@import url('https://fonts.googleapis.com/css2?family=Work+Sans:wght@500;700&family=DM+Sans:wght@400;500&display=swap');

:root {
  --beige: #F5F0E8;
  --cream: #FFF9F2;
  --orange: #FF4F00;
  --brown: #3B2314;
  --brown-soft: #6B5544;
  --radius: 4px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; }

body {
  background: var(--beige);
  color: var(--brown);
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  min-height: 100vh;
}

/* ---- Layout ---- */
.site-header {
  background: var(--cream);
  border-bottom: 1px solid rgba(59,35,20,0.12);
  padding: 1.25rem 1.5rem;
}

.site-header a {
  text-decoration: none;
  color: var(--brown);
  font-family: 'Work Sans', sans-serif;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.site-header .brand-label {
  display: block;
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--brown-soft);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 0.125rem;
}

main { padding: 2rem 1.5rem; max-width: 1200px; margin: 0 auto; }

/* ---- Index grid ---- */
.proposals-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 640px) {
  .proposals-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .proposals-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ---- Proposal card ---- */
.proposal-card {
  background: var(--cream);
  border: 1px solid rgba(59,35,20,0.1);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: var(--brown);
  display: block;
  transition: border-color 0.15s;
}

.proposal-card:hover { border-color: var(--orange); }

.proposal-card .thumb {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
  background: var(--beige);
}

.proposal-card .card-body { padding: 1rem 1.125rem 1.25rem; }

.proposal-card .card-type {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--orange);
  font-family: 'DM Sans', sans-serif;
  margin-bottom: 0.4rem;
}

.proposal-card .card-title {
  font-family: 'Work Sans', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 0.375rem;
}

.proposal-card .card-date {
  font-size: 0.8rem;
  color: var(--brown-soft);
}

/* ---- Empty state ---- */
.empty-state {
  text-align: center;
  padding: 4rem 1.5rem;
  color: var(--brown-soft);
}

.empty-state code {
  font-family: monospace;
  background: rgba(59,35,20,0.08);
  padding: 0.15em 0.4em;
  border-radius: 2px;
  font-size: 0.875rem;
  color: var(--brown);
}

/* ---- Viewer ---- */
.viewer-header { margin-bottom: 1.5rem; }

.viewer-type {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--orange);
  font-family: 'DM Sans', sans-serif;
  margin-bottom: 0.5rem;
}

.viewer-title {
  font-family: 'Work Sans', sans-serif;
  font-weight: 700;
  font-size: 1.75rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.375rem;
}

@media (min-width: 640px) { .viewer-title { font-size: 2.25rem; } }

.viewer-date { font-size: 0.85rem; color: var(--brown-soft); }

/* ---- Artifact embeds ---- */
.artifact-iframe {
  width: 100%;
  aspect-ratio: 1;
  border: none;
  background: var(--beige);
  border-radius: var(--radius);
  display: block;
}

.artifact-video {
  width: 100%;
  border-radius: var(--radius);
  display: block;
  background: #000;
}

.artifact-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  display: block;
}

/* ---- Back link ---- */
.back-link {
  display: inline-block;
  margin-top: 2rem;
  font-size: 0.875rem;
  color: var(--brown-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.back-link:hover { color: var(--brown); border-bottom-color: var(--orange); }

/* ---- 404 ---- */
.not-found {
  text-align: center;
  padding: 6rem 1.5rem;
}

.not-found h1 {
  font-family: 'Work Sans', sans-serif;
  font-weight: 700;
  font-size: 4rem;
  color: var(--orange);
  letter-spacing: -0.04em;
}

.not-found p { margin: 1rem 0; color: var(--brown-soft); }
.not-found a { color: var(--brown); }