/* gavrieleventov.com
   One stylesheet. Tokens first, then base, then components in page order.
   See docs/DESIGN.md for what each token and component is for. */

/* ---------- Fonts (self-hosted, SIL OFL, see assets/fonts) ---------- */
@font-face{font-family:"Saira Semi Condensed";src:url("/assets/fonts/saira-semi-condensed-500.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"Saira Semi Condensed";src:url("/assets/fonts/saira-semi-condensed-600.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"Public Sans";src:url("/assets/fonts/public-sans-var.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}

/* ---------- Tokens ---------- */
:root{
  color-scheme:dark;

  /* Color. Two signal colors carry meaning: amber = EW, cyan = C4I and data. */
  --color-bg:#06162e;            /* saturated deep navy, not grey */
  --color-bg-raised:#0b2142;     /* alternate section surface */
  --color-rule:#1c3a63;          /* decorative dividers only */
  --color-control-border:#5f80aa; /* 4.44:1 on bg, meets WCAG 1.4.11 */
  --color-text:#f4f8fd;          /* 16.95:1 */
  --color-text-muted:#a8bedb;    /* 9.51:1 */
  --color-c4i:#38d6f5;           /* 10.42:1 */
  --color-c4i-hover:#7ee4f9;
  --color-ew:#ffb02e;            /* 9.9:1 */
  --color-on-signal:#06162e;
  --glow-c4i:rgba(56,214,245,.16);
  --glow-ew:rgba(255,176,46,.10);

  /* Type */
  --font-display:"Saira Semi Condensed","Arial Narrow",sans-serif;
  --font-body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --text-sm:.9375rem;
  --text-base:1.0625rem;
  --text-lead:clamp(1.1875rem,1.9vw,1.4375rem);
  --text-h3:1.25rem;
  --text-h2:clamp(1.6rem,2.6vw,2.125rem);
  --text-h1:clamp(2rem,4.2vw,3.25rem);
  --text-mail:clamp(1.5rem,4.2vw,2.75rem);

  /* Space */
  --space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;
  --space-6:32px;--space-7:48px;--space-8:64px;
  --space-section:clamp(64px,9vw,120px);
  --gutter:clamp(16px,5vw,64px);
  --max:1180px;

  /* Shape */
  --radius:6px;
  --rule-width:1px;

  /* Motion */
  --dur-draw:1.6s;
  --ease-draw:cubic-bezier(.6,.1,.3,1);
  --dur-pulse:3.6s;
}

/* ---------- Base ---------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit}
:focus-visible{outline:2px solid var(--color-c4i);outline-offset:3px;border-radius:2px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.skip{position:absolute;left:-999px;top:var(--space-2);background:var(--color-text);color:var(--color-bg);padding:var(--space-2) var(--space-3);z-index:10}
.skip:focus{left:var(--space-2)}

h1,h2,h3{font-family:var(--font-display);font-weight:600}
h1{color:#fff;font-size:var(--text-h1);line-height:1.06;letter-spacing:-.005em;margin:0;max-width:24ch;text-wrap:balance}
h2{font-size:var(--text-h2);line-height:1.15;margin:0 0 var(--space-6)}
h3{font-size:var(--text-h3);line-height:1.25;margin:0 0 6px}
.lead{font-size:var(--text-lead);line-height:1.55;max-width:62ch;margin:0 0 var(--space-8)}

/* ---------- Nav ---------- */
.nav{position:absolute;inset:0 0 auto 0;z-index:3}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{font-family:var(--font-display);font-weight:600;font-size:1.125rem;letter-spacing:.01em;text-decoration:none;padding:var(--space-3) 0}
.brand:hover{color:var(--color-c4i)}
.nav ul{display:flex;gap:var(--space-5);list-style:none;margin:0;padding:0}
.nav ul a{display:inline-block;padding:var(--space-3) var(--space-1);text-decoration:none;color:var(--color-text-muted);font-size:var(--text-sm)}
.nav ul a:hover{color:var(--color-text)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding-top:72px;background:radial-gradient(60% 55% at 52% 38%,var(--glow-c4i),transparent 70%),radial-gradient(28% 30% at 30% 22%,var(--glow-ew),transparent 70%)}
.hero-text{position:relative;margin-top:-28px;padding-bottom:clamp(56px,8vw,112px)}
.who{margin:0 0 20px;color:var(--color-text-muted);font-size:1rem}
.who strong{color:var(--color-text);font-weight:600}
.sub{margin:22px 0 0;max-width:56ch;font-size:clamp(1.0625rem,1.5vw,1.25rem);color:var(--color-text-muted);line-height:1.5}
.actions{display:flex;flex-wrap:wrap;gap:var(--space-3);margin-top:var(--space-6)}

/* Button: primary (one per view) and ghost (secondary) */
.btn{display:inline-block;padding:var(--space-3) 20px;min-height:44px;border-radius:var(--radius);text-decoration:none;font-weight:600;font-size:var(--text-sm);line-height:1.3;border:var(--rule-width) solid var(--color-rule)}
.btn-icon{display:inline-flex;align-items:center;gap:var(--space-2)}
.icon{display:block;flex:none}
.icon-link{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;margin:-8px 0}
.icon-link:hover .icon{opacity:.8}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.btn-primary{background:var(--color-c4i);color:var(--color-on-signal);border-color:var(--color-c4i)}
.btn-primary:hover{background:var(--color-c4i-hover);border-color:var(--color-c4i-hover)}
.btn-ghost{border-color:var(--color-control-border)}
.btn-ghost:hover{border-color:var(--color-text-muted)}

/* ---------- Hero scene (the one animated element) ---------- */
.scene{display:block;width:100%;height:auto;max-height:52vh;min-height:260px}
.scene{-webkit-mask-image:linear-gradient(to right,transparent,#000 10%,#000 90%,transparent),linear-gradient(to bottom,#000 72%,transparent);-webkit-mask-composite:source-in;mask-image:linear-gradient(to right,transparent,#000 10%,#000 90%,transparent),linear-gradient(to bottom,#000 72%,transparent);mask-composite:intersect}
.scene .plat{fill:none;stroke:var(--color-text);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.scene .terrain{fill:none;stroke:#2f5a8c;stroke-width:1.6}
.scene .wave{fill:none;stroke:#2f5a8c;stroke-width:1.4}
.scene .ring{fill:none;stroke:#24497a;stroke-width:1;stroke-dasharray:2 6}
.scene .link{fill:none;stroke:var(--color-c4i);stroke-width:1.6;stroke-dasharray:5 7;opacity:.85}
.scene .pkt{fill:#fff;filter:drop-shadow(0 0 4px var(--color-c4i))}
.scene .emit{fill:none;stroke:var(--color-ew);stroke-width:1.8}
.scene .tag{fill:var(--color-text-muted);font:500 15px var(--font-body)}

/* Load sequence: platforms draw, then links appear, then labels and emissions */
.scene .draw{stroke-dasharray:1;stroke-dashoffset:1;animation:draw var(--dur-draw) var(--ease-draw) forwards}
.scene .d2{animation-delay:.25s}.scene .d3{animation-delay:.5s}.scene .d4{animation-delay:.75s}.scene .d5{animation-delay:1s}
.scene .links{opacity:0;animation:fade 1.2s 1.7s forwards}
.scene .tags{opacity:0;animation:fade 1s 2.2s forwards}
.scene .emitters{opacity:0;animation:fade .8s 2.4s forwards}
.scene .pulse{transform-box:fill-box;transform-origin:center;animation:pulse var(--dur-pulse) ease-out infinite;opacity:0}
.scene .e1{animation-delay:0s}.scene .e2{animation-delay:1.2s}.scene .e3{animation-delay:2.4s}
.scene .e4{animation-delay:.6s}.scene .e5{animation-delay:1.8s}.scene .e6{animation-delay:1.4s}.scene .e7{animation-delay:3s}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes fade{to{opacity:1}}
@keyframes pulse{0%{transform:scale(.15);opacity:.85}100%{transform:scale(1);opacity:0}}

/* ---------- Sections ---------- */
section{padding:var(--space-section) 0;border-top:var(--rule-width) solid var(--color-rule)}

/* Core areas: three groups, color-coded by domain */
.areas{display:grid;grid-template-columns:repeat(3,1fr);gap:40px var(--space-7)}
.area-group h3{display:flex;align-items:center;gap:10px;margin-bottom:var(--space-4)}
.area-group h3::before{content:"";width:22px;height:2px;background:currentColor;flex:none}
.g-ew h3{color:var(--color-ew)}
.g-c4i h3{color:var(--color-c4i)}
.g-both h3{color:var(--color-text)}
.area-group ul{list-style:none;margin:0;padding:0}
.area-group li{padding:var(--space-3) 0;border-top:var(--rule-width) solid var(--color-rule)}
.area-group li b{display:block;font-weight:600}
.area-group li span{color:var(--color-text-muted);font-size:var(--text-sm);line-height:1.5}

/* Experience: capability first, evidence underneath. Color marks the domain. */
.experience{background:var(--color-bg-raised);border-top-color:transparent}
.exp-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-7) 56px}
.exp{border-left:3px solid var(--exp-color,var(--color-text));padding-left:var(--space-5)}
.x-ew{--exp-color:var(--color-ew)}
.x-c4i{--exp-color:var(--color-c4i)}
.x-both{--exp-color:var(--color-text)}
.exp h3{font-size:1.375rem;margin-bottom:var(--space-2)}
.exp p{margin:0;max-width:60ch}
.exp .exp-proof{margin-top:var(--space-3);color:var(--color-text-muted);font-size:var(--text-sm);line-height:1.55}

.below{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-7);margin-top:88px;padding-top:56px;border-top:var(--rule-width) solid var(--color-rule)}
.plain{list-style:none;margin:var(--space-4) 0 0;padding:0}
.plain li{padding:10px 0;border-top:var(--rule-width) solid var(--color-rule);max-width:60ch}
.plain li:first-child{border-top:0;padding-top:0}
.plain li span{display:block;color:var(--color-text-muted);font-size:var(--text-sm)}

/* Selected work (reserved; enable in index.html) */
.work-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:40px}
.work-item p{color:var(--color-text-muted);margin:0}

/* Contact */
.contact h2{margin-bottom:var(--space-4)}
.contact .lead{margin-bottom:36px}
.mail{display:inline-block;padding-bottom:2px;font-family:var(--font-display);font-weight:600;font-size:var(--text-mail);text-decoration:none;border-bottom:2px solid var(--color-c4i);overflow-wrap:anywhere}
.mail:hover{color:var(--color-c4i)}
.contact-meta{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-3) 40px;margin-top:36px;color:var(--color-text-muted)}
.contact-meta a{color:var(--color-text);text-underline-offset:4px;display:inline-block;padding:var(--space-3) 0}
.contact-meta span{padding:var(--space-3) 0}

footer{border-top:var(--rule-width) solid var(--color-rule);padding:28px 0;color:var(--color-text-muted);font-size:.875rem}

/* 404 */
.notfound{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding-top:var(--space-8);padding-bottom:var(--space-8)}
.notfound p{color:var(--color-text-muted);margin:var(--space-4) 0 0}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .areas{grid-template-columns:1fr 1fr}
  .g-both{grid-column:1 / -1}
  .below{grid-template-columns:1fr}
  .exp-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .nav ul{gap:var(--space-4)}
  .nav .hide-sm{display:none}
  .scene{min-height:0}
  .hero-text{margin-top:var(--space-2)}
  .scene .tags{display:none}
  .scene .plat{stroke-width:3.4}
  .scene .link{stroke-width:2.6;opacity:.7}
  .scene .pkt{r:6px}
  .scene .emit{stroke-width:2.6}
  .scene .terrain,.scene .wave{stroke-width:2.4}
  .areas{grid-template-columns:1fr}
}

/* ---------- Reduced motion: show the finished picture, no movement ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .scene .draw{animation:none;stroke-dashoffset:0}
  .scene .links,.scene .tags,.scene .emitters{animation:none;opacity:1}
  .scene .pulse{animation:none;opacity:.35;transform:scale(.6)}
  .scene .pkt{display:none}
}