/* alrobles.github.io — modernized 2026 */
:root{--bg:#fdfdfc;--surface:#ffffff;--surface-alt:#f5f6f4;--border:#e3e6e1;--text:#1c2321;--muted:#5a6660;--accent:#1f7a3a;--accent-hover:#155c29;--link:#1f7a3a;--shadow:0 1px 2px rgba(15,23,20,.04),0 4px 12px rgba(15,23,20,.06);--radius:10px;--maxw:880px;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
:root[data-theme="dark"]{--bg:#0f1411;--surface:#161c19;--surface-alt:#1c2420;--border:#2a322d;--text:#e6ebe7;--muted:#9aa5a0;--accent:#5cd17e;--accent-hover:#7adf94;--link:#5cd17e;--shadow:0 1px 2px rgba(0,0,0,.4),0 4px 12px rgba(0,0,0,.3)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#0f1411;--surface:#161c19;--surface-alt:#1c2420;--border:#2a322d;--text:#e6ebe7;--muted:#9aa5a0;--accent:#5cd17e;--accent-hover:#7adf94;--link:#5cd17e;--shadow:0 1px 2px rgba(0,0,0,.4),0 4px 12px rgba(0,0,0,.3)}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;border-top:3px solid var(--accent);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 1.25rem}
main{flex:1 0 auto}
a{color:var(--link);text-decoration:none;border-bottom:1px solid transparent;transition:color .15s ease,border-color .15s ease}
a:hover,a:focus{color:var(--accent-hover);border-bottom-color:currentColor}
a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}
h1,h2,h3,h4{font-weight:600;line-height:1.25;letter-spacing:-.01em;margin:0 0 .75rem}
h1{font-size:2.1rem;letter-spacing:-.02em}
h2{font-size:1.45rem;margin-top:2.5rem}
h3{font-size:1.15rem}
p{margin:0 0 1rem}
code{font-family:var(--mono);font-size:.92em;background:var(--surface-alt);padding:.1em .35em;border-radius:4px;border:1px solid var(--border)}
hr{border:0;border-top:1px solid var(--border);margin:2.5rem 0}

/* Header / nav */
.site-header{padding:1.25rem 0;border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:10;backdrop-filter:saturate(180%) blur(8px)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{font-weight:600;color:var(--text);border:0;font-size:1rem;letter-spacing:.01em}
.brand:hover{color:var(--accent)}
.nav-links{display:flex;gap:1.25rem;align-items:center;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--muted);font-size:.92rem;text-transform:uppercase;letter-spacing:.06em;border:0}
.nav-links a:hover,.nav-links a:focus{color:var(--accent)}
.theme-toggle{background:transparent;border:1px solid var(--border);color:var(--muted);width:36px;height:36px;border-radius:8px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:1rem;transition:background .15s ease,color .15s ease,border-color .15s ease}
.theme-toggle:hover{background:var(--surface-alt);color:var(--text);border-color:var(--accent)}
.theme-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.theme-toggle .sun,.theme-toggle .moon{line-height:1}
.theme-toggle .sun{display:none}
:root[data-theme="dark"] .theme-toggle .sun{display:inline}
:root[data-theme="dark"] .theme-toggle .moon{display:none}
:root[data-theme="light"] .theme-toggle .sun{display:none}
:root[data-theme="light"] .theme-toggle .moon{display:inline}
@media (prefers-color-scheme: dark){:root:not([data-theme]) .theme-toggle .sun{display:inline}:root:not([data-theme]) .theme-toggle .moon{display:none}}
@media (prefers-color-scheme: light){:root:not([data-theme]) .theme-toggle .moon{display:inline}:root:not([data-theme]) .theme-toggle .sun{display:none}}

/* Hero */
.hero{padding:3rem 0 1.5rem}
.hero-grid{display:grid;grid-template-columns:120px 1fr;gap:1.75rem;align-items:center}
.avatar{width:120px;height:120px;border-radius:50%;object-fit:cover;border:2px solid var(--border);background:var(--surface-alt)}
.hero h1{margin:0 0 .4rem}
.hero .tagline{color:var(--muted);font-size:1.05rem;margin:0}
.hero .lead{margin-top:1.25rem;font-size:1.05rem;color:var(--text)}
.hero .lead p{margin:0 0 .9rem}

/* Pills / tags */
.pills{display:flex;flex-wrap:wrap;gap:.4rem;margin:.75rem 0 0;padding:0;list-style:none}
.pill{font-size:.78rem;padding:.2rem .55rem;border-radius:999px;background:var(--surface-alt);color:var(--muted);border:1px solid var(--border);font-weight:500;letter-spacing:.02em}

/* Section */
section{padding:1.5rem 0}
.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;margin-bottom:1.25rem}
.section-title h2{margin:0}
.section-title .muted{color:var(--muted);font-size:.9rem}

/* Project cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem;margin:0;padding:0;list-style:none}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.1rem 1.15rem;display:flex;flex-direction:column;gap:.6rem;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--accent)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:.75rem}
.card-title{font-size:1.05rem;font-weight:600;margin:0;color:var(--text)}
.card-title a{color:inherit;border:0}
.card-title a:hover{color:var(--accent)}
.lang{font-family:var(--mono);font-size:.72rem;color:var(--muted);background:var(--surface-alt);padding:.15rem .45rem;border-radius:4px;border:1px solid var(--border);white-space:nowrap}
.lang.cpp{color:#9b59b6;border-color:rgba(155,89,182,.3)}
.lang.r{color:#3498db;border-color:rgba(52,152,219,.3)}
.lang.py{color:#3776ab;border-color:rgba(55,118,171,.3)}
.card p{margin:0;color:var(--muted);font-size:.95rem;line-height:1.5;flex:1}
.card-links{display:flex;gap:.9rem;font-size:.85rem;margin-top:.25rem;flex-wrap:wrap}
.card-links a{color:var(--muted);border:0;display:inline-flex;align-items:center;gap:.3rem}
.card-links a:hover{color:var(--accent)}
.card-links .icon{font-size:.95rem}
.card.private{opacity:.85}
.card.private .card-title{color:var(--muted)}
.badge-private{font-size:.7rem;color:var(--muted);background:var(--surface-alt);padding:.1rem .4rem;border-radius:4px;border:1px solid var(--border);text-transform:uppercase;letter-spacing:.05em;white-space:nowrap}

/* Social links */
.social{display:flex;gap:.5rem;margin:1.25rem 0 0;padding:0;list-style:none;flex-wrap:wrap}
.social a{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:8px;color:var(--muted);background:var(--surface-alt);border:1px solid var(--border);font-size:1.05rem;transition:color .15s ease,background .15s ease,border-color .15s ease}
.social a:hover,.social a:focus{color:#fff;background:var(--accent);border-color:var(--accent)}

/* Footer */
.site-footer{margin-top:3rem;padding:1.5rem 0;border-top:1px solid var(--border);color:var(--muted);font-size:.85rem}
.site-footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--accent)}

/* Projects page list */
.project-list{display:flex;flex-direction:column;gap:1rem;list-style:none;padding:0;margin:0}
.project-list .card{padding:1.25rem}

/* 404 */
.notfound{text-align:center;padding:4rem 0}
.notfound h1{font-size:3rem;margin-bottom:.5rem}
.notfound p{color:var(--muted)}

/* Skip link */
.skip{position:absolute;left:-9999px;top:0;padding:.5rem 1rem;background:var(--accent);color:#fff;border-radius:0 0 6px 0;z-index:100}
.skip:focus{left:0}

/* Responsive */
@media (max-width:600px){
  body{font-size:16px}
  .hero{padding:2rem 0 1rem}
  .hero-grid{grid-template-columns:1fr;text-align:center;gap:1.25rem;justify-items:center}
  .avatar{margin:0 auto;width:100px;height:100px}
  .pills{justify-content:center}
  .nav-links{gap:.85rem}
  .nav-links a{font-size:.82rem}
  h1{font-size:1.7rem}
  h2{font-size:1.25rem}
  .cards{grid-template-columns:1fr}
  .site-footer .container{flex-direction:column;text-align:center}
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}