/* ============================================================
   Excel 转换器 工具页专属样式（Slate Professional 深夜蓝，自包含）
   ============================================================ */
* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(180deg, #0f172a 0%, #111c33 100%);
    color: #f1f5f9;
    font-family: "Microsoft YaHei", "PingFang SC", -apple-system, sans-serif;
    font-size: 14px;
}

.ec-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 24px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(2, 6, 23, 0.35);
}
.ec-back { color: #7dd3fc; text-decoration: none; font-size: 14px; }
.ec-back:hover { color: #38bdf8; }
.ec-brand { color: #94a3b8; font-size: 13px; }

.ec-wrap { max-width: 1200px; margin: 0 auto; padding: 30px 20px 60px; }
.ec-title { margin: 0 0 10px; font-size: 1.7em; }
.ec-privacy { margin: 0 0 24px; color: #6ee7b7; font-size: 13px; }

.ec-layout {
    display: flex;
    gap: 22px;
    align-items: flex-start;
    flex-wrap: wrap;
}
.ec-params { flex: 0 0 300px; }
.ec-result { flex: 1 1 480px; min-width: 320px; }

.ec-config {
    background: rgba(30, 41, 59, 0.52);
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 12px;
    padding: 18px 16px;
}
.config-line {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 13.5px;
    color: #cbd5e1;
    flex-wrap: wrap;
}
.config-line > label:first-child { flex: 0 0 76px; }
.config-line select {
    padding: 7px 10px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 6px;
    background: rgba(2, 6, 23, 0.45);
    color: #f1f5f9;
    font-size: 13.5px;
    outline: none;
    flex: 1;
    min-width: 120px;
}
.config-line select:focus { border-color: #38bdf8; }
.ec-radio-row { display: flex; flex-direction: column; gap: 8px; }
.ec-check {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13.5px;
    color: #cbd5e1;
    cursor: pointer;
}
.ec-check input { accent-color: #38bdf8; cursor: pointer; }
.ec-hint { font-size: 12px; line-height: 1.7; color: #64748b; margin: 4px 0 14px; }

.ec-btn {
    width: 100%;
    padding: 10px 18px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 8px;
    background: rgba(2, 6, 23, 0.45);
    color: #e2e8f0;
    font-size: 14px;
    cursor: pointer;
    transition: filter 0.2s, border-color 0.2s;
}
.ec-btn:hover { border-color: rgba(56, 189, 248, 0.5); }
.ec-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.ec-btn-primary {
    background: linear-gradient(135deg, #0ea5e9, #38bdf8);
    border-color: transparent;
    color: #04121f;
    font-weight: 600;
}
.ec-btn-primary:hover { filter: brightness(1.1); }

/* 上传区 */
.upload-area {
    border: 2px dashed rgba(56, 189, 248, 0.4);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    color: #94a3b8;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    background: rgba(30, 41, 59, 0.4);
}
.upload-area:hover { background: rgba(56, 189, 248, 0.05); }
.upload-area.drag-over { border-color: #38bdf8; background: rgba(56, 189, 248, 0.1); color: #7dd3fc; }
.upload-area .link { color: #38bdf8; cursor: pointer; }
.upload-area .link:hover { text-decoration: underline; }
.upload-area .sub { font-size: 12px; color: #64748b; margin: 8px 0 0; }

/* 消息 */
.ec-msg {
    margin-top: 12px;
    padding: 9px 12px;
    border-radius: 6px;
    font-size: 13px;
}
.ec-msg.err {
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.35);
    color: #fca5a5;
}
.ec-msg.ok {
    background: rgba(110, 231, 183, 0.1);
    border: 1px solid rgba(110, 231, 183, 0.3);
    color: #6ee7b7;
}

/* 预览 */
.preview-box {
    margin-top: 16px;
    background: rgba(30, 41, 59, 0.52);
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 12px;
    padding: 14px 16px;
}
.preview-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 10px;
}
.preview-head h3 { margin: 0; font-size: 14.5px; color: #7dd3fc; }
.preview-head span { font-size: 12.5px; color: #94a3b8; }
.table-scroll { overflow: auto; max-height: 420px; border-radius: 8px; border: 1px solid rgba(148, 163, 184, 0.16); }
#previewTable {
    border-collapse: collapse;
    font-size: 12.5px;
    min-width: 100%;
}
#previewTable th,
#previewTable td {
    padding: 7px 12px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    border-right: 1px solid rgba(148, 163, 184, 0.08);
    white-space: nowrap;
    max-width: 240px;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: left;
}
#previewTable thead th {
    position: sticky;
    top: 0;
    background: rgba(2, 6, 23, 0.85);
    color: #7dd3fc;
    font-weight: 600;
}
#previewTable td { color: #cbd5e1; }
#previewTable tr:last-child td { border-bottom: none; }

@media (max-width: 760px) {
    .ec-params { flex: 1 1 100%; }
}