/* ============================================================
   ZENOS - Open Source Page Styles (Dark Theme)
   ============================================================ */

.os-hero {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-2xl);
  background: var(--black);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.os-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(84, 255, 224, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 30%, rgba(123, 112, 251, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.os-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(84, 255, 224, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(84, 255, 224, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 70%);
}

.os-hero h1 {
  margin-bottom: var(--space-md);
}

.os-hero p {
  max-width: 600px;
  opacity: 0.6;
  margin-bottom: var(--space-lg);
}

.os-hero .btn { margin-right: var(--space-sm); }

/* Project cards */
.os-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.os-card {
  padding: var(--space-lg);
  transition: all var(--duration-mid) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.os-card:hover {
  /* no movement */
}

.os-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.os-card__badges {
  display: flex;
  gap: var(--space-xs);
}

.os-card__name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.os-card__tagline {
  font-size: 0.875rem;
  color: var(--cyan);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.os-card__desc {
  font-size: 0.9375rem;
  opacity: 0.6;
  line-height: 1.6;
  flex-grow: 1;
}

.os-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.tech-tag {
  padding: 0.25rem 0.625rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border-dark);
  opacity: 0.6;
}

@media (max-width: 768px) {
  .os-cards {
    grid-template-columns: 1fr;
  }
}

/* Detail sections */
.os-detail {
  padding: var(--section-padding) 0;
  background: var(--black);
  color: var(--white);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.os-detail--alt {
  background: #060610;
}

.os-detail__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.os-detail__title {
  font-size: clamp(2rem, 1.5rem + 1.5vw, 3rem);
}

.os-detail__tagline {
  font-size: 1rem;
  color: var(--cyan);
  font-weight: 600;
}

/* Architecture diagram */
.arch-diagram {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.arch-layer {
  padding: var(--space-md);
  border-radius: var(--radius-md);
}

.arch-layer--core {
  border: 1px solid var(--purple);
  background: rgba(123, 112, 251, 0.05);
}

.arch-layer--ext {
  border: 1px solid var(--border-dark);
  background: rgba(0, 0, 0, 0.3);
}

.arch-layer__label {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--purple-tint);
  margin-bottom: var(--space-sm);
}

.arch-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.arch-items span {
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  border: 1px solid var(--border-dark);
  background: rgba(0, 0, 0, 0.3);
}

/* Repo table */
.repo-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-md) 0;
}

.repo-table th {
  text-align: left;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--purple-tint);
  padding: var(--space-sm);
  border-bottom: 1px solid var(--border-dark);
}

.repo-table td {
  padding: var(--space-sm);
  font-size: 0.875rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  opacity: 0.7;
}

.repo-table a {
  color: var(--cyan);
  font-weight: 600;
}

.repo-table a:hover {
  text-decoration: underline;
}

/* Roadmap */
.roadmap {
  display: flex;
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
  align-items: stretch;
}

.roadmap__item {
  flex: 1;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-dark);
  background: rgba(0, 0, 0, 0.3);
}

.roadmap__item--active {
  border-color: var(--cyan);
  background: rgba(84, 255, 224, 0.04);
}

.roadmap__phase {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--purple-tint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.roadmap__label {
  display: block;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  margin: var(--space-xs) 0;
}

.roadmap__status {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--cyan);
  margin-bottom: var(--space-sm);
}

.roadmap__desc {
  font-size: 0.8125rem;
  opacity: 0.5;
  line-height: 1.6;
}

.roadmap__connector {
  display: flex;
  align-items: center;
  color: var(--border-dark);
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 20px;
  justify-content: center;
}

.roadmap__connector::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--border-dark);
}

@media (max-width: 768px) {
  .roadmap {
    flex-direction: column;
  }
  .roadmap__connector {
    width: auto;
    height: 20px;
  }
  .roadmap__connector::before {
    width: 2px;
    height: 20px;
  }
}