Frontend style refactoring

wwwroot/css/base.css

@@ -1,9 +1,15 @@
-* { margin: 0; padding: 0; box-sizing: border-box; }
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
 
 body {
   background: var(--f2-bg);
   color: var(--text);
   height: 100vh;
+  display: flex;
+  flex-direction: column;
 }
 
 body, input, select, button, textarea {
@@ -31,163 +37,24 @@ button, select, input, textarea {
   outline: none;
 }
 
-button:hover, select:hover, input:hover, textarea:hover {
+button {
+  line-height: 1.25;
+  padding: var(--s2) var(--s3);
+}
+
+button:not(:disabled) {
+  cursor: pointer;
+}
+
+button:not(:disabled):hover, select:hover, input:hover, textarea:hover {
   border-color: var(--primary);
 }
 
-button {
-  cursor: pointer;
-  line-height: 1.25;
-  padding: var(--s2) var(--s3);
+button:disabled {
+  opacity: .5;
 }
 
 textarea {
   height: 8em;
   min-height: 8em;
 }
-
-.toggle {
-  display: flex;
-  align-items: center;
-  gap: var(--s2);
-  margin-left: auto;
-}
-
-.toggle label {
-  cursor: pointer;
-}
-
-.session-rename {
-  background: var(--f2-bg);
-  border: var(--border-width) solid var(--f2-border);
-  outline: none;
-}
-
-/* ── Header ── */
-
-header {
-  padding: var(--s4) calc(var(--s4) * 2);
-  border-bottom: var(--border-width) solid var(--f1-border);
-  display: flex;
-  align-items: center;
-  gap: var(--s4);
-  flex-shrink: 0;
-}
-
-/* ── System Prompt ── */
-
-#systemPrompt {
-  display: none;
-  width: calc(100% - calc(var(--s4) * 2));
-  margin: var(--s4);
-  padding: var(--s4);
-}
-
-#systemPrompt.visible { display: block; }
-
-/* ── Meta Bar ── */
-
-.meta-bar {
-  padding: var(--s2);
-  background: var(--f1-bg);
-  border-bottom: var(--border-width) solid var(--f1-border);
-  flex-shrink: 0;
-  min-height: 2.5em;
-}
-
-/* ── Chat ── */
-
-#chat {
-  flex: 1;
-  overflow-y: auto;
-  padding: var(--s4);
-  display: flex;
-  flex-direction: column;
-  gap: var(--s4);
-}
-
-.msg {
-  padding: var(--s3) var(--s4);
-  white-space: pre-wrap;
-  word-break: break-word;
-}
-
-.msg.user {
-  align-self: flex-end;
-  background: var(--f3-bg);
-  border: var(--border-width) solid var(--f3-border);
-}
-
-.msg.assistant {
-  align-self: flex-start;
-  background: var(--f1-bg);
-  border: var(--border-width) solid var(--f1-border);
-}
-
-.msg.system-info {
-  align-self: center;
-  border: var(--border-width) solid var(--f2-border);
-  text-align: center;
-  padding: var(--s2);
-}
-
-/* ── Cursor ── */
-
-.msg .cursor {
-  display: inline-block;
-  width: .125em;
-  height: 1em;
-  background: var(--text);
-  animation: blink 0.8s infinite;
-  vertical-align: text-bottom;
-  margin-left: .125em;
-}
-
-@keyframes blink {
-  0%, 50% { opacity: 1; }
-  51%, 100% { opacity: 0; }
-}
-
-/* ── Tool Boxes ── */
-
-.tool-box {
-  align-self: center;
-  padding: var(--s2);
-  background: var(--f3-bg);
-  border: var(--border-width) solid var(--f3-border);
-}
-
-/* ── Input Area ── */
-
-.input-area {
-  border-top: var(--border-width) solid var(--f1-border);
-  display: flex;
-  flex-shrink: 0;
-  gap: var(--s4);
-  padding: var(--s4);
-}
-
-.input-area textarea {
-  flex: 1;
-}
-
-.input-area button {
-  align-self: flex-end;
-}
-
-.input-area button:disabled { opacity: 0.5; cursor: not-allowed; }
-
-/* ── Archive ── */
-
-.archive-container {
-  display: flex;
-  flex-direction: column;
-  gap: var(--s4);
-}
-
-.archived { opacity: 0.6; }
-
-.archive-load-btn {
-  display: block;
-  margin-inline: auto;
-}