:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1f232c;
  --border: #2a2f3a;
  --text: #e6e8ee;
  --muted: #8b94a7;
  --accent: #7c5cff;
  --accent-2: #5b8bff;
  --error: #ff6b6b;
  --ok: #58cc8b;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font: 14px/1.5 -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft Yahei", sans-serif; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--error); margin-top: 8px; min-height: 1em; }
.status { margin: 8px 0; min-height: 1.2em; }

/* Login */
body { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
#view-main { display: none; min-height: 100vh; flex-direction: column; }
#view-main:not(.hidden) { display: flex; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
.login-card { width: min(360px, 92vw); }
.login-card h1 { margin: 0 0 4px; font-size: 28px; letter-spacing: 0.5px; }
.login-card p { margin: 0 0 16px; }
form label { display: block; margin: 12px 0; color: var(--muted); }
form input, form textarea, form select {
  display: block; width: 100%; margin-top: 6px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); padding: 10px 12px; font: inherit;
}
form input:focus, form textarea:focus, form select:focus { outline: none; border-color: var(--accent); }
button {
  background: var(--accent); color: white; border: 0; border-radius: 8px;
  padding: 10px 16px; cursor: pointer; font: inherit; font-weight: 600;
}
button:hover { filter: brightness(1.1); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }

/* Main layout */
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; font-size: 18px; letter-spacing: 0.5px; }
.user { display: flex; align-items: center; gap: 12px; }
.tabs { display: flex; gap: 8px; padding: 12px 24px; border-bottom: 1px solid var(--border); }
.tab { background: transparent; border: 1px solid transparent; color: var(--muted); padding: 6px 14px; border-radius: 8px; }
.tab.active { color: var(--text); border-color: var(--border); background: var(--panel-2); }
.tab-panel { padding: 24px; max-width: 880px; width: 100%; margin: 0 auto; }
.tab-panel .card label { display: block; margin: 12px 0; color: var(--muted); }
.tab-panel textarea, .tab-panel select { width: 100%; }
.row { display: flex; gap: 12px; align-items: end; flex-wrap: wrap; }
.row > * { flex: 0 0 auto; }
.row > button { margin-left: auto; }
.row.between { justify-content: space-between; align-items: center; }
.result { margin-top: 16px; }
.result img, .result video { max-width: 100%; border-radius: 8px; border: 1px solid var(--border); }
.history { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-top: 12px; }
.history .item { background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 8px; }
.history .item img, .history .item video { width: 100%; border-radius: 4px; }
.history .item .meta { font-size: 12px; color: var(--muted); margin-top: 6px; word-break: break-all; }

/* small helper */
.small { font-size: 12px; }
.grow { flex: 1 1 auto; }
.badge { background: var(--panel-2); border: 1px solid var(--border); border-radius: 999px; padding: 2px 10px; font-size: 12px; color: var(--muted); }
button.danger { color: var(--error); border-color: var(--error); }
input[type="number"] { width: 80px; }

/* model selector row */
.model-row { align-items: center; }
.model-row label { margin: 0; }
.model-row select { margin-top: 6px; }

/* settings: connections */
.conn-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; margin-top: 16px; }
.conn-card { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.conn-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }

/* modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 16px; }
.modal-box { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 24px; width: min(560px, 96vw); max-height: 90vh; overflow-y: auto; }
.modal-box h3, .modal-box h4 { margin: 0 0 12px; }
.modal-box label { display: block; margin: 12px 0; color: var(--muted); }
.modal-box input, .modal-box select, .modal-box textarea { display: block; width: 100%; margin-top: 6px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); padding: 10px 12px; font: inherit; }
.modal-box input:focus, .modal-box select:focus, .modal-box textarea:focus { outline: none; border-color: var(--accent); }
.conn-models { display: flex; flex-direction: column; gap: 8px; }
.model-edit-row { display: grid; grid-template-columns: 1.2fr 1.2fr 0.8fr auto; gap: 8px; align-items: center; }
.model-edit-row input, .model-edit-row select { margin-top: 0; padding: 8px 10px; }

/* chat */
.chat-card { display: flex; flex-direction: column; gap: 12px; }
.chat-log { display: flex; flex-direction: column; gap: 10px; max-height: 52vh; overflow-y: auto; padding: 8px 4px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); }
.msg { display: flex; }
.msg.me { justify-content: flex-end; }
.msg.ai { justify-content: flex-start; }
.bubble { max-width: 80%; padding: 10px 12px; border-radius: 10px; white-space: pre-wrap; word-break: break-word; }
.msg.me .bubble { background: var(--accent); color: white; }
.msg.ai .bubble { background: var(--panel); border: 1px solid var(--border); }
.chat-input-row { align-items: stretch; }
.chat-input-row textarea { margin-top: 0; resize: vertical; }
.chat-snippet { font-size: 12px; color: var(--muted); white-space: pre-wrap; word-break: break-word; max-height: 80px; overflow: hidden; }