/* ==========================================================================
   SKANGEN.AI — shell: design tokens, header, mobile menu, footer.
   Loaded by EVERY page, including the real-estate portfolio, which does not
   load site.css. Rules are scoped (.nav …, .footer …) so they stay intact on
   pages that bring their own .btn / .wrap / .brand styles.
   ========================================================================== */

/* ---------- Tokens ---------- */
:root{
  --ink:#0a0b0f; --ink-2:#111318; --ink-3:#171a21;
  --paper:#f4f2ec; --paper-2:#eae7dd; --white:#ffffff;
  --lime:#d7ff63; --lime-deep:#b5de3a; --violet:#7467ff; --violet-soft:#a79dff; --cyan:#74e7f7;

  --f-display:"Inter Tight","Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-serif:"Instrument Serif",Georgia,"Times New Roman",serif;
  --f-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --fs-hero:clamp(2.9rem,7.4vw,6.6rem);
  --fs-h2:clamp(2.1rem,4.8vw,4rem);
  --fs-h3:clamp(1.3rem,2.1vw,1.85rem);
  --fs-lead:clamp(1.05rem,1.35vw,1.25rem);
  --fs-body:1rem; --fs-small:.875rem; --fs-label:.72rem;

  --wrap:1260px;
  --gutter:clamp(1rem,4vw,2.5rem);
  --sec-y:clamp(5rem,10vw,9rem);
  --nav-h:76px;

  --r-sm:10px; --r-md:18px; --r-lg:28px; --r-xl:36px; --r-pill:999px;
  --shadow-1:0 10px 30px rgba(10,11,15,.08);
  --shadow-2:0 30px 80px rgba(10,11,15,.18);
  --shadow-glow:0 0 60px rgba(116,103,255,.25);

  --ease:cubic-bezier(.22,1,.36,1);
  --ease-io:cubic-bezier(.65,0,.35,1);
  --dur-1:.22s; --dur-2:.6s; --dur-3:1.1s;
}
.s-dark{
  --bg:var(--ink); --fg:#f5f5f0; --muted:#9ea3ae; --muted-2:#8b909b;
  --line:rgba(255,255,255,.1); --line-strong:rgba(255,255,255,.2);
  --surface:#14161c; --surface-2:#1b1e26; --accent:var(--lime); --accent-2:var(--violet-soft);
  color-scheme:dark;
}
.s-light{
  --bg:var(--paper); --fg:#0f1115; --muted:#5b606b; --muted-2:#686d77;
  --line:rgba(10,11,15,.12); --line-strong:rgba(10,11,15,.28);
  --surface:#ffffff; --surface-2:var(--paper-2); --accent:var(--violet); --accent-2:var(--violet);
  color-scheme:light;
}
.s-dark,.s-light{ background:var(--bg); color:var(--fg); }

/* ---------- Self-contained resets for shell elements ---------- */
.nav,.nav *,.mobile-menu,.mobile-menu *,.footer,.footer *,.skip{ box-sizing:border-box; }
.nav a,.mobile-menu a,.footer a{ color:inherit; text-decoration:none; }
.mobile-menu ul,.footer ul{ list-style:none; margin:0; padding:0; }
.footer :is(h2,h4),.footer p{ margin:0; }
.nav .wrap,.footer .wrap{ width:min(var(--wrap),100% - 2*var(--gutter)); margin-inline:auto; }

.skip{ position:absolute; left:1rem; top:-100px; z-index:1000; background:var(--lime); color:var(--ink); padding:.7rem 1rem; border-radius:var(--r-sm); font-weight:600; font-family:var(--f-body); }
.skip:focus{ top:1rem; }

/* ---------- Brand ---------- */
.brand{ display:inline-flex; align-items:center; gap:.7rem; font-family:var(--f-display); font-weight:700; font-size:1.15rem; letter-spacing:-.05em; line-height:1; color:#f5f5f0; white-space:nowrap; }
.brand svg{ display:block; width:34px; height:34px; border-radius:9px; flex:none; transition:transform var(--dur-2) var(--ease); }
.brand:hover svg{ transform:rotate(-8deg) scale(1.04); }

/* ---------- Header ---------- */
.nav{
  position:fixed; inset-inline:0; top:0; z-index:100; height:var(--nav-h);
  color:#f5f5f0; font-family:var(--f-body);
  transition:background var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease), backdrop-filter var(--dur-2) var(--ease);
  border-bottom:1px solid transparent;
}
.nav.is-scrolled{ background:rgba(10,11,15,.78); backdrop-filter:blur(18px) saturate(140%); -webkit-backdrop-filter:blur(18px) saturate(140%); border-color:rgba(255,255,255,.08); }
.nav .wrap{ display:flex; align-items:center; justify-content:space-between; height:100%; gap:1.5rem; }
.nav .nav-links{ display:flex; gap:clamp(1rem,2vw,2rem); margin:0; }
.nav .nav-links a{ font-size:.92rem; font-weight:500; color:#c9ccd4; padding:.35rem 0; position:relative; transition:color var(--dur-1); }
.nav .nav-links a::after{ content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px; background:var(--lime); transform:scaleX(0); transform-origin:right; transition:transform var(--dur-2) var(--ease); border-radius:2px; }
.nav .nav-links a:hover,.nav .nav-links a[aria-current="page"]{ color:#fff; }
.nav .nav-links a:hover::after,.nav .nav-links a[aria-current="page"]::after{ transform:scaleX(1); transform-origin:left; }
.nav .nav-right{ display:flex; align-items:center; gap:1rem; }
.nav :focus-visible,.mobile-menu :focus-visible,.footer :focus-visible{ outline:2px solid var(--lime); outline-offset:4px; border-radius:4px; }

/* Header button: fully defined here so page-level .btn rules can't restyle it. */
.nav .btn{
  display:inline-flex; align-items:center; gap:.65em; padding:.7em 1.2em; min-height:42px;
  border-radius:var(--r-pill); border:1px solid transparent; background:var(--lime); color:var(--ink);
  font-family:var(--f-display); font-weight:600; font-size:.88rem; letter-spacing:-.01em; line-height:1.2; white-space:nowrap;
  position:relative; overflow:hidden; isolation:isolate; box-shadow:none; margin:0;
  transition:transform var(--dur-1) var(--ease), box-shadow var(--dur-1) var(--ease);
}
.nav .btn::after{ content:""; position:absolute; inset:0; z-index:-1; border-radius:inherit; background:rgba(255,255,255,.35); transform:translateY(101%); transition:transform var(--dur-2) var(--ease); }
.nav .btn:hover{ transform:translateY(-2px); box-shadow:0 14px 30px rgba(215,255,99,.25); }
.nav .btn:hover::after{ transform:translateY(0); }
.nav .btn .arr{ display:inline-block; transition:transform var(--dur-1) var(--ease); }
.nav .btn:hover .arr{ transform:translateX(4px); }

/* ---------- Menu button + mobile menu ---------- */
.menu-btn{ display:none; width:44px; height:44px; border-radius:50%; border:1px solid rgba(255,255,255,.18); background:none; color:#fff; cursor:pointer; place-items:center; position:relative; padding:0; }
.menu-btn span{ position:absolute; left:12px; right:12px; height:2px; background:#fff; border-radius:2px; transition:transform var(--dur-2) var(--ease); }
.menu-btn span:nth-child(1){ transform:translateY(-5px); }
.menu-btn span:nth-child(2){ transform:translateY(5px); }
.menu-btn[aria-expanded="true"] span:nth-child(1){ transform:rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2){ transform:rotate(-45deg); }

.mobile-menu{
  position:fixed; inset:0; z-index:95; background:var(--ink); color:#fff; font-family:var(--f-body);
  padding:calc(var(--nav-h) + 2rem) var(--gutter) 2rem;
  display:flex; flex-direction:column; justify-content:space-between;
  clip-path:inset(0 0 100% 0); transition:clip-path var(--dur-3) var(--ease); visibility:hidden;
}
.mobile-menu.is-open{ clip-path:inset(0 0 0 0); visibility:visible; }
.mobile-menu ul{ display:grid; gap:.25rem; }
.mobile-menu li{ overflow:hidden; border-bottom:1px solid rgba(255,255,255,.08); }
.mobile-menu li a{ display:flex; justify-content:space-between; align-items:center; font-family:var(--f-display); font-size:clamp(1.8rem,8vw,2.6rem); font-weight:600; letter-spacing:-.04em; padding:.6rem 0; transform:translateY(110%); transition:transform var(--dur-2) var(--ease); transition-delay:calc(var(--i,0)*.05s); }
.mobile-menu.is-open li a{ transform:none; }
.mobile-menu li a .arr{ font-size:1.4rem; color:var(--lime); }
.mobile-menu .mm-foot{ display:grid; gap:1rem; font-size:.95rem; color:#9ea3ae; }
.mobile-menu .mm-foot a{ font-size:1rem; font-weight:500; }
body.menu-open{ overflow:hidden; }

/* ---------- Footer ---------- */
.footer{ border-top:1px solid var(--line); padding:clamp(3rem,6vw,5rem) 0 2rem; font-family:var(--f-body); line-height:1.65; }
.foot-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:2.5rem; padding-bottom:3rem; }
.foot-grid :is(h2,h4){ font-family:var(--f-mono); font-size:.66rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); margin-bottom:1rem; font-weight:500; }
.foot-grid li{ margin-bottom:.6rem; }
.foot-grid a{ color:#c9ccd4; font-size:.95rem; transition:color var(--dur-1); }
.foot-grid a:hover{ color:var(--lime); }
.foot-brand p{ color:var(--muted); margin-top:1rem; max-width:34ch; line-height:1.6; }
.foot-brand .brand{ font-size:1.25rem; }
.foot-bottom{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:.75rem 2rem; padding-top:1.5rem; border-top:1px solid var(--line); font-size:.82rem; color:var(--muted); }
.foot-bottom a:hover{ color:#fff; }

/* ---------- Responsive ---------- */
@media (max-width:1100px){
  .nav .btn{ display:none; }
  .foot-grid{ grid-template-columns:1fr 1fr 1fr; }
  .foot-brand{ grid-column:span 3; }
}
@media (max-width:900px){
  :root{ --nav-h:68px; }
  .nav .nav-links{ display:none; }
  .menu-btn{ display:grid; }
}
@media (max-width:640px){
  .foot-grid{ grid-template-columns:1fr 1fr; }
  .foot-brand{ grid-column:span 2; }
}
@media (prefers-reduced-motion: reduce){
  .nav,.nav *,.mobile-menu,.mobile-menu *{ transition-duration:.001ms!important; }
}