/* SvipMail layout: header, footer, container, cards */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .nav { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; color: var(--text); }
.brand .logo { height: 34px; width: auto; flex: none; display: block; }
.site-footer .brand .logo { height: 28px; }
.brand b { background: var(--brand-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 18px; margin-left: 8px; }
.nav-links a { color: var(--text-muted); font-size: .95rem; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-spacer { flex: 1; }
.nav-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
}
.theme-toggle:hover { border-color: var(--brand); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius-sm);
  border: 1px solid var(--brand); background: var(--brand-grad); color: #fff;
  font-weight: 600; font-size: .95rem; transition: transform .15s, box-shadow .15s;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); text-decoration: none; }
.btn.secondary { background: var(--bg-card); color: var(--text); }
/* 内容页 .prose a 的链接色不得覆盖按钮文字 */
.prose a.btn { color: #fff; }
.prose a.btn.secondary { color: var(--text); }

.site-footer {
  margin-top: 64px;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 36px 0;
  color: var(--text-muted);
  font-size: .9rem;
}
.site-footer .grid { display: grid; gap: 24px; grid-template-columns: 1.4fr 1fr 1fr 1fr; }
.site-footer h4 { color: var(--text); font-size: .95rem; margin-bottom: 10px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.site-footer a { color: var(--text-muted); }
.site-footer .copy { margin-top: 24px; border-top: 1px solid var(--border); padding-top: 16px; text-align: center; }

.hero { padding: 56px 0 36px; text-align: center; }
.hero h1 { background: var(--brand-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { color: var(--text-muted); font-size: 1.1rem; max-width: 680px; margin: 0 auto 20px; }

.section { padding: 32px 0; }
.section-title { display: flex; align-items: baseline; gap: 12px; margin-bottom: 18px; }
.section-title h2 { margin: 0; }
.section-title .more { margin-left: auto; font-size: .9rem; color: var(--text-muted); }

.grid-tools { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.tool-card {
  display: flex; flex-direction: column; gap: 8px;
  padding: 20px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); box-shadow: var(--shadow); transition: transform .15s, border-color .15s;
}
.tool-card:hover { transform: translateY(-2px); border-color: var(--brand); text-decoration: none; }
.tool-card .icon { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 10px; background: color-mix(in srgb, var(--brand) 12%, transparent); color: var(--brand); }
.tool-card h3 { margin: 0; color: var(--text); }
.tool-card p { margin: 0; color: var(--text-muted); font-size: .92rem; }
.tool-card .tag { font-size: .75rem; color: var(--brand); margin-top: 4px; }

.breadcrumb { font-size: .85rem; color: var(--text-muted); margin: 16px 0; }
.breadcrumb ol { list-style: none; padding: 0; margin: 0; display: flex; gap: 6px; flex-wrap: wrap; }
.breadcrumb li+li::before { content: "›"; margin-right: 6px; color: var(--text-muted); }

/* 邮箱登录入口 */
.mail-group-label { margin: 20px 0 10px; font-size: .92rem; font-weight: 600; color: var(--text-muted); }
.mail-group-label:first-of-type { margin-top: 4px; }
.mail-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); }
.mail-card {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 16px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg-card); color: var(--text);
  box-shadow: var(--shadow);
}
.mail-card:hover { border-color: var(--brand); text-decoration: none; transform: translateY(-1px); transition: transform .15s, border-color .15s; }
.mail-card .m-name { font-weight: 600; font-size: .96rem; line-height: 1.3; }
.mail-card .m-domain { display: block; margin-top: 2px; color: var(--text-muted); font-size: .76rem; }
.mail-card .m-ext { flex: none; margin-left: auto; color: var(--text-muted); }

@media (max-width: 820px) {
  .nav-links { display: none; }
  .site-footer .grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .site-footer .grid { grid-template-columns: 1fr; }
}