:root {
  color-scheme: light;
  --paper: #f4f2e9;
  --panel: #fcfbf6;
  --ink: #262b22;
  --muted: #5e6457;
  --line: #d6d8cb;
  --accent: #284c3c;
  --mono: "Cascadia Mono", Consolas, monospace;
  font: 15px/1.5 "Microsoft YaHei UI", "PingFang SC", sans-serif;
  color: var(--ink);
  background: var(--paper);
}
* { box-sizing: border-box; }
body { margin: 0; }
button, input, textarea, select { font: inherit; }
button, select, .download { cursor: pointer; }
button:disabled { cursor: wait; opacity: .72; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px clamp(20px, 5vw, 76px);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 5px;
  color: #fff;
  background: var(--accent);
  font-size: 19px;
}
.local { color: var(--muted); font-size: 12px; }
.topbar-actions { display: flex; align-items: center; gap: 16px; }
.local span { display: inline-block; width: 7px; height: 7px; margin-right: 5px; border-radius: 50%; background: #457455; }
main { max-width: 1440px; margin: auto; padding: 36px clamp(20px, 5vw, 76px) 44px; }
.intro { margin-bottom: 24px; }
.intro h1 {
  margin: 6px 0;
  font: 700 clamp(32px, 4vw, 49px)/1.2 "Songti SC", SimSun, serif;
  letter-spacing: -.04em;
}
.intro p { margin: 0; color: var(--muted); }
.intro .eyebrow { color: var(--accent); font: 12px var(--mono); letter-spacing: .12em; }
.workspace { display: grid; grid-template-columns: minmax(330px, 390px) minmax(0, 1fr); border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
form, .preview { padding: 22px; min-width: 0; }
form { border-right: 1px solid var(--line); }
.section-title, .label-row, .preview-header, .preview-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.section-title { justify-content: flex-start; }
.section-title span { color: var(--accent); font: 13px var(--mono); }
h2 { margin: 0; font-size: 17px; }
form .section-title { margin-bottom: 16px; }
.field { display: grid; gap: 5px; margin-bottom: 12px; }
label { font-size: 13px; font-weight: 700; }
input, textarea, select {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fff;
  color: var(--ink);
  padding: 8px 10px;
}
textarea { display: block; min-height: 96px; resize: vertical; }
#model-id { font-family: var(--mono); }
.field-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 9px; }
.text-button { background: none; border: 0; padding: 0; color: var(--accent); font-size: 12px; text-decoration: underline; text-underline-offset: 3px; }
small, .key-ready { font-size: 12px; color: var(--muted); }
.key-ready { margin-bottom: 12px; }
.generate {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 43px;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 5px;
  font-weight: 700;
  transition: background .18s ease;
}
.generate:not(:disabled):hover { background: #38654e; }
.generate:disabled span:first-child { animation: rotate 3s linear infinite; }
.cost { display: block; margin-top: 7px; }
#error { color: #8a271c; font-size: 13px; margin: 10px 0 0; overflow-wrap: anywhere; }
.preview { display: grid; grid-template-rows: auto 1fr auto; gap: 13px; }
.download { color: var(--accent); font-size: 13px; font-weight: 700; text-underline-offset: 4px; }
.canvas {
  display: grid;
  place-items: center;
  min-height: 390px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 5px;
  background-color: #e9ede3;
  background-image: radial-gradient(#b5c0b2 1px, transparent 1px);
  background-size: 16px 16px;
}
.empty { text-align: center; color: var(--accent); padding: 20px; }
.empty svg { display: block; width: 138px; margin: auto; }
.empty p { margin: 6px 0 0; padding: 4px 10px; background: #e9ede3; font-size: 13px; }
.canvas:has(img:not([hidden])) { background: #e3e8de; padding: 14px; }
.canvas img { display: block; max-width: 100%; max-height: min(65vh, 620px); object-fit: contain; animation: reveal .22s ease-out; }
.preview-footer { color: var(--muted); font-size: 12px; }
#metadata { text-align: right; font-family: var(--mono); }
.api-log, .history, .case-library { margin-top: 18px; padding: 22px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.case-filters { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 14px; }
.case-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); gap: 14px; align-items: start; }
.case-card { border: 1px solid var(--line); border-radius: 6px; overflow: hidden; background: var(--panel); }
.case-preview { position: relative; display: grid; place-items: center; aspect-ratio: 4 / 3; overflow: hidden; background: #e3e8de; }
.case-preview img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.case-body { display: grid; gap: 7px; padding: 13px; overflow-wrap: anywhere; }
.case-category { color: var(--accent); font-weight: 700; }
.case-body h3, .case-body p { margin: 0; }
.case-body h3 { font-size: 16px; }
.case-body p { color: var(--muted); font-size: 13px; }
.case-body summary { font-size: 13px; cursor: pointer; }
.case-body pre { max-height: 220px; overflow: auto; white-space: pre-wrap; font: 12px/1.5 var(--mono); background: var(--paper); padding: 8px; }
.case-actions, .case-pages { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.case-pages { justify-content: center; margin-top: 16px; font-size: 13px; }
.case-button { padding: 5px 9px; border: 1px solid var(--line); border-radius: 5px; background: var(--panel); color: var(--accent); font-size: 13px; }
.case-button:disabled { cursor: default; }
.case-import { border-color: var(--accent); background: var(--accent); color: #fff; }
.history-status, .history-meta { margin: 8px 0; color: var(--muted); font-size: 13px; overflow-wrap: anywhere; }
.history-list { list-style: none; padding: 0; margin: 0; max-height: 330px; overflow: auto; }
.history-list li { border-top: 1px solid var(--line); }
.history-list button {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  width: 100%;
  border: 0;
  background: none;
  color: var(--ink);
  padding: 9px 6px;
  text-align: left;
}
.history-list button:hover { background: var(--paper); }
.history-list button:focus-visible { outline-offset: -2px; }
.history-thumbnail {
  display: block;
  width: 64px;
  height: 56px;
  object-fit: contain;
  background: #e3e8de;
  border-radius: 4px;
}
.history-caption { display: grid; gap: 3px; overflow: hidden; }
.history-caption span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.history-caption small { overflow-wrap: anywhere; }
.history-dialog {
  width: min(720px, calc(100% - 32px));
  max-height: 90vh;
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--ink);
}
.history-dialog::backdrop { background: #262b2280; }
.history-image { display: grid; place-items: center; margin-bottom: 8px; background: #e3e8de; border-radius: 5px; }
.history-image img { display: block; max-width: 100%; max-height: 55vh; object-fit: contain; }
.history-prompt-heading { margin: 12px 0 5px; }
.history-prompt-heading h3 { margin: 0; font-size: 13px; }
.history-prompt-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 14px; }
#reuse-status:empty { display: none; }
.history-prompt { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.log-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.log-grid h3 { margin: 12px 0 5px; font-size: 13px; }
.log-grid pre {
  margin: 0;
  padding: 12px;
  min-height: 76px;
  max-height: 320px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--paper);
  font: 12px/1.6 var(--mono);
}
@keyframes rotate { to { transform: rotate(360deg); } }
@keyframes reveal { from { opacity: .4; } to { opacity: 1; } }
@media (max-width: 760px) {
  main { padding-top: 24px; }
  .workspace { grid-template-columns: minmax(0, 1fr); }
  form { border-right: 0; border-bottom: 1px solid var(--line); }
  .canvas { min-height: 300px; }
  .log-grid { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .case-filters { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .topbar-actions { gap: 10px; }
  .topbar-actions .local { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}