/* =============================================================
   portfolio.html — page-specific styles
   Shared design system lives in css/site.css. Only what's unique
   to the case-study layout belongs here.
   ============================================================= */

/* ── Hero ── */
.portfolio-hero {
  position: relative;
  padding: calc(var(--nav-h) + 80px) 0 80px;
}
.portfolio-hero h1 { color: var(--text); margin-bottom: 24px; }
.portfolio-hero__sub {
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 32px;
}
.portfolio-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ── Case studies wrapper ── */
.case-studies { padding: 40px 0 120px; }

.case-study {
  position: relative;
  padding: 56px 0;
  border-top: 1px solid var(--border);
}
.case-study:first-of-type { border-top: none; padding-top: 24px; }

.case-study__head {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 24px;
  margin-bottom: 40px;
  align-items: start;
}
.case-study__num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  padding-top: 8px;
}
.case-study__meta { min-width: 0; }
.case-study__title {
  color: var(--text);
  margin: 12px 0 18px;
  max-width: 880px;
}
.case-study__lede {
  color: var(--text-muted);
  max-width: 720px;
}

/* ── Body: challenge / approach / outcome ── */
.case-study__body {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
.case-study__panel {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}
.case-study__panel:hover {
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: 0 8px 40px var(--glow);
  transform: translateY(-2px);
}
.case-study__sub {
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.case-study__panel p { color: var(--text-muted); }

/* ── Metric tiles ── */
.case-study__metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.metric-tile {
  position: relative;
  padding: 20px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.04), rgba(217, 70, 239, 0.04));
  overflow: hidden;
}
.metric-tile::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent2), transparent);
  opacity: 0.4;
}
.metric-tile__label {
  color: var(--accent);
  font-family: var(--font-mono);
  margin-bottom: 10px;
}
.metric-tile__value {
  font-family: var(--font-heading);
  font-weight: 200;
  font-size: 1.375rem;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 6px;
  word-break: break-word;
}
.metric-tile__hint { color: var(--text-dim); }

/* ── Verbatim quote ── */
.case-study__quote {
  border-left: 2px solid var(--accent2);
  padding: 18px 0 18px 24px;
  margin: 8px 0 28px;
}
.case-study__quote blockquote {
  color: var(--text);
  font-family: var(--font-heading);
  font-weight: 200;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.case-study__attr {
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ── Screenshot placeholder ── */
.case-study__shot {
  border: 1px dashed rgba(217, 70, 239, 0.3);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.015);
  padding: 60px 24px;
  text-align: center;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

/* ── CTA ── */
.portfolio-cta {
  padding: 80px 0 120px;
  border-top: 1px solid var(--border);
}
.portfolio-cta__inner { max-width: 720px; }
.portfolio-cta__inner h2 { color: var(--text); margin-bottom: 16px; }
.portfolio-cta__inner p { color: var(--text-muted); margin-bottom: 28px; }
.portfolio-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .case-study__body { grid-template-columns: 1fr; }
  .case-study__metrics { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .portfolio-hero { padding: calc(var(--nav-h) + 48px) 0 56px; }
  .case-study { padding: 40px 0; }
  .case-study__head {
    grid-template-columns: 1fr;
    gap: 8px;
    margin-bottom: 28px;
  }
  .case-study__num { padding-top: 0; }
}