/**
 * =============================================
 * Core Buttons CSS
 * /core/assets/css/buttons.css
 * =============================================
 * 
 * All button styles for public-facing sites:
 * - Primary, secondary, success, danger, warning, info buttons
 * - Outline variants
 * - Button sizes
 * - Button states
 * - Icon buttons
 * - Button groups
 */

/* ==============================================
   BASE BUTTON STYLES
   ============================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 10px 20px;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-family);
    user-select: none;
}

.btn:focus {
    outline: 2px solid transparent;
    outline-offset: 2px;
}

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

.btn:active {
    transform: translateY(0);
}

.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ==============================================
   BUTTON VARIANTS - SOLID
   ============================================== */

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(14, 165, 233, 0.3);
}

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

.btn-secondary:hover {
    background: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(20, 184, 166, 0.3);
}

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

.btn-success:hover {
    background: #059669;
    border-color: #059669;
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
}

/* Danger Button */
.btn-danger {
    background: var(--error-color);
    color: var(--white);
    border-color: var(--error-color);
}

.btn-danger:hover {
    background: #dc2626;
    border-color: #dc2626;
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
}

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

.btn-warning:hover {
    background: #d97706;
    border-color: #d97706;
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(245, 158, 11, 0.3);
}

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

.btn-info:hover {
    background: #2563eb;
    border-color: #2563eb;
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
}

/* Accent Button */
.btn-accent {
    background: var(--accent-color);
    color: var(--white);
    border-color: var(--accent-color);
}

.btn-accent:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(139, 92, 246, 0.3);
}

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

.btn-dark:hover {
    background: var(--black);
    border-color: var(--black);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

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

.btn-light:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-dark);
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* ==============================================
   BUTTON VARIANTS - OUTLINE
   ============================================== */
.btn-outline {
    background: transparent;
    border-width: 2px;
}

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

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: var(--white);
}

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

.btn-outline-secondary:hover {
    background: var(--secondary-color);
    color: var(--white);
}

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

.btn-outline-success:hover {
    background: var(--success-color);
    color: var(--white);
}

.btn-outline-danger {
    color: var(--error-color);
    border-color: var(--error-color);
}

.btn-outline-danger:hover {
    background: var(--error-color);
    color: var(--white);
}

.btn-outline-warning {
    color: var(--warning-color);
    border-color: var(--warning-color);
}

.btn-outline-warning:hover {
    background: var(--warning-color);
    color: var(--white);
}

.btn-outline-info {
    color: var(--info-color);
    border-color: var(--info-color);
}

.btn-outline-info:hover {
    background: var(--info-color);
    color: var(--white);
}

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

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

/* ==============================================
   BUTTON VARIANTS - GHOST (NO BORDER)
   ============================================== */
.btn-ghost {
    background: transparent;
    border-color: transparent;
}

.btn-ghost-primary {
    color: var(--primary-color);
}

.btn-ghost-primary:hover {
    background: rgba(14, 165, 233, 0.1);
}

.btn-ghost-secondary {
    color: var(--secondary-color);
}

.btn-ghost-secondary:hover {
    background: rgba(20, 184, 166, 0.1);
}

.btn-ghost-danger {
    color: var(--error-color);
}

.btn-ghost-danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* ==============================================
   BUTTON VARIANTS - LINK STYLE
   ============================================== */
.btn-link {
    background: transparent;
    border: none;
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    text-decoration: none;
}

.btn-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
    transform: none;
    box-shadow: none;
}

.btn-link:focus {
    outline: 1px dotted var(--primary-color);
}

/* ==============================================
   BUTTON SIZES
   ============================================== */

/* Extra Small */
.btn-xs {
    padding: 4px 12px;
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
}

/* Small */
.btn-sm {
    padding: 6px 16px;
    font-size: var(--font-size-sm);
}

/* Medium (Default) */
.btn-md {
    padding: 10px 20px;
    font-size: var(--font-size-base);
}

/* Large */
.btn-lg {
    padding: 12px 24px;
    font-size: var(--font-size-lg);
}

/* Extra Large */
.btn-xl {
    padding: 16px 32px;
    font-size: var(--font-size-xl);
    border-radius: var(--radius-lg);
}

/* ==============================================
   BUTTON SHAPES
   ============================================== */

/* Square (no padding on sides) */
.btn-square {
    padding: 10px;
    width: 40px;
    height: 40px;
}

.btn-square.btn-sm {
    width: 32px;
    height: 32px;
    padding: 8px;
}

.btn-square.btn-lg {
    width: 48px;
    height: 48px;
    padding: 12px;
}

/* Rounded (pill shape) */
.btn-rounded {
    border-radius: var(--radius-full);
}

/* Block (full width) */
.btn-block {
    display: flex;
    width: 100%;
}

/* ==============================================
   BUTTON ICONS
   ============================================== */
.btn svg,
.btn i {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn-sm svg,
.btn-sm i {
    width: 16px;
    height: 16px;
}

.btn-lg svg,
.btn-lg i {
    width: 20px;
    height: 20px;
}

/* Icon only buttons */
.btn-icon {
    padding: 10px;
    gap: 0;
}

.btn-icon svg,
.btn-icon i {
    width: 20px;
    height: 20px;
}

/* ==============================================
   BUTTON WITH LOADING STATE
   ============================================== */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    color: inherit;
}

.btn-loading.btn-primary::after,
.btn-loading.btn-secondary::after,
.btn-loading.btn-success::after,
.btn-loading.btn-danger::after,
.btn-loading.btn-warning::after,
.btn-loading.btn-info::after {
    border-color: rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
}

/* ==============================================
   BUTTON GROUPS
   ============================================== */
.btn-group {
    display: inline-flex;
    gap: var(--spacing-sm);
}

.btn-group .btn {
    margin: 0;
}

/* Attached button group (no gap) */
.btn-group-attached {
    display: inline-flex;
    gap: 0;
}

.btn-group-attached .btn {
    border-radius: 0;
    margin-left: -1px;
}

.btn-group-attached .btn:first-child {
    border-top-left-radius: var(--radius-md);
    border-bottom-left-radius: var(--radius-md);
    margin-left: 0;
}

.btn-group-attached .btn:last-child {
    border-top-right-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

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

/* Vertical button group */
.btn-group-vertical {
    display: inline-flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.btn-group-vertical.btn-group-attached {
    gap: 0;
}

.btn-group-vertical.btn-group-attached .btn {
    border-radius: 0;
    margin-top: -1px;
    margin-left: 0;
}

.btn-group-vertical.btn-group-attached .btn:first-child {
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
    margin-top: 0;
}

.btn-group-vertical.btn-group-attached .btn:last-child {
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

/* ==============================================
   SPECIAL BUTTON TYPES
   ============================================== */

/* Gradient buttons */
.btn-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    border: none;
}

.btn-gradient-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    color: var(--white);
}

.btn-gradient-accent {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    color: var(--white);
    border: none;
}

.btn-gradient-accent:hover {
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

/* Close button */
.btn-close {
    background: transparent;
    border: none;
    padding: var(--spacing-xs);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 24px;
    line-height: 1;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

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

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

/* ==============================================
   RESPONSIVE BUTTONS
   ============================================== */
@media (max-width: 768px) {
    .btn {
        padding: 9px 18px;
        font-size: var(--font-size-sm);
    }
    
    .btn-sm {
        padding: 6px 14px;
        font-size: var(--font-size-xs);
    }
    
    .btn-lg {
        padding: 11px 22px;
        font-size: var(--font-size-base);
    }
    
    .btn-xl {
        padding: 14px 28px;
        font-size: var(--font-size-lg);
    }
    
    /* Stack button groups on mobile */
    .btn-group-mobile-stack {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-group-mobile-stack .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 8px 16px;
    }
    
    .btn-sm {
        padding: 5px 12px;
    }
}

/* ==============================================
   PRINT STYLES
   ============================================== */
@media print {
    .btn {
        display: none;
    }
}