:root {
  --bg: #000;
  --input: #1c1c1c;
  --neutral: #fff;
  --opacityBtn: #9a9a9a;
  --before: #ff8f8f;
  --error: #d31e3e;
  --hover: #222222;
  --radius: 10px;
  --space-1: 1rem;
  --space-2: 2rem;
  --space-3: 3rem;
  --width: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--neutral);
  font-family: "Roboto", sans-serif;
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.converter {
  width: 1200px;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

/* left */

.left-side img {
  width: 600px;
  display: block;
}

/* right */

.right-side {
  padding: var(--space-3) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.title {
  width: 350px;
  display: block;
}

/* exchange section */

.exchange {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.exchange label {
  font-size: 15px;
  font-weight: 500;
}

.exchange span {
  font-size: 10px;
  color: var(--opacityBtn);
}

.exchange .row {
  display: flex;
  gap: 0.5rem;
}

.exchange input {
  background: var(--input);
  border: none;
  border-radius: var(--radius);
  padding: 0 0.5rem;
  color: var(--neutral);
  font-size: 16px;
}

/* removes number arrows */

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* custom select  */

.custom-select {
  position: relative;
  width: 130px;
  font-size: 16px;
}

.select-trigger {
  width: var(--width);
  background: var(--input);
  color: var(--neutral);
  border: none;
  border-radius: var(--radius);
  padding: var(--space-1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.select-options {
  position: absolute;
  top: var(--width);
  margin-top: 6px;
  left: 0;
  width: var(--width);
  background: var(--input);
  border-radius: var(--radius);
  padding: 0.3rem 0;
  list-style: none;
  margin: 0;
  display: none;
  z-index: 10;
}

.select-options li {
  padding: 0.7rem var(--space-1);
  cursor: pointer;
}

.select-options li:hover {
  background: var(--hover);
}

.custom-select.open .select-options {
  display: block;
}

.select-value > span {
  color: var(--neutral);
  font-size: 16px;
}

/* buttons */

.buttons {
  display: flex;
  gap: var(--space-1);
}

.buttons .btn {
  width: 170px;
  padding: 0.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--input);
  background: var(--neutral);
  color: var(--bg);
  font-weight: 700;
  cursor: pointer;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.buttons .btn.outline {
  background: transparent;
  border: 1px solid var(--neutral);
  color: var(--neutral);
}

.buttons .btn:disabled {
  opacity: 0.7;
  cursor: default;
}

/* loading anim */

.spinner {
  width: 18px;
  height: 18px;
  border: 3px solid rgba(0, 0, 0, 0.2);
  border-top-color: var(--before);
  border-radius: 50%;
}

.spinner.spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* results */

.result-main {
  font-size: 24px;
  font-weight: 700;
  position: relative;
  display: inline-block;
  z-index: 1;
}

.result-main span {
  font-size: 25px;
  color: var(--neutral);
  position: relative;
}

.result-main span::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 1px;
  width: var(--width);
  height: 9px;
  background: var(--before);
  z-index: -1;
  border-radius: 4px;
}

.result-rate {
  margin-top: 10px;
  font-size: 14px;
  color: var(--neutral);
}

/* error */

.exchange .input-error {
  border: 3px solid var(--error);
}

.exchange .input-error:focus {
  outline: none;
  border-color: var(--before);
}

/* hidden button */

.hidden {
  display: none;
}