:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --primary-color: #4361ee;
    --secondary-color: #f8f9fa;
    --border-color: #dee2e6;
    --button-hover: #e9ecef;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #f0f0f0;
    --primary-color: #5e72e4;
    --secondary-color: #2d2d2d;
    --border-color: #444444;
    --button-hover: #333333;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, 
                 Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    height: 100vh;
    overflow: hidden;
}

/* 新增header样式 */
header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 20px 0;
    margin-bottom: 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.editor-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 160px); /* 减去header高度 */
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.toolbar {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

button {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

button:hover {
    background-color: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

#text-editor {
    flex: 1;
    width: 100%;
    padding: 20px;
    font-size: 16px;
    line-height: 1.7;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--secondary-color);
    color: var(--text-color);
    resize: none;
    outline: none;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    overflow: auto;
    font-family: inherit;
}

#text-editor:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

#char-count {
    margin-left: auto;
    align-self: center;
    font-size: 14px;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .editor-container {
        padding: 10px;
    }
    
    .toolbar {
        padding: 8px 0;
    }
    
    button {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    #text-editor {
        padding: 15px;
        font-size: 15px;
    }
}

.search-panel {
    display: none; /* 默认隐藏 */
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.search-panel.active {
    display: block;
}

.search-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 10px;
}

.search-controls input {
    flex: 1;
    min-width: 120px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.search-controls button {
    padding: 8px 12px;
    font-size: 14px;
}

#search-status {
    font-size: 14px;
    color: var(--primary-color);
    padding: 0 5px;
}

.highlight {
    background-color: rgba(255, 255, 0, 0.3);
    font-weight: bold;
}

.current-highlight {
    background-color: rgba(255, 200, 0, 0.6);
    font-weight: bold;
}

@media (max-width: 768px) {
    .search-controls {
        flex-direction: column;
    }
    
    .search-controls input {
        width: 100%;
    }
    
    /* 响应式header调整 */
    header {
        flex-direction: column;
        gap: 10px;
        padding: 15px 0;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .editor-container {
        height: calc(100vh - 200px); /* 调整高度 */
    }
}

@media (max-width: 480px) {
    .toolbar {
        gap: 8px;
    }
    
    #char-count {
        display: none;
    }
    
    .search-controls button {
        width: 100%;
    }
    
    /* 小屏幕header调整 */
    header svg {
        width: 40px;
        height: 40px;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
}