/* =========================================================
   Filtrowl — shared design system
   Dark, minimal, one accent. Built for production.
   ========================================================= */

:root{
  /* ink */
  --bg:#060608;
  --bg-2:#0a0a0f;
  --surface:#0f0f15;
  --surface-2:#141420;
  --surface-3:#1a1a28;
  --line:#1f1f2e;
  --line-2:#2a2a3e;
  --line-3:#3a3a52;

  --ink:#f2f3f7;
  --ink-2:#c8cad6;
  --ink-dim:#8a8c9a;
  --ink-mute:#5a5c6a;

  /* single accent — indigo→cyan */
  --accent:#6366f1;
  --accent-2:#22d3ee;
  --accent-grad:linear-gradient(135deg,#6366f1 0%,#8b5cf6 40%,#22d3ee 100%);
  --accent-grad-soft:linear-gradient(135deg,rgba(99,102,241,.18) 0%,rgba(34,211,238,.12) 100%);

  /* semantic */
  --good:#22c55e;
  --warn:#f59e0b;
  --bad:#ef4444;

  /* elevation */
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow:0 10px 40px -10px rgba(0,0,0,.6);
  --shadow-lg:0 30px 80px -20px rgba(0,0,0,.7);
  --glow:0 0 40px -10px rgba(99,102,241,.5);

  /* radii */
  --r-sm:8px;
  --r:12px;
  --r-lg:18px;
  --r-xl:24px;
  --r-2xl:32px;

  /* type */
  --font-sans: "Geist", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Geist Mono", ui-monospace, Menlo, monospace;
  --font-display: "Instrument Serif", "Geist", ui-serif, "Times New Roman", serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.5;
  font-feature-settings:"ss01","cv11";
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font-family:inherit}
img,svg{max-width:100%;display:block}

/* ====== tokens ====== */
.wrap{max-width:1200px;margin:0 auto;padding:0 28px}
@media(max-width:640px){.wrap{padding:0 20px}}

section.block{padding:120px 0;position:relative}
@media(max-width:900px){section.block{padding:88px 0}}
@media(max-width:640px){section.block{padding:72px 0}}

.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink-dim);margin-bottom:20px;
}
.kicker .d{width:6px;height:6px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 10px var(--accent-2)}

h1,h2,h3,h4,h5,h6{font-weight:500;letter-spacing:-.02em;text-wrap:balance;line-height:1.1}
h1{font-size:clamp(40px,6vw,76px);line-height:1}
h2{font-size:clamp(28px,4vw,48px)}
h3{font-size:clamp(22px,2.4vw,30px)}
h4{font-size:18px}
p{text-wrap:pretty}

.grad{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.serif{font-family:var(--font-display);font-style:italic;font-weight:400}

.section-head{text-align:center;max-width:720px;margin:0 auto 72px}
.section-head h2{margin-bottom:16px}
.section-head p{color:var(--ink-dim);font-size:17px;line-height:1.55;max-width:600px;margin:0 auto}

/* ====== buttons ====== */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;border-radius:12px;
  font-size:14.5px;font-weight:500;
  transition:transform .18s,background .18s,border-color .18s,box-shadow .18s;
  white-space:nowrap;
}
.btn .arrow{display:inline-block;transition:transform .2s}
.btn:hover .arrow{transform:translateX(3px)}
.btn-primary{background:var(--accent-grad);color:#fff;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 50px -8px rgba(99,102,241,.7)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line-2)}
.btn-ghost:hover{background:rgba(255,255,255,.03);border-color:var(--line-3)}
.btn-dark{background:var(--surface-2);color:var(--ink);border:1px solid var(--line)}
.btn-dark:hover{background:var(--surface-3);border-color:var(--line-2)}

/* ====== nav ====== */
.topnav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(18px) saturate(1.4);
  -webkit-backdrop-filter:blur(18px) saturate(1.4);
  background:rgba(6,6,8,.72);
  border-bottom:1px solid rgba(255,255,255,.04);
}
.topnav .wrap{display:flex;align-items:center;justify-content:space-between;padding:16px 28px;gap:20px}
@media(max-width:640px){.topnav .wrap{padding:14px 20px}}
.topnav .brand{display:flex;align-items:center;gap:14px;text-decoration:none;flex-shrink:0}
.topnav .brand img{height:32px;width:auto;display:block;filter:drop-shadow(0 0 12px rgba(99,102,241,.35))}
.topnav .brand .mark{width:32px;height:32px;display:block;filter:drop-shadow(0 0 12px rgba(99,102,241,.35));animation:mark-breathe 4s ease-in-out infinite}
.topnav .studio-tag{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink-dim);
  padding:5px 10px;border-radius:6px;
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(99,102,241,.08),rgba(34,211,238,.04));
  line-height:1;
}
@media(max-width:640px){.topnav .studio-tag{display:none}}
@keyframes mark-breathe{0%,100%{filter:drop-shadow(0 0 10px rgba(99,102,241,.3))}50%{filter:drop-shadow(0 0 18px rgba(34,211,238,.45))}}
.topnav .brand-text{display:flex;flex-direction:column;line-height:1;gap:3px}
.topnav .brand-text .n{font-size:14.5px;font-weight:500;letter-spacing:-.01em;color:var(--ink)}
.topnav .brand-text .t{font-size:10.5px;font-family:var(--font-mono);letter-spacing:.15em;color:var(--ink-mute);text-transform:uppercase}
.topnav nav{display:flex;align-items:center;gap:2px}
.topnav nav a{padding:9px 14px;font-size:14px;color:var(--ink-dim);border-radius:8px;transition:color .15s,background .15s}
.topnav nav a:hover,.topnav nav a.active{color:var(--ink);background:rgba(255,255,255,.04)}
.topnav .cta-mini{
  margin-left:6px;padding:10px 18px;border-radius:10px;font-size:13.5px;font-weight:500;
  background:var(--accent-grad);color:#fff;
}
.topnav .cta-mini:hover{background:var(--accent-grad)}
.topnav .burger{display:none;width:38px;height:38px;place-items:center;border-radius:10px;background:var(--surface-2);border:1px solid var(--line)}
.topnav .burger svg{width:18px;height:18px}
@media(max-width:880px){
  .topnav nav{display:none}
  .topnav nav.open{
    display:flex;flex-direction:column;align-items:stretch;gap:4px;
    position:absolute;top:100%;left:0;right:0;padding:16px 20px 20px;
    background:rgba(6,6,8,.95);backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
  }
  .topnav nav.open a{padding:12px 14px;font-size:15px}
  .topnav .burger{display:grid}
}

/* ====== cards ====== */
.card{
  background:linear-gradient(180deg,var(--surface-2),var(--surface));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:28px;
  transition:border-color .2s,transform .2s,box-shadow .2s;
}
.card:hover{border-color:var(--line-2);transform:translateY(-2px);box-shadow:var(--shadow)}

/* ====== chips / tags ====== */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;border-radius:100px;
  background:rgba(255,255,255,.03);border:1px solid var(--line);
  font-size:12px;color:var(--ink-dim);
  font-family:var(--font-mono);letter-spacing:.04em;
}
.chip .d{width:5px;height:5px;border-radius:50%;background:var(--accent-2)}
.chip.good .d{background:var(--good)}
.chip.warn .d{background:var(--warn)}

/* ====== reveal ====== */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.8,.2,1),transform .7s cubic-bezier(.2,.8,.2,1)}
.reveal.on{opacity:1;transform:none}
.reveal.d1{transition-delay:.06s}
.reveal.d2{transition-delay:.12s}
.reveal.d3{transition-delay:.18s}
.reveal.d4{transition-delay:.24s}

/* ====== footer ====== */
.sitefoot{
  border-top:1px solid var(--line);
  padding:72px 0 36px;
  background:var(--bg-2);
}
.sitefoot .wrap{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:56px;align-items:start}
@media(max-width:900px){.sitefoot .wrap{grid-template-columns:1fr 1fr;gap:40px}}
@media(max-width:560px){.sitefoot .wrap{grid-template-columns:1fr}}
.sitefoot .fbrand img{height:42px;width:auto;margin-bottom:20px}
.sitefoot .fbrand .mark{width:42px;height:42px;display:block;margin-bottom:20px}
.sitefoot .fbrand p{color:var(--ink-dim);font-size:14.5px;line-height:1.6;max-width:320px;margin-bottom:24px}
.sitefoot .fbrand .cop{font-size:12px;color:var(--ink-mute);font-family:var(--font-mono);letter-spacing:.04em}
.sitefoot .fcol h5{font-size:12px;font-family:var(--font-mono);letter-spacing:.2em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:18px;font-weight:500}
.sitefoot .fcol a{display:block;padding:6px 0;font-size:14px;color:var(--ink-dim);transition:color .15s}
.sitefoot .fcol a:hover{color:var(--ink)}
.sitefoot .foot-bottom{
  grid-column:1/-1;margin-top:48px;padding-top:28px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
  font-size:12.5px;color:var(--ink-mute);font-family:var(--font-mono);
}
.sitefoot .foot-bottom .links{display:flex;gap:24px}
.sitefoot .foot-bottom .links a:hover{color:var(--ink-2)}

/* ====== utility ====== */
.mono{font-family:var(--font-mono)}
.center{text-align:center}
.fade-bottom{mask-image:linear-gradient(180deg,#000 70%,transparent)}
.gradient-border{position:relative}
.gradient-border::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:var(--accent-grad);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
}