:root{
    --bg:#0f1724;
    --card:#0b1220;
    --muted:#9aa4b2;
    --accent:#4f46e5;
    --text:#e6eef6;
    --radius:10px;
    --gap:1rem;
    --max-width:1100px;
    font-synthesis: none;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
    margin:0;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    background:linear-gradient(180deg,#7d1bbe 0%, var(--bg) 100%);
    color:var(--text);
    line-height:1.5;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
}

/* Layout wrapper */
main{max-width:var(--max-width);margin:2rem auto;padding:0 1rem}

/* Header / Nav */
header{padding:1rem 0}
nav{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{font-weight:700;color:var(--text);text-decoration:none}
#nav-list{list-style:none;margin:0;padding:0;display:flex;gap:1rem;align-items:center}
#nav-list a{color:var(--muted);text-decoration:none;padding:0.35rem 0.5rem;border-radius:6px}
#nav-list a:hover,#nav-list a:focus{color:var(--text);background:rgba(255,255,255,0.02)}

/* Mobile toggle */
#nav-toggle{display:none;background:transparent;border:0;color:var(--text);font-size:1.2rem;padding:0.25rem 0.5rem}
@media (max-width:720px){
    #nav-toggle{display:block}
    #nav-list{position:absolute;right:1rem;top:56px;flex-direction:column;background:rgba(6,10,16,0.9);backdrop-filter:blur(6px);padding:0.5rem;border-radius:8px;display:none;min-width:140px}
    #nav-list.open{display:flex}
}

/* Hero */
#hero{display:grid;gap:1rem;padding:2.25rem 0}
#hero h1{margin:0;font-size:clamp(1.6rem,3.5vw,2.6rem)}
#hero p{color:var(--muted);margin:0 0 0.75rem 0}

/* Button */
.btn{display:inline-block;background:#0658d4;color:white;padding:0.6rem 0.9rem;border-radius:8px;text-decoration:none;font-weight:600;box-shadow:0 6px 18px rgba(79,70,229,0.14)}
.btn:focus{outline:3px solid rgba(79,70,229,0.25);outline-offset:2px}

/* Sections */
section{margin:2rem 0;padding:1rem 0;border-radius:var(--radius)}
#about,#projects,#contact{background:linear-gradient(180deg, rgba(255,255,255,0.01), transparent);padding:1.25rem}

/* Projects grid */
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.project-card{background:var(--card);padding:1rem;border-radius:10px;box-shadow:0 6px 20px rgba(2,6,23,0.6)}
.project-card h3{margin:0 0 0.5rem 0}
.project-card p{margin:0;color:var(--muted);font-size:0.95rem}

@media (max-width:980px){
    .projects-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
    .projects-grid{grid-template-columns:1fr}
}

/* Footer */
footer{max-width:var(--max-width);margin:2rem auto;color:var(--muted);padding:0 1rem}
footer p{margin:0;font-size:0.9rem}

/* Utility */
.hidden{display:none}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}