/* =============== Modern Seattle 2081 theme =============== */
:root{
  /* Color system */
  --bg: #ffffff;
  --bg-elev: #fafafa;
  --ink: #111318;
  --ink-muted: #5b6470;
  --line: #e6e8ec;
  --brand: #0ea5e9;        /* modern cyan (Seattle sky/water nod) */
  --brand-ink: #075985;
  --max: 72rem;

  /* Effects */
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(17,19,24,.06), 0 1px 1px rgba(17,19,24,.04);
  --shadow-md: 0 8px 24px rgba(17,19,24,.10);

  /* Spacing scale */
  --s-1:.25rem; --s-2:.5rem; --s-3:.75rem; --s-4:1rem;
  --s-5:1.5rem; --s-6:2rem; --s-7:3rem;

  /* Type scale */
  --fs-0: .95rem;
  --fs-1: 1rem;
  --fs-2: clamp(1.05rem, 1.2vw, 1.15rem);
  --fs-3: clamp(1.25rem, 2.4vw, 1.6rem);
  --fs-4: clamp(1.6rem, 3.2vw, 2.2rem);
  --fs-5: clamp(2rem, 5vw, 3rem);
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b0d11;
    --bg-elev: #10131a;
    --ink: #f2f5f8;
    --ink-muted: #9aa4b2;
    --line: #1f2530;
    --brand: #38bdf8;
    --brand-ink: #89d9ff;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.4), 0 1px 1px rgba(0,0,0,.35);
    --shadow-md: 0 10px 30px rgba(0,0,0,.5);
  }
}

html,body{height:100%}
*,*:before,*:after{box-sizing:border-box}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:16px/1.65 system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, ui-sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}

/* ---------- Header / Hero ---------- */
.hero{
  position:relative;
  display:grid;
  place-items:center;
  padding: var(--s-7) var(--s-4) var(--s-5);
  background:
    radial-gradient(1200px 500px at 10% 0%, color-mix(in oklab, var(--brand) 25%, transparent), transparent),
    radial-gradient(900px 400px at 100% 0%, color-mix(in oklab, var(--brand) 20%, transparent), transparent),
    linear-gradient(180deg, color-mix(in oklab, var(--brand) 10%, var(--bg)), var(--bg));
  border-bottom: 1px solid var(--line);
}
.hero__art{ display:none } /* not used for modern logo header */

.hero__logo{
  display:block;
  width: clamp(200px, 38vw, 200px);
  height:auto;
  filter: drop-shadow(0 6px 16px rgba(17,19,24,.15));
  margin-bottom: var(--s-4);
}

.hero__text{
  text-align:center;
  max-width: 60ch;
  color: var(--ink);
}
.hero h1{
  margin:.2rem 0 0 0;
  font-size: var(--fs-5);
  letter-spacing:.02em;
  font-weight: 800;
}
.hero .tag{
  margin:.4rem 0 0;
  font-size: var(--fs-2);
  color: var(--ink-muted);
  font-style: italic;
}
.hero .url{
  margin:.4rem 0 0;
  font-weight:600;
  font-size: var(--fs-2);
  color: var(--brand-ink);
}

/* ---------- Layout ---------- */
.wrap{ max-width: var(--max); margin:auto; padding: var(--s-6) var(--s-4) }

h2{
  font-size: var(--fs-3);
  margin: var(--s-6) 0 var(--s-3);
  font-weight: 800;
  letter-spacing: .02em;
}
p, li{ font-size: var(--fs-1); color: var(--ink); max-width: 72ch }
p{ margin:.85rem 0 }

ul.bullets{ padding-left:1rem; margin:.5rem 0 var(--s-4) }
.bullets li{ margin:.25rem 0; color: var(--ink) }

/* Cards / Sections */
.card{
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: var(--s-5);
}
.card + .card{ margin-top: var(--s-4) }

/* FAQ / details */
details{
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .8rem 1rem;
  margin:.8rem 0;
  box-shadow: var(--shadow-sm);
}
summary{
  cursor:pointer; font-weight:700; list-style:none; display:flex; align-items:center; gap:.5rem;
}
summary::-webkit-details-marker{ display:none }
summary::before{
  content:"▸"; transition: transform .18s ease;
}
details[open] summary::before{ transform: rotate(90deg) }

/* Gallery */
.gallery{ margin:1rem 0; display:grid; gap: .75rem }
.gallery img{
  max-width:100%; border:1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.gallery figcaption{ font-size: var(--fs-0); color: var(--ink-muted) }

/* Links + buttons */
a{
  color: var(--brand-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover{ text-decoration-thickness: 2px }

.button, .btn{
  display:inline-block;
  padding:.6rem .9rem;
  border-radius:10px;
  border:1px solid color-mix(in oklab, var(--brand) 35%, var(--line));
  background: linear-gradient(180deg, color-mix(in oklab, var(--brand) 12%, var(--bg-elev)), var(--bg-elev));
  color: var(--brand-ink);
  font-weight:700;
  box-shadow: var(--shadow-sm);
}
.button:hover, .btn:hover{ filter: brightness(1.05) }

/* Footer */
.foot{
  border-top:1px solid var(--line);
  padding: var(--s-5);
  text-align:center;
  color: var(--ink-muted);
  font-size: var(--fs-0);
}

/* Accessibility + motion */
:focus-visible{ outline:2px solid var(--brand); outline-offset:3px }
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; scroll-behavior:auto !important }
}

/* Mobile refinements */
@media (max-width: 520px){
  .hero{ padding: var(--s-6) var(--s-4) var(--s-4) }
  .hero__logo{ width: clamp(200px, 60vw, 420px) }
  .wrap{ padding: var(--s-5) var(--s-4) }
}