:root { --navy: #14213d; --coral: #e8603c; --grey: #f5f3f0; --teal: #1d7a6b; }
* { box-sizing: border-box; }
body { margin: 0; display: flex; min-height: 100vh; font-family: system-ui, sans-serif; color: var(--navy); background: #fff; }
.sidebar { width: 220px; padding: 1.5rem 1rem; background: var(--grey); display: flex; flex-direction: column; gap: .25rem; }
.sidebar a { padding: .6rem .75rem; border-radius: 6px; color: var(--navy); text-decoration: none; }
.sidebar a:hover, .sidebar a.active { background: #fff; font-weight: 600; }
.brand { margin-bottom: 1rem; }
main { flex: 1; padding: 1.5rem 2rem; max-width: 56rem; }
h1 { font-size: 2.2rem; line-height: 1.2; max-width: 22ch; }
label { display: block; margin: .5rem 0; font-size: .9rem; }
input, select, textarea { display: block; width: 100%; padding: .6rem; margin-top: .25rem; border: 1px solid #c9c5bf; border-radius: 6px; font: inherit; }
textarea { min-height: 6rem; }
button, #download { display: inline-block; padding: .6rem 1.2rem; border: 0; border-radius: 6px; background: var(--coral); color: #fff; font: inherit; cursor: pointer; text-decoration: none; }
:focus-visible { outline: 3px solid var(--navy); outline-offset: 2px; }
.row { display: flex; gap: 1rem; align-items: end; flex-wrap: wrap; }
.grow { flex: 1; }
.notice { background: var(--grey); padding: .6rem .9rem; border-radius: 6px; font-size: .85rem; }
.muted { color: #5b6477; }
.card { border: 1px solid #e3dfd9; border-radius: 8px; padding: 1rem; margin: .75rem 0; }
.card a { margin-right: 1rem; }
.ok { color: var(--teal); font-weight: 600; }
.err { color: #b3261e; font-weight: 600; }
figure { margin: 1rem 0; } img { max-width: 100%; max-height: 260px; }
@media (max-width: 700px) {
  body { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; padding: .5rem; }
  .brand { width: 100%; margin: 0; }
  main { padding: 1rem; }
}
.split { display: flex; gap: 1.5rem; align-items: flex-start; }
.split article { flex: 1; min-width: 0; }
#chat { width: 320px; position: sticky; top: 1rem; border: 1px solid #e3dfd9; border-radius: 8px; padding: 1rem; }
#chatLog { max-height: 320px; overflow-y: auto; }
.msg { margin: .5rem 0; }
@media (max-width: 900px) { .split { flex-direction: column; } #chat { width: 100%; position: static; } }