/* ═══════════════════════════════════════════════════════
   Enakta Labs — Cluster Designer
   Design system matching enakta.com
   ═══════════════════════════════════════════════════════ */

:root {
  --bg:        #060a14;
  --bg-card:   #0a0f1a;
  --bg-deep:   #050810;
  --border:    #141e30;
  --border-hi: #1e3a6a;
  --text:      #b0c4d8;
  --text-dim:  #3a5a7a;
  --text-xdim: #2a4060;
  --text-hi:   #e4ecf4;
  --accent:    #4a9eff;
  --accent-dk: #1a3a6a;
  --green:     #4aff8a;
  --green-dk:  #3a8a5a;
  --cta-bg:    #0a2a1a;
  --cta-border:#2a7a5a;
  --cta-text:  #7adfaa;
  --sans:      'Outfit', system-ui, -apple-system, sans-serif;
  --mono:      'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --max-w:     1120px;
  --hdr-h:     64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Grid background ────────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0;
  opacity: 0.025; pointer-events: none;
  background-image:
    linear-gradient(var(--accent) 1px, transparent 1px),
    linear-gradient(90deg, var(--accent) 1px, transparent 1px);
  background-size: 56px 56px;
}

/* ═══════════ HEADER ═══════════ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--hdr-h);
  background: rgba(6,10,20,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 0 24px; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  font-family: var(--mono); font-weight: 700; font-size: 1.3rem;
  color: var(--text-hi); letter-spacing: .15em;
  text-decoration: none;
}
.logo span { color: var(--accent); }
.header-nav {
  display: flex; align-items: center; gap: 28px;
}
.header-nav a {
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  color: var(--text-dim); text-decoration: none;
  transition: color 0.2s;
}
.header-nav a:hover { color: var(--text-hi); }
.nav-cta {
  background: linear-gradient(135deg, var(--accent-dk), #2a5a9a) !important;
  color: #b0d0ff !important; padding: 8px 18px !important;
  border-radius: 6px; font-weight: 600 !important;
}
.burger {
  display: none; background: none; border: none; cursor: pointer;
  width: 28px; height: 20px; position: relative;
}
.burger span {
  display: block; width: 100%; height: 2px; background: var(--text-dim);
  position: absolute; left: 0; transition: 0.25s;
}
.burger span:nth-child(1) { top: 0; }
.burger span:nth-child(2) { top: 9px; }
.burger span:nth-child(3) { top: 18px; }

@media (max-width: 840px) {
  .burger { display: block; }
  .header-nav {
    display: none; position: fixed; top: var(--hdr-h); left: 0; right: 0;
    background: rgba(6,10,20,0.97); backdrop-filter: blur(12px);
    flex-direction: column; padding: 20px 24px; gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .header-nav.open { display: flex; }
  .nav-cta { text-align: center; width: 100%; display: block !important; }
}

/* ═══════════ PAGE HERO ═══════════ */
.page-hero {
  position: relative; z-index: 1;
  padding: calc(var(--hdr-h) + 48px) 24px 32px;
  text-align: center;
}
.hero-inner { max-width: 680px; margin: 0 auto; }
.hero-badge {
  display: inline-block;
  font-family: var(--mono); font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 2.5px;
  color: var(--accent); border: 1px solid var(--accent-dk);
  padding: 5px 14px; border-radius: 20px; margin-bottom: 16px;
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 42px); font-weight: 700;
  color: var(--text-hi); letter-spacing: -0.5px; line-height: 1.15;
  margin-bottom: 14px;
}
.hero-sub {
  font-size: 14px; color: var(--text-dim); line-height: 1.7;
  font-family: var(--mono); font-size: 12px;
}

/* ═══════════ CONFIGURATOR ═══════════ */
.config-section {
  position: relative; z-index: 1;
  padding: 0 24px 64px;
}
.config-inner { max-width: var(--max-w); margin: 0 auto; }

/* Presets */
.presets {
  display: flex; gap: 8px; flex-wrap: wrap;
  align-items: center; margin-bottom: 16px;
}
.presets::before {
  content: 'PRESETS';
  font-family: var(--mono); font-size: 9px; font-weight: 600;
  color: var(--text-dim); letter-spacing: 1.5px; margin-right: 4px;
}

/* Grid */
.config-grid {
  display: grid; grid-template-columns: 1fr 340px; gap: 16px;
}
@media (max-width: 900px) {
  .config-grid { grid-template-columns: 1fr; }
}

.controls { display: flex; flex-direction: column; gap: 14px; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px; padding: 16px 18px;
}
.card-header {
  display: flex; justify-content: space-between;
  align-items: baseline; margin-bottom: 8px;
}
.card-label {
  font-family: var(--mono); font-size: 9px; font-weight: 600;
  color: var(--text-dim); text-transform: uppercase;
  letter-spacing: 1.5px; display: block;
}
.card-footer {
  display: flex; justify-content: space-between;
  margin-top: 8px; color: var(--text-xdim);
  font-size: 9.5px; font-family: var(--mono);
}
.node-count {
  color: var(--accent); font-size: 28px; font-weight: 700;
  font-family: var(--sans); line-height: 1;
}
.node-count small {
  font-size: 12px; color: var(--text-dim); font-weight: 400;
}

/* Slider */
.slider-wrap { margin: 4px 0; }
.slider-track {
  position: relative; height: 28px; cursor: pointer;
  display: flex; align-items: center;
}
.slider-track::before {
  content: ''; position: absolute; left: 0; right: 0;
  height: 4px; background: #080e1a; border-radius: 2px;
}
.slider-fill {
  position: absolute; left: 0; height: 4px;
  background: linear-gradient(90deg, #1a4a8a, var(--accent));
  border-radius: 2px; transition: width 0.15s;
}
.slider-thumb {
  position: absolute; width: 18px; height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #2a6adf);
  border: 2px solid #080e1a;
  box-shadow: 0 0 10px rgba(74,158,255,0.35);
  transform: translateX(-50%); transition: left 0.15s;
  z-index: 2;
}
.slider-labels {
  display: flex; justify-content: space-between;
  font-size: 9px; color: var(--text-xdim); font-family: var(--mono);
}

/* Buttons */
.chassis-btns { display: flex; gap: 6px; margin-top: 10px; }
.chassis-btns button {
  flex: 1; padding: 5px; background: #080e1a;
  border: 1px solid var(--border); border-radius: 4px;
  color: var(--text-dim); font-size: 10px;
  font-family: var(--mono); cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.chassis-btns button:hover { border-color: var(--accent-dk); color: var(--text); }

.btn-row { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.ec-row { gap: 5px; }

.sel-btn {
  background: transparent; border: 1px solid #182440;
  border-radius: 6px; padding: 9px 14px;
  color: var(--text-dim); font-size: 13px;
  font-family: var(--mono); cursor: pointer;
  font-weight: 400; transition: all 0.15s; white-space: nowrap;
}
.sel-btn.small { padding: 5px 10px; font-size: 11.5px; }
.sel-btn.active {
  background: linear-gradient(135deg, var(--accent-dk), #2a5a9a);
  border-color: #3a7adf; color: #b0d0ff; font-weight: 600;
}
.sel-btn .dim { opacity: 0.45; font-size: 10px; margin-left: 4px; }

.drive-specs {
  color: var(--text-dim); font-size: 9px;
  font-family: var(--mono); margin: 10px 0;
  line-height: 1.6;
}

/* ── Rack Panel ────────────────────────────────────── */
.rack-panel {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 10px;
  display: flex; flex-direction: column; align-items: center;
}
.rack-title {
  color: var(--text-dim); font-size: 9px;
  font-family: var(--mono); text-transform: uppercase;
  letter-spacing: 1.5px; margin-bottom: 4px;
  align-self: flex-start; padding-left: 6px;
}
.rack-title .rack-sub { color: var(--text-xdim); }
.rack-svg-wrap { width: 100%; display: flex; justify-content: center; }
.rack-svg-wrap svg { width: 100%; max-width: 280px; height: auto; }
.rack-legend {
  display: flex; gap: 14px; margin-top: 8px;
  flex-wrap: wrap; justify-content: center;
}
.legend-item { display: flex; align-items: center; gap: 4px; }
.legend-swatch {
  width: 7px; height: 7px; border-radius: 1px;
  border: 1px solid;
}
.legend-item span {
  color: var(--text-dim); font-size: 8px; font-family: var(--mono);
}
.rack-multi {
  margin-top: 8px; padding: 8px 12px;
  background: #080e1a; border: 1px solid var(--border);
  border-radius: 6px; text-align: center;
  width: 100%; display: none;
}
.rack-multi .big {
  color: var(--accent); font-size: 22px;
  font-weight: 700; font-family: var(--sans);
}
.rack-multi .label {
  color: var(--text-dim); font-size: 10px;
  font-family: var(--mono); margin-left: 6px;
}
.rack-multi .sub {
  color: var(--text-xdim); font-size: 9px;
  font-family: var(--mono); margin-top: 2px;
}

/* ── Stats ────────────────────────────────────────── */
.stats-section { margin-top: 16px; }
.section-label {
  display: block; margin-bottom: 8px;
  font-family: var(--mono); font-size: 9px; font-weight: 600;
  color: var(--text-dim); text-transform: uppercase;
  letter-spacing: 1.5px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 16px;
  position: relative; overflow: hidden;
}
.stat-card.accent {
  background: linear-gradient(145deg, #0a1628, #122040);
  border-color: var(--border-hi);
}
.stat-card.accent::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, #1a5aaf, var(--accent), #1a5aaf);
}
.stat-label {
  color: var(--text-dim); font-size: 9px;
  font-family: var(--mono); text-transform: uppercase;
  letter-spacing: 1.5px; margin-bottom: 5px;
}
.stat-value {
  font-size: 21px; font-weight: 700;
  font-family: var(--sans); letter-spacing: -0.5px;
}
.stat-card.accent .stat-value { color: var(--accent); }
.stat-card:not(.accent) .stat-value { color: #d0dce8; }
.stat-sub {
  color: #2e4a6a; font-size: 9.5px;
  font-family: var(--mono); margin-top: 4px;
}

/* ── Performance ──────────────────────────────────── */
.perf-section { margin-top: 16px; }
.perf-card { padding: 18px 20px; }
.perf-header {
  display: flex; justify-content: space-between;
  align-items: baseline; margin-bottom: 14px;
  flex-wrap: wrap; gap: 6px;
}
.perf-note {
  color: #1e3050; font-size: 8.5px; font-family: var(--mono);
}
.perf-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 640px) { .perf-grid { grid-template-columns: 1fr; } }
.perf-sub-title {
  color: #6a8aaa; font-size: 10px; font-weight: 600;
  font-family: var(--mono); margin-bottom: 4px;
}
.perf-disclaimer {
  color: var(--text-xdim); font-size: 8px;
  font-family: var(--mono); font-style: italic;
  margin-bottom: 8px;
}
.perf-per-node {
  color: #1e3050; font-size: 9px;
  font-family: var(--mono); margin-top: 2px;
}

.bar-wrap { margin-bottom: 12px; }
.bar-header { display: flex; justify-content: space-between; margin-bottom: 4px; }
.bar-label { color: #6a8aaa; font-size: 11px; font-family: var(--mono); }
.bar-value { color: #c0d8ff; font-size: 13px; font-weight: 600; font-family: var(--sans); }
.bar-track { height: 5px; background: #080e1a; border-radius: 3px; }
.bar-fill { height: 100%; border-radius: 3px; transition: width 0.35s ease; }

/* ── Per-Node ─────────────────────────────────────── */
.node-section { margin-top: 16px; }
.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px; margin-top: 12px;
}
.node-card {
  background: var(--bg-deep); border-radius: 7px;
  padding: 12px; border: 1px solid #0f1520;
}
.node-card-label {
  color: var(--text-dim); font-size: 8px;
  font-family: var(--mono); text-transform: uppercase;
  letter-spacing: 1.2px; margin-bottom: 5px;
}
.node-card-value {
  color: #c0d8ff; font-size: 12.5px; font-weight: 600;
}
.node-card-sub {
  color: var(--text-xdim); font-size: 9px;
  font-family: var(--mono); margin-top: 3px;
}

/* ── Actions ──────────────────────────────────────── */
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.btn-primary {
  flex: 1; min-width: 180px; padding: 13px 20px;
  background: linear-gradient(135deg, var(--accent-dk), #2a5a9a);
  border: 1px solid #3a7adf; border-radius: 8px;
  color: #b0d0ff; font-size: 13px; font-weight: 600;
  font-family: var(--sans); cursor: pointer; text-align: center;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.85; }
.btn-secondary {
  flex: 1; min-width: 180px; padding: 13px 20px;
  background: linear-gradient(135deg, var(--cta-bg), #103828);
  border: 1px solid var(--cta-border); border-radius: 8px;
  color: var(--cta-text); font-size: 13px; font-weight: 600;
  font-family: var(--sans); text-decoration: none;
  text-align: center; display: block; transition: opacity 0.2s;
}
.btn-secondary:hover { opacity: 0.85; }

/* ═══════════ FOOTER ═══════════ */
.site-footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--border);
  padding: 48px 24px 24px;
  background: var(--bg-deep);
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px; margin-bottom: 32px;
}
@media (max-width: 768px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-top { grid-template-columns: 1fr; }
}
.footer-brand .logo { display: block; margin-bottom: 12px; }
.footer-brand p {
  color: var(--text-dim); font-size: 13px; line-height: 1.6;
}
.footer-col h5 {
  color: var(--text-hi); font-size: 12px; font-weight: 600;
  margin-bottom: 12px; letter-spacing: 0.5px;
}
.footer-col a {
  display: block; color: var(--text-dim); font-size: 13px;
  text-decoration: none; margin-bottom: 8px; transition: color 0.2s;
}
.footer-col a:hover { color: var(--text); }
.footer-col a.footer-active { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between;
  align-items: center; padding-top: 24px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom span {
  color: var(--text-xdim); font-size: 12px; font-family: var(--mono);
}
.footer-social { display: flex; gap: 20px; }
.footer-social a {
  color: var(--text-dim); font-size: 12px;
  text-decoration: none; transition: color 0.2s;
}
.footer-social a:hover { color: var(--text); }

.site-disclaimer {
  position: relative; z-index: 1;
  text-align: center; padding: 16px 24px;
  color: #1e3050; font-size: 9px;
  font-family: var(--mono); line-height: 1.8;
  background: var(--bg-deep);
}

/* ═══════════ ANIMATIONS ═══════════ */
.fade-in {
  opacity: 0; transform: translateY(16px);
  transition: all 0.5s cubic-bezier(0.16,1,0.3,1);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }