/* CSS Variables - Dark Theme */
:root {
    /* Colors - BIOBRIDGE Brand Colors */
    --color-primary: #c2a369;        /* Gold RAL 1036 */
    --color-secondary: #d4b77d;      /* Lighter Gold variation */
    --color-accent: #a88f57;         /* Darker Gold variation */

    --color-bg-primary: #0E3B2E;     /* Dark Green RAL 6005 */
    --color-bg-secondary: #0d3429;   /* Slightly darker green */
    --color-bg-tertiary: #1a4a3a;    /* Lighter green */

    --color-text-primary: #FFFFFF;   /* Pure White */
    --color-text-secondary: #E5E5E5; /* Light Gray */
    --color-text-muted: #999999;     /* Medium Gray */

    --color-border: #333333;         /* Dark Border */
    --color-border-light: #444444;   /* Lighter Border */

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7);

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Layout */
    --max-width: 1200px;
    --header-height: 70px;
}