:root {
    --ink: #1a1208;
    --ink-light: #4a3f2f;
    --ink-faint: #8c7b65;
    --paper: #f5f0e8;
    --paper-warm: #ede6d6;
    --paper-deep: #d9ceba;
    --accent: #c8522a;
    --accent-light: #e8896a;
    --accent-pale: #f5ddd5;
    --green: #3a6b4a;
    --green-pale: #d4e8da;
    --blue: #2d4f7c;
    --blue-pale: #d0dff0;
    --gold: #b8972a;
    --gold-pale: #f0e6c0;
    --shadow: rgba(26,18,8,0.12);
    --shadow-deep: rgba(26,18,8,0.25);
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }

  body {
    font-family: 'Noto Sans JP', sans-serif;
    background: var(--paper);
    color: var(--ink);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
  }

  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
      repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(180,160,120,0.08) 28px),
      repeating-linear-gradient(90deg, transparent, transparent 27px, rgba(180,160,120,0.04) 28px);
    pointer-events: none;
    z-index: 0;
  }

  /* ── LOGIN SCREEN ────────────────────── */
  #loginScreen {
    position: fixed;
    inset: 0;
    background: var(--paper);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
  }
  #loginScreen::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
      repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(180,160,120,0.08) 28px),
      repeating-linear-gradient(90deg, transparent, transparent 27px, rgba(180,160,120,0.04) 28px);
    pointer-events: none;
  }
  .login-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 40px var(--shadow-deep), 0 0 0 1px rgba(180,160,120,0.15);
    width: 100%;
    max-width: 400px;
    overflow: hidden;
    position: relative;
    animation: slideUp 0.3s ease;
  }
  .login-header {
    background: var(--ink);
    color: var(--paper);
    padding: 2rem;
    text-align: center;
  }
  .login-logo {
    font-family: 'Shippori Mincho', serif;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 0.25rem;
  }
  .login-tagline {
    font-family: 'DM Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--paper-deep);
    text-transform: uppercase;
  }
  .login-body { padding: 2rem; display: flex; flex-direction: column; gap: 1rem; }
  .login-desc { font-size: 0.83rem; color: var(--ink-faint); text-align: center; line-height: 1.6; }
  .login-step { display: none; flex-direction: column; gap: 1rem; }
  .login-step.active { display: flex; }
  .login-error {
    background: var(--accent-pale);
    border: 1px solid rgba(200,82,42,0.3);
    border-radius: 6px;
    padding: 0.6rem 0.75rem;
    font-size: 0.78rem;
    color: var(--accent);
    display: none;
  }
  .login-error.show { display: block; }
  .login-code-hint {
    font-size: 0.75rem;
    color: var(--ink-faint);
    text-align: center;
  }
  .btn-login {
    width: 100%;
    justify-content: center;
    padding: 0.75rem;
    font-size: 0.9rem;
  }
  .login-back {
    background: none; border: none;
    color: var(--ink-faint); font-size: 0.78rem;
    cursor: pointer; text-align: center;
    text-decoration: underline;
  }
  .login-back:hover { color: var(--ink); }
  header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--ink);
    color: var(--paper);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    box-shadow: 0 2px 16px var(--shadow-deep);
  }

  .logo {
    font-family: 'Shippori Mincho', serif;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    gap: 0.6rem;
  }
  .logo-en {
    font-family: 'DM Mono', monospace;
    font-size: 0.65rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: var(--paper-deep);
    text-transform: uppercase;
    margin-top: 2px;
    display: block;
  }

  .header-actions { display: flex; gap: 0.75rem; align-items: center; position: relative; }
  .header-actions-collapsible { display: flex; gap: 0.75rem; align-items: center; }
  .header-menu-toggle {
    display: none;
    background: none; border: none;
    color: var(--paper);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    transition: background 0.15s;
  }
  .header-menu-toggle:hover { background: rgba(255,255,255,0.08); }

  .logo-text { display: inline; }

  .drive-status {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    border: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.6);
    transition: all 0.15s;
    white-space: nowrap;
  }
  .drive-status:hover { background: rgba(255,255,255,0.08); color: white; }
  .drive-status.connected { border-color: rgba(58,107,74,0.6); color: #7ec89a; }
  .drive-status.syncing { border-color: rgba(184,151,42,0.6); color: #e0c060; animation: pulse 1.2s infinite; }
  @keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.5} }

  .btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.15s;
    white-space: nowrap;
  }
  .btn-primary { background: var(--accent); color: white; }
  .btn-primary:hover { background: #a8421a; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(200,82,42,0.4); }
  .btn-ghost { background: transparent; color: var(--paper); border: 1px solid rgba(255,255,255,0.2); }
  .btn-ghost:hover { background: rgba(255,255,255,0.08); }
  .btn-outline { background: transparent; color: var(--ink); border: 1px solid var(--paper-deep); }
  .btn-outline:hover { background: var(--paper-warm); }

  /* ── MAIN LAYOUT ─────────────────────── */
  main {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
    display: flex;
    flex-direction: row;
    align-items: start;
    gap: 0;
    /* 左右カラムが独立してスクロールできるよう高さを確定させる */
    min-height: calc(100vh - 80px);
  }

  /* メインコンテンツ列（右側） */
  #mainContent {
    flex: 1 1 auto;
    min-width: 300px;
    overflow: hidden;
  }

  /* ドラッグ可能スプリッター */
  .main-splitter {
    flex: 0 0 5px;
    width: 5px;
    cursor: col-resize;
    position: relative;
    align-self: stretch;
    margin: 0 0.5rem;
    border-radius: 3px;
    transition: background 0.15s;
  }
  .main-splitter::after {
    content: '';
    position: absolute;
    top: 0; bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 2px;
    background: var(--paper-deep);
    border-radius: 2px;
    transition: width 0.15s, background 0.15s;
  }
  .main-splitter:hover::after,
  .main-splitter.dragging::after {
    width: 4px;
    background: var(--accent-light);
  }

  @media (max-width: 768px) {
    main { grid-template-columns: 1fr; }
  }

  /* ── SIDEBAR ─────────────────────────── */
  aside {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: sticky;
    top: 80px;
    flex: 0 0 280px;
    width: 280px;
    min-width: 180px;
    /* aside 全体だけがスクロール。中の各カードはスクロールさせない */
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--paper-deep) transparent;
    padding-right: 2px;
  }
  aside::-webkit-scrollbar { width: 4px; }
  aside::-webkit-scrollbar-track { background: transparent; }
  aside::-webkit-scrollbar-thumb { background: var(--paper-deep); border-radius: 2px; }

  /* aside 内の各カードは自分でスクロールしない → 全内容を縦に展開 */
  aside .card {
    height: auto;
    max-height: none;
    overflow: visible;
    /* box-shadow と border-radius は維持しつつ内容を見切れさせない */
  }
  aside .card .category-list,
  aside .card .summary-body,
  aside .card .mini-chart {
    height: auto;
    max-height: none;
    overflow: visible;
  }

  .card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 12px var(--shadow), 0 0 0 1px rgba(180,160,120,0.15);
    overflow: hidden;
  }

  .card-header {
    padding: 1rem 1.25rem 0.75rem;
    border-bottom: 1px solid var(--paper-warm);
    font-family: 'Shippori Mincho', serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ink-light);
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  /* ── MONTH SUMMARY ───────────────────── */
  .month-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.25rem;
    background: var(--ink);
    color: var(--paper);
  }
  .month-nav button {
    background: none; border: none; color: var(--paper);
    cursor: pointer; font-size: 1rem; padding: 0.25rem 0.5rem;
    border-radius: 3px; transition: background 0.15s;
  }
  .month-nav button:hover { background: rgba(255,255,255,0.12); }
  .month-label {
    font-family: 'Shippori Mincho', serif;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.08em;
  }

  .summary-body { padding: 1rem 1.25rem; }

  .summary-row {
    display: flex; justify-content: space-between; align-items: baseline;
    padding: 0.5rem 0;
    border-bottom: 1px dashed var(--paper-deep);
    font-size: 0.85rem;
  }
  .summary-row:last-child { border-bottom: none; }
  .summary-row .label { color: var(--ink-faint); }
  .summary-row .amount { font-family: 'DM Mono', monospace; font-weight: 500; }
  .amount-expense { color: var(--accent); }
  .amount-income { color: var(--green); }
  .amount-balance { color: var(--ink); font-size: 1rem; font-weight: 600; }

  /* ── CATEGORY BREAKDOWN ──────────────── */
  .category-list { padding: 0.5rem 0; }
  .category-item {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.6rem 1.25rem;
    cursor: pointer;
    transition: background 0.1s;
    font-size: 0.82rem;
  }
  .category-item:hover { background: var(--paper); }
  .category-item.active { background: var(--accent-pale); }

  .cat-dot {
    width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0;
  }
  .cat-name { flex: 1; color: var(--ink-light); }
  .cat-amount { font-family: 'DM Mono', monospace; font-size: 0.8rem; color: var(--ink-faint); }

  /* ── UPLOAD ZONE ─────────────────────── */
  .upload-zone {
    border: 2px dashed var(--paper-deep);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: white;
    position: relative;
    overflow: hidden;
  }
  .upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-pale);
  }
  .upload-zone input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; }

  .upload-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }
  .upload-title {
    font-family: 'Shippori Mincho', serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 0.4rem;
  }
  .upload-sub { font-size: 0.78rem; color: var(--ink-faint); }

  /* ── PROCESSING OVERLAY ──────────────── */
  .processing {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
    padding: 3rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 12px var(--shadow);
  }
  .processing.active { display: flex; }

  .spinner {
    width: 40px; height: 40px;
    border: 3px solid var(--paper-deep);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
  }
  @keyframes spin { to { transform: rotate(360deg); } }

  .processing-text {
    font-family: 'Shippori Mincho', serif;
    font-size: 0.9rem;
    color: var(--ink-light);
    text-align: center;
  }

  /* ── RECEIPT PREVIEW ─────────────────── */
  .receipt-preview {
    display: none;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 12px var(--shadow);
    overflow: hidden;
  }
  .receipt-preview.active {
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 3rem);
  }

  .preview-header {
    padding: 1rem 1.25rem;
    background: var(--paper-warm);
    border-bottom: 1px solid var(--paper-deep);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
  }
  .preview-title {
    font-family: 'Shippori Mincho', serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ink);
  }

  /* Preview body: image left, form right */
  .preview-body {
    display: flex;
    flex-direction: row;
    flex: 1;
    overflow: hidden;
    min-height: 0;
  }

  .preview-img-col {
    width: clamp(220px, 40%, 420px);
    min-width: 220px;
    max-height: 420px;
    flex-shrink: 0;
    background: #1a1a1a;
    border-right: 1px solid var(--paper-warm);
    display: none;
    overflow: hidden;
    align-self: flex-start;
    position: relative;
    cursor: grab;
    user-select: none;
    touch-action: none;
  }
  .preview-img-col:active { cursor: grabbing; }
  .preview-img-col.visible { display: block; }
  .preview-img-col img {
    display: block;
    width: 100%;
    height: auto;
    transform-origin: 0 0;
  }
  /* Pan & Zoom viewer image (class added by JS) */
  .viewer-img {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: auto !important;
    height: auto !important;
    transform-origin: 0 0;
    display: block;
    will-change: transform;
    cursor: inherit;
  }
  /* Viewer operation hint */
  .viewer-hint {
    position: absolute;
    bottom: 0.4rem;
    right: 0.4rem;
    background: rgba(0,0,0,0.52);
    color: rgba(255,255,255,0.82);
    font-size: 0.62rem;
    padding: 0.22rem 0.45rem;
    border-radius: 3px;
    pointer-events: none;
    z-index: 10;
    white-space: nowrap;
    line-height: 1.6;
  }
  .multi-img-placeholder {
    display: flex;
    flex: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 1rem;
    text-align: center;
    min-height: 200px;
    color: var(--ink-light);
    gap: 0.5rem;
    background: #f8f8f8;
    border: 1px solid var(--paper-warm);
    border-radius: 6px;
    margin: 0.75rem;
    box-sizing: border-box;
  }
  .multi-img-placeholder .ph-store {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--ink);
  }
  .multi-img-placeholder .ph-msg {
    font-size: 0.75rem;
    line-height: 1.7;
    color: var(--ink-light);
  }
  .img-magnifier {
    position: fixed;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.55);
    box-shadow: 0 2px 16px rgba(0,0,0,0.65);
    background-repeat: no-repeat;
    pointer-events: none;
    display: none;
    z-index: 200;
  }
  .img-view-btn { display: none; }
  #imgFullscreenOverlay {
    display: none;
    position: fixed;
    inset: 0;
    background: #000;
    z-index: 500;
    overflow: hidden;
    cursor: grab;
    user-select: none;
    touch-action: none;
  }
  #imgFullscreenOverlay:active { cursor: grabbing; }
  #imgFullscreenOverlay.active { display: block; }
  #imgFullscreenOverlay img {
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: 0 0;
    display: block;
    will-change: transform;
  }
  .img-fullscreen-close {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    border-radius: 0;
    background: rgba(0,0,0,0.75);
    color: #fff;
    border: none;
    border-bottom: 1px solid rgba(255,255,255,0.15);
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    font-family: 'Noto Sans JP', sans-serif;
    cursor: pointer;
    text-align: left;
    z-index: 510;
  }

  .preview-fields { flex: 1; padding: 1rem 1.25rem; display: flex; flex-direction: column; gap: 0.75rem; }

  .field-group { display: flex; flex-direction: column; gap: 0.3rem; }
  .field-label { font-size: 0.72rem; color: var(--ink-faint); letter-spacing: 0.05em; text-transform: uppercase; }
  .field-input {
    border: 1px solid var(--paper-deep);
    border-radius: 4px;
    padding: 0.45rem 0.75rem;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.85rem;
    color: var(--ink);
    background: var(--paper);
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    transition: border-color 0.15s;
  }
  .field-input:focus { outline: none; border-color: var(--accent); background: white; }

  .field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

  select.field-input { cursor: pointer; }

  .items-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
  .items-table th {
    text-align: left; padding: 0.35rem 0.5rem;
    font-size: 0.7rem; font-weight: 500;
    color: var(--ink-faint); letter-spacing: 0.05em;
    border-bottom: 1px solid var(--paper-deep);
  }
  .items-table td { padding: 0.35rem 0.5rem; border-bottom: 1px solid var(--paper); }
  .items-table tr:last-child td { border-bottom: none; }

  .preview-actions {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--paper-warm);
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    flex-shrink: 0;
  }

  /* ── TRANSACTIONS LIST ───────────────── */
  .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
  }
  .section-title {
    font-family: 'Shippori Mincho', serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink);
  }

  .filter-tabs {
    display: flex;
    gap: 0.25rem;
    background: var(--paper-warm);
    border-radius: 6px;
    padding: 0.25rem;
  }
  .filter-tab {
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    font-size: 0.78rem;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--ink-faint);
    transition: all 0.15s;
  }
  .filter-tab.active { background: white; color: var(--ink); box-shadow: 0 1px 4px var(--shadow); }

  .tx-list { display: flex; flex-direction: column; gap: 0.5rem; }

  .tx-item {
    background: white;
    border-radius: 8px;
    padding: 0.85rem 1.1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 1px 6px var(--shadow);
    transition: all 0.15s;
    cursor: pointer;
    position: relative;
  }
  .tx-item:hover {
    box-shadow: 0 4px 16px var(--shadow-deep);
    transform: translateY(-1px);
    background: #fdfaf6;
  }
  /* ダブルクリック可能ヒント: ホバー時に右下に小さな鉛筆アイコン */
  .tx-item::after {
    content: '✎ ダブルクリックで編集';
    position: absolute;
    bottom: 0.3rem;
    right: 3.5rem;
    font-size: 0.6rem;
    color: var(--ink-faint);
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
    white-space: nowrap;
  }
  .tx-item:hover::after { opacity: 1; }

  .tx-cat-icon {
    width: 36px; height: 36px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
  }

  .tx-info { flex: 1; min-width: 0; }
  .tx-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .tx-meta { font-size: 0.75rem; color: var(--ink-faint); margin-top: 0.2rem; display: flex; gap: 0.75rem; }

  .tx-amount {
    font-family: 'DM Mono', monospace;
    font-weight: 500;
    font-size: 0.95rem;
    flex-shrink: 0;
  }

  .tx-receipt-badge {
    font-size: 0.65rem;
    background: var(--gold-pale);
    color: var(--gold);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-weight: 500;
  }

  .tx-delete {
    opacity: 0;
    background: none;
    border: none;
    color: var(--ink-faint);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: all 0.15s;
    font-size: 0.9rem;
  }
  .tx-item:hover .tx-delete { opacity: 1; }
  .tx-delete:hover { background: var(--accent-pale); color: var(--accent); }
  .tx-edit {
    opacity: 0;
    background: none;
    border: none;
    color: var(--ink-faint);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: all 0.15s;
    font-size: 0.85rem;
  }
  .tx-item:hover .tx-edit { opacity: 1; }
  .tx-edit:hover { background: var(--blue-pale); color: var(--blue); }

  /* ── MANUAL ENTRY MODAL ──────────────── */
  .modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(26,18,8,0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
  }
  .modal-overlay.active { display: flex; }

  .modal {
    background: white;
    border-radius: 12px;
    width: 480px;
    max-width: 95vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px var(--shadow-deep);
    overflow: hidden;
    animation: slideUp 0.25s ease;
  }
  @keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--paper-warm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
  }
  .modal-title {
    font-family: 'Shippori Mincho', serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
  }
  .modal-close {
    background: none; border: none; cursor: pointer;
    color: var(--ink-faint); font-size: 1.2rem; padding: 0.25rem;
    border-radius: 4px; transition: all 0.15s;
  }
  .modal-close:hover { background: var(--paper-warm); color: var(--ink); }

  .modal-body {
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
    flex: 1;
  }
  .modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--paper-warm);
    display: flex; gap: 0.75rem; justify-content: flex-end;
    flex-shrink: 0;
  }

  /* ── TOAST ───────────────────────────── */
  .toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    pointer-events: none;
    transform: translateX(-50%) translateY(200px);
    opacity: 0;
    background: var(--ink);
    color: var(--paper);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 0.85rem;
    box-shadow: 0 4px 20px var(--shadow-deep);
    z-index: 300;
    transition: transform 0.3s ease, opacity 0.3s ease;
    white-space: nowrap;
  }
  .toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
  .toast.success { border-left: 3px solid #4caf50; }
  .toast.error { border-left: 3px solid var(--accent); }

  /* ── EMPTY STATE ─────────────────────── */
  .empty-state {
    padding: 3rem 2rem;
    text-align: center;
    color: var(--ink-faint);
  }
  .empty-state .icon { font-size: 2.5rem; margin-bottom: 1rem; opacity: 0.5; }
  .empty-state p { font-size: 0.85rem; }

  /* ── CHART ───────────────────────────── */
  .mini-chart { padding: 1rem 1.25rem; display: flex; justify-content: center; }
  #pieChart { display: block; max-width: 180px; max-height: 180px; }

  /* ── CATEGORY TREND（横スクロール）───── */
  .trend-scroll-wrap {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    padding: 0.75rem 0.75rem 0.25rem;
    scrollbar-width: thin;
    scrollbar-color: var(--paper-deep) transparent;
  }
  .trend-scroll-wrap::-webkit-scrollbar { height: 5px; }
  .trend-scroll-wrap::-webkit-scrollbar-track { background: transparent; }
  .trend-scroll-wrap::-webkit-scrollbar-thumb { background: var(--paper-deep); border-radius: 3px; }
  .trend-scroll-inner { min-width: 560px; height: 150px; position: relative; }
  .trend-scroll-inner canvas { display: block; }

  /* ── TREND LEGEND（凡例クリックでカテゴリ表示トグル。PC・スマホ共通）── */
  .trend-legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.2rem 0.5rem;
    font-size: 0.78rem;
    cursor: pointer;
    user-select: none;
    border-radius: 5px;
    transition: background 0.12s, opacity 0.12s;
  }
  .trend-legend-item:hover { background: var(--paper-warm); }
  .trend-legend-item.hidden { opacity: 0.4; }
  .trend-legend-item.hidden .trend-legend-label { text-decoration: line-through; }
  .trend-legend-item--sm { font-size: 0.72rem; padding: 0.15rem 0.5rem; }
  .trend-legend-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
  .trend-legend-item--sm .trend-legend-dot { width: 8px; height: 8px; }
  .trend-legend-label {
    flex: 1;
    color: var(--ink-light);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .trend-legend-amount { font-family: 'DM Mono', monospace; color: var(--ink-faint); }

  /* ── SETTINGS PANEL ──────────────────── */
  .settings-btn {
    background: none; border: none;
    color: rgba(255,255,255,0.6);
    cursor: pointer; font-size: 1.1rem;
    padding: 0.4rem; border-radius: 4px;
    transition: all 0.15s;
  }
  .settings-btn:hover { background: rgba(255,255,255,0.1); color: white; }

  .api-notice {
    background: var(--gold-pale);
    border: 1px solid rgba(184,151,42,0.3);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    font-size: 0.78rem;
    color: var(--ink-light);
    margin-bottom: 0.5rem;
  }

  /* Tags */
  .tag {
    display: inline-flex; align-items: center; gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 500;
  }

  /* ── MULTI-RECEIPT QUEUE ──────────────── */
  .multi-preview {
    display: none;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 12px var(--shadow);
    overflow: hidden;
  }
  .multi-preview.active {
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 3rem);
  }

  .multi-header {
    padding: 0.85rem 1.25rem;
    background: var(--ink);
    color: var(--paper);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
  }
  .multi-header-title {
    font-family: 'Shippori Mincho', serif;
    font-size: 0.9rem;
    font-weight: 600;
  }
  .multi-header-close {
    background: none; border: none; cursor: pointer;
    color: rgba(255,255,255,0.85); font-size: 1.2rem; padding: 0.2rem 0.5rem;
    border-radius: 4px; transition: all 0.15s;
    display: none; /* PCでは多くのアクションボタンが下部にあるため非表示。スマホで表示 */
  }
  .multi-header-close:hover { background: rgba(255,255,255,0.15); color: white; }
  .multi-progress {
    font-family: 'DM Mono', monospace;
    font-size: 0.78rem;
    color: var(--paper-deep);
  }

  .multi-tabs {
    display: flex;
    border-bottom: 1px solid var(--paper-warm);
    overflow-x: auto;
    background: var(--paper-warm);
    flex-shrink: 0;
  }
  .multi-tab {
    padding: 0.6rem 1rem;
    font-size: 0.78rem;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--ink-faint);
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 0.35rem;
  }
  .multi-tab.active { background: white; color: var(--ink); border-bottom-color: var(--accent); }
  .multi-tab.saved { color: var(--green); }
  .multi-tab .tab-check { display: none; }
  .multi-tab.saved .tab-check { display: inline; }

  .multi-body { padding: 0; display: flex; flex-direction: row; overflow: hidden; flex: 1; min-height: 0; }

  .multi-actions {
    padding: 0.85rem 1.25rem;
    border-top: 1px solid var(--paper-warm);
    display: flex;
    gap: 0.75rem;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
  }
  .multi-nav { display: flex; gap: 0.5rem; }
  .multi-total-bar {
    font-family: 'DM Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ink);
    white-space: nowrap;
  }

  /* ── MULTI-PREVIEW BACKDROP ──────────────────── */
  #multiPreviewBackdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(26,18,8,0.45);
    z-index: 99;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
  }
  #multiPreviewBackdrop.active { display: block; }
  body.modal-open { overflow: hidden; }

  /* ── CSV IMPORT MODAL ──────────────────── */
  .import-preview-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
    max-height: 200px;
    overflow-y: auto;
    display: block;
  }
  .import-preview-table th {
    padding: 0.35rem 0.6rem;
    background: var(--paper-warm);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--ink-faint);
    text-align: left;
    position: sticky;
    top: 0;
  }
  .import-preview-table td {
    padding: 0.3rem 0.6rem;
    border-bottom: 1px solid var(--paper);
  }
  .import-preview-table tr:last-child td { border-bottom: none; }

  /* ── EDITABLE ITEMS ──────────────────── */
  .item-row-input {
    border: none;
    background: transparent;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.8rem;
    color: var(--ink);
    width: 100%;
    padding: 0.2rem 0.3rem;
    border-radius: 3px;
    transition: background 0.1s;
  }
  .item-row-input:focus {
    outline: none;
    background: var(--accent-pale);
  }
  .item-row-input:hover { background: var(--paper-warm); }
  .item-row-del {
    background: none; border: none;
    color: var(--ink-faint); cursor: pointer;
    font-size: 0.8rem; padding: 0.15rem 0.3rem;
    border-radius: 3px; transition: all 0.1s;
  }
  .item-row-del:hover { background: var(--accent-pale); color: var(--accent); }
  .item-row-copy {
    background: none; border: none;
    color: var(--ink-faint); cursor: pointer;
    font-size: 0.8rem; padding: 0.15rem 0.3rem;
    border-radius: 3px; transition: all 0.1s;
  }
  .item-row-copy:hover { background: var(--blue-pale); color: var(--blue); }
  .item-row-highlighted td { background: rgba(200,82,42,0.08); }
  @keyframes total-auto-flash {
    0%   { background: #fffde7; box-shadow: 0 0 0 2px #f9a825; }
    70%  { background: #fffde7; box-shadow: 0 0 0 2px #f9a825; }
    100% { background: transparent; box-shadow: none; }
  }
  .total-auto-updated { animation: total-auto-flash 0.9s ease-out; }

  /* ── ITEM CATEGORY SELECT ────────────── */
  .item-cat-select {
    border: none; background: transparent;
    font-size: 0.75rem; color: var(--ink-faint);
    cursor: pointer; padding: 0.15rem 0.2rem;
    border-radius: 3px; transition: background 0.1s;
    max-width: 100px;
  }
  .item-cat-select:hover { background: var(--paper-warm); }
  .item-cat-select:focus { outline: none; background: var(--accent-pale); }

  /* ── CHART MODAL ─────────────────────── */
  #annualBarCanvas { width: 100% !important; height: 180px !important; }

  /* Provider cards */
  .provider-card {
    border: 2px solid var(--paper-deep);
    border-radius: 8px;
    padding: 0.75rem;
    text-align: center;
    transition: all 0.15s;
    background: var(--paper);
  }
  .provider-card:hover { border-color: var(--accent-light); background: var(--accent-pale); }
  .provider-card.selected {
    border-color: var(--accent);
    background: var(--accent-pale);
    box-shadow: 0 0 0 3px rgba(200,82,42,0.15);
  }

  /* ══════════════════════════════════════════════
     RESPONSIVE / MOBILE
     ══════════════════════════════════════════════ */

  /* Tablet ≤1024px */
  @media (max-width: 1024px) {
    main {
      padding: 1.5rem 1.25rem 3rem;
    }
    aside {
      flex-basis: 220px;
      width: 220px;
      max-height: calc(100vh - 90px);
      top: 70px;
    }
  }

  /* Mobile ≤768px — bottom-sheet modals + stacked layout */
  @media (max-width: 768px) {
    /* ── LAYOUT ── */
    main {
      flex-direction: column;
      padding: 1rem 0.75rem 5rem;
      gap: 1rem;
    }

    .main-splitter { display: none !important; }
    aside { position: static; width: 100%; flex-basis: auto; }
    #mainContent { min-width: 0; width: 100%; }

    /* ── HEADER（ミニマル版：ロゴ文字とメールアドレスを隠し、アイコン＋ハンバーガーに）── */
    header {
      padding: env(safe-area-inset-top, 0px) 0.75rem 0;
      height: auto;
      min-height: calc(56px + env(safe-area-inset-top, 0px));
    }

    .logo { font-size: 1.5rem; gap: 0; }
    .logo-text, .logo-en { display: none; }
    .header-actions { gap: 0.35rem; }

    /* メールアドレス（ログイン中バッジ）は完全非表示 */
    #authBadge { display: none !important; }

    /* ハンバーガーメニュー：CSV読込/出力・Drive同期をここに格納 */
    .header-menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
    .header-actions-collapsible {
      display: none;
      position: absolute;
      top: 100%;
      right: 0;
      margin-top: 0.6rem;
      background: var(--ink);
      flex-direction: column;
      align-items: stretch;
      gap: 0.5rem;
      padding: 0.75rem;
      border-radius: 10px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.35);
      min-width: 200px;
      z-index: 120;
    }
    .header-actions-collapsible.open { display: flex; }
    .header-actions-collapsible .drive-status { width: 100%; }
    .header-actions-collapsible .btn { width: 100%; justify-content: flex-start; }

    .btn {
      padding: 0.4rem 0.65rem;
      font-size: 0.78rem;
    }
    .btn-primary { padding: 0.45rem 0.8rem; }

    /* ── LOGIN ── */
    .login-header { padding: 1.5rem; }
    .login-body { padding: 1.5rem; }

    /* ── FIELDS ── */
    .field-row { grid-template-columns: 1fr !important; }

    /* ── RECEIPT PREVIEW — full-screen overlay on mobile ── */
    .receipt-preview.active {
      position: fixed;
      inset: 0;
      z-index: 150;
      border-radius: 0;
      display: flex;
      flex-direction: column;
      height: 100vh;
      height: 100dvh;
      overflow: hidden;
    }
    .receipt-preview .preview-body {
      flex: 1;
      flex-direction: column;
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
    }
    /* モバイル: 単票プレビューの画像コラムは非表示、代わりにボタン（複数レシートは下のスプリット表示に切替） */
    .receipt-preview .preview-img-col { display: none !important; }
    .receipt-preview .img-view-btn { display: flex !important; justify-content: center; }
    .img-magnifier { display: none !important; }
    .receipt-preview .preview-actions {
      flex-shrink: 0;
      padding: 0.875rem 1.25rem calc(0.875rem + env(safe-area-inset-bottom, 8px));
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .preview-actions .btn { flex: 1; justify-content: center; }

    /* ── MULTI-RECEIPT PREVIEW — full-screen overlay on mobile ── */
    .multi-preview.active {
      position: fixed;
      inset: 0;
      z-index: 150;
      border-radius: 0;
      display: flex;
      flex-direction: column;
      height: 100vh;
      height: 100dvh;
      overflow: hidden;
    }
    /* 上部固定ヘッダーに閉じるボタンを表示（画像が画面を覆って閉じられなくなる事故を防ぐ） */
    .multi-header { flex-shrink: 0; }
    .multi-header-close { display: inline-flex; }
    .multi-preview .multi-tabs { flex-shrink: 0; }

    /* 上下2分割スプリット：上半分＝画像（パン＆ズーム）、下半分＝品目フォーム。それぞれ独立スクロール */
    .multi-preview .multi-body {
      flex: 1;
      flex-direction: column;
      overflow: hidden; /* 内側の各パネルがそれぞれスクロールする */
    }
    /*
     * 画像とフォームを「画面の50%／50%」ではなく「多分割エリア(.multi-body)の50%／50%」で分ける。
     * ヘッダー・タブ・下部アクションバーの実際の高さを差し引いた残り領域を半分ずつ使うことで、
     * アクションバーが折り返して高くなっても画像やフォームが画面外に押し出されない。
     */
    .multi-body .preview-img-col {
      display: block !important;
      width: 100% !important;
      flex: 1 1 50% !important;
      height: auto !important;
      max-height: none !important;
      min-height: 0 !important;
      border-right: none;
      border-bottom: 1px solid var(--paper-warm);
    }
    .multi-body .img-view-btn { display: none !important; } /* 画像は常時インライン表示するため不要 */
    #multiFormArea {
      flex: 1 1 50% !important;
      height: auto !important;
      min-height: 0 !important;
      overflow-y: auto !important;
      -webkit-overflow-scrolling: touch;
    }
    .multi-preview .multi-actions {
      flex-shrink: 0;
      padding-bottom: calc(0.85rem + env(safe-area-inset-bottom, 8px));
    }

    /* ── ITEMS TABLE — horizontal scroll on small screens ── */
    #itemsGroup, .field-group:has(#multiItemsTbody) {
      overflow-x: auto;
    }
    .items-table { min-width: 320px; }

    /* ── BAR CHART ── */
    .bar-name { width: 80px; }

    /* ── SECTION HEADER / FILTERS ── */
    .section-header {
      flex-direction: column;
      align-items: flex-start;
      gap: 0.5rem;
    }
    .filter-tabs { width: 100%; }
    .filter-tab { flex: 1; text-align: center; }
    .tx-delete { opacity: 0.6; }

    /* ── UPLOAD ── */
    .upload-zone { padding: 1.25rem 1rem; }

    /* ── MULTI-RECEIPT ACTIONS ── */
    .multi-actions { flex-direction: column; gap: 0.5rem; }
    .multi-nav { justify-content: center; }
    .multi-actions > div:last-child {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      justify-content: center;
    }
    .multi-actions .btn { flex: 1; min-width: 90px; justify-content: center; }

    /* ── TOAST ── */
    .toast {
      white-space: normal;
      max-width: 88vw;
      text-align: center;
      font-size: 0.8rem;
      bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
    }

    /* ── ANNUAL CHART ── */
    .chart-annual-grid { grid-template-columns: 1fr !important; gap: 1rem !important; }
    #annualCatList { max-height: none !important; }

    /* ── MONTH NAV ── */
    .month-nav button { padding: 0.4rem 0.65rem; font-size: 1.1rem; }

    /* ════════════════════════════════
       BOTTOM-SHEET MODALS
       ════════════════════════════════ */
    .modal-overlay {
      align-items: flex-end;
      padding: 0;
    }

    @keyframes slideUpSheet {
      from { transform: translateY(100%); }
      to   { transform: translateY(0); }
    }

    .modal {
      width: 100% !important;
      max-width: 100% !important;
      border-radius: 20px 20px 0 0;
      max-height: 92vh;
      animation: slideUpSheet 0.32s cubic-bezier(0.34, 1.06, 0.64, 1);
    }

    /* Drag-handle bar at top of sheet */
    .modal::before {
      content: '';
      display: block;
      width: 40px;
      height: 4px;
      background: var(--paper-deep);
      border-radius: 2px;
      margin: 10px auto 0;
      flex-shrink: 0;
    }

    .modal-header {
      padding: 0.75rem 1.25rem 0.875rem;
      border-bottom: 1px solid var(--paper-warm);
    }

    .modal-body {
      padding: 1rem 1.25rem;
      overscroll-behavior: contain;
    }

    .modal-footer {
      padding: 0.875rem 1.25rem calc(0.875rem + env(safe-area-inset-bottom, 8px));
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    .modal-footer .btn {
      flex: 1;
      justify-content: center;
      min-height: 48px;
      font-size: 0.9rem;
      border-radius: 10px;
    }

    /* ── SETTINGS SHEET — full-screen ── */
    #settingsModal {
      align-items: stretch;
    }
    #settingsModal .modal {
      height: 100%;
      max-height: 100%;
      border-radius: 0;
      animation: none;
    }
    #settingsModal .modal::before {
      display: none;
    }
    #settingsModal .modal-body {
      flex: 1;
      overflow-y: auto;
      overflow-x: hidden;
    }
    #settingsModal .modal-footer {
      flex-shrink: 0;
      border-top: 1px solid var(--paper-warm);
    }
    #settingsModal .modal-body small {
      word-break: break-all;
      overflow-wrap: break-word;
    }

    /* Google Drive section padding reduced */
    #settingsModal .field-group > div[style*="background:var(--blue-pale)"],
    #settingsModal > .modal > .modal-body > .field-group[style*="blue-pale"] {
      padding: 0.75rem !important;
    }

    /* Settings sub-section title */
    #settingsModal .modal-body > div[style*="border-top"] {
      padding-top: 0.875rem !important;
    }

    /* ── CHART SHEET ── */
    #chartModal .modal-header {
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    #chartModal .modal-body {
      padding: 1rem 1.25rem;
    }

    /* ── MANUAL / CSV SHEET ── */
    #manualModal .modal-footer .btn,
    #csvImportModal .modal-footer .btn {
      padding: 0.75rem 1rem;
    }

    /* ── CATEGORY TREND DETAIL SHEET ── */
    #categoryTrendPageModal .modal-header {
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    #categoryTrendPageModal .modal-title { font-size: 0.92rem; }
    #categoryTrendPageModal .trend-page-chart-wrap { height: 280px !important; }
    #categoryTrendPageModal .trend-page-controls {
      flex-direction: column;
      align-items: stretch !important;
    }
    #categoryTrendPageModal .trend-page-controls > div { width: 100%; }
    #categoryTrendPageModal #trendFilterSelect { width: 100% !important; }
  }

  /* Small phones ≤480px */
  @media (max-width: 480px) {
    main { padding: 0.75rem 0.5rem 5rem; }
    header { padding: 0.35rem 0.5rem; }
    .logo { font-size: 1.05rem; }
    .logo-en { display: none; }

    /* Prevent iOS auto-zoom on input focus (needs ≥16px) */
    .field-input,
    .item-row-input,
    .item-cat-select { font-size: 16px; }

    .btn { min-height: 40px; }

    .filter-tab {
      padding: 0.3rem 0.4rem;
      font-size: 0.72rem;
    }

    .api-notice {
      font-size: 0.72rem;
      padding: 0.6rem 0.75rem;
    }

    .drive-status { padding: 0.3rem 0.5rem; }

    /* Chart modal: reduce canvas height */
    #annualBarCanvas { height: 140px !important; }

    /* Login card tighter */
    .login-header { padding: 1.25rem; }
    .login-body { padding: 1.25rem; }
    .login-logo { font-size: 1.75rem; }

    /* Transaction items: prevent overflow */
    .tx-item { padding: 0.65rem 0.75rem; }
    .tx-cat-icon { width: 30px; height: 30px; font-size: 0.9rem; }
    .tx-name { font-size: 0.82rem; }
    .tx-amount { font-size: 0.82rem; }
    .tx-delete { padding: 0.15rem; font-size: 0.8rem; }
  }

  /* Prevent horizontal overflow on all screens */
  @media (max-width: 768px) {
    body { overflow-x: hidden; }
    .card { overflow: hidden; }
    [contenteditable] {
      word-break: break-all;
      white-space: normal;
    }
  }

  /* ── PC (≥769px): マルチプレビューを固定モーダル表示 ── */
  @media (min-width: 769px) {
    /*
     * position:fixed + inset で高さは 100vh-3rem に確定。
     * height を一切指定しないことで inset の bottom 制約が有効になる。
     * height:auto を指定するとコンテンツ高さになりオーバーフローするため禁止。
     */
    .multi-preview.active {
      position: fixed;
      inset: 1.5rem;
      z-index: 100;
      max-height: none;
      border-radius: 12px;
      box-shadow: 0 8px 48px var(--shadow-deep), 0 0 0 1px rgba(180,160,120,0.18);
    }

    /* 画像カラム: 左40%、viewer の絶対配置 img を収めるため overflow:hidden */
    .multi-body .preview-img-col,
    .multi-body .preview-img-col.visible {
      display: block !important;
      width: 40% !important;
      flex: 0 0 40% !important;
      min-width: 320px !important;
      max-width: none !important;
      max-height: none;
      height: unset;
      align-self: stretch;
      overflow: hidden !important;
      position: relative;
      background: #1a1a1a;
      cursor: grab;
    }

    .multi-body .preview-img-col:active { cursor: grabbing; }

    /* viewer-img は JS が width/height/transform を直接制御するため CSS 上書き禁止 */
    .multi-body .preview-img-col img.viewer-img {
      width: auto !important;
      height: auto !important;
    }

    /* PC では「画像を表示」ボタンを非表示（常時左カラムに表示するため） */
    .multi-body .img-view-btn {
      display: none !important;
    }
  }