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

:root {
  --text: #d1d1d1;
  --text-h: #ffffff;
  --bg: #1a1a1a;
  --border: #3a3a3a;
  --field-bg: #2a2a2a;
  --accent: #aa3bff;
  --accent-bg: rgba(170, 59, 255, 0.1);
  --accent-border: rgba(170, 59, 255, 0.5);
  --shadow:
    rgba(0, 0, 0, 0.3) 0 10px 15px -3px, rgba(0, 0, 0, 0.2) 0 4px 6px -2px;

  --heading: 'Caveat', cursive;
  --sans: system-ui, 'Segoe UI', Roboto, sans-serif;

  font: 18px/145% var(--sans);
  color: var(--text);
  background: var(--bg);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
}

#app {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
  box-sizing: border-box;
  padding: 32px;
}

h1 {
  font-family: var(--heading);
  font-weight: 500;
  color: var(--text-h);
  font-size: 56px;
  margin: 0;
}

/* Amount field */
.field {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.field label {
  font-family: var(--heading);
  font-size: 22px;
  color: var(--text-h);
}

.field input[type="number"] {
  width: 280px;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--field-bg);
  color: var(--text-h);
  font-size: 18px;
  font-family: var(--sans);
  box-sizing: border-box;
}

.field input[type="number"]:focus {
  outline: none;
  border-color: var(--accent-border);
}

/* From / To row */
#currency-row {
  display: flex;
  align-items: flex-end;
  gap: 20px;
}

.currency-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.currency-group label {
  font-family: var(--heading);
  font-size: 22px;
  color: var(--text-h);
}

.currency-group select {
  min-width: 140px;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--field-bg);
  color: var(--text-h);
  font-size: 16px;
  font-family: var(--sans);
  appearance: none;
  cursor: pointer;
}

.currency-group select:focus {
  outline: none;
  border-color: var(--accent-border);
}

#swap-icon {
  color: var(--text);
  font-size: 22px;
  font-family: var(--sans);
  background: none;
  border: none;
  cursor: pointer;
  box-sizing: border-box;
  height: 48px;
  display: flex;
  align-items: center;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.2s, transform 0.2s;
}

#swap-icon:hover {
  color: var(--accent);
}


/* Convert button */
#convert {
  padding: 14px 40px;
  border-radius: 10px;
  border: none;
  background: var(--field-bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s;
}

#convert:hover {
  background: var(--accent-bg);
  color: var(--accent);
}

#convert:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}