:root {
  color-scheme: light;
  --ink: #34432f;
  --muted: #6f7869;
  --leaf: #718763;
  --leaf-soft: #e7eedf;
  --paper: #fffdf6;
  --sand: #f6edd9;
  --line: rgba(70, 91, 59, .16);
}

* { box-sizing: border-box; }

html { min-height: 100%; background: #edf2e5; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", "Microsoft YaHei", serif;
  background:
    radial-gradient(circle at 18% 16%, rgba(255,255,255,.9), transparent 27%),
    linear-gradient(155deg, #e7efe0 0 51%, #f7eedb 51% 100%);
}

.scene { display: grid; place-items: center; padding: 48px 20px 28px; }

.postcard {
  width: min(720px, 100%);
  padding: 54px clamp(24px, 7vw, 72px) 44px;
  text-align: center;
  background: var(--paper);
  border: 1px solid rgba(255,255,255,.8);
  border-radius: 22px;
  box-shadow: 0 24px 70px rgba(57, 72, 49, .16);
  transform: rotate(-.35deg);
}

.hat-mark { width: 112px; margin: 0 auto 16px; }
.hat-mark svg { display: block; width: 100%; filter: drop-shadow(0 8px 7px rgba(86,58,24,.13)); }
.eyebrow { margin: 0 0 14px; color: var(--leaf); font: 700 12px/1.5 system-ui, sans-serif; letter-spacing: .16em; }
h1 { margin: 0; font-size: clamp(32px, 6vw, 54px); font-weight: 800; letter-spacing: .03em; }
.subtitle { margin: 18px 0 0; color: var(--muted); font-size: clamp(15px, 2.4vw, 18px); line-height: 1.9; }

.tool-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 34px; }
.tool-card {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 16px 18px;
  color: var(--ink);
  text-align: left;
  text-decoration: none;
  background: var(--leaf-soft);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.tool-card:hover, .tool-card:focus-visible { transform: translateY(-2px); background: #eef3e8; box-shadow: 0 10px 24px rgba(57,72,49,.12); outline: none; }
.tool-card svg { width: 38px; height: 38px; flex: 0 0 auto; fill: none; stroke: var(--leaf); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.tool-card span { display: grid; gap: 3px; }
.tool-card strong { font-size: 16px; }
.tool-card small { color: var(--muted); font: 12px/1.3 system-ui, sans-serif; }
.building { margin: 28px 0 0; color: #808777; font-size: 13px; }
.site-footer { padding: 14px 20px 22px; text-align: center; font: 12px/1.5 system-ui, sans-serif; }
.site-footer a { color: #66705f; text-underline-offset: 3px; }

@media (max-width: 640px) {
  .scene { padding: 26px 14px 18px; }
  .postcard { padding: 38px 20px 32px; border-radius: 18px; transform: none; }
  .hat-mark { width: 92px; }
  .tool-nav { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .tool-card { transition: none; }
}