:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #182234;
  --border-color: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #38bdf8;
  --accent-cyan: #22d3ee;
  --success-green: #4ade80;
  --warning-amber: #fbbf24;
  --danger-red: #f87171;
  --tag-bg: #1e293b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  padding: 0;
  margin: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background-color: #1e293b;
  color: var(--accent-cyan);
  padding: 2px 8px;
  border-radius: 9999px;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.header-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}

.header-links a:hover {
  color: var(--accent-blue);
}

/* Persistent Disclaimer Banner */
.notice-banner {
  background-color: rgba(251, 191, 36, 0.1);
  border-left: 4px solid var(--warning-amber);
  padding: 12px 16px;
  margin-bottom: 24px;
  border-radius: 4px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.notice-banner svg {
  flex-shrink: 0;
  color: var(--warning-amber);
  margin-top: 2px;
}

.notice-banner p {
  font-size: 0.875rem;
  color: #fef3c7;
}

/* Controls Section */
.controls-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 28px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  align-items: end;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.control-input {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.control-input:focus {
  border-color: var(--accent-blue);
}

.slider-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.slider-input {
  accent-color: var(--accent-blue);
  cursor: pointer;
  width: 100%;
}

.slider-markers {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* KPI Summary Bar */
.kpi-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.kpi-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px;
  text-align: left;
}

.kpi-title {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.kpi-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

.kpi-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Device Comparison Grid */
.section-heading {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.device-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform 0.2s, border-color 0.2s;
  position: relative;
  overflow: hidden;
}

.device-card:hover {
  border-color: #475569;
}

.device-card.exceeds {
  opacity: 0.85;
  border-left: 4px solid var(--danger-red);
}

.device-card.fits {
  border-left: 4px solid var(--success-green);
}

.device-card.tight {
  border-left: 4px solid var(--warning-amber);
}

.device-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.device-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.device-vendor {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.badge {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-measured {
  background-color: rgba(74, 222, 128, 0.15);
  color: var(--success-green);
  border: 1px solid rgba(74, 222, 128, 0.3);
}

.badge-claimed {
  background-color: rgba(251, 191, 36, 0.15);
  color: var(--warning-amber);
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.badge-derived {
  background-color: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

/* Fit Indicator */
.fit-badge {
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  text-align: center;
}

.fit-badge.fits {
  background-color: rgba(74, 222, 128, 0.2);
  color: var(--success-green);
}

.fit-badge.tight {
  background-color: rgba(251, 191, 36, 0.2);
  color: var(--warning-amber);
}

.fit-badge.exceeds {
  background-color: rgba(248, 113, 113, 0.2);
  color: var(--danger-red);
}

/* Metric Rows */
.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  font-size: 0.875rem;
}

.metric-label {
  color: var(--text-secondary);
}

.metric-val {
  font-family: var(--font-mono);
  font-weight: 600;
}

.decode-highlight {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-blue);
}

.calibrated-band {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Software Stack Pills */
.software-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.sw-pill {
  font-size: 0.75rem;
  padding: 2px 8px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.sw-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.sw-production { background-color: var(--success-green); }
.sw-working { background-color: var(--accent-blue); }
.sw-experimental { background-color: var(--warning-amber); }
.sw-claimed { background-color: #cbd5e1; }

/* Educational & Explanatory section */
.edu-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 32px;
}

.edu-card h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
  color: var(--accent-blue);
}

.edu-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 12px;
}

.edu-card code {
  font-family: var(--font-mono);
  background-color: var(--bg-card);
  padding: 2px 6px;
  border-radius: 4px;
  color: #e2e8f0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 28px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.site-footer a {
  color: var(--accent-blue);
  text-decoration: none;
}

@media (max-width: 640px) {
  .controls-grid {
    grid-template-columns: 1fr;
  }
  .device-grid {
    grid-template-columns: 1fr;
  }
}