/* =====================================
   Lionel G.S. — Architecture-style site
   ===================================== */

:root {
  --bg: #ffffff;
  --text: #111213;
  --muted: #6b6f76;
  --line: #e8eaed;
  --accent: #3b82f6;

  --radius: 14px;
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  --maxw: 1200px;

  --step--1: clamp(.78rem, .72rem + .2vw, .9rem);
  --step-0: clamp(.95rem, .9rem + .3vw, 1.05rem);
  --step-1: clamp(1.1rem, 1.05rem + .4vw, 1.25rem);
  --step-2: clamp(1.35rem, 1.25rem + .6vw, 1.6rem);
  --step-3: clamp(1.7rem, 1.55rem + 1vw, 2.1rem);
  --step-4: clamp(2.1rem, 1.9rem + 1.4vw, 2.7rem);
  --step-5: clamp(2.6rem, 2.3rem + 1.8vw, 3.4rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0c0d;
    --text: #e9eaec;
    --muted: #a3a7ad;
    --line: #1b1d20;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: var(--step-0);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(140%) blur(6px);
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-4);
  align-items: center;
}
.brand { font-size: var(--step-2); font-weight: 600; letter-spacing: .02em; }

/* Mobile nav (no JS) */
.nav-toggle { display: none; }
.nav-btn {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px; background: transparent;
  place-items: center;
}
.nav-btn span { width: 20px; height: 2px; background: var(--text); display: block; position: relative; }
.nav-btn span::before, .nav-btn span::after {
  content: ""; position: absolute; left: 0; right: 0; height: 2px; background: var(--text);
}
.nav-btn span::before { top: -6px; }
.nav-btn span::after { top: 6px; }

#site-nav { display: flex; gap: var(--space-5); align-items: center; }
.nav-link { color: var(--muted); font-size: var(--step-0); }
.nav-link:hover { color: var(--text); text-decoration: none; }

@media (max-width: 900px) {
  .header-inner { grid-template-columns: auto auto; }
  .nav-btn { display: grid; }
  #site-nav { display: none; grid-column: 1 / -1; padding-top: var(--space-3); border-top: 1px solid var(--line); }
  .nav-toggle:checked ~ #site-nav { display: grid; gap: var(--space-3); }
}

/* Sections */
.section { padding: var(--space-7) var(--space-4); }
.container { max-width: var(--maxw); margin: 0 auto; }
.section h2 { font-size: var(--step-3); margin: 0 0 var(--space-4); }
.lede { color: var(--muted); font-size: var(--step-1); max-width: 70ch; }

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
.project-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: color-mix(in oklab, var(--bg) 96%, transparent);
  transition: transform .25s ease, box-shadow .25s ease;
}
.project-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px color-mix(in oklab, var(--text) 8%, transparent);
}
.project-inner {
  display: grid;
  gap: var(--space-5);
  padding: var(--space-5);
}
@media (min-width: 900px) {
  .project-inner { grid-template-columns: 1.2fr 1fr; align-items: start; }
  .project-card.alt .project-inner { grid-template-columns: 1fr 1.2fr; }
  .project-card.alt .project-text { order: 2; }
  .project-card.alt .project-media { order: 1; }
}
.project-title { font-size: var(--step-2); margin: 0 0 var(--space-2); }
.project-meta {
  color: var(--muted);
  font-size: var(--step--1);
  display: flex; flex-wrap: wrap; gap: var(--space-3);
}
.project-desc { margin-top: var(--space-3); max-width: 80ch; }

.project-media { border: 1px solid var(--line); border-radius: 12px; overflow: clip; }
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-3);
}
.media-grid img { width: 100%; height: auto; display: block; }

/* Shop */
.shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-4);
}
.product-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: color-mix(in oklab, var(--bg) 96%, transparent);
  transition: transform .2s ease, box-shadow .2s ease;
  display: grid;
  grid-template-rows: auto 1fr;
}
.product-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px color-mix(in oklab, var(--text) 8%, transparent);
}
.product-media img { width: 100%; height: auto; display: block; aspect-ratio: 4/3; object-fit: cover; }
.product-body { padding: var(--space-4); display: grid; gap: var(--space-3); }
.product-title { font-size: var(--step-1); margin: 0; }
.product-meta { display: flex; gap: var(--space-3); align-items: center; }
.badge {
  display: inline-block; padding: 0.25rem 0.5rem;
  border: 1px solid var(--line); border-radius: 999px;
  font-size: var(--step--1);
}
.muted { color: var(--muted); font-size: var(--step--1); }
.product-desc { color: var(--text); }
.product-actions { margin-top: var(--space-2); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.6rem 0.9rem; border-radius: 10px;
  border: 1px solid var(--line); background: transparent; cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: color-mix(in oklab, var(--bg) 92%, transparent); }
.btn.ghost { background: transparent; }

/* Dialog */
.enquiry::backdrop { background: rgba(0,0,0,.25); backdrop-filter: blur(2px); }
.enquiry { border: 1px solid var(--line); border-radius: var(--radius); padding: 0; width: min(640px, 92vw); }
.enquiry-form { padding: var(--space-5); display: grid; gap: var(--space-4); }
.enquiry-form h3 { margin: 0; font-size: var(--step-2); }
.enquiry-form label { display: grid; gap: .35rem; }
.enquiry-form input, .enquiry-form textarea {
  width: 100%; padding: .7rem .8rem; border-radius: 10px; border: 1px solid var(--line);
  background: color-mix(in oklab, var(--bg) 96%, transparent); color: var(--text);
}
.grid-2 { display: grid; gap: var(--space-3); grid-template-columns: 1fr; }
@media (min-width: 700px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
.enquiry-actions { display: flex; gap: var(--space-3); justify-content: flex-end; }

/* Contact & Footer */
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-6);
  background: color-mix(in oklab, var(--bg) 96%, transparent);
}
footer { border-top: 1px solid var(--line); padding: var(--space-5) var(--space-4); color: var(--muted); }
.foot-inner { max-width: var(--maxw); margin: 0 auto; display: flex; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; }
.foot-nav a { color: var(--muted); }
.foot-nav a:hover { color: var(--text); text-decoration: none; }

/* Motion preferences */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}