/* ========================================
   条形码工具样式
   ======================================== */

/* 主内容 */
.main-content { width: 100%; max-width: 800px; height: calc(100vh - 120px); display: flex; align-items: center; padding: 0 20px; padding-bottom: 50px; z-index: 10; }
.container { width: 100%; }
.tool-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-xl); overflow: hidden; display: flex; flex-direction: column; height: 100%; }

/* 选项栏 */
.options-bar { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; padding: 12px 20px; border-bottom: 1px solid var(--border-color); background: rgba(0,0,0,0.2); flex-shrink: 0; }
.opt-item { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-secondary); }
.opt-item select { background: rgba(0,0,0,0.3); border: 1px solid var(--border-color); color: var(--text-primary); padding: 4px 8px; border-radius: var(--radius-sm); outline: none; }

/* 开关样式 */
.switch { position: relative; display: inline-block; width: 36px; height: 20px; vertical-align: middle; margin-left: 2px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(255,255,255,0.1); border: 1px solid var(--border-color); transition: .3s; border-radius: 20px; }
.slider:before { position: absolute; content: ""; height: 14px; width: 14px; left: 2px; bottom: 2px; background-color: var(--text-secondary); transition: .3s; border-radius: 50%; }
input:checked + .slider { background-color: var(--primary-color); border-color: var(--primary-color); }
input:checked + .slider:before { transform: translateX(16px); background-color: #fff; }

/* 输入输出组 */
.io-group { flex: 1; display: flex; flex-direction: column; padding: 16px 20px; gap: 10px; border-bottom: 1px solid var(--border-color); }
.io-header { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; font-size: 12px; color: var(--text-muted); }
.io-input-single { background: rgba(0,0,0,0.2); border: 1px solid var(--border-color); border-radius: var(--radius-md); color: var(--text-primary); padding: 10px 12px; font-family: var(--font-mono); font-size: 15px; outline: none; }
.io-input-single:focus { border-color: var(--primary-color); }

/* 操作栏 */
.action-bar { display: flex; justify-content: center; gap: 12px; align-items: center; padding: 12px 0 0; }
.btn-icon { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px 8px; border-radius: 4px; transition: 0.2s; }
.btn-icon:hover { color: var(--primary-color); background: rgba(255,255,255,0.05); }

/* 预览区 */
.preview-section {
    padding: 10px 20px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
}
.preview-box {
    width: 100%;
    max-width: 100%;
    height: 180px;    /* 缩减外边框上下高度 */
    margin: 0 auto;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 子元素绝对定位，重叠居中 */
.preview-box #bcPlaceholder,
.preview-box #bcCanvas {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.preview-box #bcPlaceholder {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 1;
}
.preview-box #bcCanvas {
    max-width: 95%;
    max-height: 95%;
    z-index: 2;
    display: block;
}

/* 状态提示 */
.status-msg { padding: 12px 20px; text-align: center; font-size: 13px; border-top: 1px solid var(--border-color); }
.status-msg.error { color: var(--error-color); background: rgba(20, 184, 166, 0.1); }
.status-msg.success { color: var(--success-color); background: rgba(20, 184, 166, 0.1); }

/* 响应式 */
@media (max-width: 768px) {
    .main-content { height: auto; padding: 80px 10px 60px; overflow-y: auto; }
    .tool-card { height: auto; min-height: 80vh; }
    .preview-section { overflow-y: visible; }
}