:root{
  --bg:#e9eff2; --card:#f7fafb; --ink:#10242c; --muted:#4a606a; --line:#c4d2d9;
  --accent:#2447e6; --amber:#f0ae14; --on-accent:#fff;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){--bg:#0f1b21;--card:#16262e;--ink:#e6eef1;--muted:#9bb0b9;--line:#2b414b;--accent:#7f9bff;--on-accent:#0f1b21}
}
:root[data-theme="dark"]{--bg:#0f1b21;--card:#16262e;--ink:#e6eef1;--muted:#9bb0b9;--line:#2b414b;--accent:#7f9bff;--on-accent:#0f1b21}
*,*::before,*::after{box-sizing:inherit}
html{scroll-behavior:smooth;scroll-padding-top:calc(env(safe-area-inset-top,0px) + 64px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Instrument Sans",system-ui,sans-serif;line-height:1.65;font-size:17px}
h1,h2,h3{font-family:"Bricolage Grotesque","Segoe UI",sans-serif;line-height:1.1;margin:0}
a{color:var(--accent)}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
.wrap{max-width:1000px;margin:0 auto;padding:0 24px}
section{padding:96px 0 0}
section h2{font-size:clamp(30px,5vw,46px);font-weight:800;margin-bottom:12px}
.lead{color:var(--muted);max-width:60ch;margin:0 0 36px}

nav{position:fixed;top:0;left:0;right:0;z-index:10;padding-top:env(safe-area-inset-top,0px);background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;justify-content:space-between;align-items:center;height:56px}
nav b{font-family:"Bricolage Grotesque",sans-serif}
nav ul{display:flex;gap:20px;list-style:none;margin:0;padding:0;font-size:15px;overflow-x:auto}
nav a{text-decoration:none;color:var(--muted);white-space:nowrap}
nav a:hover{color:var(--ink)}
#theme{background:none;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:4px 10px;cursor:pointer;font:inherit;font-size:14px}

.hero{padding-top:150px}
.hero h1{font-size:clamp(44px,9vw,96px);font-weight:800;letter-spacing:-.03em}
.hero p{font-size:20px;color:var(--muted);max-width:52ch;margin:20px 0 32px}
.cipher{background:var(--ink);color:var(--bg);border-radius:14px;padding:22px 24px;max-width:620px}
.cipher label{display:block;font-size:14px;opacity:.75;margin-bottom:8px}
.cipher input{width:100%;background:transparent;border:0;border-bottom:2px solid var(--amber);color:inherit;font:600 22px "Bricolage Grotesque",sans-serif;padding:6px 0}
.cipher input:focus{outline:none}
.cipher output{display:block;margin-top:14px;font:500 22px ui-monospace,Menlo,Consolas,monospace;color:var(--amber);word-break:break-all;min-height:1.6em}
.cipher small{display:block;margin-top:10px;opacity:.7;font-size:14px;line-height:1.5}
.cipher .shift{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:14px}
.cipher input[type=range]{width:160px;border:0;accent-color:var(--amber)}

.about{display:grid;grid-template-columns:1.4fr 1fr;gap:40px}
.facts{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;margin:0}
.facts dt{font-weight:600}
.facts dd{margin:0 0 14px;color:var(--muted)}
.facts dd:last-child{margin:0}

details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
summary{cursor:pointer;padding:18px 22px;font:700 20px "Bricolage Grotesque",sans-serif;list-style:none;display:flex;justify-content:space-between;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:26px;color:var(--accent);transition:transform .25s}
details[open] summary::after{transform:rotate(45deg)}
.dbody{display:grid;gap:14px;padding:0 22px 22px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.dbody h4{margin:0 0 4px;font-size:15px;color:var(--accent)}
.dbody p{margin:0;font-size:16px}

details.reveal{transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1),translate .25s ease,border-color .25s ease,box-shadow .25s ease}
details:hover{translate:8px 0;border-color:var(--accent);box-shadow:-6px 6px 0 var(--accent)}
details[open]{border-color:var(--accent)}
summary{transition:color .25s ease}
summary:hover{color:var(--accent)}
details[open] .dbody>div{animation:rise .5s cubic-bezier(.2,.7,.2,1) both}
details[open] .dbody>div:nth-child(2){animation-delay:.08s}
details[open] .dbody>div:nth-child(3){animation-delay:.16s}
details[open] .dbody>div:nth-child(4){animation-delay:.24s}
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.about{grid-template-columns:minmax(260px,.85fr) 1.4fr;gap:48px;align-items:start}
.about .side{order:-1;position:sticky;top:84px;background:var(--card);border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:8px 8px 0 var(--line)}
.about .photo{margin:0 0 14px}
.about .photo figcaption{margin-top:14px;font-size:15px;color:var(--muted)}
.about .photo figcaption b{display:block;font:800 24px "Bricolage Grotesque",sans-serif;color:var(--ink);line-height:1.2}
.about .facts{background:none;border:0;border-radius:0;padding:0}
.about .facts dt{font-size:13px;font-weight:500;color:var(--muted);padding-top:12px;border-top:1px solid var(--line)}
.about .facts dd{margin:2px 0 12px;color:var(--ink);font-weight:600;font-size:16px;line-height:1.45}
.about .facts .tags{margin-top:8px;font-weight:500}
.about .facts .tags li{background:var(--bg)}
.dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:#1fa971;margin-right:8px;animation:pulse 2s ease-out infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(31,169,113,.55)}100%{box-shadow:0 0 0 10px rgba(31,169,113,0)}}
@media (max-width:760px){.about .side{position:static;box-shadow:none}}
html,body{overflow-x:clip}
.about{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(220px,1fr);grid-template-areas:"bio photo" "facts photo";gap:8px 56px;align-items:start}
.about .side{display:contents}
.about>div:first-child{grid-area:bio}
.about .photo{grid-area:photo;position:sticky;top:84px;margin:0}
.about .photo figcaption{text-align:left}
.about .facts{grid-area:facts;display:grid;grid-template-columns:130px 1fr;column-gap:20px;margin-top:12px}
.about .facts dt,.about .facts dd{margin:0;padding:14px 0;border-top:1px solid var(--line)}
.about .facts dt{font-size:14px}
.about .facts .tags{margin-top:0}
nav ul{min-width:0;margin:0 12px;gap:16px}
.cipher .shift{flex-wrap:wrap}
.btn{margin-bottom:10px}
@media (max-width:900px){.about{gap:8px 36px}.wrap{padding:0 20px}}
@media (max-width:760px){
  .about{grid-template-areas:"photo" "bio" "facts"}
  .about .photo{position:static;max-width:260px;margin:0 0 24px}
  section{padding-top:72px}
  .contact{padding:32px 22px}
  nav ul{gap:14px;font-size:14px}
  #theme{padding:4px 8px}
  summary{font-size:18px;padding:16px 18px}
  .dbody{padding:0 18px 18px}
}
@media (max-width:520px){
  .about .facts{grid-template-columns:1fr}
  .about .facts dt{padding-bottom:0}
  .about .facts dd{border-top:0;padding-top:2px}
  .hero p{font-size:18px}
  .cipher{padding:18px}
  .cipher input{font-size:18px}
  .cipher output{font-size:18px}
}
details .dbody{transition:opacity .25s ease}
details.closing .dbody{opacity:0}
details[open].closing summary::after{transform:none}
.project.reveal{cursor:pointer;transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1),translate .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s ease,border-color .35s ease}
.project:hover,.project:focus-visible{translate:0 -10px;box-shadow:0 18px 32px rgba(16,36,44,.22);border-color:var(--accent)}
.project:active{translate:0 -4px}
.project::after{content:"View project";display:block;margin-top:16px;font-weight:600;color:var(--accent);text-decoration:underline;text-decoration-color:transparent;text-underline-offset:4px;transition:text-decoration-color .3s ease}
.project:hover::after{text-decoration-color:currentColor}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translate(-50%,24px);background:var(--ink);color:var(--bg);padding:12px 20px;border-radius:12px;border-left:5px solid var(--amber);font-size:15px;max-width:calc(100% - 32px);opacity:0;pointer-events:none;transition:opacity .3s ease,transform .35s cubic-bezier(.2,.7,.2,1);z-index:20}
.toast.show{opacity:1;transform:translate(-50%,0)}
.about .meta{grid-area:facts;display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;margin-top:24px}
.pill{display:inline-flex;align-items:center;border:1px solid var(--line);background:var(--card);border-radius:99px;padding:8px 18px 8px 14px;font-weight:600;font-size:15px}
.pill .dot{margin-right:10px}
.loc{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:15px}
.projects{grid-template-columns:repeat(auto-fit,minmax(min(380px,100%),1fr))}
.certs{grid-template-columns:repeat(auto-fit,minmax(min(210px,100%),1fr))}
.projects{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(380px,100%),1fr));gap:20px}
.project{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;border-top:5px solid var(--accent)}
.project:nth-child(2){border-top-color:var(--amber)}
.project h3{font-size:22px;margin-bottom:8px}
.project p{margin:0 0 14px;color:var(--muted);font-size:16px}
.tags{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:0;list-style:none}
.tags li{font-size:13px;border:1px solid var(--line);border-radius:99px;padding:2px 12px}

.timeline{border-left:3px solid var(--line);margin:0;padding:0 0 0 28px;list-style:none}
.timeline li{position:relative;padding-bottom:30px}
.timeline li::before{content:"";position:absolute;left:-37px;top:7px;width:14px;height:14px;border-radius:50%;background:var(--accent);border:3px solid var(--bg)}
.timeline time{font-weight:600;color:var(--accent)}
.timeline h3{font-size:20px;margin:2px 0 4px}
.timeline p{margin:0;color:var(--muted)}

.photo{margin:0 0 20px}
.photo .ph,.photo img{width:100%;aspect-ratio:1/1;border-radius:18px;object-fit:cover;display:block}
.photo .ph{display:grid;place-items:center;background:var(--card);border:2px dashed var(--line);font:800 64px "Bricolage Grotesque",sans-serif;color:var(--accent)}
.photo figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.certs{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(210px,100%),1fr));gap:20px}
.cert{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}
.cert .frame{aspect-ratio:4/3;border:2px dashed var(--line);border-radius:10px;display:grid;place-items:center;text-align:center;color:var(--muted);font-size:14px;padding:10px;margin-bottom:14px;overflow:hidden}
.cert .frame img{width:100%;height:100%;object-fit:contain}
.cert h3{font-size:19px;margin-bottom:2px}
.cert p{margin:0;color:var(--muted);font-size:15px}
.badge{display:inline-block;margin-top:10px;font-size:13px;font-weight:600;border-radius:99px;padding:2px 12px;background:var(--amber);color:#10242c}
.badge.done{background:var(--accent);color:var(--on-accent)}
.contact{background:var(--ink);color:var(--bg);border-radius:20px;padding:48px 32px;text-align:left}
.contact h2{margin-bottom:12px}
.contact p{max-width:50ch;opacity:.8;margin:0 0 24px}
.btn{display:inline-block;background:var(--amber);color:#10242c;font-weight:600;padding:12px 24px;border-radius:10px;text-decoration:none;margin-right:10px}
.btn.alt{background:transparent;color:var(--bg);border:1px solid currentColor}
footer{padding:40px 0 48px;color:var(--muted);font-size:14px}

/* scroll reveal: content rises from the bottom */
.reveal{opacity:0;transform:translateY(60px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media (max-width:760px){.about{grid-template-columns:1fr}nav b{display:none}.hero{padding-top:120px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{transform:translateY(30px)}}

/* Certificate cards open a viewer */
.cert.reveal{cursor:pointer;transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1),translate .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s ease,border-color .35s ease}
.cert:hover,.cert:focus-visible{translate:0 -8px;box-shadow:0 16px 28px rgba(16,36,44,.2);border-color:var(--accent)}
.cert::after{content:"View certificate";display:block;margin-top:12px;font-weight:600;font-size:15px;color:var(--accent)}
.lightbox{position:fixed;inset:0;z-index:30;display:grid;place-items:center;padding:calc(20px + env(safe-area-inset-top,0px)) 20px calc(20px + env(safe-area-inset-bottom,0px));background:rgba(8,18,22,.74);backdrop-filter:blur(4px);opacity:0;visibility:hidden;transition:opacity .3s ease,visibility 0s linear .3s}
.lightbox.open{opacity:1;visibility:visible;transition:opacity .3s ease}
.lb-panel{position:relative;width:100%;max-width:900px;max-height:100%;overflow:auto;background:var(--card);color:var(--ink);border-radius:18px;padding:18px;transform:translateY(40px) scale(.96);transition:transform .45s cubic-bezier(.2,.7,.2,1)}
.lightbox.open .lb-panel{transform:none}
.lb-close{position:absolute;top:12px;right:12px;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--bg);color:var(--ink);font-size:26px;line-height:1;cursor:pointer;transition:transform .25s ease,border-color .25s ease}
.lb-close:hover{transform:rotate(90deg);border-color:var(--accent)}
.lb-media{margin-top:48px;min-height:200px;display:grid;place-items:center;text-align:center;padding:10px;border-radius:12px;background:var(--bg);color:var(--muted)}
.lb-media img{display:block;max-width:100%;max-height:62vh;object-fit:contain}
.lb-info{padding:16px 4px 4px}
.lb-info h3{font-size:24px}
.lb-info p{margin:4px 0 0;color:var(--muted)}
.lb-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.lb-actions:empty{display:none}
.lb-actions .btn{margin:0;background:var(--accent);color:var(--on-accent)}
.lb-actions .btn.alt{background:transparent;color:var(--ink);border:1px solid var(--line)}
body.lb-lock{overflow:hidden}
.lb-media.is-pdf{padding:0;overflow:hidden}
.lb-media iframe{display:block;width:100%;height:68vh;border:0;background:#fff}
.pdf-badge{font:800 34px "Bricolage Grotesque",sans-serif;color:var(--accent);line-height:1.1}
.pdf-badge small{display:block;font:500 13px "Instrument Sans",sans-serif;color:var(--muted)}