:root {
    --bg: #0b0d10;
    --panel: #111827;
    --panel-border: #374151;
    --text: #e5e7eb;
    --text-muted: #9ca3af;
    --primary: #10b981;
    --primary-ink: #051410;
    --input: #0f172a;
    --input-border: #334155;
    --table-header: #0b1220;
    --danger: #ef4444;
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
    line-height: 1.45
}

.wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 18px
}

h1 {
    font-size: 20px;
    margin: 2px 0 14px 0
}

.tabs {
    display: flex;
    gap: 8px;
    margin: 8px 0 14px 0;
    flex-wrap: wrap
}

.tab {
    padding: 10px 14px;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    background: var(--panel);
    color: var(--text-muted);
    cursor: pointer;
    user-select: none
}

.tab.active {
    color: var(--text);
    border-color: var(--primary);
    box-shadow: 0 0 0 1px rgba(16, 185, 129, .25) inset
}

.card {
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    padding: 14px;
    margin: 12px 0;
    background: var(--panel)
}

label {
    display: block;
    font-weight: 600;
    margin: 8px 0 6px 0
}

input,
select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--input-border);
    border-radius: 10px;
    background: var(--input);
    color: var(--text);
    font-size: 16px;
    outline: none
}

input::placeholder {
    color: #6b7280
}

.row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap
}

.col {
    flex: 1 1 160px
}

.btn {
    padding: 12px 16px;
    border: 1px solid var(--input-border);
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    background: #0d1320;
    color: var(--text)
}

.btn.primary {
    background: var(--primary);
    color: var(--primary-ink);
    border-color: transparent
}

.btn.danger {
    background: #1a0f11;
    color: #fecaca;
    border-color: #7f1d1d
}

.result {
    font-size: 18px;
    font-weight: 700
}

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 8px;
    font-size: 13px
}

th,
td {
    border: 1px solid var(--panel-border);
    padding: 8px;
    text-align: left
}

th {
    background: var(--table-header);
    color: var(--text-muted)
}

small {
    color: var(--text-muted)
}

.spacer {
    height: 4px
}