:root {
  --paper: #F6F5F0;
  --ink: #202A22;
  --ink-soft: #5B655C;
  --moss: #3F6B4A;
  --moss-deep: #2E4F37;
  --line: #DBD7CB;
  --clay: #B4713A;
  --danger: #A6432F;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --serif: 'Fraunces', 'Iowan Old Style', Georgia, serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.6;
}

.hidden { display: none !important; }

.pwa-install {
  position: fixed;
  z-index: 1000;
  bottom: max(16px, env(safe-area-inset-bottom));
  right: max(16px, env(safe-area-inset-right));
  left: max(16px, env(safe-area-inset-left));
  width: 400px;
  max-width: calc(100% - 32px);
  margin-left: auto;
  max-height: 70vh;
  max-height: 70dvh;
  overflow-y: auto;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 4px 24px #202a2226;
}
.pwa-install h2 { margin: 0 0 8px; font-size: 16px; line-height: 1.5; }
.pwa-install p { margin: 0; font-size: 13px; }
.pwa-install .pwa-install-platform { margin: 14px 0 8px; color: var(--moss-deep); font-weight: 600; }
.pwa-install ol { margin: 0; padding-left: 24px; font-size: 13px; }
.pwa-install li + li { margin-top: 8px; }
.pwa-install-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 16px; }
.pwa-install-actions > * { min-height: 44px; }
.pwa-guide-link { color: var(--moss-deep); text-decoration: underline; }
.pwa-install-actions .pwa-guide-link { display: inline-flex; align-items: center; font-size: 13px; }
.install-manual { max-width: 760px; margin: 32px auto; padding: 0 24px 40px; }
.install-manual section { padding: 20px 0; border-bottom: 1px solid var(--line); }
.install-manual h1 { font-size: 24px; }
.install-manual h2 { font-size: 19px; }
.install-manual li + li { margin-top: 10px; }
.pwa-offline {
  position: sticky;
  top: 0;
  z-index: 999;
  margin: 0;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  text-align: center;
}

.wordmark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 0 0 28px 0;
  color: var(--moss-deep);
}

/* --- ログイン前ゲート画面 --- */
.gate {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.gate-inner {
  max-width: 420px;
  text-align: left;
  border-left: 3px solid var(--moss);
  padding-left: 24px;
}
.gate-copy {
  color: var(--ink-soft);
  margin-bottom: 28px;
}

/* --- アプリ全体レイアウト --- */
.app {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

.side {
  border-right: 1px solid var(--line);
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
}

.nav-item {
  text-align: left;
  background: none;
  border: none;
  font-family: var(--sans);
  font-size: 14.5px;
  padding: 10px 10px;
  margin-bottom: 2px;
  border-radius: 4px;
  color: var(--ink-soft);
  cursor: pointer;
}
.nav-item:hover { background: rgba(63,107,74,0.08); color: var(--ink); }
.nav-item.is-active { background: rgba(63,107,74,0.12); color: var(--moss-deep); font-weight: 500; }
.nav-item--quiet { margin-top: auto; color: #96897d; font-size: 13px; }

.main {
  padding: 48px 56px;
}

.panel { display: none; max-width: 780px; }
.panel.is-active { display: block; }
.panel#panel-inbox.is-active { max-width: 1100px; }

.panel-head { margin-bottom: 32px; }
.panel-head h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 28px;
  margin: 0 0 8px 0;
}
.panel-sub { color: var(--ink-soft); margin: 0; max-width: 62ch; }

/* --- ボタン --- */
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary { background: var(--moss); color: #fff; }
.btn-primary:hover { background: var(--moss-deep); }
.btn-secondary { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-secondary:hover { border-color: var(--moss); color: var(--moss-deep); }
.filter-toggle[aria-pressed="true"], .filter-toggle[aria-expanded="true"] {
  background: rgba(63,107,74,0.12);
  border-color: var(--moss);
  color: var(--moss-deep);
  font-weight: 600;
}
.btn-danger-text {
  background: none; border: none; color: var(--danger); cursor: pointer;
  font-family: var(--sans); font-size: 13px; padding: 4px 8px;
}

/* --- フォーム --- */
.rule-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13.5px;
  color: var(--ink-soft);
  margin-bottom: 16px;
}
.rule-form input[type=text],
.rule-form input[type=email],
.rule-form input[type=number],
.rule-form select,
.rule-form textarea,
.inline-form input {
  font-family: var(--sans);
  font-size: 14.5px;
  color: var(--ink);
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
}
.rule-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 24px;
}
.rule-form textarea { font-family: var(--sans); resize: vertical; }
.compose-form { margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }

.panel-head--row { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; }

/* --- タブ・検索 --- */
.mail-tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--line); }
.mail-tab {
  background: none; border: none; cursor: pointer;
  font-family: var(--sans); font-size: 14px; color: var(--ink-soft);
  padding: 10px 4px; margin-right: 20px;
  border-bottom: 2px solid transparent;
  transform: translateY(1px);
}
.mail-tab:hover { color: var(--ink); }
.mail-tab.is-active { color: var(--moss-deep); border-bottom-color: var(--moss); font-weight: 500; }

.search-form { display: block; margin-bottom: 24px; }
.search-main-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.search-main-row > input[type=text] { flex: 1; min-width: 220px; max-width: 440px; }
.advanced-search {
  display: grid;
  grid-template-columns: repeat(3, minmax(160px, 1fr));
  gap: 12px 18px;
  margin-top: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: rgba(255,255,255,0.45);
}
.advanced-search label { display: flex; flex-direction: column; gap: 5px; color: var(--ink-soft); font-size: 12.5px; }
.advanced-search input, .advanced-search select {
  width: 100%; min-width: 0; padding: 8px 9px; border: 1px solid var(--line); border-radius: 4px;
  background: #fff; color: var(--ink); font-family: var(--sans); font-size: 13.5px;
}
.advanced-search .attachment-search { flex-direction: row; align-items: center; align-self: end; min-height: 36px; color: var(--ink); }
.advanced-search .attachment-search input { width: auto; }
.size-search-row { display: grid; grid-template-columns: auto 1fr auto; gap: 6px; }

/* --- 一覧＋プレビューの2カラムレイアウト --- */
.mail-split {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 40px;
  align-items: start;
}
.mail-list-col { min-width: 0; }
.bulk-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 38px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
}
.bulk-select-all { display: flex; align-items: center; gap: 5px; cursor: pointer; }
.bulk-select-all input { width: auto; }
.selected-count { color: var(--ink-soft); }
.bulk-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 3px; }
.mail-detail-col {
  border-left: 1px solid var(--line);
  padding-left: 40px;
  padding-right: 8px;
  min-width: 0;
  position: sticky;
  top: 24px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-margin-top: 24px;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
}
.page-info { font-size: 13px; color: var(--ink-soft); }

.message-row { cursor: pointer; }
.message-row:hover .message-subject { color: var(--moss-deep); }

.thread-subject {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 24px;
  margin: 20px 0 24px 0;
}
.thread-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 20px 0 24px;
}
.thread-title-row .thread-subject { margin: 0; }
.thread-title-row .btn { flex: 0 0 auto; }
.thread-messages { margin-bottom: 8px; }
.thread-message {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.thread-message:first-child { padding-top: 0; }
.thread-message-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}
.thread-message-meta { display: flex; align-items: center; gap: 10px; }
.message-response-actions { display: flex; gap: 5px; margin-top: 8px; }
.message-response-actions button {
  border: 0;
  background: none;
  padding: 2px 0;
  margin-right: 10px;
  color: var(--moss-deep);
  font-size: 12.5px;
  cursor: pointer;
}
.message-response-actions button:hover { text-decoration: underline; }
.response-context { margin: 0 0 12px; color: var(--ink-soft); font-size: 13px; }
.thread-message-from { color: var(--ink); font-weight: 500; }
.thread-message-body {
  white-space: pre-wrap;
  font-size: 14.5px;
  line-height: 1.7;
}
.thread-message-preview {
  display: block;
  width: 100%;
  min-height: 240px;
  border: 0;
  background: #fff;
}
.checkline {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
}
.checkline input { width: auto; }

.rule-divider {
  margin: 32px 0 18px 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-soft);
}

.rule-form-actions { display: flex; align-items: center; gap: 14px; margin-top: 8px; }
.form-msg { font-size: 13px; color: var(--ink-soft); }
.form-msg.error { color: var(--danger); }
.form-msg.success { color: var(--moss-deep); }

.inline-form { display: flex; gap: 10px; align-items: center; }
.inline-form input { flex: 1; max-width: 360px; }

/* --- 一覧表示（フラットな罫線区切り、カード＋シャドウは使わない） --- */
.filter-list, .message-list, .folder-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.filter-row, .folder-row {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}
.filter-row:first-child { padding-top: 0; }
.message-row {
  display: block;
  min-width: 0;
  position: relative;
  margin: 0 -12px;
  padding: 14px 12px;
  border-left: 4px solid transparent;
  border-bottom: 1px solid var(--line);
  border-radius: 0 6px 6px 0;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}
.message-row:hover { background: rgba(63,107,74,0.06); }
.message-select { position: absolute; left: 12px; top: 17px; width: auto; }
.message-row .message-main { padding-left: 26px; }
.message-row[data-draft-id] .message-main { padding-left: 0; }
.message-row.is-checked { background: rgba(63,107,74,0.08); }
.message-row.is-selected {
  background: rgba(63,107,74,0.15);
  border-left-color: var(--moss);
  box-shadow: inset 0 0 0 1px rgba(63,107,74,0.22);
}
.message-row.is-selected .message-subject {
  color: var(--moss-deep);
  font-weight: 600;
}
.message-row.is-selected .message-from {
  color: var(--ink);
  font-weight: 600;
}
.message-row.is-selected .message-date::before {
  content: '表示中';
  display: inline-block;
  margin-right: 6px;
  padding: 1px 7px;
  border-radius: 100px;
  background: var(--moss);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  line-height: 16px;
  vertical-align: middle;
}

.filter-row-body p { margin: 0 0 4px 0; }
.filter-cond { color: var(--ink); }
.filter-action { color: var(--moss-deep); font-size: 13.5px; }
.filter-row-actions { display: flex; align-items: center; gap: 6px; flex: none; }

.message-row.is-unread .message-subject { font-weight: 600; }
.message-main { min-width: 0; width: 100%; }
.message-row-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.message-row-head .message-from { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.message-actions, .thread-action-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px;
}
.message-actions { display: none; width: 100%; margin-top: 9px; }
.message-row:hover .message-actions, .message-row:focus-within .message-actions { display: flex; }
.mail-action {
  border: 1px solid transparent;
  background: transparent;
  border-radius: 3px;
  min-width: 28px;
  height: 28px;
  padding: 2px 6px;
  color: var(--ink-soft);
  cursor: pointer;
}
.mail-action:hover, .mail-action.is-active { border-color: var(--line); background: #fff; color: var(--moss-deep); }
.mail-action.is-danger:hover { color: var(--danger); }
.mail-label-select { max-width: 145px; height: 28px; border: 1px solid var(--line); border-radius: 3px; background: #fff; color: var(--ink); font-size: 12px; }
.thread-action-bar { margin: -10px 0 20px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.thread-labels { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 12px; }
.thread-label-chip { padding: 3px 8px; border-radius: 100px; background: rgba(63,107,74,0.1); color: var(--moss-deep); font-size: 12px; }
.message-from { color: var(--ink-soft); font-size: 13px; margin-bottom: 3px; }
.message-subject { margin: 0 0 3px 0; }
.message-snippet { color: var(--ink-soft); font-size: 13.5px; margin: 0; }
.message-subject, .message-snippet { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.message-date { color: #96897d; font-size: 12.5px; white-space: nowrap; }

.folder-edit { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; width: 100%; }
.folder-edit input[type=text] { flex: 1; min-width: 160px; }
.folder-color-dot { width: 12px; height: 12px; border-radius: 50%; border: 1px solid var(--line); flex: none; }
.folder-create-form select, .folder-edit select, .folder-edit input {
  font-family: var(--sans); font-size: 13px; padding: 8px; border: 1px solid var(--line); border-radius: 4px; background: #fff;
}

.badge {
  font-size: 11.5px;
  padding: 2px 8px;
  border-radius: 100px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  white-space: nowrap;
}
.badge.pending { color: var(--clay); border-color: var(--clay); }
.badge.verified { color: var(--moss-deep); border-color: var(--moss); }

.empty-state { color: var(--ink-soft); font-size: 14px; padding: 20px 0; }

/* --- アカウント切り替え・未読数 --- */
.account-block {
  margin: 0 0 24px 0;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.side-label {
  margin: 0 0 8px 10px;
  font-size: 12px;
  color: #96897d;
  letter-spacing: 0.04em;
}
.account-list { list-style: none; margin: 0; padding: 0; }
.account-item {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: none;
  border: none;
  border-left: 2px solid transparent;
  font-family: var(--sans);
  font-size: 13.5px;
  padding: 8px 10px;
  border-radius: 0 4px 4px 0;
  color: var(--ink-soft);
  cursor: pointer;
  text-align: left;
}
.account-item:hover { background: rgba(63,107,74,0.08); color: var(--ink); }
.account-item.is-active {
  background: rgba(63,107,74,0.12);
  color: var(--moss-deep);
  font-weight: 500;
  border-left-color: var(--moss);
}
.account-email { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.unread-count {
  flex: none;
  min-width: 20px;
  padding: 0 7px;
  border-radius: 100px;
  background: var(--moss);
  color: #fff;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 20px;
  text-align: center;
}
.account-add {
  display: block;
  margin: 6px 0 0 10px;
  font-size: 13px;
  color: var(--moss-deep);
  text-decoration: none;
}
.account-add:hover { text-decoration: underline; }

.tab-count {
  margin-left: 6px;
  padding: 0 7px;
  border-radius: 100px;
  background: var(--moss);
  color: #fff;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 18px;
  display: inline-block;
}

/* --- 作成・下書き編集フォーム --- */
.compose-heading {
  margin: 0 0 16px 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18px;
}
.compose-notice {
  margin: 0 0 16px 0;
  padding: 10px 12px;
  border-left: 3px solid var(--clay);
  background: rgba(180,113,58,0.08);
  color: var(--ink);
  font-size: 13.5px;
}
.compose-form .rule-form-actions { flex-wrap: wrap; }
.compose-form button:disabled { opacity: 0.55; cursor: default; }

/* --- リッチテキスト・添付ファイル --- */
.editor-shell { margin: -8px 0 14px; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.editor-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 3px;
  padding: 6px;
  border-bottom: 1px solid var(--line);
  background: #faf8f5;
}
.editor-toolbar button {
  min-height: 30px;
  padding: 4px 8px;
  border: 1px solid transparent;
  border-radius: 3px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.editor-toolbar button:hover { border-color: var(--line); background: #fff; }
.editor-toolbar.is-plain > :not([data-action="toggle-mode"]) { display: none; }
.editor-toolbar input[type=color] { width: 32px; height: 30px; padding: 2px; border: 0; background: transparent; }
.editor-toolbar select { height: 30px; border: 1px solid var(--line); border-radius: 3px; background: #fff; color: var(--ink); }
.rich-editor {
  min-height: 210px;
  padding: 12px;
  outline: none;
  line-height: 1.6;
  overflow-wrap: anywhere;
}
.rich-editor--reply { min-height: 130px; }
.signature-editor { min-height: 150px; }
.signature-account { margin: 0 0 18px; color: var(--ink-soft); font-size: 13.5px; }
.rich-editor:empty::before { content: attr(data-placeholder); color: #9b9188; pointer-events: none; }
.rich-editor img { max-width: 100%; height: auto; }
.rich-editor blockquote { margin: 8px 0; padding-left: 12px; border-left: 3px solid var(--line); color: var(--ink-soft); }
.plain-editor { width: 100%; border: 0 !important; border-radius: 0 !important; min-height: 210px; }
.attachment-controls { display: flex; align-items: center; gap: 10px; margin: 0 0 10px; }
.attachment-picker { display: inline-flex !important; flex-direction: row !important; margin: 0 !important; color: var(--ink) !important; }
.attachment-limit { font-size: 12px; color: var(--ink-soft); }
.attachment-list { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 14px; }
.attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  max-width: 100%;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #faf8f5;
  font-size: 12.5px;
}
.attachment-chip-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.attachment-chip button { padding: 0; border: 0; background: none; color: var(--danger); cursor: pointer; }
.message-attachments { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 12px; }
.attachment-download { cursor: pointer; color: var(--moss-deep); }

@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; }
  .side { flex-direction: row; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--line); padding: 16px; }
  .wordmark { display: none; }
  .account-block { display: flex; align-items: center; gap: 8px; margin: 0 12px 0 0; padding: 0 12px 0 0; border-bottom: none; border-right: 1px solid var(--line); }
  .account-list { display: flex; }
  .account-item { width: auto; white-space: nowrap; }
  .account-email { max-width: 160px; }
  .side-label { display: none; }
  .account-add { margin: 0; white-space: nowrap; }
  .main { padding: 28px 20px; }
  .rule-form-grid { grid-template-columns: 1fr; }
  .advanced-search { grid-template-columns: 1fr; }
  .mail-split { grid-template-columns: 1fr; }
  .mail-detail-col { position: static; max-height: none; overflow-y: visible; padding-right: 0; border-left: none; padding-left: 0; margin-top: 28px; border-top: 1px solid var(--line); padding-top: 28px; }
  .message-actions { display: flex; }
}