/* 布局：桌面左侧是装裱好的作品预览，右侧是面板；手机上作品在上、面板在下。
   面板从上到下：常用的落款和分享下载、AI、折叠起来的细调。
   单一深色观感：砚台黑底衬宣纸，朱砂红只用在主按钮和印章上。 */
:root {
  --inkstone: #1b1c1d;
  --panel: #232426;
  --line: #36383c;
  --silk: #5f6f78;
  --silk-edge: #b7a77f;
  --paper: #f2eee4;
  --text: #e7e3da;
  --muted: #a19c93;
  --cinnabar: #b8322a;
  --cinnabar-hi: #cc463b;
  --font-brush: "Liu Jian Mao Cao", "STXingkai", "华文行楷", cursive;
  --font-body: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-ui: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { background: var(--inkstone); color: var(--text); }
body {
  margin: 0; font-family: var(--font-ui); font-size: 15px; line-height: 1.7;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

.top { max-width: 1180px; margin: 0 auto; padding-block: 20px 8px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 18px; }
.brand { display: flex; align-items: baseline; gap: 8px; }
.brand-zh { font-family: var(--font-brush); font-size: 40px; line-height: 1; letter-spacing: .04em; }
.brand-en { font-size: 13px; letter-spacing: .2em; color: var(--muted); }
.tag { margin: 0; color: var(--muted); font-family: var(--font-body); }
.gh { margin-left: auto; color: var(--muted); font-size: 13px; }
.gh:hover { color: var(--text); }

.studio { max-width: 1180px; margin: 0 auto; padding-block: 12px 32px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 380px); gap: 32px; align-items: start; }

.mount { margin: 0; justify-self: center; position: relative; background: var(--silk); padding: 18px; box-shadow: 0 18px 50px rgba(0, 0, 0, .55); max-width: 100%; }
.mount::before { content: ""; position: absolute; inset: 10px; border: 1px solid var(--silk-edge); pointer-events: none; }
.mount canvas { display: block; position: relative; max-width: 100%; max-height: min(78vh, 900px); width: auto; height: auto; }
.status { position: absolute; left: 50%; bottom: 28px; transform: translateX(-50%); background: rgba(27, 28, 29, .82); color: var(--text); font-size: 13px; padding: 4px 12px; border-radius: 3px; white-space: nowrap; }

.panel { min-width: 0; display: grid; gap: 22px; }
h2 { font-size: 14px; font-weight: 600; letter-spacing: .15em; color: var(--silk-edge); margin: 0 0 8px; }
label, legend { display: block; font-size: 13px; color: var(--muted); margin: 0 0 4px; letter-spacing: .05em; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.quick { display: grid; gap: 10px; }
#msg:empty { display: none; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.row2 > div { min-width: 0; }
input, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--panel);
  border: 1px solid var(--line); border-radius: 3px; padding: 7px 10px;
}
textarea { resize: vertical; font-family: var(--font-body); font-size: 16px; }
input:focus, textarea:focus { outline: 2px solid var(--silk-edge); outline-offset: 0; border-color: transparent; }
input[type="range"] { padding: 0; height: 34px; background: none; border: 0; accent-color: var(--cinnabar); }
output { color: var(--text); font-variant-numeric: tabular-nums; }

.fmt { border: 0; padding: 0; margin: 0; display: flex; gap: 8px; flex-wrap: wrap; }
.fmt legend { width: 100%; }
.fmt label { margin: 0; }
.fmt input { position: absolute; opacity: 0; width: 1px; }
.fmt span { display: inline-block; padding: 5px 16px; border: 1px solid var(--line); border-radius: 3px; color: var(--text); cursor: pointer; font-size: 14px; }
.fmt small { font-size: 12px; color: var(--muted); margin-left: 2px; }
.fmt input:checked + span { border-color: var(--silk-edge); background: rgba(183, 167, 127, .14); }
.fmt input:focus-visible + span { outline: 2px solid var(--silk-edge); outline-offset: 2px; }

.actions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.btn { font: inherit; font-size: 14px; letter-spacing: .08em; color: var(--text); background: var(--panel); border: 1px solid var(--line); border-radius: 3px; padding: 9px 10px; cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--silk-edge); }
.btn:focus-visible { outline: 2px solid var(--silk-edge); outline-offset: 2px; }
.btn:disabled { opacity: .5; cursor: progress; }
.btn.primary { background: var(--cinnabar); border-color: var(--cinnabar); color: var(--paper); }
.btn.primary:hover { background: var(--cinnabar-hi); }
.hint { margin: 0; font-size: 13px; color: var(--muted); min-height: 1em; }
.seed { font-variant-numeric: tabular-nums; }

.ai { border: 1px solid var(--line); border-radius: 4px; padding: 14px; display: grid; gap: 10px; background: rgba(255, 255, 255, .02); }
.ai h2 { margin: 0; }
.ai-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.ai-list li { border-top: 1px solid var(--line); padding-top: 10px; display: grid; gap: 4px; }
.ai-text { font-family: var(--font-body); font-size: 17px; line-height: 1.6; }
.ai-meta { font-size: 13px; color: var(--silk-edge); }
.ai-why { font-size: 13px; color: var(--muted); }
.ai-src { font-size: 12px; color: var(--muted); overflow-wrap: anywhere; }
.ai-src a { color: var(--muted); }
.ai-use { justify-self: start; padding: 4px 14px; font-size: 13px; }
.ai-list li.on .ai-use { border-color: var(--silk-edge); color: var(--silk-edge); cursor: default; }
.ai-reply { color: var(--text); }

.more { border: 1px solid var(--line); border-radius: 4px; }
.more summary { cursor: pointer; list-style: none; padding: 11px 14px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; font-size: 14px; font-weight: 600; letter-spacing: .15em; color: var(--silk-edge); }
.more summary::-webkit-details-marker { display: none; }
.more summary::before { content: "▸"; display: inline-block; transition: transform .15s; }
.more[open] summary::before { transform: rotate(90deg); }
.more summary span { font-size: 12px; font-weight: 400; letter-spacing: .05em; color: var(--muted); }
.more summary:focus-visible { outline: 2px solid var(--silk-edge); outline-offset: 2px; }
.more-body { padding: 2px 14px 14px; display: grid; gap: 12px; }
.more-foot { display: flex; align-items: center; gap: 12px; }

.ideas { display: flex; flex-wrap: wrap; gap: 6px; }
.ideas button, .tabs button { font: inherit; font-size: 13px; color: var(--muted); background: none; border: 1px solid var(--line); border-radius: 999px; padding: 2px 12px; cursor: pointer; }
.ideas button:hover, .tabs button:hover { color: var(--text); border-color: var(--silk-edge); }
.ideas button:focus-visible, .tabs button:focus-visible { outline: 2px solid var(--silk-edge); outline-offset: 2px; }

/* 灵感集市：作品缩略图墙 */
.market { max-width: 1180px; margin: 0 auto; padding-block: 8px 40px; border-top: 1px solid var(--line); }
.market-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 16px; padding-block: 24px 16px; }
.market-head h2 { margin: 0; }
.tabs { display: flex; gap: 6px; margin-left: auto; }
.tabs button[aria-pressed="true"] { color: var(--text); border-color: var(--silk-edge); background: rgba(183, 167, 127, .14); }
.works { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 20px; }
.work { display: grid; gap: 4px; width: 100%; color: inherit; text-decoration: none; font: inherit; text-align: left; background: none; border: 0; padding: 0; cursor: pointer; }
.work img { width: 100%; height: 260px; object-fit: contain; background: var(--silk); padding: 8px; border-radius: 2px; box-shadow: 0 8px 24px rgba(0, 0, 0, .4); transition: transform .15s; }
.work:hover img, .work:focus-visible img { transform: translateY(-2px); }
.work:focus-visible { outline: 2px solid var(--silk-edge); outline-offset: 4px; }
.work-text { font-family: var(--font-body); font-size: 15px; margin-top: 6px; }
.work-meta { font-size: 12px; color: var(--muted); }
.work-cta { font-size: 12px; color: var(--silk-edge); }

.sheet { position: fixed; inset: 0; background: rgba(0, 0, 0, .78); display: grid; place-items: center; z-index: 10; padding: max(16px, env(safe-area-inset-top, 0px)) max(16px, env(safe-area-inset-right, 0px)) max(16px, env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px)); }
.sheet-body { background: var(--panel); border-radius: 6px; padding: 18px; max-width: min(560px, 100%); max-height: 100%; overflow: auto; display: grid; gap: 12px; }
.sheet-body p { margin: 0; }
.sheet-body img { max-width: 100%; height: auto; }

.foot { max-width: 1180px; margin: 0 auto; padding-block: 8px 32px; color: var(--muted); font-size: 12px; }
.foot p { margin: 0; max-width: 72em; }

@media (max-width: 820px) {
  .studio { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .mount { padding: 10px; }
  .mount::before { inset: 5px; }
  .mount canvas { max-height: 70vh; }
  .tabs { margin-left: 0; }
  .works { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .work img { height: 200px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto; } }