/* Tanox LTX — sober dark theme */
:root {
  --bg: #0d0a14;
  --card: #171021;
  --border: #2a2138;
  --text: #ece8f4;
  --muted: #948da6;
  --accent: #a855f7;
  --accent-2: #ec4899;
  --error: #f87171;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}

.page {
  max-width: 440px;
  margin: 0 auto;
  padding: 40px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.brand { text-align: center; }
.brand-mark {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.35em;
  text-indent: 0.35em;
}
.brand-plus {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding: 0 2px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

h1 { font-size: 24px; font-weight: 700; }
.subtitle { color: var(--muted); font-size: 14px; }

.notice {
  background: rgba(168, 85, 247, 0.08);
  border: 1px solid rgba(168, 85, 247, 0.35);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--muted);
}

.field { display: flex; flex-direction: column; gap: 8px; }
.field-label { font-size: 13px; font-weight: 600; color: var(--muted); }

input[type="text"], input[type="number"] {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 12px;
  font-size: 14px;
  width: 100%;
}
input:focus { outline: none; border-color: var(--accent); }

.presets { display: grid; grid-template-columns: 1fr 1fr 1fr 1.4fr; gap: 8px; }
.preset {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 12px 0;
  font-size: 14px;
  cursor: pointer;
}
.preset.active { border-color: var(--accent); color: var(--accent); }
.hint { font-size: 12px; color: var(--muted); }

.error {
  color: var(--error);
  font-size: 13px;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: 10px;
  padding: 10px 12px;
}

.buy {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 12px;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  padding: 14px;
  cursor: pointer;
}
.buy:disabled { opacity: 0.6; cursor: wait; }
.powered { text-align: center; font-size: 12px; color: var(--muted); }

.footer { text-align: center; font-size: 12px; color: var(--muted); display: flex; flex-direction: column; gap: 8px; }
.footer a { color: var(--accent); text-decoration: none; }