:root {
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-primary: #2f6f5e;
  --color-primary-dark: #244f43;
  --color-text: #2a2a2a;
  --color-muted: #6b6b6b;
  --color-border: #e6e2da;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

a { color: var(--color-primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  background: var(--color-primary);
  color: #fff;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 20px 8px;
}

.site-title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-nav {
  background: var(--color-primary-dark);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 0 12px;
}

.nav-inner a {
  color: #eafaf3;
  padding: 12px 12px;
  font-size: 0.92rem;
  border-bottom: 3px solid transparent;
}

.nav-inner a:hover { text-decoration: none; background: rgba(255,255,255,0.08); }
.nav-inner a.active { border-bottom-color: #ffffff; font-weight: 700; }

.page-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.page-desc {
  color: var(--color-muted);
  margin-top: 0;
  margin-bottom: 24px;
}

.card-list {
  display: grid;
  gap: 14px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.meta {
  font-size: 0.88rem;
  color: var(--color-muted);
  margin: 2px 0;
}

.badge {
  display: inline-block;
  font-size: 0.78rem;
  padding: 2px 10px;
  border-radius: 999px;
  background: #e4f2ec;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}

.badge.done { background: #eef0f0; color: #555; }
.badge.todo { background: #fdf1df; color: #8a5a10; }

.empty-state {
  color: var(--color-muted);
  padding: 24px 0;
}

.embed-wrap {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-surface);
}

.embed-wrap iframe {
  width: 100%;
  height: 1200px;
  border: none;
  display: block;
}

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 600;
}
.btn:hover { background: var(--color-primary-dark); text-decoration: none; }

.site-footer {
  text-align: center;
  color: var(--color-muted);
  font-size: 0.85rem;
  padding: 20px;
}