:root {
  --paper: #f3ecdf;
  --ink: #241c16;
  --muted: #5c5146;
  --line: #e0d3c2;
  --clay: #8d2f22;
  --pine: #1d3a32;
  --panel: #fffaf4;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  min-height: 100dvh;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  border-top: 8px solid var(--clay);
}
button, input, textarea { font: inherit; color: inherit; }
img { display: block; max-width: 100%; }

.top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 12px 16px;
  padding: 20px 16px 8px;
  padding-top: max(20px, env(safe-area-inset-top));
  max-width: 760px;
  margin: 0 auto;
}
.mark {
  margin: 0 0 4px;
  letter-spacing: 0.16em;
  font-size: 12px;
  color: var(--muted);
}
h1 { margin: 0; font-size: 32px; font-weight: 600; }
.tools { display: flex; gap: 12px; align-items: center; }
.tools a, .tools button {
  color: var(--ink);
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 16px calc(32px + env(safe-area-inset-bottom));
}
.intro, .hint, .status, .file span { color: var(--muted); line-height: 1.5; }
.intro { margin: 8px 0 18px; }
.panel {
  margin: 0 0 16px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
}
.fields { display: grid; gap: 0 14px; }
h2 { margin: 0 0 14px; font-size: 22px; }
label { display: block; margin: 0 0 14px; font-size: 14px; }
input, textarea {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 12px 12px;
  border: 1px solid #d9cbb6;
  border-radius: 12px;
  background: #fff;
  font-size: 16px;
}
textarea { resize: vertical; }
.image-row { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 8px; }
.file { min-width: 0; flex: 1; }
.file input { width: 100%; max-width: 100%; }
#preview {
  width: 120px;
  height: 120px;
  flex: none;
  object-fit: cover;
  border-radius: 16px;
  background: #e7d5bf;
}
.file span { display: block; margin-top: 6px; font-size: 13px; }
.primary {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 14px 18px;
  background: var(--pine);
  color: #f6f1e7;
  font-size: 16px;
  cursor: pointer;
}
@media (hover: hover) {
  .primary:hover { background: #163029; }
}
.primary:disabled { opacity: 0.55; cursor: not-allowed; }
.status { min-height: 1.4em; margin: 10px 0 0; }
:focus-visible { outline: 2px solid var(--clay); outline-offset: 3px; }

@media (max-width: 639px) {
  h1 { font-size: 28px; }
  .top { flex-direction: column; align-items: flex-start; }
  .image-row { flex-direction: column; }
}

@media (min-width: 640px) {
  .top { align-items: flex-end; padding-left: 20px; padding-right: 20px; }
  main { padding-left: 20px; padding-right: 20px; }
  .panel { padding: 22px; }
  .image-row { align-items: center; }
}

@media (min-width: 800px) {
  .fields { grid-template-columns: 1fr 1fr; }
  .primary { width: auto; }
}