
}
.z {
  position: relative;
  z-index: 1;
}

nav {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 300;
  height: 58px;
  display: flex;
  align-items: center;
  padding: 0 48px;
  border-bottom: 1px solid transparent;
  transition:
    background 0.3s,
    border-color 0.3s;
}
nav.stuck {
  background: rgba(8, 9, 12, 0.93);
  backdrop-filter: blur(16px);
  border-color: var(--border);
}
.nav-logo {
  font-family: "Bebas Neue", sans-serif;
  font-size: 1.6rem;
  letter-spacing: 0.06em;
  color: var(--lime);
  text-decoration: none;
}
.nav-logo b {
  color: var(--white);
  font-weight: 400;
}
.nav-c {
  display: flex;
  gap: 32px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.nav-c a {
  font-family: "DM Mono", monospace;
  font-size: 0.72rem;
  color: var(--slate);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-c a:hover,
.nav-c a.on {
  color: var(--lime);
}
.nav-r {
  margin-left: auto;
  display: flex;
  gap: 12px;
  align-items: center;
}
.btn-o {
  font-family: "DM Mono", monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 8px 20px;
  border-radius: 2px;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--slate);
  transition: all 0.2s;
}
.btn-o:hover {
  border-color: var(--lime);
  color: var(--lime);
}
.btn-s {
  background: var(--lime);
  color: var(--ink);
  font-weight: 600;
}
.btn-s:hover {
  background: var(--white);
}

.about-hero {
  padding: 140px 48px 100px;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.ah-eyebrow {
  font-family: "DM Mono", monospace;
  font-size: 0.65rem;
  color: var(--lime);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--lime-d);
  padding: 4px 14px;
  border-radius: 2px;
  display: inline-block;
  margin-bottom: 24px;
}
.ah-title {
  font-family: "Bebas Neue", sans-serif;
  font-size: clamp(3.5rem, 7vw, 6.5rem);
  line-height: 0.92;
  letter-spacing: 0.02em;
}
.ah-title span {
  color: var(--lime);
  display: block;
}
.ah-sub {
  color: var(--slate);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-top: 24px;
  max-width: 480px;
}
.ah-meta {
  display: flex;
  gap: 32px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.meta-item {
}
.meta-label {
  font-family: "DM Mono", monospace;
  font-size: 0.62rem;
  color: var(--slate);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.meta-val {
  font-family: "Bebas Neue", sans-serif;
  font-size: 1.6rem;
  color: var(--lime);
  letter-spacing: 0.04em;
}

.stack-visual {
  position: relative;
}
.stack-box {
  background: var(--ink2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}
.stack-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.stack-row:last-child {
  border-bottom: none;
}
.stack-row:hover {
  background: var(--ink3);
}
.stack-idx {
  font-family: "Bebas Neue", sans-serif;
  font-size: 1.2rem;
  color: var(--lime-d);
  width: 24px;
  flex-shrink: 0;
}
.stack-name {
  font-family: "DM Mono", monospace;
  font-size: 0.82rem;
  color: var(--white);
  flex: 1;
}
.stack-file {
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  color: var(--slate);
}
.stack-status {
  font-family: "DM Mono", monospace;
  font-size: 0.62rem;
  background: rgba(212, 255, 0, 0.1);
  color: var(--lime);
  padding: 3px 10px;
  border-radius: 2px;
  border: 1px solid var(--lime-d);
}

.section {
  padding: 80px 48px;
  max-width: 1200px;
  margin: 0 auto;
}
.section-full {
  padding: 80px 48px;
  border-top: 1px solid var(--border);
}
.section-full-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.eyebrow {
  font-family: "DM Mono", monospace;
  font-size: 0.65rem;
  color: var(--lime);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.big-title {
  font-family: "Bebas Neue", sans-serif;
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  letter-spacing: 0.02em;
  line-height: 0.95;
  margin-bottom: 20px;
}
.body-text {
  color: var(--slate);
  font-size: 0.95rem;
  line-height: 1.85;
  max-width: 680px;
  margin-bottom: 16px;
}

.chapter {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.chapter:last-child {
  border-bottom: none;
}
.ch-num {
  font-family: "Bebas Neue", sans-serif;
  font-size: 5rem;
  color: var(--lime-d);
  line-height: 1;
  letter-spacing: 0.02em;
  position: sticky;
  top: 80px;
}
.ch-content h3 {
  font-family: "Bebas Neue", sans-serif;
  font-size: 2rem;
  letter-spacing: 0.03em;
  margin-bottom: 16px;
  color: var(--lime);
}
.ch-content p {
  color: var(--slate);
  font-size: 0.93rem;
  line-height: 1.85;
  margin-bottom: 14px;
}
.ch-content p strong {
  color: var(--white);
  font-weight: 600;
}
.ch-content pre {
  background: var(--ink2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  font-family: "DM Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.8;
  overflow-x: auto;
  margin: 16px 0;
}
.ch-content pre .cm {
  color: #3a4a5a;
  font-style: italic;
}
.ch-content pre .kw {
  color: #c792ea;
}
.ch-content pre .fn {
  color: #82aaff;
}
.ch-content pre .str {
  color: #c3e88d;
}
.ch-content pre .num {
  color: #f78c6c;
}
.ch-content pre .lime {
  color: var(--lime);
}

.decision-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  margin: 20px 0;
}
.d-card {
  background: var(--ink2);
  border: 1px solid var(--border);
  padding: 20px 18px;
}
.d-q {
  font-family: "DM Mono", monospace;
  font-size: 0.7rem;
  color: var(--slate);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}
.d-a {
  font-family: "DM Sans", sans-serif;
  font-size: 0.88rem;
  color: var(--white);
  line-height: 1.6;
}
.d-a b {
  color: var(--lime);
  font-weight: 600;
}

.timeline {
  position: relative;
  padding-left: 32px;
  margin: 24px 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}
.tl-item {
  position: relative;
  margin-bottom: 28px;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lime);
  border: 2px solid var(--ink);
}
.tl-label {
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  color: var(--lime);
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}
.tl-text {
  color: var(--slate);
  font-size: 0.88rem;
  line-height: 1.7;
}

.file-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 20px 0;
}
.file-row {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--ink2);
  border: 1px solid var(--border);
  padding: 14px 18px;
}
.file-name {
  font-family: "DM Mono", monospace;
  font-size: 0.82rem;
  color: var(--lime);
  flex: 0 0 180px;
}
.file-size {
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  color: var(--slate);
  flex: 0 0 60px;
}
.file-desc {
  font-size: 0.83rem;
  color: var(--slate);
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin: 24px 0;
}
.p-card {
  background: var(--ink2);
  border: 1px solid var(--border);
  padding: 28px 22px;
}
.p-n {
  font-family: "Bebas Neue", sans-serif;
  font-size: 2.5rem;
  color: var(--lime-d);
  margin-bottom: 10px;
}
.p-title {
  font-family: "Bebas Neue", sans-serif;
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
  color: var(--lime);
}
.p-text {
  color: var(--slate);
  font-size: 0.83rem;
  line-height: 1.7;
}

.cta {
  text-align: center;
  padding: 100px 48px;
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "BUILD";
  position: absolute;
  font-family: "Bebas Neue", sans-serif;
  font-size: 28vw;
  color: transparent;
  -webkit-text-stroke: 1px var(--border);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.cta h2 {
  font-family: "Bebas Neue", sans-serif;
  font-size: clamp(3rem, 6vw, 5rem);
  letter-spacing: 0.02em;
  line-height: 0.95;
  position: relative;
}
.cta h2 span {
  color: var(--lime);
  display: block;
}
.cta p {
  color: var(--slate);
  font-size: 1rem;
  margin: 18px 0 36px;
  position: relative;
}
.btn-p {
  font-family: "DM Mono", monospace;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--lime);
  color: var(--ink);
  padding: 14px 36px;
  border-radius: 2px;
  text-decoration: none;
  display: inline-flex;
  transition: all 0.2s;
}
.btn-p:hover {
  background: var(--white);
  transform: translateY(-2px);
}

footer {
  border-top: 1px solid var(--border);
  padding: 36px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
footer p {
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  color: var(--slate);
}
.fl {
  display: flex;
  gap: 28px;
}
.fl a {
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  color: var(--slate);
  text-decoration: none;
  transition: color 0.2s;
}
.fl a:hover {
  color: var(--lime);
}

@media (max-width: 900px) {
  nav {
    padding: 0 24px;
  }
  .nav-c {
    position: static;
    display: flex;
    gap: 16px;
    transform: none;
    margin-left: auto;
  }
  .nav-c a {
    font-size: 0.65rem;
  }
  .nav-r {
    display: none;
  }
  .about-hero {
    grid-template-columns: 1fr;
    padding: 110px 24px 60px;
    gap: 40px;
  }
  .section,
  .section-full {
    padding: 60px 24px;
  }
  .chapter {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .ch-num {
    font-size: 3rem;
    position: static;
  }
  .decision-grid {
    grid-template-columns: 1fr;
  }
  .principles {
    grid-template-columns: 1fr;
  }
  footer {
    flex-direction: column;
    gap: 16px;
    padding: 28px 24px;
    text-align: center;
  }
}