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

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --surface-hover: #fafafa;
  --border: #e5e5ea;
  --border-light: #f0f0f3;
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --text-3: #aeaeb2;
  --primary: #0071e3;
  --primary-hover: #0077ed;
  --primary-bg: #e8f2ff;
  --danger: #ff3b30;
  --success: #34c759;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 52px;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.logo svg { color: var(--primary); }

.topbar-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 50%;
  color: var(--text-2);
  cursor: pointer;
  transition: var(--transition);
}

.topbar-btn:hover { background: var(--border-light); color: var(--text); }

/* Overlay & Modal */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.15s ease;
}

.overlay.hidden { display: none; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
  background: var(--surface);
  border-radius: 16px;
  width: 90%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 0;
}

.modal-header h2 { font-size: 1.15rem; font-weight: 600; }

.close-btn {
  width: 30px; height: 30px;
  border: none; background: var(--border-light);
  border-radius: 50%; font-size: 1.1rem;
  color: var(--text-2); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}

.close-btn:hover { background: var(--border); }

.modal-body { padding: 20px 24px 24px; }

.form-section { margin-bottom: 24px; }
.form-section h3 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  margin-bottom: 14px;
}

.form-group { margin-bottom: 14px; }

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 5px;
  color: var(--text);
}

.form-group small, .section-hint {
  display: block;
  font-size: 0.72rem;
  color: var(--text-3);
  margin-top: 4px;
  line-height: 1.4;
}

input[type="url"], input[type="text"], input[type="password"], select, textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  transition: var(--transition);
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,113,227,0.12);
}

textarea { resize: vertical; }

.input-row { display: flex; gap: 6px; }
.input-row input { flex: 1; }

.icon-btn-sm {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.icon-btn-sm:hover { background: var(--border-light); }

/* Switch */
.switch-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  font-size: 0.88rem;
  cursor: pointer;
}

.switch-label input { display: none; }

.switch {
  position: relative;
  width: 44px; height: 24px;
  background: var(--border);
  border-radius: 12px;
  transition: var(--transition);
  flex-shrink: 0;
}

.switch::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 20px; height: 20px;
  background: white;
  border-radius: 50%;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.switch-label input:checked + .switch { background: var(--primary); }
.switch-label input:checked + .switch::after { left: 22px; }

/* Buttons */
.btn {
  padding: 9px 20px;
  border: none;
  border-radius: 980px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover { background: var(--primary-bg); }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  padding: 8px 14px;
}

.btn-ghost:hover { background: var(--border-light); color: var(--text); }

.modal-footer {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding-top: 8px;
}

/* Toast */
.toast {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  line-height: 1.4;
}

.toast.hidden { display: none; }
.toast.success { background: #f0fdf4; color: #15803d; }
.toast.error { background: #fef2f2; color: #b91c1c; }

/* Main */
.main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}

.workspace {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Input Card */
.input-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.input-card:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,113,227,0.08);
}

.input-card textarea {
  border: none;
  padding: 4px 2px;
  font-size: 0.95rem;
  min-height: 60px;
}

.input-card textarea:focus { box-shadow: none; }

.input-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--border-light);
}

.toolbar-left { display: flex; align-items: center; gap: 8px; }
.toolbar-right { display: flex; align-items: center; gap: 12px; }

.hint { font-size: 0.72rem; color: var(--text-3); }

.tool-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  cursor: pointer;
  transition: var(--transition);
}

.tool-btn:hover { background: var(--border-light); color: var(--primary); }

.ref-preview { position: relative; display: inline-flex; }
.ref-preview.hidden { display: none; }
.ref-preview img {
  height: 34px; width: 34px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.ref-remove {
  position: absolute; top: -5px; right: -5px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--danger); color: white;
  border: none; font-size: 0.6rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  line-height: 1;
}

.btn-send {
  padding: 8px 22px;
  border-radius: 980px;
  font-size: 0.88rem;
}

.btn-loading.hidden { display: none; }

.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Options Bar */
.options-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.opt { display: flex; flex-direction: column; gap: 5px; }

.opt > label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-3);
}

.opt select {
  width: auto;
  min-width: 90px;
  padding: 5px 8px;
  font-size: 0.8rem;
  border-radius: 6px;
}

/* Segmented Control */
.seg {
  display: inline-flex;
  background: var(--border-light);
  border-radius: 6px;
  padding: 2px;
}

.seg button {
  padding: 4px 12px;
  border: none;
  background: transparent;
  font-size: 0.8rem;
  font-family: inherit;
  color: var(--text-2);
  cursor: pointer;
  border-radius: 5px;
  transition: var(--transition);
}

.seg button.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.seg button:not(.active):hover { color: var(--text); }

/* Override Panel */
.override-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.override-panel summary {
  padding: 10px 16px;
  font-size: 0.82rem;
  color: var(--text-2);
  cursor: pointer;
  user-select: none;
}

.override-panel summary:hover { color: var(--text); }

.override-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  padding: 0 16px 14px;
}

.override-grid .form-group { margin-bottom: 0; }
.override-grid label { font-size: 0.75rem; }
.override-grid input { font-size: 0.82rem; padding: 7px 10px; }

/* Gallery */
.gallery {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.gallery-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  animation: cardIn 0.3s ease;
  transition: var(--transition);
}

.gallery-card:hover { box-shadow: var(--shadow); transform: translateY(-1px); }

@keyframes cardIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.gallery-card .img-wrap {
  position: relative;
  cursor: pointer;
  overflow: hidden;
}

.gallery-card img {
  width: 100%;
  display: block;
  transition: transform 0.3s ease;
}

.gallery-card:hover img { transform: scale(1.02); }

.gallery-card .card-bar {
  padding: 8px 12px;
  display: flex;
  justify-content: flex-end;
}

.card-bar .btn { padding: 5px 14px; font-size: 0.78rem; border-radius: 6px; }

/* Error */
.error-bar {
  margin-top: 14px;
  padding: 12px 16px;
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fecaca;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  word-break: break-word;
}

.error-bar.hidden { display: none; }

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(0,0,0,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.lightbox.hidden { display: none; }

.lightbox img {
  max-width: 94vw;
  max-height: 94vh;
  border-radius: 8px;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 16px; right: 20px;
  width: 36px; height: 36px;
  border: none;
  background: rgba(255,255,255,0.15);
  color: white;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}

.lightbox-close:hover { background: rgba(255,255,255,0.3); }

/* Checkerboard */
.checkerboard {
  background-image:
    linear-gradient(45deg, #e5e5e5 25%, transparent 25%),
    linear-gradient(-45deg, #e5e5e5 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e5e5e5 75%),
    linear-gradient(-45deg, transparent 75%, #e5e5e5 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

/* Account Switcher */
.account-switcher { position: relative; }

.switcher-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 980px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  max-width: 200px;
}

.switcher-btn:hover { border-color: var(--primary); background: var(--primary-bg); }

.switcher-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}

.switcher-dot.inactive { background: var(--text-3); }
.switcher-dot.expired { background: var(--danger); }

.switcher-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.switcher-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 220px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 150;
  animation: fadeIn 0.12s ease;
  overflow: hidden;
}

.switcher-dropdown.hidden { display: none; }

.dropdown-list { max-height: 240px; overflow-y: auto; }

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  border: none;
  background: transparent;
  font-size: 0.82rem;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
}

.dropdown-item:hover { background: var(--border-light); }
.dropdown-item.active { background: var(--primary-bg); }

.dropdown-item .item-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-3);
  flex-shrink: 0;
}

.dropdown-item.active .item-dot { background: var(--primary); }

.dropdown-item .item-info {
  flex: 1;
  overflow: hidden;
}

.dropdown-item .item-name {
  display: block;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dropdown-item .item-sub {
  display: block;
  font-size: 0.72rem;
  color: var(--text-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dropdown-item .item-badge {
  font-size: 0.65rem;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--border-light);
  color: var(--text-3);
  flex-shrink: 0;
}

.dropdown-item .item-badge.oauth { background: #f0fdf4; color: #15803d; }

.dropdown-divider {
  height: 1px;
  background: var(--border-light);
}

.dropdown-manage {
  color: var(--text-2);
  font-size: 0.8rem;
}

.dropdown-manage svg { color: var(--text-3); }

/* Account Management Modal */
.modal-lg { max-width: 540px; }

.account-actions {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.btn-oauth {
  background: #1a1a1a;
  color: white;
  border: none;
}

.btn-oauth:hover { background: #333; }

.oauth-status {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--primary-bg);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--primary);
  margin-bottom: 16px;
}

.oauth-status.hidden { display: none; }

.oauth-status .spinner {
  border-color: rgba(0,113,227,0.2);
  border-top-color: var(--primary);
}

.oauth-manual {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  margin-bottom: 16px;
}

.oauth-manual.hidden { display: none; }

.oauth-manual-title {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.oauth-manual-desc {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--text-2);
  margin-bottom: 10px;
}

.oauth-manual-step2 {
  margin-top: 14px;
}

.oauth-manual textarea {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
}

.oauth-manual-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

/* Account List */
.account-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.account-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
}

.account-card:hover { border-color: var(--primary); background: var(--surface-hover); }
.account-card.active { border-color: var(--primary); background: var(--primary-bg); }

.account-radio {
  width: 16px; height: 16px;
  border: 2px solid var(--border);
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
  transition: var(--transition);
}

.account-card.active .account-radio {
  border-color: var(--primary);
}

.account-card.active .account-radio::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

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

.account-name {
  font-size: 0.88rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.account-name .badge {
  font-size: 0.65rem;
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 400;
}

.badge-manual { background: var(--border-light); color: var(--text-3); }
.badge-oauth { background: #f0fdf4; color: #15803d; }
.badge-expired { background: #fef2f2; color: #b91c1c; }

.account-detail {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.account-actions-bar {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.account-actions-bar button {
  width: 30px; height: 30px;
  border: none;
  background: transparent;
  border-radius: 6px;
  color: var(--text-3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.account-actions-bar button:hover { background: var(--border-light); color: var(--text); }
.account-actions-bar button.btn-delete:hover { background: #fef2f2; color: var(--danger); }

.account-empty {
  text-align: center;
  padding: 24px;
  color: var(--text-3);
  font-size: 0.85rem;
}

/* Global Settings */
.global-settings {
  border-top: 1px solid var(--border-light);
  padding-top: 20px;
}

.global-settings h3 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 600px) {
  .topbar { padding: 0 14px; }
  .main { padding: 16px 10px 60px; }
  .override-grid { grid-template-columns: 1fr; }
  .options-bar { gap: 8px; padding: 10px 12px; }
  .gallery { grid-template-columns: 1fr; }
  .switcher-btn { max-width: 140px; }
  .account-actions { flex-direction: column; }
}