/*.
   .         .' '.            __
    .        .   .           (__\_
     .         .         . -{{_(|8)
       ' .  . ' ' .  . '     (__/

    Please mind the bees!
    https://www.youtube.com/watch?v=EVCrmXW6-Pk
*/

:root {
  --color-gray-light: #fcfcfc;
  --color-gray-dark: #141414;

  --color-primary: #Fbee00;
  --color-primary-dark: #575200;
  --color-secondary: #323232;
  --color-secondary-dark: #1b1b1b;

  --color-success: #0bee00;
  --color-success-dark: #277216;
  --color-error: #Fb0e0e;
  --color-error-dark: #a10909;

  --color-background: var(--color-primary);
  --color-background-contrast: var(--color-primary-dark);
  --color-text: var(--color-gray-dark);
  --color-text-success: var(--color-success-dark);
  --color-text-error: var(--color-error-dark);
}
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: var(--color-primary-dark);
    --color-background-contrast: var(--color-secondary-dark);
    --color-text: var(--color-gray-light);
    --color-text-success: var(--color-success);
    --color-text-error: var(--color-error);
  }
}
* {
  box-sizing: border-box;
  font-family: proxima-nova, Arial, sans-serif;
}
html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  color: var(--color-text);
  font-size: 16px;
  background-color: var(--color-background);
}

.text-small {
  font-size: smaller;
}
.hidden {
  display: none;
}

ul,
ol {
  margin: 0 0 1em 0;
  text-align: left;
}

/* standard links */
a:not(.no-link):not(.btn) {
  color: var(--color-primary-dark);
  text-decoration: underline;

  @media (prefers-color-scheme: dark) {
    color: var(--color-primary);
  }
}
a:not(.no-link):not(.btn):focus,
a:not(.no-link):not(.btn):hover {
  text-decoration: none;
}

/* buttons */
.btn {
  display: inline-block;
  padding: 10px 20px;
  color: var(--color-primary);
  font-size: 1.01em;
  text-align: center;
  text-decoration: none;
  background-color: var(--color-secondary);
  border: 2px solid var(--color-secondary);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  box-shadow: 2px 2px 3px rgba(0, 0, 0, 0.1);
  transition: border-color ease-in-out 0.2s, box-shadow ease-in-out 0.2s,
    background-color ease-in-out 0.2s;

  &:focus,
  &:hover {
    text-decoration: none;
    background-color: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
  }

  &.primary {
    color: var(--color-gray-dark);
    background-color: var(--color-primary);
    border-color: var(--color-primary-dark);

    &:focus,
    &:hover {
      color: var(--color-primary);
      background-color: var(--color-primary-dark);
      border-color: var(--color-primary);
    }
  }

  &:active {
    box-shadow: none;
  }

  &:disabled,
  &.disabled {
    /** todo **/
    color: rgb(0, 0, 0) !important;
    background-color: rgb(215, 215, 215) !important;
    border-color: rgb(215, 215, 215) !important;
    box-shadow: none;
    cursor: not-allowed;
  }
}

/* inputs */
input,
textarea {
  display: block;
  width: 100%;
  padding: 10px 20px;
  font-size: 16px;
  color: var(--color-primary);
  background-color: var(--color-secondary-dark);
  border: 2px solid var(--color-secondary);
  border-radius: 2px;
  outline: none;
}

/* layout */
body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
}
main {
  margin: auto;
  text-align: center;
  max-width: 480px;
}
svg.illustration {
  display: block;
  width: 80px;
  margin: 0 auto;

  .st0 {
      fill: var(--color-gray-light);
  }
  .st1 {
      fill: var(--color-primary);
  }
  .st2 {
      fill: var(--color-gray-dark);
  }
}
.eyebrow {
  display: inline-block;
  width: auto;
  margin: 2em 0 0 0;
  padding: 0.3em 0.8em;
  text-transform: uppercase;
  letter-spacing: .05em;
  font-size: 0.8em;
  color: var(--color-primary);
  background-color: var(--color-background-contrast);
  border-radius: 20px;
}
h1 {
  margin-top: 0.1em;
  margin-bottom: 0.5em;
}
form {
  display: flex;
  flex-direction: column;
  margin: 1em 0;

  .success,
  .error {
    margin: 0.5em 0;
    
    &.hidden {
      display: none;
    }
  }
  .success {
    color: var(--color-text-success);
  }
  .error {
    color: var(--color-text-error);
  }

  input {
    text-align: center;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
  }
  button.btn {
    border-top-left-radius: 0;
    border-top-right-radius: 0;
  }
}

/* calculator section */
.calculator {
  margin: 2em 0;
  padding: 1.5em;
  border: 1px solid var(--color-text);
  border-radius: 4px;
  text-align: left;
}
.calculator h2 {
  margin-top: 0;
  text-align: center;
}
.calculator .text-small {
  text-align: center;
}
.calc-row {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
  margin: 1em 0;
}
.calc-control {
  display: grid;
  grid-template-columns: 1fr 6em;
  gap: 1em;
  align-items: center;
}
.calc-control input[type="range"] {
  --range: calc(var(--max) - var(--min));
  --ratio: calc((var(--value) - var(--min)) / var(--range));
  --sx: calc(0.5 * 2em + var(--ratio) * (100% - 2em));
  appearance: none;
  width: 100%;
  height: 6px;
  background: none;
  border: none;
  padding: 0;
  outline: none;
}
.calc-control input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 99px;
  background: var(--color-text);
  background: linear-gradient(var(--color-text), var(--color-text)) 0/var(--sx) 100% no-repeat, var(--color-background-contrast);
}
.calc-control input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-text);
  border: 2px solid var(--color-background);
  margin-top: -6px;
}
.calc-control input[type="range"]:focus::-webkit-slider-thumb,
.calc-control input[type="range"]:active::-webkit-slider-thumb {
  border-color: var(--color-text);
  background-color: var(--color-primary);
}
.calc-control input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: var(--color-background-contrast);
}
.calc-control input[type="range"]::-moz-range-progress {
  height: 6px;
  border-radius: 999px;
  background: var(--color-text);
}
.calc-control input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-text);
  border: 2px solid var(--color-background);
}
.calc-control input[type="range"]:focus::-moz-range-thumb,
.calc-control input[type="range"]:active::-moz-range-thumb {
  border-color: var(--color-text);
  background-color: var(--color-primary);
}
@media (prefers-color-scheme: dark) {
  .calc-control input[type="range"]::-moz-range-progress {
    background: var(--color-primary);
  }
  .calc-control input[type="range"]::-webkit-slider-runnable-track {
    background: linear-gradient(var(--color-primary), var(--color-primary)) 0/var(--sx) 100% no-repeat, var(--color-background-contrast);
  }
}
.calc-control input[type="number"] {
    -moz-appearance: textfield;
}
.calc-control input[type="number"]::-webkit-outer-spin-button, 
.calc-control input[type="number"]::-webkit-inner-spin-button {
  margin-left: 10px;
}
.calc-number-wrap {
  position: relative;
  width: 6em;
  box-sizing: content-box;
}
.calc-number-input {
  width: 6em;
  padding: 8px 1.2em;
  text-align: right;
}
.calc-number-wrap.calc-number-prefix .calc-number-input {
  text-align: right;
}
.calc-unit {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85em;
  color: var(--color-primary);
  opacity: 0.75;
  pointer-events: none;
}
.calc-unit-suffix {
  right: 10px;
}
.calc-unit-prefix {
  left: 10px;
}
.calc-output {
  margin-top: 1.5em;
  padding-top: 1em;
  border-top: 1px solid var(--color-text);
}
.calc-output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75em;
}
.calc-output-title {
  font-size: 0.85em;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.currency-group {
  display: inline-flex;
  border: 2px solid var(--color-secondary);
  border-radius: 2px;
  overflow: hidden;
}
.currency-btn {
  padding: 6px 10px;
  background-color: var(--color-primary-dark);
  color: var(--color-primary);
  border: none;
  cursor: pointer;
  min-width: 36px;
}
.currency-btn.is-active {
  background-color: var(--color-primary);
  color: var(--color-secondary-dark);
}
.calc-output-row {
  display: flex;
  gap: 1.5em;
  align-items: stretch;
  justify-content: space-between;
}
.calc-output-row + .calc-output-row {
  margin-top: 0.75em;
}
.calc-result {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.3em;
  margin: 0;
}
.calc-hint {
  font-size: 0.75em;
  opacity: 0.7;
}
.calc-output-row .calc-result:last-child {
  text-align: right;
}
.calc-label {
  font-size: 0.8em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.calc-number-highlight {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding-bottom: 12px;
  z-index: 0;
  color: var(--color-text);
}
.calc-number-highlight .hand-underline {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  width: 100%;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.6px;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.9;
  pointer-events: none;
  transform: scaleX(1.2);
}
@media (prefers-color-scheme: dark) {
  .calc-number-highlight {
    color: var(--color-primary);
  }
}
.calc-number {
  font-size: 1.25em;
  font-weight: bold;
}
@media (max-width: 480px) {
  .calc-output-row {
    flex-direction: column;
    gap: 0.75em;
  }
  .calc-output-row .calc-result:last-child {
    text-align: left;
  }
}
.calc-output-row .btn {
  width: 100%;
}

/* preview section */
.preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 2em 0;

  img {
    width: 100%;
    max-width: 480px;
    height: auto;
    border-radius: 4px;
    border: 1px solid var(--color-text);
    margin-bottom: 1em;
  }
}

/* did you know section */
.dyk {
  display: flex;
  flex-direction: row;
  text-align: left;
  border-top: 1px solid var(--color-text);
  border-bottom: 1px solid var(--color-text);
  padding: 2em 0;

  svg {
    min-width: 80px;
    margin-right: 1.5em;
  }

  @media (max-width: 480px) {
    flex-direction: column;
    align-items: center;
    text-align: center;

    svg {
      margin: 0 auto 1em auto;
    }
  }
}

/* footer section */
.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1em;
  margin-top: 2em;
  padding-bottom: 1em;
}