/* Unified Button System for AI Home Upgrades */

:root {
    --primary-color: #667eea;
    --primary-hover: #5a6fd8;
    --secondary-color: #6c757d;
    --secondary-hover: #5a6268;
    --success-color: #28a745;
    --success-hover: #218838;
    --danger-color: #dc3545;
    --danger-hover: #c82333;
    --warning-color: #ffc107;
    --warning-hover: #e0a800;
    --info-color: #17a2b8;
    --info-hover: #138496;
    --light-color: #f8f9fa;
    --light-hover: #e9ecef;
    --dark-color: #343a40;
    --dark-hover: #23272b;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 25px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

/* Base Button Styles */
.btn-unified {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    transition: var(--transition);
    white-space: nowrap;
    box-shadow: var(--shadow);
}

.btn-unified:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.25);
}

.btn-unified:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    box-shadow: none;
}

/* Button Sizes */
.btn-unified.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: calc(var(--border-radius) - 2px);
}

.btn-unified.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    border-radius: var(--border-radius-lg);
}

.btn-unified.btn-xl {
    padding: 1.25rem 2.5rem;
    font-size: 1.25rem;
    border-radius: var(--border-radius-xl);
}

/* Primary Button */
.btn-unified.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #764ba2 100%);
    border-color: var(--primary-color);
    color: white;
}

.btn-unified.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-hover) 0%, #6a4190 100%);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: white;
}

/* Secondary Button */
.btn-unified.btn-secondary {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    color: white;
}

.btn-unified.btn-secondary:hover:not(:disabled) {
    background: var(--secondary-hover);
    border-color: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: white;
}

/* Success Button */
.btn-unified.btn-success {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.btn-unified.btn-success:hover:not(:disabled) {
    background: var(--success-hover);
    border-color: var(--success-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: white;
}

/* Danger Button */
.btn-unified.btn-danger {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border-color: #f093fb;
    color: white;
}

.btn-unified.btn-danger:hover:not(:disabled) {
    background: linear-gradient(135deg, #ed7ef0 0%, #f3455a 100%);
    border-color: #ed7ef0;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: white;
}

/* Warning Button */
.btn-unified.btn-warning {
    background: var(--warning-color);
    border-color: var(--warning-color);
    color: #212529;
}

.btn-unified.btn-warning:hover:not(:disabled) {
    background: var(--warning-hover);
    border-color: var(--warning-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: #212529;
}

/* Info Button */
.btn-unified.btn-info {
    background: var(--info-color);
    border-color: var(--info-color);
    color: white;
}

.btn-unified.btn-info:hover:not(:disabled) {
    background: var(--info-hover);
    border-color: var(--info-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: white;
}

/* Light Button */
.btn-unified.btn-light {
    background: var(--light-color);
    border-color: #dee2e6;
    color: #495057;
}

.btn-unified.btn-light:hover:not(:disabled) {
    background: var(--light-hover);
    border-color: #cbd3da;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: #495057;
}

/* Dark Button */
.btn-unified.btn-dark {
    background: var(--dark-color);
    border-color: var(--dark-color);
    color: white;
}

.btn-unified.btn-dark:hover:not(:disabled) {
    background: var(--dark-hover);
    border-color: var(--dark-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: white;
}

/* Outline Variants */
.btn-unified.btn-outline-primary {
    background: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-unified.btn-outline-primary:hover:not(:disabled) {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-unified.btn-outline-secondary {
    background: transparent;
    border-color: #e2e8f0;
    color: var(--secondary-color);
}

.btn-unified.btn-outline-secondary:hover:not(:disabled) {
    background: #f8f9fa;
    border-color: #dee2e6;
    color: #495057;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-unified.btn-outline-success {
    background: transparent;
    border-color: var(--success-color);
    color: var(--success-color);
}

.btn-unified.btn-outline-success:hover:not(:disabled) {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-unified.btn-outline-danger {
    background: transparent;
    border-color: var(--danger-color);
    color: var(--danger-color);
}

.btn-unified.btn-outline-danger:hover:not(:disabled) {
    background: var(--danger-color);
    border-color: var(--danger-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* Special Buttons */
.btn-unified.btn-icon-only {
    padding: 0.75rem;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
}

.btn-unified.btn-icon-only.btn-sm {
    padding: 0.5rem;
    width: 2.5rem;
    height: 2.5rem;
}

.btn-unified.btn-icon-only.btn-lg {
    padding: 1rem;
    width: 3.5rem;
    height: 3.5rem;
}

/* Full Width */
.btn-unified.btn-full {
    width: 100%;
}

/* Rounded Variants */
.btn-unified.btn-rounded {
    border-radius: var(--border-radius-xl);
}

.btn-unified.btn-rounded.btn-sm {
    border-radius: calc(var(--border-radius-xl) - 5px);
}

.btn-unified.btn-rounded.btn-lg {
    border-radius: calc(var(--border-radius-xl) + 5px);
}

/* Floating Action Button */
.btn-unified.btn-fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    padding: 0;
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.btn-unified.btn-fab:hover:not(:disabled) {
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* Loading State */
.btn-unified.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-unified.btn-loading::after {
    content: "";
    position: absolute;
    width: 1rem;
    height: 1rem;
    top: 50%;
    left: 50%;
    margin-left: -0.5rem;
    margin-top: -0.5rem;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .btn-unified {
        padding: 0.875rem 1.25rem;
        font-size: 0.95rem;
    }
    
    .btn-unified.btn-sm {
        padding: 0.625rem 1rem;
        font-size: 0.8rem;
    }
    
    .btn-unified.btn-lg {
        padding: 1.125rem 1.75rem;
        font-size: 1.05rem;
    }
    
    .btn-unified.btn-fab {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 3.5rem;
        height: 3.5rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    .btn-unified {
        transition: none;
    }
    
    .btn-unified:hover:not(:disabled) {
        transform: none;
    }
    
    .btn-unified.btn-loading::after {
        animation: none;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .btn-unified {
        border-width: 3px;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .btn-unified.btn-outline-secondary {
        border-color: #495057;
        color: #adb5bd;
    }
    
    .btn-unified.btn-outline-secondary:hover:not(:disabled) {
        background: #495057;
        border-color: #495057;
        color: #fff;
    }
}