:root {
  --bg: #0b0d10;
  --card: #14181d;
  --card2: #1a1f26;
  --fg: #e7ecf1;
  --dim: #8a95a3;
  --acc: #7ad2ff;
  --pos: #4ade80;
  --neg: #f87171;
  --err: #ef4444;
  --radius: 14px;
  --tab-h: 62px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg);
  font: 15px/1.45 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
.app { max-width: 640px; margin: 0 auto; padding: 16px 16px calc(var(--tab-h) + 16px); min-height: 100vh; }

/* login */
.login { max-width: 340px; margin: 20vh auto 0; }
.login h1 { font-size: 22px; margin: 0 0 20px; }
.login form { display: grid; gap: 12px; }
.login label { display: grid; gap: 6px; color: var(--dim); font-size: 13px; }
.login input { padding: 12px 14px; border-radius: 10px; border: 1px solid #2a323c;
  background: var(--card); color: var(--fg); font-size: 16px; }
.login button { padding: 12px; border-radius: 10px; border: 0; background: var(--acc); color: #001018;
  font-weight: 600; font-size: 15px; cursor: pointer; }
.err { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.35);
  color: var(--err); border-radius: 10px; padding: 10px 12px; margin-bottom: 12px; font-size: 14px; }

/* balance */
.hello { color: var(--dim); font-size: 14px; margin: 4px 0 20px; }
.balance { background: linear-gradient(160deg, var(--card), var(--card2));
  border-radius: var(--radius); padding: 22px; }
.balance-label { color: var(--dim); font-size: 13px; }
.balance-amount { font-size: 38px; font-weight: 700; margin-top: 4px; letter-spacing: -.02em; }
.balance-amount small { font-size: 16px; color: var(--dim); font-weight: 500; margin-left: 6px; }

.wallets { margin-top: 22px; }
.wallets h2 { font-size: 14px; color: var(--dim); font-weight: 600; text-transform: uppercase;
  letter-spacing: .06em; margin: 0 0 10px; }
.wallet-card { background: var(--card); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 10px; }
.wallet-label { font-weight: 600; }
.wallet-label .chain { color: var(--dim); font-weight: 400; font-size: 12px; margin-left: 6px; }
.wallet-addr { color: var(--dim); font-family: ui-monospace, monospace; font-size: 12px; margin: 4px 0; }
.wallet-sum { font-size: 13px; color: var(--dim); }

/* history */
.pagehead { font-size: 18px; font-weight: 700; margin: 4px 0 14px; }
.filters { display: flex; gap: 8px; margin-bottom: 12px; }
.filters select, .filters button { padding: 8px 10px; border-radius: 10px; border: 1px solid #2a323c;
  background: var(--card); color: var(--fg); font-size: 14px; }
.filters button { background: var(--acc); color: #001018; border: 0; font-weight: 600; }
.ledger { list-style: none; margin: 0; padding: 0; }
.op { background: var(--card); border-radius: 12px; padding: 12px 14px; margin-bottom: 8px; }
.op-top { display: flex; justify-content: space-between; align-items: baseline; }
.op-type { font-weight: 600; }
.op-amount { font-variant-numeric: tabular-nums; font-weight: 600; }
.op.in .op-amount { color: var(--pos); }
.op.out .op-amount { color: var(--neg); }
.op-bot { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; color: var(--dim); font-size: 12px; }
.empty { color: var(--dim); text-align: center; padding: 40px 0; }
.more { display: block; text-align: center; margin: 14px 0; color: var(--acc); }

/* ai */
.chat { min-height: 40vh; display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.msg { padding: 10px 14px; border-radius: 14px; max-width: 88%; white-space: pre-wrap; }
.msg.user { background: var(--acc); color: #001018; align-self: flex-end; }
.msg.assistant { background: var(--card); align-self: flex-start; }
.chatbar { display: flex; gap: 8px; position: sticky; bottom: calc(var(--tab-h) + 8px); }
.chatbar input { flex: 1; padding: 12px 14px; border-radius: 24px; border: 1px solid #2a323c;
  background: var(--card); color: var(--fg); font-size: 15px; }
.chatbar button { width: 46px; height: 46px; border-radius: 50%; border: 0; background: var(--acc);
  color: #001018; font-size: 20px; cursor: pointer; }

/* tabbar */
.tabbar { position: fixed; bottom: 0; left: 0; right: 0; height: var(--tab-h);
  background: rgba(11,13,16,.92); backdrop-filter: blur(10px); border-top: 1px solid #1c2129;
  display: flex; justify-content: space-around; align-items: center; padding-bottom: env(safe-area-inset-bottom); }
.tab { color: var(--dim); text-decoration: none; padding: 8px 14px; border-radius: 10px; font-size: 13px; }
.tab.on { color: var(--fg); background: var(--card); }
.tab-logout button { background: transparent; border: 0; color: var(--dim); font-size: 18px; cursor: pointer; padding: 8px 14px; }