:root{
  --ink:#111827;--muted:#5b6472;--line:#d8dee8;--bg:#f5f7fb;
  --navy:#07111f;--navy-2:#0e1b2b;--text:#eff6ff;--soft:#aebbc9;
  --blue:#2563eb;--blue-2:#60a5fa;--green:#22c55e;
  --shadow:0 24px 70px rgba(15,23,42,.13);
  --shadow-dark:0 30px 80px rgba(0,0,0,.36);
  --radius:20px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;border-radius:12px}
h1,h2,h3,p{margin-top:0}
.wrap{width:min(960px,calc(100% - 40px));margin-inline:auto}

/* nav */
.topbar{position:sticky;top:0;z-index:30;background:rgba(7,17,31,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav{height:66px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:white}
.brand{display:flex;align-items:center;gap:12px}
.mark{width:40px;height:40px;border-radius:9px;border:1px solid rgba(255,255,255,.16);display:grid;place-items:center;background:linear-gradient(135deg,#1d4ed8,#0f172a);font-weight:900;font-size:.9rem}
.brand strong{font-size:.95rem;color:white}.brand small{font-size:.76rem;color:var(--soft);margin-top:2px;display:block}
.back-link{display:inline-flex;align-items:center;gap:7px;color:#93c5fd;font-weight:700;font-size:.9rem;transition:.15s}.back-link:hover{color:#bfdbfe}

/* hero */
.proj-hero{background:linear-gradient(135deg,var(--navy) 0%,#0b1627 55%,#111827 100%);color:var(--text);padding:70px 0 58px;position:relative;overflow:hidden}
.proj-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 10% 20%,rgba(37,99,235,.22),transparent 35%);pointer-events:none}
.eyebrow{margin:0 0 12px;color:var(--blue-2);font-weight:800;letter-spacing:.09em;text-transform:uppercase;font-size:.75rem}
.proj-hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.05;letter-spacing:-.055em;margin-bottom:16px;color:white}
.proj-hero p{color:#c8d6e8;font-size:1.06rem;max-width:640px;margin-bottom:28px}
.meta-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:0}
.meta-tag{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:8px;padding:6px 12px;font-size:.83rem;color:#c8d6e8;font-weight:600}

/* content sections */
.proj-body{padding:64px 0}
.proj-section{margin-bottom:60px}
.proj-section h2{font-size:1.55rem;letter-spacing:-.04em;margin-bottom:14px;color:var(--ink)}
.proj-section p,.proj-section li{color:var(--muted);font-size:1rem;line-height:1.7}
.proj-section ul,.proj-section ol{padding-left:20px;margin:0 0 16px}
.proj-section li{margin-bottom:8px}

/* cards */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.info-card{background:white;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 12px 32px rgba(15,23,42,.07)}
.info-card h3{font-size:1rem;margin-bottom:10px;color:var(--ink)}
.info-card p,.info-card li{color:var(--muted);font-size:.93rem;margin-bottom:6px}
.info-card ul{padding-left:16px;margin:0}

/* terminal */
.terminal{background:#07111f;color:#dbeafe;border-radius:18px;border:1px solid rgba(255,255,255,.12);box-shadow:var(--shadow);overflow:hidden;margin:20px 0}
.terminal-top{height:43px;background:#0d1b2e;border-bottom:1px solid rgba(255,255,255,.1);display:flex;align-items:center;gap:7px;padding:0 16px}
.dot-r{width:11px;height:11px;border-radius:50%;background:#ef4444}
.dot-y{width:11px;height:11px;border-radius:50%;background:#eab308}
.dot-g{width:11px;height:11px;border-radius:50%;background:#22c55e}
.term-label{color:#5b7a9a;font-size:.8rem;margin-left:8px;font-family:monospace}
pre{margin:0;padding:22px;overflow-x:auto;font-family:"Cascadia Code",Consolas,monospace;font-size:.86rem;line-height:1.75;color:#d7e9ff}
.c{color:#5b7a9a}.g{color:#80f0a7}.cmd{color:#93c5fd}.kw{color:#f9a8d4}

/* image placeholder */
.img-placeholder{background:linear-gradient(135deg,#0f172a,#1e293b);border:2px dashed rgba(255,255,255,.15);border-radius:14px;min-height:260px;display:grid;place-items:center;color:#5b7a9a;font-size:.9rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;margin:20px 0}
.img-placeholder.tall{min-height:380px}

/* callout boxes */
.callout{border-radius:14px;padding:20px 22px;margin:20px 0}
.callout.warn{background:#fff7ed;border:1px solid #fdba74;color:#9a3412}
.callout.success{background:#f0fdf4;border:1px solid #86efac;color:#14532d}
.callout.info{background:#eff6ff;border:1px solid #93c5fd;color:#1e3a8a}
.callout strong{display:block;margin-bottom:4px;font-size:.95rem}
.callout p{margin:0;font-size:.93rem;color:inherit}

/* step list */
.steps{display:grid;gap:16px;margin:16px 0}
.step{display:grid;grid-template-columns:40px 1fr;gap:14px;align-items:start}
.step-num{width:36px;height:36px;border-radius:50%;background:#eff6ff;border:2px solid #dbeafe;color:#1d4ed8;display:grid;place-items:center;font-weight:900;font-size:.88rem;flex-shrink:0}
.step strong{display:block;margin-bottom:4px;color:var(--ink)}
.step p{margin:0;color:var(--muted);font-size:.94rem}

/* lessons */
.lessons{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:16px}
.lesson{background:white;border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:0 10px 28px rgba(15,23,42,.06)}
.lesson strong{display:block;margin-bottom:6px;font-size:.95rem}
.lesson p{margin:0;color:var(--muted);font-size:.91rem}

/* footer */
.proj-footer{background:#07111f;color:#9aa8b8;padding:28px 0}
.proj-footer-grid{display:flex;justify-content:space-between;align-items:center;gap:20px}
.proj-footer p{margin:0}.proj-footer b{color:white}
.proj-nav-btns{display:flex;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 18px;border-radius:10px;font-weight:800;font-size:.9rem;border:1px solid transparent;transition:.18s;cursor:pointer}.btn:hover{transform:translateY(-2px)}
.btn.primary{background:var(--blue);color:white}.btn.secondary{border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:white}
.btn.light{background:white;color:var(--ink);border-color:var(--line)}

@media(max-width:720px){
  .two-col,.lessons{grid-template-columns:1fr}
  .proj-hero{padding:50px 0 40px}
  .proj-body{padding:44px 0}
  .proj-section{margin-bottom:42px}
  .proj-footer-grid{flex-direction:column;align-items:flex-start}
}