:root {
  --bg: #f6f7f2;
  --surface: #ffffff;
  --surface-soft: #f0f4ef;
  --text: #151714;
  --muted: #667064;
  --line: #d9dfd5;
  --primary: #2f6f58;
  --primary-dark: #245744;
  --accent: #b45309;
  --danger: #a33d35;
  --focus: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

a {
  color: var(--primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: 28px;
  line-height: 1.2;
  margin-bottom: 8px;
}

h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 11px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(15, 118, 110, 0.18);
  border-color: var(--focus);
}

label {
  display: grid;
  gap: 6px;
  color: #2b302a;
  font-weight: 650;
}

label small {
  color: var(--muted);
  font-weight: 500;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

legend {
  padding: 0 6px;
  font-weight: 700;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: middle;
}

th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.topbar {
  min-height: 64px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  display: flex;
  align-items: center;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  color: var(--text);
  font-weight: 800;
  font-size: 18px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.nav a {
  border-radius: 6px;
  color: var(--muted);
  padding: 8px 10px;
}

.nav a.active,
.nav a:hover {
  background: var(--surface-soft);
  color: var(--text);
  text-decoration: none;
}

.session {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
}

.page {
  width: min(1400px, calc(100% - 32px));
  margin: 28px auto 64px;
}

.mailbox-picker-page {
  width: min(1500px, calc(100% - 32px));
}

.narrow {
  width: min(920px, calc(100% - 32px));
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(440px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 16px 40px rgba(21, 23, 20, 0.08);
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 18px;
}

.panel.subtle {
  background: #fbfcfa;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.two {
  grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.7fr);
}

.picker-grid {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
}

.message-grid {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  align-items: start;
}

.wide {
  min-width: 0;
}

.stack {
  display: grid;
  gap: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 14px;
  align-items: end;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.align-end {
  align-self: end;
}

.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 13px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-weight: 750;
  text-decoration: none;
  white-space: nowrap;
}

.button:hover,
button:hover {
  text-decoration: none;
  border-color: #b7c2b2;
}

.button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

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

.button.secondary {
  background: var(--surface-soft);
}

.button.danger {
  background: #fff6f4;
  border-color: #e4b8b3;
  color: var(--danger);
}

.link-button {
  min-height: auto;
  border: 0;
  background: transparent;
  color: var(--primary-dark);
  padding: 0;
}

.muted {
  color: var(--muted);
}

.flash {
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.flash.success {
  background: #ecf8f0;
  border-color: #b9dfc5;
  color: #14532d;
}

.flash.error {
  background: #fff1f0;
  border-color: #efb8b2;
  color: #7f1d1d;
}

.error-box {
  background: #1e1f1c;
  color: #f8fafc;
  border-radius: 8px;
  padding: 14px;
}

.table-wrap {
  overflow-x: auto;
}

.center {
  text-align: center;
}

.mailbox-list,
.admin-mailboxes,
.user-list {
  display: grid;
  gap: 12px;
}

.mailbox-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
}

.mailbox-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 170px;
  display: grid;
  grid-template-rows: 1fr auto;
  overflow: hidden;
}

.mailbox-card-main {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 18px;
  color: var(--text);
}

.mailbox-card-main:hover {
  background: #fbfcfa;
  text-decoration: none;
}

.mailbox-card-text {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.mailbox-card-text strong {
  font-size: 17px;
  overflow-wrap: anywhere;
}

.mailbox-card-text span {
  color: var(--muted);
  overflow-wrap: anywhere;
}

.mailbox-card-footer {
  border-top: 1px solid var(--line);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mailbox-avatar {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: #e0f0e7;
  color: #14532d;
  display: inline-grid;
  place-items: center;
  font-weight: 900;
}

.mailbox-avatar.large {
  width: 48px;
  height: 48px;
  flex: 0 0 auto;
}

.activity-panel {
  align-self: start;
  max-height: calc(100vh - 128px);
  overflow: auto;
}

.empty-state {
  display: grid;
  place-items: start;
  gap: 6px;
}

.empty-state.inline {
  border: 1px dashed var(--line);
  border-radius: 8px;
  margin: 12px;
  padding: 18px;
}

.mail-client-page {
  width: min(1800px, calc(100% - 20px));
  margin: 10px auto 24px;
}

.mail-shell {
  min-height: calc(100vh - 98px);
  display: grid;
  grid-template-columns: 280px minmax(360px, 0.85fr) minmax(420px, 1fr);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  overflow: hidden;
}

.message-shell {
  grid-template-columns: 280px minmax(520px, 1fr) minmax(360px, 440px);
}

.compose-shell {
  grid-template-columns: 280px minmax(0, 1fr);
}

.mail-sidebar,
.mail-list-pane,
.reading-pane,
.compose-pane,
.compose-workspace {
  min-width: 0;
  min-height: 0;
}

.mail-sidebar {
  background: #f2f5ef;
  border-right: 1px solid var(--line);
  padding: 14px;
  display: grid;
  align-content: start;
  gap: 16px;
}

.sidebar-back {
  width: 100%;
}

.mail-account {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  min-width: 0;
}

.mail-account h1 {
  font-size: 17px;
  margin: 0 0 4px;
  overflow-wrap: anywhere;
}

.mail-account p {
  margin: 0 0 8px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.folder-list {
  display: grid;
  gap: 6px;
}

.folder-list a {
  min-height: 40px;
  border-radius: 6px;
  padding: 9px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--text);
}

.folder-list a span {
  min-width: 0;
  display: grid;
  gap: 1px;
}

.folder-list a strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-list a small {
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-list a em {
  min-width: 24px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
  padding: 2px 7px;
  text-align: center;
}

.folder-list a.active,
.folder-list a:hover {
  background: #fff;
  text-decoration: none;
}

.sidebar-folder-form {
  display: grid;
}

.sidebar-folder-form input {
  width: 100%;
}

.sidebar-actions {
  display: grid;
  gap: 8px;
}

.mail-list-pane {
  border-right: 1px solid var(--line);
  background: #fff;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.mail-pane-header {
  min-height: 74px;
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mail-pane-header h2 {
  margin-bottom: 2px;
}

.mail-pane-header p {
  margin-bottom: 0;
}

.message-list {
  overflow: auto;
}

.message-row {
  min-height: 92px;
  border-bottom: 1px solid var(--line);
  padding: 12px 14px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  color: var(--text);
}

.message-row:hover {
  background: #f7faf6;
  text-decoration: none;
}

.message-row.unseen {
  background: #fffdf7;
}

.message-row.seen {
  color: #394138;
}

.message-row-content {
  min-width: 0;
  display: grid;
  gap: 3px;
}

.message-row-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.message-row-top strong,
.message-subject,
.message-meta-line {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-row.unseen .message-row-top strong,
.message-row.unseen .message-subject {
  font-weight: 900;
}

.message-row-top time,
.message-meta-line {
  color: var(--muted);
  font-size: 12px;
}

.message-subject {
  font-weight: 750;
}

.read-state {
  display: inline-flex;
  align-items: center;
  min-height: 20px;
  border-radius: 999px;
  padding: 1px 7px;
  margin-right: 6px;
  font-size: 11px;
  font-weight: 900;
}

.read-state.seen {
  background: #edf2ea;
  color: #586356;
}

.read-state.unseen {
  background: #fff2cc;
  color: #8a4b00;
}

.reading-pane {
  background: #fff;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.reading-placeholder {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 8px;
  text-align: center;
  padding: 32px;
  min-height: 260px;
}

.tracking-box {
  border-top: 1px solid var(--line);
  padding: 16px;
  overflow: auto;
}

.active-message {
  display: block;
  overflow: auto;
  padding: 0 18px 22px;
}

.message-read-header {
  border-bottom: 1px solid var(--line);
  padding: 18px 0 14px;
  margin-bottom: 16px;
}

.message-read-header h1 {
  font-size: 24px;
  overflow-wrap: anywhere;
}

.compose-pane {
  background: #fbfcfa;
  padding: 16px;
  overflow: auto;
}

.compose-pane > h2:not(:first-child) {
  margin-top: 24px;
}

.full-width {
  width: 100%;
}

.compose-workspace {
  background: #fff;
  overflow: auto;
  padding: 0 18px 22px;
}

.compose-form {
  display: grid;
  gap: 14px;
  max-width: 980px;
}

.compose-form textarea {
  min-height: 320px;
  resize: vertical;
}

.compose-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.user-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  grid-template-columns: minmax(160px, 1fr) minmax(180px, 1.2fr) 140px 100px minmax(160px, 1fr) auto;
  gap: 12px;
  align-items: end;
}

.field-label {
  display: block;
  color: var(--muted);
  font-weight: 750;
  margin-bottom: 6px;
}

.mailbox-row {
  min-height: 72px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
}

.mailbox-row strong,
.mailbox-row span {
  display: block;
  overflow-wrap: anywhere;
}

.badge {
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 12px;
  font-weight: 800;
}

.badge.shared {
  background: #ecf8f0;
  color: #166534;
}

.badge.personal {
  background: #fff7ed;
  color: #9a3412;
}

.row-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.split-title {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.folder-form {
  display: flex;
  gap: 8px;
  align-items: center;
}

.folder-form input {
  width: 160px;
}

.timeline {
  display: grid;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.timeline li {
  border-left: 3px solid var(--primary);
  padding-left: 10px;
}

.timeline span,
.timeline small {
  display: block;
  color: var(--muted);
}

.timeline.compact {
  gap: 8px;
}

.status-dot {
  display: inline-block;
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.status-dot.seen {
  background: #a8b2a2;
}

.status-dot.unseen {
  background: var(--accent);
}

.message-panel,
.side-panel {
  margin-bottom: 0;
}

.message-meta {
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
}

.message-meta div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 10px;
}

.message-meta dt {
  color: var(--muted);
  font-weight: 800;
}

.message-meta dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.attachments {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
  margin-bottom: 18px;
}

.attachment {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  margin-top: 8px;
}

.email-body {
  overflow-wrap: anywhere;
}

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

.email-body table {
  min-width: 0;
  max-width: 100%;
}

@media (max-width: 980px) {
  .topbar,
  .page-header,
  .split-title,
  .session {
    align-items: stretch;
    flex-direction: column;
  }

  .nav,
  .row-actions,
  .folder-form {
    flex-wrap: wrap;
  }

  .grid.two,
  .picker-grid,
  .message-grid {
    grid-template-columns: 1fr;
  }

  .mail-shell,
  .message-shell,
  .compose-shell {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .mail-sidebar,
  .mail-list-pane {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .mailbox-card-footer,
  .message-row-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .mailbox-row {
    grid-template-columns: 1fr;
  }

  .user-row {
    grid-template-columns: 1fr;
  }
}