:root {
    --bg-color: #F5F5F5;
    --text-color: #333;
    --secondary-color: #999;
    --accent-color: #666;
    --sidebar-bg: #F5F5F5;
    --sidebar-btn-active: #f0f0f0;
    --border-color: #eee;
    --typing-width: 60%;
    --typing-align: left;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

#typing-area {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

#text-container {
    width: var(--typing-width);
    max-width: 1200px;
    display: flex;
    justify-content: center;
}

#text-display {
    font-size: 2.5rem;
    line-height: 1.5;
    text-align: var(--typing-align);
    position: relative;
}

@media (max-width: 768px) {
    #text-display {
        font-size: 1.8rem;
    }
}

.cursor {
    border-right: 2px solid var(--text-color);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    from, to { border-color: transparent }
    50% { border-color: var(--text-color) }
}

#settings-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--secondary-color);
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 101;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.8);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#settings-btn:hover {
    color: var(--accent-color);
    background-color: #fff;
}

#settings-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-color);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow: hidden;
    z-index: 100;
    display: flex;
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
}

#settings-panel.open {
    transform: translateX(0);
}

#close-settings {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 101;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#close-settings:hover {
    background-color: rgba(0,0,0,0.05);
}

.settings-sidebar {
    width: 220px;
    padding: 20px;
    background-color: var(--sidebar-bg);
    height: 100%;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
}

.settings-sidebar h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.settings-sidebar nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.sidebar-btn {
    width: 100%;
    text-align: left;
    padding: 12px 16px;
    border: none;
    background: none;
    color: var(--text-color);
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-btn:hover, .sidebar-btn.active {
    background-color: var(--sidebar-btn-active);
}

.settings-content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
    background-color: var(--bg-color);
}

.settings-tab {
    display: none;
}

.settings-tab.active {
    display: block;
}

.tab-header {
    font-size: 1.2rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.theme-options {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 30px;
}

.theme-option {
    width: 50px;
    height: 50px;
    border-radius: 6px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: relative;
}

.theme-option.custom::after {
    content: "🎨";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.2rem;
}

.theme-option:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.theme-option.selected {
    border-color: var(--accent-color);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

#color-picker-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0,0,0,0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 200;
}

#color-picker-modal.open {
    display: flex;
}

.color-picker-content {
    background-color: var(--sidebar-bg);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    width: 300px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

#custom-color-picker {
    width: 100px;
    height: 100px;
    border: none;
    border-radius: 50%;
    margin: 15px auto;
    cursor: pointer;
    background-color: var(--accent-color);
}

.color-picker-btns {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.color-picker-btns button {
    flex: 1;
}

textarea, button, select, input {
    width: 100%;
    padding: 10px 14px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--sidebar-bg);
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color 0.2s;
}

textarea {
    min-height: 180px;
    resize: vertical;
    line-height: 1.6;
}

textarea:focus, select:focus, button:focus, input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.btn-group {
    display: flex;
    gap: 12px;
}

.btn-group button {
    flex: 1;
}

.help-text {
    font-size: 0.85rem;
    color: var(--secondary-color);
    margin-top: -10px;
    margin-bottom: 20px;
    line-height: 1.5;
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.display-setting {
    margin-bottom: 20px;
}

.display-setting label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.align-options {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.align-option {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s;
}

.align-option:hover, .align-option.selected {
    background-color: var(--sidebar-btn-active);
}

/* 开关样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
    vertical-align: middle;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}