/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  background: var(--bg-elevated);
  color: var(--text-primary);
  transition: background var(--transition-fast), border-color var(--transition-fast), transform 80ms ease;
}
.btn:hover { background: var(--bg-surface-hover); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
  border-color: var(--accent-active);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger {
  background: var(--danger);
  color: var(--text-inverse);
  border-color: var(--danger-active);
}
.btn-danger:hover { background: var(--danger-hover); }
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-surface-hover); }
.btn-sm { padding: 0.3rem 0.55rem; font-size: 0.78rem; }
.btn-lg { padding: 0.65rem 1.1rem; font-size: 0.95rem; }

/* Icon buttons */
.icon-btn {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  line-height: 1;
  padding: 0;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.icon-btn:hover { background: var(--bg-surface-hover); color: var(--text-primary); }
.icon-btn.active { color: var(--accent); background: var(--accent-soft); }

/* Forms */
input, textarea, select {
  font: inherit;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.65rem;
  width: 100%;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin: 0.35rem 0 0.2rem;
  color: var(--text-secondary);
}

.input-sm {
  width: auto;
  min-width: 5rem;
  max-width: 8rem;
  padding: 0.35rem 0.5rem;
  font-size: 0.78rem;
}

/* Error message */
.error-message {
  color: var(--danger);
  font-size: 0.85rem;
  min-height: 1.25rem;
  margin: 0.35rem 0 0;
}

/* Search bar */
.search-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.25rem 0.6rem;
  max-width: min(100%, 72rem);
  width: 100%;
}
.search-overlay {
  position: fixed;
  inset: 1rem 1rem auto 1rem;
  z-index: 90;
  display: flex;
  justify-content: center;
  pointer-events: none;
}
.search-overlay.hidden {
  display: none;
}
.search-overlay-bar {
  align-items: flex-start;
  flex-wrap: wrap;
  max-width: min(72rem, calc(100vw - 2rem));
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
}
.search-bar input {
  background: transparent;
  border: none;
  padding: 0.35rem 0.2rem;
  flex: 1 1 18rem;
  min-width: 8rem;
}
.search-bar input:focus { box-shadow: none; }
.tag-filter-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.3rem;
  flex: 1 1 18rem;
  min-width: 0;
  max-width: none;
}
.tag-filter-chip {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  max-width: 9rem;
  min-height: 2rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}
.tag-filter-chip:hover,
.tag-filter-chip:focus-visible {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  outline: none;
}
.tag-filter-chip.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text-primary);
}
.tag-filter-chip span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
/* Search syntax help tooltip */
.search-help {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.6rem 0.75rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  z-index: 45;
  max-width: 22rem;
  line-height: 1.5;
}
.search-help-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
  font-size: 0.82rem;
}
.search-help-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}
.search-help-row code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.35rem;
  color: var(--text-primary);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.65rem 0.9rem;
  z-index: 110;
  font-size: 0.85rem;
  transform: translateY(120%);
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.info { border-left: 4px solid var(--accent); }
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }

/* Share rows */
.share-row { cursor: pointer; outline: none; }
.share-row.selected { background: var(--accent-soft); border-left: 3px solid var(--accent); padding-left: calc(0.25rem - 3px); }
.share-row:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.shares-hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 0.5rem 0.25rem;
  text-align: center;
  border-top: 1px solid var(--border);
}
.shares-hint kbd {
  display: inline-block;
  padding: 0.08rem 0.3rem;
  font-family: inherit;
  font-size: 0.7rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}