/* ========== UNIVERSAL BOOKS - REUSABLE COMPONENTS ========== */
/* Unified component styles for consistent UI across the application */

/* ========== BADGE COMPONENT ========== */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    text-align: center;
}

.badge-primary {
    background: var(--primary-color);
    color: white;
}

.badge-success {
    background: var(--success-color);
    color: white;
}

.badge-warning {
    background: var(--warning-color);
    color: white;
}

.badge-error {
    background: var(--error-color);
    color: white;
}

.badge-secondary {
    background: var(--text-secondary);
    color: white;
}

.badge-info {
    background: var(--info-color);
    color: white;
}

.badge-outline {
    background: transparent;
    border: 1px solid currentColor;
}

/* ========== LOADING SPINNER ========== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-sm {
    width: 24px;
    height: 24px;
    border-width: 2px;
}

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 4px;
}

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

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl);
    gap: var(--spacing-lg);
}

.loading-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ========== EMPTY STATE ========== */
.empty-state {
    text-align: center;
    padding: var(--spacing-4xl) var(--spacing-xl);
    background: var(--background-light);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--border-color);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
    color: var(--text-secondary);
}

.empty-state-icon svg {
    width: 64px;
    height: 64px;
    stroke: var(--text-secondary);
}

.empty-state-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.empty-state-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.empty-state-action {
    margin-top: var(--spacing-lg);
}

/* ========== TOAST NOTIFICATIONS ========== */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    min-width: 180px;
    max-width: 280px;
    width: auto;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 12px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 10000;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
    border-left: 4px solid var(--primary-color);
    font-size: 0.875rem;
    line-height: 1.4;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-success {
    border-left-color: var(--success-color);
    background: #f0fdf4;
}

.toast-error {
    border-left-color: var(--error-color);
    background: #fef2f2;
}

.toast-warning {
    border-left-color: var(--warning-color);
    background: #fffbeb;
}

.toast-info {
    border-left-color: var(--info-color);
    background: #eff6ff;
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.toast-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.toast-close {
    flex-shrink: 0;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-primary);
}

/* ========== ALERT COMPONENT ========== */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: start;
    gap: var(--spacing-md);
}

.alert-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.alert-message {
    font-size: 0.875rem;
}

.alert-info {
    border-color: var(--info-color);
    background: #eff6ff;
    color: #1e40af;
}

.alert-success {
    border-color: var(--success-color);
    background: #f0fdf4;
    color: #166534;
}

.alert-warning {
    border-color: var(--warning-color);
    background: #fffbeb;
    color: #92400e;
}

.alert-error {
    border-color: var(--error-color);
    background: #fef2f2;
    color: #991b1b;
}

/* ========== CHIP/TAG COMPONENT ========== */
.chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    cursor: default;
}

.chip-clickable {
    cursor: pointer;
}

.chip-clickable:hover {
    background: var(--background-dark);
    border-color: var(--primary-color);
}

.chip-primary {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.chip-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success-color);
    color: var(--success-color);
}

.chip-removable {
    padding-right: var(--spacing-sm);
}

.chip-remove {
    background: none;
    border: none;
    padding: 0;
    margin-left: var(--spacing-xs);
    cursor: pointer;
    color: currentColor;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.chip-remove:hover {
    opacity: 1;
}

/* ========== MODAL COMPONENT ========== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
    padding: 20px;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    padding: 24px;
    width: 90%;
    max-width: 480px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
    animation: slideUp 0.3s ease;
}

.modal-sm .modal-content {
    max-width: 400px;
}

.modal-lg .modal-content {
    max-width: 800px;
}

.modal-xl .modal-content {
    max-width: 1200px;
}

.modal-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 32px;
    height: 32px;
    border: none;
    background: var(--background-light);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.modal-close:hover {
    background: var(--error-color);
    color: white;
    transform: rotate(90deg);
}

.modal-body {
    margin-bottom: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

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

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ========== DROPDOWN COMPONENT ========== */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropdown-toggle:hover {
    border-color: var(--primary-color);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    min-width: 200px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1000;
    max-height: 300px;
    overflow-y: auto;
}

.dropdown.active .dropdown-menu,
.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.dropdown-item:hover {
    background: var(--background-light);
    color: var(--primary-color);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-xs) 0;
}

/* ========== TOOLTIP COMPONENT ========== */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-content {
    position: absolute;
    bottom: calc(100% + 0.5rem);
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 10000;
    pointer-events: none;
}

.tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--text-primary);
}

.tooltip:hover .tooltip-content {
    opacity: 1;
    visibility: visible;
}

.tooltip-top .tooltip-content {
    bottom: calc(100% + 0.5rem);
    top: auto;
}

.tooltip-bottom .tooltip-content {
    top: calc(100% + 0.5rem);
    bottom: auto;
}

.tooltip-bottom .tooltip-content::after {
    top: auto;
    bottom: 100%;
    border-top-color: transparent;
    border-bottom-color: var(--text-primary);
}

/* ========== SKELETON LOADERS ========== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--background-light) 25%,
        var(--background-dark) 50%,
        var(--background-light) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--spacing-sm);
}

.skeleton-text-sm {
    height: 0.75rem;
}

.skeleton-text-lg {
    height: 1.25rem;
}

.skeleton-title {
    height: 2rem;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-card {
    height: 200px;
    border-radius: var(--radius-lg);
}

.skeleton-image {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-md);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .toast {
        left: 16px;
        right: 16px;
        min-width: auto;
        max-width: calc(100vw - 32px);
        bottom: 16px;
        font-size: 0.8125rem;
    }
    
    .modal-content {
        width: 95%;
        padding: var(--spacing-lg);
        max-height: 90vh;
        overflow-y: auto;
    }
    
    /* Better close button positioning */
    .modal-close {
        position: sticky;
        top: var(--spacing-md);
        right: var(--spacing-md);
        z-index: 10;
    }
    
    .dropdown-menu {
        min-width: 150px;
    }
}

/* Safe area support for notched devices */
@supports (padding: env(safe-area-inset-bottom)) {
    .toast {
        bottom: calc(1rem + env(safe-area-inset-bottom));
    }
}