:root {
    --bg-color: #f4f5f7;
    --container-bg: #ffffff;
    --text-main: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #dddddd;
    --border-light: #e9ecef;
    --primary-color: #fb7299;
    --primary-hover: #e56285;
    --input-bg: #ffffff;
    --result-bg: #f8f9fa;
    --result-header-bg: #f1f3f5;
    --result-hover: #ffffff;
    --success-bg: #f0fdf4;
    --success-text: #16a34a;
    --warning-bg: #fffbeb;
    --warning-text: #d97706;
    --error-bg: #fff5f5;
    --error-text: #dc3545;
    --info-text: #2563eb;
    --intro-bg: #fffafb;
    --intro-border: #ffe3ec;
    --btn-copy: #00a1d6;
    --btn-copy-hover: #008cba;
    --btn-copy-all: #28a745;
    --btn-copy-all-hover: #218838;
    --btn-clear: #6c757d;
    --btn-clear-hover: #5a6268;
    --shadow-color: rgba(0,0,0,0.1);
    --select-bg: #f8f9fa;
    --select-border: #ddd;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-main: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #808080;
    --border-color: #444444;
    --border-light: #2c2c2c;
    --primary-color: #fb7299;
    --primary-hover: #e56285;
    --input-bg: #2d2d2d;
    --result-bg: #252525;
    --result-header-bg: #2a2a2a;
    --result-hover: #2d2d2d;
    --success-bg: rgba(22, 163, 74, 0.15);
    --success-text: #4ade80;
    --warning-bg: rgba(217, 119, 6, 0.15);
    --warning-text: #fbbf24;
    --error-bg: rgba(220, 53, 69, 0.15);
    --error-text: #f87171;
    --info-text: #60a5fa;
    --intro-bg: rgba(251, 114, 153, 0.05);
    --intro-border: rgba(251, 114, 153, 0.2);
    --btn-copy: #0082ad;
    --btn-copy-hover: #00a1d6;
    --btn-copy-all: #1e7e34;
    --btn-copy-all-hover: #28a745;
    --btn-clear: #495057;
    --btn-clear-hover: #6c757d;
    --shadow-color: rgba(0,0,0,0.5);
    --select-bg: #2d2d2d;
    --select-border: #444444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 20px 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}
.container {
    background: var(--container-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px var(--shadow-color);
    width: 95%;
    max-width: 650px;
    box-sizing: border-box;
    position: relative;
    transition: background-color 0.3s, box-shadow 0.3s;
}
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}
h1 {
    color: var(--primary-color);
    margin: 0;
    font-size: 24px;
}
.input-group {
    margin-bottom: 20px;
}
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    margin-bottom: 10px;
    resize: vertical;
    min-height: 100px;
    background-color: var(--input-bg);
    color: var(--text-main);
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}
button {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}
button:hover {
    background-color: var(--primary-hover);
}
button:disabled {
    background-color: var(--text-muted);
    cursor: not-allowed;
}
.progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--border-light);
    border-radius: 3px;
    margin-bottom: 10px;
    overflow: hidden;
    display: none;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #ff9ec4);
    width: 0%;
    transition: width 0.3s ease;
}
.stats {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: none;
}
.result {
    margin-top: 20px;
    display: none;
}
.result-box {
    background-color: var(--result-bg);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    margin-bottom: 10px;
    max-height: none;
    overflow-y: visible;
    transition: background-color 0.3s, border-color 0.3s;
}
.result-header {
    display: flex;
    align-items: center;
    padding: 8px 15px;
    border-bottom: 1px solid var(--border-light);
    background-color: var(--result-header-bg);
    border-radius: 4px 4px 0 0;
    font-size: 13px;
    color: var(--text-secondary);
    gap: 8px;
    user-select: none;
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}
.result-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-light);
    cursor: pointer;
    transition: background-color 0.2s, border-left 0.1s, border-color 0.3s;
    border-left: 3px solid transparent;
}
.result-item:last-child {
    border-bottom: none;
}
.result-item:hover {
    background-color: var(--result-hover);
}
.result-item.checked {
    border-left: 3px solid var(--primary-color);
}
.result-item input[type="checkbox"] {
    margin-top: 2px;
    flex-shrink: 0;
    width: 15px;
    height: 15px;
    accent-color: var(--primary-color);
    cursor: pointer;
}
.result-item-body {
    flex: 1;
    min-width: 0;
}
.result-item.error-item {
    background-color: var(--error-bg);
}
.result-item.warning-item {
    background-color: var(--warning-bg);
}
.result-item.info-item {
    background-color: var(--info-bg);
}
.result-item.success-item {
    background-color: var(--success-bg);
}
.result-original {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 4px;
    word-break: break-all;
}
.result-long {
    font-size: 14px;
    color: var(--text-main);
    word-break: break-all;
}
.result-long.error {
    color: var(--error-text);
}
.result-long.warning {
    color: var(--warning-text);
}
.result-long.info {
    color: var(--info-text);
}
.result-long.success {
    color: var(--success-text);
}
.btn-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.btn-group button {
    flex: 1;
    min-width: 120px;
}
.copy-btn {
    background-color: var(--btn-copy);
}
.copy-btn:hover {
    background-color: var(--btn-copy-hover);
}
.copy-all-btn {
    background-color: var(--btn-copy-all);
}
.copy-all-btn:hover {
    background-color: var(--btn-copy-all-hover);
}
.clear-btn {
    background-color: var(--btn-clear);
}
.clear-btn:hover {
    background-color: var(--btn-clear-hover);
}
.error {
    color: var(--error-text);
    margin-top: 10px;
    text-align: center;
    display: none;
}
.loading {
    text-align: center;
    display: none;
    color: var(--text-secondary);
    padding: 10px;
}
.tip {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 8px;
}
.intro {
    margin-top: 30px;
    padding: 15px 20px;
    background-color: var(--intro-bg);
    border-radius: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    border: 1px solid var(--intro-border);
    border-left: 4px solid var(--primary-color);
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}
.intro h3 {
    margin-top: 0;
    color: var(--primary-color);
    font-size: 16px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}
.intro p {
    margin: 8px 0;
}
.theme-select {
    padding: 6px 10px;
    border-radius: 4px;
    border: 1px solid var(--select-border);
    background-color: var(--select-bg);
    color: var(--text-main);
    font-size: 13px;
    cursor: pointer;
    outline: none;
    transition: all 0.3s;
}
.theme-select:focus {
    border-color: var(--primary-color);
}
.status-success-text {
    color: #16a34a;
    font-weight: bold;
}
.status-warning-text {
    color: #d97706;
    font-weight: bold;
}
.status-error-text {
    color: #dc3545;
    font-weight: bold;
}
.result-header-label {
    cursor: pointer;
}
.result-header-count {
    margin-left: auto;
    font-size: 12px;
}
.result-message {
    font-size: 12px;
    margin-top: 4px;
    color: var(--text-muted);
}
.copied {
    background-color: #28a745 !important;
}