.tool-content {
      max-width: 800px;
      margin: 0 auto;
      padding: var(--space-lg);
    }
.tool-header {
      text-align: center;
      margin-bottom: var(--space-lg);
    }
.mode-selector {
      display: flex;
      background: var(--border-color);
      padding: 4px;
      border-radius: 12px;
      margin-bottom: var(--space-md);
      gap: 4px;
    }
.mode-btn {
      flex: 1;
      border: none;
      background: transparent;
      padding: 10px;
      border-radius: 8px;
      cursor: pointer;
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-color);
      transition: all 0.2s;
    }
.mode-btn.active {
      background: var(--card-bg);
      color: var(--link-color);
      box-shadow: var(--shadow);
    }
.input-group {
      margin-bottom: var(--space-md);
    }
.label-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: var(--space-sm);
    }
.label-text {
      font-size: 0.85rem;
      font-weight: bold;
      color: var(--text-color);
      opacity: 0.6;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
.clear-btn {
      background: transparent;
      border: none;
      color: var(--link-color);
      font-size: 0.85rem;
      cursor: pointer;
      padding: 0;
    }
.clear-btn:hover {
      text-decoration: underline;
    }
textarea {
      width: 100%;
      height: 120px;
      padding: var(--space-md);
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      color: var(--text-color);
      font-family: var(--f-mono);
      font-size: 0.9rem;
      resize: vertical;
      outline: none;
      transition: border-color 0.2s;
    }
textarea:focus {
      border-color: var(--primary-color);
    }
.toggle-row {
      display: flex;
      justify-content: center;
      margin: -10px 0;
      position: relative;
      z-index: 2;
    }
.toggle-btn {
      background: var(--card-bg);
      border: 2px solid var(--link-color);
      color: var(--link-color);
      width: 44px;
      height: 44px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: var(--shadow);
      transition: transform 0.3s ease, background 0.2s;
    }
.toggle-btn:hover {
      background: var(--bg-color);
    }
.toggle-btn svg {
      width: 20px;
      height: 20px;
    }
.toggle-btn.rotating {
      transform: rotate(180deg);
    }
.output-area {
      position: relative;
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: var(--space-md);
      min-height: 80px;
      font-family: var(--f-mono);
      font-size: 0.9rem;
      word-break: break-all;
      color: var(--text-color);
      cursor: pointer;
      transition: all 0.2s;
    }
.output-area:hover {
      border-color: var(--link-color);
      background: var(--hover-bg); 
    }
.output-area:active {
      transform: scale(0.995);
    }
[data-theme="dark"] .output-area {
       background: var(--hover-bg);
       border-color: var(--hover-bg);
    }
[data-theme="light"] .output-area {
       background: var(--hover-bg);
       border-color: var(--line);
    }
.placeholder-text {
      color: var(--text-color);
      opacity: 0.4;
      font-style: italic;
    }
.copy-btn {
      position: absolute;
      bottom: 12px;
      right: 12px;
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      padding: 8px;
      border-radius: 8px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow);
      transition: all 0.2s;
      color: var(--text-color);
    }
.copy-btn:hover {
      border-color: var(--link-color);
      color: var(--link-color);
    }
.copy-btn:active {
      transform: scale(0.95);
    }
.copy-btn svg {
      width: 18px;
      height: 18px;
    }
#toast {
      position: fixed;
      bottom: 80px;
      left: 50%;
      transform: translateX(-50%) translateY(20px);
      background: var(--ink);
      color: var(--surface);
      padding: 10px 20px;
      border-radius: 20px;
      font-size: 0.9rem;
      opacity: 0;
      transition: all 0.3s;
      pointer-events: none;
      z-index: 1000;
    }
#toast.show {
      opacity: 1;
      transform: translateX(-50%) translateY(0);
    }