/* =============================================================
   SYSTEM COMPONENTS — LinkUp
   Aesthetic: technical "ledger" — numbered cards with side bars,
   asymmetric grid, mono-led typography. Distinct from prior sections.
   ============================================================= */

:root {
  --bg-deep: #06070b;
  --bg-elev: #0b0d14;
  --bg-card: #0e111a;
  --bg-card-2: #11151f;

  --text-primary: #eef1fb;
  --text-secondary: #a4adc7;
  --text-muted: #6b7392;

  --accent: #4f7df5;
  --accent-2: #34d6c1;

  --ok: #34d6c1;
  --warn: #f5b14f;
  --idle: #6b7392;

  --ok-glow: rgba(52, 214, 193, 0.45);
  --warn-glow: rgba(245, 177, 79, 0.45);

  --border: rgba(140, 160, 220, 0.10);
  --border-strong: rgba(140, 160, 220, 0.18);

  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;

  --mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --serif: "Instrument Serif", "Cormorant Garamond", Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ========== SECTION ========== */
.components-section {
  position: relative;
  padding: 100px 32px;
  overflow: hidden;
}

/* Backdrop FX */
.bg-fx {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.bg-radial {
  position: absolute;
  top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 1200px; height: 800px;
  background:
    radial-gradient(circle at 30% 30%, rgba(79, 125, 245, 0.18), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(52, 214, 193, 0.12), transparent 60%);
  filter: blur(80px);
}
.bg-noise {
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(140, 160, 220, 0.08) 1px, transparent 0);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse at 50% 40%, #000 30%, transparent 80%);
}

.container {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 0 auto;
}

/* ========== HEADER ========== */
.header {
  text-align: left;
  margin-bottom: 56px;
  max-width: 720px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,0.02);
  margin-bottom: 24px;
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 8px var(--ok-glow);
  animation: ping 2s ease-out infinite;
}
@keyframes ping {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(1.3); }
}
.eyebrow-sep { color: var(--border-strong); }
.eyebrow-meta { color: var(--text-secondary); }

.header h1 {
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 18px;
  color: var(--text-primary);
}
.header h1 em {
  font-style: italic;
  font-family: var(--serif);
  font-weight: 400;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
  padding-right: 4px;
}
.header p {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.6;
  max-width: 560px;
}

.legend {
  margin-top: 28px;
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.legend-item { display: inline-flex; align-items: center; gap: 8px; }
.ldot {
  width: 8px; height: 8px; border-radius: 50%;
  display: inline-block;
}
.ldot.green  { background: var(--ok);   box-shadow: 0 0 8px var(--ok-glow); }
.ldot.yellow { background: var(--warn); box-shadow: 0 0 8px var(--warn-glow); }
.ldot.gray   { background: var(--idle); }

/* ========== GRID ========== */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.span-2 { grid-column: span 4; }

/* ========== GROUP CARD ========== */
.group {
  position: relative;
  background: linear-gradient(180deg, var(--bg-card), var(--bg-card-2));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.group:hover {
  transform: translateY(-3px);
  border-color: rgba(79, 125, 245, 0.35);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5),
              0 0 0 1px rgba(79, 125, 245, 0.15);
}

/* Top inner highlight */
.group::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent, rgba(140, 160, 220, 0.4), transparent);
}

/* Side rule with index number */
.group::after {
  content: attr(data-index);
  position: absolute;
  bottom: 12px; right: 14px;
  font-family: var(--mono);
  font-size: 56px;
  font-weight: 300;
  line-height: 1;
  color: rgba(140, 160, 220, 0.05);
  letter-spacing: -0.04em;
  pointer-events: none;
}

/* HEAD */
.group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px dashed var(--border);
}
.group-index {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--accent);
  padding: 3px 7px;
  border: 1px solid rgba(79, 125, 245, 0.25);
  border-radius: 4px;
  background: rgba(79, 125, 245, 0.06);
}
.group-title {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.group-meta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.group-meta.warn { color: var(--warn); }

/* BODY */
.group-body {
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
}

.item {
  position: relative;
  display: grid;
  grid-template-columns: 4px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 14px 12px;
  border-radius: 10px;
  transition: background .2s ease;
}
.item:hover {
  background: rgba(79, 125, 245, 0.04);
}
.item + .item {
  border-top: 1px solid var(--border);
}

/* Vertical accent bar */
.item-bar {
  width: 3px;
  height: 22px;
  border-radius: 3px;
  background: var(--ok);
  box-shadow: 0 0 8px var(--ok-glow);
}
.item-bar.warn { background: var(--warn); box-shadow: 0 0 8px var(--warn-glow); }
.item-bar.gray { background: var(--idle); box-shadow: none; opacity: 0.5; }

.name {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1.3;
}
.name small {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  font-weight: 400;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,0.015);
  white-space: nowrap;
}
.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
}
.dot.green {
  background: var(--ok);
  box-shadow: 0 0 8px var(--ok-glow);
}
.dot.green::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 1px solid var(--ok);
  opacity: 0.5;
  animation: pulse-soft 2.4s ease-out infinite;
}
.dot.yellow {
  background: var(--warn);
  box-shadow: 0 0 8px var(--warn-glow);
}
.dot.gray {
  background: var(--idle);
  opacity: 0.6;
}
@keyframes pulse-soft {
  0%   { transform: scale(1);   opacity: 0.6; }
  100% { transform: scale(2.6); opacity: 0;   }
}

/* FOOT */
.group-foot {
  margin-top: auto;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.012);
  position: relative;
  z-index: 1;
}
.foot-key { color: var(--text-muted); }
.foot-val { color: var(--text-primary); font-size: 12px; }
.foot-val.warn { color: var(--warn); }

/* ========== PLATFORM BUILDS (span-2) ========== */
.group-body.builds {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 12px;
}
.group-body.builds .item {
  grid-template-columns: 4px auto 1fr auto;
  border-top: none;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255,255,255,0.015);
}
.group-body.builds .item:hover {
  border-color: rgba(79, 125, 245, 0.35);
}
.build-icon {
  width: 36px; height: 36px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid rgba(79, 125, 245, 0.3);
  border-radius: 10px;
  background: linear-gradient(180deg,
    rgba(79, 125, 245, 0.12), rgba(79, 125, 245, 0.04));
  letter-spacing: 0;
}
.build-icon.gray {
  color: var(--text-muted);
  border-color: var(--border-strong);
  background: rgba(255,255,255,0.02);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1100px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .span-2 { grid-column: span 2; }
  .group-body.builds { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .components-section { padding: 60px 16px; }
  .grid { grid-template-columns: 1fr; gap: 14px; }
  .span-2 { grid-column: span 1; }
  .header h1 { font-size: 36px; }
  .group::after { font-size: 44px; }
}