:root { --paper: #fbf6ee; --ink: #2b2420; --muted: #7a6d63; --accent: #c4473a; --line: #e7dccd; --ok: #2f7a4f; color-scheme: light; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.5 Georgia, "Iowan Old Style", serif; }
a { color: var(--accent); }
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; max-width: 1040px; margin: 0 auto; padding: 18px 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 700; color: var(--ink); text-decoration: none; }
.brand img { width: 36px; height: 36px; }
.testnet { font: 600 .8rem/1 system-ui, sans-serif; background: #fff1c7; color: #7a5b00; padding: 6px 10px; border-radius: 999px; }
main { max-width: 1040px; margin: 0 auto; padding: 0 16px 32px; }
.hero h1 { font-size: 2.2rem; margin: 12px 0 4px; }
.hero p { color: var(--muted); margin: 0 0 20px; }
.hero.ok h1 { color: var(--ok); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.card { display: grid; grid-template-columns: 1fr auto; gap: 4px 8px; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px;
  color: var(--ink); text-decoration: none; box-shadow: 0 2px 10px rgba(80, 50, 20, .08); transition: transform .15s; }
.card:hover { transform: translateY(-3px) rotate(-.5deg); }
.card img { grid-column: 1 / -1; width: 100%; border-radius: 6px; display: block; }
.card .title { font-weight: 700; }
.card .price { color: var(--accent); font-weight: 700; }
h2 { margin-top: 40px; }
.wall { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.wall figure { margin: 0; background: #fff; padding: 6px; border: 1px solid var(--line); border-radius: 6px; }
.wall img { width: 100%; display: block; border-radius: 3px; }
.wall figcaption { font: .8rem/1.3 system-ui, sans-serif; color: var(--muted); margin-top: 4px; }
.buy, .postcard { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: #fff; border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 4px 24px rgba(80, 50, 20, .12); overflow: hidden; }
.front { width: 100%; height: 100%; object-fit: cover; display: block; }
.back { padding: 22px; display: flex; flex-direction: column; gap: 10px; border-left: 1px dashed var(--line); }
.back h1 { margin: 0; }
label { display: flex; flex-direction: column; gap: 4px; font: 600 .9rem/1.3 system-ui, sans-serif; }
input, textarea { font: 1rem/1.4 Georgia, serif; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); color: var(--ink); }
button, .button { display: inline-block; font: 700 1rem/1 system-ui, sans-serif; background: var(--accent); color: #fff; border: 0; border-radius: 10px;
  padding: 14px 18px; cursor: pointer; text-decoration: none; text-align: center; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--accent); font-weight: 700; }
.postcard .back { position: relative; padding-top: 80px; }
.stamp { position: absolute; top: 16px; right: 16px; width: 56px; }
.stamp img { width: 100%; }
.to { font-weight: 700; margin: 0; }
.message p { margin: 0 0 6px; font-style: italic; font-size: 1.1rem; }
.from { text-align: right; margin: 0; }
footer { max-width: 1040px; margin: 0 auto; padding: 24px 16px 40px; color: var(--muted); font: .85rem/1.5 system-ui, sans-serif; border-top: 1px solid var(--line); }
@media (max-width: 700px) {
  .buy, .postcard { grid-template-columns: 1fr; }
  .back { border-left: 0; border-top: 1px dashed var(--line); }
  .hero h1 { font-size: 1.7rem; }
}