:root{
  --bg:#0A0E1A; --surface:#131A2A; --teal:#00E0C6;
  --blue:#3B82F6; --text:#E6EDF3; --muted:#94A3B8;
  --border:rgba(255,255,255,.06); --shadow:rgba(0,0,0,.5);
  --radius:16px;
}
/* LIGHT MODE */
[data-theme="light"]{
  --bg:#F4F7FB; --surface:#FFFFFF; --teal:#0EA5A4;
  --blue:#2563EB; --text:#0F172A; --muted:#5B6472;
  --border:rgba(0,0,0,.08); --shadow:rgba(0,0,0,.12);
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'Inter',sans-serif;background:var(--bg);color:var(--text);
  line-height:1.6;overflow-x:hidden;transition:background .4s,color .4s;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;}
.container{max-width:1150px;margin:0 auto;padding:0 20px;}
section{padding:80px 0;}
.accent{color:var(--teal);}

/* NAVBAR */
header{position:fixed;top:0;width:100%;z-index:1000;transition:.3s;}
header.scrolled{background:color-mix(in srgb,var(--bg) 85%,transparent);
  backdrop-filter:blur(12px);box-shadow:0 4px 20px var(--shadow);}
nav{display:flex;justify-content:space-between;align-items:center;padding:18px 0;}
.logo{font-weight:800;font-size:1.3rem;}
.logo span{color:var(--teal);}
.nav-right{display:flex;align-items:center;gap:24px;}
.nav-links{display:flex;gap:26px;}
.nav-links a{color:var(--muted);font-weight:500;transition:.2s;}
.nav-links a:hover,.nav-links a.active{color:var(--teal);}

/* THEME TOGGLE */
.theme-btn{background:var(--surface);border:1px solid var(--border);cursor:pointer;
  width:42px;height:42px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;font-size:1.1rem;transition:.3s;color:var(--text);}
.theme-btn:hover{border-color:var(--teal);transform:rotate(20deg);}

.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;}
.hamburger span{width:26px;height:3px;background:var(--text);border-radius:3px;transition:.3s;}

/* PAGE HEADER (sub pages) */
.page-head{padding-top:150px;padding-bottom:40px;text-align:center;}
.page-head h1{font-size:2.6rem;font-weight:800;}
.page-head p{color:var(--muted);margin-top:8px;}
.crumb{color:var(--muted);font-size:.9rem;margin-top:6px;}
.crumb a:hover{color:var(--teal);}

/* HERO */
.hero{display:flex;align-items:center;min-height:100vh;gap:50px;flex-wrap:wrap;padding-top:110px;}
.hero-text{flex:1;min-width:300px;}
.hero-text h1{font-size:3rem;font-weight:800;line-height:1.15;margin-bottom:16px;}
.hero-text .role{font-size:1.4rem;color:var(--teal);font-weight:600;min-height:34px;margin-bottom:14px;}
.hero-text p{color:var(--muted);max-width:520px;margin-bottom:28px;}
.hero-img{flex:0 0 320px;display:flex;justify-content:center;}
.hero-img img{width:300px;height:300px;object-fit:cover;border-radius:50%;
  border:4px solid var(--teal);box-shadow:0 0 45px rgba(0,224,198,.35);}

.btn{display:inline-block;padding:13px 30px;border-radius:50px;font-weight:600;transition:.3s;cursor:pointer;}
.btn-primary{background:linear-gradient(135deg,var(--teal),var(--blue));color:#04121a;}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 10px 25px rgba(0,224,198,.35);}
.btn-ghost{border:1px solid var(--muted);color:var(--text);margin-left:12px;}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal);}

/* SECTION TITLE */
.sec-title{text-align:center;margin-bottom:50px;}
.sec-title h2{font-size:2.2rem;font-weight:800;}
.sec-title p{color:var(--muted);margin-top:8px;}

/* ABOUT */
.about{display:flex;gap:40px;flex-wrap:wrap;align-items:center;}
.about img{flex:1;min-width:280px;max-width:420px;border-radius:var(--radius);box-shadow:0 20px 40px var(--shadow);}
.about .txt{flex:1;min-width:280px;color:var(--muted);}
.about .txt h3{color:var(--text);font-size:1.6rem;margin-bottom:14px;}

/* GRID / CARDS */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;}
.card{background:var(--surface);padding:30px;border-radius:var(--radius);border:1px solid var(--border);transition:.3s;}
.card:hover{transform:translateY(-8px);border-color:var(--teal);box-shadow:0 15px 35px rgba(0,224,198,.12);}
.card .icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--teal),var(--blue));
  display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin-bottom:18px;}
.card h3{margin-bottom:10px;}
.card p{color:var(--muted);font-size:.95rem;}

/* PORTFOLIO */
.portfolio-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;}
.project{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--surface);border:1px solid var(--border);}
.project img{width:100%;height:220px;object-fit:cover;display:block;transition:.4s;}
.project:hover img{transform:scale(1.08);}
.project .info{padding:18px;}
.project .info span{color:var(--teal);font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:1px;}
.project .info h3{margin-top:6px;font-size:1.1rem;}
.project .info p{color:var(--muted);font-size:.9rem;margin-top:6px;}

/* CONTACT */
.contact-box{background:linear-gradient(135deg,rgba(0,224,198,.08),rgba(59,130,246,.08));
  border:1px solid rgba(0,224,198,.2);border-radius:24px;padding:45px 35px;}
.form-group{margin-bottom:18px;}
.form-group label{display:block;margin-bottom:6px;font-weight:500;font-size:.95rem;}
.form-group input,.form-group textarea{width:100%;padding:13px 16px;border-radius:12px;
  background:var(--bg);border:1px solid var(--border);color:var(--text);font-family:inherit;font-size:.95rem;}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--teal);}
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;}
.info-item{display:flex;gap:14px;align-items:center;margin-bottom:22px;}
.info-item .ic{width:48px;height:48px;border-radius:12px;background:var(--surface);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;font-size:1.3rem;}
.info-item h4{font-size:1rem;} .info-item p{color:var(--muted);font-size:.9rem;}

/* FOOTER */
footer{background:var(--surface);padding:45px 0 30px;text-align:center;border-top:1px solid var(--border);}
.socials{display:flex;justify-content:center;gap:16px;margin-bottom:22px;flex-wrap:wrap;}
.socials a{display:flex;align-items:center;gap:8px;background:var(--bg);padding:10px 18px;border-radius:50px;
  color:var(--muted);font-weight:500;transition:.3s;border:1px solid var(--border);}
.socials a:hover{color:var(--teal);border-color:var(--teal);transform:translateY(-3px);}
footer .copy{color:var(--muted);font-size:.9rem;}

/* REVEAL */
.reveal{opacity:0;transform:translateY(40px);transition:.7s ease;}
.reveal.show{opacity:1;transform:translateY(0);}

/* RESPONSIVE */
@media(max-width:820px){
  .hamburger{display:flex;}
  .nav-links{position:fixed;top:0;right:-100%;height:100vh;width:70%;background:var(--surface);
    flex-direction:column;justify-content:center;align-items:center;gap:34px;transition:.4s;z-index:999;}
  .nav-links.open{right:0;}
  .hero-text h1{font-size:2.2rem;}
  .btn-ghost{margin-left:0;margin-top:10px;}
  .contact-wrap{grid-template-columns:1fr;}
}