/**
 * AutoRetrofit - Button Components
 */

/* ===================================
   Base Button
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===================================
   Button Variants
   =================================== */

/* Primary Button */
.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-lg);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-border-light);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg-hover);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

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

/* Outline Button */
.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

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

/* Danger Button */
.btn-danger {
    background: linear-gradient(135deg, var(--color-error), var(--color-error-dark));
    color: var(--color-text-primary);
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(239, 68, 68, 0.3);
}

/* Success Button */
.btn-success {
    background: linear-gradient(135deg, var(--color-success), var(--color-success-dark));
    color: var(--color-text-primary);
}

/* ===================================
   Button Sizes
   =================================== */

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
}

.btn-lg {
    padding: var(--space-5) var(--space-10);
    font-size: var(--text-lg);
    border-radius: var(--radius-xl);
}

.btn-full {
    width: 100%;
}

/* ===================================
   Button Icon
   =================================== */

.btn-icon {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* Icon only button */
.btn-icon-only {
    padding: var(--space-3);
    border-radius: var(--radius-md);
}

.btn-icon-only .btn-icon {
    margin: 0;
}

.btn-icon-only:hover .btn-icon {
    transform: none;
}

/* ===================================
   Button Group
   =================================== */

.btn-group {
    display: inline-flex;
}

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

.btn-group .btn:first-child {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.btn-group .btn:not(:last-child) {
    border-right: none;
}

/* ===================================
   Loading State
   =================================== */

.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.btn-primary.btn-loading::after {
    border-color: var(--color-bg-primary);
    border-right-color: transparent;
}