* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: #f5f5f5; color: #333; line-height: 1.5; }
.container { max-width: 1400px; margin: 0 auto; padding: 20px; }
.top-bar { background: #2c3e50; color: white; padding: 12px 24px; display: flex; justify-content: space-between; align-items: center; }
.top-bar .logo { font-size: 1.3em; font-weight: bold; }
.user-info { display: flex; align-items: center; gap: 15px; }
.btn { display: inline-block; padding: 8px 16px; background: #ecf0f1; color: #333; text-decoration: none; border: none; border-radius: 4px; cursor: pointer; font-size: 14px; }
.btn:hover { background: #bdc3c7; }
.btn-primary { background: #3498db; color: white; }
.btn-primary:hover { background: #2980b9; }
.btn-danger { background: #e74c3c; color: white; }
.btn-small { padding: 5px 10px; font-size: 13px; }
.btn-block { display: block; width: 100%; text-align: center; margin-bottom: 15px; }
.btn-icon { background: none; border: none; cursor: pointer; font-size: 16px; padding: 4px 8px; text-decoration: none; color: #666; }
.restore-btn:hover { color: #27ae60; }
.alert { padding: 12px 20px; margin: 15px 20px; border-radius: 4px; }
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.login-container { display: flex; justify-content: center; align-items: center; min-height: calc(100vh - 100px); }
.login-box { background: white; padding: 40px; border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); width: 100%; max-width: 400px; }
.login-box h1 { text-align: center; margin-bottom: 10px; color: #2c3e50; }
.login-box .subtitle { text-align: center; color: #7f8c8d; margin-bottom: 30px; }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group textarea { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: #3498db; }
.server-info { margin-top: 20px; text-align: center; color: #95a5a6; }
.mail-layout { display: grid; grid-template-columns: 240px 1fr; gap: 20px; }
.sidebar { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); height: fit-content; }
.folders h3 { margin: 20px 0 10px; font-size: 14px; color: #7f8c8d; text-transform: uppercase; }
.folders ul { list-style: none; }
.folders li a { display: flex; align-items: center; gap: 10px; padding: 8px 12px; color: #333; text-decoration: none; border-radius: 4px; }
.folders li a:hover { background: #ecf0f1; }
.folders li.active a { background: #3498db; color: white; }
.mail-list-container { background: white; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); overflow: hidden; }
.mail-list-header { padding: 15px 20px; border-bottom: 1px solid #ecf0f1; }
.mail-list-toolbar { display: flex; gap: 10px; align-items: center; margin-top: 10px; flex-wrap: wrap; }
.search-form { display: flex; gap: 5px; flex: 1; min-width: 200px; }
.search-input { flex: 1; padding: 6px 10px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; }
.search-input:focus { outline: none; border-color: #3498db; }
.mail-item { display: grid; grid-template-columns: 30px 1fr auto auto; gap: 15px; padding: 12px 20px; border-bottom: 1px solid #ecf0f1; align-items: center; }
.mail-item:hover { background: #f8f9fa; }
.mail-item.unread { background: #eef6ff; font-weight: 600; }
.mail-link { text-decoration: none; color: inherit; display: block; overflow: hidden; }
.mail-from { font-size: 14px; margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mail-subject { font-size: 13px; color: #555; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mail-item-date { font-size: 12px; color: #7f8c8d; white-space: nowrap; }
.mail-item-content { min-width: 0; overflow: hidden; }
.mail-item-actions { display: flex; gap: 4px; }
.empty-state { padding: 60px 20px; text-align: center; color: #95a5a6; }
.pagination { display: flex; justify-content: center; align-items: center; gap: 15px; padding: 15px; border-top: 1px solid #ecf0f1; }
.page-info { color: #7f8c8d; font-size: 14px; }
.mail-read { background: white; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); padding: 20px; }
.mail-actions-bar { display: flex; gap: 10px; margin-bottom: 20px; padding-bottom: 15px; border-bottom: 1px solid #ecf0f1; }
.mail-header h1 { font-size: 22px; margin-bottom: 15px; }
.mail-meta { background: #f8f9fa; padding: 15px; border-radius: 4px; margin-bottom: 20px; }
.meta-row { padding: 4px 0; font-size: 14px; }
.meta-row strong { display: inline-block; width: 60px; color: #7f8c8d; }
.attachments { margin-bottom: 20px; }
.attachment-list { display: flex; flex-wrap: wrap; gap: 10px; }
.attachment-item { display: flex; align-items: center; gap: 8px; padding: 8px 12px; background: #ecf0f1; border-radius: 4px; text-decoration: none; color: #333; font-size: 13px; }
.att-size { color: #7f8c8d; font-size: 12px; }
.mail-body { padding: 20px; border-top: 1px solid #ecf0f1; line-height: 1.6; overflow-x: auto; }
.compose-container { background: white; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); padding: 25px; max-width: 900px; margin: 0 auto; }
.form-actions { display: flex; gap: 10px; margin-top: 20px; padding-top: 20px; border-top: 1px solid #ecf0f1; }
.checkbox-inline { display: flex; align-items: center; gap: 8px; font-weight: normal !important; margin-bottom: 5px; }
@media (max-width: 768px) {
    .container { padding: 10px; }
    .top-bar { flex-wrap: wrap; gap: 8px; padding: 10px 12px; }
    .top-bar .logo { font-size: 1.1em; }
    .user-info { width: 100%; justify-content: space-between; font-size: 13px; }
    .user-info .email { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 60%; }
    .mail-layout { grid-template-columns: 1fr; }
    .sidebar { order: -1; }
    .sidebar .btn-block { margin-bottom: 10px; }
    .folders ul { display: flex; flex-wrap: wrap; gap: 4px; }
    .folders li a { padding: 6px 10px; font-size: 13px; }
    .mail-list-toolbar { flex-direction: column; align-items: stretch; }
    .search-form { min-width: 0; }
    .mail-item { grid-template-columns: 24px 1fr auto; gap: 8px; padding: 10px 12px; }
    .mail-item-date { grid-column: 2 / 4; text-align: right; font-size: 11px; }
    .mail-item-actions { grid-column: 3; grid-row: 1; }
    .mail-from { font-size: 13px; }
    .mail-subject { font-size: 12px; }
    .mail-read { padding: 12px; }
    .mail-actions-bar { flex-wrap: wrap; gap: 6px; }
    .mail-actions-bar .btn { font-size: 12px; padding: 5px 8px; }
    .mail-header h1 { font-size: 18px; }
    .mail-meta { padding: 10px; }
    .meta-row { font-size: 13px; }
    .meta-row strong { width: 40px; }
    .compose-container { padding: 15px; }
    .form-group textarea { min-height: 120px; }
    .login-box { padding: 25px; }
    .attachments h3 { font-size: 14px; }
    .attachment-item { font-size: 12px; padding: 6px 10px; }
    .mail-body { padding: 12px; font-size: 14px; }
    .alert { margin: 10px; padding: 10px 14px; font-size: 13px; }
    .empty-state { padding: 30px 10px; }
    .pagination { gap: 10px; padding: 10px; }
}

@media (max-width: 480px) {
    .container { padding: 6px; }
    .top-bar { padding: 8px 10px; }
    .top-bar .logo { font-size: 1em; }
    .user-info { font-size: 12px; }
    .user-info .email { max-width: 55%; }
    .login-box { padding: 20px 15px; }
    .login-box h1 { font-size: 1.3em; }
    .compose-container { padding: 10px; }
    .form-actions { flex-direction: column; }
    .form-actions .btn { width: 100%; text-align: center; }
    .mail-item { grid-template-columns: 20px 1fr auto; gap: 6px; padding: 8px 10px; }
    .mail-item-actions .btn-icon { font-size: 14px; padding: 2px 6px; }
    .mail-header h1 { font-size: 16px; }
    .mail-read { padding: 8px; }
    .mail-body { padding: 8px; font-size: 13px; }
    .folders h3 { font-size: 12px; margin: 10px 0 6px; }
    .folders li a { font-size: 12px; padding: 5px 8px; }
    .pagination .btn { font-size: 12px; padding: 4px 8px; }
}