/* Button Components for FlickMate V2 */
/* Modern, accessible button styles with consistent variants */

/* Base button styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--button-padding-y) var(--button-padding-x);
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    font-weight: var(--button-font-weight);
    line-height: var(--line-height-snug);
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    border-radius: var(--button-border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    
    /* Prevent text selection on buttons */
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

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

.btn:focus:not(:focus-visible) {
    outline: none;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Button variants */
.btn--primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-primary-contrast);
}

.btn--primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn--secondary {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: var(--color-secondary-contrast);
}

.btn--secondary:hover:not(:disabled) {
    background-color: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background-color: transparent;
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.btn--outline:hover:not(:disabled) {
    background-color: var(--color-surface);
    border-color: var(--color-border-light);
    color: var(--color-text-primary);
}

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

.btn--outline-primary:hover:not(:disabled) {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-primary-contrast);
}

.btn--ghost {
    background-color: transparent;
    border-color: transparent;
    color: var(--color-text-primary);
}

.btn--ghost:hover:not(:disabled) {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
}

.btn--danger {
    background-color: var(--color-error);
    border-color: var(--color-error);
    color: #ffffff;
}

.btn--danger:hover:not(:disabled) {
    background-color: var(--color-error-dark);
    border-color: var(--color-error-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--success {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: #ffffff;
}

.btn--success:hover:not(:disabled) {
    background-color: var(--color-success-dark);
    border-color: var(--color-success-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--warning {
    background-color: var(--color-warning);
    border-color: var(--color-warning);
    color: #ffffff;
}

.btn--warning:hover:not(:disabled) {
    background-color: var(--color-warning-dark);
    border-color: var(--color-warning-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Button sizes */
.btn--xs {
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
    border-radius: var(--border-radius-sm);
}

.btn--sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-base);
}

.btn--lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-lg);
    border-radius: var(--border-radius-lg);
}

.btn--xl {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xl);
    border-radius: var(--border-radius-xl);
}

/* Button modifiers */
.btn--block {
    display: flex;
    width: 100%;
}

.btn--rounded {
    border-radius: var(--border-radius-full);
}

.btn--square {
    border-radius: 0;
}

.btn--icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    justify-content: center;
}

.btn--icon.btn--sm {
    width: 2rem;
    height: 2rem;
}

.btn--icon.btn--lg {
    width: 3rem;
    height: 3rem;
}

.btn--icon.btn--xl {
    width: 3.5rem;
    height: 3.5rem;
}

/* Mobile touch target compliance */
@media (max-width: 768px) {
    .btn--icon {
        min-width: 44px;
        min-height: 44px;
        width: 44px;
        height: 44px;
    }
    
    .btn--icon.btn--sm {
        min-width: 40px;
        min-height: 40px;
        width: 40px;
        height: 40px;
    }
    
    /* Ensure all interactive elements meet touch requirements */
    .btn {
        min-height: 44px;
        touch-action: manipulation; /* Prevent double-tap zoom */
    }
}

/* Loading state */
.btn--loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn--loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1rem;
    height: 1rem;
    margin: -0.5rem 0 0 -0.5rem;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: btn-spin 0.8s linear infinite;
}

.btn--loading.btn--sm::after {
    width: 0.875rem;
    height: 0.875rem;
    margin: -0.4375rem 0 0 -0.4375rem;
}

.btn--loading.btn--lg::after {
    width: 1.25rem;
    height: 1.25rem;
    margin: -0.625rem 0 0 -0.625rem;
}

@keyframes btn-spin {
    to {
        transform: rotate(360deg);
    }
}

/* Button groups */
.btn-group {
    display: inline-flex;
    vertical-align: middle;
}

.btn-group > .btn {
    position: relative;
    flex: 0 1 auto;
}

.btn-group > .btn:not(:first-child) {
    margin-left: -1px;
}

.btn-group > .btn:not(:last-child):not(.dropdown-toggle) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.btn-group > .btn:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.btn-group > .btn:hover,
.btn-group > .btn:focus,
.btn-group > .btn:active {
    z-index: 1;
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 3.5rem;
    height: 3.5rem;
    background-color: var(--color-primary);
    color: var(--color-primary-contrast);
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: var(--z-fixed);
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.fab:active {
    transform: scale(1.05);
}

.fab--mini {
    width: 2.5rem;
    height: 2.5rem;
    bottom: var(--space-4);
    right: var(--space-4);
}

.fab--extended {
    width: auto;
    padding: 0 var(--space-4);
    border-radius: var(--border-radius-full);
    gap: var(--space-2);
}

/* Special button styles for media controls */
.btn--play {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border: none;
    color: white;
    position: relative;
    overflow: hidden;
}

.btn--play::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn--play:hover::before {
    left: 100%;
}

.btn--rating {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

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

.btn--rating.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-primary-contrast);
}

/* Toggle buttons */
.btn--toggle {
    position: relative;
}

.btn--toggle.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-primary-contrast);
}

.btn--toggle.active::after {
    content: '✓';
    position: absolute;
    top: -0.25rem;
    right: -0.25rem;
    width: 1rem;
    height: 1rem;
    background-color: var(--color-success);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }
    
    .btn:hover {
        transform: none;
    }
    
    .fab:hover {
        transform: none;
    }
    
    .btn--loading::after {
        animation: none;
    }
}

/* High contrast theme adjustments */
[data-theme="high-contrast"] .btn {
    border-width: 2px;
    font-weight: var(--font-weight-bold);
}

[data-theme="high-contrast"] .btn:focus {
    outline-width: 3px;
}

/* Print styles */
@media print {
    .btn {
        background: none !important;
        color: #000 !important;
        border: 1px solid #000 !important;
        box-shadow: none !important;
        text-decoration: none !important;
    }
    
    .fab {
        display: none !important;
    }
}

/* Dark theme specific adjustments */
[data-theme="dark"] .btn--outline {
    border-color: var(--color-border-light);
}

[data-theme="dark"] .btn--ghost:hover {
    background-color: var(--color-surface-secondary);
}

/* Light theme specific adjustments */
[data-theme="light"] .btn {
    box-shadow: var(--shadow-sm);
}

[data-theme="light"] .btn:hover {
    box-shadow: var(--shadow-md);
}

[data-theme="light"] .fab {
    box-shadow: var(--shadow-xl);
}