/* hidden 属性必须能压过 display:flex，否则带 flex 的容器隐藏不掉 */
[hidden] {
    display: none !important;
}

body {
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f8f9fa;
    color: #333;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 28px 30px 24px;
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin: 0 0 6px;
    font-size: 24px;
}

.subtitle {
    text-align: center;
    color: #8a8f94;
    font-size: 13px;
    margin: 0 0 22px;
}

.loader {
    padding: 26px 0 18px;
}

.loader-bar {
    height: 8px;
    background: #eef1f4;
    border-radius: 999px;
    overflow: hidden;
}

.loader-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #7aa8e8, #4a7fd4);
    transition: width 0.15s ease;
}

.loader-fill.error {
    background: #e05a5a;
}

.loader-text {
    text-align: center;
    color: #7b838b;
    font-size: 13px;
    margin-top: 12px;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-bottom: 16px;
}

.toolbar-group {
    display: flex;
    gap: 6px;
}

.chip {
    border: 1px solid #dfe4ea;
    background: #fbfcfd;
    color: #4a5560;
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.18s ease;
}

.chip:hover {
    border-color: #b9cde8;
    color: #2c3e50;
}

.chip.active {
    background: #4a7fd4;
    border-color: #4a7fd4;
    color: #fff;
}

.chip.ghost {
    margin-left: auto;
}

.sub-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: -6px 0 14px 2px;
}

.sub-label {
    font-size: 12px;
    color: #a7b0b9;
}

.sub-row .chip {
    padding: 4px 11px;
    font-size: 12px;
}

.custom-panel {
    margin: -4px 0 16px;
    padding: 12px;
    border: 1px solid #e8ecf1;
    border-radius: 10px;
    background: #fafbfd;
}

.custom-input {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 12px;
    font-size: 15px;
    line-height: 1.7;
    font-family: "Consolas", "Microsoft YaHei", monospace;
    border: 1px solid #dfe4ea;
    border-radius: 8px;
    resize: vertical;
    outline: none;
    background: #fff;
}

.custom-input:focus {
    border-color: #4a7fd4;
}

.custom-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.custom-hint {
    font-size: 12px;
    color: #a7b0b9;
}

.target-text {
    font-size: 18px;
    line-height: 1.9;
    letter-spacing: 0.02em;
    padding: 14px 16px;
    border: 1px solid #e8ecf1;
    border-radius: 10px;
    background: #fcfdfe;
    word-break: break-word;
    white-space: pre-wrap;
    font-family: "Consolas", "Microsoft YaHei", monospace;
}

.target-text .ch {
    position: relative;
}

.target-text .ch.ok {
    color: #2e7d4f;
}

.target-text .ch.bad {
    color: #fff;
    background: #e05a5a;
    border-radius: 3px;
}

.target-text .ch.tok-start {
    border-left: 1px solid #d3dbe4;
    margin-left: -1px;
}

.target-text .ch.cursor::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: #4a7fd4;
}

.token-note {
    color: #8a8f94;
    font-size: 12px;
    margin-top: 8px;
}

.input {
    width: 100%;
    box-sizing: border-box;
    margin-top: 14px;
    padding: 12px 14px;
    font-size: 16px;
    line-height: 1.7;
    font-family: "Consolas", "Microsoft YaHei", monospace;
    border: 1px solid #dfe4ea;
    border-radius: 10px;
    resize: vertical;
    outline: none;
    transition: border-color 0.18s ease;
}

.input:focus {
    border-color: #4a7fd4;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 10px;
    margin-top: 18px;
}

.stat {
    background: #f8fafc;
    border: 1px solid #eef1f5;
    border-radius: 10px;
    padding: 12px 10px;
    text-align: center;
}

.stat.main {
    background: #f0f6ff;
    border-color: #d6e4f8;
}

.stat-value {
    font-size: 22px;
    font-weight: 600;
    color: #2c3e50;
    font-variant-numeric: tabular-nums;
}

.stat.main .stat-value {
    color: #2c6ad4;
}

.stat-value .unit {
    font-size: 12px;
    font-weight: 400;
    color: #8a8f94;
    margin-left: 4px;
}

.stat-label {
    font-size: 12px;
    color: #8a8f94;
    margin-top: 4px;
}

.chart-wrap {
    margin-top: 18px;
    border: 1px solid #eef1f5;
    border-radius: 10px;
    background: #fbfcfe;
    padding: 10px 12px 6px;
}

.chart-head {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 6px;
}

.chart-title {
    font-size: 13px;
    font-weight: 600;
    color: #55606a;
}

.chart-hint {
    font-size: 12px;
    color: #a7b0b9;
}

.chart {
    display: block;
    width: 100%;
    height: 160px;
}

.footnote {
    margin-top: 16px;
    text-align: center;
    color: #9aa2aa;
    font-size: 12px;
}

@media (max-width: 560px) {
    .container {
        padding: 20px 16px;
    }
    .target-text {
        font-size: 16px;
    }
}