:root{
  --bg0:#020617;
  --bg1:#0b1120;
  --bg2:#111827;

  --panel: rgba(2,6,23,0.70);
  --panel2: rgba(15,23,42,0.72);

  --text:#e5e7eb;
  --muted:#cbd5f5;
  --muted2:#9ca3af;

  --border: rgba(148,163,184,0.22);
  --border2: rgba(59,130,246,0.35);

  --accent:#38bdf8;
  --accent2:#22c55e;
  --warn:#fbbf24;

  --radius-xl: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;

  --shadow: 0 22px 60px rgba(0,0,0,0.45);
  --shadow2: 0 26px 80px rgba(0,0,0,0.55);

  --max: 1120px;

  --mono: "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --ui: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;

  --tfast: 160ms ease-out;
  --tmed: 240ms ease-out;
}

*{ box-sizing:border-box; margin:0; padding:0; }
html,body{ height:100%; scroll-behavior:smooth; }
body{
  font-family: var(--ui);
  color: var(--text);
  background:
    repeating-linear-gradient(
      135deg,
      rgba(15, 23, 42, 0.22) 0,
      rgba(15, 23, 42, 0.22) 1px,
      transparent 1px,
      transparent 11px
    ),
    linear-gradient(
      to bottom,
      var(--bg0) 0%,
      var(--bg1) 18%,
      #4b5563 55%,
      var(--bg2) 80%,
      var(--bg0) 100%
    );
  -webkit-font-smoothing: antialiased;
}

a{ color: inherit; text-decoration:none; }
img{ max-width:100%; display:block; }

.page{ min-height:100vh; display:flex; flex-direction:column; }

.container{ max-width: var(--max); margin:0 auto; padding:0 1.25rem; width:100%; }

.nav-shell{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(2,6,23,0.92), rgba(2,6,23,0.72));
  border-bottom: 1px solid rgba(148,163,184,0.18);
}

header.nav{
  min-height: 4.4rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 1rem;
  padding: 0.65rem 0;
  flex-wrap: wrap;
}

.brand{
  display:flex;
  align-items:center;
  gap: 0.85rem;
  min-width: 240px;
}

.brand-mark{
  width: 40px;
  height: 40px;
  border-radius: 40%;
  background:
    radial-gradient(circle at 20% 0, #dbeafe 0, #60a5fa 35%, #2563eb 70%, #1d4ed8 100%);
  box-shadow:
    0 0 18px rgba(37, 99, 235, 0.55),
    0 0 40px rgba(37, 99, 235, 0.28);
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
}

.brand-mark::after{
  content:"";
  position:absolute;
  inset: 18%;
  border-radius: 32%;
  border: 1px solid rgba(248,250,252,0.65);
  backdrop-filter: blur(8px);
}

.brand-mark img{ width:100%; height:100%; object-fit: contain; position:relative; z-index:1; }

.brand-text{ display:flex; flex-direction:column; gap:2px; }
.brand-name{
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.9rem;
  color: #e5edff;
}
.brand-tagline{ font-size: 0.78rem; color: #cbd5f5; }

.nav-links{
  display:flex;
  align-items:center;
  flex-wrap: wrap;
  gap: 1.05rem;
  font-size: 0.92rem;
}

.nav-links a{
  color: #e5e7eb;
  padding: 0.25rem 0;
  position:relative;
}

.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-0.08rem;
  width:0;
  height:2px;
  border-radius: var(--radius-pill);
  background: linear-gradient(to right, var(--accent), var(--accent2));
  transition: width var(--tfast);
}
.nav-links a:hover{ color:#f9fafb; }
.nav-links a:hover::after{ width:100%; }

.nav-cta{
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(191,219,254,0.85);
  background: radial-gradient(circle at top left, #1d4ed8, #0f172a);
  font-size: 0.82rem;
  font-weight: 600;
  display:inline-flex;
  align-items:center;
  gap:0.45rem;
  box-shadow: 0 14px 36px rgba(0,0,0,0.55);
  white-space: nowrap;
}
.nav-cta .dot{
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent2);
  box-shadow: 0 0 12px rgba(34,197,94,0.75);
}

main{ flex: 1; padding: 1.3rem 0 3.2rem 0; }

.hero{
  position:relative;
  border-radius: var(--radius-xl);
  overflow:hidden;
  border: 1px solid rgba(148,163,184,0.18);
  background:
    radial-gradient(circle at 10% 0%, rgba(56,189,248,0.14), transparent 55%),
    radial-gradient(circle at 90% 0%, rgba(34,197,94,0.10), transparent 55%),
    linear-gradient(180deg, rgba(2,6,23,0.72), rgba(2,6,23,0.82));
  box-shadow: var(--shadow2);
  margin-top: 1.15rem;
}

.hero.bg{
  background:
    radial-gradient(circle at 10% 0%, rgba(56,189,248,0.14), transparent 55%),
    radial-gradient(circle at 90% 0%, rgba(34,197,94,0.10), transparent 55%),
    linear-gradient(180deg, rgba(2,6,23,0.72), rgba(2,6,23,0.82)),
    var(--hero-img, none);
  background-size: cover;
  background-position: center;
}

.hero-overlay{
  position:absolute;
  inset:0;
  background: linear-gradient(180deg, rgba(2,6,23,0.62), rgba(2,6,23,0.88));
  pointer-events:none;
}

.hero-inner{
  position:relative;
  z-index:1;
  padding: 2.0rem 1.35rem 1.7rem 1.35rem;
  display:grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  gap: 1.1rem;
  align-items: start;
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:0.55rem;
  padding: 0.25rem 0.85rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(191,219,254,0.75);
  background: rgba(2,6,23,0.72);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #cbd5f5;
  margin-bottom: 0.8rem;
}
.kicker .dot{
  width:8px; height:8px; border-radius: 999px;
  background: var(--accent2);
  box-shadow: 0 0 14px rgba(34,197,94,0.75);
}

h1{
  font-size: clamp(2.0rem, 3.2vw, 2.75rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
  margin-bottom: 0.75rem;
}
h1 span{
  background: linear-gradient(120deg, #60a5fa, #22c55e);
  -webkit-background-clip:text;
  background-clip:text;
  color: transparent;
}

.lead{
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.55;
  max-width: 60ch;
}

.hero-side{
  border-radius: 18px;
  border: 1px solid rgba(59,130,246,0.28);
  background: rgba(2,6,23,0.62);
  padding: 1rem 1rem 0.95rem 1rem;
  box-shadow: 0 16px 46px rgba(0,0,0,0.45);
}

.hero-side h3{
  font-size: 0.96rem;
  margin-bottom: 0.5rem;
  color: #f9fafb;
  letter-spacing: -0.02em;
}
.hero-side ul{ list-style:none; display:grid; gap:0.45rem; font-size:0.88rem; color: var(--muted); }
.hero-side li{ display:flex; gap:0.55rem; align-items:flex-start; }
.bullet{
  width: 8px; height: 8px; border-radius:999px;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(56,189,248,0.40);
  margin-top: 0.35rem; flex:0 0 auto;
}

.pills{ display:flex; flex-wrap:wrap; gap:0.45rem; margin-top: 0.95rem; }
.pill{
  font-size: 0.78rem;
  padding: 0.22rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148,163,184,0.24);
  background: rgba(2,6,23,0.62);
  color: var(--muted);
  white-space: nowrap;
}
.pill strong{ color:#f9fafb; font-weight:700; }

.layout{
  margin-top: 1.35rem;
  display:grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.42fr);
  gap: 1.15rem;
  align-items:start;
}

.panel{
  border-radius: var(--radius-xl);
  border: 1px solid rgba(148,163,184,0.18);
  background: rgba(2,6,23,0.62);
  box-shadow: var(--shadow);
  overflow:hidden;
}

.panel-inner{ padding: 1.2rem 1.15rem 1.25rem 1.15rem; }

.toc{
  border-radius: 18px;
  border: 1px solid rgba(56,189,248,0.25);
  background: rgba(2,6,23,0.64);
  padding: 1rem 1rem;
  box-shadow: 0 16px 44px rgba(0,0,0,0.42);
}

.toc h2{
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  color: #f9fafb;
}
.toc a{
  display:block;
  padding: 0.45rem 0.55rem;
  border-radius: 12px;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 0.92rem;
  transition: border-color var(--tfast), background var(--tfast), transform var(--tfast);
}
.toc a:hover{
  border-color: rgba(56,189,248,0.35);
  background: rgba(56,189,248,0.08);
  transform: translateY(-1px);
}

.content h2{
  margin-top: 1.15rem;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: #f9fafb;
}
.content h2:first-child{ margin-top:0; }

.content h3{
  margin-top: 0.9rem;
  font-size: 1.02rem;
  color: rgba(241,245,249,0.92);
}

.content p{
  margin-top: 0.6rem;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.65;
}

.content ul{
  margin-top: 0.65rem;
  padding-left: 1.2rem;
  color: var(--muted);
  line-height: 1.65;
}
.content li{ margin-bottom: 0.35rem; }

.checklist{
  margin-top: 0.75rem;
  border-radius: 18px;
  border: 1px solid rgba(34,197,94,0.22);
  background: rgba(34,197,94,0.06);
  padding: 0.9rem 0.9rem;
}
.checklist h4{
  font-size: 0.92rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: rgba(34,197,94,0.92);
  margin-bottom: 0.55rem;
}
.checklist ul{ list-style:none; padding-left:0; margin-top:0.4rem; }
.checklist li{
  display:flex;
  gap: 0.55rem;
  align-items:flex-start;
  margin-bottom: 0.55rem;
}
.check{
  width: 18px; height: 18px;
  border-radius: 6px;
  border: 1px solid rgba(34,197,94,0.55);
  background: rgba(2,6,23,0.62);
  box-shadow: 0 0 0 3px rgba(34,197,94,0.08);
  flex:0 0 auto;
  margin-top: 0.2rem;
  position:relative;
}
.check::after{
  content:"";
  position:absolute;
  left: 4px; top: 7px;
  width: 8px; height: 4px;
  border-left: 2px solid rgba(34,197,94,0.92);
  border-bottom: 2px solid rgba(34,197,94,0.92);
  transform: rotate(-45deg);
  opacity: 0.75;
}

.callout{
  margin-top: 0.85rem;
  border-radius: 18px;
  border: 1px solid rgba(251,191,36,0.22);
  background: rgba(251,191,36,0.06);
  padding: 0.9rem 0.9rem;
}
.callout h4{
  font-size: 0.92rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: rgba(251,191,36,0.95);
  margin-bottom: 0.45rem;
}
.callout p{ margin-top: 0.4rem; color: rgba(251,191,36,0.92); }

.code{
  margin-top: 0.75rem;
  border-radius: 16px;
  border: 1px solid rgba(59,130,246,0.28);
  background: rgba(2,6,23,0.82);
  overflow:auto;
  box-shadow: inset 0 0 22px rgba(0,0,0,0.55);
}
.code pre{
  padding: 0.9rem 0.95rem;
  font-family: var(--mono);
  font-size: 0.84rem;
  line-height: 1.55;
  color: rgba(229,231,235,0.92);
  white-space: pre;
}

.small{
  font-size: 0.86rem;
  color: rgba(156,163,175,0.92);
  line-height: 1.55;
  margin-top: 0.55rem;
}

.footer{
  border-top: 1px solid rgba(148,163,184,0.16);
  background: rgba(2,6,23,0.78);
  padding: 1.5rem 0 2.1rem 0;
  color: rgba(203,213,225,0.82);
  font-size: 0.84rem;
}
.footer-inner{ display:flex; justify-content:space-between; gap: 1rem; flex-wrap: wrap; }
.footer-links{ display:flex; flex-wrap:wrap; gap: 0.9rem; }
.footer-links a{ color: #cbd5f5; }

@media (max-width: 980px){
  .hero-inner{ grid-template-columns: minmax(0,1fr); }
  .layout{ grid-template-columns: minmax(0,1fr); }
}
@media (max-width: 720px){
  header.nav{ align-items:flex-start; }
}