:root {
  --bg: #eef7ff;
  --panel: #ffffff;
  --primary: #6db8ff;
  --primary-dark: #307fca;
  --text: #12314f;
  --border: #b7dcff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #e2f2ff 0%, #f7fbff 100%);
  display: grid;
  place-items: center;
  padding: 20px;
}

.app {
  width: min(430px, 100%);
  background: var(--panel);
  border: 2px solid var(--primary-dark);
  border-radius: 18px;
  box-shadow: 0 12px 30px rgba(48, 127, 202, 0.15);
  padding: 14px;
}

.screen {
  display: none;
  min-height: 640px;
}

.screen.active {
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.icon-btn {
  border: 2px solid var(--primary-dark);
  background: #fff;
  color: var(--primary-dark);
  font-size: 1.15rem;
  font-weight: 800;
  border-radius: 10px;
  width: 44px;
  height: 34px;
  cursor: pointer;
}

.icon-btn.close {
  color: #3568a8;
}

.balance-mini {
  border: 2px solid var(--primary-dark);
  border-radius: 8px;
  padding: 5px 10px;
  font-weight: 800;
  color: var(--primary-dark);
  background: #fff;
}

.main-grid {
  display: grid;
  gap: 16px;
  margin-top: 10px;
}

.extra-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr 1fr;
}

.card-btn {
  width: 100%;
  border: 2px solid var(--primary-dark);
  background: #f8fcff;
  color: var(--text);
  border-radius: 20px;
  padding: 20px 12px;
  display: grid;
  justify-items: center;
  gap: 12px;
  font-size: 1.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.card-btn.large {
  min-height: 200px;
}

.card-btn.profile {
  grid-column: 1 / -1;
}

.card-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(48, 127, 202, 0.15);
}

.card-btn:active {
  transform: translateY(0);
}

.card-emoji {
  font-size: 2.6rem;
  line-height: 1;
}

.brand {
  margin-top: auto;
  border-top: 2px solid var(--primary-dark);
  padding-top: 12px;
  text-align: center;
  color: var(--primary-dark);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 18px);
  background: #2f74b8;
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 600;
  box-shadow: 0 10px 22px rgba(28, 125, 211, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}