/* =================================
   TOETRIS VARIABLES
================================= */

:root {
  --color-white: #ffffff;
  --color-black: #111111;
  --color-grey: #a5a5a5;
  --color-dark-grey: #5f5f5f;

  --color-pink: #ff8fc4;
  --color-red: #ff1818;
  --color-orange: #ff6600;
  --color-yellow: #ffff00;
  --color-green: #058000;
  --color-purple: #820082;
  --color-blue: #0808e8;

  --card-background: rgba(255, 255, 255, 0.9);
  --board-background: rgba(255, 255, 255, 0.08);

  --board-width: clamp(290px, 32vw, 460px);
  --border-radius: 18px;
  --transition: 180ms ease;
}

/* =================================
   RESET
================================= */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  overflow-x: hidden;

  color: var(--color-black);

  font-family:
    Arial,
    Helvetica,
    sans-serif;

  background-color: var(--color-grey);
  background-image: url("./img/BG.png");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
}

img,
svg {
  display: block;
  max-width: 100%;
}

/* =================================
   PAGE
================================= */

.toetris {
  width: min(100%, 1500px);
  min-height: 100vh;

  margin-inline: auto;
  padding: clamp(20px, 3vw, 48px);

  zoom: 0.85;
}

.toetris__header {
  display: flex;
  justify-content: center;

  margin-bottom: clamp(24px, 4vw, 50px);
}

.toetris__logo {
  width: clamp(190px, 25vw, 370px);
  height: auto;
}

/* =================================
   GAME LAYOUT
================================= */

.game-layout {
  display: grid;

  grid-template-columns:
    minmax(160px, 220px)
    var(--board-width)
    minmax(180px, 240px);

  grid-template-areas: "left board right";

  justify-content: center;
  align-items: start;

  gap: clamp(18px, 3vw, 45px);
}

.game-sidebar--left {
  grid-area: left;
}

.game-area {
  grid-area: board;
}

.game-sidebar--right {
  grid-area: right;
}

.game-sidebar {
  display: grid;
  gap: 16px;
}

/* =================================
   INFORMATION CARDS
================================= */

.info-card {
  display: flex;
  flex-direction: column;
  gap: 8px;

  padding: 18px 20px;

  background: var(--card-background);
  border: 2px solid var(--color-black);
  border-radius: var(--border-radius);

  box-shadow: 5px 5px 0 var(--color-black);
}

.info-card__label {
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.info-card__value {
  font-size: clamp(1.8rem, 3vw, 3rem);
  font-weight: 900;
  line-height: 1;
}

.info-card--next {
  min-height: 180px;
}

/* =================================
   GAME BOARD
================================= */

.game-area {
  position: relative;

  width: var(--board-width);
}

.game-board {
  display: grid;

  grid-template-columns: repeat(10, 1fr);
  grid-template-rows: repeat(20, 1fr);

  width: 100%;
  aspect-ratio: 1 / 2;

  overflow: hidden;

  background: var(--board-background);

  border: 4px solid var(--color-black);
  border-radius: 4px;

  box-shadow:
    8px 8px 0 var(--color-black),
    inset 0 0 0 2px rgba(255, 255, 255, 0.15);
}

/* =================================
   BOARD CELLS
================================= */

.game-cell {
  position: relative;

  min-width: 0;
  min-height: 0;

  overflow: hidden;

  border-right: 1px solid rgba(17, 17, 17, 0.08);
  border-bottom: 1px solid rgba(17, 17, 17, 0.08);
}

.game-cell:nth-child(10n) {
  border-right: 0;
}

.game-cell:nth-last-child(-n + 10) {
  border-bottom: 0;
}

/* Filled field */

.game-cell.is-filled {
  position: relative;

  border: 1px solid rgba(17, 17, 17, 0.45);
}

/* Toe image inside every filled field */

.game-cell.is-filled::after {
  content: "";

  position: absolute;
  z-index: 2;

  inset: 1px 0 0;

  background-image: url("./img/toe.png");
  background-repeat: no-repeat;
  background-position: center bottom;
  background-size: 112% auto;

  pointer-events: none;
  user-select: none;
}

/* Small highlight over the colored square */

.game-cell.is-filled::before {
  content: "";

  position: absolute;
  z-index: 1;

  inset: 0;

  background:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.2),
      transparent 45%
    );

  pointer-events: none;
}

/* =================================
   PIECE COLORS
================================= */

.game-cell--pink {
  background-color: var(--color-pink);
}

.game-cell--red {
  background-color: var(--color-red);
}

.game-cell--orange {
  background-color: var(--color-orange);
}

.game-cell--yellow {
  background-color: var(--color-yellow);
}

.game-cell--green {
  background-color: var(--color-green);
}

.game-cell--purple {
  background-color: var(--color-purple);
}

.game-cell--blue {
  background-color: var(--color-blue);
}

/* =================================
   ROW CLEAR ANIMATION
================================= */

.game-board {
  position: relative;
}

.game-cell.is-clearing {
  z-index: 5;

  transform-origin: center;

  animation:
    toetris-row-clear 420ms
    cubic-bezier(0.22, 0.8, 0.25, 1)
    forwards;

  animation-delay:
    var(--clear-delay, 0ms);

  will-change:
    transform,
    opacity,
    filter;
}

/* White flash inside each cell */

.game-cell.is-clearing::before {
  z-index: 4;

  background: rgba(255, 255, 255, 0.95);

  animation:
    toetris-cell-flash 360ms ease
    forwards;

  animation-delay:
    var(--clear-delay, 0ms);
}

/* Wave moving across the completed row */

.row-clear-wave {
  position: absolute;
  z-index: 12;

  left: 0;
  width: 100%;

  pointer-events: none;

  opacity: 0;

  background:
    linear-gradient(
      90deg,
      transparent 0%,
      rgba(255, 255, 255, 0.25) 20%,
      rgba(255, 255, 255, 1) 50%,
      rgba(255, 255, 255, 0.25) 80%,
      transparent 100%
    );

  mix-blend-mode: screen;

  transform: scaleX(0);
  transform-origin: center;

  animation:
    toetris-row-wave 430ms
    cubic-bezier(0.2, 0.75, 0.25, 1)
    forwards;

  animation-delay:
    var(--wave-delay, 0ms);
}

@keyframes toetris-row-wave {
  0% {
    opacity: 0;
    transform: scaleX(0);
  }

  35% {
    opacity: 1;
    transform: scaleX(1.08);
  }

  70% {
    opacity: 0.9;
    transform: scaleX(1);
  }

  100% {
    opacity: 0;
    transform: scaleX(0);
  }
}

@keyframes toetris-cell-flash {
  0% {
    opacity: 0;
  }

  28% {
    opacity: 0.95;
  }

  65% {
    opacity: 0.25;
  }

  100% {
    opacity: 0;
  }
}

@keyframes toetris-row-clear {
  0% {
    opacity: 1;

    transform:
      translate(0, 0)
      scale(1)
      rotate(0deg);

    filter:
      brightness(1)
      saturate(1);
  }

  25% {
    opacity: 1;

    transform:
      translate(0, -2px)
      scale(1.13)
      rotate(0deg);

    filter:
      brightness(1.8)
      saturate(1.4);

    box-shadow:
      0 0 0 2px
        rgba(255, 255, 255, 0.9),
      0 0 18px
        rgba(255, 255, 255, 0.95);
  }

  55% {
    opacity: 1;

    transform:
      translate(
        calc(var(--clear-x, 0px) * 0.35),
        -7px
      )
      scale(0.8)
      rotate(
        calc(
          var(--clear-rotate, 0deg) * 0.35
        )
      );

    filter:
      brightness(1.5)
      saturate(1.2);
  }

  100% {
    opacity: 0;

    transform:
      translate(
        var(--clear-x, 0px),
        -30px
      )
      scale(0.05)
      rotate(
        var(--clear-rotate, 0deg)
      );

    filter:
      brightness(2)
      saturate(0);
  }
}

/* =================================
   GAME OVERLAY
================================= */

.game-overlay {
  position: absolute;
  z-index: 20;

  inset: 4px;

  display: flex;
  align-items: center;
  justify-content: center;

  padding: 28px;

  visibility: hidden;
  opacity: 0;
  pointer-events: none;

  background: rgba(17, 17, 17, 0.78);
  backdrop-filter: blur(7px);

  transition:
    opacity var(--transition),
    visibility var(--transition);
}

.game-overlay.is-visible {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

.game-overlay__content {
  width: min(100%, 320px);

  padding: 28px;

  text-align: center;

  background: var(--color-white);
  border: 3px solid var(--color-black);
  border-radius: var(--border-radius);

  box-shadow: 7px 7px 0 var(--color-black);
}

.game-overlay__eyebrow {
  margin-bottom: 10px;

  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.game-overlay__title {
  margin-bottom: 12px;

  font-size: clamp(1.8rem, 4vw, 2.7rem);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.game-overlay__text {
  margin-bottom: 22px;

  color: var(--color-dark-grey);

  font-size: 0.95rem;
  line-height: 1.45;
}

/* =================================
   NEXT PIECE
================================= */

.next-piece {
  display: grid;

  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);

  width: 120px;
  aspect-ratio: 1;

  margin: 15px auto 0;
}

.next-piece > img {
  width: 100%;
  height: 100%;

  object-fit: contain;
}

/* =================================
   BUTTONS
================================= */

.game-actions {
  display: grid;
  gap: 12px;
}

.game-button {
  width: 100%;
  min-height: 48px;

  padding: 12px 18px;

  cursor: pointer;

  color: var(--color-black);

  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;

  border: 2px solid var(--color-black);
  border-radius: 999px;

  transition:
    transform var(--transition),
    box-shadow var(--transition),
    background-color var(--transition);
}

.game-button--primary {
  background: var(--color-yellow);
  box-shadow: 4px 4px 0 var(--color-black);
}

.game-button--secondary {
  background: var(--color-white);
  box-shadow: 4px 4px 0 var(--color-black);
}

.game-button:hover:not(:disabled) {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-black);
}

.game-button:active:not(:disabled) {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--color-black);
}

.game-button:focus-visible,
.mobile-control:focus-visible {
  outline: 4px solid var(--color-yellow);
  outline-offset: 4px;
}

.game-button:disabled {
  cursor: not-allowed;

  opacity: 0.45;
  box-shadow: none;
}

/* =================================
   CONTROL GUIDE
================================= */

.controls-guide {
  padding: 18px;

  background: var(--card-background);
  border: 2px solid var(--color-black);
  border-radius: var(--border-radius);

  box-shadow: 5px 5px 0 var(--color-black);
}

.controls-guide__title {
  margin-bottom: 15px;

  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.controls-guide__row {
  display: flex;
  align-items: center;
  gap: 5px;

  padding-block: 8px;

  font-size: 0.8rem;
  font-weight: 700;

  border-bottom: 1px solid rgba(17, 17, 17, 0.14);
}

.controls-guide__row:last-child {
  border-bottom: 0;
}

.controls-guide__row > span:first-child {
  margin-right: auto;
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-width: 28px;
  min-height: 28px;

  padding: 4px 8px;

  color: var(--color-white);

  font-family: inherit;
  font-size: 0.68rem;
  font-weight: 800;

  background: var(--color-black);
  border-radius: 6px;
}

/* =================================
   MOBILE CONTROLS
================================= */

.mobile-controls {
  display: none;

  grid-template-columns: repeat(4, 1fr);
  gap: 10px;

  width: min(100%, var(--board-width));

  margin: 25px auto 0;
}

.mobile-control {
  min-height: 54px;

  cursor: pointer;
  touch-action: manipulation;

  color: var(--color-black);

  font-size: 1.3rem;
  font-weight: 900;

  background: var(--color-white);
  border: 2px solid var(--color-black);
  border-radius: 12px;

  box-shadow: 4px 4px 0 var(--color-black);
}

.mobile-control:active {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--color-black);
}

.mobile-control--wide {
  grid-column: span 4;

  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;

  background: var(--color-yellow);
}

/* =================================
   TABLET
================================= */

@media (max-width: 1000px) {
  .game-layout {
    grid-template-columns:
      var(--board-width)
      minmax(180px, 230px);

    grid-template-areas:
      "left left"
      "board right";
  }

  .game-sidebar--left {
    grid-template-columns: repeat(3, 1fr);
  }

  .info-card__value {
    font-size: 2rem;
  }
}

/* =================================
   MOBILE
================================= */

@media (max-width: 720px) {
  :root {
    --board-width: min(86vw, 340px);
  }

  body {
    background-attachment: scroll;

    /*
      Plads til de faste mobilknapper,
      så de ikke dækker det nederste indhold.
    */
    padding-bottom: 145px;
  }

  .toetris {
    width: 100%;
    padding: 16px 12px 40px;
    zoom: 1;
  }

  .toetris__header {
    margin-bottom: 18px;
  }

  .toetris__logo {
    width: min(55vw, 230px);
  }

  /* =============================
     MOBILE LAYOUT
  ============================= */

  .game-layout {
    grid-template-columns: 1fr;

    grid-template-areas:
      "left"
      "board"
      "right";

    justify-items: center;
    gap: 18px;
  }

  .game-area {
    width: var(--board-width);
  }

  .game-sidebar {
    width: var(--board-width);
  }

  /* =============================
     SCORE CARDS
  ============================= */

  .game-sidebar--left {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .info-card {
    gap: 5px;
    padding: 11px 10px;

    border-radius: 12px;
    box-shadow: 3px 3px 0 var(--color-black);
  }

  .info-card__label {
    font-size: 0.56rem;
    letter-spacing: 0.08em;
  }

  .info-card__value {
    font-size: 1.45rem;
  }

  /* =============================
     RIGHT SIDEBAR
  ============================= */

  .game-sidebar--right {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .info-card--next {
    min-height: 125px;
  }

  .next-piece {
    width: 85px;
    margin-top: 8px;
  }

  /* Pause and restart beside each other */

  .game-actions {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .game-button {
    min-height: 44px;
    padding: 9px 12px;

    font-size: 0.72rem;
  }

  /* Compact music card */

  .audio-controls {
    padding: 14px;

    border-radius: 14px;
    box-shadow: 3px 3px 0 var(--color-black);
  }

  .audio-controls__header {
    margin-bottom: 12px;
  }

  .audio-controls__title {
    font-size: 0.72rem;
  }

  .audio-toggle {
    min-height: 31px;
    padding: 5px 10px;

    font-size: 0.62rem;
  }

  .volume-control {
    margin-bottom: 7px;
  }

  /*
    Keyboard-guiden er overflødig på mobil.
    Den var den lange hvide kasse på dit billede.
  */

  .controls-guide {
    display: none;
  }

  /* =============================
     FIXED MOBILE CONTROLS
  ============================= */

  .mobile-controls {
    position: fixed;
    z-index: 100;

    left: 50%;
    bottom: max(10px, env(safe-area-inset-bottom));

    transform: translateX(-50%);

    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 7px;

    width: min(calc(100% - 20px), 430px);

    margin: 0;
    padding: 9px;

    background: rgba(255, 255, 255, 0.92);

    border: 2px solid var(--color-black);
    border-radius: 16px;

    box-shadow: 4px 4px 0 var(--color-black);

    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .mobile-control {
    min-height: 44px;

    font-size: 1.05rem;

    border-radius: 10px;
    box-shadow: 2px 2px 0 var(--color-black);
  }

  .mobile-control:active {
    transform: translate(2px, 2px);
    box-shadow: none;
  }

  .mobile-control--wide {
    grid-column: 1 / -1;

    min-height: 40px;

    font-size: 0.72rem;
  }

  /* =============================
     OVERLAY
  ============================= */

  .game-overlay {
    padding: 16px;
  }

  .game-overlay__content {
    padding: 20px 16px;
  }

  .game-overlay__title {
    font-size: 1.8rem;
  }

  .game-overlay__text {
    font-size: 0.85rem;
  }
}

/* =================================
   SMALL MOBILE
================================= */

@media (max-width: 420px) {
  :root {
    --board-width: min(88vw, 310px);
  }

  .toetris {
    padding-inline: 10px;
  }

  .game-sidebar--left {
    gap: 6px;
  }

  .info-card {
    padding: 10px 7px;
  }

  .info-card__value {
    font-size: 1.25rem;
  }

  .mobile-controls {
    width: calc(100% - 16px);
    padding: 7px;
    gap: 6px;
  }

  .mobile-control {
    min-height: 41px;
  }

  .mobile-control--wide {
    min-height: 38px;
  }
}

/* =================================
   REDUCED MOTION
================================= */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* =================================
   AUDIO CONTROLS
================================= */

.audio-controls {
  padding: 18px;

  background: var(--card-background);
  border: 2px solid var(--color-black);
  border-radius: var(--border-radius);

  box-shadow: 5px 5px 0 var(--color-black);
}

.audio-controls__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;

  margin-bottom: 18px;
}

.audio-controls__title {
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.audio-toggle {
  min-height: 34px;
  padding: 7px 12px;

  cursor: pointer;

  color: var(--color-white);

  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;

  background: var(--color-black);
  border: 2px solid var(--color-black);
  border-radius: 999px;

  transition:
    color var(--transition),
    background-color var(--transition),
    transform var(--transition);
}

.audio-toggle:hover {
  transform: translateY(-2px);
}

.audio-toggle.is-muted {
  color: var(--color-black);
  background: var(--color-white);
}

.audio-toggle:focus-visible,
.volume-slider:focus-visible {
  outline: 4px solid var(--color-yellow);
  outline-offset: 4px;
}

.volume-control {
  display: flex;
  align-items: center;
  justify-content: space-between;

  margin-bottom: 10px;

  font-size: 0.75rem;
  font-weight: 800;
}

.volume-control__value {
  min-width: 42px;
  text-align: right;
}

.volume-slider {
  width: 100%;
  height: 8px;

  cursor: pointer;

  appearance: none;
  -webkit-appearance: none;

  background: rgba(17, 17, 17, 0.18);
  border: 2px solid var(--color-black);
  border-radius: 999px;
}

.volume-slider::-webkit-slider-thumb {
  width: 20px;
  height: 20px;

  cursor: grab;

  appearance: none;
  -webkit-appearance: none;

  background: var(--color-yellow);
  border: 2px solid var(--color-black);
  border-radius: 50%;
}

.volume-slider::-webkit-slider-thumb:active {
  cursor: grabbing;
}

.volume-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;

  cursor: grab;

  background: var(--color-yellow);
  border: 2px solid var(--color-black);
  border-radius: 50%;
}

.volume-slider::-moz-range-track {
  height: 6px;

  background: rgba(17, 17, 17, 0.18);
  border-radius: 999px;
}