/* ===== 时间戳转换 ===== */
/* 站点变量别名映射（自动跟随黑夜模式） */
:root {
    --card-bg: var(--c-bg-card);
    --border-color: var(--c-border);
    --text-primary: var(--c-text);
    --text-secondary: var(--c-text-sub);
    --text-tertiary: var(--c-text-muted);
    --bg-hover: var(--c-bg-soft);
    --input-bg: var(--c-surface-soft);
    --accent-color: var(--c-primary);
    --card-shadow: var(--shadow-md);
}

.tc-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin: 16px 0 20px;
}

.tc-title {
    font-size: 26px;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.3px;
}

.tc-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 18px;
    box-shadow: var(--card-shadow);
}

.tc-block-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 17px;
    margin: 0 0 14px;
}

.tc-tip-inline {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-tertiary);
}

.tc-mono {
    font-family: 'JetBrains Mono', Consolas, 'Courier New', monospace;
}

/* 当前时间 */
.tc-now-card {
    text-align: center;
}

.tc-now {
    padding: 8px 0 4px;
}

.tc-now-big {
    font-size: 42px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    letter-spacing: 2px;
    color: var(--accent-color);
    font-family: 'JetBrains Mono', Consolas, monospace;
}

.tc-now-sub {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.tc-now-sub code {
    margin-left: 4px;
    padding: 2px 8px;
    border-radius: 6px;
    background: var(--bg-hover);
    color: var(--text-primary);
    font-size: 12.5px;
}

/* 输入行 */
.tc-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.tc-input-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    flex: 1;
    min-width: 280px;
}

.tc-input {
    flex: 1;
    min-width: 220px;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s;
    font-family: 'JetBrains Mono', Consolas, monospace;
}

.tc-input:focus {
    border-color: var(--accent-color);
}

.tc-auto {
    font-size: 13px;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    white-space: nowrap;
}

/* 结果网格 */
.tc-result-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 6px;
}

.tc-result-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.tc-result-item {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 14px;
    background: var(--input-bg);
}

.tc-result-item .k {
    display: block;
    font-size: 12px;
    color: var(--text-tertiary);
    margin-bottom: 4px;
}

.tc-result-item .v {
    font-size: 14px;
    color: var(--text-primary);
    word-break: break-all;
}

.tc-select-all {
    cursor: pointer;
    user-select: all;
}

/* 状态/错误 */
.tc-status {
    margin-top: 10px;
    padding: 10px 14px;
    border-radius: 10px;
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #dc2626;
    font-size: 14px;
}

/* 时区网格 */
.tc-tz-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 12px;
}

.tc-tz-cell {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 14px;
    background: var(--input-bg);
    transition: border-color 0.15s;
}

.tc-tz-cell:hover {
    border-color: var(--accent-color);
}

.tc-tz-city {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.tc-tz-time {
    font-size: 16px;
    font-weight: 700;
    margin-top: 4px;
    font-variant-numeric: tabular-nums;
    font-family: 'JetBrains Mono', Consolas, monospace;
}

.tc-tz-offset {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.tc-tz-row {
    margin-bottom: 0;
}

/* 历史记录 */
.tc-history-card {
    padding: 18px 20px 20px;
}

.tc-history-empty {
    color: var(--text-tertiary);
    font-size: 14px;
    margin: 0;
}

.tc-history-list {
    list-style: none;
    margin: 0 0 12px;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tc-history-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--input-bg);
    cursor: pointer;
    transition: border-color 0.15s;
}

.tc-history-item:hover {
    border-color: var(--accent-color);
}

.tc-history-item .v {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
    color: var(--text-secondary);
}

.tc-history-item time {
    font-size: 12px;
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.tc-history-del {
    flex-shrink: 0;
    border: none;
    background: none;
    color: var(--text-tertiary);
    font-size: 15px;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 6px;
    line-height: 1;
}

.tc-history-del:hover {
    color: #dc2626;
    background: rgba(239, 68, 68, 0.1);
}

/* 移动端 */
@media (max-width: 992px) {
    .tc-tz-grid { grid-template-columns: repeat(2, 1fr); }
    .tc-result-grid, .tc-result-grid--3 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .tc-title { font-size: 21px; }
    .tc-now-big { font-size: 32px; }
    .tc-now-sub { gap: 10px; }
}