:root {
  --bg: #f6f8fc;
  --panel: #ffffff;
  --line: #dde3ea;
  --line-soft: #edf1f6;
  --ink: #1f1f1f;
  --muted: #5f6368;
  --accent: #0b57d0;
  --accent-soft: #e8f0fe;
  --sidebar: #f8fafd;
  --danger: #b3261e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px minmax(340px, 420px) minmax(420px, 1fr);
}

.login-modal,
.compose-modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.login-modal {
  z-index: 20;
  background: rgba(232, 237, 243, 0.82);
  backdrop-filter: blur(10px);
}

.compose-modal {
  z-index: 25;
  background: rgba(32, 33, 36, 0.3);
}

.login-modal.hidden,
.compose-modal.hidden,
#mail-view.hidden,
.contacts-view.hidden,
.saved-accounts.hidden,
.settings-panel.hidden {
  display: none;
}

.login-dialog,
.compose-dialog {
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 30px 90px rgba(60, 64, 67, 0.18);
}

.login-dialog {
  width: min(460px, 100%);
  border-radius: 28px;
  padding: 1.4rem;
}

.compose-dialog {
  width: min(760px, 100%);
  max-height: calc(100vh - 3rem);
  overflow: auto;
  border-radius: 24px;
  padding: 1rem;
}

.compose-editor-wrap {
  margin-bottom: 0.8rem;
}

.compose-toolbar {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.compose-editor {
  min-height: 220px;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  outline: none;
  line-height: 1.5;
}

.compose-editor:empty::before {
  content: attr(data-placeholder);
  color: var(--muted);
}

.compose-editor img {
  max-width: 100%;
  height: auto;
}

.login-brand {
  margin-bottom: 1rem;
}

.login-form,
.compose-form,
.contact-form {
  display: grid;
  gap: 0.15rem;
}

.saved-accounts {
  margin-bottom: 0.8rem;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  overflow: hidden;
}

.saved-head {
  padding: 0.8rem 0.9rem;
  background: #f8fbff;
  border-bottom: 1px solid var(--line-soft);
}

.saved-accounts-list {
  display: grid;
}

.saved-account-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  padding: 0.7rem;
  border-bottom: 1px solid var(--line-soft);
}

.saved-account-item:last-child {
  border-bottom: 0;
}

.saved-account-use,
.saved-account-delete {
  width: auto;
}

.saved-account-use {
  background: transparent;
  color: var(--ink);
  text-align: left;
  padding: 0.2rem;
}

.saved-account-use strong,
.saved-account-use span,
.contact-copy strong,
.contact-copy span {
  display: block;
}

.saved-account-use span,
.contact-copy span {
  color: var(--muted);
  font-size: 0.8rem;
}

.saved-account-delete {
  align-self: center;
  background: #fff;
  color: var(--danger);
  border: 1px solid var(--line);
}

.settings-panel {
  margin: 0.4rem 0 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line-soft);
}

.sidebar,
.mail-column,
.viewer-column {
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--line);
  padding: 1rem;
}

.mail-column {
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}

.viewer-column {
  background: #fff;
  display: flex;
  flex-direction: column;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.brand h1,
.brand p {
  margin: 0;
}

.brand p {
  color: var(--muted);
  font-size: 0.8rem;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
}

h1,
h2 {
  margin-top: 0;
  font-weight: 600;
}

label {
  display: block;
  margin-bottom: 0.7rem;
  font-size: 0.88rem;
  color: var(--muted);
}

input,
button,
textarea {
  width: 100%;
  margin-top: 0.3rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.68rem 0.78rem;
  font: inherit;
  background: #fff;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(11, 87, 208, 0.15);
  border-color: var(--accent);
}

button {
  cursor: pointer;
  background: var(--accent);
  color: white;
  border: 0;
  font-weight: 600;
}

.secondary-button {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  width: auto;
}

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

.compact-button {
  padding: 0.5rem 0.72rem;
  font-size: 0.83rem;
}

.topbar,
.viewer-header {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--line-soft);
}

.topbar p,
.viewer-header p {
  margin: 0.2rem 0 0;
}

.topbar-main,
.viewer-titlebar,
.folder-head,
.viewer-envelope {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.toolbar-actions,
.viewer-actions {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.folder-card,
.contact-form {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0.8rem;
  margin-bottom: 0.8rem;
}

.sidebar-actions {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 0.8rem;
}

.sidebar-actions .secondary-button,
.sidebar-actions button:not(.secondary-button) {
  width: 100%;
  text-align: left;
}

.full-width {
  width: 100%;
}

.mailboxes-nav {
  display: grid;
  gap: 0.2rem;
}

.mailbox-item {
  background: transparent;
  color: var(--ink);
  border: 0;
  display: grid;
  gap: 0.04rem;
  text-align: left;
  padding: 0.62rem 0.7rem;
  border-radius: 12px;
}

.mailbox-item:hover {
  background: #eef3fb;
}

.mailbox-item.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.mailbox-label {
  font-size: 0.88rem;
  font-weight: 600;
}

.mailbox-path {
  font-size: 0.75rem;
  color: var(--muted);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.checkbox input {
  width: auto;
  margin: 0;
}

.checkbox,
.checkbox input {
  accent-color: var(--accent);
}

.smtp-advanced {
  margin: 0.8rem 0;
  padding-top: 0.4rem;
  border-top: 1px solid var(--line-soft);
}

.smtp-advanced summary {
  cursor: pointer;
  color: var(--muted);
  margin-bottom: 0.8rem;
}

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

.status {
  font-size: 0.82rem;
}

.status.ok {
  color: #137333;
}

.status.error {
  color: var(--danger);
}

.mail-view {
  min-height: 0;
  flex: 1;
}

.messages {
  display: grid;
  gap: 0;
  max-height: calc(100vh - 72px);
  overflow: auto;
}

.messages.empty,
.viewer.empty,
.contacts-list.empty {
  color: var(--muted);
  padding: 1rem;
}

.message-item {
  text-align: left;
  background: #fff;
  color: var(--ink);
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  border-radius: 0;
  padding: 0.78rem 0.9rem;
}

.message-item:hover {
  background: #f8fbff;
}

.message-item.active {
  background: var(--accent-soft);
}

.message-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.2rem;
}

.message-line strong {
  font-size: 0.88rem;
}

.message-line time,
.message-preview {
  color: var(--muted);
  font-size: 0.8rem;
}

.message-subject {
  font-size: 0.85rem;
  margin-bottom: 0.2rem;
}

.contacts-view {
  display: grid;
  grid-template-columns: 300px 1fr;
  flex: 1;
  min-height: 0;
}

.contacts-panel,
.contacts-list-panel {
  padding: 0.9rem;
}

.contacts-panel {
  border-right: 1px solid var(--line-soft);
}

.contacts-list {
  display: grid;
  gap: 0.75rem;
}

.contact-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  padding: 0.8rem 0.9rem;
}

.contact-actions {
  grid-column: 2;
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  margin-top: 0.3rem;
}

.person-chip {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.avatar.small {
  width: 34px;
  height: 34px;
  font-size: 0.85rem;
}

.person-chip p,
.viewer-meta-block p {
  margin: 0.2rem 0 0;
}

.viewer-meta-block span:first-child,
.compose-from span {
  color: var(--muted);
}

.viewer-html,
.viewer-text {
  overflow: auto;
  margin: 0.8rem 1rem 0;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  padding: 1rem;
  line-height: 1.5;
}

.viewer-html {
  flex: 1;
}

.viewer-html.empty,
.viewer-text.empty {
  color: var(--muted);
}

.viewer-html iframe,
.viewer-html img {
  max-width: 100%;
}

.viewer-text {
  white-space: pre-wrap;
  min-height: 120px;
  max-height: 200px;
}

.compose-from {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  margin-bottom: 0.5rem;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar,
  .mail-column,
  .viewer-column {
    min-height: auto;
  }

  .messages {
    max-height: none;
  }

  .contacts-view {
    grid-template-columns: 1fr;
  }

  .contacts-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .topbar-main,
  .viewer-titlebar,
  .viewer-envelope {
    flex-direction: column;
    align-items: stretch;
  }
}