/* Minimal, modern, responsive portfolio */
:root{
  --bg: #0b0c10;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --card: #111827;
  --accent: #6ee7b7;
  --accent-2: #38bdf8;
  --accent-3: #9fbd6f;
  --border: #074edd;
  --nav-hover: rgba(255,255,255,.18);
  --cert-card-bg: color-mix(in srgb, var(--card) 92%, rgba(255,255,255,.08) 8%);
  --cert-card-border: color-mix(in srgb, var(--border) 85%, rgba(255,255,255,.2) 15%);
}
:root.light{
  --bg:#ffffff; --text:#0b0c10; --muted:#4b5563; --card:#f3f4f6; --accent:#0ea5e9; --accent-2:#22c55e; --accent-3: #9fbd6f; --border:#e5e7eb; --nav-hover: rgba(15,23,42,.12); --cert-card-bg:#ffffff; --cert-card-border: rgba(148,163,184,.55);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: var(--bg); color: var(--text);
}

.site-header{
  position:sticky; top:0; backdrop-filter:saturate(180%) blur(8px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  display:flex; align-items:center; justify-content:space-between;
  padding: 12px 20px; border-bottom:1px solid var(--border); z-index:50;
}
.logo{display:flex; align-items:center; text-decoration:none}
.logo-mark{height:36px; width:auto}
.nav{display:flex; align-items:center; gap:6px}
.nav a{color:var(--muted); text-decoration:none; padding:7px 12px; border-radius:10px; transition:background .15s ease, color .15s ease}
.nav a:hover,.nav a:focus-visible{background:var(--nav-hover); color:var(--text)}
.nav button{margin-left:6px; background:transparent; border:1px solid var(--border); border-radius:10px; padding:6px 10px; color:var(--text); cursor:pointer; transition:background .15s ease}
.nav button:hover,.nav button:focus-visible{background:var(--nav-hover)}

.hero{display:grid; grid-template-columns:1.2fr 1fr; gap:28px; padding:72px 20px; max-width:1100px; margin:0 auto}
.hero-art{display:flex; align-items:right; justify-content:right}
.hero-art img{width:100%; max-width:520px; height:auto; border-radius:20px; border:1px solid var(--border)}
.hero-text h1{font-size:clamp(2rem,4vw,3.2rem); margin:0 0 8px}
.subtitle{color:var(--muted); margin-top:0}
.cta{margin-top:18px; display:flex; gap:12px}
.btn{display:inline-block; padding:10px 16px; border:1px solid var(--border); border-radius:12px; text-decoration:none; color:var(--text); transition:transform .06s ease}
.btn:hover{transform:translateY(-1px)}
.btn.secondary{background:linear-gradient(135deg, var(--accent), var(--accent-3)); color:#0b0c10; border:none}
.btn.primary{background:linear-gradient(135deg, var(--accent-3), var(--accent-2)); color:#0b0c10; border:none}

.section{padding:54px 20px; max-width:1100px; margin:0 auto}
.section h2{font-size:1.8rem; margin:0 0 18px}
.page-hero{margin-top:36px; background:color-mix(in srgb, var(--card) 85%, var(--accent-2) 15%); border:1px solid var(--border); border-radius:24px; padding:56px 32px}
.page-hero--accent{background:color-mix(in srgb, var(--card) 80%, var(--accent-2) 20%); border-color:color-mix(in srgb, var(--accent-2) 50%, var(--border) 50%)}
.page-hero h1{margin:0 0 18px; font-size:clamp(2.5rem,5vw,3.5rem)}
.page-hero .section-subtext{max-width:720px; font-size:1.05rem}
.page-hero--publications{background:color-mix(in srgb, var(--card) 80%, var(--accent-2) 20%); border-color:color-mix(in srgb, var(--accent-2) 50%, var(--border) 50%)}
.about{display:grid; grid-template-columns:120px 1fr; gap:18px; align-items:start}
.about .tags{grid-column:2}
.about p{margin:0 0 12px; text-align:justify}
.avatar{width:120px; height:120px; border-radius:16px; border:1px solid var(--border); background:var(--card); padding:8px}
.tags{display:flex; flex-wrap:wrap; gap:8px; list-style:none; padding:0; margin:12px 0 0}
.tags li{border:1px solid var(--border); background:var(--card); padding:6px 10px; border-radius:999px; color:var(--muted)}

.grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
.card{
  background:var(--card); border:1px solid var(--border); border-radius:16px; padding:18px; display:flex; flex-direction:column; gap:10px;
}
.card img{width:100%; border-radius:12px; border:1px solid var(--border)}
.card .title{font-weight:700}
.card .desc{color:var(--muted)}
.card .links{display:flex; gap:10px; margin-top:auto}
.card .links a{color:var(--text); text-decoration:none; border:1px solid var(--border); padding:6px 10px; border-radius:10px}

.pubs{line-height:1.8; display:grid; gap:24px}
.pub-year h3{margin:0 0 8px}
.pub-year ul{list-style:disc; margin:0; padding-left:20px}
.pub-meta{color:var(--muted); display:inline; margin-left:6px}

.section-subtext{color:var(--muted); margin:8px 0 0; font-size:1rem}
.stacked-list{list-style:none; margin:16px 0 0; padding:0; display:grid; gap:12px}
.stacked-list > *{border:1px solid var(--cert-card-border); border-radius:12px; padding:12px 16px; background:var(--cert-card-bg); font-size:1rem; line-height:1.8}

.cert-year{margin-top:28px}
.cert-year:first-of-type{margin-top:18px}
.cert-year h3{margin:0 0 12px; font-size:1.2rem; color:var(--muted)}
.cert-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(200px, 1fr));
  gap:14px;
}
.cert-card{
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  background:var(--cert-card-bg);
  border:1px solid var(--cert-card-border);
  border-radius:14px;
  padding:16px;
  text-decoration:none;
  color:var(--text);
  min-height:160px;
  width:100%;
  transition:transform .08s ease, border-color .08s ease;
}
.cert-card:hover,.cert-card:focus-visible{transform:translateY(-2px); border-color:var(--accent-2)}
.cert-card--no-doc{cursor:default}
.cert-card--no-doc:hover,.cert-card--no-doc:focus-visible{transform:none; border-color:var(--cert-card-border)}
.cert-title{font-weight:600; line-height:1.3; margin-bottom:8px}
.cert-provider{font-size:.9rem; color:var(--muted); line-height:1.4}
.cert-meta{font-size:.85rem; color:var(--accent-3); margin-top:16px; display:block}
.inline-link{color:var(--accent-3); text-decoration:none; font-weight:600}
.inline-link:hover,.inline-link:focus-visible{text-decoration:underline; color:color-mix(in srgb, var(--accent-3) 70%, var(--accent-2) 30%)}

.life-month{margin-top:40px}
.life-month:first-of-type{margin-top:24px}
.life-month h3{margin:0 0 16px; font-size:1.3rem; color:var(--muted)}
.life-grid{display:grid; grid-template-columns:repeat(3, minmax(220px, 1fr)); gap:18px}
.life-card{background:var(--cert-card-bg); border:1px solid var(--cert-card-border); border-radius:16px; overflow:hidden; cursor:pointer; transition:transform .12s ease, border-color .12s ease; min-height:248px; display:flex; flex-direction:column}
.life-card:hover,.life-card:focus-visible{transform:translateY(-4px); border-color:var(--accent-2)}
.life-card img{width:100%; height:160px; object-fit:cover; display:block; flex-shrink:0}
.life-card__meta{padding:12px 14px; display:flex; flex-direction:column; gap:4px; flex-grow:1}
.life-card__title{font-weight:600; color:var(--text)}
.life-card__date{font-size:.9rem; color:var(--muted)}
.life-card__desc{font-size:.9rem; color:var(--muted); margin:6px 0 0; line-height:1.4}
.life-card--empty{background:transparent; border:none; visibility:hidden; pointer-events:none; transition:none; transform:none}
.life-card--empty::before{content:''}
.life-card--empty:hover,.life-card--empty:focus-visible{transform:none; border-color:var(--cert-card-border)}

.lightbox{position:fixed; inset:0; background:rgba(0,0,0,.82); display:none; align-items:center; justify-content:center; z-index:120; padding:24px}
.lightbox.is-open{display:flex}
.lightbox__inner{position:relative; display:flex; align-items:center; justify-content:center; max-width:90vw; max-height:90vh}
.lightbox__inner img{width:auto; height:auto; max-width:90vw; max-height:90vh; border-radius:18px; border:1px solid var(--cert-card-border); background:var(--card); display:block; object-fit:contain}
.lightbox__close{position:absolute; top:-46px; right:0; background:rgba(0,0,0,.65); color:#fff; border:none; border-radius:999px; width:40px; height:40px; font-size:1.5rem; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:background .15s ease}
.lightbox__close:hover,.lightbox__close:focus-visible{background:rgba(0,0,0,.85)}
.lightbox__close span{display:none}
.lightbox__close::after{content:'\00d7'; line-height:1}
body.lightbox-open{overflow:hidden}


.contact{display:grid; grid-template-columns:1fr; gap:8px}
.contact-links{display:flex; flex-wrap:wrap; gap:12px; margin:12px 0 12px; padding:0; list-style:none}
.contact-link{display:flex; flex-direction:column; gap:4px; padding:12px 16px; min-width:200px; border-radius:14px; background:rgba(167, 201, 87, 0.7); border:1px solid color-mix(in srgb, rgba(167, 201, 87, 0.8) 60%, var(--cert-card-border) 40%); text-decoration:none; color:var(--text); transition:transform .12s ease, border-color .12s ease, color .12s ease}
.contact-link:hover,.contact-link:focus-visible{transform:translateY(-3px); border-color:var(--accent-2); color:var(--text)}
.contact-link__label{font-size:.78rem; letter-spacing:.06em; text-transform:uppercase; color:#0b0c10}
.contact-link__value{font-weight:600}
.contact-form{display:grid; gap:10px; max-width:520px; margin-top:12px}
.contact-form input, .contact-form textarea{
  width:100%; padding:10px 12px; border-radius:10px; border:1px solid var(--border); background:var(--card); color:var(--text)
}
.contact-form button{justify-self:start}

.site-footer{border-top:1px solid var(--border); padding:20px; text-align:center; color:var(--muted)}

.accent{background:linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent}

.hint{color:var(--muted); margin-top:8px}

/* Responsive */
@media (max-width: 900px){
  .hero{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr 1fr}
  .page-hero{margin-top:24px; padding:44px 26px}
  .life-grid{grid-template-columns:repeat(2, minmax(200px, 1fr))}
}
@media (max-width: 600px){
  .grid{grid-template-columns:1fr}
  .about{grid-template-columns:1fr}
  .about .tags{grid-column:1}
  .page-hero{padding:36px 20px; border-radius:18px}
  .life-grid{grid-template-columns:1fr}
  .life-card img{height:140px}
}
@media (min-width: 1100px){
  .cert-grid{grid-template-columns:repeat(5, minmax(200px, 1fr));}
}