/* Theme Variables and Color Schemes */
:root {
    /* Primary Colors - Light Blue */
    --primary-color: #87ceeb;
    --primary-rgb: 135, 206, 235;
    --primary-hover: #5fb3d4;
    --primary-light: #b0e0e6;
    
    /* Secondary Colors - Teal/Dark Green */
    --secondary-color: #20b2aa;
    --secondary-dark: #008b8b;
    
    /* Neutral Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --text-white: #ffffff;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #1e293b;
    --bg-gradient: linear-gradient(135deg, #87ceeb 0%, #20b2aa 100%);
    
    /* Border Colors */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    
    /* Success/Error Colors */
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Shadow Colors */
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.2);
    --shadow-dark: rgba(0, 0, 0, 0.3);
    
    /* Card Colors */
    --card-bg: rgba(135, 206, 235, 0.1);
    --card-bg-hover: rgba(135, 206, 235, 0.2);
    --card-border: rgba(135, 206, 235, 0.2);
    --card-shadow: rgba(0, 0, 0, 0.1);
    --card-shadow-hover: rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    
    /* Typography */
    --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;
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-dark: #334155;
    
    --border-light: #334155;
    --border-medium: #475569;
    
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.5);
    --shadow-dark: rgba(0, 0, 0, 0.7);
}

/* Theme Utility Classes */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-light { color: var(--text-light); }
.text-white { color: var(--text-white); }

.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-dark { background-color: var(--bg-dark); }
.bg-gradient { background: var(--bg-gradient); }

.border-light { border-color: var(--border-light); }
.border-medium { border-color: var(--border-medium); }

.shadow-sm { box-shadow: 0 1px 2px var(--shadow-light); }
.shadow-md { box-shadow: 0 4px 6px var(--shadow-light); }
.shadow-lg { box-shadow: 0 10px 15px var(--shadow-light); }
.shadow-xl { box-shadow: 0 20px 25px var(--shadow-medium); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }

/* Component Themes */
.btn-theme-primary {
    background-color: var(--primary-color);
    color: var(--text-white);
    border: 1px solid var(--primary-color);
}

.btn-theme-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-theme-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-theme-secondary:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.card-theme {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px var(--shadow-light);
}

.navbar-theme {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 2px 20px var(--shadow-light);
}

/* Animation Themes */
.hover-lift {
    transition: transform var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-5px);
}

.hover-scale {
    transition: transform var(--transition-normal);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.fade-in {
    animation: fadeIn var(--transition-slow) ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp var(--transition-slow) ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}