/* ============================================
   tools.css - 常用工具页面样式
   ============================================ */

/* ---------- 导航栏工具下拉菜单 ---------- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-dropdown-caret {
  width: 14px;
  height: 14px;
  transition: transform 0.2s;
}

.nav-dropdown.open .nav-dropdown-caret {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 360px;
  padding: 12px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  z-index: 100;
  display: flex;
  gap: 8px;
}

.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-dropdown-col a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s, background 0.15s;
}

.nav-dropdown-col a:hover {
  color: var(--primary);
  background: rgba(120, 150, 220, 0.08);
}

/* ---------- 工具页面 ---------- */
.tool-category {
  margin-bottom: 40px;
}

.tool-category-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.tool-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.tool-item:hover {
  color: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 2px 12px rgba(0, 153, 184, 0.12);
  transform: translateY(-1px);
}

.tool-item-name {
  flex: 1;
}

.tool-item-arrow {
  width: 16px;
  height: 16px;
  opacity: 0.4;
  transition: opacity 0.2s, transform 0.2s;
}

.tool-item:hover .tool-item-arrow {
  opacity: 1;
  transform: translateX(2px);
}

/* ---------- 响应式 ---------- */

/* ---------- 工具详情页 ---------- */
.tool-detail-head {
  margin-bottom: 24px;
}

.tool-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-2);
  font-size: 14px;
  margin-bottom: 8px;
}

.tool-back svg {
  width: 16px;
  height: 16px;
}

.tool-back:hover {
  color: var(--primary);
}

.tool-detail-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-1);
}

.tool-detail-body {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.tool-sidebar {
  width: 200px;
  flex-shrink: 0;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
  position: sticky;
  top: 80px;
}

.tool-sidebar-group {
  margin-bottom: 16px;
}

.tool-sidebar-group h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  padding: 0 8px;
}

.tool-sidebar-link {
  display: block;
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-2);
  transition: color 0.15s, background 0.15s;
}

.tool-sidebar-link:hover {
  color: var(--primary);
  background: rgba(120, 150, 220, 0.08);
}

.tool-sidebar-link.active {
  color: var(--primary);
  font-weight: 600;
  background: rgba(0, 153, 184, 0.08);
}

.tool-content {
  flex: 1;
  min-width: 0;
}

.tool-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 720px;
}

.tool-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tool-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
}

.tool-field textarea,
.tool-field input[type="text"],
.tool-field input[type="password"],
.tool-field input[type="number"],
.tool-field select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: monospace;
  transition: border-color 0.2s;
}

.tool-field textarea:focus,
.tool-field input:focus,
.tool-field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 153, 184, 0.1);
}

.tool-form .btn-primary {
  align-self: flex-start;
  padding: 10px 24px;
  border: none;
  border-radius: 8px;
  background: var(--gradient);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}

.tool-form .btn-primary:hover {
  opacity: 0.9;
}

.tool-form .btn-primary:active {
  transform: scale(0.98);
}

.tool-result {
  margin-top: 24px;
  max-width: 100%;
}

.tool-result-output pre {
  padding: 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-all;
}

.tool-result-output pre code.hljs {
  background: transparent;
  padding: 0;
}

.CodeMirror {
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  min-height: 300px;
  max-height: 500px;
}

.CodeMirror-scroll {
  max-height: 500px;
}

.tool-result-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}

.tool-copy-btn {
  padding: 4px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.tool-copy-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.tool-result-extra {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tool-result-field {
  display: flex;
  gap: 8px;
  font-size: 13px;
}

.tool-result-label {
  font-weight: 600;
  color: var(--text-2);
  min-width: 80px;
}

.tool-result-value {
  color: var(--text-1);
  word-break: break-all;
}

/* Pinyin Dictionary Result */
.pinyin-result {
  margin-top: 16px;
}
.pinyin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.pinyin-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  font-weight: 600;
  color: var(--text-2);
  white-space: nowrap;
}
.pinyin-table td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  color: var(--text-1);
}
.pinyin-table .pinyin-char {
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  width: 60px;
}
.pinyin-count {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-2);
}

.tool-loading {
  padding: 16px;
  color: var(--text-2);
  font-size: 14px;
}

.tool-error {
  padding: 12px 16px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  color: #ef4444;
  font-size: 14px;
}

.tool-placeholder {
  padding: 32px;
  text-align: center;
  color: var(--text-2);
  font-size: 14px;
}

.tool-hint {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 4px;
}

.tool-ws-output {
  max-height: 500px;
  overflow-y: auto;
  padding: 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: monospace;
  font-size: 13px;
  line-height: 1.6;
}

.tool-ws-line {
  padding: 2px 0;
  color: var(--text-1);
}

.tool-ws-line.tool-ws-ok {
  color: #22c55e;
  font-weight: 600;
}

.tool-ws-line.tool-ws-fail {
  color: #ef4444;
}

.tool-ws-info {
  padding: 6px 0;
  color: var(--primary);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  margin-bottom: 6px;
}

.tool-ws-done {
  padding: 8px 0 4px;
  color: var(--text-2);
  font-style: italic;
  border-top: 1px solid var(--border);
  margin-top: 6px;
}

/* ---------- WebSocket 工具表格 ---------- */
.ws-table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0;
  font-size: 13px;
}
.ws-table thead th {
  text-align: left;
  padding: 8px 12px;
  background: var(--bg-1);
  border-bottom: 2px solid var(--border-strong);
  color: var(--text-2);
  font-weight: 600;
  white-space: nowrap;
}
.ws-table tbody td {
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-1);
  font-family: var(--font-mono);
}
.ws-table tbody tr.row-ok td {
  color: var(--success);
}
.ws-table tbody tr.row-fail td {
  color: var(--danger);
}
.ws-table tbody tr:hover td {
  background: var(--bg-1);
}

/* ---------- API 测试 - Postman 风格 ---------- */
.api-test-form {
  max-width: 100% !important;
  gap: 0 !important;
}

.api-url-bar {
  display: flex;
  gap: 0;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 0;
  background: var(--bg-2);
}

.api-method-select {
  border: none;
  border-right: 1px solid var(--border);
  border-radius: 0;
  padding: 10px 12px;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg-1);
  color: var(--primary);
  cursor: pointer;
  min-width: 90px;
  appearance: auto;
}

.api-method-select:focus {
  outline: none;
}

.api-url-input {
  flex: 1;
  border: none !important;
  border-radius: 0 !important;
  padding: 10px 14px !important;
  font-size: 14px !important;
  font-family: monospace;
  background: var(--bg-2) !important;
  color: var(--text-1) !important;
}

.api-url-input:focus {
  outline: none;
  box-shadow: none !important;
}

.api-send-btn {
  border: none !important;
  border-radius: 0 !important;
  padding: 10px 28px !important;
  font-size: 14px !important;
  font-weight: 600;
  white-space: nowrap;
}

/* Tabs */
.api-tabs {
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 8px 8px;
  background: var(--bg-1);
  overflow: hidden;
}

.api-tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  padding: 0 4px;
}

.api-tab-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.api-tab-link:hover {
  color: var(--text-1);
}

.api-tab-link.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.api-tab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 9px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-2);
  line-height: 1;
}

.api-tab-badge.non-zero {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.api-tab-pane {
  display: none;
  padding: 16px;
}

.api-tab-pane.active {
  display: block;
}

/* KV Table */
.api-kv-table {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.api-kv-header {
  display: grid;
  grid-template-columns: 32px 1fr 1fr 1.2fr 32px;
  gap: 0;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.api-kv-header > div {
  padding: 8px 10px;
}

.api-kv-header > div:not(:last-child) {
  border-right: 1px solid var(--border);
}

.api-kv-rows {
  display: flex;
  flex-direction: column;
}

.api-kv-rows:empty::after {
  content: attr(data-empty-text);
  display: block;
  padding: 24px;
  text-align: center;
  color: var(--text-3);
  font-size: 13px;
}

.api-kv-row {
  display: grid;
  grid-template-columns: 32px 1fr 1fr 1.2fr 32px;
  gap: 0;
  border-bottom: 1px solid var(--border);
  align-items: center;
}

.api-kv-row:last-child {
  border-bottom: none;
}

.api-kv-row > div {
  padding: 0;
  border-right: 1px solid var(--border);
}

.api-kv-row > div:last-child {
  border-right: none;
}

.api-kv-check {
  display: flex;
  align-items: center;
  justify-content: center;
}

.api-kv-check input[type="checkbox"] {
  width: 14px;
  height: 14px;
  cursor: pointer;
  accent-color: var(--primary);
}

.api-kv-row input[type="text"],
.api-kv-row textarea {
  width: 100%;
  border: none !important;
  border-radius: 0 !important;
  padding: 8px 10px !important;
  font-size: 13px !important;
  font-family: monospace !important;
  background: transparent !important;
  color: var(--text-1) !important;
}

.api-kv-row input[type="text"]:focus,
.api-kv-row textarea:focus {
  outline: none;
  background: var(--bg-2) !important;
  box-shadow: inset 0 0 0 2px rgba(0, 153, 184, 0.15) !important;
}

.api-kv-row.disabled {
  opacity: 0.5;
}

.api-kv-row.disabled input,
.api-kv-row.disabled textarea {
  text-decoration: line-through;
}

.api-kv-action {
  display: flex;
  align-items: center;
  justify-content: center;
}

.api-kv-delete {
  border: none;
  background: transparent;
  color: var(--text-3);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}

.api-kv-delete:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

.api-kv-add {
  margin-top: 8px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  padding: 8px 16px;
  background: transparent;
  color: var(--text-2);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.api-kv-add:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Body Tab */
.api-body-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  align-items: center;
}

.api-body-type-select,
.api-raw-lang-select {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 13px;
  cursor: pointer;
}

.api-body-type-select:focus,
.api-raw-lang-select:focus {
  outline: none;
  border-color: var(--primary);
}

.api-body-editor-wrap {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.api-body-textarea {
  width: 100%;
  border: none !important;
  border-radius: 0 !important;
  padding: 12px 14px !important;
  font-size: 13px !important;
  font-family: monospace !important;
  background: var(--bg-2) !important;
  color: var(--text-1) !important;
  resize: vertical;
  min-height: 200px;
}

.api-body-textarea:focus {
  outline: none;
}

/* Auth Tab */
.api-auth-type-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.api-auth-type-row label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  white-space: nowrap;
}

.api-auth-type-select {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 13px;
  cursor: pointer;
}

.api-auth-type-select:focus {
  outline: none;
  border-color: var(--primary);
}

.api-auth-fields {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
}

.api-auth-fields[style*="display: none"] ~ .api-auth-fields,
.api-auth-fields:empty {
  display: none;
}

.api-auth-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.api-auth-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
}

.api-auth-field input,
.api-auth-field select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 13px;
  font-family: monospace;
}

.api-auth-field input:focus,
.api-auth-field select:focus {
  outline: none;
  border-color: var(--primary);
}

/* Timeout */
.api-timeout-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 0 4px;
}

.api-timeout-row label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  white-space: nowrap;
}

.api-timeout-row input {
  width: 70px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 13px;
}

.api-timeout-row input:focus {
  outline: none;
  border-color: var(--primary);
}

/* ---------- API 测试 - 响应区域 ---------- */
.api-response-wrapper {
  margin-top: 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-1);
}

.api-response-status-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  font-size: 13px;
  font-weight: 600;
  flex-wrap: wrap;
}

.api-response-status-code {
  font-size: 16px;
  font-weight: 700;
}

.api-response-status-code.ok { color: #22c55e; }
.api-response-status-code.err { color: #ef4444; }
.api-response-status-code.warn { color: #f59e0b; }

.api-response-status-text {
  color: var(--text-2);
  font-weight: 400;
}

.api-response-meta {
  display: flex;
  gap: 12px;
  margin-left: auto;
}

.api-response-meta-item {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-2);
}

.api-response-meta-item strong {
  color: var(--text-1);
  font-weight: 600;
}

.api-response-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  padding: 0 4px;
}

.api-response-tab {
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.api-response-tab:hover {
  color: var(--text-1);
}

.api-response-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.api-response-tab-tools {
  margin-left: auto;
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 4px 8px;
}

.api-response-view-btn {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}

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

.api-response-pane {
  display: none;
  padding: 0;
}

.api-response-pane.active {
  display: block;
}

.api-response-body {
  padding: 0;
}

.api-response-body pre {
  margin: 0;
  padding: 16px;
  background: var(--bg-2);
  overflow-x: auto;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 500px;
  overflow-y: auto;
  font-family: 'Consolas', 'Monaco', monospace;
  line-height: 1.5;
}

.api-response-body pre code.hljs {
  background: transparent;
  padding: 0;
}

.api-response-headers-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.api-response-headers-table th,
.api-response-headers-table td {
  padding: 8px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.api-response-headers-table th {
  background: var(--bg-2);
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.3px;
}

.api-response-headers-table td {
  color: var(--text-1);
  font-family: monospace;
}

.api-response-headers-table td:first-child {
  font-weight: 600;
  white-space: nowrap;
  width: 30%;
}

.api-response-empty {
  padding: 48px 16px;
  text-align: center;
  color: var(--text-3);
  font-size: 14px;
}

.api-response-error {
  padding: 16px;
  color: #ef4444;
  font-size: 14px;
  background: rgba(239, 68, 68, 0.05);
}

/* Dark theme adjustments */
[data-theme="dark"] .api-method-select {
  color: #5ec3e8;
}

[data-theme="dark"] .api-tab-badge {
  background: #2a2a3a;
  border-color: #3a3a4a;
}

[data-theme="dark"] .api-tab-badge.non-zero {
  background: #0099b8;
  border-color: #0099b8;
}

/* Responsive */
@media (max-width: 768px) {
  .api-url-bar {
    flex-direction: column;
  }

  .api-method-select {
    border-right: none;
    border-bottom: 1px solid var(--border);
    width: 100%;
  }

  .api-send-btn {
    width: 100%;
  }

  .api-kv-header,
  .api-kv-row {
    grid-template-columns: 28px 1fr 1fr 32px;
  }

  .api-kv-col-desc,
  .api-kv-header .api-kv-col-desc {
    display: none;
  }

  .api-response-meta {
    margin-left: 0;
    width: 100%;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .nav-dropdown-menu {
    position: static;
    min-width: 100%;
    flex-direction: column;
    box-shadow: none;
    border: none;
    padding: 0 0 0 16px;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-dropdown-caret {
    display: none;
  }

  .tool-grid {
    grid-template-columns: 1fr;
  }

  .tool-detail-body {
    flex-direction: column;
    align-items: stretch;
  }

  .tool-sidebar {
    width: 100%;
    position: static;
    max-height: none;
    margin-bottom: 16px;
  }

  .tool-form {
    max-width: 100%;
  }
}

/* ---------- 子网掩码计算器 ---------- */
.subnet-form {
  max-width: 100% !important;
  margin-bottom: 16px;
}

.subnet-box {
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.subnet-box h3 {
  margin: 0 0 16px 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-1);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.subnet-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}
.subnet-label {
  font-weight: 600;
  white-space: nowrap;
  min-width: 80px;
  font-size: 13px;
  color: var(--text-2);
}
.subnet-row .octet {
  width: 48px;
  text-align: center;
  padding: 6px 4px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
}
.subnet-row .octet-binary {
  width: 90px;
  text-align: center;
  padding: 6px 4px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 13px;
  font-family: var(--font-mono);
}
.subnet-row .octet-hex {
  width: 40px;
  text-align: center;
  padding: 6px 4px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}
.subnet-row .octet-long {
  width: 160px;
  text-align: center;
  padding: 6px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
}
.subnet-row .octet::placeholder,
.subnet-row .octet-binary::placeholder,
.subnet-row .octet-hex::placeholder,
.subnet-row .octet-long::placeholder {
  color: var(--text-3);
}
.subnet-row .ip-dot {
  color: var(--text-3);
  font-weight: bold;
}
.subnet-row select {
  padding: 6px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 13px;
}

/* 子网计算器按钮 */
.subnet-row .btn-sm,
.subnet-mode-selector + .subnet-form .btn-sm {
  padding: 6px 16px;
  font-size: 13px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: opacity 0.2s, transform 0.1s;
}
.subnet-row .btn-primary.btn-sm {
  background: var(--gradient);
  color: #fff;
}
.subnet-row .btn-primary.btn-sm:hover {
  opacity: 0.9;
}
.subnet-row .btn-primary.btn-sm:active {
  transform: scale(0.98);
}
.subnet-row .btn-secondary.btn-sm {
  background: var(--bg-2);
  color: var(--text-2);
  border: 1px solid var(--border);
}
.subnet-row .btn-secondary.btn-sm:hover {
  border-color: var(--border-strong);
  color: var(--text-1);
}

.subnet-result {
  margin-top: 16px;
}
.subnet-result-box {
  padding: 16px;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.subnet-result-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}
.subnet-result-row:last-child {
  border-bottom: none;
}
.subnet-result-label {
  font-weight: 600;
  min-width: 120px;
  font-size: 13px;
  color: var(--text-2);
}
.subnet-result-value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-1);
}
.ip-octets {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}
.ip-octet {
  display: inline-block;
  min-width: 32px;
  text-align: center;
  padding: 3px 8px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--font-mono);
  color: var(--text-1);
}
.ip-octet-wide {
  min-width: 80px;
}
.ip-dot {
  color: var(--text-3);
  font-weight: bold;
}

.subnet-loading {
  padding: 16px;
  text-align: center;
  color: var(--text-3);
}
.subnet-error {
  padding: 12px 16px;
  color: var(--danger);
  background: rgba(229, 72, 77, 0.08);
  border: 1px solid rgba(229, 72, 77, 0.2);
  border-radius: 6px;
  font-size: 13px;
}

.subnet-info {
  padding: 16px 0;
}
.subnet-info p {
  margin: 0 0 16px 0;
  color: var(--text-2);
  font-size: 14px;
}
.subnet-info-table {
  width: 100%;
  border-collapse: collapse;
}
.subnet-info-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-1);
}
.subnet-info-table td:first-child {
  font-family: var(--font-mono);
  white-space: nowrap;
}

.hidden {
  display: none !important;
}

/* ---------- 科学计算器 ---------- */
.calc-container {
  max-width: 520px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.calc-display {
  font-family: var(--font-mono);
  font-size: 28px;
  text-align: right;
  padding: 16px 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  min-height: 60px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  margin-bottom: 12px;
}

.calc-memory-indicator {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
  min-height: 16px;
  margin-bottom: 8px;
  padding-left: 4px;
}

.calc-options {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.calc-radio-group {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.calc-radio-group label {
  display: inline-flex;
  align-items: center;
  min-width: 100px;
  gap: 4px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.calc-radio-group label:hover {
  border-color: var(--border-strong);
  color: var(--text-1);
}
.calc-radio-group input[type="radio"] {
  accent-color: var(--primary);
  width: 14px;
  height: 14px;
}
.calc-radio-group input[type="radio"]:checked + span {
  color: var(--primary);
  font-weight: 600;
}

.calc-checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.calc-checkbox-row label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
  white-space: nowrap;
}
.calc-checkbox-row label:hover {
  border-color: var(--border-strong);
  color: var(--text-1);
}
.calc-checkbox-row input[type="checkbox"] {
  accent-color: var(--primary);
  width: 14px;
  height: 14px;
}
.calc-input-box {
  flex: 1;
  min-width: 60px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
}
.calc-input-box:focus {
  outline: none;
  border-color: var(--primary);
}
.calc-mem-display {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-3);
  padding: 4px 8px;
  min-width: 28px;
  text-align: center;
}
.calc-mem-display.active {
  color: var(--primary);
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr) 10px repeat(6, 1fr);
  gap: 6px;
}
.calc-grid-spacer {
  width: 100%;
  height: 1px;
}

.calc-btn {
  padding: 10px 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.08s;
  text-align: center;
  user-select: none;
}
.calc-btn:hover {
  border-color: var(--border-strong);
  background: var(--bg-1);
}
.calc-btn:active {
  transform: scale(0.95);
}

.calc-btn-num {
  font-size: 16px;
  font-weight: 700;
}
.calc-btn-op {
  color: var(--primary);
  font-size: 16px;
  font-weight: 700;
}
.calc-btn-fn {
  font-size: 13px;
  color: var(--text-2);
}
.calc-btn-hex {
  color: var(--violet);
  font-size: 15px;
  font-weight: 700;
}
.calc-btn-hex:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.calc-btn-action {
  font-size: 13px;
  color: var(--warning);
  min-width: 64px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  white-space: nowrap;
}
.calc-btn-eq {
  background: var(--gradient);
  color: #fff;
  border: none;
  font-size: 18px;
  font-weight: 700;
}
.calc-btn-eq:hover {
  opacity: 0.9;
  background: var(--gradient);
}

@media (max-width: 540px) {
  .calc-grid {
    grid-template-columns: repeat(4, 1fr) 6px repeat(6, 1fr);
    gap: 4px;
  }
  .calc-btn {
    padding: 8px 2px;
    font-size: 12px;
  }
  .calc-btn-num, .calc-btn-op {
    font-size: 14px;
  }
  .calc-display {
    font-size: 22px;
  }
}

/* ---------- 单位换算器 ---------- */
.uc-container {
  max-width: 100%;
}

.uc-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
}
.uc-tab {
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 8px 8px 0 0;
  transition: color 0.2s, background 0.2s;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
}
.uc-tab:hover {
  color: var(--text-1);
  background: var(--bg-2);
}
.uc-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.uc-container .uc-panel {
  display: none;
}
.uc-container .uc-panel.active {
  display: block;
}

.uc-sub-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-1);
  margin: 16px 0 10px 0;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.uc-sub-title:first-child {
  margin-top: 0;
}

.uc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.uc-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.uc-field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 6px;
}
.uc-field label span {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-3);
  font-family: var(--font-mono);
}

.uc-input-row {
  display: flex;
  gap: 6px;
}
.uc-input-row input[type="number"] {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
  transition: border-color 0.2s;
}
.uc-input-row input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
}
.uc-input-row input[type="number"]::placeholder {
  color: var(--text-3);
}

.uc-convert {
  padding: 8px 14px;
  border: none;
  border-radius: 6px;
  background: var(--gradient);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
}
.uc-convert:hover {
  opacity: 0.9;
}

.uc-clear-all {
  margin-top: 16px;
  padding: 10px 24px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text-2);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.uc-clear-all:hover {
  border-color: var(--danger);
  color: var(--danger);
}

@media (max-width: 768px) {
  .uc-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 480px) {
  .uc-grid {
    grid-template-columns: 1fr;
  }
  .uc-tab {
    padding: 6px 10px;
    font-size: 13px;
  }
}

/* ---------- 编码解码工具 ---------- */
.enc-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.enc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.enc-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
}
.enc-field textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
  resize: vertical;
  box-sizing: border-box;
}
.enc-field textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.enc-key-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.enc-key-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.enc-key-col label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
}
.enc-key-col textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 13px;
  font-family: var(--font-mono);
  resize: vertical;
  box-sizing: border-box;
}
.enc-key-col textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.enc-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.enc-toolbar label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  white-space: nowrap;
}
.enc-toolbar select {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  cursor: pointer;
}
.enc-toolbar input[type="text"],
.enc-toolbar input[type="number"] {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
}
.enc-toolbar input:focus,
.enc-toolbar select:focus {
  outline: none;
  border-color: var(--primary);
}
.enc-toolbar .btn {
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
}
.enc-toolbar .btn:hover {
  opacity: 0.9;
}
.enc-toolbar .btn-primary {
  background: var(--gradient);
  color: #fff;
}
.enc-toolbar .btn-secondary {
  background: var(--bg-2);
  color: var(--text-2);
  border: 1px solid var(--border-strong);
}
.enc-toolbar .btn-secondary:hover {
  border-color: var(--danger);
  color: var(--danger);
}
.enc-toolbar span {
  font-size: 13px;
  color: var(--text-3);
}

/* Unix timestamp format table */
.ts-format-table {
  margin: 8px 0;
}
.ts-format-table h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-1);
  margin: 0 0 8px 0;
}
.ts-format-table .ws-table {
  font-size: 12px;
}
.ts-format-table .ws-table thead th {
  padding: 6px 10px;
}
.ts-format-table .ws-table tbody td {
  padding: 4px 10px;
}

@media (max-width: 768px) {
  .enc-key-row {
    grid-template-columns: 1fr;
  }
}

/* ---------- 调色板工具 ---------- */
.color-palette-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.palette-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.palette-card-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 10px;
}
.color-palette-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.palette-row {
  display: flex;
  gap: 2px;
}
.palette-cell {
  width: 62px;
  height: 32px;
  cursor: pointer;
  border: 1px solid rgba(0, 0, 0, 0.1);
  transition: transform 0.1s;
}
.palette-cell:hover {
  transform: scale(1.25);
  z-index: 1;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.color-palette-gray {
  display: flex;
  gap: 4px;
}
.color-palette-gray .palette-cell {
  flex: 1;
  width: auto;
  height: 32px;
}
.palette-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.palette-toolbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.palette-toolbar-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  white-space: nowrap;
}
.color-palette-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.color-palette-bar .palette-hex-input {
  width: 120px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
  box-sizing: border-box;
}
.color-palette-bar .palette-hex-input:focus {
  outline: none;
  border-color: var(--primary);
}
.color-palette-bar .palette-preview {
  display: inline-block;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: #ffffff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  flex-shrink: 0;
}
.color-palette-bar .btn {
  height: 36px;
  padding: 0 20px;
  font-size: 14px;
  border-radius: 8px;
}
.color-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 20px;
  background: var(--text-1);
  color: var(--bg-1);
  border-radius: 8px;
  font-size: 14px;
  z-index: 9999;
  transition: opacity 0.3s;
  display: none;
}

/* Common colors */
.common-colors-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.common-color-group {
  margin-bottom: 8px;
}
.common-color-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  margin: 0 0 8px 0;
  line-height: 1.5;
}
.common-color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 6px;
}
.common-color-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 6px;
  border-radius: 6px;
  cursor: pointer;
  transition: transform 0.15s;
  min-height: 56px;
}
.common-color-item:hover {
  transform: scale(1.05);
  z-index: 1;
}
.common-color-dark .common-color-hex {
  color: #fff;
}
.common-color-hex {
  font-size: 11px;
  font-weight: 600;
  color: #333;
  font-family: var(--font-mono);
  text-shadow: 0 1px 2px rgba(255,255,255,0.5);
}
.common-color-dark .common-color-hex {
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

/* Traditional colors */
.trad-colors-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.trad-tabs {
  display: flex;
  gap: 8px;
}
.trad-tab {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}
.trad-tab.active {
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
}
.trad-colors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 6px;
}
.trad-color-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 6px;
  border-radius: 6px;
  cursor: pointer;
  transition: transform 0.15s;
  min-height: 56px;
}
.trad-color-item:hover {
  transform: scale(1.05);
  z-index: 1;
}
.trad-color-dark .trad-color-name,
.trad-color-dark .trad-color-hex {
  color: #fff;
}
.trad-color-name {
  font-size: 13px;
  font-weight: 600;
  color: #333;
  line-height: 1.3;
}
.trad-color-hex {
  font-size: 11px;
  color: #666;
  margin-top: 2px;
}

@media (max-width: 768px) {
  .palette-cell {
    width: 20px;
    height: 20px;
  }
  .common-color-grid {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  }
  .trad-colors-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
}

/* Color Picker (传图识色) */
.picker-upload-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}
.picker-upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 40px 20px;
  border: 2px dashed var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-2);
  width: 100%;
  box-sizing: border-box;
  transition: border-color 0.2s, background 0.2s;
}
.picker-upload-placeholder:hover {
  border-color: var(--primary);
  background: var(--bg-2);
}
.picker-upload-placeholder span {
  font-size: 14px;
}
.picker-canvas-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.picker-canvas-hint {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 4px;
}
.picker-canvas {
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: crosshair;
  display: block;
}
.picker-extracted-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 10px;
}
.picker-extracted-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 6px;
}

/* Color Selector (网页颜色选择器) */
.cs-picker-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.cs-native-picker {
  width: 48px;
  height: 48px;
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  padding: 2px;
  background: none;
}
.cs-preview {
  display: inline-block;
  width: 48px;
  height: 48px;
  border: 2px solid var(--border);
  border-radius: 8px;
}
.cs-rgb-row {
  display: flex;
  gap: 16px;
}
.cs-channel {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}
.cs-channel label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
}
.cs-channel input {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
  width: 100%;
  box-sizing: border-box;
}
.cs-channel input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Color Code Query (颜色代码查询) */
.ccq-input-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
.ccq-result {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.ccq-swatch {
  width: 80px;
  height: 80px;
  border-radius: 10px;
  border: 2px solid var(--border);
  flex-shrink: 0;
}
.ccq-fields {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.ccq-field {
  display: flex;
  align-items: center;
  gap: 12px;
}
.ccq-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-2);
  min-width: 36px;
  text-transform: uppercase;
}
.ccq-value {
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--text-1);
}

/* WebSocket Tester */
.ws-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.ws-connect-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
.ws-url-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
}
.ws-url-input:focus {
  outline: none;
  border-color: var(--primary);
}
.ws-status-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.ws-status-label {
  font-weight: 600;
  color: var(--text-2);
}
.ws-status {
  color: var(--text-2);
}
.ws-status-connected {
  color: #22c55e;
  font-weight: 600;
}
.ws-log {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  height: 240px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 13px;
}
.ws-log-entry {
  padding: 2px 0;
  color: var(--text-1);
  line-height: 1.5;
}
.ws-log-success { color: #22c55e; }
.ws-log-error { color: #ef4444; }
.ws-log-send { color: var(--primary); }
.ws-log-recv { color: #3b82f6; }
.ws-send-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.ws-message-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
  resize: vertical;
}
.ws-message-input:focus {
  outline: none;
  border-color: var(--primary);
}

/* ==================== Crontab Generator ==================== */
.cr-gen {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 720px;
}
.cr-presets-label,
.rw-presets-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 10px;
}
.cr-preset-list,
.rw-preset-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.cr-preset-btn,
.rw-preset-btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.cr-preset-btn:hover,
.rw-preset-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.cr-preset-btn.active,
.rw-preset-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.cr-fields {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.cr-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.cr-field-cmd {
  grid-column: 1 / -1;
}
.cr-field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-1);
}
.cr-field input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
}
.cr-field input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 153, 184, 0.1);
}
.cr-hint {
  font-size: 11px;
  color: var(--text-3);
}
.cr-preview {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.cr-preview-header,
.rw-preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.cr-preview-label,
.rw-preview-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
}
.cr-copy-btn,
.rw-copy-btn {
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.cr-copy-btn:hover,
.rw-copy-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.cr-preview-code,
.rw-preview-code {
  padding: 14px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-1);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  margin: 0;
}
.cr-desc {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-2);
}

/* ==================== Rewrite Generator ==================== */
.rw-gen {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 720px;
}
.rw-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
}
.rw-tab {
  padding: 8px 24px;
  border: none;
  background: none;
  color: var(--text-2);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}
.rw-tab:hover {
  color: var(--primary);
}
.rw-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.rw-fields {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.rw-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.rw-field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-1);
}
.rw-field input,
.rw-field select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
}
.rw-field input:focus,
.rw-field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 153, 184, 0.1);
}
.rw-preview {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

@media (max-width: 768px) {
  .cr-fields {
    grid-template-columns: repeat(2, 1fr);
  }
  .rw-fields {
    grid-template-columns: 1fr;
  }
}

/* ==================== Password Generator ==================== */
.pw-gen {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 640px;
}
.pw-output-row {
  display: flex;
  gap: 8px;
}
.pw-display {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--text-1);
  font-size: 18px;
  font-family: var(--font-mono);
  letter-spacing: 1px;
}
.pw-display:focus {
  outline: none;
  border-color: var(--primary);
}
.pw-copy-btn {
  padding: 0 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}
.pw-copy-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.pw-strength {
  display: flex;
  align-items: center;
  gap: 12px;
}
.pw-strength-bar {
  height: 6px;
  width: 0;
  border-radius: 3px;
  background: var(--border);
  transition: width 0.3s, background 0.3s;
  flex: 1;
  max-width: 300px;
}
.pw-strength-0, .pw-strength-1 { background: #ef4444; }
.pw-strength-2 { background: #f59e0b; }
.pw-strength-3 { background: #eab308; }
.pw-strength-4 { background: #22c55e; }
.pw-strength-5 { background: #16a34a; }
.pw-strength-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  min-width: 80px;
}
.pw-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.pw-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
}
.pw-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-2);
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}
.pw-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
}
.pw-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
}
.pw-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pw-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-1);
}
.pw-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}
.pw-generate-btn {
  align-self: flex-start;
  padding: 10px 28px;
}

/* ==================== Regex Tester ==================== */
.rx-gen {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 720px;
}
.rx-presets-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 10px;
}
.rx-preset-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.rx-preset-btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.rx-preset-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.rx-preset-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.rx-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.rx-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
}
.rx-field input,
.rx-field textarea {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
  font-family: var(--font-mono);
}
.rx-field input:focus,
.rx-field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 153, 184, 0.1);
}
.rx-flags {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.rx-flag {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-1);
}
.rx-flag input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* ==================== DES/AES ==================== */
.da-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.tool-field-hint {
  font-size: 12px;
  color: var(--text-3);
}

/* ==================== Info Box ==================== */
.tool-info-box {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: 6px;
  background: var(--bg-2);
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .da-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- SSL 证书检测 ---------- */
.ssl-check-result { margin-top: 16px; }

.ssl-grade-banner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border-radius: 12px;
  margin-bottom: 20px;
}
.ssl-grade-a { background: linear-gradient(135deg, #1a7f37, #2ea44f); color: #fff; }
.ssl-grade-b { background: linear-gradient(135deg, #0969da, #218bff); color: #fff; }
.ssl-grade-c { background: linear-gradient(135deg, #bf8700, #d4a72c); color: #fff; }
.ssl-grade-f { background: linear-gradient(135deg, #cf222e, #f85149); color: #fff; }
.ssl-grade-t { background: linear-gradient(135deg, #6e7681, #8b949e); color: #fff; }

.ssl-grade-label { font-size: 14px; opacity: 0.85; }
.ssl-grade-value { font-size: 42px; font-weight: 800; line-height: 1; }
.ssl-grade-host { font-size: 16px; opacity: 0.9; margin-left: auto; }

.ssl-section {
  margin-bottom: 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.ssl-section h4 {
  padding: 10px 16px;
  margin: 0;
  background: var(--bg-2);
  font-size: 14px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

.ssl-info-table {
  width: 100%;
  border-collapse: collapse;
}
.ssl-info-table td {
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.ssl-info-table tr:last-child td { border-bottom: none; }
.ssl-row-label {
  width: 180px;
  color: var(--text-2);
  white-space: nowrap;
}
.ssl-row-value { word-break: break-all; }

.ssl-version-table {
  width: 100%;
  border-collapse: collapse;
}
.ssl-version-table th,
.ssl-version-table td {
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  text-align: left;
}
.ssl-version-table th { background: var(--bg-2); }

.ssl-ok { color: #2ea44f; font-weight: 600; }
.ssl-err { color: #f85149; font-weight: 600; }
.ssl-warn { color: #d4a72c; font-weight: 600; }

.ssl-pem-details {
  border-top: 1px solid var(--border);
}
.ssl-pem-details summary {
  padding: 8px 16px;
  cursor: pointer;
  font-size: 13px;
  color: var(--primary);
  user-select: none;
}
.ssl-pem-code {
  padding: 12px 16px;
  margin: 0;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-all;
  background: var(--bg-1);
  color: var(--text-2);
  max-height: 300px;
  overflow-y: auto;
}

/* ---------- 浏览器信息检测 ---------- */
.browser-info-result {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.bi-section {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.bi-section > h4 {
  margin: 0;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-1);
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.bi-section > h4::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 16px;
  background: var(--gradient);
  border-radius: 2px;
  flex-shrink: 0;
}

.bi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}

.bi-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  min-height: 42px;
}

.bi-row:nth-child(2n) {
  border-right: none;
}

.bi-row:last-child {
  border-bottom: none;
}

.bi-row.bi-row-full {
  grid-column: 1 / -1;
  border-right: none;
}

.bi-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  white-space: nowrap;
  min-width: 100px;
  flex-shrink: 0;
}

.bi-value {
  font-size: 13px;
  color: var(--text-1);
  word-break: break-all;
  font-family: var(--font-mono, monospace);
  line-height: 1.5;
}

.bi-yes {
  color: #22c55e;
  font-weight: 600;
}

.bi-no {
  color: #ef4444;
  font-weight: 600;
}

.bi-enabled {
  color: #22c55e;
  font-weight: 600;
}

.bi-disabled {
  color: #ef4444;
  font-weight: 600;
}

.bi-fonts {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-1);
  font-family: var(--font-mono, monospace);
  line-height: 1.8;
  word-break: break-all;
}

.bi-fingerprint-section .bi-fingerprint {
  padding: 12px 16px;
  font-size: 18px;
  font-weight: 700;
  font-family: var(--font-mono, monospace);
  color: var(--primary);
  letter-spacing: 1px;
  text-align: center;
  background: var(--bg-1);
  border-radius: 8px;
  margin: 0;
}

@media (max-width: 768px) {
  .bi-grid {
    grid-template-columns: 1fr;
  }
  .bi-row {
    border-right: none;
  }
  .bi-row:nth-child(2n) {
    border-right: none;
  }
}

/* ---------- QR Code Tool ---------- */
.qr-tool {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 720px;
  width: 100%;
}

.qr-section {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  background: var(--bg-2);
}

.qr-section-title {
  margin: 0 0 20px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
}

.qr-type-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.qr-type-tab {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

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

.qr-type-tab:hover:not(.active) {
  border-color: var(--primary);
  color: var(--primary);
}

.qr-input-group.hidden { display: none; }

.qr-options {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 20px 0;
}

.qr-option-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.qr-option-row:first-child {
  grid-template-columns: repeat(4, 1fr);
}

.qr-color-row {
  grid-template-columns: repeat(3, 1fr);
}

.qr-border-row {
  grid-template-columns: repeat(4, 1fr);
}

.qr-text-opts-row {
  grid-template-columns: repeat(4, 1fr);
}

.qr-text-group {
  margin-top: 8px;
}

.qr-text-group-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 8px;
}

.qr-text-group .qr-option-row:nth-child(2) {
  grid-template-columns: 2fr 1fr 1fr 1fr;
}

.qr-text-group .qr-option-row:nth-child(3) {
  grid-template-columns: 1fr 1fr 1fr;
}

.qr-text-divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

.qr-text-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
}

.qr-option {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.qr-option label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
}

.qr-option select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
}

.qr-color-picker {
  display: flex;
  align-items: center;
  gap: 8px;
}

.qr-color-picker input[type="color"] {
  width: 40px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  background: none;
  padding: 2px;
}

.qr-color-picker span {
  font-size: 13px;
  font-family: monospace;
  color: var(--text-2);
}

.qr-option-logo {
  width: 100%;
}

.qr-option-style {
  width: 100%;
}

.qr-border-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
}

.qr-border-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.qr-border-toggle label {
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
}

.qr-gradient-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
}

.qr-gradient-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.qr-gradient-toggle label {
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
}

.qr-option-style select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
}

.qr-logo-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.qr-logo-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.qr-logo-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.qr-logo-remove {
  padding: 4px 12px;
  border: none;
  border-radius: 6px;
  background: #ef4444;
  color: #fff;
  font-size: 12px;
  cursor: pointer;
}

#qr-logo-name {
  font-size: 13px;
  color: var(--text-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 120px;
}

.qr-preview {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.qr-preview canvas {
  /* border: 1px solid var(--border);
  border-radius: 18px; */
  max-width: 100%;
}

.qr-preview-empty {
  padding: 60px 20px;
  color: var(--text-3);
  font-size: 14px;
  text-align: center;
  border: 2px dashed var(--border);
  border-radius: 8px;
  width: 100%;
  max-width: 300px;
}

.qr-preview-empty.hidden { display: none; }
.qr-actions.hidden { display: none; }

.qr-decode-area {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.qr-decode-hint {
  font-size: 14px;
  color: var(--text-2);
  margin: 0 0 4px;
}

.qr-decode-buttons {
  display: flex;
  gap: 12px;
}

.qr-decode-paste-area {
  min-height: 120px;
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 12px;
  font-size: 14px;
  color: var(--text-3);
  outline: none;
  background: var(--bg-1);
}

.qr-decode-paste-area:empty::before {
  content: attr(data-placeholder);
  color: var(--text-3);
}

.qr-decode-paste-area.hidden { display: none; }

.qr-decode-result {
  margin-top: 16px;
}

.qr-decode-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.qr-decode-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
}

.qr-decode-text {
  width: 100%;
  min-height: 80px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--text-1);
  font-size: 14px;
  font-family: monospace;
  resize: vertical;
}

.qr-decode-error {
  padding: 12px 16px;
  border-radius: 8px;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  font-size: 14px;
  font-weight: 600;
}

@media (max-width: 768px) {
  .qr-section {
    padding: 16px;
  }
  .qr-option-row,
  .qr-option-row:first-child,
  .qr-border-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .qr-text-group .qr-option-row:nth-child(2) {
    grid-template-columns: repeat(2, 1fr);
  }
  .qr-text-group .qr-option-row:nth-child(3) {
    grid-template-columns: repeat(3, 1fr);
  }
  .qr-type-tabs {
    flex-wrap: wrap;
  }
  .qr-option select,
  .qr-text-input {
    font-size: 16px;
  }
  .qr-color-picker input[type="color"] {
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  .qr-section {
    padding: 12px;
  }
  .qr-option-row,
  .qr-option-row:first-child,
  .qr-color-row,
  .qr-border-row,
  .qr-text-group .qr-option-row:nth-child(2),
  .qr-text-group .qr-option-row:nth-child(3) {
    grid-template-columns: 1fr;
  }
}