:root {
  --bg: #0f1115; --panel: #171a21; --line: #262b36; --text: #e7eaf0;
  --muted: #8a93a6; --accent: #7aa2f7; --ok: #9ece6a; --warn: #e0af68; --err: #f7768e;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--err); min-height: 1.2em; }
.spacer { flex: 1; }

/* login */
.login { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 32px; width: 320px; display: flex; flex-direction: column; gap: 14px;
}
.login-card h1 { margin: 0; font-size: 28px; letter-spacing: 2px; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }

input, select, textarea, button {
  background: #10131a; color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 9px 12px; font-size: 14px;
}
textarea { resize: vertical; min-height: 84px; }
button { cursor: pointer; background: var(--accent); color: #0d1017; border: none; font-weight: 600; }
button:hover { filter: brightness(1.08); }
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); }
button.danger { background: transparent; color: var(--err); border: 1px solid var(--line); padding: 4px 10px; font-size: 12px; }

/* app layout */
.app { max-width: 1080px; margin: 0 auto; padding: 0 20px 60px; }
header { display: flex; align-items: center; gap: 14px; padding: 18px 0; }
.logo { font-weight: 700; font-size: 20px; letter-spacing: 2px; }
.pill {
  font-size: 12px; padding: 3px 10px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted);
}
.pill.online { color: var(--ok); border-color: var(--ok); }
.pill.offline { color: var(--err); border-color: var(--err); }
.pill.h3 { color: var(--warn); border-color: var(--warn); }
main { display: grid; grid-template-columns: 5fr 6fr; gap: 20px; align-items: start; }
@media (max-width: 900px) { main { grid-template-columns: 1fr; } }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.panel h2 { margin: 0 0 14px; font-size: 16px; }

/* tabs */
.tabs { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.tabs button { background: transparent; color: var(--muted); border: 1px solid var(--line); padding: 6px 14px; }
.tabs button.active { color: #0d1017; background: var(--accent); border-color: var(--accent); }

/* form */
.task-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.task-form .full { grid-column: 1 / -1; }
.task-form label { display: flex; flex-direction: column; gap: 5px; font-size: 12.5px; color: var(--muted); }
.submit-row { display: flex; align-items: center; gap: 14px; margin-top: 16px; }
.submit-row button { padding: 10px 26px; }

/* tasks */
.tasks { display: flex; flex-direction: column; gap: 12px; max-height: 76vh; overflow-y: auto; }
.task { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.task .row { display: flex; align-items: center; gap: 10px; }
.task .cap { font-weight: 600; }
.task .id { color: var(--muted); font-size: 12px; }
.task .when { margin-left: auto; color: var(--muted); font-size: 12px; }
.status { font-size: 12px; padding: 2px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.status.done { color: var(--ok); border-color: var(--ok); }
.status.failed, .status.canceled { color: var(--err); border-color: var(--err); }
.status.running, .status.uploading, .status.queued { color: var(--warn); border-color: var(--warn); }
.progress { height: 5px; border-radius: 4px; background: #10131a; margin: 9px 0; overflow: hidden; }
.progress > i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .6s; }
.task .prompt { color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.task .error-text { color: var(--err); font-size: 12.5px; margin: 6px 0 0; word-break: break-all; }
.task .files { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.task .files a { color: var(--accent); font-size: 13px; text-decoration: none; border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px; }
.task img.preview, .task video.preview { max-width: 100%; border-radius: 8px; margin-top: 10px; }
.task audio { width: 100%; margin-top: 10px; }