/* ============================================
   NIXEL - Component Styles
   ============================================ */

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

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

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

.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
    box-shadow: var(--shadow-md);
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.btn-icon {
    padding: var(--spacing-3);
    border-radius: var(--radius-full);
}

.btn-icon-sm {
    padding: var(--spacing-2);
}

/* ============================================
   Cards
   ============================================ */

.card {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-interactive {
    cursor: pointer;
}

.card-interactive:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-2);
}

.card-body {
    margin-bottom: var(--spacing-4);
}

.card-footer {
    margin-top: var(--spacing-4);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--border-color);
}

/* ============================================
   Forms
   ============================================ */

.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-tertiary);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

.form-error {
    margin-top: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--error);
}

.form-help {
    margin-top: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}

/* ============================================
   Avatar
   ============================================ */

.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
    color: white;
    font-weight: var(--font-weight-semibold);
    flex-shrink: 0;
}

.avatar-xs {
    width: 24px;
    height: 24px;
    font-size: var(--font-size-xs);
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-sm);
}

.avatar-md {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-base);
}

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: var(--font-size-xl);
}

.avatar-xl {
    width: 96px;
    height: 96px;
    font-size: var(--font-size-3xl);
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ============================================
   Badge
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary {
    background-color: var(--primary-100);
    color: var(--primary-700);
}

[data-theme="dark"] .badge-primary {
    background-color: var(--primary-900);
    color: var(--primary-200);
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

[data-theme="dark"] .badge-success {
    background-color: #064e3b;
    color: #6ee7b7;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

[data-theme="dark"] .badge-warning {
    background-color: #78350f;
    color: #fcd34d;
}

.badge-error {
    background-color: #fee2e2;
    color: #991b1b;
}

[data-theme="dark"] .badge-error {
    background-color: #7f1d1d;
    color: #fca5a5;
}

/* ============================================
   Modal
   ============================================ */

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-overlay);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4);
    animation: fadeIn var(--transition-base);
}

.modal-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    background-color: rgba(0, 0, 0, 0.7) !important;
    z-index: 1000 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: var(--spacing-4);
    animation: fadeIn 0.2s ease-in-out;
}

.modal {
    background-color: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: fadeIn var(--transition-slow);
    position: relative;
}

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

.modal-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin: 0;
}

.modal-body {
    padding: var(--spacing-6);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-6);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-3);
    justify-content: flex-end;
}

/* ============================================
   Dropdown
   ============================================ */

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-2);
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: var(--z-dropdown);
    animation: fadeIn var(--transition-fast);
    overflow: hidden;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color var(--transition-fast);
    cursor: pointer;
}

.dropdown-item:hover {
    background-color: var(--bg-secondary);
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-2) 0;
}

/* ============================================
   Toast/Notification
   ============================================ */

.toast-container {
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    max-width: 400px;
}

.toast {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    box-shadow: var(--shadow-lg);
    display: flex;
    gap: var(--spacing-3);
    animation: slideIn var(--transition-base);
}

.toast-success {
    border-left: 4px solid var(--success);
}

.toast-error {
    border-left: 4px solid var(--error);
}

.toast-warning {
    border-left: 4px solid var(--warning);
}

.toast-info {
    border-left: 4px solid var(--info);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-1);
}

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

/* ============================================
   Tabs
   ============================================ */

.tabs {
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-2);
    overflow-x: auto;
}

.tab {
    padding: var(--spacing-3) var(--spacing-4);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.tab.active {
    color: var(--primary-600);
    border-bottom-color: var(--primary-600);
}

[data-theme="dark"] .tab.active {
    color: var(--primary-400);
    border-bottom-color: var(--primary-400);
}

/* ============================================
   Loading Spinner
   ============================================ */

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-500);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

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

/* ============================================
   Empty State
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--spacing-12) var(--spacing-4);
}

.empty-state-icon {
    font-size: 4rem;
    opacity: 0.3;
    margin-bottom: var(--spacing-4);
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-2);
}

.empty-state-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-6);
}

/* ============================================
   Divider
   ============================================ */

.divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-4) 0;
}

.divider-vertical {
    width: 1px;
    height: auto;
    background-color: var(--border-color);
    margin: 0 var(--spacing-4);
}

/* ============================================
   Image Upload Preview
   ============================================ */

.image-preview {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--bg-secondary);
}

.image-preview img {
    width: 100%;
    height: auto;
    display: block;
}

.image-preview-remove {
    position: absolute;
    top: var(--spacing-2);
    right: var(--spacing-2);
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.image-preview-remove:hover {
    background-color: rgba(0, 0, 0, 0.9);
}

/* ============================================
   Like Button
   ============================================ */

.like-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    background-color: transparent;
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.like-btn.liked {
    color: var(--error);
}

.like-btn.liked:hover {
    color: #dc2626;
}

/* ============================================
   User Mention
   ============================================ */

.mention {
    color: var(--primary-600);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.mention:hover {
    color: var(--primary-700);
    text-decoration: underline;
}

[data-theme="dark"] .mention {
    color: var(--primary-400);
}

[data-theme="dark"] .mention:hover {
    color: var(--primary-300);
}