feat: unify tool styles and add dynamic height for textareas

src/styles/tools.css

@@ -0,0 +1,107 @@
+/* Shared styles for all tools */
+
+.tool-container {
+  display: flex;
+  justify-content: center;
+  width: 100%;
+  max-width: 800px;
+  margin: 0 auto;
+  height: 100%;
+  padding: 1rem;
+}
+
+.tool-panel {
+  width: 100%;
+  padding: 2rem;
+  border-radius: 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 1.5rem;
+  max-height: 100%;
+  overflow-y: auto;
+  background: var(--glass-bg);
+  backdrop-filter: blur(12px);
+  -webkit-backdrop-filter: blur(12px);
+  border: 1px solid var(--glass-border);
+  box-shadow: var(--glass-shadow);
+}
+
+/* Custom scrollbar for tool panel */
+.tool-panel::-webkit-scrollbar {
+  width: 8px;
+}
+
+.tool-panel::-webkit-scrollbar-track {
+  background: rgba(0, 0, 0, 0.1);
+  border-radius: 4px;
+}
+
+.tool-panel::-webkit-scrollbar-thumb {
+  background: rgba(255, 255, 255, 0.2);
+  border-radius: 4px;
+}
+
+.tool-panel::-webkit-scrollbar-thumb:hover {
+  background: rgba(255, 255, 255, 0.3);
+}
+
+.tool-title {
+  margin: 0;
+  text-align: center;
+  font-size: 1.5rem;
+  font-weight: 600;
+  background: var(--title-gradient);
+  -webkit-background-clip: text;
+  background-clip: text;
+  color: transparent;
+  -webkit-text-fill-color: transparent;
+  filter: drop-shadow(0 0 10px var(--title-glow));
+}
+
+:root[data-theme="light"] .tool-title {
+  background: none;
+  -webkit-background-clip: unset;
+  background-clip: unset;
+  color: #000000;
+  -webkit-text-fill-color: #000000;
+  filter: none;
+}
+
+.tool-textarea {
+  width: 100%;
+  height: 100%;
+  padding: 1rem;
+  background-color: rgba(0, 0, 0, 0.2);
+  border: 1px solid var(--toggle-border);
+  border-radius: 12px;
+  color: #ffffff; /* Explicit white color for dark mode */
+  font-family: monospace;
+  font-size: 1rem;
+  line-height: 1.6;
+  resize: none;
+  transition: all 0.3s ease;
+  box-sizing: border-box;
+}
+
+:root[data-theme="light"] .tool-textarea {
+  color: #000000;
+}
+
+.tool-textarea:focus {
+  outline: none;
+  border-color: #00f2fe; /* Force cyan accent */
+  box-shadow: 0 0 0 1px #00f2fe;
+}
+
+.result-area {
+  display: flex;
+  flex-direction: column;
+  flex: 1;
+  min-height: 200px;
+}
+
+.result-area label {
+  margin-bottom: 0.5rem;
+  font-weight: 600;
+  color: var(--text-secondary);
+}