@media (max-width: 768px) {
  .mail-app {
    height: calc(100dvh - 108px);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .folder-pane {
    display: block;
    padding: 10px 12px;
    border: 0;
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
    white-space: nowrap;
    overscroll-behavior-x: contain;
  }

  .compose-button {
    display: inline-flex;
    width: auto;
    align-items: center;
    padding: 10px 14px;
    margin-right: 8px;
  }

  .folder-pane #mailboxIdentity {
    display: inline-block;
    padding: 0 8px;
    font-size: 10px;
    max-width: 150px;
    vertical-align: middle;
  }

  .folder-pane nav {
    display: inline-flex;
    gap: 5px;
    vertical-align: middle;
  }

  .folder-pane nav button {
    flex: 0 0 auto;
    padding: 9px 10px;
  }

  .message-pane {
    grid-row: 2;
    min-height: 0;
  }

  .message-pane > header {
    height: auto;
    min-height: 56px;
    padding: 10px 12px;
    gap: 10px;
    flex-wrap: wrap;
  }

  .message-tools {
    width: 100%;
    justify-content: space-between;
  }

  .message-tools input {
    width: 100%;
    max-width: none;
  }

  .message-list {
    height: calc(100% - 56px);
  }

  .message-item {
    padding: 13px 14px;
  }

  .reader {
    display: none;
    position: fixed;
    inset: 108px 0 0;
    z-index: 30;
    background: #fff;
    padding: 18px 15px;
    overflow: auto;
  }

  .reader:has(.reader-head) {
    display: block;
  }

  .reader-head::before {
    content: "← Zurück";
    display: block;
    color: var(--color-primary);
    font-weight: 700;
    margin-bottom: 18px;
  }

  .reader-head {
    cursor: pointer;
  }

  .reader-head h2 {
    font-size: 21px;
  }

  .message-frame {
    min-height: calc(100dvh - 280px);
  }

  .compose-dialog,
  .mail-task-dialog {
    width: 100%;
    max-width: none;
    margin: auto 0 0;
    border-radius: 20px 20px 0 0;
    max-height: 92dvh;
    overflow: auto;
  }

  .compose-dialog form,
  .mail-task-dialog form {
    padding: 22px 16px calc(18px + env(safe-area-inset-bottom));
  }

  .compose-dialog textarea {
    min-height: 38dvh;
  }
}