/**
 * OrchestCTR - Core Styles
 * CSS Variables, Reset, Base Styles
 *
 * Load Order: 1st (vor allen anderen CSS-Dateien)
 */

/* ========================================
   CSS Variables - Global Design Tokens
   ======================================== */

:root {
    /* Primary Colors */
    --color-primary-500: #3498db;
    --color-primary-600: #2980b9;

    /* Legacy Support (deprecated - use numbered variants) */
    --color-primary: var(--color-primary-500);
    --color-primary-hover: var(--color-primary-600);

    /* Text Colors */
    --color-text-900: #2c3e50;
    --color-text-700: #333;
    --color-text-500: #555;
    --color-text-400: #6c757d;

    /* Legacy Support */
    --color-text-dark: var(--color-text-900);
    --color-text: var(--color-text-700);
    --color-text-muted: var(--color-text-500);
    --color-text-light: var(--color-text-400);

    /* Success Colors */
    --color-success-500: #27ae60;
    --color-success-600: #229954;
    --color-success-bg: #d4edda;
    --color-success-text: #155724;
    --color-success-border: #c3e6cb;

    /* Legacy Support */
    --color-success: var(--color-success-500);
    --color-success-hover: var(--color-success-600);

    /* Danger/Error Colors */
    --color-danger-500: #e74c3c;
    --color-danger-600: #c0392b;
    --color-error-bg: #f8d7da;
    --color-error-text: #721c24;
    --color-error-border: #f5c6cb;

    /* Legacy Support */
    --color-danger: var(--color-danger-500);
    --color-danger-hover: var(--color-danger-600);

    /* Secondary Colors */
    --color-secondary-500: #95a5a6;
    --color-secondary-600: #7f8c8d;
    --color-secondary-bg: #ecf0f1;

    /* Background Colors */
    --color-bg-white: #ffffff;
    --color-bg-light: #f5f5f5;
    --color-bg-dark: #2c3e50;

    /* Border Colors */
    --color-border-light: #ddd;
    --color-border-medium: #ced4da;
    --color-border-dark: #adb5bd;

    /* Legacy Support */
    --color-border: var(--color-border-light);

    /* Shadows */
    --shadow-xs: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-sm: 0 2px 5px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 15px rgba(0,0,0,0.15);
    --shadow-xl: 0 8px 20px rgba(0,0,0,0.2);

    /* Spacing Scale */
    --space-0: 0;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 32px;
    --space-8: 40px;
    --space-9: 60px;
    --space-10: 80px;

    /* Border Radius */
    --radius-sm: 3px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --radius-2xl: 12px;
    --radius-full: 9999px;

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-family-mono: 'Courier New', Consolas, Monaco, monospace;

    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;

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

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 900;
    --z-modal: 1000;
    --z-tooltip: 1100;

    /* Breakpoints (for reference in media queries) */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
}

/* ========================================
   CSS Reset
   ======================================== */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ========================================
   Base Styles
   ======================================== */

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-md);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg-light);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--color-text-dark);
    margin-bottom: var(--space-3);
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

h5 {
    font-size: var(--font-size-md);
}

h6 {
    font-size: var(--font-size-base);
}

p {
    margin-bottom: var(--space-4);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-primary-hover);
}

a:visited {
    color: var(--color-primary);
}

code {
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    padding: 2px 6px;
    background-color: var(--color-bg-light);
    border-radius: var(--radius-sm);
    color: #d63384;
}

pre {
    font-family: var(--font-family-mono);
    background-color: var(--color-bg-light);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

/* Lists */
ul, ol {
    margin-bottom: var(--space-4);
    padding-left: var(--space-6);
}

li {
    margin-bottom: var(--space-2);
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Selection */
::selection {
    background-color: var(--color-primary);
    color: white;
}

::-moz-selection {
    background-color: var(--color-primary);
    color: white;
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Scrollbar Styling (Webkit) */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border-medium);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-dark);
}