feat: add task creation board

frontend/src/styles.css

@@ -8,7 +8,7 @@ body {
   margin: 0;
 }
 
-main {
+.panel {
   max-width: 40rem;
   margin: 6rem auto;
   padding: 2rem;
@@ -22,7 +22,8 @@ h1 {
 }
 
 button,
-input {
+input,
+textarea {
   font: inherit;
 }
 
@@ -36,7 +37,8 @@ button {
 }
 
 button:disabled,
-input:disabled {
+input:disabled,
+textarea:disabled {
   cursor: not-allowed;
   opacity: 0.65;
 }
@@ -68,6 +70,168 @@ input {
   border-radius: 0.4rem;
 }
 
+textarea {
+  box-sizing: border-box;
+  width: 100%;
+  padding: 0.6rem;
+  border: 1px solid #9ca3af;
+  border-radius: 0.4rem;
+  resize: vertical;
+}
+
 .error {
+  margin: 0;
   color: #b91c1c;
 }
+
+.task-app {
+  min-height: 100vh;
+  padding: 2rem clamp(1rem, 4vw, 4rem);
+  background: #f3f4f6;
+}
+
+.app-header,
+.board-toolbar,
+.user-controls,
+.modal-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+}
+
+.app-header {
+  margin: 0 auto 2rem;
+  max-width: 90rem;
+}
+
+.app-header h1,
+.eyebrow {
+  margin: 0;
+}
+
+.eyebrow {
+  color: #64748b;
+  font-weight: 600;
+}
+
+.user-controls {
+  justify-content: flex-end;
+}
+
+.compact {
+  margin-top: 0;
+}
+
+.board-toolbar {
+  min-height: 2.75rem;
+  margin: 0 auto 1rem;
+  max-width: 90rem;
+}
+
+.link-button {
+  padding: 0.25rem 0.5rem;
+  color: #2563eb;
+  background: transparent;
+  text-decoration: underline;
+}
+
+.board {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 1rem;
+  margin: 0 auto;
+  max-width: 90rem;
+}
+
+.board-column {
+  min-height: 20rem;
+  padding: 1rem;
+  border-radius: 0.75rem;
+  background: #e5e7eb;
+}
+
+.board-column h2 {
+  margin: 0 0 1rem;
+  font-size: 1.1rem;
+}
+
+.task-list {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.task-card {
+  padding: 1rem;
+  border-radius: 0.5rem;
+  background: white;
+  box-shadow: 0 0.125rem 0.4rem rgb(0 0 0 / 8%);
+}
+
+.task-card h3,
+.task-card p {
+  margin: 0;
+}
+
+.task-card p {
+  margin-top: 0.5rem;
+  color: #475569;
+  white-space: pre-wrap;
+}
+
+.modal-backdrop {
+  position: fixed;
+  inset: 0;
+  display: grid;
+  place-items: center;
+  padding: 1rem;
+  background: rgb(15 23 42 / 55%);
+}
+
+.modal {
+  width: min(100%, 34rem);
+  padding: 1.5rem;
+  border-radius: 0.75rem;
+  background: white;
+  box-shadow: 0 1rem 3rem rgb(0 0 0 / 25%);
+}
+
+.modal-header {
+  margin-bottom: 1.25rem;
+}
+
+.modal-header h2 {
+  margin: 0;
+}
+
+.close-button {
+  padding: 0.2rem 0.55rem;
+  color: #475569;
+  background: transparent;
+  font-size: 1.75rem;
+  line-height: 1;
+}
+
+@media (max-width: 48rem) {
+  .panel {
+    margin: 2rem 1rem;
+  }
+
+  .app-header {
+    align-items: flex-start;
+  }
+
+  .user-controls {
+    flex-direction: column;
+    align-items: flex-end;
+  }
+
+  .board {
+    grid-template-columns: 1fr;
+  }
+
+  .board-column {
+    min-height: 8rem;
+  }
+}