:root{
  --bg:#0A0E1A; --bg-2:#0d1424; --card:#111827; --card-2:#0f1726;
  --border:#1f2937; --text:#E2E8F0; --muted:#94A3B8;
  --accent:#00B4D8; --accent-2:#22D3EE; --green:#00FF9C;
  --red:#ef4444; --yellow:#facc15; --mono:'JetBrains Mono',ui-monospace,Menlo,monospace;
  --sans:'Inter',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
a{color:var(--accent);text-decoration:none;transition:.2s}
a:hover{color:var(--accent-2)}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}

/* NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(10,14,26,.8);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;max-width:1200px;margin:0 auto}
.brand{font-family:var(--mono);font-weight:700;font-size:1.05rem;color:var(--text)}
.brand .dot{color:var(--accent)}
.nav-links{display:flex;gap:1.5rem;list-style:none}
.nav-links a{color:var(--muted);font-size:.9rem;font-family:var(--mono)}
.nav-links a.active,.nav-links a:hover{color:var(--accent)}
.nav-right{display:flex;gap:.75rem;align-items:center}
.nav-right a{color:var(--muted)}
.burger{display:none;background:none;border:1px solid var(--border);color:var(--text);padding:.4rem .6rem;border-radius:6px;cursor:pointer;font-family:var(--mono)}

/* HERO */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;padding:8rem 0 4rem;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:url('images/hero-bg.jpg') center/cover no-repeat;opacity:.35;z-index:0}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 30% 40%,rgba(0,180,216,.18),transparent 60%),linear-gradient(180deg,rgba(10,14,26,.4),var(--bg) 90%);z-index:1}
.hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1.3fr 1fr;gap:3rem;align-items:center}
.hero-tag{display:inline-block;font-family:var(--mono);font-size:.8rem;color:var(--accent);border:1px solid var(--accent);padding:.25rem .6rem;border-radius:4px;margin-bottom:1.25rem}
.hero h1{font-family:var(--mono);font-size:clamp(2.2rem,5vw,4rem);font-weight:700;line-height:1.1;margin-bottom:1rem}
.hero h1 .cursor{display:inline-block;width:10px;background:var(--accent);animation:blink 1s steps(1) infinite;margin-left:4px;height:.9em;vertical-align:middle}
@keyframes blink{50%{opacity:0}}
.hero h2{font-family:var(--mono);color:var(--accent-2);font-size:1.05rem;margin-bottom:1.5rem;font-weight:500}
.hero p{color:var(--muted);font-size:1.05rem;max-width:560px;margin-bottom:2rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:.75rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.25rem;border-radius:8px;font-family:var(--mono);font-size:.9rem;font-weight:500;cursor:pointer;border:1px solid transparent;transition:.2s}
.btn-primary{background:var(--accent);color:#001018}
.btn-primary:hover{background:var(--accent-2);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,180,216,.3)}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.avatar-wrap{position:relative;display:flex;justify-content:center}
.avatar-wrap img{width:340px;height:340px;border-radius:50%;object-fit:cover;border:2px solid var(--accent);box-shadow:0 0 60px rgba(0,180,216,.35)}
.avatar-wrap::before{content:"";position:absolute;inset:-20px;border-radius:50%;border:1px dashed rgba(0,180,216,.4);animation:spin 30s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* SECTIONS */
section{padding:6rem 0;position:relative}
.section-head{margin-bottom:3rem}
.section-kicker{font-family:var(--mono);color:var(--accent);font-size:.85rem;margin-bottom:.5rem}
.section-title{font-family:var(--mono);font-size:clamp(1.8rem,3.5vw,2.6rem);color:var(--text);font-weight:700}
.section-title .num{color:var(--accent);margin-right:.5rem;font-weight:400}
.section-sub{color:var(--muted);margin-top:.75rem;max-width:680px}

/* ABOUT */
.about-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:3rem}
.about-text p{margin-bottom:1rem;color:var(--muted)}
.about-text strong{color:var(--text)}
.about-side{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.5rem}
.about-side h4{font-family:var(--mono);color:var(--accent);font-size:.85rem;margin-bottom:.75rem;text-transform:uppercase;letter-spacing:.05em}
.about-side ul{list-style:none;margin-bottom:1.5rem}
.about-side li{padding:.35rem 0;color:var(--muted);font-size:.95rem;display:flex;justify-content:space-between}
.about-side li span{color:var(--text)}
.tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:1.5rem}
.tag{font-family:var(--mono);font-size:.75rem;background:rgba(0,180,216,.08);color:var(--accent);border:1px solid rgba(0,180,216,.25);padding:.25rem .6rem;border-radius:4px}
.tag-group{margin-bottom:1.25rem}
.tag-group h5{font-family:var(--mono);color:var(--muted);font-size:.8rem;margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.05em}

/* TIMELINE */
.timeline{position:relative;padding-left:2rem;border-left:2px solid var(--border)}
.t-item{position:relative;margin-bottom:2.5rem;padding:1.5rem;background:var(--card);border:1px solid var(--border);border-radius:12px;transition:.3s}
.t-item:hover{border-color:var(--accent);transform:translateX(4px)}
.t-item::before{content:"";position:absolute;left:-2.6rem;top:1.75rem;width:14px;height:14px;border-radius:50%;background:var(--bg);border:2px solid var(--accent);box-shadow:0 0 0 4px rgba(0,180,216,.15)}
.t-period{font-family:var(--mono);color:var(--accent);font-size:.8rem;margin-bottom:.5rem}
.t-title{font-size:1.2rem;font-weight:600;margin-bottom:.25rem}
.t-org{color:var(--muted);margin-bottom:.75rem;font-size:.95rem}
.t-desc{color:var(--muted);margin-bottom:.75rem;font-size:.95rem}

/* CERTIFICATIONS */
.cert-filter{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem}
.cert-filter button{font-family:var(--mono);background:var(--card);border:1px solid var(--border);color:var(--muted);padding:.5rem 1rem;border-radius:6px;cursor:pointer;font-size:.85rem;transition:.2s}
.cert-filter button.active,.cert-filter button:hover{border-color:var(--accent);color:var(--accent);background:rgba(0,180,216,.08)}
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.25rem}
.cert{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.25rem;transition:.3s;display:flex;flex-direction:column;gap:.75rem}
.cert:hover{border-color:var(--accent);box-shadow:0 10px 30px rgba(0,180,216,.15);transform:translateY(-3px)}
.cert-top{display:flex;justify-content:space-between;align-items:flex-start;gap:.75rem}
.cert-vendor{font-family:var(--mono);font-size:.7rem;padding:.2rem .5rem;border-radius:4px;font-weight:600}
.v-cisco{background:rgba(59,130,246,.12);color:#60a5fa;border:1px solid #1d4ed8}
.v-ibm{background:rgba(239,68,68,.12);color:#fca5a5;border:1px solid #b91c1c}
.v-nukib{background:rgba(34,197,94,.12);color:#86efac;border:1px solid #15803d}
.v-other{background:rgba(250,204,21,.12);color:#fde047;border:1px solid #a16207}
.cert h3{font-size:1rem;font-weight:600;line-height:1.3}
.cert-meta{font-family:var(--mono);font-size:.75rem;color:var(--muted);display:flex;flex-direction:column;gap:.2rem}
.cert-meta b{color:var(--text);font-weight:500}
.cert-actions{margin-top:auto;display:flex;gap:.5rem}
.cert-link{font-family:var(--mono);font-size:.8rem;color:var(--accent);border:1px solid var(--accent);padding:.4rem .75rem;border-radius:6px;flex:1;text-align:center}
.cert-link:hover{background:var(--accent);color:#001018}
.cert-count{font-family:var(--mono);color:var(--muted);font-size:.9rem;margin-bottom:1rem}
.cert-count b{color:var(--accent)}

/* PROJECTS */
.proj-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem}
.proj{background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.proj:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,180,216,.18)}
.proj-img{aspect-ratio:16/10;background:var(--bg-2);overflow:hidden}
.proj-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.proj:hover .proj-img img{transform:scale(1.05)}
.proj-body{padding:1.25rem;display:flex;flex-direction:column;gap:.75rem;flex:1}
.proj-body h3{font-size:1.15rem;font-weight:600}
.proj-body p{color:var(--muted);font-size:.9rem;flex:1}
.proj-tags{display:flex;flex-wrap:wrap;gap:.35rem}
.proj-link{font-family:var(--mono);color:var(--accent);font-size:.85rem;display:inline-flex;gap:.4rem;align-items:center}

/* CONTACT */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.contact-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:2rem}
.contact-card h3{font-family:var(--mono);color:var(--accent);font-size:1rem;margin-bottom:1rem}
.contact-list{list-style:none}
.contact-list li{padding:.6rem 0;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;gap:1rem;font-size:.95rem}
.contact-list li:last-child{border:none}
.contact-list li b{color:var(--muted);font-family:var(--mono);font-size:.85rem;font-weight:500}
.form-row{margin-bottom:1rem}
.form-row label{display:block;font-family:var(--mono);font-size:.8rem;color:var(--muted);margin-bottom:.4rem}
.form-row input,.form-row textarea{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:.65rem .8rem;color:var(--text);font-family:var(--sans);font-size:.95rem;transition:.2s}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,180,216,.15)}
.form-row textarea{min-height:110px;resize:vertical}

/* FOOTER */
footer{border-top:1px solid var(--border);padding:2.5rem 0;margin-top:3rem;text-align:center;color:var(--muted);font-family:var(--mono);font-size:.85rem}
footer a{color:var(--accent)}

/* TOAST */
.toast{position:fixed;bottom:2rem;right:2rem;background:var(--card);border:1px solid var(--accent);color:var(--text);padding:1rem 1.25rem;border-radius:8px;font-family:var(--mono);font-size:.9rem;box-shadow:0 10px 30px rgba(0,0,0,.4);transform:translateY(20px);opacity:0;transition:.3s;z-index:100}
.toast.show{transform:translateY(0);opacity:1}

/* REVEAL */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}

/* RESPONSIVE */
@media (max-width:900px){
  .hero .container{grid-template-columns:1fr;text-align:center}
  .hero-cta{justify-content:center}
  .avatar-wrap img{width:240px;height:240px}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg-2);flex-direction:column;padding:1rem;border-top:1px solid var(--border)}
  .nav-links.open{display:flex}
  .burger{display:inline-block}
}