:root{
  --ubam-blue:#0092D6;
  --ubam-blue-deep:#04293A;
  --ubam-navy:#081722;
  --ubam-green:#7BC142;
  --paper:#F3F6F9;
  --panel:#FFFFFF;
  --ink:#0E1720;
  --slate:#54697B;
  --line:#DCE4EA;
  --term-bg:#03070A;
  --term-green:#39FF7A;
  --term-dim:#1E8A44;
  --term-amber:#FFB020;
  --radius:10px;
  --disp:'Space Grotesk',sans-serif;
  --body:'Inter',sans-serif;
  --mono:'JetBrains Mono',monospace;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--body);line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.disp{font-family:var(--disp);}
a{color:inherit;}
.mono{font-family:var(--mono);}

/* ===== Scrollbar / focus ===== */
:focus-visible{outline:2px solid var(--ubam-blue);outline-offset:2px;}
@media (prefers-reduced-motion: reduce){*{animation-duration:0.01ms !important;transition-duration:0.01ms !important;}}

/* ===== Header ===== */
header.site{
  position:fixed;top:0;left:0;right:0;z-index:40;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 28px;background:rgba(8,23,34,0.92);backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.brand{display:flex;align-items:center;gap:12px;}
.brand img{height:34px;display:block;}
.brand .divider{width:1px;height:26px;background:rgba(255,255,255,0.2);}
.brand .tag{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--term-green);text-transform:uppercase;}
nav.site{display:flex;gap:26px;}
nav.site a{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:#C8D6E0;
  text-decoration:none;text-transform:uppercase;position:relative;padding:4px 0;
}
nav.site a::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--ubam-green);transition:width .25s;}
nav.site a:hover::after{width:100%;}
nav.site a:hover{color:#fff;}
@media(max-width:760px){nav.site{display:none;}}

/* ===== Welcome Modal ===== */
.modal-overlay{
  position:fixed;inset:0;z-index:100;background:rgba(3,7,10,0.88);
  display:flex;align-items:center;justify-content:center;padding:20px;
  animation:fadeIn .4s ease;
}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}
.modal-box{
  width:100%;max-width:520px;background:var(--term-bg);
  border:1px solid rgba(57,255,122,0.35);border-radius:var(--radius);
  box-shadow:0 0 0 1px rgba(57,255,122,0.05),0 30px 80px rgba(0,0,0,0.6);
  overflow:hidden;animation:riseIn .5s cubic-bezier(.2,.8,.2,1);
}
@keyframes riseIn{from{opacity:0;transform:translateY(16px) scale(.98);}to{opacity:1;transform:translateY(0) scale(1);}}
.modal-top{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 18px;background:#060B0E;border-bottom:1px solid rgba(255,255,255,0.08);
}
.modal-top .dots{display:flex;gap:6px;}
.modal-top .dots span{width:9px;height:9px;border-radius:50%;background:#2b3339;}
.modal-top .title{font-family:var(--mono);font-size:11px;color:#7C8A93;letter-spacing:.08em;}
.modal-body{padding:26px 26px 22px;}
.modal-logo-row{display:flex;align-items:center;gap:16px;margin-bottom:18px;}
.modal-logo-row img{height:40px;}
.modal-body h2{
  color:#fff;font-size:22px;margin:0 0 6px;letter-spacing:.01em;
}
.modal-body h2 .accent{color:var(--term-green);}
.boot-line{font-family:var(--mono);font-size:12.5px;color:var(--term-dim);margin:2px 0;}
.boot-line .ok{color:var(--term-green);}
.modal-desc{color:#B7C4CC;font-size:14px;margin:16px 0 20px;}
.modal-actions{display:flex;justify-content:flex-end;}
.btn-access{
  font-family:var(--mono);font-size:13px;letter-spacing:.05em;text-transform:uppercase;
  background:var(--term-green);color:#03130A;border:none;padding:11px 20px;border-radius:6px;
  cursor:pointer;font-weight:700;transition:transform .15s, box-shadow .15s;
}
.btn-access:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(57,255,122,0.25);}
.modal-cred{
  margin-top:16px;padding-top:14px;border-top:1px dashed rgba(255,255,255,0.1);
  display:flex;align-items:center;gap:8px;
}
.modal-cred img{height:16px;opacity:.75;filter:grayscale(1) brightness(1.6);}
.modal-cred span{font-family:var(--mono);font-size:10.5px;color:#5C6B73;}
.hidden{display:none !important;}

/* ===== Hero ===== */
.hero{
  position:relative;padding:150px 28px 90px;background:
    radial-gradient(1100px 480px at 15% -10%, rgba(0,146,214,0.35), transparent 60%),
    linear-gradient(180deg, var(--ubam-navy) 0%, var(--ubam-blue-deep) 55%, #062133 100%);
  color:#fff;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;opacity:.09;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.6) 1px, transparent 1px);
  background-size:42px 42px;pointer-events:none;
}
.hero-inner{max-width:1080px;margin:0 auto;position:relative;}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--term-green);
  text-transform:uppercase;display:flex;align-items:center;gap:10px;margin-bottom:18px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--term-green);box-shadow:0 0 8px var(--term-green);animation:pulse 1.6s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
.hero h1{font-size:clamp(34px,5.4vw,58px);line-height:1.06;margin:0 0 20px;font-weight:700;}
.hero h1 span{color:var(--ubam-green);}
.hero p.lead{max-width:600px;color:#C4D3DC;font-size:16.5px;margin:0 0 34px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:56px;}
.btn{
  font-family:var(--mono);font-size:13px;text-transform:uppercase;letter-spacing:.04em;
  padding:12px 20px;border-radius:6px;text-decoration:none;font-weight:700;cursor:pointer;border:1px solid transparent;
}
.btn-primary{background:var(--ubam-green);color:#0A1A0A;}
.btn-primary:hover{filter:brightness(1.08);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,0.25);color:#fff;}
.btn-ghost:hover{border-color:var(--term-green);color:var(--term-green);}

/* boot terminal preview in hero */
.boot-term{
  background:var(--term-bg);border:1px solid rgba(57,255,122,0.25);border-radius:var(--radius);
  max-width:620px;overflow:hidden;box-shadow:0 30px 60px rgba(0,0,0,0.45);
}
.boot-term .bar{display:flex;gap:6px;padding:10px 14px;background:#060B0E;border-bottom:1px solid rgba(255,255,255,0.06);}
.boot-term .bar span{width:9px;height:9px;border-radius:50%;background:#2b3339;}
.boot-term pre{
  margin:0;padding:16px 18px 20px;font-family:var(--mono);font-size:12.5px;color:var(--term-green);
  white-space:pre-wrap;min-height:120px;
}
.boot-term pre .cmt{color:#5C6B73;}
.cursor-blink{display:inline-block;width:7px;height:14px;background:var(--term-green);vertical-align:middle;animation:blink 1s steps(1) infinite;}
@keyframes blink{50%{opacity:0;}}

/* ===== Progress rail ===== */
.rail{
  position:sticky;top:64px;z-index:20;background:var(--paper);
  border-bottom:1px solid var(--line);padding:12px 28px;
}
.rail-inner{max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:0;overflow-x:auto;}
.rail-step{
  display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11.5px;color:var(--slate);
  text-decoration:none;padding:6px 14px 6px 0;white-space:nowrap;
}
.rail-step .num{
  width:22px;height:22px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  font-size:10.5px;color:var(--slate);flex:none;
}
.rail-step.active .num{background:var(--ubam-blue);border-color:var(--ubam-blue);color:#fff;}
.rail-step.active{color:var(--ink);font-weight:600;}
.rail-sep{width:26px;height:1px;background:var(--line);flex:none;}

/* ===== Sections ===== */
.module{padding:88px 28px;border-bottom:1px solid var(--line);}
.module.alt{background:var(--panel);}
.module-inner{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:1fr;gap:40px;}
@media(min-width:920px){.module-inner{grid-template-columns:1fr 1fr;align-items:start;gap:56px;}}
.module-head{font-family:var(--mono);font-size:12px;color:var(--ubam-blue);letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px;display:flex;align-items:center;gap:10px;}
.module-head .badge{width:30px;height:30px;border-radius:7px;background:var(--ubam-blue-deep);color:var(--term-green);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;}
.module h2{font-size:30px;margin:0 0 14px;color:var(--ink);}
.module p.desc{color:var(--slate);font-size:15.5px;margin:0 0 22px;max-width:520px;}
.topic-list{list-style:none;margin:0 0 26px;padding:0;display:grid;gap:10px;}
.topic-list li{
  display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink);
  background:var(--paper);border:1px solid var(--line);padding:11px 13px;border-radius:8px;
}
.topic-list li::before{content:'▸';color:var(--ubam-green);font-weight:700;}
.env-note{
  font-family:var(--mono);font-size:12px;color:var(--slate);display:flex;gap:8px;align-items:center;
  background:#EDF2F6;border:1px dashed var(--line);padding:9px 12px;border-radius:8px;
}

/* ===== Terminal widget ===== */
.terminal{
  background:var(--term-bg);border-radius:var(--radius);overflow:hidden;
  border:1px solid rgba(57,255,122,0.18);box-shadow:0 20px 50px rgba(4,10,14,0.35);
}
.terminal .tbar{
  display:flex;align-items:center;justify-content:space-between;padding:10px 14px;
  background:#060B0E;border-bottom:1px solid rgba(255,255,255,0.06);
}
.terminal .tbar .dots{display:flex;gap:6px;}
.terminal .tbar .dots span{width:9px;height:9px;border-radius:50%;background:#2b3339;}
.terminal .tbar .path{font-family:var(--mono);font-size:11px;color:#7C8A93;}
.terminal .tscreen{
  padding:16px 16px 8px;font-family:var(--mono);font-size:13px;color:var(--term-green);
  height:280px;overflow-y:auto;
}
.terminal .tscreen .line{margin-bottom:6px;white-space:pre-wrap;word-break:break-word;}
.terminal .tscreen .line.user{color:#fff;}
.terminal .tscreen .line.user::before{content:'root@ubam:~# ';color:var(--term-green);}
.terminal .tscreen .line.sys{color:#8FEFA9;}
.terminal .tscreen .line.err{color:#FF6B6B;}
.terminal .tscreen .line.info{color:var(--term-amber);}
.terminal .tform{display:flex;align-items:center;gap:8px;padding:10px 14px 14px;border-top:1px solid rgba(255,255,255,0.06);}
.terminal .tform .prompt{font-family:var(--mono);color:var(--term-green);font-size:13px;}
.terminal .tform input{
  flex:1;background:transparent;border:none;outline:none;color:#fff;font-family:var(--mono);font-size:13px;
}
.terminal .tform button{
  font-family:var(--mono);font-size:11px;background:rgba(57,255,122,0.12);color:var(--term-green);
  border:1px solid rgba(57,255,122,0.3);padding:7px 12px;border-radius:5px;cursor:pointer;text-transform:uppercase;
}
.terminal .tform button:hover{background:rgba(57,255,122,0.2);}
.hint-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.hint-chip{
  font-family:var(--mono);font-size:10.5px;color:var(--ubam-blue);background:#E7F3FA;border:1px solid #CDE6F5;
  padding:5px 9px;border-radius:20px;cursor:pointer;
}
.hint-chip:hover{background:#D9EDF9;}
.mission-status{
  margin-top:14px;font-family:var(--mono);font-size:11.5px;color:var(--slate);display:flex;align-items:center;gap:8px;
}
.mission-status .pip{width:8px;height:8px;border-radius:50%;background:var(--line);}
.mission-status.done .pip{background:var(--ubam-green);}
.mission-status.done{color:var(--ubam-green);}

/* ===== Footer ===== */
footer.site{
  background:var(--ubam-navy);color:#9FB1BC;padding:46px 28px 30px;
}
.footer-inner{max-width:1080px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:18px;text-align:center;}
footer.site img{height:46px;filter:grayscale(1) brightness(1.6);opacity:.9;}
footer.site .fnote{font-family:var(--mono);font-size:11.5px;letter-spacing:.03em;color:#6C808C;}
footer.site .flinks{display:flex;gap:18px;font-family:var(--mono);font-size:11.5px;}
footer.site .flinks a{text-decoration:none;color:#9FB1BC;}
footer.site .flinks a:hover{color:var(--term-green);}