/* === Seju Mosaic — Core Styles === */
/* Neutral, airy palette + refined motion system */
/* Author: Generated by ChatGPT — drop-in ready CSS */

/* CSS Variables */
:root{
  --bg: #EEEAE7;
  --bg-2:#F3F0ED;
  --text:#161615;
  --muted:#6A625D;
  --accent:#A79C97;
  --accent-2:#8D837D;
  --maxw: 1040px;
  --radius: 18px;
  --shadow: 0 8px 22px rgba(0,0,0,.07);
  --ease: cubic-bezier(.22,.61,.36,1);
  --dur: 280ms;
}

/* Reset-ish */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-serif, Georgia, 'Times New Roman', Times, serif;
  color:var(--text);
  background:
    radial-gradient(1200px 800px at 10% -10%, #FFFFFF 0%, transparent 60%),
    radial-gradient(1400px 800px at 120% 10%, #FAF7F4 0%, transparent 60%),
    var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
a:hover{color:var(--text)}
button, a, input, textarea{font:inherit}

/* Layout Utilities */
.container{max-width:var(--maxw); margin-inline:auto; padding-inline: clamp(14px,3.2vw,28px)}
.stack > * + *{margin-top:clamp(10px, 1.2vw, 16px)}
.cluster{display:flex; flex-wrap:wrap; gap:clamp(8px,1.1vw,14px); align-items:center}
.grid{display:grid; gap:clamp(16px,1.6vw,26px)}
.center{text-align:center}
.lead{font-size:clamp(16px,1.9vw,20px); color:var(--muted)}

/* Skip link for accessibility */
.skip-link{
  position:fixed; left:12px; top:-40px; background:#fff; color:#000;
  padding:10px 14px; border-radius:8px; box-shadow:var(--shadow); z-index:2000;
  transition:transform var(--dur) var(--ease), top var(--dur) var(--ease);
  transform:translateY(-10px)
}
.skip-link:focus{top:12px; outline:2px dashed #000; outline-offset:2px; transform:none}

/* Header */
.site-header{
  position:fixed; inset-inline:0; top:0; z-index:1000;
  backdrop-filter: none;
  background: color-mix(in oklab, #ffffff 55%, transparent);
  border-bottom:1px solid color-mix(in oklab, #000 12%, transparent);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
}
@supports (backdrop-filter: blur(8px)){
  .site-header.scrolled{ backdrop-filter: blur(8px); background: color-mix(in oklab, #ffffff 72%, transparent) }
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding: clamp(12px, 1.2vw, 16px) 0;
}
.brand{
  font-family: ui-sans-serif, "Optima", "Avenir Next", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
  letter-spacing:.04em;
  font-weight:600;
  font-size: clamp(17px, 2vw, 20px);
}
.nav ul{list-style:none; margin:0; padding:0}
.nav a{
  display:inline-block; padding:10px 12px; border-radius:10px;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.nav a:hover{ background: color-mix(in oklab, #000 6%, transparent); transform: translateY(-1px) }
.nav a:focus{ outline: 2px dashed #000; outline-offset: 3px }

/* Hero */
.hero{
  min-height: 78svh;
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  align-items:center;
  gap: clamp(18px, 2.6vw, 40px);
  padding-top: clamp(92px, 12vw, 158px);
  padding-bottom: clamp(28px, 5vw, 52px);
}
.hero .visual{
  position:relative; border-radius: var(--radius); overflow:hidden; box-shadow: var(--shadow);
  background: #EAE6E2;
}
.hero .visual img{
  width:100%; height: 60vh; min-height: 440px; object-fit:cover; object-position:center;
  transform: scale(1.02);
  transition: transform 1200ms var(--ease);
}
.hero .visual::after{
  /* soft vignette edge */
  content:""; position:absolute; inset:0; pointer-events:none;
  background: radial-gradient(120% 120% at 80% -10%, transparent 0 46%, rgba(0,0,0,.06) 75%);
}
.hero .content h1{
  font-size: clamp(30px, 4.8vw, 56px);
  line-height: 1.05;
  margin:0 0 16px;
  font-weight:600;
  letter-spacing:.01em;
}
.hero .content p{ margin:0; color:var(--muted) }
.cta{ display:inline-flex; gap:10px; align-items:center; margin-top:16px; padding:8px 12px; border-radius:10px;
  border:1px solid color-mix(in oklab, #000 16%, transparent);
  background: color-mix(in oklab, #fff 70%, transparent);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease)
}
.cta:hover{ transform: translateY(-1px) }
.cta:focus{ outline:2px dashed #000; outline-offset:3px }

/* Sections */
.section{
  padding-block: clamp(38px, 7vw, 90px);
  background: linear-gradient(180deg, transparent, transparent 40%, color-mix(in oklab, #000 1.5%, transparent));
}
.section.alt{ background: var(--bg-2) }
.section .eyebrow{
  text-transform:uppercase; letter-spacing:.12em; font-size:.8rem; color:var(--accent-2)
}
.section h2{ font-size: clamp(26px, 3.2vw, 40px); line-height:1.12; margin:8px 0 12px }
.section p{ color:var(--muted) }

/* Grid Cards */
.cards{ grid-template-columns: repeat(12, 1fr) }
.card{
  grid-column: span 6; border-radius: var(--radius); overflow:hidden; background:#fff; box-shadow: var(--shadow);
  display:grid; grid-template-rows: auto 1fr; min-height: 280px;
}
.card .media{ aspect-ratio: 3/2; background:#E9E5E2; overflow:hidden }
.card .media img{ width:100%; height:100%; object-fit:cover; transform: scale(1.01); transition: transform 600ms var(--ease) }
.card:hover .media img{ transform: scale(1.06) }
.card .body{ padding: clamp(12px, 1.4vw, 18px) }
.card h3{ margin:0 0 4px; font-size: clamp(16px,1.8vw,20px) }
.card p{ margin:0; color:var(--muted) }

/* Story page */
.hero.story .visual img{ height: 54vh; min-height: 380px }
.prose{ max-width: 72ch; margin-inline:auto; font-size: clamp(17px, 1.9vw, 19px) }
.prose p + p{ margin-top: 1em }
blockquote{
  margin: 1.4em 0; padding: 1em 1.2em; border-left: 4px solid var(--accent);
  background: color-mix(in oklab, #fff 80%, transparent); border-radius: 10px;
  color: var(--muted);
}

/* Footer */
.site-footer{
  padding-block: 28px; color: #3a3837;
  border-top:1px solid color-mix(in oklab, #000 12%, transparent);
  background: linear-gradient(180deg, color-mix(in oklab, #fff 60%, transparent), transparent);
}
.site-footer .cluster{ justify-content:space-between }
.site-footer a{ opacity:.9 }
.site-footer a:hover{ opacity:1 }

/* Reveal Animations (IntersectionObserver hooks) */
.reveal{ opacity:0; transform: translateY(16px); transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease) }
.reveal.in{ opacity:1; transform:none }
.stagger > *{ opacity:0; transform: translateY(14px) }
.stagger.in > *{ opacity:1; transform: none }
.stagger.in > *{ transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease) }
.stagger.in > *:nth-child(1){ transition-delay: 40ms }
.stagger.in > *:nth-child(2){ transition-delay: 90ms }
.stagger.in > *:nth-child(3){ transition-delay: 140ms }
.stagger.in > *:nth-child(4){ transition-delay: 190ms }
.stagger.in > *:nth-child(5){ transition-delay: 240ms }

/* Focus + tap targets */
a, button{ min-height: 44px }
:focus-visible{ outline: 2px dashed #111; outline-offset: 3px }

/* Responsive */
@media (max-width: 980px){
  .hero{ grid-template-columns: 1fr; }
  .hero .visual img{ height: 54vh; min-height: 400px }
  .card{ grid-column: span 12 }
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important }
  .reveal, .stagger > *{ opacity:1 !important; transform:none !important }
}