@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #0a0e1a; --bg2: #111827; --surface: #1a2236; --surface2: #243049;
  --border: rgba(255,255,255,0.07); --text: #e2e8f0; --text2: #8896b0;
  --orange: #ff8a2a; --orange2: #f59e0b; --orange-glow: rgba(255,138,42,0.18);
  --green: #22c55e; --green-glow: rgba(34,197,94,0.15);
  --blue: #3b82f6; --purple: #a855f7; --red: #ef4444;
  --radius: 16px; --radius-sm: 10px;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
  font-family:'Inter',system-ui,sans-serif; background:var(--bg);
  color:var(--text); line-height:1.7; overflow-x:hidden;
}

/* ── Hero ── */
.hero {
  min-height:80vh; display:flex; flex-direction:column;
  align-items:center; justify-content:center; text-align:center;
  padding:60px 20px; position:relative; overflow:hidden;
}
.hero::before {
  content:''; position:absolute; inset:0;
  background:radial-gradient(ellipse 60% 50% at 50% 40%, rgba(255,138,42,0.08) 0%, transparent 70%);
}
.hero-badge {
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 16px; border-radius:20px; font-size:12px; font-weight:600;
  background:rgba(255,138,42,0.1); border:1px solid rgba(255,138,42,0.2);
  color:var(--orange); margin-bottom:24px; letter-spacing:0.5px;
  animation: fadeDown .8s ease;
}
.hero h1 {
  font-size:clamp(32px,5vw,56px); font-weight:800; line-height:1.15;
  background:linear-gradient(135deg,#fff 0%,var(--orange) 50%,var(--orange2) 100%);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  margin-bottom:16px; animation: fadeDown .8s ease .1s both;
}
.hero p { color:var(--text2); font-size:18px; max-width:560px; animation: fadeDown .8s ease .2s both; }
.hero-cta {
  margin-top:32px; display:flex; gap:12px; flex-wrap:wrap; justify-content:center;
  animation: fadeDown .8s ease .3s both;
}
.btn {
  padding:12px 28px; border-radius:var(--radius-sm); font-size:14px; font-weight:600;
  font-family:inherit; border:none; cursor:pointer; transition:all .25s;
  display:inline-flex; align-items:center; gap:8px; text-decoration:none;
}
.btn-primary {
  background:linear-gradient(135deg,var(--orange),var(--orange2));
  color:#fff; box-shadow:0 4px 20px var(--orange-glow);
}
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 32px var(--orange-glow); }
.btn-ghost { background:var(--surface); color:var(--text); border:1px solid var(--border); }
.btn-ghost:hover { border-color:var(--orange); color:var(--orange); }

/* ── Container ── */
.container { max-width:800px; margin:0 auto; padding:0 24px; }

/* ── Section ── */
section { padding:80px 0; }
.section-label {
  display:inline-flex; align-items:center; gap:8px;
  font-size:11px; font-weight:700; text-transform:uppercase;
  letter-spacing:1.5px; color:var(--orange); margin-bottom:12px;
}
.section-title { font-size:28px; font-weight:700; margin-bottom:8px; }
.section-sub { color:var(--text2); font-size:15px; margin-bottom:40px; }

/* ── Progress tracker ── */
.progress-bar {
  position:fixed; top:0; left:0; height:3px; z-index:100;
  background:linear-gradient(90deg,var(--orange),var(--orange2));
  transition:width .3s; width:0%;
}

/* ── Nav ── */
.nav {
  position:fixed; top:0; left:0; right:0; z-index:99;
  background:rgba(10,14,26,0.85); backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border); padding:0 24px;
  transform:translateY(-100%); transition:transform .3s;
}
.nav.visible { transform:translateY(0); }
.nav-inner {
  max-width:800px; margin:0 auto; display:flex; align-items:center;
  justify-content:space-between; height:56px;
}
.nav-title { font-size:14px; font-weight:700; color:var(--orange); }
.nav-links { display:flex; gap:4px; }
.nav-links a {
  padding:6px 12px; border-radius:6px; font-size:12px; font-weight:500;
  color:var(--text2); text-decoration:none; transition:all .2s;
}
.nav-links a:hover, .nav-links a.active { color:var(--orange); background:rgba(255,138,42,0.08); }

/* ── Cards ── */
.card {
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); padding:28px; margin-bottom:16px;
  transition:border-color .25s, transform .25s;
}
.card:hover { border-color:rgba(255,138,42,0.2); transform:translateY(-2px); }

/* ── Steps ── */
.step {
  display:flex; gap:20px; margin-bottom:32px;
  opacity:0; transform:translateY(20px);
  transition:all .5s ease;
}
.step.visible { opacity:1; transform:translateY(0); }
.step-num {
  flex-shrink:0; width:44px; height:44px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  font-weight:800; font-size:16px;
  background:linear-gradient(135deg,var(--orange),var(--orange2));
  color:#fff; box-shadow:0 4px 16px var(--orange-glow);
}
.step-content { flex:1; }
.step-content h3 { font-size:17px; font-weight:700; margin-bottom:6px; }
.step-content p { color:var(--text2); font-size:14px; }

/* ── Code blocks ── */
.code-block {
  background:var(--bg2); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:16px 20px; margin:12px 0;
  font-family:'Cascadia Code','Fira Code',monospace; font-size:13px;
  line-height:1.8; overflow-x:auto; position:relative;
}
.code-block .prompt { color:var(--green); }
.code-block .comment { color:var(--text2); font-style:italic; }
.code-block .output { color:var(--orange); }
.copy-btn {
  position:absolute; top:8px; right:8px; padding:4px 10px;
  border-radius:6px; font-size:11px; font-weight:600;
  background:var(--surface2); color:var(--text2); border:1px solid var(--border);
  cursor:pointer; transition:all .2s; font-family:inherit;
}
.copy-btn:hover { color:var(--orange); border-color:var(--orange); }

/* ── Accordion ── */
.accordion { margin-bottom:12px; }
.accordion-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 24px; background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius-sm); cursor:pointer; transition:all .25s;
  font-weight:600; font-size:15px;
}
.accordion-header:hover { border-color:rgba(255,138,42,0.25); }
.accordion-header .icon { transition:transform .3s; color:var(--orange); font-size:18px; }
.accordion.open .accordion-header { border-color:var(--orange); border-radius:var(--radius-sm) var(--radius-sm) 0 0; }
.accordion.open .icon { transform:rotate(45deg); }
.accordion-body {
  max-height:0; overflow:hidden; transition:max-height .4s ease;
  background:var(--bg2); border:1px solid var(--border); border-top:none;
  border-radius:0 0 var(--radius-sm) var(--radius-sm);
}
.accordion.open .accordion-body { max-height:800px; }
.accordion-inner { padding:20px 24px; font-size:14px; color:var(--text2); line-height:1.8; }

/* ── Pipeline visual ── */
.pipeline { display:flex; flex-direction:column; gap:0; margin:24px 0; }
.pipe-step {
  display:flex; align-items:stretch; gap:16px; position:relative;
  padding:12px 0; cursor:pointer;
}
.pipe-line {
  width:3px; background:var(--surface2); position:relative; margin-left:20px;
  transition:background .4s;
}
.pipe-line::before {
  content:''; position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  width:14px; height:14px; border-radius:50%;
  background:var(--surface2); border:3px solid var(--bg);
  transition:all .3s; z-index:1;
}
.pipe-step:hover .pipe-line { background:var(--orange); }
.pipe-step:hover .pipe-line::before { background:var(--orange); box-shadow:0 0 12px var(--orange-glow); }
.pipe-info { flex:1; padding:8px 0; }
.pipe-info h4 { font-size:14px; font-weight:700; margin-bottom:2px; }
.pipe-info p { font-size:12px; color:var(--text2); }
.pipe-tag {
  padding:3px 10px; border-radius:6px; font-size:10px; font-weight:700;
  text-transform:uppercase; letter-spacing:0.5px; align-self:center;
}
.tag-green { background:var(--green-glow); color:var(--green); }
.tag-blue { background:rgba(59,130,246,0.12); color:var(--blue); }
.tag-purple { background:rgba(168,85,247,0.12); color:var(--purple); }

/* ── Tip box ── */
.tip {
  padding:16px 20px; border-radius:var(--radius-sm); margin:16px 0;
  font-size:13px; display:flex; gap:12px; align-items:flex-start;
}
.tip-orange { background:rgba(255,138,42,0.06); border:1px solid rgba(255,138,42,0.15); }
.tip-green { background:rgba(34,197,94,0.06); border:1px solid rgba(34,197,94,0.15); }
.tip-red { background:rgba(239,68,68,0.06); border:1px solid rgba(239,68,68,0.15); }
.tip-icon { font-size:18px; flex-shrink:0; }

/* ── Footer ── */
.footer {
  text-align:center; padding:40px 20px; border-top:1px solid var(--border);
  color:var(--text2); font-size:12px;
}

/* ── Animations ── */
@keyframes fadeDown { from { opacity:0; transform:translateY(-16px); } to { opacity:1; transform:translateY(0); } }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:.6; } }

/* ── Responsive ── */
@media (max-width:600px) {
  .hero { min-height:60vh; padding:40px 16px; }
  .step { flex-direction:column; gap:12px; }
  .nav-links { display:none; }
  section { padding:48px 0; }
}