/* ==========================================================================
   Synaptic — Component Library
   Phase 18B — Buttons, inputs, dropdowns, modals
   ========================================================================== */

/* All v2 components are scoped to prevent conflict with legacy styles */

/* ----- Buttons ----- */
.synaptic-v2 .sv2-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.synaptic-v2 .sv2-btn:active {
  transform: scale(0.98);
}

.synaptic-v2 .sv2-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary */
.synaptic-v2 .sv2-btn-primary {
  background: var(--color-accent);
  color: white;
}
.synaptic-v2 .sv2-btn-primary:hover {
  background: var(--color-accent-hover);
}

/* Secondary */
.synaptic-v2 .sv2-btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}
.synaptic-v2 .sv2-btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
}

/* Ghost */
.synaptic-v2 .sv2-btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.synaptic-v2 .sv2-btn-ghost:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

/* Size variants */
.synaptic-v2 .sv2-btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}

.synaptic-v2 .sv2-btn-lg {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-md);
}

.synaptic-v2 .sv2-btn-block {
  width: 100%;
}

/* ----- Icon Button (square) ----- */
.synaptic-v2 .sv2-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.synaptic-v2 .sv2-icon-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.synaptic-v2 .sv2-icon-btn:active {
  transform: scale(0.95);
}

.synaptic-v2 .sv2-icon-btn-sm {
  width: 28px;
  height: 28px;
}

.synaptic-v2 .sv2-icon-btn-lg {
  width: 36px;
  height: 36px;
}

/* Lucide icons inside buttons inherit size automatically */
.synaptic-v2 .sv2-icon-btn svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.75;
}

/* ----- Inputs ----- */
.synaptic-v2 .sv2-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.synaptic-v2 .sv2-input::placeholder {
  color: var(--color-text-tertiary);
}

.synaptic-v2 .sv2-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

/* ----- Chips / Tags ----- */
.synaptic-v2 .sv2-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.synaptic-v2 .sv2-chip:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
  color: var(--color-text-primary);
}

/* ----- Dropdown Menu ----- */
.synaptic-v2 .sv2-dropdown {
  position: absolute;
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  z-index: var(--z-dropdown);
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.synaptic-v2 .sv2-dropdown.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.synaptic-v2 .sv2-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  cursor: pointer;
  text-align: left;
  transition: background var(--transition-fast);
}

.synaptic-v2 .sv2-dropdown-item:hover {
  background: var(--color-surface-hover);
}

.synaptic-v2 .sv2-dropdown-item svg {
  width: 16px;
  height: 16px;
  color: var(--color-text-tertiary);
  flex-shrink: 0;
}

.synaptic-v2 .sv2-dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-2) 0;
}

/* Danger variant for destructive actions (e.g., Logout) */
.synaptic-v2 .sv2-dropdown-item-danger {
  color: var(--color-error);
}
.synaptic-v2 .sv2-dropdown-item-danger svg {
  color: var(--color-error);
}

/* ----- Modal ----- */
.synaptic-v2 .sv2-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.synaptic-v2 .sv2-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.synaptic-v2 .sv2-modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 90%;
  max-width: 480px;
  max-height: 85vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.96);
  transition: transform var(--transition-base);
}

.synaptic-v2 .sv2-modal-backdrop.open .sv2-modal {
  transform: scale(1);
}

.synaptic-v2 .sv2-modal-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.synaptic-v2 .sv2-modal-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.synaptic-v2 .sv2-modal-body {
  padding: var(--space-5) var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.synaptic-v2 .sv2-modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}

/* ----- Avatar ----- */
.synaptic-v2 .sv2-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: white;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  flex-shrink: 0;
  user-select: none;
}

.synaptic-v2 .sv2-avatar-sm {
  width: 24px;
  height: 24px;
  font-size: var(--text-xs);
}

.synaptic-v2 .sv2-avatar-lg {
  width: 40px;
  height: 40px;
  font-size: var(--text-base);
}