/* CSS Variables - Dark Theme (Default) */
:root{
  --bg:#0f172a; --card:#1e293b; --card-hover:#263449; --ink:#f8fafc; --sub:#94a3b8;
  --acc:#3b82f6; --acc-hover:#2563eb; --br:#334155; --warn:#ef4444; --warn-hover:#dc2626;
  --success:#10b981; --info:#0ea5e9;
  --shadow-md:0 8px 25px -5px rgba(0,0,0,0.25),0 4px 10px -3px rgba(0,0,0,0.1);
  --shadow-lg:0 15px 35px -5px rgba(0,0,0,0.3),0 10px 20px -5px rgba(0,0,0,0.1);
  --shadow-xl:0 25px 50px -12px rgba(0,0,0,0.4);
  --radius:.8rem;
  --gradient-primary:linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --gradient-success:linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-warning:linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-danger:linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  
  /* Dark theme input styling */
  --text: #f8fafc;
  --muted: #94a3b8;
  --input-bg: rgba(255,255,255,.05);
  --input-border: #334155;
  --input-focus: #3b82f6;
  --placeholder: #64748b;
  
  /* Enhanced Typography & Spacing */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
}

/* Light Theme */
[data-theme="light"] {
  --bg:#f8fafc; --card:#ffffff; --card-hover:#f1f5f9; --ink:#0f172a; --sub:#475569;
  --acc:#3b82f6; --acc-hover:#2563eb; --br:#e2e8f0; --warn:#ef4444; --warn-hover:#dc2626;
  --success:#10b981; --info:#0ea5e9;
  --shadow-md:0 8px 25px -5px rgba(0,0,0,0.1),0 4px 10px -3px rgba(0,0,0,0.05);
  --shadow-lg:0 15px 35px -5px rgba(0,0,0,0.15),0 10px 20px -5px rgba(0,0,0,0.05);
  --shadow-xl:0 25px 50px -12px rgba(0,0,0,0.2);
  --radius:.8rem;
  --gradient-primary:linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --gradient-success:linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-warning:linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-danger:linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  
  /* Light theme specific overrides for better readability */
  --text: #0f172a;
  --muted: #64748b;
  --input-bg: #ffffff;
  --input-border: #d1d5db;
  --input-focus: #3b82f6;
  --placeholder: #9ca3af;
  --table-header: #f8fafc;
  --table-border: #e5e7eb;
  --table-row-hover: #f9fafb;
}