/* ── Project page styles ── */

.project { padding-top: 5rem; }

/* Back link */
.proj-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  color: var(--text-sec);
  margin-bottom: 2rem;
  transition: color .2s;
}
.proj-back:hover { color: var(--text-primary); }

/* Hero */
.proj-hero { max-width: var(--max-w); margin: 0 auto; padding: 3rem var(--pad) 0; }
.proj-hero__inner { margin-bottom: 3.5rem; }

.proj-hero__meta {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-top: .75rem;
  margin-bottom: 1.5rem;
}

.proj-hero__title {
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: .95;
  margin-bottom: 1rem;
}

.proj-hero__site-link {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 1rem;
  transition: color .2s;
}
.proj-hero__site-link:hover { color: var(--accent-hover); text-decoration: underline; }

.proj-hero__tagline {
  font-size: 1.25rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 2.5rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 1rem;
}

.proj-hero__details {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  padding: 1.75rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.proj-detail { display: flex; flex-direction: column; gap: 0.5rem; }
.proj-detail__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--text-muted);
}
.proj-detail__value {
  font-size: 1rem;
  color: var(--text-sec);
  font-weight: 400;
}

/* Cover image */
.proj-hero__cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/8;
  background: var(--surface);
}
.proj-hero__cover img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* Sections */
.proj-section {
  padding: 5rem var(--pad);
  max-width: var(--max-w);
  margin: 0 auto;
}
.proj-section__inner { }

.proj-section--split {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 5rem;
  align-items: start;
}

.proj-section__title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -.025em;
  line-height: 1.1;
  margin-top: .75rem;
}

.proj-text {
  color: var(--text-sec);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
}
.proj-text strong { color: var(--text-primary); font-weight: 600; }
.proj-text:last-child { margin-bottom: 0; }

/* Full-width images */
.proj-image { padding: 0 var(--pad); max-width: var(--max-w); margin: 0 auto 0; }
.proj-image--full {
  max-width: 100%;
  padding: 0;
  margin: 0;
  background: var(--surface-2);
}
.proj-image--full img {
  width: 100%;
  display: block;
  max-height: 80vh;
  object-fit: cover;
}

/* Image pair */
.proj-image-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--surface-2);
}
.proj-image-pair__item { overflow: hidden; aspect-ratio: 4/3; }
.proj-image-pair__item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.proj-image-pair__item:hover img { transform: scale(1.03); }

/* Protocol pillars */
.proj-pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
.proj-pillar {
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.proj-pillar__num {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: 1rem;
}
.proj-pillar__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}
.proj-pillar__desc {
  font-size: 1rem;
  color: var(--text-sec);
  line-height: 1.65;
}

/* User flow steps */
.proj-flow {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.proj-flow__step {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 1rem;
  color: var(--text-sec);
}
.proj-flow__step:first-child { border-top: 1px solid var(--border); }
.proj-flow__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* DS cards */
.proj-ds-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}
.proj-ds-card {
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .2s;
}
.proj-ds-card:hover { border-color: var(--border-strong); }
.proj-ds-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.proj-ds-card__desc {
  font-size: 1rem;
  color: var(--text-sec);
  line-height: 1.65;
}
.proj-ds-card__desc em { color: var(--text-primary); font-style: normal; font-weight: 500; }

/* Closing */
.proj-closing {
  padding: 6rem var(--pad) 5rem;
  max-width: var(--max-w);
  margin: 0 auto;
  border-top: 1px solid var(--border);
}
.proj-closing__inner { max-width: 520px; }
.proj-closing__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -.025em;
  margin: .75rem 0 1.25rem;
}
.proj-closing__text {
  color: var(--text-sec);
  font-size: 1rem;
  line-height: 1.75;
}

/* Project nav footer */
.proj-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2.5rem var(--pad);
  max-width: var(--max-w);
  margin: 0 auto;
  border-top: 1px solid var(--border);
}
.proj-nav__back {
  font-size: 1rem;
  color: var(--text-sec);
  transition: color .2s;
}
.proj-nav__back:hover { color: var(--text-primary); }
.proj-nav__next { text-align: right; }
.proj-nav__label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.proj-nav__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-sec);
  transition: color .2s;
}
.proj-nav__title:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 1024px) {
  .proj-pillars { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .proj-section--split { grid-template-columns: 1fr; gap: 2rem; }
  .proj-pillars { grid-template-columns: 1fr; }
  .proj-ds-grid { grid-template-columns: 1fr; }
  .proj-image-pair { grid-template-columns: 1fr; }
  .proj-hero__details { gap: 1.75rem; }
  .proj-hero__cover { aspect-ratio: 16/10; }
}