/* /open_source_projects — research hub (companion to DHS AI/ML Toolkit) */

.oss-page {
  --oss-accent: #059669;
  --oss-accent-deep: #047857;
  --oss-accent-soft: rgba(5, 150, 105, 0.12);
  --oss-warm: #d97706;
  --oss-warm-soft: rgba(217, 119, 6, 0.14);
  --oss-ink: #0f172a;
  --oss-muted: #64748b;
  margin-bottom: 2rem;
}

.oss-band {
  padding: 1.5rem 1.25rem 1.75rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.35);
  margin-bottom: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.oss-band--intro {
  background:
    linear-gradient(148deg, rgba(236, 253, 245, 0.95) 0%, rgba(255, 255, 255, 0.98) 42%, rgba(254, 243, 199, 0.35) 100%),
    repeating-linear-gradient(
      -12deg,
      transparent,
      transparent 10px,
      rgba(5, 150, 105, 0.04) 10px,
      rgba(5, 150, 105, 0.04) 11px
    );
}

.oss-band--projects {
  background: rgba(255, 255, 255, 0.96);
}

.oss-section-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  color: var(--oss-ink);
}

.oss-band__lead {
  margin: 0 0 1.25rem;
  max-width: 44rem;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--oss-muted);
}

.oss-pipeline {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  gap: 0.5rem 0.35rem;
}

.oss-pipeline__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  text-align: center;
  min-width: 5.5rem;
}

.oss-pipeline__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--oss-accent) 0%, var(--oss-warm) 100%);
  box-shadow: 0 0 0 4px var(--oss-accent-soft);
}

.oss-pipeline__label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--oss-muted);
  max-width: 10rem;
  line-height: 1.35;
}

.oss-pipeline__join {
  flex: 0 0 2rem;
  height: 3px;
  margin-bottom: 1.35rem;
  border-radius: 3px;
  background: linear-gradient(90deg, rgba(5, 150, 105, 0.2), rgba(217, 119, 6, 0.45), rgba(5, 150, 105, 0.2));
}

.oss-values {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .oss-values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.oss-value-card {
  padding: 1rem 1rem 1.1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(226, 232, 240, 0.95);
}

.oss-value-card__title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--oss-accent-deep);
  margin: 0 0 0.5rem;
}

.oss-value-card__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.55;
}

.oss-projects-head {
  margin-bottom: 1.35rem;
}

.oss-projects-head__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.oss-projects-head__sub {
  font-size: 0.92rem;
  max-width: 40rem;
  margin: 0;
}

.oss-project-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.oss-project-card {
  --oss-card-accent: var(--oss-accent);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding: 1.25rem 1.25rem 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(226, 232, 240, 0.95);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.oss-project-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.oss-project-card--python {
  --oss-card-accent: #2563eb;
}

.oss-project-card--r {
  --oss-card-accent: #7c3aed;
}

@media (min-width: 768px) {
  .oss-project-card {
    grid-template-columns: auto 1fr auto;
    align-items: start;
    gap: 1.25rem 1.5rem;
  }
}

.oss-project-card__index {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--oss-card-accent);
  opacity: 0.35;
  min-width: 2.5rem;
}

.oss-project-card__body {
  min-width: 0;
}

.oss-project-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.5rem;
  margin-bottom: 0.45rem;
}

.oss-project-card__lang {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: var(--oss-accent-soft);
  color: var(--oss-accent-deep);
}

.oss-project-card--python .oss-project-card__lang {
  background: rgba(37, 99, 235, 0.12);
  color: #1d4ed8;
}

.oss-project-card--r .oss-project-card__lang {
  background: rgba(124, 58, 237, 0.12);
  color: #6d28d9;
}

.oss-project-card__tag {
  font-size: 0.72rem;
  color: var(--oss-muted);
}

.oss-project-card__title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.55rem;
  line-height: 1.3;
}

.oss-project-card__title a {
  color: var(--oss-ink);
  text-decoration: none;
}

.oss-project-card__title a:hover {
  color: var(--oss-card-accent);
}

.oss-project-card__text {
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--oss-muted);
}

.oss-project-card__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.oss-project-card__chip {
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border-radius: 0.35rem;
  background: #f8fafc;
  border: 1px solid rgba(226, 232, 240, 0.9);
  color: var(--oss-ink);
}

.oss-project-card__actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: stretch;
  min-width: 10.5rem;
}

.oss-project-card__actions .btn {
  font-weight: 600;
  border-radius: 0.5rem;
}

.oss-link-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, var(--oss-accent-soft) 0%, rgba(255, 255, 255, 0.9) 55%);
  border: 1px solid rgba(5, 150, 105, 0.22);
}

.oss-link-band__text {
  margin: 0;
  font-size: 0.9rem;
  max-width: 36rem;
}

.oss-link-band__text a {
  font-weight: 600;
}