:root{
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --ink: #14161c;
  --ink-soft: #5c6270;
  --line: #e7e8ec;
  --accent: #3d5afe;
  --accent-ink: #ffffff;
  --radius: 14px;
  --max: 1080px;
  --font-head: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{
  font-family:var(--font-head);
  line-height:1.15;
  margin:0 0 .5em;
  letter-spacing:-0.01em;
}
p{margin:0 0 1em;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
ul{margin:0;padding:0;list-style:none;}

.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding:0 24px;
}

.eyebrow{
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:.75em;
}
.center{text-align:center;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:.85em 1.6em;
  border-radius:999px;
  font-weight:600;
  font-size:.95rem;
  border:1.5px solid transparent;
  transition:transform .15s ease, background .15s ease, border-color .15s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{background:var(--accent);}
.btn-ghost{border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);}
.btn-large{padding:1em 2.2em;font-size:1.05rem;}
.btn-small{padding:.6em 1.3em;font-size:.85rem;}

/* header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:40px;
  height:72px;
}
.logo{
  font-family:var(--font-head);
  font-weight:700;
  font-size:1.15rem;
  flex-shrink:0;
}
.logo span{color:var(--accent);}
.nav{display:flex;gap:32px;margin-right:auto;}
.nav a{font-weight:500;font-size:.95rem;color:var(--ink-soft);white-space:nowrap;}
.nav a:hover{color:var(--ink);}
.nav-cta{flex-shrink:0;}
.nav-cta-inline{display:none;}

.lang-switch{display:flex;gap:6px;}
.lang-btn{
  background:none;
  border:1.5px solid var(--line);
  color:var(--ink-soft);
  font-family:var(--font-body);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.02em;
  padding:.3em .65em;
  border-radius:999px;
  cursor:pointer;
  transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.lang-btn:hover{border-color:var(--ink);color:var(--ink);}
.lang-btn.active{background:var(--ink);color:#fff;border-color:var(--ink);}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:38px;height:38px;
  background:none;border:none;cursor:pointer;
  padding:0;
}
.nav-toggle span{
  display:block;height:2px;width:100%;
  background:var(--ink);
  transition:transform .2s ease, opacity .2s ease;
}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* hero */
.hero{
  position:relative;
  padding:120px 0 100px;
  overflow:hidden;
}
.hero-inner{position:relative;z-index:1;max-width:760px;}
.hero h1{
  font-size:clamp(2.4rem, 5.5vw, 4rem);
  font-weight:700;
}
.accent{color:var(--accent);}
.hero-sub{
  font-size:1.15rem;
  color:var(--ink-soft);
  max-width:520px;
}
.hero-actions{display:flex;gap:14px;margin-top:1.5em;flex-wrap:wrap;}
.hero-bg{
  position:absolute;
  top:-200px;right:-200px;
  width:600px;height:600px;
  background:radial-gradient(circle at center, var(--accent) 0%, transparent 70%);
  opacity:.08;
  border-radius:50%;
  pointer-events:none;
}

/* about */
.about{padding:90px 0;background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.about-inner{
  display:grid;
  grid-template-columns:220px 1fr;
  gap:64px;
  align-items:start;
}
.photo-real{
  width:180px;height:180px;
  border-radius:50%;
  object-fit:cover;
  display:block;
}
.about-text h2{font-size:1.7rem;}
.about-text p{color:var(--ink-soft);max-width:520px;}
.skills{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:1.5em;
}
.skills li{
  padding:.5em 1.1em;
  background:#fff;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:.85rem;
  font-weight:500;
}

/* projects */
.projects{padding:110px 0;}
.section-title{font-size:clamp(1.8rem,3.5vw,2.4rem);max-width:640px;margin-left:auto;margin-right:auto;}
.section-sub{color:var(--ink-soft);max-width:560px;margin:1em auto 0;font-size:1.05rem;}
.project-list{
  margin-top:60px;
  display:flex;
  flex-direction:column;
  gap:56px;
}
.project{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:48px;
  align-items:center;
}
.project:nth-child(2n){direction:rtl;}
.project:nth-child(2n) .project-body{direction:ltr;}
.project-visual{
  display:block;
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  transition:transform .2s ease;
}
.project-visual:hover{transform:translateY(-4px);}
.project-visual svg{display:block;width:100%;height:auto;}
.wip-badge{
  position:absolute;
  top:16px;right:16px;
  background:var(--ink);
  color:#fff;
  font-size:.72rem;
  font-weight:600;
  padding:.4em .9em;
  border-radius:999px;
}
.project-status{
  font-size:.85rem;
  font-weight:600;
  color:var(--ink-soft);
}
.project-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.project-body h3{font-size:1.4rem;}
.project-tags{display:flex;gap:8px;flex-wrap:wrap;}
.project-tags span{
  font-size:.75rem;font-weight:600;
  color:var(--accent);
  background:rgba(61,90,254,.08);
  padding:.35em .8em;border-radius:999px;
}
.project-body p{color:var(--ink-soft);margin-top:.75em;}
.project-links{display:flex;gap:20px;margin-top:.5em;}
.project-links a{font-weight:600;font-size:.9rem;border-bottom:1.5px solid var(--ink);}
.project-links a:hover{color:var(--accent);border-color:var(--accent);}

/* contact */
.contact{padding:110px 0 130px;background:var(--bg-soft);border-top:1px solid var(--line);}
.contact-inner{max-width:560px;margin:0 auto;}
.contact-sub{color:var(--ink-soft);font-size:1.05rem;}
.socials{display:flex;gap:28px;justify-content:center;margin-top:2em;}
.socials a{font-weight:600;font-size:.9rem;color:var(--ink-soft);}
.socials a:hover{color:var(--ink);}

/* footer */
.site-footer{padding:32px 0;}
.footer-inner{
  display:flex;justify-content:space-between;align-items:center;
  font-size:.85rem;color:var(--ink-soft);
}
.footer-inner a:hover{color:var(--ink);}

/* reveal animation */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease, transform .6s ease;}
.reveal.visible{opacity:1;transform:none;}

/* responsive */
@media (max-width:860px){
  .about-inner{grid-template-columns:1fr;gap:32px;}
  .photo-real{width:120px;height:120px;}
  .project{grid-template-columns:1fr;}
  .project:nth-child(2n){direction:ltr;}
}

@media (max-width:720px){
  .nav, .nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .site-header .nav{
    position:absolute;
    top:72px;left:0;right:0;
    background:#fff;
    border-bottom:1px solid var(--line);
    flex-direction:column;
    align-items:flex-start;
    padding:16px 24px 24px;
    gap:16px;
  }
  .site-header .nav.open{display:flex;}
  .nav-cta-inline{display:inline-flex;margin-top:8px;}
  .hero{padding:80px 0 70px;}
}