:root {
    --wc-bg: #0f172a;
    --wc-card: #1e293b;
    --wc-card-hi: #2a3a52;
    --wc-border: #334155;
    --wc-text: #e2e8f0;
    --wc-text-mute: #94a3b8;
    --wc-accent: #818cf8;
    --wc-accent-solid: #6366f1;
    --wc-accent-bg: rgba(99,102,241,0.15);
    --wc-danger: #ef4444;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--wc-bg);
    color: var(--wc-text);
    min-height: 100vh;
}

.wc-fullscreen { min-height: 100vh; display: flex; flex-direction: column; }

.wc-header {
    background: rgba(15,23,42,0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--wc-border);
    height: 56px;
    padding: 0 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.wc-back { color: var(--wc-text-mute); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; font-size: 14px; }
.wc-back:hover { color: var(--wc-text); }
.wc-title { font-size: 16px; font-weight: 600; }
.wc-spacer { flex: 1; }

.wc-main {
    flex: 1;
    padding: 24px 16px 60px;
    max-width: 880px;
    width: 100%;
    margin: 0 auto;
}

.wc-card {
    background: var(--wc-card);
    border: 1px solid var(--wc-border);
    border-radius: 16px;
    padding: 24px;
}

.wc-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 10px;
    margin-bottom: 18px;
}
.wc-stat {
    background: linear-gradient(180deg, var(--wc-card-hi), var(--wc-card));
    border: 1px solid var(--wc-border);
    border-radius: 10px;
    padding: 14px 12px;
    text-align: center;
}
.wc-stat-num {
    font-size: 24px;
    font-weight: 600;
    color: var(--wc-accent);
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
    margin-bottom: 4px;
    word-break: break-all;
}
.wc-stat-label {
    font-size: 12px;
    color: var(--wc-text-mute);
}

.wc-input {
    width: 100%;
    padding: 14px;
    border-radius: 10px;
    background: var(--wc-bg);
    border: 1px solid var(--wc-border);
    color: var(--wc-text);
    font-size: 15px;
    font-family: 'Menlo', 'Consolas', 'PingFang SC', monospace;
    line-height: 1.6;
    resize: vertical;
    min-height: 280px;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}
.wc-input:focus {
    border-color: var(--wc-accent-solid);
    box-shadow: 0 0 0 3px var(--wc-accent-bg);
}

.wc-actions {
    margin-top: 14px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.wc-btn {
    background: transparent;
    color: var(--wc-text);
    border: 1px solid var(--wc-border);
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background .15s, border-color .15s;
}
.wc-btn:hover { background: var(--wc-card-hi); border-color: var(--wc-accent-solid); }
.wc-btn-danger { color: var(--wc-danger); }
.wc-btn-danger:hover { background: rgba(239,68,68,0.08); border-color: var(--wc-danger); }

.wc-foot {
    margin-top: 16px;
    color: var(--wc-text-mute);
    font-size: 12px;
}

.wc-seo {
    margin-top: 32px;
    padding: 20px 24px;
    background: var(--wc-card);
    border: 1px solid var(--wc-border);
    border-radius: 12px;
    color: var(--wc-text-mute);
    font-size: 14px;
    line-height: 1.7;
}
.wc-seo h2 { color: var(--wc-text); font-size: 16px; margin-bottom: 10px; }
.wc-seo ul { padding-left: 24px; margin: 8px 0; }
.wc-seo li { margin-bottom: 4px; }
.wc-seo b { color: var(--wc-text); font-weight: 500; }

@media (max-width: 540px) {
    .wc-card { padding: 18px; }
    .wc-stat-num { font-size: 20px; }
}