/* ========================================
   特殊字符复制工具样式
   ======================================== */

.main-content { width: 100%; max-width: 1100px; height: calc(100vh - 120px); display: flex; align-items: center; padding: 0 20px; padding-bottom: 50px; z-index: 10; overflow-y: auto; }
.container { width: 100%; }
.tool-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-xl); overflow: hidden; width: 100%; box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3); }

/* 搜索栏 */
.search-bar { padding: 16px 20px; border-bottom: 1px solid var(--border-color); }
.search-input-wrap { position: relative; }
.search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 14px; pointer-events: none; }
.search-input { width: 100%; padding: 10px 16px 10px 36px; border-radius: var(--radius-md); border: 1px solid var(--border-color); background: var(--bg-card); color: var(--text-primary); font-size: 14px; outline: none; transition: 0.2s; }
.search-input:focus { border-color: var(--primary-color); box-shadow: 0 0 0 3px var(--primary-light); }
.search-input::placeholder { color: var(--text-muted); }

/* 分类标签 */
.category-tabs { display: flex; gap: 6px; padding: 10px 20px; border-bottom: 1px solid var(--border-color); overflow-x: auto; flex-shrink: 0; }
.cat-tab { padding: 4px 12px; border-radius: 20px; border: 1px solid var(--border-color); background: rgba(255,255,255,0.03); color: var(--text-secondary); cursor: pointer; font-size: 12px; white-space: nowrap; transition: 0.2s; }
.cat-tab:hover { background: rgba(255,255,255,0.08); }
.cat-tab.active { background: var(--primary-light); border-color: var(--primary-color); color: var(--primary-color); }

/* 字符网格 */
.char-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(60px, 1fr)); gap: 4px; padding: 16px 20px; max-height: calc(100vh - 350px); overflow-y: auto; }
.char-item { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 8px 4px; border-radius: 8px; cursor: pointer; transition: 0.2s; }
.char-item:hover { background: rgba(255,255,255,0.08); transform: scale(1.1); }
.char-item .char-symbol { font-size: 20px; line-height: 1; color: var(--text-primary); font-family: var(--font-mono); }
.char-item .char-label { font-size: 9px; color: var(--text-muted); margin-top: 2px; text-align: center; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }

.empty-state { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state.hidden { display: none; }
.empty-state i { font-size: 32px; margin-bottom: 12px; }

@media (max-width: 768px) {
    .char-grid { grid-template-columns: repeat(auto-fill, minmax(52px, 1fr)); }
    .char-item .char-symbol { font-size: 18px; }
}