:root {
  --bg: #0b0e11;
  --card: #12161c;
  --card2: #171d26;
  --line: #232b36;
  --text: #eaecef;
  --dim: #9aa4b2;
  --yellow: #f0b90b;
  --yellow-dim: #8a6d1a;
  --green: #2ebd85;
  --red: #f6465d;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.55;
}
a { color: var(--yellow); text-decoration: none; }
a:hover { text-decoration: underline; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 0.86em; word-break: break-all; }
.hidden { display: none !important; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* top bar */
.topbar { border-bottom: 1px solid var(--line); background: #0e1218; position: sticky; top: 0; z-index: 20; }
.topbar-in { display: flex; align-items: center; justify-content: space-between; padding-top: 10px; padding-bottom: 10px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { width: 44px; height: 44px; border-radius: 10px; }
.brand-name { font-size: 20px; font-weight: 700; letter-spacing: 0.06em; }
.brand-cn { color: var(--yellow); }
.brand-sub { color: var(--dim); font-size: 12px; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.x-link { color: var(--text); font-weight: 600; }

/* buttons */
.btn { border: 1px solid var(--line); background: var(--card2); color: var(--text); border-radius: 10px; padding: 8px 16px; font-size: 14px; cursor: pointer; }
.btn:hover { border-color: var(--yellow-dim); }
.btn-primary { background: var(--yellow); border-color: var(--yellow); color: #181a20; font-weight: 700; }
.btn-primary:hover { background: #f8d33a; }
.btn-primary:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-ghost { background: transparent; }
.btn-small { padding: 5px 10px; font-size: 13px; }
.btn-block { width: 100%; padding: 12px 16px; font-size: 15px; }

/* cards */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin-top: 16px; }
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.card-head h2 { margin: 0; font-size: 17px; }
.card-head-note { color: var(--dim); font-size: 12.5px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: stretch; }
.two-col .card { margin-top: 16px; height: calc(100% - 16px); }
@media (max-width: 820px) { .two-col { grid-template-columns: 1fr; } }

/* status */
.status-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
@media (max-width: 820px) { .status-grid { grid-template-columns: repeat(2, 1fr); } }
.stat-label { color: var(--dim); font-size: 12.5px; }
.stat-value { font-size: 19px; font-weight: 700; margin-top: 2px; }
.progress { height: 10px; background: #1c232e; border-radius: 6px; margin-top: 14px; overflow: hidden; }
.progress-fill { height: 100%; width: 0%; background: var(--yellow); border-radius: 6px; transition: width 0.6s ease; }
.status-note { color: var(--dim); font-size: 12.5px; margin-top: 10px; }

/* wall */
.wall { display: grid; grid-template-columns: repeat(40, 1fr); gap: 1px; background: #05070a; border: 1px solid var(--line); border-radius: 8px; padding: 4px; }
.cell { aspect-ratio: 1 / 1; background-image: url('puzzle.png'); background-size: 4000% 2000%; border-radius: 1px; filter: grayscale(1) brightness(0.32); }
.cell.lit { filter: none; box-shadow: inset 0 0 0 1px rgba(240, 185, 11, 0.35); }
.wall-legend { color: var(--dim); font-size: 12.5px; margin-top: 8px; }

/* buy */
.hint { color: var(--dim); font-size: 13px; }
.buy-locked p { margin: 8px 0; }
.me-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.me-label { color: var(--dim); font-size: 12.5px; }
.me-addr { flex: 1; min-width: 120px; }
.me-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 14px 0; }
@media (max-width: 560px) { .me-grid { grid-template-columns: repeat(2, 1fr); } }
.me-grid > div { background: var(--card2); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; }
.stepper-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 10px 0; }
.stepper { display: flex; align-items: center; gap: 6px; }
.stepper input { width: 58px; text-align: center; background: var(--card2); color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: 7px 4px; font-size: 15px; }
.buy-cost strong { color: var(--yellow); }
.ref-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 6px 0 12px; }
.buy-msg { margin-top: 10px; font-size: 13.5px; min-height: 20px; }
.buy-msg.ok { color: var(--green); }
.buy-msg.err { color: var(--red); }
.invite-box { margin-top: 16px; border-top: 1px dashed var(--line); padding-top: 12px; }
.invite-row { display: flex; gap: 8px; margin-top: 6px; }
.invite-row input { flex: 1; background: var(--card2); color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; min-width: 0; }
.ai-box { margin-top: 16px; border-top: 1px dashed var(--line); padding-top: 12px; }
.social-box { margin-top: 16px; border-top: 1px dashed var(--line); padding-top: 12px; }
.social-rules { margin: 6px 0 10px; padding-left: 18px; }
.social-rules li { margin: 3px 0; }
.social-mine { list-style: none; margin: 10px 0 0; padding: 0; }
.social-mine li { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 5px 0; }
.chip { font-size: 12px; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--line); white-space: nowrap; }
.chip-pending { color: #f0b90b; border-color: #f0b90b; }
.chip-ok { color: #2ebd85; border-color: #2ebd85; }
.chip-no { color: #f6465d; border-color: #f6465d; }
.social-reason { font-size: 12px; opacity: 0.75; }
.ai-row { display: flex; gap: 8px; margin-top: 6px; align-items: stretch; }
.ai-row code { flex: 1; background: var(--card2); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; white-space: pre-wrap; }

/* draws */
.draws { list-style: none; margin: 0; padding: 0; }
.draws li { display: flex; justify-content: space-between; gap: 10px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; background: var(--card2); flex-wrap: wrap; }
.draws .d-round { font-weight: 700; }
.draws .d-state { color: var(--dim); }
.draws .d-state.done { color: var(--green); }
.draws .d-proof { flex-basis: 100%; font-size: 11.5px; color: var(--dim); }
.draws .d-state a { color: var(--green); }
.draw-note { color: var(--dim); font-size: 13px; }
.draw-note strong { color: var(--yellow); }

/* rules */
.rules { margin: 0; padding-left: 18px; }
.rules li { margin-bottom: 9px; }
.rules strong { color: var(--text); }

/* verify */
.addr-list { list-style: none; margin: 0 0 10px; padding: 0; }
.addr-list li { display: flex; flex-direction: column; gap: 2px; padding: 8px 0; border-bottom: 1px dashed var(--line); }
.addr-list li:last-child { border-bottom: none; }
.addr-list span { color: var(--dim); font-size: 12.5px; }
.refund-box { margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 12px; }

.foot { color: var(--dim); font-size: 12.5px; text-align: center; padding: 26px 0 34px; }
.foot-sep { margin: 0 8px; }

/* modal */
.modal-mask { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.66); display: flex; align-items: flex-start; justify-content: center; padding: 6vh 14px 14px; z-index: 50; }
.modal { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); width: 100%; max-width: 460px; padding: 18px 20px; max-height: 86vh; overflow: auto; }
.modal-head { display: flex; justify-content: space-between; align-items: center; }
.modal-head h3 { margin: 0; font-size: 17px; }
.tabs { display: flex; gap: 8px; margin: 14px 0; }
.tab { flex: 1; padding: 8px 4px; border-radius: 9px; border: 1px solid var(--line); background: transparent; color: var(--dim); cursor: pointer; font-size: 13.5px; }
.tab.active { color: #181a20; background: var(--yellow); border-color: var(--yellow); font-weight: 700; }
.pair-code-box { text-align: center; }
.pair-code { font-size: 38px; font-weight: 800; letter-spacing: 0.28em; color: var(--yellow); margin: 8px 0 2px; font-family: ui-monospace, Menlo, monospace; }
.pair-count { color: var(--dim); font-size: 12.5px; }
.pair-qr { display: flex; justify-content: center; margin: 14px 0 8px; min-height: 132px; align-items: center; }
.pair-qr canvas, .pair-qr img { border-radius: 8px; background: #fff; padding: 6px; }
.pair-status { font-size: 13.5px; margin-bottom: 10px; }