:root {
  --bg: #212121;
  --surface: #171717;
  --surface-hover: #2a2a2a;
  --border: #424242;
  --text: #ececec;
  --text-dim: #9b9b9b;
  --accent: #7c9cff;
  --accent-dim: rgba(124, 156, 255, 0.15);
  --user-bubble: #2f2f2f;
  --green: #3fb950;
  --green-dim: #23883633;
  --red: #f85149;
  --yellow: #d29922;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* --- Login screen --- */
#login-screen {
  text-align: center;
  max-width: 400px;
  padding: 2rem;
  z-index: 1;
  position: relative;
  animation: loginFadeIn 0.8s ease-out;
}
@keyframes loginFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.login-mascot {
  width: 150px;
  height: auto;
  border-radius: 50%;
  margin-bottom: 1rem;
}
#login-screen h1 {
  font-size: 3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
}
#login-screen p {
  color: var(--text-dim);
  margin-bottom: 2rem;
  line-height: 1.6;
  font-size: 1.05rem;
}
#login-screen input {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  margin-bottom: 1rem;
}
#login-screen input:focus { border-color: var(--accent); }
#login-screen button {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 0.75rem;
}
#login-screen button:hover { opacity: 0.9; }
#login-screen button:disabled { opacity: 0.5; cursor: not-allowed; }

.divider {
  display: flex;
  align-items: center;
  margin: 1rem 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border);
}
.divider span { padding: 0 0.75rem; }

#google-login-btn {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
#google-login-btn:hover { border-color: var(--text-dim); }
#google-login-btn svg {
  width: 18px;
  height: 18px;
}

#login-error {
  color: var(--red);
  margin-top: 0.75rem;
  min-height: 1.5rem;
  font-size: 0.9rem;
}

/* --- Fade transitions --- */
#login-screen {
  transition: opacity 0.5s ease;
}
#login-screen.fade-out {
  opacity: 0;
}

/* --- App layout (sidebar + chat) --- */
#app-layout {
  display: none;
  width: 100%;
  height: 100vh;
}
#app-layout.active {
  display: flex;
}
#app-layout.fade-in {
  animation: appFadeIn 0.5s ease-out;
}
@keyframes appFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* --- Sidebar --- */
#sidebar {
  width: 260px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  height: 100vh;
}
#sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#sidebar-header .sidebar-title {
  font-weight: 600;
  color: var(--text);
  font-size: 1.1rem;
}
.sidebar-header-actions {
  display: flex;
  gap: 0.4rem;
}
#sidebar-photos-btn, #new-chat-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
}
#sidebar-photos-btn:hover, #new-chat-btn:hover { border-color: var(--text-dim); color: var(--text); }
#sidebar-sessions {
  flex: 1;
  overflow-y: auto;
  padding: 0.25rem 0;
}
.sidebar-date-group {
  padding: 0.5rem 1rem 0.25rem;
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.sidebar-session {
  position: relative;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  transition: background 0.15s;
  border-radius: 6px;
  margin: 1px 0.5rem;
  border: 1px solid transparent;
}
.sidebar-session:hover { background: var(--surface-hover); }
.ss-delete {
  position: absolute;
  top: 0.35rem;
  right: 0.35rem;
  width: 1.2rem;
  height: 1.2rem;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, border-color 0.15s, color 0.15s;
}
.sidebar-session:hover .ss-delete { opacity: 1; }
.ss-delete:hover { border-color: var(--red); color: var(--red); }
.sidebar-session.active {
  background: var(--accent-dim);
  border-color: var(--accent);
}
.sidebar-session .ss-summary {
  font-size: 0.85rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-session .ss-summary.empty {
  font-style: italic;
  color: var(--text-dim);
}
.sidebar-session .ss-meta {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
}
.sidebar-session.dimmed { opacity: 0.5; }
#sidebar-load-more {
  display: none;
  width: calc(100% - 2rem);
  margin: 0.5rem 1rem;
  padding: 0.4rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  flex-shrink: 0;
}
#sidebar-load-more:hover { border-color: var(--text-dim); color: var(--text); }
#sidebar-footer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}
#sidebar-footer .user-avatar {
  width: 28px;
  height: 28px;
}
.sidebar-empty {
  text-align: center;
  color: var(--text-dim);
  padding: 2rem 1rem;
  font-size: 0.85rem;
}

/* Hamburger button (mobile only) */
#hamburger-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0.25rem;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}
#hamburger-btn:hover { color: var(--text); }

/* Sidebar backdrop (mobile only) */
#sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 49;
}
#sidebar-backdrop.open { display: block; }

/* Session view banner */
#session-view-banner {
  display: none;
  padding: 0.5rem 1rem;
  background: var(--accent-dim);
  border-bottom: 1px solid var(--accent);
  color: var(--accent);
  font-size: 0.85rem;
  align-items: center;
  justify-content: space-between;
}
#session-view-banner.visible { display: flex; }
#session-view-banner button {
  background: none;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
}
#session-view-banner button:hover { background: var(--accent); color: #fff; }

/* --- Chat screen --- */
#chat-screen {
  display: flex;
  flex-direction: column;
  flex: 1;
  height: 100vh;
  min-width: 0;
  position: relative;
}
#chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
#chat-header .title {
  font-weight: 600;
  color: var(--text);
  font-size: 1.1rem;
}
#chat-header .user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
}
.header-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
}
.header-btn:hover { border-color: var(--text-dim); color: var(--text); }
#sign-out-btn:hover { border-color: var(--red); color: var(--red); }

#messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 768px;
  width: 100%;
  align-self: center;
}

/* --- Messages: ChatGPT/Claude-style --- */
.msg {
  line-height: 1.6;
  font-size: 0.95rem;
  word-wrap: break-word;
  animation: msgFadeIn 0.3s ease-out;
}
@keyframes msgFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
/* User messages: right-aligned bubble */
.msg.user {
  align-self: flex-end;
  max-width: 80%;
  padding: 0.75rem 1rem;
  border-radius: 18px 18px 4px 18px;
  background: var(--user-bubble);
}
/* Assistant messages: no bubble, full width, clean text */
.msg.luke {
  align-self: flex-start;
  max-width: 100%;
  padding: 0.25rem 0;
}
.msg.system {
  align-self: center;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 90%;
  padding: 0.5rem 1rem;
  border-radius: 12px;
}
.msg.error {
  align-self: center;
  color: var(--red);
  border: 1px solid var(--red);
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  border-radius: 12px;
}
.msg.searching {
  align-self: center;
  color: var(--text-dim);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  font-style: italic;
  padding: 0.5rem 1rem;
  border-radius: 12px;
}

/* Markdown inside messages */
.msg p { margin-bottom: 0.5rem; }
.msg p:last-child { margin-bottom: 0; }
.msg code {
  background: rgba(255,255,255,0.08);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}
.msg pre {
  background: var(--surface);
  padding: 0.75rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 0.5rem 0;
  border: 1px solid var(--border);
}
.msg pre code { background: none; padding: 0; }
.msg ul, .msg ol { margin-left: 1.25rem; margin-bottom: 0.5rem; }
.msg blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 0.75rem;
  color: var(--text-dim);
  margin: 0.5rem 0;
}
.msg a { color: var(--accent); }

/* Typing indicator */
.typing-dots::after {
  content: '';
  animation: dots 1.5s infinite;
  color: var(--accent);
}
@keyframes dots {
  0%, 20% { content: ''; }
  40% { content: '.'; }
  60% { content: '..'; }
  80%, 100% { content: '...'; }
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.2);
}

/* --- Input area (ChatGPT-style unified container) --- */
#input-area {
  display: flex;
  padding: 0.75rem 1rem;
  justify-content: center;
  max-width: 768px;
  width: 100%;
  align-self: center;
}
#input-container {
  display: flex;
  align-items: flex-end;
  gap: 0.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 0.5rem 0.5rem 0.5rem 0.75rem;
  width: 100%;
  transition: border-color 0.2s;
}
#input-container:focus-within {
  border-color: var(--text-dim);
}
#msg-input {
  flex: 1;
  padding: 0.5rem 0.25rem;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  resize: none;
  min-height: 24px;
  max-height: 120px;
  font-family: inherit;
  line-height: 1.5;
}
#msg-input::placeholder {
  color: var(--text-dim);
}
#send-btn {
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity 0.15s;
}
#send-btn:hover { opacity: 0.85; }
#send-btn:disabled { opacity: 0.3; cursor: not-allowed; }
#send-btn svg {
  width: 18px;
  height: 18px;
}

/* Image upload */
#image-btn {
  padding: 0.5rem;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  flex-shrink: 0;
}
#image-btn:hover { color: var(--text); }
#image-btn.has-images { color: var(--green); }

/* Voice input */
#mic-btn {
  padding: 0.5rem;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  flex-shrink: 0;
}
#mic-btn:hover { color: var(--text); }
#mic-btn.recording {
  color: var(--red);
  animation: mic-pulse 1.5s ease-in-out infinite;
}
@keyframes mic-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(248, 81, 73, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(248, 81, 73, 0); }
}

#image-preview {
  display: none;
  padding: 0.5rem 1rem;
  gap: 0.5rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
  flex-wrap: wrap;
  max-width: 768px;
  width: 100%;
  align-self: center;
}
#image-preview.visible { display: flex; }

.preview-item {
  position: relative;
  width: 60px;
  height: 60px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.preview-remove {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  background: var(--red);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.preview-remove:hover { opacity: 0.8; }

.image-error {
  color: var(--red);
  font-size: 0.8rem;
  padding: 0.25rem 0.5rem;
  background: rgba(248, 81, 73, 0.1);
  border-radius: 4px;
}

/* User message images */
.msg-images {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
.msg-images img {
  max-width: 200px;
  max-height: 150px;
  border-radius: 6px;
  cursor: pointer;
}
.msg-images img:hover { opacity: 0.9; }

/* Citations */
.citations {
  font-size: 0.85rem;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
}
.citations a { color: var(--accent); text-decoration: none; }
.citations a:hover { text-decoration: underline; }

/* Inline Photo Gallery (in chat messages) */
.inline-photo-gallery {
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}
.inline-photo-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}
.inline-photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 6px;
}
.inline-photo {
  aspect-ratio: 1;
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: opacity 0.15s;
}
.inline-photo:hover { opacity: 0.85; }
.inline-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* On This Day photo memories card */
.photo-memories-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  margin-bottom: 0.5rem;
  position: relative;
}
.photo-memories-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}
.photo-memories-title {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}
.photo-memories-close {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0 0.25rem;
  line-height: 1;
}
.photo-memories-close:hover { color: var(--text); }
.photo-memories-grid {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.photo-memory-item {
  flex: 0 0 auto;
  text-align: center;
  cursor: pointer;
}
.photo-memory-item img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}
.photo-memory-item img:hover { opacity: 0.85; }
.photo-memory-meta {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 4px;
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* On This Day year/moment grouping */
.photo-memories-year {
  margin-bottom: 0.75rem;
}
.photo-memories-year:last-child {
  margin-bottom: 0;
}
.photo-memories-year-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.photo-memories-moment-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}
.inline-photo-month-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
  margin-bottom: 0.25rem;
}

/* Settings Modal */
#settings-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.7);
  justify-content: center;
  align-items: center;
  z-index: 100;
}
.modal-content {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}
.modal-content h2 {
  margin-bottom: 1rem;
  color: var(--text);
}
.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.setting-row:last-child { border-bottom: none; }
.setting-label { color: var(--text); }
.setting-value { color: var(--text-dim); font-size: 0.9rem; }
.setting-btn {
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.85rem;
}
.setting-btn:hover { border-color: var(--text-dim); color: var(--text); }
.setting-btn.connected { border-color: var(--green); color: var(--green); }
.setting-btn.disconnect { border-color: var(--red); color: var(--red); }
.modal-close {
  margin-top: 1rem;
  width: 100%;
  padding: 0.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
}
.modal-close:hover { border-color: var(--text-dim); }

/* --- People panel --- */
#people-panel {
  display: none;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 360px;
  background: var(--bg);
  border-left: 1px solid var(--border);
  z-index: 50;
  flex-direction: column;
  overflow: hidden;
}
#people-panel.open { display: flex; }
#people-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  color: var(--text);
  flex-shrink: 0;
}
#people-header button {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.3rem;
  cursor: pointer;
}
#people-header button:hover { color: var(--text); }
#people-actions {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}
.people-action-btn {
  flex: 1;
  padding: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  text-align: center;
}
.people-action-btn:hover { border-color: var(--text-dim); color: var(--text); }
#people-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 0;
}
.person-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.person-card:hover { background: var(--surface); }
.person-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-dim);
  flex-shrink: 0;
  overflow: hidden;
}
.person-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.person-info { flex: 1; min-width: 0; }
.person-name {
  font-size: 0.9rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.person-name.unnamed { font-style: italic; color: var(--text-dim); }
.person-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
}
.person-name-input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  width: 120px;
}
.person-name-input:focus { border-color: var(--accent); outline: none; }
.people-empty {
  text-align: center;
  color: var(--text-dim);
  padding: 2rem 1rem;
  font-size: 0.9rem;
}

/* Scan progress */
#scan-progress {
  display: none;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#scan-progress.visible { display: block; }
#scan-progress-text {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}
#scan-progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
#scan-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s;
}

/* Person detail / photo gallery */
#person-detail {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
#person-detail-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#person-detail-header button {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
}
#person-detail-header button:hover { border-color: var(--text-dim); color: var(--text); }
#person-detail-name {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 600;
}
#person-gallery {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.5rem;
  align-content: start;
}
.gallery-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid var(--border);
}
.gallery-img:hover { opacity: 0.9; border-color: var(--text-dim); }

/* Scan folder dialog */
#scan-dialog {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  justify-content: center;
  align-items: center;
  z-index: 100;
}
#scan-dialog .modal-content input {
  width: 100%;
  padding: 0.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.9rem;
  margin: 0.75rem 0;
}
#scan-dialog .modal-content input:focus { border-color: var(--accent); outline: none; }

/* Batch upload drop zone */
#batch-upload-zone {
  display: none;
  padding: 1.5rem 1rem;
  border: 2px dashed var(--border);
  border-radius: 8px;
  margin: 0.5rem 1rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
#batch-upload-zone:hover { border-color: var(--text-dim); color: var(--text); }
#batch-upload-zone.dragover { border-color: var(--green); color: var(--green); }

@media (max-width: 600px) {
  .msg.user { max-width: 88%; }
  #sidebar {
    position: fixed;
    left: -280px;
    top: 0;
    bottom: 0;
    z-index: 50;
    width: 280px;
    transition: left 0.25s ease;
  }
  #sidebar.open { left: 0; }
  #hamburger-btn { display: flex; }
  #people-panel { width: 100%; }
  #input-container {
    border-radius: 20px;
  }
}

/* === Photos Page === */
#photos-page {
  display: none;
  position: absolute;
  inset: 0;
  z-index: 60;
  background: var(--bg);
  flex-direction: column;
  overflow: hidden;
}
#photos-page.open { display: flex; }

#photos-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}
#photos-header .photos-back-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0.25rem;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#photos-header .photos-back-btn:hover { color: var(--text); }
#photos-header .photos-title {
  flex: 1;
  font-weight: 600;
  color: var(--text);
  font-size: 1.1rem;
}
.photos-action-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.photos-action-btn:hover { border-color: var(--text-dim); color: var(--text); }
.photos-scan-btn { }

/* Photos upload progress */
#photos-upload-progress {
  display: none;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--surface);
}
#photos-upload-progress.visible { display: block; }
#photos-progress-text {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}
#photos-progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
#photos-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s;
}

/* Mobile upload section */
#mobile-upload-section {
  display: none;
  padding: 1rem;
  flex-direction: column;
  gap: 0.75rem;
  overflow-y: auto;
  flex: 1;
}
#mobile-upload-section.open { display: flex; }
.upload-area {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 2rem 1rem;
  text-align: center;
  color: var(--text-dim);
  cursor: pointer;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: border-color 0.2s, color 0.2s;
}
.upload-area:hover { border-color: var(--text-dim); color: var(--text); }
.upload-area-icon { font-size: 2rem; }
.upload-area-text { font-size: 0.9rem; }
#upload-preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}
.upload-preview-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.upload-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.upload-preview-remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 24px;
  height: 24px;
  background: rgba(248, 81, 73, 0.9);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
#upload-submit-btn {
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
}
#upload-submit-btn:hover { opacity: 0.9; }
#upload-submit-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Photos home */
#photos-home {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}
.photos-section-title {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  padding-bottom: 0.25rem;
}

/* Top people grid */
#top-people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.top-person-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 12px;
  transition: background 0.15s;
  min-height: 44px;
}
.top-person-card:hover { background: var(--surface); }
.top-person-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-dim);
  overflow: hidden;
  flex-shrink: 0;
}
.top-person-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.top-person-name {
  font-size: 0.8rem;
  color: var(--text);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.top-person-name.unnamed { color: var(--text-dim); font-style: italic; }
.top-person-count {
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* All people list */
#all-people-list { margin-bottom: 1rem; }
#recent-photos-section { margin-top: 1rem; }
.people-list-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.5rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
  min-height: 44px;
}
.people-list-card:hover { background: var(--surface); }
.people-list-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-dim);
  flex-shrink: 0;
  overflow: hidden;
}
.people-list-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.people-list-info { flex: 1; min-width: 0; }
.people-list-name {
  font-size: 0.9rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.people-list-name.unnamed { font-style: italic; color: var(--text-dim); }
.people-list-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
}
.people-list-name-input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  font-size: 0.85rem;
  width: 140px;
  min-height: 32px;
}
.people-list-name-input:focus { border-color: var(--accent); outline: none; }

/* Person detail (photos page) */
#photos-person-detail {
  display: none;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}
#photos-person-detail.open { display: flex; }
.photos-person-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.photos-person-header-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-dim);
  overflow: hidden;
  flex-shrink: 0;
}
.photos-person-header-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.photos-person-header-info { flex: 1; }
.photos-person-header-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}
.photos-person-header-count {
  font-size: 0.8rem;
  color: var(--text-dim);
}
.photos-rename-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.photos-rename-btn:hover { border-color: var(--text-dim); color: var(--text); }

#photos-name-input-area {
  display: none;
  padding: 0.5rem 1rem;
  gap: 0.5rem;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
#photos-name-input-area.open { display: flex; }
#photos-name-input {
  flex: 1;
  padding: 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.9rem;
  min-height: 40px;
}
#photos-name-input:focus { border-color: var(--accent); outline: none; }
.photos-name-save, .photos-name-cancel {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  min-height: 40px;
}
.photos-name-save:hover { border-color: var(--green); color: var(--green); }
.photos-name-cancel:hover { border-color: var(--red); color: var(--red); }

/* Timeline */
#photos-timeline {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 1rem;
}
.timeline-month-label {
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 0.5rem 0;
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 600;
  z-index: 5;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
}
.timeline-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  margin-bottom: 1rem;
}
.timeline-photo {
  aspect-ratio: 1;
  object-fit: cover;
  width: 100%;
  cursor: pointer;
  border-radius: 2px;
}
.timeline-photo:hover { opacity: 0.85; }

/* Photo Lightbox */
#photo-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 200;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
#photo-lightbox.open { display: flex; }
.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 201;
}
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.1);
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 1rem 0.75rem;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  z-index: 201;
}
.lightbox-nav:hover { background: rgba(255,255,255,0.2); }
.lightbox-prev { left: 0.5rem; }
.lightbox-next { right: 0.5rem; }
#lightbox-img {
  max-width: 95vw;
  max-height: 85vh;
  object-fit: contain;
  user-select: none;
  -webkit-user-select: none;
}
#lightbox-caption {
  color: rgba(255,255,255,0.7);
  font-size: 0.8rem;
  margin-top: 0.75rem;
  text-align: center;
}
#lightbox-counter {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.6);
  font-size: 0.8rem;
  background: rgba(0,0,0,0.5);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
}

.photos-empty {
  text-align: center;
  color: var(--text-dim);
  padding: 2rem 1rem;
  font-size: 0.9rem;
}

/* Welcome suggestion chips */
#welcome-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.25rem 0;
  align-self: center;
  justify-content: center;
  max-width: 90%;
  animation: chipsIn 0.4s ease-out;
}
@keyframes chipsIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.welcome-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  white-space: nowrap;
  min-height: 40px;
}
.welcome-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}
.welcome-chip-icon {
  font-size: 1rem;
  line-height: 1;
}

/* Responsive: tablets */
@media (min-width: 768px) {
  .timeline-photo-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  #top-people-grid {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  }
}
/* Responsive: desktop */
@media (min-width: 1024px) {
  .timeline-photo-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}
/* Responsive: mobile */
@media (max-width: 767px) {
  #top-people-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .lightbox-nav { display: none; }
  .photos-scan-btn { display: none; }
  #upload-preview-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}