/**
 * Pitagen Modern Design System
 * Soothing, eye-friendly colors using Slate & Zinc tones.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* ========== Colors (Eye-soothing Palette) ========== */
  
  /* Primary - Softer Coral/Red */
  --color-primary: #E15B5D; 
  --color-primary-hover: #C94C4E;
  --color-primary-light: rgba(225, 91, 93, 0.1);

  /* Secondary - Soft Blue */
  --color-secondary: #3B82F6;
  --color-secondary-hover: #2563EB;
  --color-secondary-light: rgba(59, 130, 246, 0.1);

  /* Semantic Colors - Pastel versions */
  --color-success: #10B981;
  --color-success-light: #ECFDF5;
  --color-success-border: #A7F3D0;

  --color-warning: #F59E0B;
  --color-warning-light: #FFFBEB;
  --color-warning-border: #FCD34D;

  --color-error: #EF4444;
  --color-error-light: #FEF2F2;
  --color-error-border: #FECACA;

  --color-info: #0EA5E9;
  --color-info-light: #F0F9FF;
  --color-info-border: #BAE6FD;

  /* Neutral Colors (Slate) - Crucial for eye strain */
  --color-bg: #F1F5F9;         /* Very soft slate instead of stark white/blue */
  --color-bg-card: #FFFFFF;    /* Pure white for cards, but bordered */
  --color-bg-hover: #F8FAFC;
  --color-bg-active: #E2E8F0;

  --color-text: #334155;       /* Softer than pitch black */
  --color-text-secondary: #64748B;
  --color-text-muted: #94A3B8;
  --color-text-light: #CBD5E1;

  /* Borders */
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  --color-border-focus: #93C5FD;

  /* Sidebar - Sleek Dark Slate */
  --color-sidebar: #0F172A;
  --color-sidebar-secondary: #1E293B;
  --color-sidebar-text: #CBD5E1;
  --color-sidebar-hover: #334155;
  --color-sidebar-active: #E15B5D;

  /* ========== Spacing ========== */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;

  /* ========== Border Radius ========== */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* ========== Typography ========== */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;

  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 22px;
  --font-size-3xl: 28px;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;

  /* ========== Shadows (Soft & Multi-layered) ========== */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -1px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.05), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.05), 0 10px 10px -5px rgba(15, 23, 42, 0.02);

  /* ========== Transitions ========== */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* ========== Z-Index ========== */
  --z-dropdown: 40;
  --z-sticky: 50;
  --z-modal-backdrop: 100;
  --z-modal: 101;
  --z-toast: 200;
}

/* Optional Dark Mode Base (for future toggle) */
@media (prefers-color-scheme: dark) {
  :root.auto-dark {
    --color-bg: #0F172A;
    --color-bg-card: #1E293B;
    --color-text: #F1F5F9;
    --color-text-secondary: #94A3B8;
    --color-text-muted: #64748B;
    --color-border: #334155;
    --color-border-light: #1E293B;
  }
}