/**
 * Tool UI Design System
 * Modern/Minimal style for toolbar and comments
 */

/* ===== CSS Variables ===== */
:root {
  /* Colors */
  --tool-bg: #1a1a1a;
  --tool-bg-secondary: #2d2d2d;
  --tool-bg-hover: #3d3d3d;
  --tool-text: #ffffff;
  --tool-text-muted: #888888;
  --tool-accent: #0d9488;
  --tool-accent-hover: #0f766e;
  --tool-border: #404040;
  --tool-shadow: rgba(0, 0, 0, 0.3);

  /* Typography */
  --tool-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --tool-font-size: 13px;
  --tool-font-size-sm: 11px;

  /* Spacing */
  --tool-radius: 8px;
  --tool-radius-sm: 4px;
  --tool-spacing: 8px;
  --tool-spacing-lg: 16px;

  /* Z-Index Layers */
  --tool-z-toolbar: 9000;
  --tool-z-pins: 9100;
  --tool-z-popups: 9200;
  --tool-z-panel: 9300;
  --tool-z-overlay: 9400;
}

/* ===== Base Reset for Tool Elements ===== */
.tool-toolbar,
.tool-toolbar *,
.tool-panel,
.tool-panel *,
.tool-popup,
.tool-popup *,
.tool-pin {
  box-sizing: border-box;
  font-family: var(--tool-font);
  font-size: var(--tool-font-size);
  line-height: 1.4;
}

/* ===== Toolbar ===== */
.tool-toolbar {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--tool-z-toolbar);

  display: flex;
  align-items: center;
  gap: var(--tool-spacing);
  padding: var(--tool-spacing) var(--tool-spacing-lg);

  background: var(--tool-bg);
  border: 1px solid var(--tool-border);
  border-radius: var(--tool-radius);
  box-shadow: 0 4px 20px var(--tool-shadow);
}

/* ===== Toolbar Button ===== */
.tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;

  padding: 8px 12px;
  min-width: 36px;
  min-height: 36px;

  background: transparent;
  color: var(--tool-text);
  border: none;
  border-radius: var(--tool-radius-sm);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;

  font-size: var(--tool-font-size);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

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

.tool-btn:active {
  background: var(--tool-bg-secondary);
}

.tool-btn.active {
  background: var(--tool-accent);
  color: var(--tool-text);
}

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

/* Icon-only button */
.tool-btn-icon {
  padding: 8px;
}

/* Primary button */
.tool-btn-primary {
  background: var(--tool-accent);
}

.tool-btn-primary:hover {
  background: var(--tool-accent-hover);
}

/* ===== Toolbar Divider ===== */
.tool-divider {
  width: 1px;
  height: 24px;
  background: var(--tool-border);
  margin: 0 4px;
}

/* ===== Toolbar Badge ===== */
.tool-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-width: 18px;
  height: 18px;
  padding: 0 5px;

  background: var(--tool-accent);
  color: var(--tool-text);
  border-radius: 9px;

  font-size: 10px;
  font-weight: 600;
}

/* Badge on button */
.tool-btn .tool-badge {
  position: absolute;
  top: -4px;
  right: -4px;
}

.tool-btn-with-badge {
  position: relative;
}

/* ===== Version Selector ===== */
.tool-select {
  appearance: none;
  background: var(--tool-bg-secondary);
  color: var(--tool-text);
  border: 1px solid var(--tool-border);
  border-radius: var(--tool-radius-sm);
  padding: 6px 28px 6px 10px;
  font-size: var(--tool-font-size);
  cursor: pointer;

  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888888' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.tool-select:hover {
  border-color: var(--tool-text-muted);
}

.tool-select:focus {
  outline: none;
  border-color: var(--tool-accent);
}

/* ===== Comment Pin ===== */
.tool-pin {
  position: absolute;
  z-index: var(--tool-z-pins);

  width: 28px;
  height: 28px;

  display: flex;
  align-items: center;
  justify-content: center;

  background: var(--tool-accent);
  color: var(--tool-text);
  border: 2px solid var(--tool-text);
  border-radius: 50% 50% 50% 0;

  font-size: 12px;
  font-weight: 600;

  cursor: pointer;
  transform: rotate(-45deg);
  transition: transform 0.15s ease, background 0.15s ease;
}

.tool-pin:hover {
  transform: rotate(-45deg) scale(1.1);
  background: var(--tool-accent-hover);
}

.tool-pin span {
  transform: rotate(45deg);
}

.tool-pin.resolved {
  background: var(--tool-text-muted);
  opacity: 0.6;
}

/* ===== Comment Popup ===== */
.tool-popup {
  position: absolute;
  z-index: var(--tool-z-popups);

  width: 320px;

  background: var(--tool-bg);
  border: 1px solid var(--tool-border);
  border-radius: var(--tool-radius);
  box-shadow: 0 8px 32px var(--tool-shadow);

  overflow: hidden;
}

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

.tool-popup-title {
  font-weight: 600;
  color: var(--tool-text);
}

.tool-popup-close {
  background: none;
  border: none;
  color: var(--tool-text-muted);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-popup-close:hover {
  color: var(--tool-text);
}

.tool-popup-body {
  padding: 16px;
  max-height: 300px;
  overflow-y: auto;
}

.tool-popup-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--tool-border);
  display: flex;
  gap: 8px;
}

/* ===== Comment Panel (Side) ===== */
.tool-panel {
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: var(--tool-z-panel);

  width: 360px;

  background: var(--tool-bg);
  border-left: 1px solid var(--tool-border);
  box-shadow: -4px 0 20px var(--tool-shadow);

  display: flex;
  flex-direction: column;

  transform: translateX(100%);
  transition: transform 0.2s ease;
}

.tool-panel.open {
  transform: translateX(0);
}

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

.tool-panel-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--tool-text);
}

.tool-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.tool-panel-footer {
  padding: 16px;
  border-top: 1px solid var(--tool-border);
}

/* ===== Comment Thread ===== */
.tool-thread {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--tool-border);
}

.tool-thread:last-child {
  border-bottom: none;
}

.tool-comment {
  margin-bottom: 12px;
}

.tool-comment-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.tool-comment-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--tool-accent);
  color: var(--tool-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
}

.tool-comment-author {
  font-weight: 600;
  color: var(--tool-text);
  font-size: var(--tool-font-size-sm);
}

.tool-comment-time {
  color: var(--tool-text-muted);
  font-size: var(--tool-font-size-sm);
}

.tool-comment-text {
  color: var(--tool-text);
  line-height: 1.5;
}

/* ===== Comment Input ===== */
.tool-input {
  width: 100%;
  padding: 10px 12px;

  background: var(--tool-bg-secondary);
  color: var(--tool-text);
  border: 1px solid var(--tool-border);
  border-radius: var(--tool-radius-sm);

  font-size: var(--tool-font-size);
  resize: none;
}

.tool-input::placeholder {
  color: var(--tool-text-muted);
}

.tool-input:focus {
  outline: none;
  border-color: var(--tool-accent);
}

.tool-textarea {
  min-height: 80px;
}

/* ===== Mode Banner (Comment Mode Active) ===== */
.tool-mode-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--tool-z-overlay);

  padding: 10px 16px;

  background: var(--tool-accent);
  color: var(--tool-text);

  display: flex;
  align-items: center;
  justify-content: space-between;

  font-size: var(--tool-font-size);
  font-weight: 500;
}

.tool-mode-banner-text {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ===== Tool Icon ===== */
.tool-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
}

.tool-icon svg {
  width: 100%;
  height: 100%;
}

/* Icon colors in toolbar - gray default, accent on hover */
.tool-toolbar .tool-icon svg,
.tool-toolbar .tool-icon svg path,
.tool-toolbar .tool-icon svg circle,
.tool-toolbar .tool-icon svg rect,
.tool-toolbar .tool-icon svg line,
.tool-toolbar .tool-icon svg polyline,
.tool-toolbar .tool-icon svg polygon {
  stroke: var(--tool-text-muted) !important;
  fill: none !important;
}

.tool-toolbar .tool-btn:hover .tool-icon svg,
.tool-toolbar .tool-btn:hover .tool-icon svg path,
.tool-toolbar .tool-btn:hover .tool-icon svg circle,
.tool-toolbar .tool-btn:hover .tool-icon svg rect,
.tool-toolbar .tool-btn:hover .tool-icon svg line,
.tool-toolbar .tool-btn:hover .tool-icon svg polyline,
.tool-toolbar .tool-btn:hover .tool-icon svg polygon {
  stroke: var(--tool-accent) !important;
}

.tool-toolbar .tool-btn.active .tool-icon svg,
.tool-toolbar .tool-btn.active .tool-icon svg path,
.tool-toolbar .tool-btn.active .tool-icon svg circle,
.tool-toolbar .tool-btn.active .tool-icon svg rect,
.tool-toolbar .tool-btn.active .tool-icon svg line,
.tool-toolbar .tool-btn.active .tool-icon svg polyline,
.tool-toolbar .tool-btn.active .tool-icon svg polygon {
  stroke: var(--tool-text) !important;
}

/* ===== Animations ===== */
@keyframes tool-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes tool-slide-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tool-popup {
  animation: tool-slide-up 0.15s ease;
}

/* ===== Scrollbar Styling ===== */
.tool-panel-body::-webkit-scrollbar,
.tool-popup-body::-webkit-scrollbar {
  width: 6px;
}

.tool-panel-body::-webkit-scrollbar-track,
.tool-popup-body::-webkit-scrollbar-track {
  background: transparent;
}

.tool-panel-body::-webkit-scrollbar-thumb,
.tool-popup-body::-webkit-scrollbar-thumb {
  background: var(--tool-border);
  border-radius: 3px;
}

.tool-panel-body::-webkit-scrollbar-thumb:hover,
.tool-popup-body::-webkit-scrollbar-thumb:hover {
  background: var(--tool-text-muted);
}