/* ============================================================
   D4W.XYZ — Shared Components (buttons, inputs, modals, etc.)
   ============================================================ */

:root {
  --control-height: 26px;
}

/* Toolbar rows (piano roll, playlist, ...): every .btn and <select> in the
   row shares one height so mixed controls line up evenly, regardless of
   each element's own font size or default padding. */
.toolbar-row .btn,
.toolbar-row select {
  height: var(--control-height);
  line-height: calc(var(--control-height) - 2px);
  padding: 0 10px;
  box-sizing: border-box;
}

.toolbar-row .btn-icon {
  width: var(--control-height);
  padding: 0;
}

.toolbar-row select {
  padding: 0 6px;
}

/* Connected "pill" button group — square icon buttons sharing one outer
   rounded shape (2:1 width:height), only the group's outer corners rounded.
   Used for tool-mode switches and zoom in/out pairs. */
.btn-group-pill {
  display: flex;
  border-radius: calc(var(--control-height) / 2);
  overflow: hidden;
}

.btn-group-pill .btn {
  border-radius: 0;
  border-right-width: 0;
}

.btn-group-pill .btn:last-child {
  border-right-width: 1px;
}

/* Subtle two-tone shading for zoom pairs, distinguishing the two halves of
   the pill. A relative brightness filter (rather than a theme color) keeps
   the contrast visible no matter which theme is active. */
.btn-group-pill--zoom .btn:last-child {
  filter: brightness(0.92);
}

.btn {
  background: var(--button-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 5px 10px;
  cursor: pointer;
  transition: background 0.1s ease, border-color 0.1s ease;
}

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

.btn:active {
  background: var(--accent-glow);
}

.btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

input[type="number"],
input[type="text"],
select {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 4px 6px;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--border-accent);
}

input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: none;
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: none;
  cursor: pointer;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  min-width: 320px;
  max-width: 480px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.modal-large {
  max-width: 640px;
  width: 90vw;
}

.modal-tabs {
  display: flex;
  gap: 4px;
  padding: 8px 16px 0;
  border-bottom: 1px solid var(--border-color);
}

.modal-tab {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 12px;
  padding: 6px 12px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.modal-tab:hover {
  color: var(--text-primary);
}

.modal-tab.active {
  color: var(--text-primary);
  border-bottom-color: var(--border-accent);
}

.modal-tab-panel.hidden {
  display: none;
}

.help-shortcut-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 12px;
  font-size: 12px;
}

.help-shortcut-table td {
  padding: 3px 8px 3px 0;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

.help-shortcut-table td:first-child {
  white-space: nowrap;
  color: var(--text-primary);
  font-family: monospace;
  width: 1%;
}

.help-shortcut-table td:last-child {
  color: var(--text-secondary);
}

/* Preset Browser */
.preset-browser-search {
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 10px;
}

.preset-browser-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.preset-browser-section {
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.preset-browser-section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  background: var(--bg-tertiary);
  border: none;
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  text-align: left;
  padding: 8px 10px;
  cursor: pointer;
}

.preset-browser-section-header:hover {
  background: var(--button-hover);
}

.preset-browser-section-toggle {
  flex: 0 0 auto;
  width: 12px;
  color: var(--text-secondary);
}

.preset-browser-section-title {
  flex: 1 1 auto;
}

.preset-browser-section-count {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 400;
  color: var(--text-muted);
}

.preset-browser-section-body {
  padding: 4px;
}

.preset-browser-section-body.hidden {
  display: none;
}

.preset-browser-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 5px 8px;
  font-size: 12px;
  border-radius: 3px;
}

.preset-browser-item:hover {
  background: var(--button-hover);
}

.preset-browser-item-name {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preset-browser-add {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
}

.preset-browser-empty {
  padding: 8px;
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  margin: 0;
  font-size: 15px;
}

.modal-close {
  width: 24px;
  height: 24px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 16px;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
  max-height: 70vh;
  overflow-y: auto;
}

.about-changelog {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

.about-changelog h3 {
  margin: 12px 0 4px;
  font-size: 12px;
  color: var(--text-primary);
}

.about-changelog h3:first-child {
  margin-top: 0;
}

.about-changelog ul {
  margin: 0;
  padding-left: 20px;
}

.about-changelog li {
  margin-bottom: 2px;
}

/* Toasts */
#toast-container {
  position: fixed;
  right: 16px;
  bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 2000;
  pointer-events: none;
}

.toast {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 8px 14px;
  font-size: 12px;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Context menu (spec §12.3) */
.context-menu {
  position: fixed;
  min-width: 160px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 4px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
}

.context-menu-item {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 12px;
  text-align: left;
  padding: 6px 10px;
  cursor: pointer;
}

.context-menu-item:hover:not(:disabled) {
  background: var(--button-hover);
}

.context-menu-item:disabled {
  color: var(--text-muted);
  cursor: default;
}

.context-menu-separator {
  height: 1px;
  margin: 4px 2px;
  background: var(--border-color);
}

/* Color picker popover (spec §12.4) */
.color-picker-popover {
  position: fixed;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 8px;
  z-index: 3000;
}

.color-picker-swatches {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin-bottom: 8px;
}

.color-picker-swatch {
  width: 22px;
  height: 22px;
  border: 1px solid var(--border-color);
  cursor: pointer;
  padding: 0;
}

.color-picker-swatch.selected {
  outline: 2px solid var(--border-accent);
}

.color-picker-hex {
  width: 100%;
  box-sizing: border-box;
}


/* Knob (spec §12.1) */
.knob {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 56px;
  user-select: none;
}

.knob-svg {
  width: 36px;
  height: 36px;
  cursor: ns-resize;
}

.knob-track {
  fill: none;
  stroke: var(--bg-tertiary);
  stroke-width: 3;
  stroke-linecap: round;
}

.knob-fill {
  fill: none;
  stroke: var(--accent-primary);
  stroke-width: 3;
  stroke-linecap: round;
}

.knob-indicator {
  stroke: var(--text-primary);
  stroke-width: 2;
  stroke-linecap: round;
}

.knob-label {
  font-size: 10px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
}

.knob-value {
  font-size: 11px;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.knob-edit-input {
  width: 48px;
  font-size: 11px;
  text-align: center;
  padding: 1px 2px;
}

/* Placeholder content shown inside not-yet-built panels */
.panel-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  font-size: 13px;
  font-style: italic;
  text-align: center;
  padding: 16px;
}