:root {
  --bg-0: #f7f4ef;
  --bg-1: #fffdf9;
  --text: #2f2a24;
  --muted: #6f6457;
  --line: #e8ddd0;
  --primary: #c26d52;
  --primary-strong: #ab553a;
  --accent: #4f7f7a;
  --card: rgba(255, 250, 244, 0.84);
  --shadow: 0 18px 34px rgba(96, 59, 42, 0.12);
  --radius: 18px;
  font-family: "Trebuchet MS", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(circle at 10% 15%, rgba(194, 109, 82, 0.18), transparent 34%),
    radial-gradient(circle at 85% 85%, rgba(79, 127, 122, 0.16), transparent 30%),
    linear-gradient(145deg, var(--bg-0), var(--bg-1));
  color: var(--text);
  line-height: 1.5;
}

.page-shell {
  width: min(1080px, 94vw);
  margin: 0 auto;
  padding: 1rem 0 3rem;
}

.top-nav {
  position: sticky;
  top: 0.7rem;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  width: fit-content;
  margin: 0 auto;
  padding: 0.55rem;
  border-radius: 999px;
  background: rgba(255, 250, 244, 0.75);
  border: 1px solid rgba(194, 109, 82, 0.24);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.top-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 0.18s ease;
}

.top-nav a:hover,
.top-nav a.active {
  color: #fff;
  background: linear-gradient(160deg, var(--primary), var(--primary-strong));
  border-color: rgba(171, 85, 58, 0.5);
}