* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family:
    system-ui,
    -apple-system,
    sans-serif;
}

/* BODY */
body {
  min-height: 100vh;
  background: linear-gradient(135deg, #fc8fb0, #4865ea);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(10px, 3vw, 40px);
}

/* CONTAINER */
.container {
  width: 100%;
  max-width: 420px;
}

/* CARD */
.mainBox {
  width: 100%;
  max-width: 420px;
  padding: clamp(20px, 4vw, 30px);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

/* HEADING */
.heading {
  text-align: center;
  font-size: clamp(2.5rem, 3.5vw, 3rem);
  margin-bottom: 18px;
  color: #222;
}

/* FORM */
form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* LABEL TEXT */
.amount p,
.from p,
.to p {
  font-size: clamp(0.75rem, 1.8vw, 0.9rem);
  margin-bottom: 6px;
  color: #444;
}

/* INPUT */
.amount input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #ccc;
  outline: none;
  font-size: clamp(0.85rem, 2vw, 1rem);
}

/* DROPDOWN */
.dropdown {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}

/* FROM / TO */
.from,
.to {
  flex: 1;
}

/* SELECT BOX */
.selectContainer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid #ccc;
  background: #fff;
}

/* FLAG */
.flagImg {
  width: 26px;
  height: 18px;
  display: none;
}

/* SELECT */
select {
  border: none;
  outline: none;
  width: 100%;
  font-size: clamp(0.8rem, 2vw, 0.95rem);
  background: transparent;
  cursor: pointer;
}

/* SWAP ICON */
#submitImg {
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: 0.2s;
}

#submitImg:hover {
  background: #eee;
  transform: rotate(180deg);
}

/* MESSAGE */
.massage {
  text-align: center;
  font-size: 0.9rem;
  min-height: 20px;
  font-weight: 900;
  font-size: clamp(1rem, 3vw, 1.4rem);
}

.massage.success {
  color: #000fff;
}

.massage.error {
  color: red;
}

.massage.loading {
  color: #007bff;
}

/* BUTTONS */
button {
  padding: 11px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: 0.2s;
  font-size: clamp(0.85rem, 2vw, 1rem);
}

/* PRIMARY */
.getExchange {
  background: #0088ff;
  color: #fff;
  font-weight: 600;
}

.getExchange:hover {
  background: #004c9d;
}

/* RESET */
.resetButton {
  background: #f1f1f1;
}

.resetButton:hover {
  background: #868686;
}

/* MOBILE FIX */
@media (max-width: 480px) {
  .dropdown {
    flex-direction: column;
    align-items: stretch;
  }

  #submitImg {
    align-self: center;
    transform: rotate(90deg);
  }

  #submitImg:hover {
    transform: rotate(270deg);
  }
}