:root {
  --bg: #ffffff;
  --bg-subtle: #f7f7f8;
  --text: #1a1a1a;
  --muted: #8c8c8c;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eef2ff;
  --border: #ebebeb;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0,0,0,.06);
  --danger: #cf1322;
  --warn: #d97706;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", system-ui, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 1rem; }
.site-header { background: #fff; border-bottom: 1px solid var(--border); padding: .75rem 0; position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.logo-text { font-weight: 700; text-decoration: none; color: var(--text); }
.nav-main { display: flex; flex-wrap: wrap; gap: .75rem 1rem; }
.nav-main a { color: var(--text); text-decoration: none; font-size: .9rem; }
.nav-main a:hover { color: var(--accent); }
.site-main { padding: 1.5rem 0 3rem; min-height: 60vh; }
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; background: var(--bg-subtle); font-size: .85rem; color: var(--muted); }
.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); }
.btn { display: inline-block; padding: .6rem 1.2rem; border-radius: 999px; border: none; font-size: 1rem; cursor: pointer; text-decoration: none; text-align: center; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-block { display: block; width: 100%; }
.btn-sm { padding: .35rem .75rem; font-size: .875rem; }
.btn-link { background: none; border: none; color: var(--accent); padding: .5rem 0; cursor: pointer; }
.form label { display: block; margin-bottom: 1rem; }
.form input, .form select, .form textarea { width: 100%; padding: .6rem .75rem; border: 1px solid var(--border); border-radius: 8px; font-size: 1rem; margin-top: .35rem; font-family: inherit; }
.checkbox { display: flex; gap: .5rem; align-items: flex-start; }
.alert { padding: .75rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.alert-error { background: #fff2f0; color: var(--danger); }
.alert-ok { background: #f6ffed; color: #389e0d; }
.hint { color: var(--muted); font-size: .9rem; }
.lead { font-size: 1.1rem; color: #444; }
.hero { text-align: center; padding: 2rem 0; }
.hero-kicker { color: var(--accent); font-weight: 600; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-top: 1.5rem; }
.hero-free-badge { display: inline-block; margin: 1rem 0 0; padding: .35rem .85rem; background: var(--accent-soft); color: var(--accent); border-radius: 999px; font-size: .9rem; font-weight: 600; }
.footer-free-note { color: var(--accent); font-weight: 600; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-top: 2rem; }
.feature-card { background: var(--accent-soft); border-radius: var(--radius); padding: 1.25rem; }
.register-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: start; }
@media (max-width: 768px) { .register-layout { grid-template-columns: 1fr; } .site-header { position: static; } }
.register-points { padding-left: 1.2rem; }
.auth-card { max-width: 480px; margin: 2rem auto; }
.safe-banner { background: var(--accent-soft); padding: 1rem; border-radius: 8px; margin-top: 2rem; }
.dash-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.project-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.project-item { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: center; }
.project-item h2 { margin: 0 0 .35rem; font-size: 1.15rem; }
.project-item h2 a { color: inherit; text-decoration: none; }
.project-item h2 a:hover { color: var(--accent); }
.project-meta { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.badge { display: inline-block; padding: .15rem .5rem; background: var(--accent-soft); color: var(--accent); border-radius: 999px; font-size: .75rem; font-weight: 600; }
.empty-state { text-align: center; padding: 2rem; }
.dialog-card { border: none; border-radius: var(--radius); padding: 0; max-width: 420px; width: calc(100% - 2rem); box-shadow: 0 8px 32px rgba(0,0,0,.15); }
.dialog-card::backdrop { background: rgba(0,0,0,.35); }
.dialog-card form { padding: 1.25rem; }
.dialog-actions { display: flex; gap: .5rem; justify-content: flex-end; flex-wrap: wrap; margin-top: .5rem; }
.member-list { list-style: none; padding: 0; margin: 0 0 1rem; }
.member-list li { padding: .5rem 0; border-bottom: 1px solid var(--border); display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.dash-section { margin-bottom: 1.5rem; }
.danger-zone { border-color: #ffccc7; }
.breadcrumb { font-size: .9rem; color: var(--muted); }
.breadcrumb a { color: var(--accent); }
.guide-steps { line-height: 1.8; padding-left: 1.25rem; }
.site-main h2 { margin: 1.5rem 0 .75rem; font-size: 1.2rem; }
code { background: var(--bg-subtle); padding: .1rem .35rem; border-radius: 4px; font-size: .9em; }