{{define "styles"}}
<style>
    /* ===== MailGo 设计系统（参考 QQ 邮箱布局） ===== */
    :root {
        --primary: #1677ff;
        --primary-hover: #0e5fd8;
        --primary-soft: #e8f1ff;
        --orange: #ff9500;
        --orange-hover: #f08800;
        --danger: #e34d59;
        --danger-soft: #fde8e8;
        --success: #34a853;
        --success-soft: #e6f7ec;
        --sidebar-bg: #f6f8fc;
        --topbar-h: 56px;
        --border: #e5e6eb;
        --border-light: #f0f1f3;
        --text: #1f2329;
        --text-2: #646a73;
        --text-3: #8f959e;
        --radius: 8px;
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
            "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        background: #f6f8fc; color: var(--text); font-size: 14px;
    }
    a { text-decoration: none; color: inherit; }
    ul { list-style: none; }
    input, textarea, select, button { font-family: inherit; }
    input[type="checkbox"] { width: 15px; height: 15px; accent-color: var(--primary); cursor: pointer; flex-shrink: 0; }
    svg { flex-shrink: 0; }

    /* ---------- 顶部导航栏 ---------- */
    .topbar {
        position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h);
        background: #fff; border-bottom: 1px solid var(--border);
        display: flex; align-items: center; gap: 28px; padding: 0 20px; z-index: 100;
    }
    .logo { display: flex; align-items: center; gap: 9px; }
    .logo-icon {
        width: 34px; height: 34px; border-radius: 9px; color: #fff; font-size: 17px;
        background: linear-gradient(135deg, #1677ff, #4aa3ff);
        display: inline-flex; align-items: center; justify-content: center;
        box-shadow: 0 2px 6px rgba(22, 119, 255, 0.35);
    }
    .logo-text { font-size: 19px; font-weight: 700; color: var(--primary); letter-spacing: 0.5px; }
    .logo-text em { font-style: normal; font-weight: 400; font-size: 13px; color: var(--text-2); margin-left: 3px; }
    .topbar-search {
        flex: 0 1 340px; height: 34px; display: none; align-items: center; gap: 8px;
        background: #f2f3f5; border: 1px solid transparent; border-radius: 17px;
        padding: 0 14px; color: var(--text-3);
    }
    body.page-list .topbar-search { display: flex; }
    .topbar-search:focus-within { background: #fff; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.12); }
    .topbar-search input { border: none; outline: none; background: transparent; flex: 1; font-size: 13px; color: var(--text); }
    .topbar-search input::placeholder { color: var(--text-3); }
    .topbar-right { margin-left: auto; display: flex; align-items: center; gap: 18px; }
    .topbar-link { color: var(--text-2); font-size: 13.5px; }
    .topbar-link:hover { color: var(--primary); }
    .user-chip { display: flex; align-items: center; gap: 8px; }
    .user-email { font-size: 13px; color: var(--text-2); max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .logout-form { display: inline-flex; }
    .icon-btn {
        display: inline-flex; align-items: center; justify-content: center;
        width: 30px; height: 30px; border: 1px solid var(--border); border-radius: 6px;
        background: #fff; color: var(--text-2); cursor: pointer;
    }
    .icon-btn:hover { color: var(--danger); border-color: var(--danger); }

    /* ---------- 头像 ---------- */
    .avatar {
        width: 36px; height: 36px; border-radius: 50%;
        display: inline-flex; align-items: center; justify-content: center;
        font-size: 15px; font-weight: 600; flex-shrink: 0; user-select: none;
    }
    .avatar-sm { width: 28px; height: 28px; font-size: 12.5px; }

    /* ---------- 整体布局 ---------- */
    .app-body { display: flex; min-height: 100vh; padding-top: var(--topbar-h); }

    /* ---------- 左侧文件夹导航 ---------- */
    .mail-sidebar {
        width: 200px; flex-shrink: 0;
        background: var(--sidebar-bg); border-right: 1px solid var(--border);
        padding: 16px 12px; display: flex; flex-direction: column; gap: 14px;
        position: sticky; top: var(--topbar-h); height: calc(100vh - var(--topbar-h));
    }
    .compose-btn {
        display: flex; align-items: center; justify-content: center; gap: 7px;
        height: 38px; border-radius: 19px; color: #fff; font-size: 14.5px; font-weight: 600;
        background: linear-gradient(135deg, #ffa940, #ff9500);
        box-shadow: 0 2px 8px rgba(255, 149, 0, 0.35);
        transition: transform 0.1s, box-shadow 0.1s;
    }
    .compose-btn:hover { background: linear-gradient(135deg, #ff9d2e, #f08800); box-shadow: 0 3px 10px rgba(255, 149, 0, 0.45); transform: translateY(-1px); }
    .folder-nav { display: flex; flex-direction: column; gap: 3px; }
    .folder {
        display: flex; align-items: center; gap: 10px;
        height: 36px; padding: 0 10px; border-radius: 7px;
        color: var(--text-2); font-size: 13.5px; position: relative;
    }
    .folder:hover { background: #eef1f6; color: var(--text); }
    .folder.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
    .folder.active::before {
        content: ""; position: absolute; left: -12px; top: 9px; bottom: 9px;
        width: 3px; border-radius: 2px; background: var(--primary);
    }
    .folder .badge {
        margin-left: auto; min-width: 20px; height: 20px; padding: 0 6px;
        border-radius: 10px; background: #ff4d4f; color: #fff;
        font-size: 11px; line-height: 20px; text-align: center; font-weight: 600;
    }
    .folder .count { margin-left: auto; color: var(--text-3); font-size: 12px; }
    .sidebar-footer { margin-top: auto; border-top: 1px solid var(--border-light); padding-top: 12px; display: flex; flex-direction: column; gap: 3px; }

    /* ---------- 主内容区 ---------- */
    .mail-main { flex: 1; min-width: 0; background: #fff; display: flex; flex-direction: column; }

    /* ---------- 列表工具条 ---------- */
    .list-toolbar {
        display: flex; align-items: center; gap: 10px;
        padding: 10px 18px; border-bottom: 1px solid var(--border-light); background: #fff;
    }
    .tb-btn {
        display: inline-flex; align-items: center; gap: 6px;
        height: 30px; padding: 0 11px; border: 1px solid var(--border); border-radius: 6px;
        background: #fff; color: var(--text-2); font-size: 13px; cursor: pointer;
    }
    .tb-btn:hover { color: var(--primary); border-color: var(--primary); }
    .tb-btn.danger:hover { color: var(--danger); border-color: var(--danger); }
    .check-all { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-2); cursor: pointer; user-select: none; }
    .toolbar-spacer { flex: 1; }
    .page-info { font-size: 13px; color: var(--text-3); }

    /* ---------- 邮件列表 ---------- */
    .mail-list { flex: 1; overflow-y: auto; }
    .mail-row {
        display: flex; align-items: center; gap: 10px;
        padding: 0 18px; height: 54px; border-bottom: 1px solid var(--border-light);
        cursor: pointer; transition: background 0.08s;
        background: #fff;
    }
    .mail-row:not(.unread) { background: #fbfcfe; }
    .mail-row:hover { background: #f2f6ff; }
    .mail-row.selected { background: var(--primary-soft); }
    .cell-check { display: flex; align-items: center; }
    .cell-avatar { flex: 0 0 auto; }
    .cell-from {
        width: 150px; flex-shrink: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        font-size: 13.5px; color: var(--text-2);
    }
    .mail-row.unread .cell-from { color: var(--text); font-weight: 600; }
    .cell-subject-wrap { display: flex; align-items: center; gap: 7px; flex: 0 1 36%; min-width: 150px; }
    .unread-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--primary); flex-shrink: 0; }
    .cell-subject {
        overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        font-size: 13.5px; color: var(--text-2);
    }
    .mail-row.unread .cell-subject { color: var(--text); font-weight: 600; }
    .cell-snippet {
        flex: 1; min-width: 60px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        font-size: 12.5px; color: var(--text-3);
    }
    .cell-date {
        width: 78px; flex-shrink: 0; text-align: right;
        font-size: 12.5px; color: var(--text-3);
    }
    .mail-row.unread .cell-date { color: var(--text-2); }
    .row-del { opacity: 0; transition: opacity 0.12s; }
    .mail-row:hover .row-del { opacity: 1; }
    .empty-tip { padding: 90px 0; text-align: center; color: var(--text-3); font-size: 14px; }
    .empty-tip .empty-icon { font-size: 46px; display: block; margin-bottom: 14px; opacity: 0.5; }

    /* ---------- 列表底部分页 ---------- */
    .list-footer {
        display: flex; align-items: center; gap: 12px;
        padding: 10px 18px; border-top: 1px solid var(--border-light);
        font-size: 13px; color: var(--text-3); background: #fff;
    }
    .pager { margin-left: auto; display: flex; align-items: center; gap: 6px; }
    .page-btn {
        height: 28px; padding: 0 11px; border: 1px solid var(--border); border-radius: 6px;
        background: #fff; color: var(--text-2); font-size: 13px;
        display: inline-flex; align-items: center; gap: 4px;
    }
    .page-btn:hover:not(.disabled) { color: var(--primary); border-color: var(--primary); }
    .page-btn.disabled { opacity: 0.45; cursor: not-allowed; }
    .page-num { font-size: 13px; }

    /* ---------- 邮件阅读页 ---------- */
    .view-toolbar { display: flex; align-items: center; gap: 10px; padding: 10px 18px; border-bottom: 1px solid var(--border-light); }
    .mail-head { padding: 22px 28px 0; }
    .mail-title { font-size: 20px; font-weight: 600; line-height: 1.45; word-break: break-word; }
    .mail-from-row { display: flex; align-items: center; gap: 12px; margin: 16px 0 18px; }
    .mail-from-name { font-size: 14.5px; font-weight: 600; }
    .mail-from-addr { color: var(--text-3); font-size: 12.5px; }
    .mail-date { color: var(--text-3); font-size: 12.5px; margin-left: auto; }
    .mail-body-wrap { padding: 22px 28px; flex: 1; overflow: auto; }
    .mail-body { line-height: 1.7; font-size: 14.5px; }
    .mail-body pre { white-space: pre-wrap; font-family: inherit; }
    .mail-body-iframe {
        width: 100%; min-height: 340px; border: 1px solid var(--border-light);
        border-radius: 8px; background: #fff;
    }
    .attachment-list { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border-light); }
    .attachment-item {
        display: inline-flex; align-items: center; gap: 7px;
        margin: 0 12px 10px 0; padding: 7px 13px;
        background: #f2f3f5; border-radius: 7px; font-size: 13px; color: var(--text);
    }
    .attachment-item a { color: var(--text); }
    .attachment-item a:hover { color: var(--primary); }
    .view-actions { display: flex; align-items: center; gap: 10px; padding: 18px 28px 24px; }

    /* ---------- 写信页 ---------- */
    .compose-toolbar { display: flex; align-items: center; gap: 10px; padding: 10px 18px; border-bottom: 1px solid var(--border-light); }
    .compose-form { flex: 1; display: flex; flex-direction: column; min-height: 0; }
    .compose-field { display: flex; align-items: center; gap: 12px; padding: 9px 22px; border-bottom: 1px solid var(--border-light); }
    .compose-field label { width: 54px; color: var(--text-2); font-size: 13.5px; flex-shrink: 0; }
    .compose-field input { border: none; outline: none; flex: 1; font-size: 14px; color: var(--text); background: transparent; }
    .editor-wrap { flex: 1; display: flex; flex-direction: column; min-height: 0; }
    .editor-wrap .ql-toolbar { border-left: none; border-right: none; border-top: none; }
    .editor-wrap .ql-container { border: none; flex: 1; font-size: 14.5px; }
    #editor { height: 100%; }
    .attach-chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 22px; border-bottom: 1px solid var(--border-light); }
    .attach-chip {
        display: inline-flex; align-items: center; gap: 7px;
        padding: 5px 11px; background: #f2f3f5; border-radius: 15px;
        font-size: 12.5px; color: var(--text-2);
    }
    .attach-chip .chip-del { cursor: pointer; color: var(--text-3); border: none; background: none; font-size: 13px; line-height: 1; }
    .attach-chip .chip-del:hover { color: var(--danger); }
    .compose-footer {
        display: flex; align-items: center; gap: 14px;
        padding: 12px 22px; border-top: 1px solid var(--border-light);
        font-size: 12.5px; color: var(--text-3); background: #fafbfc;
    }
    .quota-bar { width: 200px; height: 6px; background: #eceef1; border-radius: 3px; overflow: hidden; }
    .quota-bar i { display: block; height: 100%; background: linear-gradient(90deg, #4aa3ff, var(--primary)); border-radius: 3px; }
    .quota-bar.warn i { background: linear-gradient(90deg, #ffc53d, var(--orange)); }
    .quota-bar.over i { background: var(--danger); }

    /* ---------- 登录页 ---------- */
    .login-page {
        min-height: 100vh; display: flex; align-items: center; justify-content: center;
        background: linear-gradient(165deg, #eaf2ff 0%, #f6f8fc 55%, #f0f6ff 100%);
    }
    .login-card {
        width: 400px; max-width: calc(100vw - 32px);
        background: #fff; border-radius: 14px;
        box-shadow: 0 10px 40px rgba(22, 119, 255, 0.10);
        padding: 42px 38px 36px;
    }
    .login-logo { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 8px; }
    .login-title { text-align: center; font-size: 21px; font-weight: 700; color: var(--text); margin-bottom: 26px; }
    .login-sub { text-align: center; color: var(--text-3); font-size: 13px; margin-bottom: 26px; }
    .divider { display: flex; align-items: center; gap: 10px; color: var(--text-3); font-size: 12.5px; margin: 18px 0; }
    .divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--border-light); }

    /* ---------- 通用组件（兼容管理后台） ---------- */
    .container { max-width: 1400px; margin: 20px auto; padding: 0 20px; }
    .card {
        background: #fff; border: 1px solid var(--border-light); border-radius: var(--radius);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04); padding: 20px; margin-bottom: 16px;
    }
    .btn {
        display: inline-block; padding: 8px 16px; border-radius: 6px; border: 1px solid transparent;
        text-decoration: none; font-size: 14px; cursor: pointer; text-align: center;
        background: #f2f3f5; color: var(--text); line-height: 1.4;
    }
    .btn-primary { background: var(--primary); color: #fff; }
    .btn-primary:hover { background: var(--primary-hover); }
    .btn-danger { background: var(--danger); color: #fff; }
    .btn-danger:hover { background: #d23b47; }
    .btn-sm { padding: 4px 10px; font-size: 12px; border-radius: 5px; }
    .alert { padding: 12px 16px; border-radius: 7px; margin-bottom: 16px; font-size: 13.5px; }
    .alert-error { background: var(--danger-soft); color: #c0392b; }
    .alert-success { background: var(--success-soft); color: #2e9e4f; }
    .form-group { margin-bottom: 16px; }
    .form-group label { display: block; margin-bottom: 7px; font-weight: 600; font-size: 13.5px; }
    .form-group input, .form-group textarea, .form-group select {
        width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px;
        font-size: 14px; outline: none; background: #fff; color: var(--text);
    }
    .form-group input:focus, .form-group textarea:focus, .form-group select:focus {
        border-color: var(--primary); box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.12);
    }
    .form-group input[type="checkbox"] { width: auto; }
    table { width: 100%; border-collapse: collapse; }
    th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border-light); font-size: 13.5px; }
    th { background: #f8f9fb; font-weight: 600; color: var(--text-2); }
    tbody tr:hover td { background: #fafbfc; }
    .unread { font-weight: bold; }
    .message-subject { color: var(--text); }
    .message-subject:hover { color: var(--primary); }
    .mail-meta { color: var(--text-2); font-size: 13px; margin-bottom: 10px; line-height: 1.9; }
    .pagination { margin-top: 16px; text-align: center; }
    .pagination a, .pagination span {
        display: inline-block; padding: 6px 12px; margin: 0 2px;
        border: 1px solid var(--border); border-radius: 6px; text-decoration: none;
        color: var(--text-2); font-size: 13px;
    }
    .pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }
    .badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: bold; }
    .badge-unread { background: #ff4d4f; color: #fff; }
    .stat-card {
        display: inline-block; width: 200px; padding: 20px; margin: 0 20px 16px 0;
        background: #fff; border: 1px solid var(--border-light); border-radius: var(--radius);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04); text-align: center;
    }
    .stat-card h3 { font-size: 30px; color: var(--primary); margin-bottom: 4px; }
    .stat-card p { color: var(--text-2); font-size: 13.5px; }
    .dns-record {
        background: #f8f9fb; padding: 12px 16px; border-radius: 6px; margin-bottom: 12px;
        font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
        font-size: 12.5px; white-space: pre-wrap;
    }
    .clearfix::after { content: ""; display: table; clear: both; }
    /* 管理后台左侧导航兼容 */
    .sidebar { width: 200px; float: left; background: #fff; border: 1px solid var(--border-light); border-radius: var(--radius); padding: 8px; }
    .sidebar a { display: block; padding: 9px 14px; color: var(--text-2); text-decoration: none; border-radius: 6px; margin-bottom: 2px; font-size: 13.5px; }
    .sidebar a:hover, .sidebar a.active { background: var(--primary-soft); color: var(--primary); }
    .content { margin-left: 220px; }
</style>
{{end}}

{{define "navbar"}}
{{if .currentUser}}
<header class="topbar">
    <div class="topbar-left">
        <a class="logo" href="/inbox">
            <span class="logo-icon">✉</span>
            <span class="logo-text">MailGo<em>邮箱</em></span>
        </a>
    </div>
    <div class="topbar-search">
        <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="11" cy="11" r="8"/><line x1="21" y1="21" x2="16.65" y2="16.65"/></svg>
        <input id="mail-search" type="text" placeholder="搜索邮件（发件人 / 主题）" autocomplete="off">
    </div>
    <div class="topbar-right">
        {{if .currentUser.IsAdmin}}<a class="topbar-link" href="/admin">管理后台</a>{{end}}
        <a class="topbar-link" href="/settings">设置</a>
        <span class="user-chip">
            <span class="avatar avatar-sm" style="{{avatarStyle .currentUser.Username}}">{{initial .currentUser.Username}}</span>
            <span class="user-email" title="{{.currentUser.Username}}@{{.currentUser.Domain.Name}}">{{.currentUser.Username}}@{{.currentUser.Domain.Name}}</span>
        </span>
        <form method="POST" action="/logout" class="logout-form">
            <button type="submit" class="icon-btn" title="退出登录">
                <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"/><polyline points="16 17 21 12 16 7"/><line x1="21" y1="12" x2="9" y2="12"/></svg>
            </button>
        </form>
    </div>
</header>
{{end}}
{{end}}

{{define "sidebar"}}
<aside class="mail-sidebar">
    <a href="/compose" class="compose-btn">
        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7"/><path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z"/></svg>
        写信
    </a>
    <nav class="folder-nav">
        <a class="folder {{if eq .activeFolder `inbox`}}active{{end}}" href="/inbox">
            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="22 12 16 12 14 15 10 15 8 12 2 12"/><path d="M5.45 5.11L2 12v6a2 2 0 0 0 2 2h16a2 2 0 0 0 2-2v-6l-3.45-6.89A2 2 0 0 0 16.76 4H7.24a2 2 0 0 0-1.79 1.11z"/></svg>
            收件箱
            {{if .inboxUnread}}<span class="badge">{{.inboxUnread}}</span>{{end}}
        </a>
        <a class="folder {{if eq .activeFolder `drafts`}}active{{end}}" href="/drafts">
            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><polyline points="14 2 14 8 20 8"/><line x1="16" y1="13" x2="8" y2="13"/><line x1="16" y1="17" x2="8" y2="17"/></svg>
            草稿箱
            {{if .draftsTotal}}<span class="count">{{.draftsTotal}}</span>{{end}}
        </a>
        <a class="folder {{if eq .activeFolder `sent`}}active{{end}}" href="/sent">
            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="22" y1="2" x2="11" y2="13"/><polygon points="22 2 15 22 11 13 2 9 22 2"/></svg>
            已发送
            {{if .sentTotal}}<span class="count">{{.sentTotal}}</span>{{end}}
        </a>
    </nav>
    <div class="sidebar-footer">
        {{if .currentUser.IsAdmin}}
        <a class="folder" href="/admin">
            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"/></svg>
            管理后台
        </a>
        {{end}}
    </div>
</aside>
{{end}}