@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  outline: none;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background: linear-gradient(160deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.logo {
  width: 72px;
  height: 72px;
  display: block;
  margin: 0 auto 20px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.15);
}

main {
  width: calc(100% - 16px);
  max-width: 375px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(24px);
  border-radius: 28px;
  margin: 0 auto;
  padding: 28px 24px 22px;
  overflow-y: auto;
  max-height: calc(100vh - 140px);
}

label {
  color: rgba(255, 255, 255, 0.45);
  font-weight: 500;
  font-size: 11px;
  display: block;
  margin-bottom: 6px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

select, input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  height: 48px;
  width: 100%;
  margin-bottom: 14px;
  padding-left: 16px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  color: #ffffff;
  font-family: 'Inter', sans-serif;
  transition: border-color 0.2s ease, background 0.2s ease;
  outline: none;
  -webkit-appearance: none;
}

select option {
  background: #302b63;
  color: #fff;
}

select:hover, input:hover {
  border-color: rgba(167, 139, 250, 0.5);
  background: rgba(255, 255, 255, 0.09);
}

select:focus, input:focus {
  border-color: #a78bfa;
  background: rgba(167, 139, 250, 0.08);
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.15);
  outline: none !important;
}

input::placeholder {
  color: rgba(255, 255, 255, 0.3);
}

button {
  background: linear-gradient(135deg, #a78bfa 0%, #7c3aed 100%);
  border-radius: 14px;
  width: 100%;
  border: none;
  height: 48px;
  color: #ffffff;
  font-weight: 700;
  font-size: 15px;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  margin-bottom: 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
  letter-spacing: 0.3px;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(124, 58, 237, 0.5);
}

button:active {
  transform: scale(0.98);
  box-shadow: 0 3px 10px rgba(124, 58, 237, 0.4);
}

section {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
  margin-top: 6px;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.arrow-img {
  margin: 10px 0;
  width: 14px;
  height: auto;
  opacity: 0.4;
  filter: invert(1);
}

.currency-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.currency {
  color: rgba(255, 255, 255, 0.4);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.currency-value-to-convert {
  color: rgba(255, 255, 255, 0.75);
  font-weight: 700;
  font-size: 20px;
}

.currency-value-converted {
  color: #a78bfa;
  font-weight: 700;
  font-size: 24px;
}

#currency-image-to-convert, #currency-image-converted {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.12);
  object-fit: cover;
}

/* Mobile */
@media (max-width: 480px) {
  body { padding: 10px; }

  .logo { width: 60px; height: 60px; margin-bottom: 14px; }

  main {
    padding: 22px 18px 18px;
    max-height: calc(100vh - 110px);
    width: calc(100% - 20px);
  }

  select, input { height: 44px; margin-bottom: 12px; font-size: 14px; }

  button { height: 44px; font-size: 14px; margin-bottom: 12px; }

  section { margin-top: 8px; padding: 16px 12px; }

  .currency-value-to-convert { font-size: 18px; }
  .currency-value-converted  { font-size: 22px; }

  #currency-image-to-convert, #currency-image-converted { width: 36px; height: 36px; }
}

/* Telas muito pequenas (altura) */
@media (max-height: 700px) {
  .logo { width: 48px; height: 48px; margin-bottom: 10px; }

  main {
    padding: 16px 14px;
    max-height: calc(100vh - 90px);
    border-radius: 22px;
  }

  select, input { height: 38px; margin-bottom: 8px; font-size: 13px; border-radius: 12px; }

  button { height: 40px; font-size: 13px; margin-bottom: 8px; border-radius: 12px; }

  section { margin-top: 6px; padding: 12px 10px; border-radius: 18px; }

  .arrow-img { margin: 6px 0; }

  .currency-value-to-convert { font-size: 16px; }
  .currency-value-converted  { font-size: 19px; }

  #currency-image-to-convert, #currency-image-converted { width: 32px; height: 32px; }
}

/* Desktop */
@media (min-width: 768px) {
  body { padding: 20px; }
  .logo { width: 80px; height: 80px; margin-bottom: 20px; }
  main { max-height: calc(100vh - 160px); }
}