/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #121212;
  --bg-card:   #1a1a1a;
  --bg-card2:  #0e0f0f;
  --accent:    #FF5349;
  --accent2:   #FF6E40;
  --text:      #e2e4ea;
  --text-dim:  #8a8fa0;
  --border:    #2a2a2a;
  --green:     #22c55e;
  --blue:      #3b82f6;
  --purple:    #9C63FA;
  --orange:    #BC4D1D;
  --radius:    12px;
  --max-w:     1120px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent2); }

img { max-width: 100%; display: block; }

/* ── Layout helpers ──────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section   { padding: 80px 0; }
.section--alt { background: var(--bg-card); }

/* ── Navigation ──────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(18, 18, 18, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav__logo {
  font-size: 1.25rem; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
.nav__logo span { color: var(--accent); }
.nav__links { display: flex; gap: 28px; list-style: none; }
.nav__links a {
  color: var(--text-dim); font-size: .9rem; font-weight: 500;
  transition: color .2s;
}
.nav__links a:hover,
.nav__links a.active { color: var(--accent); }

.nav__hamburger {
  display: none; background: none; border: none; color: var(--text);
  font-size: 1.5rem; cursor: pointer;
}

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  text-align: center; padding: 100px 0 80px;
  background: radial-gradient(ellipse at 50% 0%, rgba(255,83,73,.08) 0%, transparent 60%);
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800; letter-spacing: -.02em;
  margin-bottom: 20px;
}
.hero h1 span { color: var(--accent); }
.hero p {
  font-size: 1.15rem; color: var(--text-dim);
  max-width: 640px; margin: 0 auto 36px;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 8px;
  font-weight: 600; font-size: .95rem;
  transition: transform .15s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 83, 73, .3);
}
.btn--primary:hover { color: #fff; box-shadow: 0 6px 28px rgba(255, 83, 73, .45); }
.btn--outline {
  border: 1.5px solid var(--border); color: var(--text);
}
.btn--outline:hover { border-color: var(--accent); color: var(--accent); }

.hero__buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ── Feature cards ───────────────────────────────────────── */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color .25s, transform .2s;
}
.card:hover { border-color: var(--accent); transform: translateY(-4px); }
.card__icon {
  font-size: 2rem; margin-bottom: 16px;
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  background: rgba(255,83,73,.1);
}
.card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.card p  { color: var(--text-dim); font-size: .92rem; }

/* ── Section headings ────────────────────────────────────── */
.section__head {
  text-align: center; margin-bottom: 48px;
}
.section__head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700; margin-bottom: 12px;
}
.section__head p {
  color: var(--text-dim); max-width: 560px; margin: 0 auto;
}

/* ── Architecture layers ─────────────────────────────────── */
.arch-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.arch-layer {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .25s;
}
.arch-layer:hover { border-color: rgba(255,255,255,.15); }
.arch-layer__header {
  padding: 16px 24px;
  font-weight: 700;
  font-size: .95rem;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: .02em;
}
.arch-layer__header .tag {
  font-size: .65rem;
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.arch-layer__body {
  padding: 0 24px 20px;
}
.arch-layer__body p {
  color: var(--text-dim);
  font-size: .88rem;
  margin-bottom: 12px;
}

.arch-layer--l1 .arch-layer__header {
  background: linear-gradient(135deg, rgba(255,83,73,.12), rgba(255,110,64,.08));
  color: #fff;
}
.arch-layer--l1 .tag { background: rgba(255,83,73,.2); color: var(--accent); }
.arch-layer--l1 { border-color: rgba(255,83,73,.25); }

.arch-layer--bmm .arch-layer__header {
  background: linear-gradient(135deg, rgba(156,99,250,.12), rgba(156,99,250,.06));
  color: #fff;
}
.arch-layer--bmm .tag { background: rgba(156,99,250,.2); color: var(--purple); }
.arch-layer--bmm { border-color: rgba(156,99,250,.25); }

.arch-layer--l2 .arch-layer__header {
  background: linear-gradient(135deg, rgba(59,130,246,.12), rgba(59,130,246,.06));
  color: #fff;
}
.arch-layer--l2 .tag { background: rgba(59,130,246,.2); color: var(--blue); }
.arch-layer--l2 { border-color: rgba(59,130,246,.25); }

.arch-layer--swap .arch-layer__header {
  background: linear-gradient(135deg, rgba(34,197,94,.12), rgba(34,197,94,.06));
  color: #fff;
}
.arch-layer--swap .tag { background: rgba(34,197,94,.2); color: var(--green); }
.arch-layer--swap { border-color: rgba(34,197,94,.25); }

.arch-layer--chains .arch-layer__header {
  background: linear-gradient(135deg, rgba(255,110,64,.12), rgba(188,77,29,.06));
  color: #fff;
}
.arch-layer--chains .tag { background: rgba(255,110,64,.2); color: var(--accent2); }
.arch-layer--chains { border-color: rgba(255,110,64,.25); }

.arch-connector {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 28px;
  color: var(--text-dim);
  font-size: 1.2rem;
  opacity: .5;
}

.arch-sub {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-top: 4px;
}
.arch-sub__item {
  background: rgba(255,255,255,.04);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: .82rem;
  color: var(--text-dim);
  border: 1px solid rgba(255,255,255,.06);
}
.arch-sub__item strong { color: var(--text); font-weight: 600; }

/* ── Content pages (articles) ────────────────────────────── */
.content { max-width: 780px; margin: 0 auto; }
.content h1 { font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 12px; }
.content .subtitle { color: var(--text-dim); font-size: 1.1rem; margin-bottom: 40px; }
.content h2 {
  font-size: 1.4rem; margin: 48px 0 16px;
  padding-top: 24px; border-top: 1px solid var(--border);
}
.content h3 { font-size: 1.1rem; margin: 28px 0 10px; color: var(--accent); }
.content h4 { font-size: 1rem; margin: 20px 0 8px; }
.content p, .content li { color: var(--text-dim); margin-bottom: 14px; }
.content ul, .content ol { padding-left: 24px; }
.content li { margin-bottom: 8px; }
.content code {
  background: var(--bg-card2); padding: 2px 7px;
  border-radius: 4px; font-size: .88em;
  color: var(--accent);
}
.content pre {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  overflow-x: auto;
  margin: 20px 0;
  font-size: .85rem;
  line-height: 1.7;
}
.content pre code { background: none; padding: 0; color: var(--text-dim); }
.content blockquote {
  border-left: 3px solid var(--accent);
  padding: 16px 20px;
  margin: 24px 0;
  background: var(--bg-card);
  border-radius: 0 8px 8px 0;
}
.content blockquote p { margin-bottom: 0; }

.content-nav {
  display: flex; gap: 14px; margin-top: 48px;
  padding-top: 24px; border-top: 1px solid var(--border);
}

/* ── Blog cards ──────────────────────────────────────────── */
.blog-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color .25s, transform .2s;
  color: var(--text);
}
.blog-card:hover { border-color: var(--accent); transform: translateY(-4px); color: var(--text); }
.blog-card .blog-card__tag {
  font-size: .7rem; padding: 3px 10px;
  border-radius: 20px; font-weight: 600; text-transform: uppercase;
  background: rgba(255,83,73,.15); color: var(--accent);
  display: inline-block; margin-bottom: 12px;
}
.blog-card h3 { font-size: 1.25rem; margin-bottom: 8px; }
.blog-card p { color: var(--text-dim); font-size: .92rem; margin-bottom: 0; }

/* ── Poem ────────────────────────────────────────────────── */
.poem-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 32px 36px;
  margin: 32px 0;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text);
  white-space: pre-wrap;
}

/* ── Steps list ──────────────────────────────────────────── */
.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 48px;
  margin-bottom: 24px;
}
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 32px; height: 32px;
  background: rgba(255,83,73,.12);
  color: var(--accent);
  font-weight: 700; font-size: .9rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: .85rem;
}
.footer a { color: var(--text-dim); }
.footer a:hover { color: var(--accent); }
.footer__links { display: flex; gap: 24px; justify-content: center; margin-bottom: 12px; flex-wrap: wrap; }

/* ── Cookie consent banner ───────────────────────────────── */
.cookie-banner {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 9999;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  display: none;
  animation: cookieSlideUp .3s ease-out;
}
.cookie-banner.show { display: block; }
@keyframes cookieSlideUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}
.cookie-banner__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.cookie-banner__text {
  color: var(--text-dim);
  font-size: .88rem;
  flex: 1;
  min-width: 260px;
}
.cookie-banner__text a { color: var(--accent); }
.cookie-banner__buttons {
  display: flex; gap: 10px; flex-shrink: 0;
}
.cookie-banner__btn {
  padding: 10px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: .85rem;
  cursor: pointer;
  border: none;
  transition: transform .15s, box-shadow .2s;
}
.cookie-banner__btn:hover { transform: translateY(-1px); }
.cookie-banner__btn--accept {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 2px 12px rgba(255, 83, 73, .25);
}
.cookie-banner__btn--decline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text-dim);
}
.cookie-banner__btn--decline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__hamburger { display: block; }
  .nav__links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg); padding: 20px 24px; gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .section { padding: 48px 0; }
  .hero { padding: 60px 0 48px; }
  .arch-sub { grid-template-columns: 1fr; }
}