/* ============================================================
   GEOSignalOps Design System — CSS Variables & Shared Styles
   Section 2.4: Design Tokens
   ============================================================ */

:root {
  /* ---- Backgrounds ---- */
  --ds-bg-page: #0F172A;
  --ds-bg-card: #1E293B;
  --ds-bg-input: #334155;
  --ds-bg-sidebar: #0F172A;
  --ds-bg-elevated: #1E293B;

  /* ---- Primary / Accent ---- */
  --ds-primary: #10B981;          /* Signal Green */
  --ds-primary-hover: #059669;
  --ds-primary-bg: rgba(16, 185, 129, 0.08);
  --ds-accent: #3B82F6;           /* Electric Blue */
  --ds-accent-hover: #2563EB;
  --ds-accent-bg: rgba(59, 130, 246, 0.08);

  /* ---- Text ---- */
  --ds-text-primary: #F8FAFC;
  --ds-text-secondary: #94A3B8;
  --ds-text-muted: #64748B;

  /* ---- Status Colors ---- */
  --ds-green: #10B981;
  --ds-green-bg: rgba(16, 185, 129, 0.10);
  --ds-blue: #3B82F6;
  --ds-blue-bg: rgba(59, 130, 246, 0.10);
  --ds-amber: #F59E0B;
  --ds-amber-bg: rgba(245, 158, 11, 0.10);
  --ds-red: #EF4444;
  --ds-red-bg: rgba(239, 68, 68, 0.10);
  --ds-purple: #A78BFA;
  --ds-purple-bg: rgba(167, 139, 250, 0.10);

  /* ---- Borders ---- */
  --ds-border: #334155;
  --ds-border-emphasis: #475569;

  /* ---- Radius ---- */
  --ds-radius-sm: 4px;
  --ds-radius-md: 6px;
  --ds-radius-lg: 8px;
  --ds-radius-xl: 12px;

  /* ---- Typography ---- */
  --ds-font-sans: 'Inter', 'Instrument Sans', system-ui, sans-serif;
  --ds-font-head: 'Syne', 'Inter', sans-serif;
  --ds-font-mono: 'JetBrains Mono', monospace;

  /* ---- Spacing ---- */
  --ds-space-xs: 4px;
  --ds-space-sm: 8px;
  --ds-space-md: 16px;
  --ds-space-lg: 24px;
  --ds-space-xl: 32px;

  /* ---- Sidebar ---- */
  --ds-sidebar-width: 240px;
  --ds-sidebar-active-border: 3px;

  /* ---- Shadows ---- */
  --ds-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --ds-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --ds-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* ============================================================
   Status Badge Utility Classes
   ============================================================ */
.badge-published { background: var(--ds-green-bg); color: var(--ds-green); }
.badge-pending   { background: var(--ds-blue-bg);  color: var(--ds-blue); }
.badge-review    { background: var(--ds-amber-bg); color: var(--ds-amber); }
.badge-failed,
.badge-rejected  { background: var(--ds-red-bg);   color: var(--ds-red); }
.badge-approved  { background: var(--ds-green-bg); color: var(--ds-green); }

.status-badge-ds {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--ds-radius-sm);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: var(--ds-font-sans);
}

/* ============================================================
   Mono text utility
   ============================================================ */
.mono { font-family: var(--ds-font-mono); font-size: 12px; }

/* ============================================================
   Card — Design System variant
   ============================================================ */
.ds-card {
  background: var(--ds-bg-card);
  border: 1px solid var(--ds-border-emphasis);
  border-radius: var(--ds-radius-lg);
  padding: 20px;
}

/* ============================================================
   Nav — Active item with 3px green left border
   ============================================================ */
.nav-item-ds {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 0 var(--ds-radius-md) var(--ds-radius-md) 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--ds-text-secondary);
  text-decoration: none;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}
.nav-item-ds:hover {
  color: var(--ds-text-primary);
  background: rgba(255,255,255,0.04);
}
.nav-item-ds.active {
  color: var(--ds-primary);
  background: var(--ds-primary-bg);
  border-left-color: var(--ds-primary);
}
.nav-item-ds .nav-badge {
  margin-left: auto;
  background: var(--ds-primary);
  color: #0F172A;
  font-size: 9px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

/* ============================================================
   Buttons — Design System
   ============================================================ */
.ds-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--ds-radius-md);
  font-family: var(--ds-font-sans);
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
}
.ds-btn-primary   { background: var(--ds-primary); color: #0F172A; }
.ds-btn-primary:hover { filter: brightness(1.1); }
.ds-btn-danger    { background: var(--ds-red-bg); color: var(--ds-red); border: 1px solid transparent; }
.ds-btn-danger:hover  { border-color: var(--ds-red); }
.ds-btn-ghost     { background: transparent; color: var(--ds-text-secondary); border: 1px solid var(--ds-border); }
.ds-btn-ghost:hover   { color: var(--ds-text-primary); border-color: var(--ds-text-muted); }

/* ============================================================
   Keyboard shortcut hints
   ============================================================ */
.kbd {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-family: var(--ds-font-mono);
  font-size: 10px;
  background: var(--ds-bg-input);
  color: var(--ds-text-muted);
  border: 1px solid var(--ds-border);
}