/* ============================================================
   单位换算器 · 页面专属样式（tool.css）
   迪妙网安反钓工具箱 · 纯前端 · 本地运行
   说明：导航/页脚样式由 ../../style.css 全局决定，本文件仅定义工具页面区块
   ============================================================ */

/* ===== 本地运行提示条 ===== */
.uc-note {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: linear-gradient(135deg, #e8f1ff 0%, #f0f5ff 100%);
    border: 1.5px solid rgba(26, 110, 255, 0.15);
    border-radius: var(--radius);
    padding: 20px 24px;
}
.uc-note-icon {
    width: 40px; height: 40px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.uc-note-icon svg { width: 22px; height: 22px; color: white; }
.uc-note h4 { font-size: 15px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.uc-note p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin: 0; }

/* ===== 面板容器 ===== */
.uc-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
}
.uc-panel-head { margin-bottom: 18px; }
.uc-panel-head h3 { font-size: 18px; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.uc-panel-head p { font-size: 13px; color: var(--text-light); margin: 0; }

/* ===== 分类标签 ===== */
.uc-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}
.uc-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 100px;
    border: 1.5px solid var(--border);
    background: white;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.uc-tab .uc-tab-ico { font-size: 14px; line-height: 1; }
.uc-tab:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.uc-tab.active {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 16px rgba(26, 110, 255, 0.3);
    font-weight: 600;
}

/* ===== 单位搜索 ===== */
.uc-search {
    position: relative;
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}
.uc-search svg {
    position: absolute;
    left: 14px;
    width: 16px; height: 16px;
    color: var(--text-light);
    pointer-events: none;
}
.uc-search input {
    flex: 1;
    padding: 12px 44px 12px 42px;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text);
    background: var(--bg-warm);
    transition: var(--transition);
    outline: none;
}
.uc-search input:focus {
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(26, 110, 255, 0.12);
}
#ucSearchClear {
    position: absolute;
    right: 8px;
    width: 28px; height: 28px;
    border: none;
    border-radius: 50%;
    background: var(--border);
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
    display: none;
}
#ucSearchClear:hover { background: var(--danger); color: white; }
#ucSearchClear.show { display: block; }

/* ===== 换算器主体 ===== */
.uc-converter {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 16px;
    align-items: stretch;
}
.uc-box {
    background: var(--bg-warm);
    border: 1.5px solid var(--border);
    border-radius: 14px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: var(--transition);
}
.uc-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 110, 255, 0.1);
    background: white;
}
.uc-box label {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 0.5px;
}
.uc-box input[type="text"] {
    width: 100%;
    border: none;
    background: transparent;
    font-family: inherit;
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 800;
    color: var(--text);
    outline: none;
    padding: 0;
    border-bottom: 2px dashed transparent;
}
.uc-box input[type="text"]:focus { border-bottom-color: rgba(26, 110, 255, 0.3); }
#ucToVal, #ucBaseOut { color: var(--primary); word-break: break-all; }
.uc-box select {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    background: white;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    outline: none;
    transition: var(--transition);
}
.uc-box select:focus { border-color: var(--primary); }

.uc-swap {
    align-self: center;
    width: 46px; height: 46px;
    border: none;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 16px rgba(26, 110, 255, 0.35);
    transition: var(--transition);
    flex-shrink: 0;
}
.uc-swap svg { width: 20px; height: 20px; }
.uc-swap:hover { transform: rotate(180deg) scale(1.08); box-shadow: 0 8px 22px rgba(26, 110, 255, 0.45); }

/* ===== 工具栏 ===== */
.uc-toolbar {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px dashed var(--border);
}
.uc-tool-group {
    display: flex;
    align-items: center;
    gap: 8px;
}
.uc-tool-group > label:first-child { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.uc-tool-group select {
    padding: 8px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    background: white;
    font-family: inherit;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    outline: none;
}
.uc-check {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}
.uc-check input { accent-color: var(--primary); width: 15px; height: 15px; cursor: pointer; }
.uc-toolbar-btns { margin-left: auto; gap: 10px; }

.uc-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    background: white;
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}
.uc-btn svg { width: 15px; height: 15px; }
.uc-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.uc-btn.starred { border-color: #f59e0b; color: #d97706; background: #fffbeb; }
.uc-btn.starred svg { fill: #f59e0b; }

/* ===== 换算公式条 ===== */
.uc-formula {
    margin-top: 16px;
    padding: 12px 16px;
    background: var(--primary-light);
    border-radius: 10px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 13px;
    color: var(--primary-dark);
    word-break: break-all;
    line-height: 1.7;
}

/* ===== 收藏夹 ===== */
.uc-favs { margin-top: 16px; }
.uc-favs-title { font-size: 13px; font-weight: 700; color: var(--text-secondary); margin-bottom: 10px; }
.uc-favs-list { display: flex; flex-wrap: wrap; gap: 8px; }
.uc-fav-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px 6px 14px;
    background: white;
    border: 1.5px solid var(--border);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}
.uc-fav-chip:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.uc-fav-chip .uc-fav-x {
    width: 18px; height: 18px;
    border: none;
    border-radius: 50%;
    background: var(--bg-warm);
    color: var(--text-light);
    font-size: 12px;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
}
.uc-fav-chip .uc-fav-x:hover { background: var(--danger); color: white; }

/* ===== 常用速查网格 ===== */
.uc-quick {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.uc-quick-card {
    background: var(--bg-warm);
    border: 1.5px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    font-family: inherit;
}
.uc-quick-card:hover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(26, 110, 255, 0.12);
}
.uc-quick-card .q-from {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 4px;
}
.uc-quick-card .q-to {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
    word-break: break-all;
}
.uc-quick-card:hover .q-to { color: var(--primary); }

/* ===== 帮助列表 ===== */
.uc-help { list-style: none; }
.uc-help li {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.9;
    padding: 6px 0 6px 20px;
    position: relative;
}
.uc-help li::before {
    content: '';
    position: absolute;
    left: 0; top: 14px;
    width: 6px; height: 6px;
    background: var(--primary);
    border-radius: 50%;
}
.uc-help li strong { color: var(--text); }

.uc-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 10px;
    background: var(--primary-gradient);
    color: white;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(26, 110, 255, 0.3);
}
.uc-back svg { width: 15px; height: 15px; }
.uc-back:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26, 110, 255, 0.4); }

/* ===== 输入错误提示 ===== */
.uc-input-error {
    border-color: var(--danger) !important;
    background: var(--danger-light) !important;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .uc-quick { grid-template-columns: repeat(2, 1fr); }
    .uc-toolbar-btns { margin-left: 0; width: 100%; }
}

@media (max-width: 768px) {
    .uc-panel { padding: 20px 16px; }
    .uc-note { flex-direction: column; gap: 12px; padding: 16px; }
    .uc-note-icon { width: 36px; height: 36px; }

    /* 分类标签横向滑动 */
    .uc-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 6px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .uc-tabs::-webkit-scrollbar { display: none; }
    .uc-tab { flex-shrink: 0; }

    /* 换算器纵向排列，交换按钮横置中间 */
    .uc-converter { grid-template-columns: 1fr; gap: 10px; }
    .uc-swap {
        justify-self: center;
        transform: rotate(90deg);
        width: 40px; height: 40px;
    }
    .uc-swap:hover { transform: rotate(270deg) scale(1.05); }

    .uc-box input[type="text"] { font-size: 22px; }
    .uc-toolbar { gap: 12px; }
    .uc-toolbar-btns .uc-btn { flex: 1; justify-content: center; }
    .uc-quick { grid-template-columns: 1fr; }
    .uc-formula { font-size: 12px; }
}