/**
 * Global Studies - Brand Design System
 * =====================================
 * This file contains all brand colors, typography, and reusable components.
 * To change the site-wide color scheme, update the CSS custom properties below.
 * 
 * Usage: All templates should use these CSS classes and variables for consistency.
 */

/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
    /* -------------------------------------------------------------------------
       Primary Brand Color
       Change these values to update the primary color across the entire site
       ------------------------------------------------------------------------- */
    --color-primary: #2563eb;           /* Main brand color (blue-600) */
    --color-primary-hover: #1d4ed8;     /* Hover state (blue-700) */
    --color-primary-light: #3b82f6;     /* Light variant (blue-500) */
    --color-primary-dark: #1e40af;      /* Dark variant (blue-800) */
    --color-primary-50: #eff6ff;        /* Lightest tint */
    --color-primary-100: #dbeafe;       /* Very light tint */
    
    /* -------------------------------------------------------------------------
       Secondary Brand Color (Purple accents)
       ------------------------------------------------------------------------- */
    --color-secondary: #9333ea;         /* Secondary color (purple-600) */
    --color-secondary-hover: #7c3aed;   /* Hover state (purple-700) */
    --color-secondary-light: #a855f7;   /* Light variant (purple-500) */
    --color-secondary-dark: #6b21a8;    /* Dark variant (purple-800) */
    
    /* -------------------------------------------------------------------------
       Accent Color (Success/Highlight)
       ------------------------------------------------------------------------- */
    --color-accent: #10b981;            /* Accent color (emerald-500) */
    --color-accent-hover: #059669;      /* Hover state (emerald-600) */
    
    /* -------------------------------------------------------------------------
       Neutral Colors
       ------------------------------------------------------------------------- */
    --color-text-primary: #111827;      /* Main text (gray-900) */
    --color-text-secondary: #4b5563;    /* Secondary text (gray-600) */
    --color-text-muted: #9ca3af;        /* Muted text (gray-400) */
    --color-background: #ffffff;        /* Main background */
    --color-surface: #f9fafb;           /* Surface/card background (gray-50) */
    --color-border: #e5e7eb;            /* Border color (gray-200) */
    
    /* -------------------------------------------------------------------------
       Button Tokens
       ------------------------------------------------------------------------- */
    --btn-primary-bg: var(--color-primary);
    --btn-primary-hover: var(--color-primary-hover);
    --btn-primary-text: #ffffff;
    --btn-primary-shadow: rgba(37, 99, 235, 0.35);
    
    --btn-secondary-bg: var(--color-secondary);
    --btn-secondary-hover: var(--color-secondary-hover);
    --btn-secondary-text: #ffffff;
    
    /* -------------------------------------------------------------------------
       Spacing & Sizing
       ------------------------------------------------------------------------- */
    --border-radius-sm: 0.375rem;       /* 6px */
    --border-radius-md: 0.5rem;         /* 8px */
    --border-radius-lg: 0.75rem;        /* 12px */
    --border-radius-xl: 1rem;           /* 16px */
    
    /* -------------------------------------------------------------------------
       Transitions
       ------------------------------------------------------------------------- */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ==========================================================================
   Button Components
   ========================================================================== */

/**
 * Primary Button
 * Use: Main call-to-action buttons
 * Example: <a href="#" class="btn-primary">Click me</a>
 */
.btn-primary {
    background-color: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    box-shadow: 0 10px 15px -3px var(--btn-primary-shadow), 
                0 4px 6px -4px var(--btn-primary-shadow);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary:hover {
    background-color: var(--btn-primary-hover);
    transform: scale(1.05);
    color: var(--btn-primary-text);
}

.btn-primary:focus {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

.btn-primary:active {
    transform: scale(0.98);
}

/**
 * Secondary Button
 * Use: Secondary actions, less prominent CTAs
 */
.btn-secondary {
    background-color: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    box-shadow: 0 4px 6px -1px rgba(147, 51, 234, 0.25);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
}

.btn-secondary:hover {
    background-color: var(--btn-secondary-hover);
    transform: scale(1.05);
    color: var(--btn-secondary-text);
}

/**
 * Outline Button
 * Use: Tertiary actions, ghost buttons
 */
.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: #ffffff;
    transform: scale(1.05);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

/* Text colors using brand palette */
.text-primary { color: var(--color-primary) !important; }
.text-secondary { color: var(--color-secondary) !important; }
.text-accent { color: var(--color-accent) !important; }

/* Background colors using brand palette */
.bg-primary { background-color: var(--color-primary) !important; }
.bg-secondary { background-color: var(--color-secondary) !important; }
.bg-accent { background-color: var(--color-accent) !important; }

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

@media (max-width: 640px) {
    .btn-primary,
    .btn-secondary,
    .btn-outline {
        padding: 0.75rem 1.5rem;
        font-size: 0.9375rem;
    }
}

/* ==========================================================================
   Reduced Motion Support
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .btn-primary,
    .btn-secondary,
    .btn-outline {
        transition: none;
    }
    
    .btn-primary:hover,
    .btn-secondary:hover,
    .btn-outline:hover {
        transform: none;
    }
}