:root{--bg:#0f0f10;--fg:#ffffff;--muted:#c2c0c0;--link:#ffffff;--maxw:1120px;--radius:14px;--border:rgba(255,255,255,.18);}
body.theme-light{--bg:#ffffff;--fg:#111827;--muted:#4b5563;--link:#1f2937;--border:rgba(0,0,0,.12);}
*{box-sizing:border-box;}
html,body{height:100%;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--fg);line-height:1.35;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
a{color:var(--link);text-decoration-thickness:.08em;text-underline-offset:.15em;}
a:hover{text-decoration:underline;}

.frame{max-width:var(--maxw);margin:40px auto 80px;padding:clamp(12px,2vw,24px);border-radius:var(--radius);position:relative;z-index:1;}

.topbar{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;gap:16px;font-weight:600;letter-spacing:.1px;background:var(--bg);padding:14px clamp(12px,2vw,24px);margin:-14px calc(-1 * clamp(12px,2vw,24px)) 0;border-bottom:1px solid rgba(255,255,255,.12);}
body.theme-light .topbar{border-bottom:1px solid rgba(0,0,0,.08);}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:clamp(22px,2.8vw,28px);}
.links{display:flex;gap:18px;flex-wrap:wrap;font-size:14px;align-items:center;}
.links a.active{text-decoration:underline;text-decoration-thickness:.12em;text-underline-offset:.32em;font-weight:800;}
.theme-toggle{display:inline-flex;align-items:center;gap:8px;padding:.5rem .7rem;border-radius:999px;border:1px solid rgba(255,255,255,.22);background:transparent;color:var(--fg);cursor:pointer;font-weight:700;font-size:13px;}
body.theme-light .theme-toggle{border-color:rgba(0,0,0,.18);}

.hero{margin-top:clamp(28px,3vw,48px);}
.hero h1{margin:0;line-height:1.05;letter-spacing:-0.02em;max-width:34ch;}
.fluid-title{font-size:clamp(36px,8vw,128px);text-wrap:balance;}
@media (min-width:1600px){.fluid-title{font-size:clamp(42px,7vw,140px);}}
.rb{display:none;}
@media (min-width:540px){.rb{display:inline;}}
.hero h2{margin:.4rem 0 0;font-size:clamp(18px,2.6vw,28px);}
.hero p{margin:18px 0 0;max-width:60ch;font-size:clamp(16px,1.6vw,20px);color:var(--muted);}

section{padding-top:clamp(36px,6vw,72px);border-top:1px solid rgba(255,255,255,.12);margin-top:clamp(36px,6vw,72px);scroll-margin-top:76px;}
body.theme-light section{border-top:1px solid rgba(0,0,0,.08);}
.section-title{font-size:clamp(14px,1.2vw,16px);letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin-bottom:18px;}

.projects{display:grid;grid-template-columns:1fr;gap:18px;}
.project-card{border:1px solid var(--border);border-radius:12px;padding:clamp(16px,2vw,22px);background:transparent;transition:transform .08s ease,box-shadow .08s ease;}
.project-card:hover{transform:translateY(-2px);box-shadow:0 6px 0 rgba(255,255,255,.12);}
body.theme-light .project-card:hover{box-shadow:0 6px 0 rgba(0,0,0,.08);}
.project-card h3{margin:0 0 6px;font-size:clamp(20px,2.2vw,28px);letter-spacing:-0.01em;}
.project-card p{margin:0;color:var(--muted);font-size:15.5px;}
.project-meta{margin-top:10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.tag{display:inline-block;border:1px solid rgba(255,255,255,.28);padding:.22rem .5rem;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.04em;}
body.theme-light .tag{border-color:rgba(0,0,0,.22);}

.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px;}
.btn{appearance:none;border:none;background:var(--fg);color:var(--bg);padding:.8rem 1.1rem;border-radius:999px;font-weight:700;cursor:pointer;font-size:14px;letter-spacing:.02em;text-decoration:none;display:inline-block;}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid rgba(255,255,255,.22);}
body.theme-light .btn.ghost{border-color:rgba(0,0,0,.18);}
.btn.small{padding:.55rem .9rem;font-size:13px;}

form.contact{display:grid;gap:14px;max-width:720px;}
.field{display:grid;gap:6px;}
label{font-weight:700;font-size:14px;letter-spacing:.02em;}
input[type="text"],input[type="email"],textarea{width:100%;padding:.85rem 1rem;border-radius:12px;border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.12);color:var(--fg);font-size:15px;outline:none;}
textarea{min-height:140px;resize:vertical;}
input::placeholder,textarea::placeholder{color:rgba(255,255,255,.55);}
input:focus,textarea:focus{border-color:rgba(255,255,255,.6);box-shadow:0 0 0 3px rgba(0,0,0,.08);}
body.theme-light input[type="text"],body.theme-light input[type="email"],body.theme-light textarea{background:rgba(0,0,0,.03);border-color:rgba(0,0,0,.18);color:var(--fg);}
body.theme-light input::placeholder,body.theme-light textarea::placeholder{color:rgba(0,0,0,.45);}
body.theme-light input:focus,body.theme-light textarea:focus{border-color:rgba(0,0,0,.55);box-shadow:0 0 0 3px rgba(0,0,0,.06);}

.status{font-size:14px;margin-top:4px;min-height:1.2em;}
.hidden{position:absolute!important;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden;}

.page-illustration{position:fixed;right:0;bottom:0;width:50vw;height:50vh;background:url('sapiens.png') right bottom/contain no-repeat;pointer-events:none;z-index:0;opacity:.6;}
@media (max-width:640px){.page-illustration{display:none;}}

#about .about-grid{display:grid;grid-template-columns:230px 1fr;gap:24px;align-items:start;}
.about-photo{width:230px;height:230px;border-radius:50%;object-fit:cover;border:0;box-shadow:0 6px 0 rgba(255,255,255,.08);background:#fff;justify-self:start;}
body.theme-light .about-photo{box-shadow:0 6px 0 rgba(0,0,0,.06);}
@media (max-width:720px){#about .about-grid{grid-template-columns:1fr;}.about-photo{justify-self:center;margin-top:6px;}}

@media (min-width:1024px){.frame{max-width:1280px;padding-left:20px;padding-right:20px;}.hero h1{max-width:40ch;}}
@media (min-width:1440px){.frame{max-width:1440px;padding-left:16px;padding-right:16px;}.hero h1{max-width:none;}}
@media (max-width:640px){
  .topbar{flex-direction:column;align-items:center;gap:8px;padding:12px 16px;}
  .brand{font-size:20px;}
  .links{width:100%;justify-content:center;gap:10px 16px;flex-wrap:wrap;overflow:visible;white-space:normal;}
  .btn.small{padding:.5rem .8rem;font-size:12px;}
}