:root {
    --bg: #f5f7fa;
    --surface: #ffffff;
    --text: #1a202c;
    --text-muted: #718096;
    --border: #e2e8f0;
    --primary: #3182ce;
    --primary-hover: #2b6cb0;
    --danger: #e53e3e;
    --danger-hover: #c53030;
    --success: #38a169;
    --warning: #d69e2e;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 15px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 28px;
    height: 60px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}
.nav-brand a {
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    font-size: 1.15rem;
    letter-spacing: -0.3px;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}
.nav-user {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.15s;
}
.nav-links a:hover {
    border-bottom-color: var(--primary);
}
.nav-links .btn-sm {
    padding: 5px 12px;
    font-size: 0.8rem;
}

.container {
    max-width: 1100px;
    margin: 32px auto;
    padding: 0 24px;
}

.auth-box {
    max-width: 400px;
    margin: 100px auto;
    padding: 36px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}
.auth-box h1 {
    margin-top: 0;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
    line-height: 1.4;
}
.btn:hover {
    background: var(--bg);
    border-color: #cbd5e0;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}
.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}
.btn-danger:hover {
    background: var(--danger-hover);
    border-color: var(--danger-hover);
}
.btn-sm {
    padding: 5px 12px;
    font-size: 0.8rem;
}

.form-group {
    margin-bottom: 18px;
}
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #4a5568;
}
.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    background: var(--surface);
    transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.12);
}
.form-group input:disabled {
    background: #edf2f7;
    color: var(--text-muted);
}
.form-check label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    cursor: pointer;
}
.form-check input[type="checkbox"] {
    width: auto;
    margin: 0;
}
.form-actions {
    margin-top: 24px;
    display: flex;
    gap: 10px;
}

.inline-form {
    display: inline;
}

.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}
.alert-error {
    background: #fed7d7;
    color: #c53030;
    border: 1px solid #feb2b2;
}
.alert-info {
    background: #bee3f8;
    color: #2b6cb0;
    border: 1px solid #90cdf4;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 12px;
}
.page-header h1 {
    margin: 0;
    font-size: 1.7rem;
    font-weight: 700;
    letter-spacing: -0.4px;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    font-size: 0.9rem;
}
.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.data-table th {
    background: #f7fafc;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
}
.data-table tbody tr:hover {
    background: #f7fafc;
}
.data-table tr:last-child td {
    border-bottom: none;
}
.data-table a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}
.data-table a:hover {
    text-decoration: underline;
}

.pill {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.pill-super_admin { background: #e9d8fd; color: #553c9a; }
.pill-admin { background: #bee3f8; color: #2b6cb0; }
.pill-user { background: #e2e8f0; color: #4a5568; }
.pill-active { background: #c6f6d5; color: #276749; }
.pill-inactive { background: #fed7d7; color: #c53030; }
.pill-shared { background: #fefcbf; color: #744210; }
.pill-personal { background: #bee3f8; color: #2b6cb0; }
.pill-system { background: #e2e8f0; color: #4a5568; }
.pill-owner { background: #e9d8fd; color: #553c9a; }
.pill-manager { background: #bee3f8; color: #2b6cb0; }
.pill-read_only { background: #fed7d7; color: #c53030; }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
    margin-top: 28px;
}
.stat-card {
    display: block;
    padding: 24px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-decoration: none;
    color: inherit;
    transition: transform 0.15s, box-shadow 0.15s;
    border: 1px solid transparent;
}
.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border);
}
.stat-card h3 {
    margin: 0 0 6px;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
}
.stat-card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.detail-card {
    background: var(--surface);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.detail-card h2 {
    margin-top: 0;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.detail-card h3 {
    margin-top: 24px;
    margin-bottom: 12px;
    font-size: 0.95rem;
    font-weight: 700;
}
.detail-card dl {
    margin: 0;
}
.detail-card dt {
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 14px;
    font-weight: 600;
    letter-spacing: 0.04em;
}
.detail-card dd {
    margin: 4px 0 0;
    font-weight: 500;
    font-size: 0.95rem;
}
.detail-card code {
    background: #edf2f7;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
    color: #2d3748;
    word-break: break-all;
}
.empty {
    color: var(--text-muted);
    font-style: italic;
}

/* Tabs */
.tab-nav {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 0;
}
.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: all 0.15s;
}
.tab-btn:hover {
    color: var(--primary);
}
.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}
.tab-panel {
    display: none;
}
.tab-panel.active {
    display: block;
}

/* Self indicator */
.self-badge {
    display: inline-block;
    margin-left: 6px;
    padding: 2px 8px;
    background: var(--primary);
    color: #fff;
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    vertical-align: middle;
}

@media (max-width: 768px) {
    .detail-grid { grid-template-columns: 1fr; }
    .navbar { flex-wrap: wrap; height: auto; padding: 10px 16px; gap: 8px; }
    .nav-links { gap: 12px; flex-wrap: wrap; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .tab-nav { overflow-x: auto; flex-wrap: nowrap; }
}

/* ---------- Webmail ---------- */
.webmail-layout {
    display: flex;
    max-width: 1200px;
    margin: 24px auto;
    padding: 0 24px;
    gap: 24px;
    min-height: calc(100vh - 108px);
}

.webmail-sidebar {
    width: 220px;
    flex-shrink: 0;
}

.sidebar-header {
    margin-bottom: 16px;
}

.btn-compose {
    width: 100%;
    justify-content: center;
}

.mailbox-selector {
    margin-bottom: 12px;
}

.mailbox-selector select {
    width: 100%;
    padding: 8px 10px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    font-size: 0.9rem;
    background: var(--surface);
}

.folder-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.folder-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    font-size: 0.95rem;
    transition: background 0.15s;
}

.folder-item:hover {
    background: var(--border);
}

.folder-item.active {
    background: var(--primary);
    color: #fff;
}

.folder-item.active .folder-count,
.folder-item.active .folder-unseen {
    color: rgba(255,255,255,0.85);
}

.folder-name {
    font-weight: 500;
}

.folder-count {
    margin-left: auto;
    margin-right: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.folder-unseen {
    background: var(--danger);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 999px;
}

.webmail-content {
    flex: 1;
    min-width: 0;
}

.content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.content-header h1 {
    margin: 0;
    font-size: 1.35rem;
}

.message-actions {
    gap: 12px;
}

.actions-right {
    display: flex;
    gap: 8px;
}

/* Message list */
.message-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.message-row {
    display: block;
    padding: 14px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.15s, transform 0.05s;
}

.message-row:hover {
    box-shadow: var(--shadow-lg);
}

.message-row.unseen {
    border-left: 4px solid var(--primary);
}

.message-row.unseen .message-from,
.message-row.unseen .message-subject {
    font-weight: 600;
}

.message-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
    font-size: 0.85rem;
}

.message-from {
    color: var(--text);
}

.message-date {
    color: var(--text-muted);
    white-space: nowrap;
}

.message-subject {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--text);
}
.trash-ttl {
    display: inline-block;
    margin-left: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg);
    padding: 2px 6px;
    border-radius: var(--radius);
}

.message-snippet {
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.flagged {
    color: #d69e2e;
    margin-right: 4px;
}

.answered {
    color: var(--primary);
    margin-right: 4px;
}

/* Star button in message list */
.star-form {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
}

.star-btn {
    background: none;
    border: none;
    cursor: pointer;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    line-height: 1;
    padding: 0;
    color: #a0aec0;
    transition: color 0.15s, transform 0.1s;
}

.star-btn::before {
    content: "★";
}

.star-btn:hover {
    color: #d69e2e;
    transform: scale(1.15);
}

.star-btn.starred {
    color: #d69e2e;
}

/* Starred text button in message detail */
.btn.starred {
    color: #d69e2e;
    border-color: #d69e2e;
}

.btn.starred:hover {
    background: #fffaf0;
}

/* Message detail */
.message-detail {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.message-detail-header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 16px;
    margin-bottom: 20px;
}

.message-detail-header h1 {
    margin: 0 0 12px;
    font-size: 1.25rem;
}

.message-detail-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.message-detail-meta strong {
    color: var(--text);
    display: inline-block;
    width: 50px;
}

.message-detail-body {
    line-height: 1.7;
}

.message-text {
    white-space: pre-wrap;
    word-break: break-word;
    font-family: inherit;
    margin: 0;
    color: var(--text);
    line-height: 1.7;
}

.message-html {
    word-break: break-word;
}

.message-attachments {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.message-attachments h3 {
    margin: 0 0 10px;
    font-size: 1rem;
}

.message-attachments ul {
    margin: 0;
    padding-left: 18px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Compose */
.compose-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 800px;
}

.compose-form .form-group input,
.compose-form .form-group textarea {
    width: 100%;
}

.compose-form textarea {
    resize: vertical;
    min-height: 200px;
    font-family: inherit;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .webmail-layout {
        flex-direction: column;
        margin: 16px auto;
        padding: 0 16px;
        gap: 16px;
    }
    .webmail-sidebar {
        width: 100%;
    }
    .folder-list {
        flex-direction: row;
        flex-wrap: wrap;
    }
    .message-detail {
        padding: 16px;
    }
    .compose-form {
        padding: 16px;
    }
}

/* ---------- User Menu Dropdown ---------- */
.user-menu {
    position: relative;
}

.user-menu-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 6px 14px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.user-menu-btn::after {
    content: "▼";
    font-size: 0.6rem;
    color: var(--text-muted);
}

.user-menu-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 6px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: 200;
    padding: 6px 0;
}

.user-menu-dropdown.show {
    display: block;
}

.user-menu-dropdown a,
.user-menu-dropdown button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 8px 16px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.9rem;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.user-menu-dropdown a:hover,
.user-menu-dropdown button:hover {
    background: var(--bg);
}

.menu-divider {
    height: 1px;
    background: var(--border);
    margin: 6px 12px;
}

.menu-logout button {
    color: var(--danger);
}

/* Close dropdown when clicking outside */
body:has(.user-menu-dropdown.show) .user-menu-btn:focus {
    outline: none;
}

/* ---------- Sidebar Accounts ---------- */
.sidebar-section {
    margin-bottom: 4px;
}

.sidebar-heading {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    padding: 0 12px;
    margin: 0 0 6px;
}

.sidebar-divider {
    height: 1px;
    background: var(--border);
    margin: 10px 0;
}

.account-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.account-item {
    display: flex;
    flex-direction: column;
    padding: 7px 12px;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    transition: background 0.15s;
}

.account-item:hover {
    background: var(--border);
}

.account-item.active {
    background: var(--primary);
    color: #fff;
}

.account-item.active .account-email {
    color: rgba(255,255,255,0.85);
}

.account-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--text-muted);
}

.account-item.active .account-label {
    color: rgba(255,255,255,0.7);
}

.account-email {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ---------- Action dropdown in tables ---------- */
.actions-cell {
    position: relative;
}

.action-dropdown {
    position: relative;
    display: inline-block;
}

.action-menu {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 4px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 140px;
    z-index: 150;
    padding: 4px 0;
}

.action-menu.show {
    display: block;
}

.action-menu a,
.action-menu button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 6px 12px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.85rem;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.action-menu a:hover,
.action-menu button:hover {
    background: var(--bg);
}

.action-menu button {
    color: var(--danger);
}