/* Box sizing */

html {
  box-sizing: border-box;
}
*, *:before, *:after {
  box-sizing: inherit;
}

/* Constants */

:root {
  --color-active: #F3E87F;
  --color-header: #333333;
  --color-action: #333333;
  --color-action-darker: #222222;
  --color-prepare: #3B6EDC;
  --color-pause: #888888;
  --color-work: #71b571;
  --color-rest: #B15B5B;
  --color-timer-arc-total: #222222;
  --color-timer-hover: #DDEEDD;

  --base-font-size: 18px;
}

@media all and (max-width: 800px) {
  :root {
    --base-font-size: 14px;
  }
}

/* Layout */

html {
  font-size: var(--base-font-size);
}

body {
  margin: 0;
}

.g-Layout__Page {
  height: 100vh;
  overflow-y: auto;
}

.g-Layout__Header {
  background-color: var(--color-header);
  color: white;
  padding: 1rem 2rem;
  font-size: 2rem;
}

/* Animation */

.g-Animation {
  position: relative;
  overflow: hidden;
}

.g-Animation > * + * {
  width: 100vw;
  min-height: 100vh;
  position: absolute;
  left: 100vh;
  top: 0;
  animation: g-Animation__Keyframe 400ms;
}

@keyframes g-Animation__Keyframe {
  from { left: 100vh; }
  to { left: 0; }
}

/* Config */

.g-Form {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 5rem;
  background-color: white;
}

.g-Form__Label {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1rem;
  text-align: center;
  font-size: 1.3rem;
}

.g-Form__Input {
  display: block;
  text-align: center;
  margin-top: 0.5rem;
  font-size: 1.3rem;
  width: 10rem;
}

.g-Form__Duration {
  text-align: center;
  font-size: 1.5rem;
  margin-top: 1rem;
}

.g-Form__Start {
  font-size: 1.5rem;
  background-color: var(--color-action);
  border: 3px solid var(--color-action-darker);
  color: white;
  padding: 0.5rem 0.8rem;
  width: 10rem;
  margin-top: 2rem;
  cursor: pointer;
}

/* Timer */

.g-Timer {
  display: grid;
  grid-template-columns: 10% auto 10%;
  grid-template-rows: 10% auto 10% 10% 10%;
  color: white;
}

.g-Timer--Work {
  background-color: var(--color-work);
}

.g-Timer--Rest {
  background-color: var(--color-rest);
}

.g-Timer--Prepare {
  background-color: var(--color-prepare);
}

.g-Timer__Pause {
  background-color: var(--color-pause);
}

.g-Timer__Dial {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;

  width: 100%;
  height: 100%;
  grid-row: 2;
  grid-column: 2;

  background-color: transparent;
  color: inherit;
  font-size: 3rem;
  position: relative;
  border: none;
}

.g-Timer__Arc {
  width: inherit;
  height: inherit;
  position: absolute;
  top: 0;
  left: 0;
}

.g-Timer__ArcTotal {
  stroke: var(--color-timer-arc-total);
  fill: none;
  stroke-width: 20;
}

.g-Timer__ArcPrepare {
  stroke: var(--color-prepare);
  fill: none;
  stroke-width: 18;
}

.g-Timer__ArcWork {
  stroke: var(--color-work);
  fill: none;
  stroke-width: 18;
}

.g-Timer__ArcRest {
  stroke: var(--color-rest);
  fill: none;
  stroke-width: 18;
}

.g-Timer__ArcProgress {
  stroke: var(--color-active);
  fill: none;
  stroke-width: 18;
}

.g-Timer__Step {
  margin-bottom: 2rem;
}

.g-Timer__Buttons {
  display: flex;
  justify-content: space-around;
  grid-row: 4;
  grid-column: 2;
  width: 100%;
  height: 100%;
}

.g-Timer__Button {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  background-color: var(--color-action);
  border: 3px solid var(--color-action-darker);
  color: white;
  padding: 0.5rem 0.8rem;
  width: 10rem;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

.g-Timer__Button:not(:last-child) {
  margin-right: 2rem;
}

.g-Timer__Button--Active {
  background-color: var(--color-active);
  color: black;
}