:root {
  --color-bg: #ffffff;
  --color-mint: #bdeee3;
  --color-mint-dark: #5cc6b3;
  --color-mint-deep: #3aa992;
  --color-pink: #f6d3dd;
  --color-pink-dark: #ef9db3;
  --color-pink-deep: #e07a97;
  --color-text: #3a3a3a;
  --color-text-light: #8c8c8c;
  --color-border: #ececec;
  --color-card-bg: #ffffff;
  --color-panel-bg: #fbfbfb;

  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;

  --shadow-card: 0 4px 18px rgba(60, 60, 60, 0.08);
  --shadow-float: 0 8px 28px rgba(60, 60, 60, 0.14);

  --transition-fast: 0.15s ease;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

button:active {
  transform: scale(0.96);
}

input {
  font-family: inherit;
}

.btn {
  transition: transform var(--transition-fast), opacity var(--transition-fast), background var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-pink-dark), var(--color-pink-deep));
  color: #fff;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 999px;
  box-shadow: var(--shadow-card);
}

.btn-primary:disabled {
  background: #e6e6e6;
  color: #aaa;
  box-shadow: none;
  cursor: default;
}

.btn-secondary {
  background: var(--color-mint);
  color: #1c6a5c;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 999px;
}

.btn-ghost {
  background: #f2f2f2;
  color: var(--color-text);
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 500;
}

.btn-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f4f4f4;
}

/* ============ ログイン画面 ============ */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, #fdf6f8 0%, #f2fbf9 100%);
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-card-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-float);
  padding: 44px 36px;
  text-align: center;
}

.login-logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-pink-deep);
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  font-style: italic;
}

.login-sub {
  color: var(--color-text-light);
  font-size: 13px;
  margin-bottom: 32px;
}

.login-field {
  text-align: left;
  margin-bottom: 18px;
}

.login-field label {
  display: block;
  font-size: 12px;
  color: var(--color-text-light);
  margin-bottom: 6px;
  font-weight: 600;
}

.login-field input {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  font-size: 15px;
  background: var(--color-panel-bg);
}

.login-field input:focus {
  border-color: var(--color-mint-dark);
  background: #fff;
}

.login-btn {
  width: 100%;
  margin-top: 10px;
  font-size: 15px;
}

.login-error {
  color: var(--color-pink-deep);
  font-size: 13px;
  margin-top: 14px;
  min-height: 18px;
}

/* ============ アプリ全体レイアウト ============ */
.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--color-border);
  background: #fff;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.topbar-logo {
  font-weight: 700;
  font-style: italic;
  color: var(--color-pink-deep);
  font-size: 20px;
  white-space: nowrap;
}

.folder-select {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--color-panel-bg);
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.topbar-spacer {
  flex: 1;
}

.select-count {
  font-size: 13px;
  color: var(--color-text-light);
  background: #f4f4f4;
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 600;
}

.main-area {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

.photo-grid-wrap {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px 100px;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

@media (min-width: 900px) {
  .photo-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
@media (min-width: 1300px) {
  .photo-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.photo-card {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #f4f4f4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast);
}

.photo-card:active {
  transform: scale(0.97);
}

.photo-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #f4f4f4;
  display: block;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.photo-card img.loaded {
  opacity: 1;
}

.photo-checkbox {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  border: 2px solid #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.photo-checkbox.checked {
  background: var(--color-pink-deep);
  border-color: var(--color-pink-deep);
  color: #fff;
}

.photo-card.is-registered {
  box-shadow: 0 0 0 3px var(--color-mint-dark), var(--shadow-card);
}

.photo-card .registered-badge {
  position: absolute;
  bottom: 6px;
  left: 6px;
  right: 6px;
  background: rgba(60, 60, 60, 0.72);
  color: #fff;
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 999px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.empty-state {
  text-align: center;
  color: var(--color-text-light);
  padding: 80px 20px;
  font-size: 14px;
}

/* ============ 右側：登録先フォルダパネル ============ */
.dest-panel {
  width: 260px;
  flex-shrink: 0;
  border-left: 1px solid var(--color-border);
  background: var(--color-panel-bg);
  padding: 18px 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.dest-panel h3 {
  font-size: 14px;
  margin: 0 0 12px;
  color: var(--color-text);
}

.dest-new-folder-btn {
  color: var(--color-mint-deep);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
  text-align: left;
}

.dest-tree {
  flex: 1;
  overflow-y: auto;
}

.dest-node {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 6px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
}

.dest-node:hover {
  background: #f0f0f0;
}

.dest-node.selected {
  background: var(--color-mint);
}

.dest-node .dest-radio {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 2px solid #ccc;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
}

.dest-node.selected .dest-radio {
  border-color: var(--color-mint-deep);
  background: var(--color-mint-deep);
  color: #fff;
}

.dest-node .dest-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dest-children {
  margin-left: 18px;
}

.dest-add-btn {
  width: 100%;
  margin-top: 12px;
}

/* ============ 下部ボトムナビ ============ */
.bottom-nav {
  display: flex;
  border-top: 1px solid var(--color-border);
  background: #fff;
  flex-shrink: 0;
}

.bottom-nav button {
  flex: 1;
  padding: 10px 4px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  color: var(--color-text-light);
  font-size: 11px;
  font-weight: 600;
}

.bottom-nav button.active {
  color: var(--color-pink-deep);
}

.bottom-nav svg {
  width: 22px;
  height: 22px;
}

/* ============ 選択バー（下部固定） ============ */
.selection-bar {
  position: fixed;
  left: 50%;
  bottom: 78px;
  transform: translateX(-50%);
  background: #2e2e2e;
  color: #fff;
  padding: 10px 10px 10px 20px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-float);
  z-index: 40;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.selection-bar.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(20px);
}

.selection-bar span {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.selection-bar button {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ============ フォルダ管理画面（フォルダタブ） ============ */
.folder-manage-view {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px 100px;
  max-width: 640px;
  margin: 0 auto;
  width: 100%;
}

.folder-manage-view h2 {
  font-size: 16px;
  margin-bottom: 16px;
}

.fm-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--color-panel-bg);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
}

.fm-row .fm-name {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
}

.fm-row .fm-count {
  font-size: 12px;
  color: var(--color-text-light);
}

.fm-actions {
  display: flex;
  gap: 6px;
}

.fm-actions button {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: #eee;
}

.fm-hint {
  font-size: 12px;
  color: var(--color-text-light);
  margin: -8px 0 14px;
}

.fm-name {
  cursor: pointer;
}

.fm-photos-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.fm-photos-header h2 {
  margin: 0;
  font-size: 15px;
}

.fm-new-row {
  display: flex;
  gap: 8px;
  margin: 16px 0;
}

.fm-new-row input {
  flex: 1;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
}

/* ============ 検索画面 ============ */
.search-view {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px 100px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-panel-bg);
  border: 1.5px solid var(--color-border);
  border-radius: 999px;
  padding: 12px 18px;
  margin-bottom: 18px;
  max-width: 480px;
}

.search-box input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  outline: none;
}

/* ============ 設定画面 ============ */
.settings-view {
  flex: 1;
  padding: 30px 24px;
  max-width: 420px;
  margin: 0 auto;
  width: 100%;
}

.settings-card {
  background: var(--color-panel-bg);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.settings-card .u-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.settings-card .u-role {
  font-size: 12px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.settings-note {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 18px;
  line-height: 1.6;
}

/* ============ ユーザー管理画面 ============ */
.user-manage-view {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px 100px;
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

.um-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.um-header h2 {
  flex: 1;
  font-size: 16px;
  margin: 0;
}

.um-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--color-panel-bg);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
}

.um-row .um-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-mint);
  color: #1c6a5c;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.um-row .um-info {
  flex: 1;
  min-width: 0;
}

.um-row .um-name-line {
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.um-role-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-pink);
  color: #a6425f;
  font-weight: 700;
}

.um-role-badge.admin {
  background: var(--color-mint);
  color: #1c6a5c;
}

.um-row .um-id {
  font-size: 12px;
  color: var(--color-text-light);
}

.um-row .um-folders {
  font-size: 11px;
  color: var(--color-text-light);
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.um-row .um-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.um-row .um-actions button {
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 12px;
  background: #eee;
  white-space: nowrap;
}

.um-row .um-actions button.danger {
  background: #fbe4e8;
  color: #c2445a;
}

.user-modal-box {
  max-width: 420px;
  max-height: 85vh;
  overflow-y: auto;
}

.um-field {
  margin-bottom: 16px;
  text-align: left;
}

.um-field label {
  display: block;
  font-size: 12px;
  color: var(--color-text-light);
  margin-bottom: 6px;
  font-weight: 600;
}

.um-role-toggle {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
}

.um-folder-tree {
  max-height: 220px;
  overflow-y: auto;
  background: var(--color-panel-bg);
  border-radius: var(--radius-md);
  padding: 10px;
  border: 1px solid var(--color-border);
}

.um-folder-node {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 4px;
  font-size: 13px;
}

.um-folder-children {
  margin-left: 20px;
}


.viewer-overlay {
  position: fixed;
  inset: 0;
  background: #111;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.viewer-header {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  flex-shrink: 0;
  gap: 14px;
}

.viewer-header-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: #fff;
}

.viewer-header-center span {
  font-size: 13px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.12);
  padding: 7px 16px;
  border-radius: 999px;
}

.viewer-header-center button {
  background: var(--color-pink-dark);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 999px;
}

.viewer-header .btn-icon {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.viewer-body {
  flex: 1;
  display: flex;
  min-height: 0;
}

.viewer-image-area {
  width: 80%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  touch-action: none;
  background: #111;
}

.viewer-image-area img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  transition: transform 0.15s ease;
}

.viewer-top-banner {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 6;
  text-align: center;
  padding: 10px 16px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}

.viewer-top-banner .badge-mint {
  background: var(--color-mint-dark);
  padding: 5px 14px;
  border-radius: 999px;
  display: inline-block;
}

.viewer-select-checkbox {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 6;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  border: 2px solid #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #333;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.viewer-select-checkbox.checked {
  background: var(--color-pink-deep);
  border-color: var(--color-pink-deep);
  color: #fff;
}

.viewer-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.viewer-nav-btn.prev {
  left: 12px;
}
.viewer-nav-btn.next {
  right: 12px;
}

.viewer-side-panel {
  width: 20%;
  min-width: 200px;
  background: #1c1c1c;
  color: #fff;
  padding: 18px 14px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.viewer-side-panel h3 {
  font-size: 13px;
  color: #ddd;
  margin: 0 0 10px;
}

.viewer-side-panel .dest-node {
  color: #eee;
}
.viewer-side-panel .dest-node:hover {
  background: rgba(255, 255, 255, 0.08);
}
.viewer-side-panel .dest-node.selected {
  background: rgba(93, 198, 179, 0.35);
}
.viewer-side-panel .dest-new-folder-btn {
  color: var(--color-mint);
}

.viewer-registered-tag {
  font-size: 12px;
  background: rgba(255, 255, 255, 0.1);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  line-height: 1.5;
}

.viewer-filmstrip {
  flex-shrink: 0;
  display: flex;
  gap: 8px;
  padding: 10px 14px;
  overflow-x: auto;
  background: #000;
}

.viewer-filmstrip .fs-thumb {
  width: 56px;
  height: 56px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  border: 2px solid transparent;
  opacity: 0.55;
  position: relative;
}

.viewer-filmstrip .fs-thumb.active {
  border-color: var(--color-pink-dark);
  opacity: 1;
}

.viewer-filmstrip .fs-thumb.fs-registered {
  box-shadow: inset 0 0 0 2px var(--color-mint-dark);
}

.viewer-filmstrip .fs-check {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-pink-deep);
  color: #fff;
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.viewer-filmstrip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 700px) {
  .viewer-body {
    flex-direction: column;
  }
  .viewer-image-area {
    width: 100%;
    height: 65%;
  }
  .viewer-side-panel {
    width: 100%;
    height: 35%;
    min-width: 0;
  }
}

/* ============ モーダル共通 ============ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-box {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 100%;
  max-width: 340px;
  box-shadow: var(--shadow-float);
}

.modal-box h3 {
  margin: 0 0 16px;
  font-size: 15px;
}

.modal-box input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  font-size: 14px;
  margin-bottom: 16px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #2e2e2e;
  color: #fff;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 13px;
  z-index: 300;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
}

.loading-spinner {
  text-align: center;
  padding: 40px;
  color: var(--color-text-light);
  font-size: 13px;
}