:root {
  --bg: #0f1115; --panel: #171a21; --line: #262b36; --text: #e6e9ef;
  --muted: #8b93a3; --accent: #6ea8fe; --error: #ff6b6b; --ok: #4cd07d;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; background: var(--bg); color: var(--text); }
body.center { display: grid; place-items: center; min-height: 100vh; }
h2 { font-size: 1.05rem; margin: 0 0 .75rem; }
.muted { color: var(--muted); font-size: .9rem; }
.error { color: var(--error); font-size: .9rem; }
.ok { color: var(--ok); font-size: .9rem; }
.brand { font-size: 1.1rem; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1.5rem; max-width: 560px; margin: 1rem auto; width: calc(100% - 2rem); }
.wrap { max-width: 620px; margin: 0 auto; padding-bottom: 3rem; }
.bar { display: flex; align-items: center; gap: .75rem; padding: .75rem 1.25rem; border-bottom: 1px solid var(--line); }
.spacer { flex: 1; }

.tabs { display: flex; gap: .5rem; margin: 1rem 0; }
.tab { flex: 1; background: var(--bg); border: 1px solid var(--line); color: var(--muted); padding: .5rem; border-radius: 8px; cursor: pointer; }
.tab.active { color: var(--text); border-color: var(--accent); }

form { display: grid; gap: .75rem; margin-top: .5rem; }
label { display: grid; gap: .3rem; font-size: .85rem; color: var(--muted); }
input { background: var(--bg); border: 1px solid var(--line); color: var(--text); padding: .55rem .65rem; border-radius: 8px; font: inherit; }
button, .btn { background: var(--accent); color: #0b0d12; border: 0; padding: .6rem 1rem; border-radius: 8px; font-weight: 600; cursor: pointer; display: inline-block; }
button.link { background: none; color: var(--muted); font-weight: 400; padding: .2rem .5rem; }
button:hover { filter: brightness(1.05); }

.balance { font-size: 2rem; font-weight: 700; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .6rem; }
.product { display: grid; gap: .2rem; text-align: left; background: var(--bg); border: 1px solid var(--line); color: var(--text); padding: .8rem; }
.product.selected { border-color: var(--accent); }
.pack { display: grid; gap: .2rem; text-align: left; background: var(--bg); border: 1px solid var(--line); color: var(--text); padding: .8rem; }
code { background: var(--bg); border: 1px solid var(--line); padding: .4rem .6rem; border-radius: 8px; word-break: break-all; }
.tokenrow { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.tokenrow code { flex: 1; min-width: 200px; }