:root{
  --bg:#F2F2F7;--card:#fff;--text:#000;--muted:rgba(60,60,67,.55);
  --line:rgba(60,60,67,.15);--primary:#007AFF;--danger:#FF3B30;--green:#34C759;
  --safe-t:env(safe-area-inset-top,0px);--safe-b:env(safe-area-inset-bottom,0px);
}
@media(prefers-color-scheme:dark){
  :root{--bg:#000;--card:#1C1C1E;--text:#fff;--muted:rgba(235,235,245,.55);
  --line:rgba(84,84,88,.6);}
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;height:100dvh;}
body{
  font-family:-apple-system,BlinkMacSystemFont,'SF Pro Text','Helvetica Neue',sans-serif;
  background:var(--bg);color:var(--text);
  -webkit-font-smoothing:antialiased;
  overscroll-behavior:none;
}

/* Topbar */
.topbar{
  padding-top:var(--safe-t);
  background:rgba(255,255,255,.88);backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:.5px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  padding-left:16px;padding-right:16px;height:calc(var(--safe-t) + 44px);
  position:sticky;top:0;z-index:100;
}
@media(prefers-color-scheme:dark){.topbar{background:rgba(28,28,30,.88);}}
.brand{font-size:17px;font-weight:700;color:var(--text);text-decoration:none;}
.topbar nav{display:flex;gap:4px;}
.topbar nav a{padding:6px 12px;border-radius:8px;font-size:15px;color:var(--primary);text-decoration:none;}
.topbar nav a:active{background:var(--line);}

/* Main */
.main{padding:16px;padding-bottom:calc(var(--safe-b) + 80px);max-width:600px;margin:0 auto;}

/* Bottombar */
.bottombar{
  position:fixed;bottom:0;left:0;right:0;
  padding-bottom:var(--safe-b);
  background:rgba(255,255,255,.88);backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-top:.5px solid var(--line);
  display:flex;z-index:100;
}
@media(prefers-color-scheme:dark){.bottombar{background:rgba(28,28,30,.88);}}
.bottombar a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:49px;gap:2px;color:var(--muted);text-decoration:none;font-size:10px;font-weight:500;
}
.bottombar a.active{color:var(--primary);}
.bottombar .ni{font-size:22px;line-height:1;}

/* Cards */
.card{background:var(--card);border-radius:16px;overflow:hidden;}

/* Rows */
.row{
  display:flex;align-items:center;padding:12px 16px;gap:12px;
  border-bottom:.5px solid var(--line);background:var(--card);
  text-decoration:none;color:var(--text);cursor:pointer;
  -webkit-tap-highlight-color:transparent;
}
.row:last-child{border-bottom:none;}
.row:active{background:var(--line);}
.row.static{cursor:default;}
.row.static:active{background:var(--card);}
.row.highlight{background:rgba(0,122,255,.06);}
.row-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px;}
.row-title{font-size:17px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.row-amt{font-size:17px;font-weight:600;font-variant-numeric:tabular-nums;flex-shrink:0;}
.row-amt.pos{color:var(--green);}
.row-amt.neg{color:var(--danger);}
.row-amt.zero{color:var(--muted);}
.chev{color:var(--muted);font-size:15px;flex-shrink:0;}
.muted{font-size:13px;color:var(--muted);}

/* Balance hero */
.balance-hero{padding:20px 20px;margin-bottom:16px;text-align:center;border-radius:16px;}
.balance-hero.pos{background:rgba(52,199,89,.12);}
.balance-hero.neg{background:rgba(255,59,48,.1);}
.balance-hero.zero{background:var(--card);}
.bal-label{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin-bottom:6px;}
.bal-amount{font-size:38px;font-weight:700;font-variant-numeric:tabular-nums;}
.balance-hero.pos .bal-amount{color:var(--green);}
.balance-hero.neg .bal-amount{color:var(--danger);}
.bal-sub{font-size:13px;color:var(--muted);margin-top:4px;}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 18px;border-radius:10px;border:none;
  font-family:inherit;font-size:15px;font-weight:600;
  cursor:pointer;text-decoration:none;-webkit-tap-highlight-color:transparent;
  transition:opacity .15s;
}
.btn:active{opacity:.65;}
.btn.primary{background:var(--primary);color:#fff;}
.btn.ghost{background:var(--line);color:var(--primary);}
.btn.danger{background:var(--danger);color:#fff;}
.danger-text{color:var(--danger)!important;}

/* Forms */
.fg{margin-bottom:14px;}
.fg label{display:block;font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);margin-bottom:6px;padding:0 4px;}
.fg small{display:block;font-size:12px;color:var(--muted);margin-top:4px;padding:0 4px;}
input,select,textarea{
  width:100%;padding:11px 14px;background:var(--card);border:.5px solid var(--line);
  border-radius:10px;font-family:inherit;font-size:16px;color:var(--text);
  outline:none;-webkit-appearance:none;appearance:none;
}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,122,255,.15);}
select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238e8e93' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px;}
textarea{resize:none;}
input[type=number]::-webkit-inner-spin-button{opacity:0;}
.check-row{display:flex;align-items:center;gap:10px;font-size:15px;padding:4px 0;cursor:pointer;}
.check-row input{width:auto;}

/* Layout helpers */
.stack{display:flex;flex-direction:column;gap:8px;}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.header h2,.header h3{font-size:20px;font-weight:700;}
.seg{display:flex;align-items:center;gap:8px;justify-content:flex-end;}
.sec-hd{font-size:15px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;margin-top:4px;}
.empty{padding:48px 24px;text-align:center;color:var(--muted);}

/* Alerts */
.alert{padding:13px 16px;border-radius:12px;font-size:15px;margin-bottom:14px;}
.alert.ok{background:rgba(52,199,89,.12);color:#1a7a30;}
.alert.danger{background:rgba(255,59,48,.1);color:#c0392b;}
@media(prefers-color-scheme:dark){.alert.ok{color:#4cd964;}.alert.danger{color:#ff6b6b;}}

/* Auth */
.auth-wrap{display:flex;align-items:center;justify-content:center;min-height:70vh;}
.auth-wrap .card{width:100%;max-width:360px;padding:28px 24px;}
.auth-logo{font-size:28px;font-weight:700;text-align:center;margin-bottom:24px;}

/* Pills */
.pill{display:inline-block;padding:2px 10px;border-radius:20px;font-size:12px;font-weight:600;background:var(--line);color:var(--muted);}
.pills{display:flex;flex-wrap:wrap;gap:6px;}

/* Member / benef rows */
.member-row{display:flex;align-items:center;gap:10px;font-size:15px;padding:8px 0;cursor:pointer;}
.member-row input[type=checkbox]{width:20px;height:20px;flex-shrink:0;}
.benef-row{display:flex;align-items:center;gap:10px;padding:6px 0;border-bottom:.5px solid var(--line);}
.benef-row:last-child{border-bottom:none;}
.benef-row .member-row{flex:1;margin:0;padding:0;}
.benef-row .weight{width:70px;flex-shrink:0;padding:8px 10px;font-size:14px;}
.share-val{font-size:13px;font-variant-numeric:tabular-nums;color:var(--muted);width:70px;text-align:right;flex-shrink:0;}

/* AI Box */
.ai-box{padding:14px;margin-bottom:14px;background:linear-gradient(135deg,rgba(175,82,222,.08),rgba(0,122,255,.08));border:1px solid rgba(175,82,222,.2);border-radius:14px;}
.ai-header{font-size:15px;font-weight:600;margin-bottom:10px;}
.ai-input-row{display:flex;gap:8px;align-items:flex-start;}
.ai-input-row textarea{flex:1;min-height:56px;font-size:15px;}
.mic-btn{width:48px;height:48px;border-radius:50%;border:none;background:var(--primary);color:#fff;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 3px 12px rgba(0,122,255,.35);-webkit-tap-highlight-color:transparent;}
.mic-btn.rec{background:var(--danger);animation:mic-pulse 1s infinite;}
@keyframes mic-pulse{0%,100%{box-shadow:0 3px 12px rgba(255,59,48,.4);}50%{box-shadow:0 3px 20px rgba(255,59,48,.7);}}