/**
 * Parli – Design Tokens (Duolingo Style)
 * The single source of truth for all visual values.
 */

:root {
  /* ============================================================
     COLORS – Duolingo Iconic Palette
     ============================================================ */

  /* Primary: Vibrant Duolingo Green */
  --color-primary: #58CC02;
  --color-primary-dark: #46A302;
  --color-primary-light: #79D700;
  --color-primary-xlight: #E5F9D5;
  --color-primary-shadow: #46A302;
  --color-primary-rgb: 88, 204, 2;

  /* Secondary: Feather Blue */
  --color-secondary: #1CB0F6;
  --color-secondary-dark: #1899D6;
  --color-secondary-light: #44C0F8;
  --color-secondary-xlight: #DDF4FF;
  --color-secondary-shadow: #1899D6;

  /* Success: Fresh Emerald / Green */
  --color-success: #58CC02;
  --color-success-dark: #46A302;
  --color-success-light: #79D700;
  --color-success-xlight: #E5F9D5;
  --color-success-shadow: #46A302;

  /* Warning / Gold: Rewards & Gems */
  --color-warning: #FFC800;
  --color-warning-dark: #E5B200;
  --color-warning-light: #FFD433;
  --color-warning-xlight: #FFF8D6;
  --color-warning-shadow: #E5B200;

  /* Error / Danger: Vibrant Red */
  --color-error: #FF4B4B;
  --color-error-dark: #EA2B2B;
  --color-error-light: #FF6E6E;
  --color-error-xlight: #FFDFDF;
  --color-error-shadow: #EA2B2B;

  /* XP / Achievements: Royal Purple */
  --color-xp: #CE82FF;
  --color-xp-dark: #A559D6;
  --color-xp-light: #D99BFF;
  --color-xp-xlight: #F6E5FF;
  --color-xp-shadow: #A559D6;

  /* Speaking: Vibrant Teal */
  --color-speaking: #00CD9C;
  --color-speaking-dark: #00A47E;
  --color-speaking-light: #2EE0B5;
  --color-speaking-xlight: #D5FAF2;
  --color-speaking-shadow: #00A47E;

  /* Streak: Fiery Orange */
  --color-streak: #FF9600;
  --color-streak-dark: #E58700;
  --color-streak-light: #FFAA33;
  --color-streak-xlight: #FFF0D6;
  --color-streak-shadow: #E58700;

  /* ============================================================
     NEUTRALS & CARD BACKGROUNDS
     ============================================================ */
  --color-neutral-50: #FFFFFF;
  --color-neutral-100: #F7F7F7;
  --color-neutral-150: #E5E5E5;
  --color-neutral-200: #CECECE;
  --color-neutral-300: #AFAFAF;
  --color-neutral-400: #888888;
  --color-neutral-500: #666666;
  --color-neutral-600: #4B4B4B;
  --color-neutral-700: #3C3C3C;
  --color-neutral-800: #202020;
  --color-neutral-900: #111111;

  --bg-base: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F7F7F7;
  --bg-overlay: rgba(32, 32, 32, 0.65);
  --bg-glass: rgba(255, 255, 255, 0.92);

  /* ============================================================
     TEXT
     ============================================================ */
  --text-primary: #3C3C3C;
  --text-secondary: #777777;
  --text-tertiary: #AFAFAF;
  --text-inverse: #FFFFFF;
  --text-on-primary: #FFFFFF;

  /* ============================================================
     BORDERS & RADIUS
     ============================================================ */
  --border-color: #E5E5E5;
  --border-color-strong: #CECECE;
  --border-width: 2px;
  
  --border-radius-xs: 8px;
  --border-radius-sm: 12px;
  --border-radius-md: 16px;
  --border-radius-lg: 20px;
  --border-radius-xl: 24px;
  --border-radius-full: 9999px;

  /* ============================================================
     SHADOWS & 3D ELEVATION
     ============================================================ */
  --shadow-3d-btn: 0 4px 0 var(--color-primary-shadow);
  --shadow-xs: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 4px 0 #E5E5E5;
  --shadow-md: 0 6px 0 #E5E5E5, 0 10px 20px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 8px 0 #E5E5E5, 0 16px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.16);

  /* ============================================================
     TYPOGRAPHY
     ============================================================ */
  --font-display: 'Nunito', system-ui, -apple-system, sans-serif;
  --font-body: 'Nunito', system-ui, -apple-system, sans-serif;

  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-md: 1.125rem;    /* 18px */
  --text-lg: 1.25rem;     /* 20px */
  --text-xl: 1.5rem;      /* 24px */
  --text-2xl: 1.875rem;   /* 30px */
  --text-3xl: 2.25rem;    /* 36px */
  --text-4xl: 3rem;       /* 48px */

  --weight-regular: 500;
  --weight-medium: 600;
  --weight-semibold: 700;
  --weight-bold: 800;
  --weight-extrabold: 850;
  --weight-black: 900;

  --line-tight: 1.2;
  --line-snug: 1.35;
  --line-base: 1.5;
  --line-relaxed: 1.7;

  /* ============================================================
     SPACING & LAYOUT
     ============================================================ */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */

  --page-padding: var(--space-4);

  --duration-fast: 120ms;
  --duration-base: 200ms;
  --duration-slow: 300ms;

  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-bounce: cubic-bezier(0.34, 1.8, 0.64, 1);

  --nav-height: 76px;
  --header-height: 64px;
  --content-max-width: 500px;

  --z-below: -1;
  --z-base: 0;
  --z-raised: 10;
  --z-overlay: 100;
  --z-modal: 200;
  --z-toast: 300;
  --z-confetti: 400;
  --z-loading: 500;
}