/* =====================================================================
   Roundcube Elastic-inspired skin for the Gmail client UI.
   Layout:
     ┌─────────────────────────────────────────────┐
     │ Top bar (blue, 48px)                        │
     ├──────────┬──────────────────────────────────┤
     │ Sidebar  │ Toolbar (40px)                   │
     │ (240px)  ├──────────────────────────────────┤
     │ folder   │ List header (sticky)             │
     │ tree     │ List rows (scroll)               │
     │          ├──────────────────────────────────┤
     │          │ Pager footer (34px)              │
     └──────────┴──────────────────────────────────┘
   ===================================================================== */

:root {
    --rcm-primary:        #37a;
    --rcm-primary-hover:  #285a91;
    --rcm-primary-dark:   #1f4775;
    --rcm-primary-soft:   #dde9f3;
    --rcm-link:           #1a5a96;
    --rcm-text:           #222;
    --rcm-text-muted:     #6c757d;
    --rcm-text-faint:     #999;
    --rcm-bg:             #fff;
    --rcm-bg-sidebar:     #f4f4f4;
    --rcm-bg-toolbar:     #f6f6f6;
    --rcm-bg-row-hover:   #ebf3fa;
    --rcm-bg-row-selected:#c8e1ee;
    --rcm-bg-row-unread:  #fafcfe;
    --rcm-border:         #d4dae3;
    --rcm-border-soft:    #e7e9ee;
    --rcm-topbar-bg:      #37a;
    --rcm-topbar-text:    #fff;
    --rcm-unread-text:    #1f4775;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
}

body.rcm {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 13px;
    line-height: 1.45;
    color: var(--rcm-text);
    background: var(--rcm-bg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

a:hover { color: var(--rcm-primary-hover); }

/* =====================================================================
   Top bar
   ===================================================================== */

.rcm-topbar {
    flex: 0 0 48px;
    display: flex;
    align-items: stretch;
    background: var(--rcm-topbar-bg);
    color: var(--rcm-topbar-text);
    box-shadow: 0 1px 2px rgba(0, 0, 0, .12);
    z-index: 100;
}

.rcm-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 18px 0 16px;
    color: #fff !important;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: .02em;
    text-decoration: none;
    background: rgba(0, 0, 0, .08);
}

.rcm-brand i { font-size: 18px; }
.rcm-brand:hover { color: rgba(255, 255, 255, .9) !important; }

.rcm-topnav {
    display: flex;
    align-items: stretch;
}

.rcm-topnav-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 16px;
    color: rgba(255, 255, 255, .85) !important;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: background-color .15s, color .15s, border-color .15s;
    font-size: 13px;
}

.rcm-topnav-item i { font-size: 15px; }

.rcm-topnav-item:hover {
    background-color: rgba(255, 255, 255, .1);
    color: #fff !important;
}

.rcm-topnav-item.is-active {
    background-color: rgba(0, 0, 0, .12);
    border-bottom-color: #fff;
    color: #fff !important;
    font-weight: 500;
}

.rcm-topbar-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    padding-right: 8px;
}

.rcm-icon-btn {
    background: transparent;
    border: 0;
    color: rgba(255, 255, 255, .85);
    width: 36px;
    height: 36px;
    border-radius: 4px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    padding: 0;
}

.rcm-icon-btn:hover {
    background: rgba(255, 255, 255, .15);
    color: #fff;
}

/* =====================================================================
   Body layout (sidebar + content)
   ===================================================================== */

.rcm-body {
    flex: 1 1 auto;
    display: flex;
    min-height: 0;
    overflow: hidden;
}

.rcm-content {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    background: var(--rcm-bg);
    overflow: hidden;
}

.rcm-content-padded {
    overflow-y: auto;
    padding: 1rem 1.5rem;
}

/* =====================================================================
   Sidebar (folder tree)
   ===================================================================== */

.rcm-sidebar {
    flex: 0 0 240px;
    background: var(--rcm-bg-sidebar);
    border-right: 1px solid var(--rcm-border);
    overflow-y: auto;
    padding-bottom: 1rem;
}

.rcm-compose-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 10px 12px 14px;
    padding: 8px 12px;
    background: var(--rcm-primary);
    color: #fff !important;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    font-size: 13px;
    transition: background-color .15s;
    box-shadow: 0 1px 1px rgba(0, 0, 0, .08);
}

.rcm-compose-btn:hover {
    background: var(--rcm-primary-hover);
    color: #fff !important;
}

.rcm-compose-btn i { font-size: 15px; }

.rcm-tree {
    padding: 0 6px;
}

.rcm-tree-group {
    margin-bottom: 10px;
}

.rcm-tree-account {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 8px 4px;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--rcm-text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    border-bottom: 1px solid var(--rcm-border-soft);
    margin-bottom: 2px;
}

.rcm-tree-account i { font-size: 13px; }

.rcm-tree-account-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-transform: none;
    letter-spacing: 0;
}

.rcm-tree-account.is-current {
    color: var(--rcm-primary);
    border-bottom-color: var(--rcm-primary);
}

.rcm-tree-action {
    margin: 0;
    display: inline-flex;
    align-items: center;
}

.rcm-icon-btn-sm {
    background: transparent;
    border: 0;
    color: var(--rcm-text-muted);
    width: 22px;
    height: 22px;
    border-radius: 3px;
    cursor: pointer;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    transition: background-color .12s, color .12s;
}

.rcm-icon-btn-sm:hover {
    background: rgba(0, 0, 0, .08);
    color: var(--rcm-primary);
}

@media (hover: hover) {
    .rcm-tree-action:not(.is-busy) {
        opacity: 0;
        transition: opacity .15s;
    }
    .rcm-tree-group:hover .rcm-tree-action,
    .rcm-tree-group:focus-within .rcm-tree-action {
        opacity: 1;
    }
    .rcm-tree-action.is-busy { opacity: 1; }
}

.rcm-tree-action.is-busy .rcm-icon-btn-sm {
    color: var(--rcm-primary);
}

.rcm-tree-action.is-busy .rcm-icon-btn-sm i {
    animation: rcm-spin 1s linear infinite;
}

@keyframes rcm-spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.rcm-folder {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 8px 5px 22px;
    color: var(--rcm-text) !important;
    text-decoration: none;
    border-radius: 3px;
    font-size: 13px;
    line-height: 1.4;
}

.rcm-folder i {
    flex-shrink: 0;
    font-size: 14px;
    color: var(--rcm-text-muted);
}

.rcm-folder:hover {
    background-color: var(--rcm-bg-row-hover);
    color: var(--rcm-text) !important;
}

.rcm-folder.is-active {
    background-color: var(--rcm-primary);
    color: #fff !important;
}

.rcm-folder.is-active i { color: #fff; }

.rcm-folder.is-active:hover {
    background-color: var(--rcm-primary-hover);
}

.rcm-folder-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.rcm-folder-count {
    background: rgba(0, 0, 0, .08);
    color: var(--rcm-text-muted);
    padding: 1px 7px;
    border-radius: 9px;
    font-size: 10.5px;
    font-weight: 700;
    min-width: 20px;
    text-align: center;
    line-height: 1.4;
}

.rcm-folder.is-active .rcm-folder-count {
    background: rgba(255, 255, 255, .28);
    color: #fff;
}

.rcm-sidebar-empty {
    padding: 1rem;
    color: var(--rcm-text-muted);
    font-size: 12px;
    text-align: center;
    line-height: 1.6;
}

/* =====================================================================
   Toolbar
   ===================================================================== */

.rcm-toolbar {
    flex: 0 0 40px;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 12px;
    background: var(--rcm-bg-toolbar);
    border-bottom: 1px solid var(--rcm-border);
}

.rcm-toolbar-group {
    display: flex;
    align-items: center;
    gap: 2px;
}

.rcm-tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0 10px;
    height: 28px;
    background: transparent;
    border: 1px solid transparent;
    color: var(--rcm-text);
    text-decoration: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 12.5px;
    transition: background-color .12s, border-color .12s, color .12s;
}

.rcm-tool-btn i { font-size: 14px; line-height: 1; }

.rcm-tool-btn:hover {
    background-color: rgba(0, 0, 0, .06);
    color: var(--rcm-text);
}

.rcm-tool-btn:disabled,
.rcm-tool-btn[disabled] {
    color: var(--rcm-text-faint);
    cursor: not-allowed;
    background: transparent;
}

.rcm-toolbar-title {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: var(--rcm-text);
}

.rcm-toolbar-title-main {
    font-weight: 600;
    font-size: 13.5px;
}

.rcm-toolbar-title-sep,
.rcm-toolbar-title-sub {
    color: var(--rcm-text-muted);
}

.rcm-toolbar-title-info {
    margin-left: 10px;
    color: var(--rcm-text-muted);
    font-size: 12px;
}

.rcm-toolbar-search {
    flex: 0 0 260px;
}

.rcm-search {
    display: flex;
    align-items: center;
    background: #fff;
    border: 1px solid var(--rcm-border);
    border-radius: 3px;
    padding: 0 8px;
    height: 28px;
    width: 100%;
}

.rcm-search:focus-within {
    border-color: var(--rcm-primary);
    box-shadow: 0 0 0 2px rgba(51, 119, 170, .15);
}

.rcm-search-icon {
    color: var(--rcm-text-faint);
    font-size: 14px;
    margin-right: 6px;
}

.rcm-search-input {
    flex: 1;
    border: 0;
    background: transparent;
    outline: 0;
    padding: 0;
    font-size: 13px;
    min-width: 0;
    color: var(--rcm-text);
}

.rcm-search-input::placeholder { color: var(--rcm-text-faint); }

.rcm-search-clear {
    color: var(--rcm-text-faint);
    text-decoration: none;
    padding: 2px 4px;
    font-size: 14px;
    line-height: 1;
}

.rcm-search-clear:hover { color: var(--rcm-text); }

/* =====================================================================
   Message list table (Roundcube columnar layout)
   ===================================================================== */

.rcm-list {
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 0;
    background: #fff;
}

.rcm-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    table-layout: fixed;
}

.rcm-table thead th {
    background: var(--rcm-bg-toolbar);
    border-bottom: 1px solid var(--rcm-border);
    color: var(--rcm-text-muted);
    text-align: left;
    font-weight: 600;
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: .04em;
    padding: 7px 10px;
    position: sticky;
    top: 0;
    z-index: 1;
}

.rcm-col-center { text-align: center; }
.rcm-col-right  { text-align: right; padding-right: 14px !important; }
.rcm-col-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.rcm-table tbody tr {
    border-bottom: 1px solid var(--rcm-border-soft);
}

.rcm-table tbody td {
    padding: 6px 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: middle;
    height: 30px;
    line-height: 1.3;
}

.rcm-row {
    cursor: pointer;
}

.rcm-row:hover {
    background-color: var(--rcm-bg-row-hover);
}

.rcm-row.is-unread {
    background-color: var(--rcm-bg-row-unread);
}

.rcm-row.is-unread td {
    color: var(--rcm-unread-text);
    font-weight: 600;
}

.rcm-row.is-unread .rcm-subject-link {
    color: var(--rcm-unread-text);
    font-weight: 600;
}

.rcm-subject-link {
    color: var(--rcm-text);
    text-decoration: none;
}

.rcm-subject-link:hover {
    color: var(--rcm-primary);
    text-decoration: underline;
}

.rcm-icon-read,
.rcm-table thead th i {
    color: var(--rcm-text-faint);
    font-size: 14px;
}

.rcm-icon-unread {
    color: var(--rcm-primary);
    font-size: 14px;
}

.rcm-col-date {
    color: var(--rcm-text-muted);
    font-size: 12px;
}

.rcm-row.is-unread .rcm-col-date {
    color: var(--rcm-unread-text);
}

.rcm-col-attach i {
    color: var(--rcm-text-muted);
    font-size: 13px;
}

.rcm-folder-tag {
    display: inline-block;
    margin-left: 6px;
    padding: 0 6px;
    background: var(--rcm-border-soft);
    color: var(--rcm-text-muted);
    border-radius: 2px;
    font-size: 11px;
    font-weight: 400;
    line-height: 1.6;
    vertical-align: middle;
}

.rcm-row-empty td {
    border-bottom: 0;
    background: transparent;
}

.rcm-row-empty:hover {
    background: transparent;
}

.rcm-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--rcm-text-muted);
}

.rcm-empty i {
    font-size: 2.5rem;
    color: var(--rcm-text-faint);
}

.rcm-empty-title {
    margin-top: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--rcm-text);
}

.rcm-empty-hint {
    margin-top: 4px;
    font-size: 12px;
}

/* =====================================================================
   Footer / pager
   ===================================================================== */

.rcm-footer {
    flex: 0 0 34px;
    display: flex;
    align-items: center;
    padding: 0 14px;
    background: var(--rcm-bg-toolbar);
    border-top: 1px solid var(--rcm-border);
    font-size: 12px;
    color: var(--rcm-text-muted);
}

.rcm-footer-left {
    flex: 1;
}

.rcm-footer-busy {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--rcm-primary);
}

.rcm-pager {
    display: flex;
    align-items: center;
    gap: 2px;
}

.rcm-pager-info {
    margin-right: 12px;
    color: var(--rcm-text-muted);
}

.rcm-pager-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 3px;
    color: var(--rcm-text) !important;
    text-decoration: none;
    font-size: 13px;
    transition: background-color .12s;
}

.rcm-pager-btn:hover {
    background-color: rgba(0, 0, 0, .06);
}

.rcm-pager-btn.is-disabled {
    color: var(--rcm-text-faint) !important;
    pointer-events: none;
}

/* =====================================================================
   Dropdown menu polish (Bootstrap dropdown used)
   ===================================================================== */

.dropdown-menu {
    font-size: 13px;
    min-width: 180px;
    border: 1px solid var(--rcm-border);
    border-radius: 4px;
    padding: 4px 0;
}

.dropdown-item {
    padding: 6px 14px;
    color: var(--rcm-text);
    display: flex;
    align-items: center;
}

.dropdown-item:hover {
    background-color: var(--rcm-bg-row-hover);
    color: var(--rcm-text);
}

.dropdown-item:disabled {
    color: var(--rcm-text-faint);
}

.dropdown-item form {
    margin: 0;
    width: 100%;
}

/* =====================================================================
   Non-mail pages (accounts / compose / sent / detail) - inherit Bootstrap
   look-and-feel but with Roundcube color accents
   ===================================================================== */

.rcm-content-padded .card {
    border: 1px solid var(--rcm-border);
    border-radius: 4px;
    box-shadow: none;
}

.rcm-content-padded .card-header {
    background: var(--rcm-bg-toolbar);
    border-bottom-color: var(--rcm-border);
    font-weight: 600;
    color: var(--rcm-text);
}

.rcm-content-padded .btn-primary {
    --bs-btn-bg: var(--rcm-primary);
    --bs-btn-border-color: var(--rcm-primary);
    --bs-btn-hover-bg: var(--rcm-primary-hover);
    --bs-btn-hover-border-color: var(--rcm-primary-hover);
    --bs-btn-active-bg: var(--rcm-primary-dark);
    --bs-btn-active-border-color: var(--rcm-primary-dark);
}

.rcm-content-padded .table {
    font-size: 13px;
}

.rcm-content-padded h2, .rcm-content-padded h3, .rcm-content-padded h4 {
    color: var(--rcm-text);
}

/* =====================================================================
   Message detail body (existing, kept and slightly themed)
   ===================================================================== */

.email-body {
    max-width: 100%;
    overflow-x: auto;
    word-wrap: break-word;
}

.email-body img {
    max-width: 100%;
    height: auto;
}

.email-body table {
    max-width: 100% !important;
}

.email-body pre {
    background: #f8f9fa;
    padding: .75rem;
    border-radius: 4px;
}

.email-body blockquote {
    border-left: 3px solid #dee2e6;
    padding-left: 1rem;
    color: #6c757d;
}

/* avatar reused on detail page */
.account-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.65rem;
    height: 1.65rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #93c5fd, var(--rcm-primary));
    color: #fff;
    font-size: .68rem;
    font-weight: 600;
    text-transform: uppercase;
    flex-shrink: 0;
}

/* =====================================================================
   Responsive
   ===================================================================== */

@media (max-width: 992px) {
    .rcm-sidebar { flex: 0 0 200px; }
    .rcm-toolbar-search { flex: 0 0 200px; }
}

@media (max-width: 768px) {
    .rcm-sidebar { flex: 0 0 180px; }
    .rcm-toolbar-title { display: none; }
    .rcm-toolbar-search { flex: 0 0 160px; }
    .rcm-table colgroup col:nth-child(3) { display: none; }
    .rcm-table thead th:nth-child(3),
    .rcm-table tbody td:nth-child(3) { display: none; }
}

@media (max-width: 576px) {
    .rcm-sidebar { display: none; }
    .rcm-topnav-item span { display: none; }
    .rcm-topnav-item { padding: 0 12px; }
    .rcm-table colgroup col:nth-child(4) { display: none; }
    .rcm-table thead th:nth-child(4),
    .rcm-table tbody td:nth-child(4) { display: none; }
}