:root {
  --bg-1: #0c1821;
  --bg-2: #1b2a41;
  --card: rgba(255, 255, 255, 0.08);
  --text: #f6f7fb;
  --muted: #c8d1e0;
  --buy: #00c16a;
  --sell: #ff6b4a;
  --accent: #2ec4ff;
  --danger: #ff3b30;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #2f4866 0%, var(--bg-2) 35%, var(--bg-1) 80%);
}

.page {
  width: min(980px, 92%);
  margin: 28px auto;
}

.card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  padding: 18px;
  backdrop-filter: blur(8px);
}

h1,
h2,
h3 {
  margin: 0 0 12px;
}

input,
select,
button {
  width: 100%;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  padding: 10px 12px;
  font-size: 16px;
}

input,
select {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f6f7fb' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 20px;
  padding-right: 32px;
}

select option {
  background: #1b2a41;
  color: #f6f7fb;
}

button {
  background: linear-gradient(90deg, #1ec6ff, #24a0ff);
  color: #001523;
  border: none;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  filter: brightness(1.08);
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.row {
  display: flex;
  gap: 10px;
}

.signal-main {
  font-size: clamp(40px, 8vw, 72px);
  text-align: center;
  letter-spacing: 2px;
  padding: 14px;
  border-radius: 16px;
  border: 2px solid rgba(255, 255, 255, 0.25);
}

.signal-main.buy {
  color: var(--buy);
  text-shadow: 0 0 22px rgba(0, 193, 106, 0.55);
}

.signal-main.sell {
  color: var(--sell);
  text-shadow: 0 0 22px rgba(255, 107, 74, 0.55);
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.2);
}

.history-item .action.buy {
  color: var(--buy);
}

.history-item .action.sell {
  color: var(--sell);
}

.msg {
  min-height: 20px;
  color: var(--muted);
  margin-top: 8px;
}

.msg.error {
  color: var(--danger);
}

a {
  color: var(--accent);
}

.small {
  font-size: 13px;
  color: var(--muted);
}