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

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Top bar ── */
.top-bar {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  background: var(--bg);
  z-index: 100;
}

[data-theme="dark"] .top-bar {
  border-bottom-color: rgba(255, 255, 255, 0.04);
}

@media (min-width: 640px) {
  .top-bar { padding: 12px 24px; }
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 4px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  width: 20px;
  height: 20px;
  color: var(--fg);
  opacity: 0.8;
}

.logo-text {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--fg);
}

/* ── Main ── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding-top: 40px;
  padding-bottom: 16px;
}

@media (min-width: 640px) {
  .main-content { padding-top: 56px; }
}

/* ── Hero subtitle ── */
.hero p {
  color: var(--fg-faint);
  opacity: 0.7;
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 0 16px;
  flex-shrink: 0;
}

.hero h1 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--fg);
  text-wrap: balance;
}

@media (min-width: 640px) {
  .hero h1 { font-size: 36px; }
}

.hero p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--fg-faint);
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
  text-wrap: pretty;
}

@media (min-width: 640px) {
  .hero p { font-size: 16px; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font);
  white-space: nowrap;
}

.btn-primary {
  padding: 8px 16px;
  background: var(--primary);
  color: var(--primary-fg);
  border-radius: var(--radius-xl);
}

.btn-primary:hover { opacity: 0.9; }
.btn-primary:active { transform: scale(0.97); }

.btn-ghost {
  padding: 6px 12px;
  background: transparent;
  color: var(--fg-muted);
  border-radius: 9999px;
}

.btn-ghost:hover {
  background: var(--secondary);
  color: var(--fg);
}

.btn-outline {
  padding: 6px 16px;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border-light);
  border-radius: 9999px;
}

.btn-outline:hover {
  background: var(--bg-card-hover);
  border-color: var(--border);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 9999px;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--secondary);
}

/* ── User avatar button ── */
.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 9999px;
  background: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 500;
  color: var(--fg);
  cursor: pointer;
  border: none;
  transition: opacity var(--transition-fast);
}

.user-avatar:hover { opacity: 0.8; }

/* ── User dropdown ── */
.user-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  width: 192px;
  background: var(--bg);
  backdrop-filter: var(--blur-xl);
  -webkit-backdrop-filter: var(--blur-xl);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 4px;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

[data-theme="dark"] .user-dropdown {
  background: rgba(26, 26, 26, 0.95);
}

.user-dropdown.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.user-dropdown-info {
  padding: 8px 12px;
}

.user-dropdown-info .name {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
}

.user-dropdown-info .email {
  font-size: 12px;
  color: var(--fg-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-dropdown-divider {
  height: 1px;
  background: var(--border-light);
  margin: 4px 0;
}

.user-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  border: none;
  background: none;
  border-radius: calc(var(--radius-lg) - 4px);
  font-size: 14px;
  color: var(--fg);
  cursor: pointer;
  font-family: var(--font);
  transition: background var(--transition-fast);
}

.user-dropdown-item:hover {
  background: var(--secondary);
}

.user-dropdown-item.destructive {
  color: var(--destructive);
}

.user-dropdown-item svg {
  width: 14px;
  height: 14px;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 16px;
  border-top: 1px solid rgba(0, 0, 0, 0.03);
}

[data-theme="dark"] footer {
  border-top-color: rgba(255, 255, 255, 0.03);
}

footer p {
  font-size: 11px;
  color: var(--fg-faint);
  opacity: 0.4;
}

/* ── Toast ── */
.toast-container {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.toast {
  padding: 10px 20px;
  border-radius: var(--radius-lg);
  background: var(--fg);
  color: var(--bg);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease-out, toastOut 0.3s ease 3s forwards;
  max-width: 360px;
  text-align: center;
}

.toast.error {
  background: var(--destructive);
  color: #fff;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; transform: translateY(-8px); }
}

/* ── Overlay ── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.overlay.active {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}

/* ── Focus-visible ── */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--fg-faint); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg-muted); }

/* ── Tiles area (full remaining height) ── */
.tiles-area {
  width: 100%;
  flex: 1;
  min-height: 0;
}

/* ── Search results area ── */
.results-area {
  width: 100%;
  flex: 1;
  min-height: 0;
}

/* ── Custom animations ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseSoft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes float1 {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  25% { transform: translateY(-8px) rotate(0.5deg); }
  75% { transform: translateY(4px) rotate(-0.5deg); }
}

@keyframes float2 {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33% { transform: translateY(-6px) rotate(-0.5deg); }
  66% { transform: translateY(6px) rotate(0.5deg); }
}

@keyframes float3 {
  0%, 100% { transform: translateY(2px); }
  50% { transform: translateY(-10px); }
}

.animate-fade-in-up { animation: fadeInUp 0.4s ease-out forwards; }
.animate-slide-down { animation: slideDown 0.3s ease-out forwards; }
.animate-pulse-soft { animation: pulseSoft 2s ease-in-out infinite; }

/* ── Message badge ── */
.msg-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 9999px;
  background: var(--primary);
  color: var(--primary-fg);
  font-size: 9px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon { position: relative; }

/* ── Connection status ── */
.connection-status {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  padding: 8px 20px;
  border-radius: var(--radius-lg);
  background: var(--fg);
  color: var(--bg);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.connection-status.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.connection-status.offline {
  background: var(--destructive);
  color: #fff;
}