/* ===========================
   MTS SAAS - DESIGN SYSTEM
   Flat Industrial Minimal Style
   =========================== */

/* ===========================
   COLOR PALETTE
   =========================== */
:root {
    /* Primary Colors */
    --color-primary: #0B243E;           /* Primary - Dark Navy Blue */
    --color-primary-light: #1a3a5f;     /* Primary Light */
    --color-primary-dark: #061322;      /* Primary Dark */
    
    /* Secondary Colors */
    --color-secondary: #C0C0C0;         /* Secondary - Silver Gray */
    --color-secondary-light: #d4d4d4;   /* Secondary Light */
    --color-secondary-dark: #a8a8a8;    /* Secondary Dark */
    
    /* Action Colors */
    --color-action: #B22222;            /* Action - Firebrick Red */
    --color-action-hover: #8B1A1A;      /* Action Hover */
    --color-action-active: #6B1414;     /* Action Active */
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-gray-50: #F8F9FA;
    --color-gray-100: #E9ECEF;
    --color-gray-200: #DEE2E6;
    --color-gray-300: #CED4DA;
    --color-gray-400: #ADB5BD;
    --color-gray-500: #6C757D;
    --color-gray-600: #495057;
    --color-gray-700: #343A40;
    --color-gray-800: #212529;
    
    /* Semantic Colors */
    --color-success: #28A745;
    --color-warning: #FFC107;
    --color-danger: #DC3545;
    --color-info: #17A2B8;
    
    /* Text Colors */
    --text-primary: var(--color-primary);
    --text-secondary: var(--color-gray-600);
    --text-muted: var(--color-gray-500);
    --text-on-primary: var(--color-white);
    --text-on-action: var(--color-white);
    
    /* Background Colors */
    --bg-primary: var(--color-white);
    --bg-secondary: var(--color-gray-50);
    --bg-tertiary: var(--color-gray-100);
    --bg-dark: var(--color-primary);
}

/* ===========================
   TYPOGRAPHY
   =========================== */
:root {
    /* Font Families */
    --font-primary: 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
    
    /* Font Sizes */
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    
    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Line Heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
}

/* ===========================
   SPACING
   =========================== */
:root {
    --space-0: 0;
    --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 */
    --space-16: 4rem;      /* 64px */
    --space-20: 5rem;      /* 80px */
}

/* ===========================
   BORDERS & RADIUS
   =========================== */
:root {
    /* Border Radius - ALWAYS 0 for 90° corners */
    --radius-none: 0;
    --radius-sm: 0;
    --radius-md: 0;
    --radius-lg: 0;
    --radius-full: 0;
    
    /* Border Widths */
    --border-width-thin: 1px;
    --border-width-medium: 2px;
    --border-width-thick: 3px;
    
    /* Border Colors */
    --border-color-light: var(--color-gray-200);
    --border-color-medium: var(--color-secondary);
    --border-color-dark: var(--color-primary);
}

/* ===========================
   SHADOWS
   =========================== */
:root {
    /* Minimal flat shadows for industrial style */
    --shadow-none: none;
    --shadow-xs: 0 1px 2px 0 rgba(11, 36, 62, 0.05);
    --shadow-sm: 0 2px 4px 0 rgba(11, 36, 62, 0.1);
    --shadow-md: 0 4px 6px 0 rgba(11, 36, 62, 0.1);
    --shadow-lg: 0 6px 12px 0 rgba(11, 36, 62, 0.15);
    --shadow-xl: 0 10px 20px 0 rgba(11, 36, 62, 0.2);
}

/* ===========================
   Z-INDEX
   =========================== */
:root {
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ===========================
   TRANSITIONS
   =========================== */
:root {
    --transition-fast: 150ms;
    --transition-base: 250ms;
    --transition-slow: 350ms;
    --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================
   UTILITY CLASSES
   =========================== */

/* Border Radius Utilities - All 90° */
.rounded-none { border-radius: 0 !important; }
.rounded { border-radius: 0 !important; }
.rounded-sm { border-radius: 0 !important; }
.rounded-md { border-radius: 0 !important; }
.rounded-lg { border-radius: 0 !important; }
.rounded-full { border-radius: 0 !important; }

/* Primary Color Utilities */
.text-primary { color: var(--color-primary) !important; }
.bg-primary { background-color: var(--color-primary) !important; }
.border-primary { border-color: var(--color-primary) !important; }

/* Secondary Color Utilities */
.text-secondary { color: var(--color-secondary) !important; }
.bg-secondary { background-color: var(--color-secondary) !important; }
.border-secondary { border-color: var(--color-secondary) !important; }

/* Action Color Utilities */
.text-action { color: var(--color-action) !important; }
.bg-action { background-color: var(--color-action) !important; }
.border-action { border-color: var(--color-action) !important; }

/* Shadow Utilities */
.shadow-none { box-shadow: var(--shadow-none) !important; }
.shadow-xs { box-shadow: var(--shadow-xs) !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }