/* ═══════════════════════════════════════════════
   features.css — Feature cards, Architecture, Code blocks
   OpenRelay · FIKSI 2026
═══════════════════════════════════════════════ */

/* ── FEATURES HERO ── */
.features-hero {
  padding: 72px 24px 0;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

/* ── FEATURE GRID ── */
.features-section { position: relative; z-index: 1; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 56px;
}

.feature-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.4s ease, transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
  cursor: default;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card:hover {
  border-color: var(--border2);
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4), 0 0 20px rgba(245, 158, 11, 0.06);
}

.feature-card.highlight {
  border-color: var(--border2);
  background: linear-gradient(145deg, var(--bg2), var(--bg3));
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--amber-dim), rgba(245, 158, 11, 0.06));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.2);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.08));
}

.feature-title {
  font-family: 'Chakra Petch', monospace;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 10px;
  letter-spacing: 0.2px;
}

.feature-desc {
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.65;
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 14px;
  font-family: 'Chakra Petch', monospace;
  font-size: 10px;
  color: var(--amber);
  letter-spacing: 0.5px;
}

/* ── ARCHITECTURE SECTION ── */
.arch-section {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.arch-flow {
  margin-top: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 0;
  padding-bottom: 8px;
}

.arch-node {
  flex-shrink: 0;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  text-align: center;
  min-width: 148px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.arch-node:hover {
  border-color: var(--border2);
  box-shadow: var(--shadow-amber);
}

.arch-node-icon { font-size: 24px; margin-bottom: 10px; }

.arch-node-name {
  font-family: 'Chakra Petch', monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 4px;
}

.arch-node-sub {
  font-size: 11px;
  color: var(--text-dim);
  font-family: 'Chakra Petch', monospace;
}

.arch-arrow {
  flex-shrink: 0;
  padding: 0 10px;
  color: var(--amber);
  font-size: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.arch-arrow-label {
  font-size: 9px;
  color: var(--text-muted);
  font-family: 'Chakra Petch', monospace;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

/* ── LAYER DIAGRAM ── */
.arch-layers {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.arch-layer {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.arch-layer-num {
  font-family: 'Chakra Petch', monospace;
  font-size: 32px;
  font-weight: 700;
  color: var(--border2);
  margin-bottom: 8px;
  line-height: 1;
}

.arch-layer-name {
  font-family: 'Chakra Petch', monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--amber);
  margin-bottom: 12px;
}

.arch-layer-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.arch-layer-item {
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

.arch-layer-item::before {
  content: '›';
  color: var(--amber);
  font-weight: 700;
}

/* ── CODE BLOCKS ── */
.code-section { position: relative; z-index: 1; }

.code-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 52px;
}

.code-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-header {
  background: var(--bg3);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.code-dots { display: flex; gap: 6px; }
.code-dot  { width: 10px; height: 10px; border-radius: 50%; }

.code-filename {
  font-family: 'Chakra Petch', monospace;
  font-size: 11px;
  color: var(--text-dim);
  margin-left: 4px;
  letter-spacing: 0.3px;
}

.code-lang {
  margin-left: auto;
  font-family: 'Chakra Petch', monospace;
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.code-body {
  padding: 20px;
  font-family: 'Chakra Petch', monospace;
  font-size: 12.5px;
  line-height: 1.9;
  color: #94a3b8;
  overflow-x: auto;
}

.code-body .kw  { color: var(--blue); }
.code-body .str { color: var(--green); }
.code-body .num { color: var(--amber); }
.code-body .cmt { color: var(--text-muted); font-style: italic; }
.code-body .fn  { color: #e879f9; }
.code-body .var { color: #f1a1f1; }

/* ── RELAY ARCH TABLE ── */
.relay-arch {
  margin-top: 48px;
}

.relay-arch-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.relay-arch-table thead tr {
  background: var(--bg3);
  border-bottom: 1px solid var(--border2);
}

.relay-arch-table th {
  padding: 12px 20px;
  text-align: left;
  font-family: 'Chakra Petch', monospace;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.relay-arch-table td {
  padding: 11px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  vertical-align: middle;
}

.relay-arch-table tbody tr:hover { background: rgba(255,255,255,0.015); }

.relay-arch-table td:first-child {
  font-family: 'Chakra Petch', monospace;
  color: var(--amber);
  font-size: 12px;
}

.relay-arch-table td .mono-sm {
  font-family: 'Chakra Petch', monospace;
  font-size: 11px;
  color: var(--green);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
  .arch-layers   { grid-template-columns: 1fr; }
  .code-grid     { grid-template-columns: 1fr; }
  .arch-flow     { justify-content: flex-start; }
}

@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
}