:root {
    --primary-color: #ff85a2; /* 粉色 */
    --primary-light: #ffd0db;
    --primary-dark: #d96c85;
    
    --secondary-color: #ffd166; /* 黄色 */
    --secondary-light: #fff5d6;
    --secondary-dark: #e6b94c;
    
    --accent-color: #50a2e6; /* 蓝色 */
    --accent-light: #c5e1fa;
    --accent-dark: #2c81c5;
    
    --text-color: #333333;
    --text-light: #666666;
    --text-lightest: #999999;
    
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --bg-dark: #e9ecef;
    
    --danger-color: #ff6b6b;
    --success-color: #51cf66;
    
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-light);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 标题和按钮样式 */
h1, h2, h3, h4 {
    color: var(--primary-dark);
    margin-bottom: 0.5em;
}

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

a:hover {
    color: var(--accent-dark);
}

button, .btn {
    cursor: pointer;
    background: none;
    border: none;
    font-size: 1rem;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

button:disabled, .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn.primary {
    background-color: var(--primary-color);
    color: white;
}

.btn.primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
}

.btn.secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.btn.secondary:hover:not(:disabled) {
    background-color: var(--secondary-dark);
}

.btn.small {
    font-size: 0.9rem;
    padding: 5px 10px;
}

.btn.danger {
    background-color: var(--danger-color);
    color: white;
}

.btn.danger:hover:not(:disabled) {
    background-color: #e65656;
}

.hidden {
    display: none !important;
}

/* 头部样式 */
header {
    padding-bottom: 20px;
    border-bottom: 1px solid var(--bg-dark);
    margin-bottom: 20px;
}

header h1 {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.email-control {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.email-display {
    display: flex;
    align-items: center;
    background-color: var(--bg-color);
    padding: 10px 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-dark);
    box-shadow: var(--box-shadow);
}

.email-display span {
    flex: 1;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--accent-color);
}

.buttons {
    display: flex;
    gap: 10px;
}

/* 授权码面板 */
.auth-panel {
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    overflow: hidden;
    border: 1px solid var(--primary-light);
}

.auth-content {
    padding: 20px;
}

.auth-content h3 {
    color: var(--primary-color);
}

.auth-content p {
    margin-bottom: 15px;
    color: var(--text-light);
}

.auth-display, .auth-input {
    display: flex;
    margin-bottom: 15px;
    gap: 10px;
}

.auth-display input, .auth-input input {
    flex: 1;
    padding: 10px;
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-dark);
    font-size: 1rem;
}

/* 主要内容区域 */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.settings-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-color);
    padding: 10px 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-dark);
    margin-bottom: 15px;
}

.refresh-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.auto-refresh {
    display: flex;
    align-items: center;
    gap: 8px;
}

.display-settings {
    display: flex;
    align-items: center;
    gap: 8px;
}

select {
    padding: 5px;
    border-radius: 4px;
    border: 1px solid var(--bg-dark);
}

/* 邮件容器 */
.mail-container {
    display: flex;
    gap: 20px;
    flex: 1;
}

.mail-list {
    flex: 0 0 40%;
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-dark);
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.mail-list-header {
    padding: 15px;
    background-color: var(--primary-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mail-list-header h3 {
    color: var(--primary-dark);
    margin: 0;
}

.mail-items {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

.mail-item {
    padding: 15px;
    border-bottom: 1px solid var(--bg-dark);
    cursor: pointer;
    transition: var(--transition);
}

.mail-item:hover {
    background-color: var(--bg-light);
}

.mail-item.active {
    background-color: var(--accent-light);
    border-left: 4px solid var(--accent-color);
}

.mail-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
}

.mail-item .sender {
    font-weight: 600;
    color: var(--text-color);
}

.mail-item .date {
    font-size: 0.85rem;
    color: var(--text-lightest);
}

.mail-item .subject {
    font-weight: 500;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mail-item .preview {
    font-size: 0.9rem;
    color: var(--text-light);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 10px;
    background-color: var(--bg-light);
}

.pagination button {
    background-color: var(--bg-color);
    border: 1px solid var(--bg-dark);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination button:hover:not(:disabled) {
    background-color: var(--primary-light);
}

/* 邮件详情视图 */
.mail-view {
    flex: 1;
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-dark);
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.mail-view-header {
    padding: 15px;
    background-color: var(--accent-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mail-view-header h3 {
    color: var(--accent-dark);
    margin: 0;
}

.mail-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

.mail-content-header {
    border-bottom: 1px solid var(--bg-dark);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.mail-content-header .subject {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--accent-dark);
}

.mail-content-header .metadata {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.mail-content-header .sender-info,
.mail-content-header .time-info {
    font-size: 0.9rem;
    color: var(--text-light);
}

.mail-content-body {
    word-break: break-word;
}

/* 空状态 */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    color: var(--text-lightest);
    text-align: center;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--bg-dark);
}

/* 页脚 */
footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--bg-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

footer nav {
    display: flex;
    gap: 15px;
}

footer nav a {
    padding: 5px 10px;
    border-radius: var(--border-radius);
}

footer nav a.active {
    background-color: var(--primary-light);
    color: var(--primary-dark);
}

footer p {
    color: var(--text-lightest);
    font-size: 0.9rem;
}

/* 关于页面 */
.about-page {
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-dark);
    box-shadow: var(--box-shadow);
    padding: 30px;
}

.about-content h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
}

.about-section {
    margin-bottom: 30px;
}

.about-section h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--accent-dark);
}

.about-section ul {
    padding-left: 25px;
}

.about-section li {
    margin-bottom: 8px;
}

.version-info {
    background-color: var(--bg-light);
    padding: 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-dark);
}

.version-info p {
    margin-bottom: 5px;
}

/* 提示框 */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 10px 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.toast.show {
    opacity: 1;
}

.toast.success {
    background-color: var(--success-color);
    color: white;
}

.toast.error {
    background-color: var(--danger-color);
    color: white;
}

/* 响应式设计 */
@media (max-width: 900px) {
    .mail-container {
        flex-direction: column;
    }
    
    .mail-list {
        flex: 0 0 auto;
    }
    
    .settings-bar {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .display-settings {
        width: 100%;
        justify-content: flex-end;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    
    .email-control {
        flex-direction: column;
    }
    
    .buttons {
        flex-direction: column;
    }
    
    .refresh-controls {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }
    
    .auto-refresh {
        width: 100%;
        justify-content: space-between;
    }
    
    .auth-display, .auth-input {
        flex-direction: column;
    }
    
    .mail-content-header .metadata {
        flex-direction: column;
    }
}