:root { color-scheme: light; font-family: -apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif; color:#1d1d1f; background:#f5f5f7; }
* { box-sizing:border-box; }
body { min-width:320px; min-height:100vh; margin:0; background:radial-gradient(circle at 78% 4%,rgba(0,113,227,.1),transparent 28%),#f5f5f7; }
button,input { font:inherit; }
[hidden] { display:none!important; }
.site-nav { height:58px; display:flex; align-items:center; justify-content:space-between; padding:0 max(22px,calc((100vw - 1280px)/2)); border-bottom:1px solid rgba(0,0,0,.08); background:rgba(255,255,255,.86); backdrop-filter:blur(18px); }
.brand { display:flex; align-items:center; gap:10px; color:#1d1d1f; font-size:15px; font-weight:700; text-decoration:none; }
.brand img { width:26px; height:26px; border-radius:7px; }
.site-nav nav { display:flex; align-items:center; gap:14px; color:#6e6e73; font-size:13px; }
.site-nav nav a,.link-button { color:inherit; text-decoration:none; }
.link-button { padding:0; border:0; background:transparent; cursor:pointer; }
.shell { width:min(1080px,calc(100% - 36px)); margin:0 auto; padding:72px 0 96px; }
.hero { display:grid; grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr); gap:38px; align-items:end; margin-bottom:30px; }
.eyebrow { margin:0 0 12px; color:#0071e3; font-size:12px; font-weight:750; letter-spacing:.07em; text-transform:uppercase; }
h1 { margin:0; font-size:clamp(48px,8vw,84px); line-height:.98; letter-spacing:-.065em; }
.lead { max-width:650px; margin:24px 0 0; color:#6e6e73; font-size:17px; line-height:1.7; }
.reward-summary { padding:24px; border:1px solid rgba(0,113,227,.13); border-radius:25px; background:linear-gradient(145deg,#fff,#eef6ff); box-shadow:0 14px 45px rgba(0,0,0,.04); }
.reward-summary strong { display:block; font-size:28px; letter-spacing:-.04em; }
.reward-summary span { display:block; margin-top:9px; color:#6e6e73; font-size:13px; line-height:1.55; }
.notice { margin:0 0 18px; padding:14px 16px; border:1px solid rgba(52,168,83,.18); border-radius:14px; background:#eef8f1; color:#28763d; font-size:13px; line-height:1.55; }
.notice[data-tone="error"] { border-color:rgba(196,43,28,.17); background:#fff1ef; color:#a52b20; }
.card { border:1px solid rgba(0,0,0,.06); border-radius:28px; background:rgba(255,255,255,.94); box-shadow:0 14px 46px rgba(0,0,0,.04); }
.auth-card { max-width:680px; margin:8vh auto 0; padding:46px; text-align:center; }
.auth-card h1 { font-size:clamp(38px,6vw,58px); }
.auth-card p { margin:18px auto 26px; color:#6e6e73; line-height:1.65; }
.google-button { min-height:46px; display:flex; justify-content:center; overflow:hidden; }
.section-card { padding:28px; margin-top:18px; }
.section-heading { display:flex; align-items:center; justify-content:space-between; gap:20px; margin-bottom:22px; }
.section-heading h2 { margin:0; font-size:27px; letter-spacing:-.035em; }
.quota { color:#6e6e73; font-size:13px; }
.quota strong { color:#1d1d1f; font-size:24px; }
.create-form { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:10px; }
.create-form input { min-height:48px; padding:0 15px; border:1px solid rgba(0,0,0,.11); border-radius:14px; outline:0; background:#f5f5f7; }
.create-form input:focus { border-color:rgba(0,113,227,.55); box-shadow:0 0 0 3px rgba(0,113,227,.1); }
.primary,.secondary,.danger { min-height:44px; display:inline-flex; align-items:center; justify-content:center; padding:0 18px; border-radius:13px; font-weight:650; cursor:pointer; text-decoration:none; }
.primary { border:1px solid #0071e3; background:#0071e3; color:#fff; }
.secondary { border:1px solid rgba(0,0,0,.1); background:#fff; color:#0066cc; }
.danger { border:1px solid rgba(180,35,24,.15); background:#fff; color:#b42318; }
button:disabled { cursor:default; opacity:.5; }
.guidance { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-top:18px; }
.guide-step { padding:16px; border-radius:16px; background:#f5f5f7; color:#6e6e73; font-size:12px; line-height:1.55; }
.guide-step b { display:block; margin-bottom:6px; color:#1d1d1f; font-size:13px; }
.invitation-list,.reward-list { display:grid; gap:12px; }
.empty { padding:38px 16px; border:1px dashed rgba(0,0,0,.12); border-radius:18px; color:#86868b; text-align:center; font-size:13px; }
.invite-row { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:18px; padding:20px; border:1px solid rgba(0,0,0,.07); border-radius:19px; background:#fff; }
.invite-title { display:flex; flex-wrap:wrap; align-items:center; gap:8px; }
.invite-title strong { font-size:17px; }
.status { padding:5px 9px; border-radius:999px; background:#edf5ff; color:#2466a8; font-size:11px; font-weight:700; }
.status[data-state="completed"] { background:#edf8f2; color:#287c52; }
.status[data-state="cancelled"],.status[data-state="expired"] { background:#f0f0f2; color:#6e6e73; }
.invite-copy { margin:10px 0 0; color:#6e6e73; font-size:13px; line-height:1.55; }
.invite-meta { margin:8px 0 0; color:#a1a1a6; font-size:11px; }
.row-actions { display:flex; align-items:center; flex-wrap:wrap; justify-content:flex-end; gap:8px; }
.reward-row { display:flex; align-items:center; justify-content:space-between; gap:18px; padding:18px 20px; border:1px solid rgba(0,0,0,.07); border-radius:17px; }
.reward-row strong { display:block; }
.reward-row span { display:block; margin-top:6px; color:#6e6e73; font-size:12px; }
.invite-steps { display:grid; gap:12px; margin-top:20px; }
.task { display:grid; grid-template-columns:36px minmax(0,1fr) auto; gap:14px; align-items:center; padding:17px; border:1px solid rgba(0,0,0,.07); border-radius:17px; }
.task-number { width:34px; height:34px; display:grid; place-items:center; border-radius:50%; background:#edf5ff; color:#0071e3; font-weight:750; }
.task[data-done="true"] .task-number { background:#e9f7ee; color:#287c52; }
.task strong { display:block; }
.task p { margin:5px 0 0; color:#6e6e73; font-size:12px; line-height:1.5; }
.task-result { color:#287c52; font-size:12px; font-weight:700; }
.task-actions { display:flex; align-items:center; justify-content:flex-end; gap:10px; }
.invite-terms { margin:18px 0 0; color:#86868b; font-size:12px; line-height:1.6; }
@media (max-width:760px) { .shell{padding-top:44px}.hero{grid-template-columns:1fr}.guidance{grid-template-columns:1fr}.invite-row{grid-template-columns:1fr}.row-actions{justify-content:flex-start}.task{grid-template-columns:34px 1fr}.task> :last-child{grid-column:2}.task-actions{justify-content:flex-start;flex-wrap:wrap}.create-form{grid-template-columns:1fr}.section-heading{align-items:flex-start}.reward-row{align-items:flex-start;flex-direction:column} }