/* ============================================================
   Abdul Nafay — AI Engineer & Web Developer Portfolio
   Design tokens
   ============================================================ */
:root{
  --bg:#070a12;
  --bg-soft:#0b0f1c;
  --panel:#0e1424;
  --panel-border:rgba(255,255,255,.08);
  --text:#e8ecf7;
  --text-dim:#8b93a8;
  --text-faint:#5a6178;
  --accent:#3b6bff;
  --accent2:#22d3ee;
  --accent-warm:#ffb454;
  --grad:linear-gradient(120deg,#3b6bff 0%,#22d3ee 100%);
  --grad-soft:linear-gradient(120deg,rgba(59,107,255,.16),rgba(34,211,238,.10));
  --radius:18px;
  --radius-sm:10px;
  --shadow:0 20px 60px -20px rgba(0,0,0,.6);
  --font-display:'Space Grotesk',sans-serif;
  --font-body:'Inter',sans-serif;
  --ease:cubic-bezier(.16,.84,.44,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
::selection{background:var(--accent);color:#fff}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body.locked{overflow:hidden}

a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
img{max-width:100%;display:block}

h1,h2,h3{font-family:var(--font-display);margin:0;letter-spacing:-.01em}
p{margin:0}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* focus visibility */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent2);outline-offset:3px;border-radius:4px;
}

/* ============== background ambience ============== */
.glow{position:fixed;border-radius:50%;filter:blur(90px);z-index:0;pointer-events:none;opacity:.5}
.glow1{width:520px;height:520px;background:radial-gradient(circle,rgba(59,107,255,.55),transparent 70%);top:-180px;left:-140px}
.glow2{width:600px;height:600px;background:radial-gradient(circle,rgba(34,211,238,.35),transparent 70%);bottom:-220px;right:-160px}

.grain{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.03;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============== preloader ============== */
#preloader{
  position:fixed;inset:0;z-index:9999;background:var(--bg);
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:22px;
  transition:opacity .6s var(--ease),visibility .6s var(--ease);
}
#preloader.hide{opacity:0;visibility:hidden;pointer-events:none}
.pl-mark{width:96px;height:96px;position:relative}
.pl-mark svg{width:100%;height:100%}
.pl-mark path{
  fill:none;stroke:url(#plGrad);stroke-width:5.5;stroke-linecap:round;stroke-linejoin:round;
  stroke-dasharray:640;stroke-dashoffset:640;
  animation:draw 1.5s var(--ease) forwards;
}
@keyframes draw{to{stroke-dashoffset:0}}
.pl-bar{width:180px;height:2px;background:rgba(255,255,255,.08);border-radius:2px;overflow:hidden}
.pl-bar i{display:block;height:100%;width:0%;background:var(--grad);animation:load 1.8s var(--ease) forwards .2s}
@keyframes load{0%{width:0%}60%{width:75%}100%{width:100%}}
.pl-label{font-family:var(--font-display);font-size:.72rem;letter-spacing:.3em;color:var(--text-dim);text-transform:uppercase}

/* ============== layout shell ============== */
main{position:relative;z-index:2}
.section{max-width:1180px;margin:0 auto;padding:120px 32px}
@media (max-width:720px){.section{padding:90px 20px}}

.head{max-width:640px;margin-bottom:56px}
.head small{font-family:var(--font-display);color:var(--accent2);letter-spacing:.25em;font-size:.72rem;font-weight:600}
.head h2{font-size:clamp(1.8rem,3.4vw,2.6rem);margin:14px 0 12px;font-weight:600}
.head h2 span{color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text}
.head p{color:var(--text-dim);font-size:1.02rem}

.glass{
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.015));
  border:1px solid var(--panel-border);
  border-radius:var(--radius);
  backdrop-filter:blur(14px);
}

/* ============== header / nav ============== */
header{position:fixed;top:0;left:0;right:0;z-index:100;
  background:transparent;backdrop-filter:none;
  border-bottom:1px solid transparent;
  transition:background .4s var(--ease),backdrop-filter .4s var(--ease),border-color .4s var(--ease);
}
header.show{
  background:rgba(7,10,18,.72);backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.nav{max-width:1180px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:16px 32px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.02rem}
.logo span{
  display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:9px;
  background:var(--grad);color:#040611;font-size:.78rem;font-weight:800;letter-spacing:.02em;
}
.links{display:flex;gap:28px}
.links a{font-size:.9rem;color:var(--text-dim);position:relative;padding:4px 0;transition:color .25s}
.links a::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:1.5px;background:var(--grad);transition:width .3s var(--ease)}
.links a:hover,.links a.active{color:var(--text)}
.links a:hover::after,.links a.active::after{width:100%}
.menu{display:none;font-size:1.4rem;color:var(--text)}
@media (max-width:860px){
  .links{position:fixed;top:64px;left:0;right:0;background:var(--bg-soft);flex-direction:column;padding:18px 28px;gap:16px;
    border-bottom:1px solid var(--panel-border);transform:translateY(-140%);transition:transform .4s var(--ease);}
  .links.open{transform:translateY(0)}
  .menu{display:block}
}

/* ============== hero ============== */
.hero{min-height:100svh;display:flex;align-items:center;justify-content:space-between;gap:48px;flex-wrap:wrap;padding-top:150px}
.hero-text{flex:1 1 480px;max-width:620px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-display);font-size:.72rem;letter-spacing:.2em;
  color:var(--accent2);border:1px solid rgba(34,211,238,.3);padding:6px 14px;border-radius:99px;margin-bottom:22px}
.eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent2);box-shadow:0 0 0 0 rgba(34,211,238,.6);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(34,211,238,.5)}70%{box-shadow:0 0 0 8px rgba(34,211,238,0)}100%{box-shadow:0 0 0 0 rgba(34,211,238,0)}}
.hello{font-family:var(--font-display);font-size:1.05rem;color:var(--text-dim);min-height:1.6em;margin-bottom:14px}
.hello .cursor{display:inline-block;width:2px;height:1em;background:var(--accent2);margin-left:2px;vertical-align:middle;animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}
.hero h1{font-size:clamp(2.4rem,6vw,4.1rem);font-weight:700;line-height:1.04;margin-bottom:20px}
.hero h1 span{color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text}
.hero .lead{color:var(--text-dim);font-size:1.08rem;max-width:520px;margin-bottom:34px}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:12px;font-weight:600;font-size:.92rem;
  border:1px solid var(--panel-border);color:var(--text);transition:transform .25s var(--ease),border-color .25s,background .25s}
.btn:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.25)}
.btn.primary{background:var(--grad);color:#040611;border:none}
.btn.primary:hover{box-shadow:0 12px 30px -8px rgba(59,107,255,.55)}
.stats{display:flex;gap:36px;flex-wrap:wrap}
.stats div{display:flex;flex-direction:column}
.stats b{font-family:var(--font-display);font-size:1.5rem}
.stats small{color:var(--text-faint);font-size:.78rem;letter-spacing:.03em}

.hero-art{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:26px}
.orb{position:relative;width:210px;height:210px;border-radius:50%;
  background:radial-gradient(circle at 32% 28%,rgba(255,255,255,.14),rgba(59,107,255,.22) 40%,rgba(9,12,22,.4) 75%);
  border:1px solid rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:800;font-size:2.2rem;color:#fff;
  box-shadow:0 0 80px -10px rgba(59,107,255,.5), inset 0 0 40px rgba(34,211,238,.15);
  animation:float 6s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
.orb i{position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.16)}
.orb i:nth-child(1){inset:-18px;animation:spin 14s linear infinite}
.orb i:nth-child(2){inset:-34px;border-style:dashed;opacity:.5;animation:spin 22s linear infinite reverse}
@keyframes spin{to{transform:rotate(360deg)}}
.code{font-family:'Space Grotesk',monospace;font-size:.82rem;color:var(--text-dim);padding:18px 20px;max-width:260px;line-height:1.9}
.code em{color:var(--accent2);font-style:normal}
.code span{color:#ff9d6f}

/* ============== about ============== */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media (max-width:860px){.cards{grid-template-columns:1fr}}
.cards article{padding:30px 26px;transition:transform .3s var(--ease),border-color .3s}
.cards article:hover{transform:translateY(-6px);border-color:rgba(59,107,255,.35)}
.cards b{font-family:var(--font-display);font-size:.85rem;color:var(--accent2);display:block;margin-bottom:14px;letter-spacing:.1em}
.cards h3{font-size:1.15rem;margin-bottom:10px}
.cards p{color:var(--text-dim);font-size:.94rem}

/* ============== skills ============== */
.skills{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 24px;margin-bottom:26px}
@media (max-width:720px){.skills{grid-template-columns:1fr}}
.skill{padding:16px 20px;border-radius:var(--radius-sm)}
.skill>div{display:flex;justify-content:space-between;font-size:.9rem;margin-bottom:9px}
.skill b{font-weight:600}
.skill span{color:var(--text-faint);font-family:var(--font-display)}
.bar{height:5px;border-radius:4px;background:rgba(255,255,255,.07);overflow:hidden}
.bar i{display:block;height:100%;background:var(--grad);border-radius:4px;transform:scaleX(0);transform-origin:left;transition:transform 1s var(--ease)}
.skill.in-view .bar i{transform:scaleX(1)}

.more{display:block;margin:0 auto;padding:11px 26px;border:1px solid var(--panel-border);border-radius:99px;font-size:.85rem;color:var(--text-dim);transition:.25s}
.more:hover{border-color:var(--accent2);color:var(--text)}

/* ============== projects ============== */
.projects{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:26px}
@media (max-width:960px){.projects{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.projects{grid-template-columns:1fr}}
.project{overflow:hidden;cursor:pointer;transition:transform .35s var(--ease),border-color .35s}
.project:hover{transform:translateY(-6px);border-color:rgba(34,211,238,.4)}
.project .thumb{width:100%;aspect-ratio:16/10;object-fit:cover;background:#0d1220}
.project>div{padding:20px}
.project small{font-family:var(--font-display);font-size:.68rem;letter-spacing:.12em;color:var(--accent-warm)}
.project small.placeholder{color:var(--text-faint)}
.project h3{font-size:1.02rem;margin:9px 0 8px}
.project p{color:var(--text-dim);font-size:.88rem;min-height:2.6em}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.tags span{font-size:.72rem;color:var(--text-dim);border:1px solid var(--panel-border);padding:3px 10px;border-radius:99px}

/* ============== certificates ============== */
.certs{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:26px}
@media (max-width:960px){.certs{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.certs{grid-template-columns:1fr}}
.cert{overflow:hidden;cursor:pointer;transition:transform .35s var(--ease),border-color .35s}
.cert:hover{transform:translateY(-6px);border-color:rgba(255,180,84,.4)}
.cert .thumb-wrap{position:relative;aspect-ratio:4/3;overflow:hidden;background:#0d1220}
.cert .thumb-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.cert:hover .thumb-wrap img{transform:scale(1.06)}
.cert .badge{position:absolute;top:10px;right:10px;background:rgba(6,9,16,.75);backdrop-filter:blur(6px);
  border:1px solid rgba(255,180,84,.4);color:var(--accent-warm);font-family:var(--font-display);font-size:.62rem;
  letter-spacing:.08em;padding:4px 9px;border-radius:99px}
.cert>div{padding:18px 20px}
.cert small{font-family:var(--font-display);font-size:.68rem;letter-spacing:.1em;color:var(--accent2)}
.cert h3{font-size:.98rem;margin:8px 0 4px}
.cert p{color:var(--text-dim);font-size:.85rem}

/* ============== education / hire ============== */
.education,.hire{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:46px;flex-wrap:wrap}
.education small,.hire small{font-family:var(--font-display);color:var(--accent2);letter-spacing:.2em;font-size:.7rem}
.education h2,.hire h2{font-size:1.7rem;margin:12px 0 8px}
.education h2 span,.hire h2 span{color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text}
.education h3{font-size:1.1rem;color:var(--text);margin-bottom:6px}
.education p,.hire p{color:var(--text-dim)}
.edu-icon{width:110px;height:110px;border-radius:22px;background:var(--grad);display:flex;flex-direction:column;
  align-items:center;justify-content:center;font-family:var(--font-display);font-weight:800;color:#040611;font-size:1.6rem;flex-shrink:0}
.edu-icon small{color:#040611;opacity:.7;font-size:.65rem;margin-top:2px}
.hire-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============== social ============== */
.socials{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media (max-width:640px){.socials{grid-template-columns:1fr}}
.socials a{display:flex;align-items:center;gap:16px;padding:22px 24px;transition:transform .3s var(--ease),border-color .3s}
.socials a:hover{transform:translateY(-4px);border-color:rgba(59,107,255,.4)}
.socials svg{width:30px;height:30px;flex-shrink:0;color:var(--accent2)}
.socials b{display:block;font-size:1rem;font-weight:600}
.socials span{color:var(--text-dim);font-size:.85rem}

/* ============== contact ============== */
.contact form{padding:40px;display:flex;flex-direction:column;gap:18px}
.contact label{display:flex;flex-direction:column;gap:8px;font-size:.85rem;color:var(--text-dim);font-weight:500}
.contact input,.contact textarea{
  background:rgba(255,255,255,.03);border:1px solid var(--panel-border);border-radius:10px;
  padding:13px 16px;color:var(--text);font-family:var(--font-body);font-size:.95rem;resize:vertical;transition:border-color .25s;
}
.contact input:focus,.contact textarea:focus{border-color:var(--accent2);outline:none}
.contact button{align-self:flex-start;margin-top:6px}
#status{font-size:.85rem;color:var(--accent2);min-height:1.2em}
#status.error{color:#ff6b6b}

footer{text-align:center;padding:34px 20px;color:var(--text-faint);font-size:.82rem;border-top:1px solid var(--panel-border);position:relative;z-index:2}

/* ============== modal ============== */
.modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:24px;
  background:rgba(4,6,12,.75);backdrop-filter:blur(6px);opacity:0;visibility:hidden;transition:opacity .35s var(--ease),visibility .35s var(--ease)}
.modal.open{opacity:1;visibility:visible}
.modal-box{max-width:640px;width:100%;max-height:86vh;overflow:auto;position:relative;transform:translateY(24px) scale(.97);transition:transform .35s var(--ease)}
.modal.open .modal-box{transform:translateY(0) scale(1)}
.modal-box img{width:100%;border-radius:var(--radius) var(--radius) 0 0;max-height:340px;object-fit:cover;background:#0d1220}
.modal-content{padding:26px 28px 30px}
.modal-content small{font-family:var(--font-display);color:var(--accent-warm);letter-spacing:.1em;font-size:.72rem}
.modal-content h2{font-size:1.3rem;margin:10px 0 12px}
.modal-content p{color:var(--text-dim);font-size:.95rem;margin-bottom:16px}
.close{position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:50%;background:rgba(6,9,16,.7);
  color:#fff;font-size:1.3rem;display:flex;align-items:center;justify-content:center;z-index:2;transition:background .25s}
.close:hover{background:rgba(255,255,255,.15)}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:translateY(0)}