/* Danil Kutny — personal site. Hand-written, no framework.
   Glassmorphism theme, light default + dark toggle. */

/* ---------- THEME TOKENS ---------- */
:root{                       /* LIGHT (default) */
  --bg-1:#eef1fb;
  --bg-2:#e4e8f4;
  --glow-1:rgba(110,140,255,.35);
  --glow-2:rgba(80,210,200,.22);
  --text:#232a3b;
  --muted:#697089;
  --accent:#5b6ef5;
  --accent-2:#25c5b6;
  --accent-ink:#ffffff;
  --glass:rgba(255,255,255,.55);
  --glass-strong:rgba(255,255,255,.72);
  --glass-brd:rgba(255,255,255,.85);
  --card-shadow:0 14px 40px rgba(40,54,110,.12);
  --pill:rgba(255,255,255,.6);
  --nav-bg:rgba(245,247,253,.7);
  --line:rgba(40,54,110,.10);
}
:root[data-theme="dark"]{    /* DARK */
  --bg-1:#252b3c;
  --bg-2:#171b28;
  --glow-1:rgba(110,140,255,.30);
  --glow-2:rgba(60,200,190,.14);
  --text:#eaedf7;
  --muted:#9aa3bd;
  --accent:#7c9cff;
  --accent-2:#37d6c6;
  --accent-ink:#0e1220;
  --glass:rgba(255,255,255,.06);
  --glass-strong:rgba(255,255,255,.09);
  --glass-brd:rgba(255,255,255,.12);
  --card-shadow:0 16px 44px rgba(0,0,0,.45);
  --pill:rgba(255,255,255,.07);
  --nav-bg:rgba(23,27,40,.62);
  --line:rgba(255,255,255,.10);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--text);
  font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  background:
    radial-gradient(70% 55% at 15% -5%,var(--glow-1),transparent 60%),
    radial-gradient(60% 50% at 100% 0%,var(--glow-2),transparent 55%),
    linear-gradient(160deg,var(--bg-1),var(--bg-2));
  background-attachment:fixed;min-height:100vh;
  transition:background .4s ease,color .3s ease;
}
a{color:inherit}
img{max-width:100%;display:block}

/* ---------- GLASS PRIMITIVE ---------- */
.card,.tile,.chip,.nav,.toggle{
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  backdrop-filter:blur(18px) saturate(160%);
}

/* ---------- NAV ---------- */
.nav{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.7rem clamp(1rem,4vw,2rem);
  background:var(--nav-bg);border-bottom:1px solid var(--line);
}
.nav__name{font-weight:700;letter-spacing:.02em;text-decoration:none}
.nav__right{display:flex;align-items:center;gap:clamp(.5rem,2vw,1.2rem)}
.nav__links{display:flex;gap:clamp(.5rem,2.2vw,1.4rem);flex-wrap:wrap}
.nav__links a{color:var(--muted);text-decoration:none;font-size:.92rem;transition:color .15s}
.nav__links a:hover{color:var(--accent)}

/* theme toggle */
.toggle{
  width:40px;height:40px;flex:0 0 auto;display:grid;place-items:center;cursor:pointer;
  border-radius:50%;border:1px solid var(--glass-brd);background:var(--glass);
  color:var(--text);box-shadow:var(--card-shadow);transition:transform .15s,background .2s;
}
.toggle:hover{transform:translateY(-1px) rotate(-8deg)}
.toggle svg{width:19px;height:19px}
.toggle .i-sun{display:none}
.toggle .i-moon{display:block}
:root[data-theme="dark"] .toggle .i-sun{display:block}
:root[data-theme="dark"] .toggle .i-moon{display:none}

/* ---------- LAYOUT ---------- */
main{max-width:920px;margin:0 auto;padding:0 clamp(1rem,4vw,2rem)}
.section{padding:clamp(2.4rem,6vw,4.2rem) 0}
.section__title{font-size:clamp(1.4rem,3vw,2rem);margin:0 0 1.6rem;letter-spacing:-.01em}
.section__title::after{
  content:"";display:block;width:46px;height:4px;margin-top:.6rem;border-radius:4px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
}

/* ---------- HERO ---------- */
.hero{
  display:grid;grid-template-columns:1.4fr .9fr;gap:clamp(1.5rem,5vw,3rem);
  align-items:center;padding:clamp(2.4rem,7vw,4.5rem) 0 clamp(1.8rem,5vw,3rem);
}
.eyebrow{color:var(--accent);font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  font-size:.76rem;margin:0 0 .5rem}
.hero h1{font-size:clamp(2.4rem,7vw,3.7rem);line-height:1.04;margin:0 0 1rem;letter-spacing:-.025em}
.lead{font-size:1.12rem}
.quote{margin:1.6rem 0;padding:.4rem 0 .4rem 1.1rem;border-left:3px solid var(--accent);
  color:var(--muted);font-style:italic}
.quote cite{display:block;font-style:normal;font-size:.9rem;margin-top:.3rem}
.hero__portrait{position:relative}
.hero__portrait img{
  border-radius:26px;width:100%;
  border:1px solid var(--glass-brd);box-shadow:var(--card-shadow);
}
.hero__portrait::after{           /* soft glow pedestal */
  content:"";position:absolute;inset:auto 8% -14px;height:40px;border-radius:50%;
  background:radial-gradient(closest-side,var(--glow-1),transparent);filter:blur(6px);z-index:-1;
}
.note{color:var(--muted);font-size:.9rem;margin-top:1rem}

/* ---------- CHIPS ---------- */
.chips{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1.3rem}
.chip{
  display:inline-block;padding:.5rem .95rem;border-radius:999px;text-decoration:none;
  background:var(--pill);border:1px solid var(--glass-brd);color:var(--text);
  font-size:.9rem;transition:transform .15s,box-shadow .2s,border-color .2s;
}
.chip:hover{transform:translateY(-2px);box-shadow:var(--card-shadow);border-color:var(--accent)}
.chip--static:hover{transform:none;box-shadow:none;border-color:var(--glass-brd)}

/* ---------- CARDS ---------- */
.stack{display:flex;flex-direction:column;gap:1.2rem}
.card{
  background:var(--glass);border:1px solid var(--glass-brd);border-radius:22px;
  padding:clamp(1.3rem,3vw,1.9rem);box-shadow:var(--card-shadow);
  transition:transform .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-3px)}
.card h3{margin:0 0 .6rem;font-size:1.28rem;letter-spacing:-.01em}
.card p{margin:0 0 1rem;color:var(--muted)}
.card p:last-child{margin-bottom:0}
.tag{font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;vertical-align:middle;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#fff;
  padding:.22rem .55rem;border-radius:7px;margin-left:.45rem}
.link{color:var(--accent);text-decoration:none;font-weight:700;font-size:.95rem;
  display:inline-block;transition:opacity .15s,transform .15s}
.link:hover{opacity:.8;transform:translateX(2px)}

/* ---------- GRIDS / TILES ---------- */
.grid{display:grid;gap:1.2rem}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.tile{
  background:var(--glass);border:1px solid var(--glass-brd);border-radius:22px;
  overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--card-shadow);
  transition:transform .2s ease}
.tile:hover{transform:translateY(-3px)}
.tile img{aspect-ratio:16/10;object-fit:cover;width:100%}
.tile h3{margin:0;padding:1rem 1.15rem .4rem;font-size:1.1rem}
.tile p{margin:0;padding:0 1.15rem .9rem;color:var(--muted);font-size:.94rem}
.tile .link{margin:0 1.15rem 1.15rem}

.card--media .card__logo img{height:48px;width:auto;margin-bottom:.9rem}
.card--media .card__shot img{border-radius:14px;border:1px solid var(--glass-brd);margin-bottom:1rem}

/* ---------- PAPER / BUTTON ---------- */
.paper h3{font-size:1.32rem;line-height:1.35}
.btn{
  display:inline-block;margin-top:.4rem;padding:.75rem 1.4rem;border-radius:14px;
  background:linear-gradient(120deg,var(--accent),var(--accent-2));color:#fff;
  font-weight:700;text-decoration:none;box-shadow:0 10px 26px rgba(91,110,245,.35);
  transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(91,110,245,.45)}

/* ---------- CONTACT / FOOTER ---------- */
.contact .lead{max-width:640px}
.foot{max-width:920px;margin:0 auto;padding:2rem clamp(1rem,4vw,2rem) 3rem;
  color:var(--muted);font-size:.88rem;border-top:1px solid var(--line)}

/* ---------- RESPONSIVE ---------- */
@media (max-width:760px){
  .hero{grid-template-columns:1fr}
  .hero__portrait{order:-1;max-width:260px}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .nav__links{display:none}          /* keep the bar clean on phones */
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}