:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-2: #fafbfc;
  --text: #1b1f24;
  --muted: #6b7280;
  --muted-2: #9aa1ab;
  --border: #e6e8ec;
  --border-2: #eef0f3;
  --primary: #5457d6;
  --primary-2: #7c5cf0;
  --primary-soft: #eef0ff;
  --success: #159c5b;
  --success-soft: #e7f7ef;
  --danger: #d33a3a;
  --danger-soft: #fdeaea;
  --warn: #b8860b;
  --warn-soft: #fdf6e3;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16,24,40,.05), 0 6px 20px rgba(16,24,40,.05);
  --shadow-sm: 0 1px 2px rgba(16,24,40,.06);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.app { display: flex; height: 100vh; overflow: hidden; }

/* ============ 侧边栏 ============ */
.sidebar {
  width: 288px; flex: 0 0 288px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 18px 16px;
  gap: 16px;
  overflow: hidden;
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand-logo {
  width: 38px; height: 38px; border-radius: 11px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; font-weight: 700; font-size: 19px;
  display: grid; place-items: center;
  box-shadow: 0 4px 12px rgba(84,87,214,.28);
}
.brand-title { font-weight: 650; font-size: 15px; letter-spacing: .2px; }
.brand-sub { font-size: 11.5px; color: var(--muted-2); margin-top: 2px; }

.usage-card {
  background: var(--panel-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 13px 14px;
}
.usage-head { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--muted); }
.badge {
  font-size: 11px; padding: 2px 8px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary); font-weight: 600;
}
.usage-num { font-size: 26px; font-weight: 700; margin: 8px 0 9px; letter-spacing: -.5px; }
.usage-num small { font-size: 12px; color: var(--muted-2); font-weight: 500; }
.usage-bar { height: 6px; border-radius: 99px; background: #e9ebf0; overflow: hidden; }
.usage-bar-fill { height: 100%; width: 0; border-radius: 99px; background: linear-gradient(90deg, var(--primary), var(--primary-2)); transition: width .5s ease; }
.usage-meta { display: flex; justify-content: space-between; font-size: 11.5px; color: var(--muted-2); margin-top: 8px; }

.side-section { display: flex; flex-direction: column; min-height: 0; }
.side-section.side-grow { flex: 1; min-height: 120px; }
.side-title { font-size: 11.5px; font-weight: 650; color: var(--muted-2); text-transform: uppercase; letter-spacing: .6px; margin-bottom: 9px; }

.model-list { display: flex; flex-direction: column; gap: 6px; }
.model-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: 9px;
  background: var(--panel-2); border: 1px solid var(--border-2);
  font-size: 12px;
}
.model-item .mi-kind { font-size: 13px; }
.model-item .mi-name { font-weight: 600; }
.model-item .mi-desc { color: var(--muted-2); font-size: 11px; margin-left: auto; text-align: right; max-width: 130px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.history-list { overflow-y: auto; display: flex; flex-direction: column; gap: 6px; padding-right: 3px; }
.history-item {
  padding: 8px 10px; border-radius: 9px; background: var(--panel-2);
  border: 1px solid var(--border-2); cursor: pointer; transition: .15s;
}
.history-item:hover { border-color: #d9dce4; background: #fff; }
.history-item .hi-top { display: flex; align-items: center; gap: 6px; font-size: 11.5px; }
.history-item .hi-prompt { font-size: 12px; margin-top: 4px; color: #454b55; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.history-empty { font-size: 12px; color: var(--muted-2); padding: 10px 2px; }

.pill { font-size: 10.5px; padding: 1.5px 7px; border-radius: 99px; font-weight: 600; }
.pill-image { background: #eef0ff; color: #5457d6; }
.pill-video { background: #fdeadf; color: #c2571a; }
.pill-succeeded { background: var(--success-soft); color: var(--success); }
.pill-failed { background: var(--danger-soft); color: var(--danger); }
.pill-running { background: var(--warn-soft); color: var(--warn); }

.side-foot { display: flex; align-items: center; gap: 7px; font-size: 11.5px; color: var(--muted-2); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: #c9ced6; }
.dot.on { background: var(--success); box-shadow: 0 0 0 3px var(--success-soft); }
.dot.off { background: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }

/* ============ 主区 ============ */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar {
  height: 60px; flex: 0 0 60px;
  display: flex; align-items: center; gap: 12px;
  padding: 0 22px; background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.topbar-title { font-weight: 650; font-size: 15px; }
.topbar-sub { font-size: 12.5px; color: var(--muted-2); }

.chat { flex: 1; overflow-y: auto; padding: 24px 22px 10px; scroll-behavior: smooth; }
.chat-inner { max-width: 860px; margin: 0 auto; }

.welcome { max-width: 640px; margin: 6vh auto 0; text-align: center; }
.welcome h1 { font-size: 24px; margin: 0 0 10px; letter-spacing: -.3px; }
.welcome p { color: var(--muted); font-size: 13.5px; line-height: 1.7; margin: 0 0 22px; }
.starters { display: flex; flex-wrap: wrap; gap: 9px; justify-content: center; }
.starter {
  border: 1px solid var(--border); background: var(--panel);
  padding: 9px 14px; border-radius: 10px; font-size: 12.5px;
  cursor: pointer; color: #3a4048; transition: .15s; font-family: inherit;
  box-shadow: var(--shadow-sm);
}
.starter:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }

.msg { display: flex; gap: 11px; margin-bottom: 20px; animation: rise .28s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.msg .avatar {
  width: 30px; height: 30px; flex: 0 0 30px; border-radius: 9px;
  display: grid; place-items: center; font-size: 14px; margin-top: 2px;
}
.msg.user { flex-direction: row-reverse; }
.msg.user .avatar { background: #eceef3; color: #5a6068; }
.msg.assistant .avatar { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; }
.msg .body { max-width: 100%; min-width: 0; }
.msg .bubble {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 11px 14px; font-size: 13.5px;
  line-height: 1.65; white-space: pre-wrap; word-break: break-word;
  box-shadow: var(--shadow-sm);
}
.msg.user .bubble { background: var(--primary); color: #fff; border-color: var(--primary); }
.msg .bubble b { font-weight: 650; }

/* 任务卡片 */
.job-card {
  margin-top: 10px; background: var(--panel);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; box-shadow: var(--shadow-sm); max-width: 620px;
}
.job-head { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.job-prompt { font-size: 13px; color: #343a42; flex: 1; overflow: hidden; text-overflow: ellipsis; }
.job-params { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.param-chip {
  font-size: 11.5px; padding: 3px 9px; border-radius: 7px;
  background: var(--panel-2); border: 1px solid var(--border-2); color: #4c525b;
}
.job-progress { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.progress-bar { flex: 1; height: 6px; border-radius: 99px; background: #eceef2; overflow: hidden; }
.progress-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--primary), var(--primary-2)); border-radius: 99px; transition: width .45s ease; }
.progress-fill.done { background: linear-gradient(90deg, #17b268, #3ecf8e); }
.progress-fill.err { background: linear-gradient(90deg, #e05252, #f08a8a); }
.progress-text { font-size: 12px; color: var(--muted); min-width: 108px; text-align: right; }
.job-points { font-size: 12px; color: var(--muted-2); margin-bottom: 10px; }
.job-points b { color: var(--primary); font-weight: 650; }

.job-result { margin-top: 4px; }
.job-result img, .job-result video {
  width: 100%; border-radius: 10px; border: 1px solid var(--border); background: #0f1115; display: block;
}
.result-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.job-actions { display: flex; gap: 8px; margin-top: 10px; }
.btn {
  font-family: inherit; font-size: 12.5px; padding: 7px 13px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--panel); color: #3a4048;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 5px;
}
.btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: #4a4dc4; color: #fff; }

.job-error {
  font-size: 12.5px; color: var(--danger); background: var(--danger-soft);
  border: 1px solid #f7cccc; border-radius: 9px; padding: 9px 12px; line-height: 1.6; word-break: break-word;
}
.spinner {
  width: 13px; height: 13px; border: 2px solid #d8dbe5; border-top-color: var(--primary);
  border-radius: 50%; animation: spin .7s linear infinite; display: inline-block; vertical-align: -2px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 输入区 */
.composer { flex: 0 0 auto; padding: 12px 22px 16px; background: linear-gradient(180deg, rgba(244,245,247,0), var(--bg) 30%); }
.composer-inner {
  max-width: 860px; margin: 0 auto;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 8px 8px 8px 10px;
  display: flex; flex-direction: column; gap: 8px;
  box-shadow: var(--shadow);
  transition: border-color .15s, background .15s;
}
.composer-inner:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft), var(--shadow); }
.composer-inner.dragover { border-color: var(--primary); background: var(--primary-soft); }
.input-row { display: flex; align-items: flex-end; gap: 8px; }
.attach-btn {
  flex: 0 0 auto; width: 34px; height: 34px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--panel-2); color: #5a6068;
  display: grid; place-items: center; cursor: pointer; transition: .15s;
}
.attach-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }

.thumbs { display: flex; flex-wrap: wrap; gap: 8px; padding: 2px 2px 0; }
.thumbs:empty { display: none; }
.thumb {
  position: relative; width: 62px; height: 62px; border-radius: 9px;
  border: 1px solid var(--border); overflow: hidden; background: #f2f3f6;
}
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb .thumb-x {
  position: absolute; top: 2px; right: 2px; width: 17px; height: 17px;
  border-radius: 50%; background: rgba(20,22,28,.6); color: #fff;
  border: none; font-size: 11px; line-height: 17px; cursor: pointer; padding: 0;
}
.thumb .thumb-x:hover { background: rgba(20,22,28,.85); }
.thumb .thumb-state {
  position: absolute; inset: 0; display: grid; place-items: center;
  background: rgba(255,255,255,.74); font-size: 11px; color: #5a6068;
  text-align: center; padding: 4px; line-height: 1.3;
}
.thumb.err { border-color: #efb3b3; }
.thumb.err .thumb-state { background: var(--danger-soft); color: var(--danger); }

.msg .bubble .msg-thumbs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.msg .bubble .msg-thumbs img {
  width: 68px; height: 68px; object-fit: cover; border-radius: 8px;
  border: 1px solid rgba(255,255,255,.45); background: #eef0f4;
}
#input {
  flex: 1; border: none; outline: none; resize: none;
  font-family: inherit; font-size: 13.5px; line-height: 1.6;
  max-height: 140px; padding: 6px 0; background: transparent; color: var(--text);
}
#input::placeholder { color: var(--muted-2); }
.send-btn {
  flex: 0 0 auto; width: 38px; height: 38px; border-radius: 10px;
  border: none; background: var(--primary); color: #fff; cursor: pointer;
  display: grid; place-items: center; transition: .15s;
}
.send-btn:hover { background: #4a4dc4; }
.send-btn:disabled { background: #c8cbd6; cursor: not-allowed; }
.composer-hint { max-width: 860px; margin: 8px auto 0; font-size: 11px; color: var(--muted-2); text-align: center; }

/* 灯箱 */
.lightbox {
  position: fixed; inset: 0; background: rgba(12,14,18,.82);
  display: none; align-items: center; justify-content: center; z-index: 100; padding: 40px; cursor: zoom-out;
}
.lightbox.show { display: flex; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 10px; }

.only-mobile { display: none; }

/* 响应式 */
@media (max-width: 900px) {
  .only-mobile { display: grid; }
  .sidebar {
    position: fixed; top: 0; bottom: 0; left: 0; z-index: 60;
    transform: translateX(-100%); transition: transform .25s ease; box-shadow: var(--shadow);
  }
  .sidebar.open { transform: none; }
  .chat { padding: 18px 14px 6px; }
  .composer { padding: 10px 14px 14px; }
}
.icon-btn {
  width: 34px; height: 34px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--panel); cursor: pointer; place-items: center; font-size: 15px; color: #4a5058;
}