/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
    white-space: nowrap;
}

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

.btn-primary {
    background: var(--accent);
    color: #fff;
}

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

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

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

.btn-icon {
    padding: 6px 10px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
}

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

.btn-icon.active {
    background: var(--accent-muted);
    color: var(--accent);
    border-color: var(--accent);
}

.btn-full {
    width: 100%;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover:not(:disabled) {
    background: #c0392b;
}

/* ===== Asset Card ===== */
.asset-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.15s;
}

.asset-card:hover {
    border-color: var(--accent-muted);
    transform: translateY(-2px);
}

.asset-card-thumb {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.asset-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.asset-card-thumb .placeholder {
    color: var(--text-muted);
    font-size: 32px;
}

.asset-card-info {
    padding: 10px 12px;
}

.asset-card-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.asset-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-muted);
}

/* ===== Category Badge ===== */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 500;
}

.badge-sprite { background: #1a3a2a; color: #2ecc71; }
.badge-texture { background: #3a2a1a; color: #f39c12; }
.badge-3d_model { background: #1a2a3a; color: #4a9eff; }
.badge-icon { background: #2a1a3a; color: #9b59b6; }
.badge-concept_art { background: #3a1a2a; color: #e74c3c; }
.badge-ui_element { background: #1a3a3a; color: #1abc9c; }
.badge-other { background: #2a2a2a; color: #95a5a6; }

/* ===== Tag Input ===== */
.tag-input-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    cursor: text;
    transition: border-color 0.2s;
}

.tag-input-container:focus-within {
    border-color: var(--accent);
}

.tag-input-container input,
.tag-input-container input:focus {
    flex: 1;
    min-width: 80px;
    width: auto;
    border: none !important;
    background: transparent !important;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    padding: 2px 4px;
}

.tag-input-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    background: var(--accent-muted);
    color: var(--accent);
    border: 1px solid var(--accent);
    white-space: nowrap;
}

.tag-input-chip .tag-remove {
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    opacity: 0.7;
    transition: opacity 0.15s;
}

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

/* ===== Tag Chip ===== */
.tag-chip {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.tag-chip:hover,
.tag-chip.active {
    background: var(--accent-muted);
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--accent);
}

.form-group select {
    cursor: pointer;
}

/* ===== Drop Zone ===== */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    margin-bottom: 16px;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(74, 158, 255, 0.05);
}

.file-name {
    font-size: 13px;
    color: var(--accent);
    margin-bottom: 16px;
    word-break: break-all;
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: #fff;
    box-shadow: var(--shadow);
    animation: toast-in 0.3s ease;
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--accent); }

@keyframes toast-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Loading Spinner ===== */
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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