/* ============================================
   单位换算工具 unit_convert.php 专属样式
   复用 weight-calc 的 calc-* 基础组件
   ============================================ */

/* ===== 输入区表单控件 ===== */
.uc-inputs input[type="number"],
.uc-inputs select {
    width: 100%;
    height: 40px;
    padding: 0 12px;
    border: 1.5px solid var(--border);
    border-radius: 6px;
    font-size: 14.5px;
    color: var(--text);
    background: #fff;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}
.uc-inputs input[type="number"]:focus,
.uc-inputs select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(185,28,42,.1);
}
.uc-inputs select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}

/* ===== 容器布局 ===== */
.uc-container {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.uc-inputs {
    width: 300px;
    flex-shrink: 0;
}

.uc-result {
    flex: 1;
}

/* ===== 结果网格 ===== */
.uc-result-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.uc-result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color .15s, background .15s, box-shadow .15s;
}
.uc-result-item:hover { border-color: var(--accent); }

/* 原始输入单位：红色强调 */
.uc-result-item.uc-from {
    background: linear-gradient(135deg, #fef2f2, #fff1f1);
    border-color: #fecaca;
}
.uc-result-item.uc-from:hover { border-color: var(--accent); box-shadow: 0 2px 8px rgba(185,28,42,.08); }

/* 常用单位：蓝色边框 */
.uc-result-item.uc-fav {
    background: #eff6ff;
    border-color: #93c5fd;
}
.uc-result-item.uc-fav:hover { border-color: #3b82f6; }

.uc-res-label {
    font-size: 13px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 5px;
}
.uc-res-label .unit-tag {
    font-size: 11px;
    padding: 1px 7px;
    background: #e2e8f0;
    border-radius: 3px;
    color: #475569;
    font-weight: 600;
}
/* 常用单位星标 */
.uc-star {
    color: #d97706;
    font-size: 12px;
}

.uc-res-val {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
}
.uc-res-val.highlight {
    color: var(--accent);
    font-size: 20px;
}

/* 空状态 */
.uc-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px 20px;
    color: #94a3b8;
    font-size: 14px;
}
.uc-empty svg { margin-bottom: 10px; opacity: .35; }

/* ===== 换算规则表 ===== */
.uc-rules { margin-bottom: 24px; }
.uc-rules .calc-section-title { margin-bottom: 14px; }

.uc-rule-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 14px;
}
.uc-rule-table th,
.uc-rule-table td {
    padding: 11px 14px;
    text-align: left;
    border-bottom: 1px solid #e8ecf0;
    font-size: 13.5px;
}
.uc-rule-table th {
    background: #f1f5f9;
    font-weight: 600;
    color: var(--dark);
}
.uc-rule-table td:first-child { font-weight: 600; color: #334155; }
.uc-rule-table td:last-child { color: #475569; }
.uc-rule-table strong { color: var(--accent); }

.uc-tip {
    padding: 12px 16px;
    background: linear-gradient(135deg, #fef3c7, #fde68a22);
    border-left: 3px solid #d97706;
    border-radius: 0 6px 6px 0;
    font-size: 13px;
    color: #78350f;
}

/* ===== 响应式 ===== */
@media (max-width: 850px) {
    .uc-container { flex-direction: column; }
    .uc-inputs { width: 100%; }
    .uc-result-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
    .uc-result-grid { gap: 8px; }
    .uc-result-item { padding: 11px 12px; }
    .uc-res-val { font-size: 15px; }
    .uc-res-val.highlight { font-size: 18px; }
    .uc-rule-table th, .uc-rule-table td { padding: 8px 10px; font-size: 12.5px; }
}