/* 基本样式 */
:root {
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --background-color: #f0f2f5;
    --card-background-color: #ffffff;
    --text-color: #333;
    --border-color: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
}

header {
    background-color: var(--card-background-color);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px var(--shadow-color);
}

h1, h2 {
    color: var(--text-color);
    margin: 0;
}

h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

/* 布局 */
.main-container {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    align-items: flex-start;
}

.sidebar, .main-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* 卡片样式 */
.card {
    background-color: var(--card-background-color);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px var(--shadow-color);
}

/* 控件样式 */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}
.control-group:last-child {
    margin-bottom: 0;
}

input[type="text"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    box-sizing: border-box;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--primary-hover-color);
}

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

/* 邮箱信息 */
#mailbox-info p {
    margin: 0.25rem 0;
    word-break: break-all;
}
#mailbox-info span {
    font-weight: 600;
    color: var(--primary-color);
}

/* 收件箱 */
.inbox-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}
.inbox-header h2 {
    margin: 0;
}

#messages-list {
    max-height: 400px;
    overflow-y: auto;
}

.message-item {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s;
}
.message-item:first-child {
    border-top: none;
}
.message-item:hover {
    background-color: #f8f9fa;
}
.message-item.selected {
    background-color: #e9ecef;
}
.message-item p {
    margin: 0 0 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.message-item p strong {
    font-weight: 500;
}

/* 邮件内容 */
#message-content {
    min-height: 60vh;
}
#message-content .email-header {
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}
#message-content .email-header p {
    margin: 0.25rem 0;
}
#message-content .email-body {
    line-height: 1.7;
    white-space: pre-wrap;
    word-wrap: break-word;
}
/* 优化API返回的HTML内容显示 */
.email-body div, .email-body p, .email-body span, .email-body a {
    white-space: normal !important; /* 覆盖父级设置，让内容正常换行 */
    word-wrap: break-word !important;
}

.email-body h1, .email-body h2, .email-body h3, .email-body p, .email-body ul, .email-body ol, .email-body blockquote {
    margin-top: 0.5em;
    margin-bottom: 0.5em;
}

.email-body * {
    max-width: 100%; /* 防止图片或表格超宽 */
}

.hidden {
    display: none;
}

/* 响应式布局 */
@media (max-width: 992px) {
    .main-container {
        grid-template-columns: 1fr;
    }
}