:root {
      --bg: #f5efe6;
      --surface: #fdf8f2;
      --surface2: #ede4d8;
      --border: #ddd0be;
      /* [CHANGE] 字體顏色加深 */
      --text: #1e1408;
      --muted: #6b5a48;
      --accent: #a0622a;
      --accent2: #4a8c72;
      --red: #b85050;
      --shadow: 0 1px 4px rgba(80, 50, 20, 0.1);
      --shadow-lg: 0 4px 24px rgba(80, 50, 20, 0.13);
      --r: 8px;
      --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    }

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

    body {
      background: var(--bg);
      color: var(--text);
      font-family: "DM Mono", monospace;
      min-height: 100vh;
    }

    /* ── Login Screen ─────────────────────────────────── */
    #login-screen {
      position: fixed;
      inset: 0;
      z-index: 1000;
      background: var(--bg);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px;
    }

    #login-screen.hidden {
      display: none;
    }

    .login-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 40px 36px;
      width: 100%;
      max-width: 400px;
      box-shadow: var(--shadow-lg);
      display: flex;
      flex-direction: column;
      gap: 28px;
    }

    .login-header {
      text-align: center;
    }

    .login-logo {
      font-family: "Noto Serif TC", serif;
      font-weight: 600;
      font-size: 25px;
      color: var(--accent);
      letter-spacing: 0.12em;
      margin-bottom: 6px;
    }

    .login-sub {
      font-size: 14px;
      color: var(--muted);
      letter-spacing: 0.08em;
    }

    .login-divider {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: var(--muted);
      letter-spacing: 0.08em;
    }

    .login-divider::before,
    .login-divider::after {
      content: "";
      flex: 1;
      height: 1px;
      background: var(--border);
    }

    .btn-google {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 11px 16px;
      border-radius: var(--r);
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--text);
      font-family: inherit;
      font-size: 14px;
      cursor: pointer;
      transition: all 0.18s;
      letter-spacing: 0.04em;
      box-shadow: var(--shadow);
    }

    .btn-google:hover {
      border-color: var(--accent);
      background: var(--surface2);
    }

    .btn-google svg {
      width: 18px;
      height: 18px;
      flex-shrink: 0;
    }

    .email-form {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .email-form input {
      padding: 10px 14px;
      border-radius: var(--r);
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--text);
      font-family: inherit;
      font-size: 14px;
      outline: none;
      transition: border-color 0.18s;
    }

    .email-form input:focus {
      border-color: var(--accent);
    }

    .email-form input::placeholder {
      color: var(--muted);
    }

    .btn-primary {
      padding: 10px 16px;
      border-radius: var(--r);
      border: none;
      background: var(--accent);
      color: #fff;
      font-family: inherit;
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: opacity 0.18s;
      letter-spacing: 0.05em;
    }

    .btn-primary:hover {
      opacity: 0.88;
    }

    .btn-primary:disabled {
      opacity: 0.45;
      cursor: not-allowed;
    }

    #login-msg {
      font-size: 11px;
      text-align: center;
      min-height: 16px;
      letter-spacing: 0.04em;
    }

    #login-msg.ok {
      color: var(--accent2);
    }

    #login-msg.err {
      color: var(--red);
    }

    /* code step */
    #code-step {
      display: none;
      flex-direction: column;
      gap: 10px;
    }

    #code-step.show {
      display: flex;
    }

    #email-step.hide {
      display: none;
    }

    /* ── Main App ─────────────────────────────────────── */
    #app {
      display: none;
    }

    #app.show {
      display: block;
    }

    /* ── Header ──────────────────────────────────────── */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(245, 239, 230, 0.93);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border);
      height: 52px;
      padding: 0 20px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .logo {
      font-family: "Noto Serif TC", serif;
      font-weight: 600;
      font-size: 14px;
      color: var(--accent);
      letter-spacing: 0.1em;
    }

    .header-right {
      margin-left: auto;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    #total-count {
      font-size: 16px;
      color: var(--muted);
    }

    #tag-mode-btn {
      padding: 5px 12px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 16px;
      cursor: pointer;
      transition: all 0.2s;
      letter-spacing: 0.05em;
    }

    #tag-mode-btn:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    #tag-mode-btn.active {
      border-color: var(--accent2);
      background: rgba(74, 140, 114, 0.1);
      color: var(--accent2);
    }

    #logout-btn {
      padding: 5px 12px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 16px;
      cursor: pointer;
      transition: all 0.2s;
    }

    #logout-btn:hover {
      border-color: var(--red);
      color: var(--red);
    }

    /* ── Filter Bar ───────────────────────────────────── */
    /* [CHANGE] 篩選欄位固定在 header 下方 */
    #filter-bar {
      position: sticky;
      top: 52px;
      z-index: 90;
      padding: 10px 20px;
      border-bottom: 1px solid var(--border);
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
      background: var(--surface);
    }

    /* [CHANGE] 搜尋欄位 */
    #search-filename-wrap {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 6px 12px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: var(--surface);
      box-shadow: var(--shadow);
      transition: border-color 0.18s;
    }

    #search-filename-wrap:focus-within {
      border-color: var(--accent);
    }

    #search-filename {
      border: none;
      background: transparent;
      color: var(--text);
      font-family: inherit;
      font-size: 16px;
      /* prevent iOS zoom on focus */
      outline: none;
      width: 140px;
    }

    #search-filename::placeholder {
      color: var(--muted);
    }

    .search-icon {
      font-size: 11px;
      color: var(--muted);
      pointer-events: none;
    }

    /* Popover trigger button */
    .filter-btn {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--muted);
      font-family: inherit;
      font-size: 16px;
      cursor: pointer;
      transition: all 0.18s;
      white-space: nowrap;
      position: relative;
      box-shadow: var(--shadow);
    }

    .filter-btn:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    .filter-btn.active {
      border-color: var(--accent);
      background: rgba(160, 98, 42, 0.08);
      color: var(--accent);
    }

    .filter-btn.active.people {
      border-color: var(--accent2);
      background: rgba(74, 140, 114, 0.08);
      color: var(--accent2);
    }

    .filter-btn .badge {
      position: absolute;
      top: -6px;
      right: -6px;
      background: var(--accent);
      color: #fff;
      border-radius: 10px;
      padding: 0 5px;
      font-size: 9px;
      line-height: 15px;
      min-width: 15px;
      text-align: center;
      pointer-events: none;
      border: 1.5px solid var(--surface);
    }

    .filter-btn.active.people .badge {
      background: var(--accent2);
    }

    .filter-chevron {
      font-size: 9px;
      opacity: 0.6;
    }

    /* Popover */
    .popover-wrap {
      position: relative;
    }

    .popover {
      display: none;
      position: absolute;
      top: calc(100% + 8px);
      left: 0;
      z-index: 200;
      min-width: 200px;
      max-width: 280px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--r);
      box-shadow: var(--shadow-lg);
      padding: 8px;
    }

    .popover.open {
      display: block;
    }

    .popover.right {
      left: auto;
      right: 0;
    }

    .popover-search {
      width: 100%;
      padding: 6px 10px;
      margin-bottom: 6px;
      border: 1px solid var(--border);
      border-radius: 6px;
      background: var(--bg);
      color: var(--text);
      font-family: inherit;
      font-size: 16px;
      /* prevent iOS zoom */
      outline: none;
    }

    .popover-search:focus {
      border-color: var(--accent);
    }

    .popover-search::placeholder {
      color: var(--muted);
    }

    .popover-list {
      max-height: 240px;
      overflow-y: auto;
      display: flex;
      flex-direction: column;
      gap: 1px;
    }

    .popover-list::-webkit-scrollbar {
      width: 4px;
    }

    .popover-list::-webkit-scrollbar-thumb {
      background: var(--border);
      border-radius: 2px;
    }

    .pop-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 6px 8px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 12px;
      color: var(--muted);
      transition: background 0.12s;
      user-select: none;
    }

    .pop-item:hover {
      background: var(--surface2);
      color: var(--text);
    }

    .pop-item.on {
      color: var(--accent);
      background: rgba(160, 98, 42, 0.07);
    }

    .pop-item.on.people {
      color: var(--accent2);
      background: rgba(74, 140, 114, 0.07);
    }

    /* [CHANGE] 未選時顯示空框，選中後才顯示打勾 */
    .pop-check {
      width: 14px;
      height: 14px;
      border-radius: 3px;
      border: 1.5px solid var(--border);
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 9px;
      transition: all 0.12s;
      color: transparent;
      /* 預設不顯示勾 */
    }

    .pop-item.on .pop-check {
      background: var(--accent);
      border-color: var(--accent);
      color: #fff;
    }

    .pop-item.on.people .pop-check {
      background: var(--accent2);
      border-color: var(--accent2);
      color: #fff;
    }

    .popover-clear {
      margin-top: 6px;
      padding: 5px 8px;
      width: 100%;
      border-radius: 6px;
      border: none;
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 12px;
      cursor: pointer;
      transition: color 0.15s;
      text-align: left;
      letter-spacing: 0.04em;
    }

    .popover-clear:hover {
      color: var(--red);
    }

    /* Quick toggle buttons for type & status */
    .filter-toggle {
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--muted);
      font-family: inherit;
      font-size: 12px;
      cursor: pointer;
      transition: all 0.18s;
      box-shadow: var(--shadow);
    }

    .filter-toggle:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    .filter-toggle.on {
      border-color: var(--accent);
      background: rgba(160, 98, 42, 0.08);
      color: var(--accent);
    }

    .filter-toggle.on.red {
      border-color: var(--red);
      background: rgba(184, 80, 80, 0.08);
      color: var(--red);
    }

    /* active filters summary */
    #filter-reset {
      padding: 5px 12px;
      border-radius: 20px;
      border: 1px solid var(--red);
      background: transparent;
      color: var(--red);
      font-family: inherit;
      font-size: 12px;
      cursor: pointer;
      transition: all 0.18s;
      display: none;
      letter-spacing: 0.04em;
    }

    #filter-reset.show {
      display: block;
    }

    #filter-reset:hover {
      background: rgba(184, 80, 80, 0.08);
    }

    /* ── Gallery ──────────────────────────────────────── */
    #gallery {
      padding: 20px;
    }

    /* [CHANGE] Masonry: JS absolute-position layout (row-first, Pinterest style) */
    #masonry {
      position: relative;
      width: 100%;
    }

    @media (max-width: 480px) {
      #gallery {
        padding: 8px;
      }
    }

    .card {
      position: absolute;
      border-radius: var(--r);
      overflow: hidden;
      background: var(--surface);
      cursor: pointer;
      opacity: 0;
      transform: translateY(12px);
      animation: fadeUp 0.35s forwards;
      box-shadow: var(--shadow);
      border: 1px solid var(--border);
      -webkit-user-select: none;
      user-select: none;
      -webkit-touch-callout: none;
    }

    .card.selectable:hover .select-check {
      opacity: 1;
    }

    .card.selected {
      outline: 2px solid var(--accent2);
      outline-offset: -2px;
    }

    .card.selected .select-check {
      opacity: 1;
      background: var(--accent2);
      border-color: var(--accent2);
    }

    .card.selected .check-icon {
      opacity: 1;
    }

    @keyframes fadeUp {
      to {
        opacity: 1;
        transform: none;
      }
    }

    .card img,
    .card video.cover {
      display: block;
      width: 100%;
      height: auto;
      transition: transform 0.4s;
    }

    .card:hover img,
    .card:hover video.cover {
      transform: scale(1.03);
    }

    .video-badge {
      position: absolute;
      top: 8px;
      left: 8px;
      background: rgba(60, 40, 20, 0.65);
      color: #fff;
      font-size: 9px;
      padding: 2px 7px;
      border-radius: 10px;
      letter-spacing: 0.06em;
      pointer-events: none;
    }

    .card-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(to top,
          rgba(50, 30, 10, 0.65) 0%,
          transparent 55%);
      opacity: 0;
      transition: opacity 0.3s;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 10px;
      gap: 4px;
      pointer-events: none;
    }

    .card:hover .card-overlay {
      opacity: 1;
    }

    .card-date {
      font-size: 9px;
      color: rgba(255, 245, 230, 0.8);
      letter-spacing: 0.05em;
    }

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 3px;
    }

    .ct {
      font-size: 9px;
      padding: 2px 6px;
      border-radius: 8px;
    }

    .ct.loc {
      background: rgba(160, 98, 42, 0.3);
      color: #f5d9b8;
    }

    .ct.person {
      background: rgba(74, 140, 114, 0.3);
      color: #b8e0d4;
    }

    .ct.tag {
      background: rgba(100, 90, 160, 0.3);
      color: #ccc8f0;
    }

    .select-check {
      position: absolute;
      top: 8px;
      right: 8px;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      border: 2px solid rgba(255, 255, 255, 0.7);
      background: rgba(80, 50, 20, 0.35);
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      transition: all 0.2s;
      pointer-events: none;
    }

    .check-icon {
      font-size: 12px;
      opacity: 0;
      transition: opacity 0.2s;
    }

    /* Skeleton */
    .skeleton {
      position: absolute;
      border-radius: var(--r);
      background: var(--surface2);
      animation: shimmer 1.5s infinite;
    }

    @keyframes shimmer {

      0%,
      100% {
        opacity: 0.5;
      }

      50% {
        opacity: 0.9;
      }
    }

    #empty {
      display: none;
      padding: 80px;
      text-align: center;
      color: var(--muted);
      font-size: 12px;
      letter-spacing: 0.08em;
    }

    #empty.show {
      display: block;
    }

    #sentinel {
      height: 1px;
    }

    #load-more-indicator {
      text-align: center;
      padding: 24px;
      font-size: 11px;
      color: var(--muted);
      display: none;
    }

    #load-more-indicator.show {
      display: block;
    }

    /* ── Tag Panel ────────────────────────────────────── */
    #tag-panel {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 150;
      background: rgba(253, 248, 242, 0.97);
      backdrop-filter: blur(16px);
      border-top: 1px solid var(--border);
      box-shadow: 0 -4px 20px rgba(80, 50, 20, 0.1);
      padding: 14px 20px calc(14px + var(--safe-area-bottom));
      gap: 12px;
      flex-wrap: wrap;
      align-items: center;
    }

    #tag-panel.show {
      display: flex;
    }

    #tag-panel-info {
      font-size: 12px;
      color: var(--muted);
      min-width: 80px;
    }

    #tag-panel-info span {
      color: var(--accent2);
    }

    /* [CHANGE] 全選按鈕 */
    #select-all-btn {
      padding: 5px 12px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 12px;
      cursor: pointer;
      transition: all 0.15s;
      white-space: nowrap;
    }

    #select-all-btn:hover {
      border-color: var(--accent2);
      color: var(--accent2);
    }

    #select-all-btn.active {
      border-color: var(--accent2);
      background: rgba(74, 140, 114, 0.12);
      color: var(--accent2);
    }

    .panel-people {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      flex: 1 1 100%;
    }

    .person-btn {
      padding: 5px 12px;
      border-radius: 20px;
      border: 1.5px dashed #8f8f8f;
      background: transparent;
      color: #7a7a7a;
      font-family: inherit;
      font-size: 11px;
      cursor: pointer;
      transition: all 0.15s;
    }

    .person-btn.default-person-chip {
      border-color: #9c9c9c;
      color: #7f7f7f;
    }

    .person-btn.default-person-chip:hover:not(.selected) {
      border-color: #8d8d8d;
      border-style: dashed;
      background: transparent;
      color: #727272;
    }

    .person-btn:hover {
      border-color: var(--accent2);
      border-style: solid;
      color: var(--accent2);
    }

    .person-btn.selected {
      border: 1.5px solid var(--accent2);
      background: var(--accent2);
      color: #fff;
    }

    #new-person-input {
      padding: 5px 12px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: var(--bg);
      color: var(--text);
      font-family: inherit;
      font-size: 12px;
      outline: none;
      width: 100px;
    }

    #new-person-input:focus {
      border-color: var(--accent2);
    }

    #new-person-input::placeholder {
      color: var(--muted);
    }

    #apply-tags-btn {
      padding: 6px 18px;
      border-radius: 20px;
      border: none;
      background: var(--accent2);
      color: #fff;
      font-family: inherit;
      font-size: 12px;
      font-weight: 600;
      cursor: pointer;
      transition: opacity 0.2s;
      letter-spacing: 0.05em;
    }

    #apply-tags-btn:hover {
      opacity: 0.85;
    }

    #apply-tags-btn:disabled {
      opacity: 0.4;
      cursor: not-allowed;
    }

    #cancel-tag-btn {
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 12px;
      cursor: pointer;
    }

    /* ── Lightbox ─────────────────────────────────────── */
    #lightbox {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 200;
      background: rgba(30, 20, 10, 0.95);
      grid-template-rows: 58px minmax(0, 1fr) auto;
      grid-template-columns: minmax(0, 1fr);
      gap: 8px;
      padding: 0 64px 16px;
      /* [CHANGE] touch-action for swipe */
      touch-action: pan-y;
      overflow: hidden;
    }

    #lightbox.open {
      display: grid;
    }

    #lb-toolbar {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      min-width: 0;
    }

    #lb-media {
      min-width: 0;
      min-height: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 10px;
    }

    #lb-img,
    #lb-video {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
      border-radius: 4px;
    }

    #lb-video {
      cursor: pointer;
      max-height: calc(100% - 44px);
    }

    #lb-video-controls {
      display: none;
      align-items: center;
      gap: 10px;
      width: min(100%, 920px);
      min-height: 34px;
      padding: 6px 10px;
      border: 1px solid rgba(200, 180, 150, 0.2);
      border-radius: 8px;
      background: rgba(40, 25, 10, 0.72);
      color: rgba(220, 200, 170, 0.86);
      backdrop-filter: blur(8px);
    }

    #lb-video-controls.show {
      display: flex;
    }

    .lb-video-time {
      flex: 0 0 auto;
      min-width: 44px;
      font-size: 11px;
      line-height: 1;
      text-align: center;
      color: rgba(220, 200, 170, 0.82);
    }

    #lb-video-progress {
      flex: 1 1 auto;
      min-width: 80px;
      accent-color: var(--accent);
      cursor: pointer;
    }

    #lb-video-fullscreen {
      flex: 0 0 auto;
      width: 28px;
      height: 28px;
      border: 1px solid rgba(200, 180, 150, 0.24);
      border-radius: 6px;
      background: rgba(255, 255, 255, 0.04);
      color: rgba(220, 200, 170, 0.9);
      cursor: pointer;
      font-family: inherit;
      font-size: 15px;
      line-height: 1;
    }

    #lb-video-fullscreen:hover {
      border-color: rgba(200, 180, 150, 0.55);
      color: #fff;
    }

    #lb-loading {
      color: var(--muted);
      font-size: 11px;
      letter-spacing: 0.1em;
    }

    #lb-close {
      background: none;
      border: 1px solid rgba(200, 180, 150, 0.3);
      color: rgba(200, 180, 150, 0.6);
      width: 34px;
      height: 34px;
      border-radius: 50%;
      cursor: pointer;
      font-size: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
    }

    #lb-close:hover {
      border-color: #fff;
      color: #fff;
    }

    .lb-nav {
      position: fixed;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(40, 25, 10, 0.7);
      border: 1px solid rgba(200, 180, 150, 0.2);
      color: rgba(200, 180, 150, 0.6);
      width: 42px;
      height: 42px;
      border-radius: 50%;
      cursor: pointer;
      font-size: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
    }

    .lb-nav:hover {
      border-color: rgba(200, 180, 150, 0.7);
      color: #fff;
    }

    #lb-prev {
      left: 14px;
    }

    #lb-next {
      right: 14px;
    }

    /* ── Lightbox info tags ───────────────────────────── */
    #lb-info {
      display: none;
      gap: 6px;
      align-items: center;
      flex-wrap: wrap;
      justify-content: center;
      max-height: 22vh;
      min-height: 32px;
      min-width: 0;
      overflow: auto;
      padding: 0 0 2px;
    }

    #lb-info.show {
      display: flex;
    }

    .lb-tag {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 5px 12px;
      border-radius: 20px;
      background: rgba(40, 25, 10, 0.85);
      border: 1px solid rgba(200, 180, 150, 0.2);
      backdrop-filter: blur(8px);
      font-size: 11px;
      white-space: nowrap;
      color: rgba(220, 200, 170, 0.85);
    }

    .lb-tag.accent {
      color: var(--accent);
      border-color: rgba(160, 98, 42, 0.4);
    }

    .lb-tag.accent2 {
      color: var(--accent2);
      border-color: rgba(74, 140, 114, 0.4);
    }

    /* ── Save indicator ───────────────────────────────── */
    #save-status {
      display: none;
      padding: 5px 12px;
      border-radius: 20px;
      font-size: 12px;
      letter-spacing: 0.04em;
      margin-left: auto;
      white-space: nowrap;
    }

    #save-status.saving {
      display: block;
      background: rgba(160, 98, 42, 0.12);
      border: 1px solid var(--accent);
      color: var(--accent);
    }

    #save-status.ok {
      display: block;
      background: rgba(74, 140, 114, 0.12);
      border: 1px solid var(--accent2);
      color: var(--accent2);
    }

    #save-status.err {
      display: block;
      background: rgba(184, 80, 80, 0.12);
      border: 1px solid var(--red);
      color: var(--red);
    }

    /* ── View Toggle ─────────────────────────────────── */
    #view-toggle {
      display: flex;
      gap: 2px;
      background: var(--surface2);
      border-radius: 6px;
      padding: 2px;
    }

    .view-btn {
      width: 28px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: none;
      background: transparent;
      color: var(--muted);
      border-radius: 4px;
      cursor: pointer;
      transition: all 0.15s;
    }

    .view-btn.active {
      background: var(--surface);
      color: var(--accent);
    }

    /* ── List View ───────────────────────────────────── */
    #gallery {
      display: none;
    }

    #gallery.show {
      display: block;
    }

    #list-view {
      display: none;
    }

    #list-view.show {
      display: block;
    }

    #list-container {
      padding: 8px 0;
    }

    body.tag-mode-active #gallery,
    body.tag-mode-active #list-view {
      padding-bottom: calc(var(--tag-panel-height, 0px) + 40px);
    }

    .list-row {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 20px;
      border-bottom: 0.5px solid var(--border);
      cursor: pointer;
      transition: background 0.12s;
      animation: fadeUp 0.25s forwards;
      opacity: 0;
    }

    .list-row:hover {
      background: var(--surface);
    }

    .list-row-meta {
      flex: 1;
      min-width: 0;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .list-row-filename {
      font-size: 16px;
      color: var(--text);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      flex-shrink: 1;
      min-width: 0;
    }

    .list-row-tags {
      display: flex;
      flex-wrap: nowrap;
      gap: 4px;
      flex-shrink: 0;
    }

    /* 列表的字卡比瀑布流大，顏色用深色背景+白字 */
    .list-row-tags .ct {
      font-size: 16px;
      padding: 3px 9px;
    }

    .list-row-tags .ct.loc {
      background: rgba(160, 98, 42, 0.75);
      color: #fff;
    }

    .list-row-tags .ct.person {
      background: rgba(74, 140, 114, 0.75);
      color: #fff;
    }

    .list-row-tags .ct.tag {
      background: rgba(100, 90, 160, 0.75);
      color: #fff;
    }

    .list-row-tags .ct.date {
      background: rgba(80, 60, 40, 0.18);
      color: var(--text);
    }

    /* 列表勾選框 */
    .list-check {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      border: 2px solid var(--border);
      background: var(--surface);
      display: none;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      transition: all 0.15s;
      font-size: 11px;
      color: transparent;
    }

    .list-row.selectable .list-check {
      display: flex;
    }

    .list-row.selected .list-check {
      background: var(--accent2);
      border-color: var(--accent2);
      color: #fff;
    }

    #list-empty {
      display: none;
      padding: 80px;
      text-align: center;
      color: var(--muted);
      font-size: 12px;
      letter-spacing: 0.08em;
    }

    #list-empty.show {
      display: block;
    }

    #list-sentinel {
      height: 1px;
    }

    #list-load-more-indicator {
      text-align: center;
      padding: 24px;
      font-size: 11px;
      color: var(--muted);
      display: none;
    }

    #list-load-more-indicator.show {
      display: block;
    }

    /* ── Mobile: smaller filter chips ───────────────── */
    @media (max-width: 600px) {
      .login-card {
        padding: 28px 20px;
      }

      #filter-bar {
        padding: 8px 12px;
        top: 52px;
      }

      /* 篩選按鈕手機縮小 */
      .filter-btn,
      .filter-toggle {
        font-size: 10px;
        padding: 4px 8px;
        gap: 3px;
      }

      .filter-chevron {
        font-size: 8px;
      }

      /* 搜尋+未標記 獨佔第一行 */
      #search-filename-wrap {
        order: 1;
        flex: 1;
      }

      #wrap-untagged {
        order: 2;
      }

      /* flex break 強制換行 */
      #filter-bar::after {
        content: "";
        order: 2;
        width: 100%;
        height: 0;
        flex-basis: 100%;
      }

      /* 年份/日期/國家/地點/人物/標籤 第二行 */
      #wrap-year,
      #wrap-date,
      #wrap-country,
      #wrap-location,
      #wrap-people,
      #wrap-tags {
        order: 3;
      }

      /* 清除全部篩選 最後 */
      #filter-reset {
        order: 4;
        margin-left: 0;
        width: 100%;
      }

      /* 儲存狀態手機版也排最後 */
      #save-status {
        order: 5;
        margin-left: 0;
        width: 100%;
      }

      #gallery {
        padding: 8px;
      }

      header {
        padding: 0 8px;
        gap: 6px;
      }

      .header-right {
        gap: 5px;
      }

      #total-count {
        font-size: 11px;
        white-space: nowrap;
      }

      #tag-mode-btn,
      #logout-btn {
        padding: 4px 8px;
        font-size: 11px;
        white-space: nowrap;
      }

      .popover {
        max-width: 90vw;
        position: fixed;
        top: auto;
        left: 12px !important;
        right: 12px !important;
        width: calc(100vw - 24px);
        max-width: calc(100vw - 24px);
      }

      /* [CHANGE] 手機版 lb-nav 小一點不遮圖片 */
      .lb-nav {
        width: 34px;
        height: 34px;
        font-size: 16px;
      }

      #lb-prev {
        left: 6px;
      }

      #lb-next {
        right: 6px;
      }

      #lightbox {
        grid-template-rows: 48px minmax(0, 1fr) auto;
        gap: 6px;
        padding: 0 44px 10px;
      }

      #lb-info {
        max-height: 24vh;
      }

      .list-row {
        padding: 8px 12px;
      }

      .list-row-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
      }

      .list-row-filename {
        font-size: 12px;
      }

      .list-row-tags {
        flex-wrap: wrap;
      }

      .list-row-tags .ct {
        font-size: 12px;
        padding: 2px 7px;
      }

      /* 篩選字卡手機 12px */
      .filter-btn,
      .filter-toggle {
        font-size: 12px;
        padding: 4px 8px;
        gap: 3px;
      }
    }

    /* OR/AND toggle in tags/people popover */
    #tags-mode-toggle,
    #people-mode-toggle,
    #untagged-mode-toggle {
      display: flex;
      gap: 4px;
      margin-bottom: 6px;
      padding: 0 2px;
    }

    .tags-op-btn,
    .people-op-btn,
    .untagged-op-btn {
      flex: 1;
      padding: 4px 0;
      border-radius: 6px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 11px;
      cursor: pointer;
      transition: all 0.15s;
      letter-spacing: 0.05em;
    }

    .tags-op-btn.active,
    .people-op-btn.active,
    .untagged-op-btn.active {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }

    /* 三態：排除狀態 (exclude) */
    .pop-item.exclude {
      color: var(--red);
      background: rgba(184, 80, 80, 0.07);
    }

    .pop-item.exclude .pop-check {
      background: var(--red);
      border-color: var(--red);
      color: #fff;
    }

    /* AND 模式下才顯示三態提示文字 */
    .popover-tri-hint {
      font-size: 10px;
      color: var(--muted);
      padding: 0 2px 4px;
      letter-spacing: 0.03em;
      display: none;
    }

    .and-mode .popover-tri-hint {
      display: block;
    }

    /* Tag panel mode toggle (人物 / 標籤) */
    #tag-panel-mode {
      display: flex;
      flex-shrink: 0;
      border: 1px solid var(--border);
      border-radius: 20px;
      overflow: hidden;
      background: var(--surface2);
    }

    .panel-mode-btn {
      padding: 5px 14px;
      border: none;
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 12px;
      cursor: pointer;
      transition: all 0.15s;
      letter-spacing: 0.03em;
    }

    .panel-mode-btn.active {
      background: var(--accent2);
      color: #fff;
      border-radius: 20px;
    }

    /* tag chips in panel */
    .tag-chip-btn {
      padding: 5px 12px;
      border-radius: 20px;
      border: 1.5px dashed var(--border);
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 11px;
      cursor: pointer;
      transition: all 0.15s;
    }

    .tag-chip-btn:hover {
      border-color: #6459a0;
      border-style: solid;
      color: #6459a0;
    }

    .tag-chip-btn.selected {
      border: 1.5px solid #6459a0;
      background: #6459a0;
      color: #fff;
    }

    /* ── Tag Panel action mode toggle (新增 / 刪除) ─── */
    #tag-action-mode {
      display: flex;
      flex-shrink: 0;
      border: 1px solid var(--border);
      border-radius: 20px;
      overflow: hidden;
      background: var(--surface2);
    }

    .action-mode-btn {
      padding: 5px 14px;
      border: none;
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 12px;
      cursor: pointer;
      transition: all 0.15s;
      letter-spacing: 0.03em;
    }

    .action-mode-btn.active[data-action="add"] {
      background: var(--accent2);
      color: #fff;
      border-radius: 20px;
    }

    .action-mode-btn.active[data-action="remove"] {
      background: var(--red);
      color: #fff;
      border-radius: 20px;
    }

    /* 刪除模式下，有標籤的 chip 才顯示，無標籤時顯示提示 */
    #delete-panel-hint {
      font-size: 11px;
      color: var(--muted);
      letter-spacing: 0.04em;
      display: none;
    }

    /* 刪除模式下 chip：未選是虛線紅、已選是實心紅 */
    .person-btn.delete-mode {
      border-style: dashed;
      border-color: rgba(184, 80, 80, 0.4);
      color: rgba(184, 80, 80, 0.7);
    }

    .person-btn.delete-mode:hover {
      border-color: var(--red);
      border-style: solid;
      color: var(--red);
    }

    .person-btn.delete-mode.selected {
      border: 1.5px solid var(--red);
      background: var(--red);
      color: #fff;
    }

    .tag-chip-btn.delete-mode {
      border-style: dashed;
      border-color: rgba(184, 80, 80, 0.4);
      color: rgba(184, 80, 80, 0.7);
    }

    .tag-chip-btn.delete-mode:hover {
      border-color: var(--red);
      border-style: solid;
      color: var(--red);
    }

    .tag-chip-btn.delete-mode.selected {
      border: 1.5px solid var(--red);
      background: var(--red);
      color: #fff;
    }

    /* ── Panel input (選既有 + 新增輸入) ─────────────────── */
    #panel-input-wrap {
      display: flex;
      gap: 6px;
      flex-shrink: 0;
      min-width: 0;
    }

    #panel-existing-select,
    #panel-new-input,
    #panel-add-input-btn {
      min-width: 0;
      padding: 5px 14px;
      border-radius: 20px;
      border: 1px solid var(--border);
      background: var(--bg);
      color: var(--text);
      font-family: inherit;
      font-size: 12px;
      line-height: 1.2;
      outline: none;
      transition: border-color 0.18s;
    }

    #panel-existing-select {
      width: 112px;
      cursor: pointer;
    }

    #panel-new-input {
      width: 116px;
      font-size: 16px;
      padding-top: 1px;
      padding-bottom: 1px;
    }

    #panel-add-input-btn {
      width: 32px;
      flex: 0 0 32px;
      padding-left: 0;
      padding-right: 0;
      background: var(--accent2);
      color: #fff;
      border-color: var(--accent2);
      cursor: pointer;
      touch-action: manipulation;
    }

    #panel-existing-select:focus,
    #panel-new-input:focus,
    #panel-add-input-btn:focus {
      border-color: var(--accent2);
    }

    #panel-new-input::placeholder {
      color: var(--muted);
      font-size: 12px;
    }

    /* 最近使用分隔線（保留結構但不再使用） */
    .panel-divider {
      width: 1px;
      height: 18px;
      background: var(--border);
      flex-shrink: 0;
      align-self: center;
    }

    /* ── Mobile tag panel 3-row layout ──────────────── */
    @media (max-width: 600px) {
      #tag-panel {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        padding: 10px 12px calc(20px + var(--safe-area-bottom));
      }

      #tag-panel-row1 {
        display: flex;
        flex-wrap: nowrap;
        align-items: center;
        gap: 4px;
        overflow-x: auto;
      }

      #tag-panel-info {
        white-space: nowrap;
        font-size: 11px;
        min-width: unset;
      }

      #select-all-btn {
        padding: 4px 8px;
        font-size: 11px;
        white-space: nowrap;
      }

      .panel-mode-btn {
        padding: 4px 10px;
        font-size: 11px;
      }

      .action-mode-btn {
        padding: 4px 10px;
        font-size: 11px;
      }

      #tag-panel-row2 {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        position: relative;
        min-width: 0;
      }

      #tag-panel-row3 {
        display: flex;
        gap: 8px;
      }

      #tag-panel-row3 #apply-tags-btn {
        flex: 1;
      }

      #tag-panel-row3 #cancel-tag-btn {
        flex: 1;
      }

      #panel-input-wrap {
        flex: 1;
        gap: 4px;
        justify-content: flex-start;
      }

      #panel-existing-select {
        flex: 0 0 92px;
        width: auto !important;
        padding: 4px 8px;
        font-size: 11px;
      }

      #panel-new-input {
        flex: 0 0 98px;
        width: auto !important;
        padding: 1px 8px;
        font-size: 16px;
      }

      #panel-add-input-btn {
        width: 28px;
        flex: 0 0 28px;
        padding: 4px 0;
        font-size: 11px;
      }

      /* 手機版 chips 區域：依模式顯示待新增或可刪除項目 */
      #panel-people-btns,
      #panel-tags-btns {
        display: none;
      }

      #panel-people-btns.add-mode-visible,
      #panel-tags-btns.add-mode-visible,
      #panel-people-btns.delete-mode-visible,
      #panel-tags-btns.delete-mode-visible {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
      }

      .panel-people {
        display: none;
      }

      .panel-people.add-mode-visible,
      .panel-people.delete-mode-visible {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
      }

      /* delete hint stays in row1 */
      #delete-panel-hint {
        width: 100%;
      }
    }

    /* Desktop: structured layout with buttons pinned right */
    @media (min-width: 601px) {
      #tag-panel {
        flex-wrap: nowrap;
        align-items: center;
      }

      #tag-panel-row1 {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
      }

      #tag-panel-row2 {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
        flex: 1;
        min-width: 0;
        position: relative;
      }

      #tag-panel-row2 .panel-people {
        width: 100%;
      }

      #tag-panel-row3 {
        display: flex;
        align-items: center;
        gap: 8px;
        flex-shrink: 0;
        margin-left: auto;
      }
    }

    /* ── Year Separator ─────────────────────────────── */
    .year-separator {
      position: absolute;
      left: 0;
      right: 0;
      display: flex;
      align-items: center;
      pointer-events: none;
      z-index: 10;
    }

    .year-separator-label {
      font-family: "DM Mono", monospace;
      font-size: 11px;
      letter-spacing: 0.12em;
      color: var(--muted);
      white-space: nowrap;
      flex-shrink: 0;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 3px 12px;
    }

    .year-separator-gap {
      flex-shrink: 0;
      width: 10px;
    }

    .year-separator-line {
      flex: 1;
      height: 1px;
      background: var(--border);
    }

    /* ── Sticky Year Indicator ───────────────────────── */
    #year-indicator {
      position: fixed;
      top: 0;
      left: 0;
      z-index: 85;
      pointer-events: none;
      display: none;
    }

    #year-indicator.show {
      display: flex;
      align-items: center;
    }

    #year-indicator-text {
      display: inline-block;
      font-family: "DM Mono", monospace;
      font-size: 11px;
      letter-spacing: 0.12em;
      color: var(--muted);
      background: rgba(245, 239, 230, 0.92);
      backdrop-filter: blur(8px);
      padding: 3px 12px 3px 20px;
      border-radius: 0 20px 20px 0;
      border: 1px solid var(--border);
      border-left: none;
    }

    #year-indicator-line {
      display: none;
      height: 1px;
      background: var(--border);
    }

    /* ── Scroll Buttons ──────────────────────────────── */
    .scroll-btn {
      position: fixed;
      right: 20px;
      z-index: 120;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--muted);
      font-size: 16px;
      cursor: pointer;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
    }

    .scroll-btn:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: var(--surface2);
    }

    #scroll-top-btn {
      bottom: calc(84px + var(--safe-area-bottom));
    }

    #scroll-bottom-btn {
      bottom: calc(36px + var(--safe-area-bottom));
    }