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

html, body {
  background: var(--bg);
  color: var(--accent);
  font-family: system-ui, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  overflow-x: auto;
  scrollbar-width: none;
}

nav::-webkit-scrollbar {
  display: none;
}

.nav-brand {
  font-weight: 800;
  font-size: 14px;
  color: var(--accent);
  padding: 14px 16px 14px 0;
  border-right: 1px solid var(--border);
  margin-right: 8px;
  white-space: nowrap;
  flex-shrink: 0;
}

nav a {
  display: block;
  padding: 14px 12px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s;
}

nav a:hover {
  color: var(--accent);
}

nav a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 700;
}

.nav-right {
  margin-left: auto;
  padding-left: 16px;
  flex-shrink: 0;
}

.dark-toggle {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  transition: border-color 0.15s, color 0.15s;
}

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

.page {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.signin-wrap {
  min-height: calc(100vh - 49px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.signin-card {
  width: 100%;
  max-width: 360px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px;
  background: var(--card);
  box-shadow: 0 8px 24px var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  text-align: center;
}

.signin-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--accent);
}

.signin-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.signin-divider {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  color: var(--muted2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

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

.signin-input {
  width: 100%;
  padding: 9px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--accent);
  background: var(--input-bg);
  outline: none;
  transition: border-color 0.15s;
  -webkit-user-select: text;
  user-select: text;
}

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

.signin-input::placeholder {
  color: var(--muted2);
}

.signin-fields {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn-email {
  width: 100%;
  padding: 11px 14px;
  border-radius: 8px;
  border: none;
  background: var(--highlight-bg);
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
  color: var(--highlight-color);
  transition: opacity 0.15s;
}

.btn-email:hover {
  opacity: 0.8;
}

.signin-toggle {
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.signin-error {
  font-size: 12px;
  color: #e53935;
  min-height: 14px;
  width: 100%;
  text-align: center;
}

.btn-google {
  width: 100%;
  padding: 11px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.btn-google:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px var(--shadow);
}

.google-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.collection-screen {
  display: none;
}

.collection-screen.active {
  display: block;
}

.collection-header {
  padding: 40px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.collection-header-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.collection-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted2);
}

.collection-title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--accent);
}

.collection-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.user-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 6px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
}

.user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}

.btn {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  font-weight: 700;
  font-size: 12px;
  color: var(--accent);
  transition: opacity 0.15s;
  white-space: nowrap;
}

.btn:hover {
  opacity: 0.7;
}

.btn.primary {
  background: var(--highlight-bg);
  color: var(--highlight-color);
  border: none;
}

.device-banner {
  display: none;
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 12px;
  color: #5d4037;
  line-height: 1.5;
  margin-bottom: 24px;
}

.device-banner.visible {
  display: block;
}

.device-banner strong {
  font-weight: 800;
  display: block;
  margin-bottom: 2px;
}

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

.section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted2);
  white-space: nowrap;
}

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

.section-wrap {
  margin-bottom: 40px;
}

.empty-state {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 48px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.empty-title {
  font-size: 14px;
  font-weight: 800;
  color: var(--accent);
}

.empty-desc {
  font-size: 12px;
  color: var(--muted2);
  max-width: 280px;
  line-height: 1.5;
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.game-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.game-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px var(--shadow);
}

.game-cover {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--input-bg);
  display: block;
}

.game-cover-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--input-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--muted2);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.game-info {
  padding: 10px 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.game-name {
  font-size: 12px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.3;
  word-break: break-word;
}

.game-system-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--tag-color);
  align-self: flex-start;
}

.game-actions {
  display: flex;
  gap: 6px;
  margin-top: auto;
}

.game-play-btn {
  flex: 1;
  padding: 7px;
  border-radius: 6px;
  background: var(--highlight-bg);
  color: var(--highlight-color);
  border: none;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s;
}

.game-play-btn:hover {
  opacity: 0.75;
}

.game-play-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.game-remove-btn {
  padding: 7px 9px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted2);
  font-size: 11px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.game-remove-btn:hover {
  border-color: #e53935;
  color: #e53935;
}

.game-rom-btn {
  width: 100%;
  padding: 7px;
  border-radius: 6px;
  background: transparent;
  border: 1px dashed var(--border);
  color: var(--muted2);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
  position: relative;
  overflow: hidden;
  text-align: center;
}

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

.game-rom-btn input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 9000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border-radius: 10px;
  border: 1px solid var(--border);
  box-shadow: 0 24px 48px var(--shadow);
  overflow: hidden;
}

.modal-header {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 14px;
  font-weight: 800;
  color: var(--accent);
}

.modal-close {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.modal-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  display: block;
  margin-bottom: 6px;
}

.modal-input {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--accent);
  background: var(--input-bg);
  outline: none;
  transition: border-color 0.15s;
  -webkit-user-select: text;
  user-select: text;
}

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

.modal-input::placeholder {
  color: var(--muted2);
}

.modal-select {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--accent);
  background: var(--input-bg);
  outline: none;
  cursor: pointer;
}

.modal-file-drop {
  padding: 20px;
  border-radius: 8px;
  border: 1px dashed var(--border);
  text-align: center;
  font-size: 12px;
  color: var(--muted2);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: border-color 0.15s, color 0.15s;
}

.modal-file-drop:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.modal-file-drop.has-file {
  border-color: #4caf50;
  color: #2e7d32;
}

.modal-file-drop input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.modal-file-name {
  font-size: 11px;
  color: #4caf50;
  margin-top: 4px;
  font-weight: 600;
}

.modal-status {
  font-size: 11px;
  color: #e53935;
  min-height: 14px;
  padding: 0 18px;
}

.modal-footer {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.loading-state {
  padding: 48px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--muted2);
}

@media (max-width: 600px) {
  .game-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .collection-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

    .collection-toolbar {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 32px;
      flex-wrap: wrap;
    }

    .search-input {
      flex: 1;
      min-width: 180px;
      padding: 8px 12px;
      border-radius: 8px;
      border: 1px solid var(--border);
      background: var(--input-bg);
      color: var(--accent);
      font-size: 13px;
      outline: none;
      transition: border-color 0.15s;
      -webkit-user-select: text;
      user-select: text;
    }
    .search-input:focus { border-color: var(--accent); }
    .search-input::placeholder { color: var(--muted2); }

    .import-folder-btn {
      padding: 8px 14px;
      border-radius: 8px;
      border: 1px solid var(--border);
      background: var(--card);
      cursor: pointer;
      font-weight: 700;
      font-size: 12px;
      color: var(--accent);
      transition: opacity 0.15s;
      white-space: nowrap;
      position: relative;
      overflow: hidden;
    }
    .import-folder-btn:hover { opacity: 0.7; }
    .import-folder-btn input[type="file"] {
      position: absolute;
      inset: 0;
      opacity: 0;
      cursor: pointer;
      width: 100%;
      height: 100%;
    }

    .user-avatar {
      cursor: pointer;
      transition: opacity 0.15s;
    }
    .user-avatar:hover { opacity: 0.75; }
    .avatar-upload-input { display: none; }

    .import-progress {
      display: none;
      width: 100%;
      font-size: 12px;
      color: var(--muted);
      padding: 4px 0;
    }
    .import-progress.visible { display: block; }

    .folder-modal-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.4);
      z-index: 9001;
      align-items: center;
      justify-content: center;
      padding: 24px;
    }
    .folder-modal-overlay.active { display: flex; }

    .folder-modal {
      width: 100%;
      max-width: 500px;
      background: var(--card);
      border-radius: 10px;
      border: 1px solid var(--border);
      box-shadow: 0 24px 48px var(--shadow);
      overflow: hidden;
      max-height: 80vh;
      display: flex;
      flex-direction: column;
    }

    .folder-modal-header {
      padding: 16px 18px;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-shrink: 0;
    }

    .folder-modal-title {
      font-size: 14px;
      font-weight: 800;
      color: var(--accent);
    }

    .folder-modal-body {
      padding: 12px 18px;
      overflow-y: auto;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .folder-file-row {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 10px;
      border-radius: 8px;
      border: 1px solid var(--border);
      background: var(--input-bg);
    }
    .folder-file-row.skipped { opacity: 0.35; }

    .folder-file-name {
      flex: 1;
      font-size: 12px;
      color: var(--accent);
      font-weight: 600;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .folder-file-select {
      padding: 4px 8px;
      border-radius: 6px;
      border: 1px solid var(--border);
      background: var(--card);
      color: var(--accent);
      font-size: 11px;
      cursor: pointer;
      flex-shrink: 0;
    }

    .folder-file-skip {
      font-size: 11px;
      color: var(--muted2);
      cursor: pointer;
      background: none;
      border: none;
      padding: 2px 6px;
      border-radius: 4px;
      flex-shrink: 0;
      transition: color 0.15s;
    }
    .folder-file-skip:hover { color: #e53935; }

    .folder-modal-footer {
      padding: 14px 18px;
      border-top: 1px solid var(--border);
      display: flex;
      gap: 8px;
      justify-content: space-between;
      align-items: center;
      flex-shrink: 0;
    }

    .folder-modal-count {
      font-size: 12px;
      color: var(--muted);
    }
    .collection-toolbar {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 32px;
      flex-wrap: wrap;
    }

    .search-input {
      flex: 1;
      min-width: 180px;
      padding: 8px 12px;
      border-radius: 8px;
      border: 1px solid var(--border);
      background: var(--input-bg);
      color: var(--accent);
      font-size: 13px;
      outline: none;
      transition: border-color 0.15s;
      -webkit-user-select: text;
      user-select: text;
    }
    .search-input:focus { border-color: var(--accent); }
    .search-input::placeholder { color: var(--muted2); }

    .import-folder-btn {
      padding: 8px 14px;
      border-radius: 8px;
      border: 1px solid var(--border);
      background: var(--card);
      cursor: pointer;
      font-weight: 700;
      font-size: 12px;
      color: var(--accent);
      transition: opacity 0.15s;
      white-space: nowrap;
      position: relative;
      overflow: hidden;
    }
    .import-folder-btn:hover { opacity: 0.7; }
    .import-folder-btn input[type="file"] {
      position: absolute;
      inset: 0;
      opacity: 0;
      cursor: pointer;
      width: 100%;
      height: 100%;
    }

    .user-avatar { cursor: pointer; transition: opacity 0.15s; }
    .user-avatar:hover { opacity: 0.75; }
    .avatar-upload-input { display: none; }

    .import-progress {
      display: none;
      width: 100%;
      font-size: 12px;
      color: var(--muted);
      padding: 4px 0;
      margin-bottom: 8px;
    }
    .import-progress.visible { display: block; }

    .cover-modal-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.4);
      z-index: 9002;
      align-items: center;
      justify-content: center;
      padding: 24px;
    }
    .cover-modal-overlay.active { display: flex; }

    .cover-modal {
      width: 100%;
      max-width: 520px;
      background: var(--card);
      border-radius: 10px;
      border: 1px solid var(--border);
      box-shadow: 0 24px 48px var(--shadow);
      overflow: hidden;
      max-height: 85vh;
      display: flex;
      flex-direction: column;
    }

    .cover-modal-header {
      padding: 16px 18px;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-shrink: 0;
    }

    .cover-modal-title {
      font-size: 14px;
      font-weight: 800;
      color: var(--accent);
    }

    .cover-modal-body {
      padding: 18px;
      display: flex;
      flex-direction: column;
      gap: 16px;
      overflow-y: auto;
      flex: 1;
    }

    .cover-rescan-row {
      display: flex;
      gap: 8px;
      align-items: flex-end;
    }

    .cover-rescan-row .modal-input {
      flex: 1;
    }

    .cover-rescan-btn {
      padding: 8px 14px;
      border-radius: 8px;
      border: none;
      background: var(--highlight-bg);
      color: var(--highlight-color);
      font-size: 12px;
      font-weight: 700;
      cursor: pointer;
      white-space: nowrap;
      flex-shrink: 0;
      transition: opacity 0.15s;
    }
    .cover-rescan-btn:hover { opacity: 0.8; }
    .cover-rescan-btn:disabled { opacity: 0.4; cursor: not-allowed; }

    .cover-upload-btn {
      width: 100%;
      padding: 10px;
      border-radius: 8px;
      border: 1px dashed var(--border);
      background: transparent;
      color: var(--muted);
      font-size: 12px;
      font-weight: 700;
      cursor: pointer;
      text-align: center;
      position: relative;
      overflow: hidden;
      transition: border-color 0.15s, color 0.15s;
    }
    .cover-upload-btn:hover { border-color: var(--accent); color: var(--accent); }
    .cover-upload-btn input[type="file"] {
      position: absolute;
      inset: 0;
      opacity: 0;
      cursor: pointer;
      width: 100%;
      height: 100%;
    }

    .cover-results-label {
      font-size: 11px;
      font-weight: 700;
      color: var(--muted2);
      text-transform: uppercase;
      letter-spacing: 0.06em;
    }

    .cover-results-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
      gap: 8px;
    }

    .cover-result-item {
      display: flex;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }

    .cover-result-img {
      width: 100%;
      aspect-ratio: 3 / 4;
      object-fit: cover;
      border-radius: 6px;
      border: 2px solid var(--border);
      transition: border-color 0.15s;
      display: block;
    }
    .cover-result-item:hover .cover-result-img { border-color: var(--accent); }
    .cover-result-img.selected { border-color: var(--highlight-bg); }

    .cover-result-label {
      font-size: 10px;
      color: var(--muted);
      text-align: center;
      line-height: 1.3;
      overflow: hidden;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
    }

    .cover-status {
      font-size: 12px;
      color: var(--muted);
      text-align: center;
    }

    .cover-modal-footer {
      padding: 14px 18px;
      border-top: 1px solid var(--border);
      display: flex;
      gap: 8px;
      justify-content: flex-end;
      flex-shrink: 0;
    }

    .game-cover-wrap {
      position: relative;
      overflow: hidden;
    }
    .game-cover-edit {
      position: absolute;
      inset: 0;
      background: rgba(0,0,0,0);
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      transition: opacity 0.15s, background 0.15s;
      cursor: pointer;
      border: none;
      width: 100%;
    }
    .game-cover-wrap:hover .game-cover-edit {
      opacity: 1;
      background: rgba(0,0,0,0.45);
    }
    .game-cover-edit-label {
      font-size: 11px;
      font-weight: 700;
      color: #ffffff;
      letter-spacing: 0.04em;
    }