/* ============================================================
   日期计算器 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;
}

.dc-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);
}
.dc-back { color: #7dd3fc; text-decoration: none; font-size: 14px; }
.dc-back:hover { color: #38bdf8; }
.dc-brand { color: #94a3b8; font-size: 13px; }

.dc-wrap { max-width: 960px; margin: 0 auto; padding: 30px 20px 60px; }
.dc-title { margin: 0 0 10px; font-size: 1.7em; }
.dc-privacy { margin: 0 0 24px; color: #6ee7b7; font-size: 13px; }

.dc-panel {
    background: rgba(30, 41, 59, 0.52);
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 12px;
    padding: 20px 22px 26px;
}

.dc-tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
    margin-bottom: 18px;
    padding-bottom: 10px;
}
.dc-tab {
    border: none;
    background: transparent;
    color: #94a3b8;
    font-size: 13.5px;
    padding: 6px 14px;
    border-radius: 14px;
    cursor: pointer;
}
.dc-tab:hover { color: #7dd3fc; }
.dc-tab.active { background: rgba(56, 189, 248, 0.16); color: #7dd3fc; font-weight: 600; }

.dc-row {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}
.dc-row label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #cbd5e1;
}
.dc-row input[type="date"],
.dc-row input[type="datetime-local"] {
    padding: 8px 12px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 6px;
    background: rgba(2, 6, 23, 0.45);
    color: #f1f5f9;
    font-size: 14px;
    outline: none;
    color-scheme: dark;
}
.dc-row input:focus { border-color: #38bdf8; }
.dc-inline-hint { font-size: 12px; color: #64748b; }

/* 结果网格 */
.dc-results {
    margin-top: 18px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
}
.dc-stat {
    background: rgba(2, 6, 23, 0.35);
    border: 1px solid rgba(148, 163, 184, 0.16);
    border-radius: 10px;
    padding: 16px 14px;
    text-align: center;
}
.dc-stat b {
    display: block;
    font-size: 1.5em;
    color: #7dd3fc;
    margin-bottom: 6px;
    word-break: break-all;
}
.dc-stat span { font-size: 12.5px; color: #94a3b8; }
.dc-stat.big { grid-column: 1 / -1; }
.dc-stat.big b { font-size: 2em; color: #fbbf24; }

/* 已过期的倒计时 */
.dc-stat.expired b { color: #f87171; }