:root{
  --bg:#efe9df; --card:#f7f2ea; --ink:#1a1a1c; --muted:#8b867c; --blue:#2f7bf6;
  --blue-soft:#d9e8ff; --free:#6b4e2e; --shadow:7px 7px 16px #d4cdc2, -7px -7px 16px #ffffff;
  --shadow-sm:4px 4px 10px #d8d1c6, -4px -4px 10px #ffffff;
  --inset:inset 3px 3px 8px #d8d1c6, inset -3px -3px 8px #ffffff;
  --nav:rgba(255,255,255,.78); --radius:22px; --gold:#c9a227;
}
[data-theme=dark]{
  --bg:#1a1b1f; --card:#24262c; --ink:#f1f1f3; --muted:#9aa0a8; --blue:#4d8fff;
  --blue-soft:#24344f; --free:#b8956a;
  --shadow:7px 7px 16px #0f1013, -7px -7px 16px #2c2e36;
  --shadow-sm:4px 4px 10px #121317, -4px -4px 10px #2e3138;
  --inset:inset 3px 3px 8px #121317, inset -3px -3px 8px #2e3138;
  --nav:rgba(28,30,36,.82);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  min-height:100%;-webkit-font-smoothing:antialiased}
body{padding:12px 14px 110px;overflow-x:hidden}
.hidden{display:none!important}
.page{animation:fade .22s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;gap:10px}
.user-pill{display:flex;align-items:center;gap:8px;background:var(--card);padding:5px 10px 5px 5px;
  border-radius:999px;box-shadow:var(--shadow-sm)}
.avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(145deg,#7eb0ff,#2f7bf6);
  display:grid;place-items:center;color:#fff;font-weight:700;font-size:14px;overflow:hidden;flex:0 0 auto}
.avatar img{width:100%;height:100%;object-fit:cover}
.badge{display:inline-flex;align-items:center;gap:4px;background:var(--free);color:#fff;
  padding:5px 10px;border-radius:999px;font-size:11px;font-weight:800;letter-spacing:.02em}
.badge.pro{background:linear-gradient(135deg,#f6d365,#fda085);color:#3a2200}
.badge svg{width:12px;height:12px}
.icon-pair{display:flex;gap:8px;background:var(--card);padding:5px;border-radius:999px;box-shadow:var(--shadow-sm)}
.icon-btn{width:40px;height:40px;border-radius:50%;border:0;background:transparent;color:var(--ink);
  display:grid;place-items:center;cursor:pointer;padding:0}
.icon-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.icon-btn.raised{background:var(--card);box-shadow:var(--shadow-sm)}

.acc-pill{width:100%;border:0;background:var(--card);box-shadow:var(--shadow-sm);border-radius:999px;
  padding:12px 16px;display:flex;align-items:center;gap:10px;font-weight:600;margin:0 0 14px;cursor:pointer;color:var(--ink);font-size:14px}
.acc-pill .ico{width:28px;height:28px;border-radius:50%;background:var(--blue-soft);display:grid;place-items:center;color:var(--blue)}
.acc-pill .ico svg{width:16px;height:16px}
.acc-pill .chev{margin-left:auto;color:var(--muted);opacity:.7}

/* feature cards */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 14px;
  margin-bottom:12px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:transform .15s,box-shadow .15s}
.card:active{transform:scale(.985)}
.card .ico{width:46px;height:46px;border-radius:14px;background:linear-gradient(180deg,#eaf2ff,#d4e5ff);
  display:grid;place-items:center;color:var(--blue);flex:0 0 auto}
[data-theme=dark] .card .ico{background:#2a3448}
.card .ico svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card .meta{flex:1;min-width:0}
.card .meta h3{margin:0 0 3px;font-size:15.5px;font-weight:700;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.card .meta p{margin:0;color:var(--muted);font-size:12px;line-height:1.35}
.card .chev{color:var(--muted);font-size:20px;opacity:.55;padding-left:4px}
.tag{font-size:10.5px;background:#e5e0d6;color:#666;padding:2px 8px;border-radius:999px;font-weight:600}
[data-theme=dark] .tag{background:#333;color:#bbb}

/* nav */
.nav{position:fixed;left:12px;right:12px;bottom:16px;background:var(--nav);backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);border-radius:28px;box-shadow:var(--shadow);display:grid;
  grid-template-columns:repeat(5,1fr);padding:8px 4px 6px;z-index:50}
.nav button{border:0;background:transparent;display:flex;flex-direction:column;align-items:center;gap:2px;
  font-size:10.5px;color:var(--muted);cursor:pointer;font-weight:600;padding:2px}
.nav button.active{color:var(--blue)}
.nav .ni{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;transition:background .2s,box-shadow .2s}
.nav button.active .ni{background:var(--blue-soft);box-shadow:0 0 0 4px rgba(47,123,246,.12)}
.nav .ni svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.nav button.active .ni svg{stroke:var(--blue)}

/* forms */
.btn{border:0;border-radius:18px;padding:14px 18px;font-weight:700;cursor:pointer;background:var(--blue);
  color:#fff;box-shadow:0 8px 18px rgba(47,123,246,.35);width:100%;font-size:15px}
.btn:active{transform:scale(.98)}
.btn.ghost{background:var(--card);color:var(--ink);box-shadow:var(--shadow-sm)}
.btn.sm{width:auto;padding:8px 14px;border-radius:14px;font-size:13px}
.input{width:100%;border:0;background:var(--bg);box-shadow:var(--inset);border-radius:18px;
  padding:13px 16px;font-size:15px;color:var(--ink);outline:none}
.textarea{min-height:110px;resize:vertical;font-family:inherit}
label{display:block;font-size:12.5px;color:var(--muted);margin:10px 0 6px;font-weight:600}
.h1{font-size:20px;font-weight:800;margin:4px 0 12px;letter-spacing:-.02em}
.row{display:flex;gap:10px;align-items:center}
.tabs{display:flex;gap:8px;margin-bottom:12px;overflow:auto;padding-bottom:2px}
.tabs button{border:0;background:var(--card);box-shadow:var(--shadow-sm);border-radius:999px;padding:8px 14px;
  font-weight:600;color:var(--muted);cursor:pointer;white-space:nowrap;font-size:13px}
.tabs button.active{color:#fff;background:var(--blue);box-shadow:0 6px 14px rgba(47,123,246,.35)}

/* chats */
.search-row{display:flex;gap:8px;margin-bottom:10px;align-items:center}
.search-wrap{flex:1;position:relative}
.search-wrap svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;
  stroke:var(--muted);fill:none;stroke-width:1.8;pointer-events:none}
.search-wrap .input{padding-left:42px;border-radius:999px}
.chip-row{display:flex;gap:8px;overflow-x:auto;padding:2px 0 10px;scrollbar-width:none}
.chip-row::-webkit-scrollbar{display:none}
.chip{background:var(--blue-soft);color:var(--blue);padding:8px 14px;border-radius:999px;font-size:12.5px;
  font-weight:700;border:0;cursor:pointer;white-space:nowrap;flex:0 0 auto}
.chip.active{background:var(--blue);color:#fff}
.chat-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.chat-meta .total{color:var(--muted);font-size:12.5px}
.chat-card{background:var(--card);box-shadow:var(--shadow-sm);border-radius:20px;padding:12px;margin-bottom:10px;
  display:flex;gap:12px;align-items:flex-start;cursor:pointer;transition:transform .12s}
.chat-card:active{transform:scale(.985)}
.chat-card.selected{outline:2px solid var(--blue)}
.chat-av{width:48px;height:48px;border-radius:50%;background:linear-gradient(145deg,#cfe0ff,#8eb6ff);
  display:grid;place-items:center;overflow:hidden;flex:0 0 auto;color:#fff;font-weight:700}
.chat-av img{width:100%;height:100%;object-fit:cover}
.chat-body{flex:1;min-width:0}
.chat-body .members{display:inline-flex;align-items:center;gap:4px;color:var(--muted);font-size:11.5px;font-weight:600;margin-bottom:2px}
.chat-body .members svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:1.8}
.chat-body .t{font-weight:750;font-size:14.5px;margin:0 0 3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-body .s{color:var(--muted);font-size:12px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.hint{background:var(--card);box-shadow:var(--shadow-sm);border-radius:16px;padding:12px 14px;color:var(--muted);
  font-size:12.5px;margin-bottom:12px;line-height:1.4}

.list-item{background:var(--card);box-shadow:var(--shadow-sm);border-radius:18px;padding:12px 14px;margin-bottom:10px}
.list-item .t{font-weight:700}
.list-item .s{color:var(--muted);font-size:12px;margin-top:3px}
.stat{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.stat .box{background:var(--card);box-shadow:var(--shadow-sm);border-radius:18px;padding:16px}
.stat .n{font-size:26px;font-weight:800}
.stat .l{color:var(--muted);font-size:12px}
.chart{display:flex;align-items:flex-end;gap:8px;height:120px;padding:10px 10px 22px;background:var(--card);
  border-radius:18px;box-shadow:var(--shadow-sm)}
.chart .bar{flex:1;background:linear-gradient(180deg,#4a8dff,var(--blue));border-radius:8px 8px 4px 4px;min-height:4px;position:relative}
.chart .bar span{position:absolute;bottom:-18px;left:50%;transform:translateX(-50%);font-size:10px;color:var(--muted);white-space:nowrap}

.login{text-align:center;padding:8px}
.mascot{width:150px;height:150px;margin:6px auto 14px}
.sheet{position:fixed;inset:0;background:#0006;z-index:80;display:flex;align-items:flex-end;animation:fade .18s}
.sheet .panel{background:var(--bg);width:100%;border-radius:24px 24px 0 0;padding:18px 16px 24px;
  max-height:88%;overflow:auto;box-shadow:0 -10px 30px #0003}
.switch{position:relative;width:48px;height:28px;display:inline-block}
.switch input{display:none}
.switch i{position:absolute;inset:0;background:#ccc;border-radius:999px;transition:.2s}
.switch i:before{content:"";position:absolute;width:22px;height:22px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked+i{background:var(--blue)}
.switch input:checked+i:before{transform:translateX(20px)}
.empty{text-align:center;color:var(--muted);padding:40px 10px;font-size:14px}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:100px;background:#222;color:#fff;
  padding:10px 16px;border-radius:12px;z-index:99;font-size:13px;max-width:90%}
.steps{position:relative;padding-left:28px;margin:0}
.steps:before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:2px;background:var(--gold)}
.steps li{list-style:none;margin:0 0 16px;position:relative;font-size:14px;line-height:1.4}
.steps li:before{content:attr(data-n);position:absolute;left:-28px;width:24px;height:24px;border-radius:50%;
  background:var(--gold);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700}
.rule{display:flex;gap:12px;background:var(--card);box-shadow:var(--shadow-sm);border-radius:18px;padding:14px;margin-top:10px}
.spinner{width:22px;height:22px;border:2.5px solid var(--blue-soft);border-top-color:var(--blue);
  border-radius:50%;animation:spin .7s linear infinite;margin:12px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.check{width:22px;height:22px;border-radius:6px;border:2px solid #cfc8bb;display:grid;place-items:center;flex:0 0 auto}
.chat-card.selected .check{background:var(--blue);border-color:var(--blue);color:#fff}