:root {
  color-scheme: light;
  --ink: #15232e;
  --muted: #65737d;
  --line: #dfe6e9;
  --surface: #ffffff;
  --ground: #f4f7f8;
  --accent: #087f8c;
  --accent-dark: #06636e;
  --danger: #a33a3a;
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--ground); color: var(--ink); }
.shell { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 30px 0 64px; }
.topbar, .dashboard-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); padding-bottom: 20px; }
.topbar { margin-bottom: 24px; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: clamp(24px, 4vw, 34px); letter-spacing: 0; }
h2 { font-size: 24px; letter-spacing: 0; }
h3 { font-size: 18px; letter-spacing: 0; }
.eyebrow { color: var(--accent-dark); font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 7px; }
.account, .status-dot, .state-label, .step { font-size: 12px; color: var(--muted); }
.account { background: #eaf4f4; color: var(--accent-dark); padding: 8px 10px; border: 1px solid #cce5e5; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 24px; }
.login-panel { max-width: 680px; margin: 56px auto 0; }
.panel-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 24px; }
.panel-heading.compact { margin-bottom: 18px; align-items: center; }
.step { border: 1px solid var(--line); padding: 5px 8px; color: var(--accent-dark); font-weight: 700; }
label { display: grid; gap: 7px; color: var(--muted); font-size: 13px; }
input, textarea { width: 100%; border: 1px solid #cdd7db; border-radius: 4px; background: #fff; padding: 11px 12px; color: var(--ink); font: inherit; outline: none; }
textarea { resize: vertical; min-height: 128px; }
input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px #d8efef; }
button { border: 1px solid transparent; border-radius: 4px; padding: 11px 15px; min-height: 42px; cursor: pointer; font: inherit; font-weight: 700; }
button:disabled { opacity: .55; cursor: wait; }
.primary { background: var(--accent); color: #fff; }
.primary:hover { background: var(--accent-dark); }
.quiet { border-color: var(--line); background: #fff; color: var(--ink); }
.quiet:hover { border-color: var(--accent); color: var(--accent-dark); }
.danger { border-color: #e4bcbc; background: #fff6f6; color: var(--danger); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr auto; gap: 14px; align-items: end; }
.stack-form, .stage { display: grid; gap: 16px; }
.inline-form { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: end; }
.captcha-box { min-height: 96px; border: 1px dashed #cdd7db; display: grid; place-items: center; background: #fbfcfc; }
.captcha-box img { max-width: 100%; image-rendering: auto; }
.stage { border-top: 1px solid var(--line); padding-top: 20px; margin-top: 20px; }
.stage-note, .message { color: var(--muted); font-size: 13px; line-height: 1.6; min-height: 21px; }
.message.error { color: var(--danger); }
.message.ok { color: var(--accent-dark); }
.dashboard-head { margin-bottom: 20px; }
.head-actions { display: flex; align-items: center; gap: 14px; }
.status-dot::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 6px; background: #aab6ba; border-radius: 50%; }
.status-dot.live::before { background: #2c9f72; }
.columns { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 20px; }
.two-up { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.preview-result { margin-top: 20px; border-top: 1px solid var(--line); padding-top: 15px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.catalog-panel { margin-bottom: 20px; }
.section-note { margin-top: 6px; color: var(--muted); font-size: 13px; }
.catalog-result { margin-top: 18px; border-top: 1px solid var(--line); max-height: 520px; overflow: auto; }
.catalog-course { padding: 14px 0; border-bottom: 1px solid var(--line); }
.catalog-title { display: flex; justify-content: space-between; gap: 12px; color: var(--ink); }
.catalog-title span { color: var(--muted); font-size: 12px; }
.catalog-classes { display: grid; gap: 8px; margin-top: 10px; }
.catalog-class { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 10px 12px; background: #f8fafb; color: var(--muted); font-size: 13px; }
.catalog-class strong { color: var(--ink); }
.catalog-class small { color: var(--accent-dark); }
.catalog-add { min-width: 84px; white-space: nowrap; }
.preview-item { border-bottom: 1px solid var(--line); padding: 8px 0; }
.task-panel { margin-top: 20px; }
.state-label { color: var(--accent-dark); }
.progress-track { height: 5px; background: #e8eef0; margin: 5px 0 14px; overflow: hidden; }
.progress-track span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .25s ease; }
.task-meta { color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.results { display: grid; gap: 8px; margin-bottom: 16px; }
.result-row { display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr); gap: 14px; padding: 10px 12px; background: #f8fafb; border-left: 3px solid #cdd7db; font-size: 13px; }
.result-row.success { border-left-color: #2c9f72; }
.result-row.failed { border-left-color: var(--danger); }
@media (max-width: 760px) {
  .shell { width: min(100% - 22px, 680px); padding-top: 18px; }
  .form-grid, .columns { grid-template-columns: 1fr; }
  .form-grid button { width: 100%; }
  .login-panel { margin-top: 28px; }
  .panel { padding: 18px; }
  .topbar, .dashboard-head { align-items: flex-start; }
  .dashboard-head { flex-direction: column; }
}