/* ============= FISIUM BLOG · shared styles ============= */
:root{
  --bg:#fff;--bg-soft:#f6f9fa;--bg-tint:#eaf6f5;--bg-card:#fff;
  --line:#e6ebef;--line-strong:#d1d9df;
  --text:#0d1b22;--text-muted:#56636d;--text-dim:#8893a0;
  --teal:#7ea088;--teal-deep:#3e7649;--teal-soft:#d4e2d6;--teal-tint:#ebf2ec;
  --coral:#ff6b5b;--coral-deep:#e64f3e;
  --r-sm:8px;--r:14px;--r-lg:20px;--r-xl:28px;
  --shadow:0 8px 24px -10px rgba(13,27,34,.10),0 2px 6px -2px rgba(13,27,34,.06);
  --shadow-lg:0 28px 60px -24px rgba(13,27,34,.18),0 6px 16px -8px rgba(13,27,34,.08);
  color-scheme:light;
}
[data-theme="dark"]{
  --bg:#0e1614;--bg-soft:#131c1a;--bg-tint:#1a2522;--bg-card:#18221f;
  --line:#243029;--line-strong:#2f3d35;
  --text:#ecf2ee;--text-muted:#9eafa5;--text-dim:#6b7c73;
  --teal:#95bd9f;--teal-deep:#b8d4be;--teal-soft:#2f4a37;--teal-tint:#1c2a21;
  --coral:#ff8a7c;--coral-deep:#ff6b5b;
  --shadow:0 8px 24px -10px rgba(0,0,0,.55),0 2px 6px -2px rgba(0,0,0,.35);
  --shadow-lg:0 28px 60px -24px rgba(0,0,0,.7),0 6px 16px -8px rgba(0,0,0,.45);
  color-scheme:dark;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme]){
    --bg:#0e1614;--bg-soft:#131c1a;--bg-tint:#1a2522;--bg-card:#18221f;
    --line:#243029;--line-strong:#2f3d35;
    --text:#ecf2ee;--text-muted:#9eafa5;--text-dim:#6b7c73;
    --teal:#95bd9f;--teal-deep:#b8d4be;--teal-soft:#2f4a37;--teal-tint:#1c2a21;
    --coral:#ff8a7c;--coral-deep:#ff6b5b;
    color-scheme:dark;
  }
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;font-size:1.0625rem}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:'Manrope',sans-serif;font-weight:700;letter-spacing:-.025em;line-height:1.15;color:var(--text)}
h1{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:800;letter-spacing:-.035em}
h2{font-size:clamp(1.6rem,3.2vw,2.2rem);margin:48px 0 18px}
h3{font-size:1.35rem;margin:32px 0 14px}
p{color:var(--text-muted);margin-bottom:18px}
.container{max-width:1240px;margin:0 auto;padding:0 24px}
.container-narrow{max-width:780px;margin:0 auto;padding:0 24px}
.nav{position:sticky;top:0;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line);z-index:90;padding:14px 0}
[data-theme="dark"] .nav{background:rgba(14,22,20,.86)}
.nav-row{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:14px;font-family:'Manrope';font-weight:700}
.brand img{height:36px;width:auto}
.brand-meta{display:flex;flex-direction:column;line-height:1.1;border-left:1px solid var(--line);padding-left:14px}
.brand-meta b{font-size:.74rem;color:var(--teal-deep);font-weight:700;text-transform:uppercase;letter-spacing:.04em}
.brand-meta span{font-size:.68rem;color:var(--text-dim);letter-spacing:.1em;margin-top:3px;font-weight:500;text-transform:uppercase}
@media(max-width:520px){.brand-meta{display:none}}
.nav-links{display:none;gap:28px;font-size:.9rem;font-weight:500;color:var(--text-muted)}
.nav-links a:hover{color:var(--teal-deep)}
@media(min-width:880px){.nav-links{display:flex}}
.nav-tools{display:flex;align-items:center;gap:10px}
.theme-toggle{width:40px;height:40px;border-radius:50%;border:1px solid var(--line-strong);background:var(--bg-card);color:var(--text-muted);display:grid;place-items:center;cursor:pointer;transition:all .2s}
.theme-toggle:hover{background:var(--teal-tint);color:var(--teal-deep);border-color:var(--teal-soft)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle .sun{display:none}.theme-toggle .moon{display:block}
[data-theme="dark"] .theme-toggle .sun{display:block}
[data-theme="dark"] .theme-toggle .moon{display:none}
@media (prefers-color-scheme: dark){:root:not([data-theme]) .theme-toggle .sun{display:block}:root:not([data-theme]) .theme-toggle .moon{display:none}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:'Manrope';font-weight:600;font-size:.92rem;padding:12px 22px;border-radius:999px;border:0;cursor:pointer;transition:transform .18s, box-shadow .25s;white-space:nowrap;min-height:44px}
.btn-primary{background:linear-gradient(135deg,var(--teal),var(--teal-deep));color:#fff;box-shadow:0 10px 24px -8px rgba(126,160,136,.5)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{background:var(--bg-card);color:var(--text);border:1px solid var(--line-strong)}
.btn-ghost:hover{background:var(--bg-soft)}
.btn-coral{background:linear-gradient(135deg,var(--coral),var(--coral-deep));color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:10px;padding:7px 14px 7px 10px;border-radius:999px;background:var(--teal-tint);border:1px solid var(--teal-soft);color:var(--teal-deep);font-size:.76rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;font-family:'Manrope'}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--teal)}
footer.foot{border-top:1px solid var(--line);padding:48px 0 32px;background:var(--bg-soft);margin-top:80px}
.foot-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.foot a{color:var(--text-muted);font-size:.9rem}
.foot a:hover{color:var(--teal-deep)}
.foot p{font-size:.82rem;color:var(--text-dim)}
.wa-float{position:fixed;bottom:22px;right:22px;z-index:80;display:flex;align-items:center;gap:10px;padding:14px 22px;border-radius:999px;background:#25d366;color:#fff;font-weight:700;font-family:'Manrope';font-size:.92rem;box-shadow:0 12px 28px -8px rgba(37,211,102,.5);transition:transform .2s}
.wa-float:hover{transform:translateY(-3px)}
.wa-float svg{width:22px;height:22px}
@media(max-width:640px){.wa-float span{display:none}.wa-float{padding:14px}}