/* Typefaces: drop licensed/OFL font files into assets/fonts and add @font-face here.
   Until then the stacks below fall back to system fonts (no external requests). */
:root{
  --font-display:"Syne","Unbounded","Archivo Black","Arial Black","Segoe UI",system-ui,sans-serif;
  --font-body:"Inter","Segoe UI",system-ui,-apple-system,Roboto,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono",ui-monospace,Menlo,Consolas,"Roboto Mono",monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --ease-io:cubic-bezier(.65,0,.35,1);
  --nav-h:56px;
  --safe-t:env(safe-area-inset-top,0px);
  --safe-b:env(safe-area-inset-bottom,0px);
  --wrap:1120px;
  --r:18px;
}
*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + var(--safe-t) + 28px);-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);font:400 16px/1.65 var(--font-body);overflow-x:hidden;min-height:100vh;-webkit-font-smoothing:antialiased}
body.is-locked{overflow:hidden}
/* technical background: static grid + soft vignette */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(70% 55% at 50% 0%,var(--vignette),transparent 70%),
    linear-gradient(var(--grid) 1px,transparent 1px) 0 0/48px 48px,
    linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/48px 48px;
  -webkit-mask-image:radial-gradient(90% 80% at 50% 30%,#000 30%,transparent 100%);
  mask-image:radial-gradient(90% 80% at 50% 30%,#000 30%,transparent 100%)}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
:focus-visible{outline:2px solid var(--text);outline-offset:3px;border-radius:6px}
.ico{width:1.15em;height:1.15em;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
.mono{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.04em;color:var(--text-2)}
.muted{color:var(--text-2)}.small{font-size:.86rem}
.display{font-family:var(--font-display);font-weight:800;letter-spacing:-.025em;line-height:1.02}
.skip{position:fixed;left:12px;top:-60px;z-index:200;background:var(--accent);color:var(--on-accent);padding:10px 16px;border-radius:10px;font-weight:600;transition:top .25s var(--ease)}
.skip:focus{top:calc(var(--safe-t) + 10px)}

/* ---------- navigation ---------- */
.nav{position:fixed;z-index:80;top:calc(var(--safe-t) + 12px);left:50%;transform:translateX(-50%);
  width:min(calc(100% - 24px),var(--wrap));height:var(--nav-h);padding:0 8px 0 20px;
  display:flex;align-items:center;gap:16px;border-radius:999px;
  background:var(--glass);border:1px solid var(--border);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.nav__brand{font-family:var(--font-mono);font-weight:600;font-size:.95rem;letter-spacing:.12em}
.nav__links{display:none;margin-left:auto;gap:2px}
.nav__links a{position:relative;padding:8px 16px;font-size:.88rem;color:var(--text-2);transition:color .3s}
.nav__links a::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:1px;background:var(--text);transform:scaleX(0);transform-origin:0 50%;transition:transform .5s var(--ease)}
.nav__links a:hover,.nav__links a.is-active{color:var(--text)}
.nav__links a.is-active::after{transform:scaleX(1)}
.nav__tools{margin-left:auto;display:flex;gap:6px;align-items:center}
.icon-btn{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;border:1px solid transparent;color:var(--text-2);font-size:1.1rem;transition:color .3s,background-color .3s,border-color .3s,transform .35s var(--ease)}
.icon-btn:hover{color:var(--text);background:var(--surface-2);border-color:var(--border)}
.icon-btn:active{transform:scale(.9)}
#theme-toggle .ico--sun{display:none}
:root[data-theme="light"] #theme-toggle .ico--sun{display:block}
:root[data-theme="light"] #theme-toggle .ico--moon{display:none}
.menu{position:absolute;top:calc(100% + 8px);left:0;right:0;padding:10px;border-radius:24px;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);display:flex;flex-direction:column}
.menu[hidden]{display:none}
.menu a{padding:14px 16px;border-radius:14px;font-size:1.05rem;font-weight:500;min-height:48px;display:flex;align-items:center}
.menu a:active,.menu a:hover{background:var(--surface-2)}
.menu a.is-active{background:var(--surface-2)}

/* ---------- layout ---------- */
.section{position:relative;max-width:var(--wrap);margin:0 auto;padding:calc(var(--nav-h) + var(--safe-t) + 72px) 20px 72px;min-height:100vh;min-height:100svh}
.label{margin-bottom:18px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 24px;border-radius:14px;font-weight:600;font-size:.93rem;border:1px solid var(--border-strong);transition:transform .45s var(--ease),background-color .3s,color .3s,border-color .3s}
.btn--primary{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.btn--ghost{color:var(--text);background:transparent}
.btn:hover{transform:translateY(-2px)}
.btn--ghost:hover{background:var(--surface-2)}
.btn:active{transform:scale(.97);transition-duration:.15s}
.btn--block{width:100%}
.btn[aria-disabled="true"]{opacity:.55;pointer-events:none}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips li{padding:5px 13px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text-2);font-family:var(--font-mono);font-size:.74rem}

/* ---------- hero ---------- */
.hero{display:grid;align-items:center;gap:32px}
.hero__text{position:relative;z-index:2}
.hero__hey{margin-bottom:14px}
.hero__title{font-size:clamp(2.5rem,9vw,5.2rem);margin-bottom:22px}
.mask{display:block;overflow:hidden;padding-bottom:.08em}
.mask__in{display:block}
.mask--dim .mask__in{color:var(--text-3)}
.hero__role{min-height:1.6em;margin-bottom:12px;color:var(--text)}
#typed{color:var(--text)}
.caret{display:inline-block;width:1px;height:1em;background:var(--text);margin-left:3px;vertical-align:-2px}
.hero__lead{color:var(--text-2);max-width:46ch;margin-bottom:22px}
.hero .chips{margin-bottom:28px}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.scroll-hint{display:inline-block;color:var(--text-3)}

/* ---------- lanyard badge ---------- */
.badge{position:absolute;right:max(4%,12px);top:0;width:min(46vw,250px);height:100%;pointer-events:none;z-index:1}
.badge__strap{position:absolute;left:50%;top:calc(-1 * (var(--nav-h) + var(--safe-t) + 72px));width:34px;margin-left:-17px;height:calc(var(--nav-h) + var(--safe-t) + 72px + 130px);transform-origin:50% 0;will-change:transform}
.badge__band{position:absolute;inset:0 0 18px;background:var(--badge-strap);border:1px solid var(--badge-strap-line);border-bottom:0}
.badge__band::after{content:"KERVIII · KERVIII · KERVIII";position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%) rotate(90deg);white-space:nowrap;font:600 .52rem/1 var(--font-mono);letter-spacing:.3em;color:var(--badge-text)}
.badge__card{position:absolute;left:50%;top:100%;width:min(46vw,214px);aspect-ratio:3/4;margin:-20px 0 0 calc(min(46vw,214px) / -2);padding:10px;border-radius:14px;background:var(--badge-frame);box-shadow:var(--shadow);transform-origin:50% 14px;pointer-events:auto;cursor:grab;touch-action:pan-y;will-change:transform;-webkit-user-select:none;user-select:none}
.badge__card.is-drag{cursor:grabbing}
.badge__card img{width:100%;height:100%;object-fit:cover;object-position:50% 18%;border-radius:8px;filter:var(--photo-filter);-webkit-user-drag:none;pointer-events:none}
.badge__clip{position:absolute;left:50%;top:-6px;width:40px;height:14px;margin-left:-20px;border-radius:4px;background:var(--badge-strap);border:1px solid var(--badge-strap-line);z-index:2}

/* ---------- about ---------- */
.about{display:grid;gap:36px;align-content:center}
.about__title{font-size:clamp(2rem,6.4vw,3.6rem);margin-bottom:20px;max-width:16ch}
.about__lead{color:var(--text-2);max-width:54ch;margin-bottom:22px}
.about .chips{margin-bottom:28px}
.about__cta{display:flex;flex-wrap:wrap;gap:12px}
.about__side{display:grid;gap:18px;align-content:start}
.about__photo{width:min(100%,300px);aspect-ratio:1;border-radius:50%;overflow:hidden;border:1px solid var(--border-strong);justify-self:center}
.about__photo img{width:100%;height:100%;object-fit:cover;object-position:50% 15%;filter:var(--photo-filter)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px}
.stat{padding:16px 18px;border-radius:var(--r);background:var(--surface);border:1px solid var(--border)}
.stat b{display:block;font:800 1.7rem/1.1 var(--font-display)}
.stat span{font-family:var(--font-mono);font-size:.72rem;color:var(--text-2);letter-spacing:.04em}

/* ---------- showcase ---------- */
.showcase__head{text-align:center;margin-bottom:28px}
.showcase__title{font-size:clamp(2rem,6vw,3.3rem);margin-bottom:12px}
.showcase__sub{color:var(--text-2);max-width:48ch;margin:0 auto}
.tabs{position:relative;display:flex;width:min(100%,520px);margin:0 auto 32px;padding:5px;border-radius:999px;background:var(--surface);border:1px solid var(--border)}
.tabs__pill{position:absolute;top:5px;bottom:5px;left:0;width:0;border-radius:999px;background:var(--surface-3);border:1px solid var(--border-strong);transition:transform .55s var(--ease),width .55s var(--ease)}
.tabs__btn{position:relative;flex:1;min-height:44px;padding:0 10px;border-radius:999px;font-size:.88rem;color:var(--text-2);transition:color .3s}
.tabs__btn[aria-selected="true"]{color:var(--text)}
.cards{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr))}
.card{position:relative;display:flex;flex-direction:column;border-radius:var(--r);background:var(--surface);border:1px solid var(--border);overflow:hidden;text-align:left;width:100%;transition:transform .55s var(--ease),border-color .35s,background-color .35s}
.card:hover{transform:translateY(-4px);border-color:var(--border-strong)}
.card:active{transform:scale(.985);transition-duration:.15s}
.cover{position:relative;aspect-ratio:16/9;display:grid;place-items:center;overflow:hidden;background:var(--surface-2);border-bottom:1px solid var(--border);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:22px 22px}
.cover__name{font:800 clamp(1.1rem,4.2vw,1.5rem)/1.05 var(--font-display);letter-spacing:-.02em;text-align:center;padding:0 18px;transition:transform .8s var(--ease)}
.card:hover .cover__name{transform:scale(1.04)}
.cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.cover .tag{position:absolute;top:12px;left:12px}
.tag{padding:3px 10px;border-radius:999px;background:var(--bg);border:1px solid var(--border-strong);font:500 .68rem/1.5 var(--font-mono);color:var(--text-2)}
.tag--live{color:var(--text)}
.card__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:6px;flex:1}
.card__cat{font:500 .72rem/1.4 var(--font-mono);color:var(--text-3)}
.card__title{font:700 1.08rem/1.3 var(--font-body)}
.card__sum{color:var(--text-2);font-size:.9rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__foot{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;color:var(--text-2);font:500 .8rem/1 var(--font-mono)}
.card__go{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:999px;background:var(--surface-3);color:var(--text)}
.card--cert .cover{aspect-ratio:4/3;background:var(--surface-2)}
.card--cert .cover img{object-fit:contain;padding:10px}
.empty{grid-column:1/-1;text-align:center;padding:48px 20px;border:1px dashed var(--border-strong);border-radius:var(--r);color:var(--text-2)}
.tech-group{margin-bottom:28px}
.tech-group h3{font:500 .78rem/1 var(--font-mono);color:var(--text-2);letter-spacing:.06em;margin-bottom:14px}
.tiles{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(110px,1fr))}
.tile{display:flex;flex-direction:column;align-items:center;gap:10px;padding:20px 8px 16px;border-radius:var(--r);background:var(--surface);border:1px solid var(--border);font-size:.84rem;color:var(--text-2);transition:transform .5s var(--ease),border-color .3s,color .3s}
.tile .ico{font-size:1.7rem;color:var(--text)}
.tile:hover{transform:translateY(-4px);border-color:var(--border-strong);color:var(--text)}

/* ---------- project detail ---------- */
.detail{position:fixed;inset:0;z-index:120;background:var(--bg)}
.detail[hidden]{display:none}
.detail__scroll{position:absolute;inset:0;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}
.detail__in{max-width:var(--wrap);margin:0 auto;padding:calc(var(--safe-t) + 20px) 20px calc(var(--safe-b) + 56px)}
.back{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 4px;color:var(--text-2);font:500 .85rem/1 var(--font-mono);transition:color .3s}
.back:hover{color:var(--text)}
.detail__grid{display:grid;gap:24px;margin-top:14px}
.detail__title{font-size:clamp(2rem,7vw,3.4rem);margin-bottom:14px}
.detail__desc{color:var(--text-2);max-width:60ch;margin-bottom:22px}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:22px}
.fact{display:flex;gap:12px;align-items:center;padding:14px 16px;border-radius:14px;background:var(--surface);border:1px solid var(--border)}
.fact .ico{font-size:1.2rem;color:var(--text-2)}
.fact b{display:block;font-size:.95rem;line-height:1.3}
.fact span{font:500 .7rem/1.3 var(--font-mono);color:var(--text-2)}
.detail__actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.detail h3{font:600 .8rem/1 var(--font-mono);letter-spacing:.06em;color:var(--text-2);margin-bottom:12px}
.detail .chips{margin-bottom:24px}
.detail__preview{border-radius:var(--r);border:1px solid var(--border);overflow:hidden;background:var(--surface)}
.detail__preview .cover{aspect-ratio:16/10;border:0}
.detail__preview .cover__name{font-size:clamp(1.6rem,6vw,2.6rem)}
.panel-card{padding:22px;border-radius:var(--r);background:var(--surface);border:1px solid var(--border)}
.feat{display:grid;gap:12px;margin-top:16px}
.feat li{display:flex;gap:10px;color:var(--text-2);font-size:.9rem}
.feat .ico{margin-top:.22em;color:var(--text)}
.note{margin-top:16px;padding:12px 14px;border-radius:12px;border:1px dashed var(--border-strong);color:var(--text-2);font-size:.84rem}
.detail__side{display:grid;gap:18px;align-content:start}

/* ---------- lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:140;background:var(--overlay);display:grid;place-items:center;padding:calc(var(--safe-t) + 64px) 16px calc(var(--safe-b) + 24px);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.lightbox[hidden]{display:none}
.lightbox__close{position:absolute;right:max(14px,env(safe-area-inset-right,0px));top:calc(var(--safe-t) + 14px);background:var(--surface);border-color:var(--border)}
.lightbox__fig{max-width:min(100%,1000px);max-height:100%;display:grid;gap:12px;justify-items:center}
.lightbox__fig img{max-width:100%;max-height:calc(100vh - 160px);max-height:calc(100svh - 160px);object-fit:contain;border-radius:12px;background:#fff}

/* ---------- contact ---------- */
.contact__grid{display:grid;gap:18px;max-width:900px;margin:0 auto}
.form h3,.connect h3{font:700 1.15rem/1.3 var(--font-body);margin-bottom:6px}
.form .small{margin-bottom:18px}
.field{margin-bottom:16px}
.field label{display:block;font:500 .78rem/1 var(--font-mono);color:var(--text-2);margin-bottom:8px}
.field input,.field textarea{width:100%;padding:13px 14px;border-radius:12px;border:1px solid var(--border);background:var(--surface-2);font-size:16px;line-height:1.5;resize:vertical;transition:border-color .3s,background-color .3s}
.field input:hover,.field textarea:hover{border-color:var(--border-strong)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--text-2)}
.field.is-bad input,.field.is-bad textarea{border-color:var(--err)}
.field__err{min-height:0;font-size:.8rem;color:var(--err);margin-top:6px}
.field__err:empty{display:none}
.form__status{margin-top:14px;font-size:.88rem;color:var(--text-2);min-height:1.4em}
.form__status.is-ok{color:var(--ok)}
.links{display:grid;gap:10px;margin-top:16px}
.link-row{display:flex;align-items:center;gap:14px;min-height:56px;padding:10px 14px;border-radius:14px;border:1px solid var(--border);background:var(--surface-2);transition:transform .45s var(--ease),border-color .3s,background-color .3s}
.link-row>.ico:first-child{font-size:1.3rem}
.link-row span{flex:1;min-width:0}
.link-row b{display:block;font-size:.92rem;line-height:1.3}
.link-row small{font:500 .72rem/1.3 var(--font-mono);color:var(--text-2)}
.link-row .ico--go{color:var(--text-3);transition:transform .45s var(--ease),color .3s}
.link-row:hover{border-color:var(--border-strong);transform:translateY(-2px)}
.link-row:hover .ico--go{color:var(--text);transform:translate(2px,-2px)}
.link-row:active{transform:scale(.985)}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--border);padding:28px 20px calc(24px + var(--safe-b));max-width:var(--wrap);margin:0 auto}
.footer__in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px}
.footer__nav{display:flex;flex-wrap:wrap;gap:4px 18px;font-size:.88rem;color:var(--text-2)}
.footer__nav a{padding:8px 0;transition:color .3s}.footer__nav a:hover{color:var(--text)}
.footer__social{display:flex;gap:4px}
.footer__copy{margin-top:18px;color:var(--text-3)}