/* ========== CSS Button Generator Tool V1.0 ========== */
/* Light theme: inherit site defaults, only tool-specific extras */
:root {
  --color-success: #16a34a;
  --color-error: #dc2626;
  --color-btn-hover: #e2e8f0;
  --color-code-bg: #f1f5f9;
  --color-code-text: #334155;
  --color-tool-bg: #ffffff;
}

.tool-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

.tool-header {
  text-align: center;
  margin-bottom: 24px;
}

.tool-header h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.tool-header .tool-desc {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Toolbar */
.tool-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 16px;
  padding: 14px;
  background: var(--color-bg-card);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  background: var(--color-bg-hover);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

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

.tool-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Main Layout */
.tool-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 420px;
  gap: 24px;
  margin-bottom: 20px;
}

.tool-layout > .style-panel {
  order: 1;
}

.tool-layout > .center-panel {
  order: 2;
}

.tool-layout > .settings-panel {
  order: 3;
}

/* Style Library (Left) */
.style-panel {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px;
  max-height: 900px;
  overflow-y: auto;
  min-width: 0;
}

.style-panel-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 12px;
}

.style-group-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 14px 0 6px;
  grid-column: 1 / -1;
}

.style-preset-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.style-preset-btn {
  width: 100%;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px 8px;
  white-space: normal;
  text-align: center;
}

.style-preset-preview {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  min-height: 38px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  overflow: hidden;
  white-space: nowrap;
}

.style-preset-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text);
}

/* Center Column (Preview + Code) */
.center-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

/* Settings Column (Right) */
.settings-panel {
  min-width: 0;
}

/* Settings Panel */
.tool-settings {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  max-height: 900px;
  overflow-y: auto;
}

.tool-settings::-webkit-scrollbar {
  width: 6px;
}

.tool-settings::-webkit-scrollbar-track {
  background: transparent;
}

.tool-settings::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

/* Collapsible Groups */
.collapse-group {
  margin-bottom: 4px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.collapse-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-heading);
  cursor: pointer;
  user-select: none;
  transition: background 0.2s;
  background: var(--color-bg-hover);
}

.collapse-header:hover {
  background: var(--color-border);
}

.collapse-header .collapse-icon {
  font-size: 10px;
  transition: transform 0.2s;
  color: var(--color-muted);
}

.collapse-header.collapsed .collapse-icon {
  transform: rotate(-90deg);
}

.collapse-body {
  padding: 12px 14px;
  border-top: 1px solid var(--color-border);
  display: block;
}

.collapse-body.hidden {
  display: none;
}

/* Setting rows */
.setting-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.setting-row:last-child {
  margin-bottom: 0;
}

.setting-row label {
  font-size: 12px;
  color: var(--color-text);
  min-width: 60px;
  flex-shrink: 0;
}

.setting-row label.toggle-switch {
  min-width: 30px;
  width: 30px;
}

.setting-row .label-sm {
  min-width: 30px;
  font-size: 11px;
}

.setting-row select,
.setting-row input[type="text"],
.setting-row input[type="number"] {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--color-border);
  border-radius: 5px;
  font-size: 12px;
  background: var(--color-tool-bg);
  color: var(--color-text);
  min-width: 0;
}

.setting-row select:focus,
.setting-row input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.12);
}

.setting-row input[type="color"] {
  width: 30px;
  height: 30px;
  padding: 1px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  cursor: pointer;
  background: none;
  flex: none;
}

.setting-row input[type="range"] {
  flex: 1;
  accent-color: var(--color-primary);
  min-width: 60px;
}

.range-value {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary);
  min-width: 28px;
  text-align: right;
}

.setting-row .color-swatch {
  width: 20px;
  height: 20px;
  border-radius: 3px;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.setting-row .inline-flex {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  width: 30px;
  height: 17px;
  flex-shrink: 0;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: #cbd5e1;
  border-radius: 20px;
  transition: 0.3s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 13px;
  height: 13px;
  left: 2px;
  bottom: 2px;
  background: var(--color-muted);
  border-radius: 50%;
  transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--color-primary);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(14px);
  background: #fff;
}

/* Inline SVG icon select */
.icon-select-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.icon-select-item {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  cursor: pointer;
  background: var(--color-tool-bg);
  color: var(--color-text);
  transition: all 0.2s;
}

.icon-select-item:hover {
  border-color: var(--color-primary);
}

.icon-select-item.active {
  border-color: var(--color-primary);
  background: var(--color-bg-active);
  color: var(--color-primary);
}

/* Preview Panel */
.tool-preview {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.preset-label {
  font-size: 11px;
  color: var(--color-muted);
  background: var(--color-bg-hover);
  padding: 3px 10px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
}

.preview-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  width: 100%;
  position: relative;
}

.preview-btn-wrapper {
  position: relative;
  display: inline-block;
}

#previewBtn {
  position: relative;
  z-index: 1;
  overflow: hidden;
  cursor: pointer;
}

/* State tabs */
.state-tabs {
  display: flex;
  gap: 4px;
}

.state-tab {
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 500;
  background: var(--color-white);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.2s;
}

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

.state-tab.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Code Output Area */
.code-output-area {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.code-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.code-tab {
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  background: var(--color-white);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  transition: all 0.2s;
}

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

.code-tab.active {
  background: var(--color-code-bg);
  color: var(--color-primary);
  border-bottom-color: var(--color-code-bg);
}

.code-output {
  width: 100%;
  min-height: 360px;
  padding: 14px;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 0 6px 6px 6px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-code-text);
  direction: ltr;
  text-align: left;
  unicode-bidi: embed;
  resize: vertical;
  tab-size: 2;
  white-space: pre;
  overflow-x: auto;
}

.code-output:focus {
  outline: none;
  border-color: var(--color-primary);
}

.code-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.code-actions label {
  font-size: 12px;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.code-actions input[type="checkbox"] {
  accent-color: var(--color-primary);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  font-size: 12px;
  font-weight: 600;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  margin-left: auto;
}

.copy-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

/* Status */
.status-box {
  padding: 10px 16px;
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 13px;
  display: none;
}

.status-box.show {
  display: block;
}

.status-success {
  background: rgba(22,163,74,0.1);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.status-error {
  background: rgba(220,38,38,0.1);
  border: 1px solid var(--color-error);
  color: var(--color-error);
}

.status-info {
  background: rgba(37,99,235,0.1);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

/* Info Section */
.tool-info {
  margin-top: 32px;
  padding: 24px;
  background: var(--color-bg-card);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.tool-info h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.tool-info h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-heading);
  margin: 20px 0 12px;
}

.tool-info p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 12px;
}

.tool-info ul {
  margin: 0 0 16px 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.tool-info li {
  margin-bottom: 6px;
}

.tool-info code {
  background: var(--color-bg-hover);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  color: var(--color-primary);
}

.tool-info .info-tip {
  padding: 12px 16px;
  background: rgba(37,99,235,0.08);
  border-radius: 8px;
  color: var(--color-primary);
  margin-top: 16px;
}

/* Inner subgroup */
.sub-group {
  padding: 8px;
  margin-bottom: 8px;
  background: var(--color-bg-hover);
  border-radius: 6px;
  border: 1px solid var(--color-border);
}

.sub-group-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-muted);
  margin-bottom: 6px;
}

/* Corner independent grid */
.corner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 12px;
}

.corner-grid .setting-row {
  margin-bottom: 0;
}

/* Responsive */
@media (max-width: 1200px) {
  .tool-layout {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .settings-panel {
    grid-column: 1 / -1;
  }

  .tool-settings {
    max-height: none;
  }
}

@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }

  .tool-container {
    padding: 16px;
  }

  .tool-settings {
    max-height: none;
  }

  .style-panel {
    max-height: none;
  }
}

@media (max-width: 600px) {
  .tool-header h1 {
    font-size: 24px;
  }

  .tool-container {
    padding: 12px;
  }

  .setting-row {
    flex-wrap: wrap;
  }

  .tool-toolbar {
    gap: 5px;
    padding: 10px;
  }

  .tool-btn {
    padding: 4px 8px;
    font-size: 11px;
  }

  .code-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .copy-btn {
    margin-left: 0;
  }
}

/* ========== Animation Keyframes ========== */
@keyframes glow-pulse {
  0% { box-shadow: 0 0 5px var(--g-color); }
  100% { box-shadow: 0 0 20px var(--g-color), 0 0 40px var(--g-color); }
}

@keyframes slide-reveal {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(0); }
}

@keyframes progress-fill {
  0% { background-size: 0% 100%; }
  100% { background-size: 100% 100%; }
}

@keyframes border-snake {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes pulse-scale {
  0% { transform: scale(1); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

@keyframes ripple-effect {
  0% { transform: scale(0); opacity: 0.5; }
  100% { transform: scale(4); opacity: 0; }
}

@keyframes rotate-y {
  0% { transform: perspective(500px) rotateY(0deg); }
  100% { transform: perspective(500px) rotateY(360deg); }
}

@keyframes fill-rise {
  0% { background-position: 0 100%; background-size: 100% 0%; }
  100% { background-position: 0 0; background-size: 100% 100%; }
}