/*
 * PwC Card Game
 * Brand reference: PwC Quiz (white background, PwC logo, orange + charcoal, Georgia)
 */

:root {
  /* PwC colours */
  --pwc-orange: #fd5108;
  --pwc-orange-logo: #f26628;
  --pwc-tangerine: #fe7c39;
  --pwc-amber: #ff9a00;
  --pwc-red: #e0301e;
  --pwc-black: #2d2d2d;
  --pwc-grey: #4b4b4c;
  --pwc-grey-light: #f3f3f3;
  --pwc-grey-line: #dedede;
  --white: #ffffff;

  /* Fonts — same family choices as the PwC quiz */
  --font-heading: Georgia, "Times New Roman", serif;
  --font-body: "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* One card size drives the whole layout, so the game fits any screen
     (1080 x 1920 kiosk, tablet, phone, desktop) without scrolling. */
  --card: min(26vw, 14.3vh);
  --gap: calc(var(--card) * 0.085);
}

html {
  box-sizing: border-box;
}

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

* {
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
}

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--pwc-black);
  background: var(--white);
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: manipulation;
}

/* ------------------------------------------------------------------ *
 *  Layout
 * ------------------------------------------------------------------ */

.container {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: calc(var(--card) * 0.12) 0;
}

.header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.header-logo {
  height: calc(var(--card) * 0.62);
  width: auto;
  display: block;
}

.title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: calc(var(--card) * 0.21);
  line-height: 1.15;
  margin-top: calc(var(--card) * 0.14);
  color: var(--pwc-black);
}

.subtitle {
  font-size: calc(var(--card) * 0.098);
  color: var(--pwc-grey);
  margin-top: calc(var(--card) * 0.04);
}

/* ------------------------------------------------------------------ *
 *  Score panel
 * ------------------------------------------------------------------ */

.score-panel {
  width: calc(var(--card) * 3 + var(--gap) * 4);
  margin-top: calc(var(--card) * 0.13);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

.panel-item {
  display: flex;
  align-items: center;
  gap: calc(var(--card) * 0.04);
  font-size: calc(var(--card) * 0.1);
}

.panel-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: calc(var(--card) * 0.07);
  font-weight: 700;
  color: var(--pwc-grey);
}

.panel-value {
  font-weight: 700;
  font-size: calc(var(--card) * 0.13);
  font-variant-numeric: tabular-nums;
  color: var(--pwc-black);
}

.panel-moves {
  justify-self: start;
}

.stars {
  list-style: none;
  display: flex;
  margin-left: calc(var(--card) * 0.02);
  font-size: calc(var(--card) * 0.11);
  line-height: 1;
}

.star {
  color: var(--pwc-amber);
  transition: color 0.3s;
}

.star.off {
  color: var(--pwc-grey-line);
}

.panel-timer {
  flex-direction: column;
  gap: 0;
  justify-self: center;
}

.timer-value {
  font-size: calc(var(--card) * 0.24);
  line-height: 1.05;
  color: var(--pwc-orange);
  transition: color 0.3s;
}

.panel-timer.low .timer-value {
  color: var(--pwc-red);
  animation: tick 1s ease-in-out infinite;
}

.restart {
  justify-self: end;
  border: 0;
  background: none;
  font-family: inherit;
  cursor: pointer;
  padding: calc(var(--card) * 0.04) 0 calc(var(--card) * 0.04) calc(var(--card) * 0.06);
}

.restart-icon {
  width: calc(var(--card) * 0.17);
  height: calc(var(--card) * 0.17);
  padding: calc(var(--card) * 0.03);
  border-radius: 50%;
  background: var(--pwc-black);
  fill: var(--white);
  transition: transform 0.4s, background-color 0.2s;
}

.restart:hover .restart-icon,
.restart:active .restart-icon {
  background: var(--pwc-orange);
  transform: rotate(180deg);
}

/* Countdown bar */
.time-bar {
  width: calc(var(--card) * 3 + var(--gap) * 4);
  height: calc(var(--card) * 0.03);
  min-height: 4px;
  margin-top: calc(var(--card) * 0.06);
  background: var(--pwc-grey-line);
  border-radius: 99px;
  overflow: hidden;
}

.time-bar-fill {
  height: 100%;
  width: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--pwc-amber), var(--pwc-orange));
  transition: width 1s linear;
}

.time-bar-fill.low {
  background: var(--pwc-red);
}

/* ------------------------------------------------------------------ *
 *  Deck — 10 cards laid out 2 / 3 / 3 / 2
 * ------------------------------------------------------------------ */

.deck {
  list-style: none;
  margin-top: calc(var(--card) * 0.09);
  padding: var(--gap);
  display: grid;
  grid-template-columns: repeat(6, calc((var(--card) - var(--gap)) / 2));
  gap: var(--gap);
  background: var(--pwc-grey-light);
  border-radius: calc(var(--card) * 0.13);
}

.deck .card {
  grid-column: span 2;
  width: var(--card);
  height: var(--card);
  cursor: pointer;
  perspective: calc(var(--card) * 4);
}

/* first and last rows hold two cards, centred */
.deck .card:nth-child(1),
.deck .card:nth-child(9) {
  grid-column: 2 / span 2;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.45s cubic-bezier(0.4, 0.2, 0.2, 1);
}

.card.open .card-inner,
.card.match .card-inner {
  transform: rotateY(180deg);
}

.card-back,
.card-front {
  position: absolute;
  inset: 0;
  border-radius: calc(var(--card) * 0.1);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

/* The orange tile */
.card-back {
  background-color: var(--pwc-orange);
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 116 36'%3E%3Cpath fill='%23fff' fill-opacity='.3' d='M0 36 18 18h40L40 36zM58 18 76 0h40L98 18z'/%3E%3C/svg%3E"),
    linear-gradient(150deg, #ff6f1f 0%, var(--pwc-orange) 55%, #ee4a05 100%);
  background-repeat: no-repeat;
  background-position: center, center;
  background-size: 46% auto, cover;
  box-shadow:
    0 calc(var(--card) * 0.03) calc(var(--card) * 0.08) rgba(45, 45, 45, 0.22),
    inset 0 0 0 calc(var(--card) * 0.012) rgba(255, 255, 255, 0.18);
  transition: filter 0.2s, transform 0.2s;
}

.card:not(.open):not(.match):active .card-back {
  transform: scale(0.96);
  filter: brightness(0.95);
}

/* The face with the icon */
.card-front {
  transform: rotateY(180deg);
  background: var(--white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 7% 5%;
  box-shadow:
    0 calc(var(--card) * 0.03) calc(var(--card) * 0.08) rgba(45, 45, 45, 0.16),
    inset 0 0 0 calc(var(--card) * 0.012) var(--pwc-grey-line);
  transition: box-shadow 0.3s;
}

.card-image {
  width: 62%;
  height: auto;
  flex: 0 1 auto;
  min-height: 0;
  pointer-events: none;
}

.card-name {
  font-family: var(--font-heading);
  font-size: calc(var(--card) * 0.082);
  line-height: 1.15;
  text-align: center;
  color: var(--pwc-black);
  margin-top: 3%;
}

/* Matched pair */
.card.match {
  cursor: default;
  animation: matched 0.6s 0.35s both;
}

.card.match .card-front {
  box-shadow:
    0 calc(var(--card) * 0.03) calc(var(--card) * 0.08) rgba(253, 81, 8, 0.25),
    inset 0 0 0 calc(var(--card) * 0.022) var(--pwc-orange);
}

/* Wrong pair */
.card.wrong {
  animation: shake 0.5s;
}

/* Cards dealing in at the start */
.card.deal {
  animation: deal 0.45s cubic-bezier(0.2, 0.8, 0.3, 1.2) backwards;
}

.card.deal.match {
  animation: matched 0.6s 0.35s both;
}

.card.deal.wrong {
  animation: shake 0.5s;
}

/* ------------------------------------------------------------------ *
 *  Buttons + popup
 * ------------------------------------------------------------------ */

.button {
  display: inline-block;
  border: 0;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: calc(var(--card) * 0.12);
  color: var(--white);
  background: var(--pwc-orange);
  padding: 0.75em 2.2em;
  border-radius: 99px;
  text-decoration: none;
  box-shadow: 0 0.35em 0.9em rgba(253, 81, 8, 0.35);
  transition: transform 0.15s, background-color 0.2s;
}

.button:hover {
  background: #e44605;
}

.button:active {
  transform: scale(0.96);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(45, 45, 45, 0.55);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal.visible {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  width: calc(var(--card) * 2.7);
  max-width: 90vw;
  padding: calc(var(--card) * 0.24) calc(var(--card) * 0.2);
  background: var(--white);
  border-radius: calc(var(--card) * 0.12);
  border-top: calc(var(--card) * 0.05) solid var(--pwc-orange);
  text-align: center;
  box-shadow: 0 1em 3em rgba(0, 0, 0, 0.3);
  transform: scale(0.85);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.3, 1.3);
}

.modal.visible .modal-content {
  transform: scale(1);
}

.modal-content h2 {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: calc(var(--card) * 0.3);
  color: var(--pwc-black);
}

.modal-content p {
  font-size: calc(var(--card) * 0.115);
  line-height: 1.5;
  color: var(--pwc-grey);
  margin: calc(var(--card) * 0.08) 0 calc(var(--card) * 0.18);
}

.modal-content strong {
  color: var(--pwc-orange);
}

/* ------------------------------------------------------------------ *
 *  Win page
 * ------------------------------------------------------------------ */

.win-screen {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: var(--white);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s, visibility 0.4s;
}

.win-screen.visible {
  opacity: 1;
  visibility: visible;
}

.win-screen:not(.visible) .win-trophy {
  animation: none;
}

#confetti-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 5;
}

.win-container {
  position: relative;
  z-index: 6;
  justify-content: space-evenly;
  text-align: center;
  padding: calc(var(--card) * 0.3) calc(var(--card) * 0.2);
}

.win-page .header-logo {
  height: calc(var(--card) * 0.8);
}

.win-title {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: calc(var(--card) * 0.4);
  color: var(--pwc-orange);
}

.win-text {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: calc(var(--card) * 0.17);
  line-height: 1.4;
  color: var(--pwc-black);
  margin-top: calc(var(--card) * 0.08);
}

.win-text .showtime {
  color: var(--pwc-orange);
  font-weight: 700;
  font-size: 1.2em;
}

.win-meta {
  font-size: calc(var(--card) * 0.115);
  color: var(--pwc-grey);
  margin-top: calc(var(--card) * 0.06);
}

.win-meta .star {
  font-size: 1.15em;
}

.win-trophy {
  height: calc(var(--card) * 2.6);
  max-height: 42vh;
  width: auto;
  animation: bounceZoomIn 0.7s both, wiggle 1.6s 0.8s ease-in-out infinite;
}

.win-page .button {
  font-size: calc(var(--card) * 0.15);
}

/* ------------------------------------------------------------------ *
 *  Animations
 * ------------------------------------------------------------------ */

@keyframes deal {
  from { opacity: 0; transform: translateY(18%) scale(0.85); }
  to   { opacity: 1; transform: none; }
}

@keyframes matched {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.08); }
  70%  { transform: scale(0.97); }
  100% { transform: scale(1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5%); }
  40%, 80% { transform: translateX(5%); }
}

@keyframes tick {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.08); }
}

@keyframes bounceZoomIn {
  0%   { transform: scale(0.5); opacity: 0; }
  60%  { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(1); }
}

@keyframes wiggle {
  0%, 100% { transform: rotate(0deg); }
  25%      { transform: rotate(-4deg); }
  75%      { transform: rotate(4deg); }
}

@media (prefers-reduced-motion: reduce) {
  .card.deal,
  .win-trophy,
  .panel-timer.low .timer-value {
    animation: none;
  }
}