:root {
  color-scheme: light;
  --ink: #1e2930;
  --paper: #fffdf7;
  --paper-low: #f6f0e4;
  --green: #277442;
  --blue: #174f88;
  --red: #ed4b39;
  --gold: #f6a51b;
  --table: #e9dfca;
  --table-deep: #d5c8ad;
  --shadow: 0 22px 44px rgba(30, 41, 48, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(30, 41, 48, 0.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(30, 41, 48, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 28% 18%, rgba(246, 165, 27, 0.22), transparent 24rem),
    radial-gradient(circle at 78% 72%, rgba(39, 116, 66, 0.14), transparent 24rem),
    linear-gradient(135deg, var(--table), var(--table-deep));
  background-size: 28px 28px, 28px 28px, auto, auto, auto;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

button {
  color: inherit;
  font: inherit;
}

.app-shell {
  width: min(100vw, 560px);
  height: min(100vh, 820px);
  padding: clamp(18px, 4vw, 34px);
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 18px;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 390px);
  align-items: center;
  justify-content: center;
}

.brand-card {
  width: 100%;
  border: 4px solid var(--ink);
  background: var(--paper);
  box-shadow: 0 5px 0 rgba(30, 41, 48, 0.12), var(--shadow);
}

.brand-band {
  min-height: 76px;
  padding: 10px 14px;
  display: grid;
  grid-template-columns: 48px 26px 1fr 26px 48px;
  align-items: center;
  gap: 12px;
  background: var(--blue);
  color: var(--paper);
}

.brand-pip {
  color: var(--paper);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  text-align: center;
}

.brand-slot {
  width: 48px;
}

h1 {
  margin: 0;
  color: inherit;
  font-size: clamp(2.4rem, 9vw, 4rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: 0;
  text-align: center;
}

.icon-button {
  width: 48px;
  height: 48px;
  border: 3px solid var(--paper);
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: #fffdf7;
  cursor: pointer;
  box-shadow: 0 3px 0 rgba(30, 41, 48, 0.16);
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.icon-button:hover {
  background: #f6f0e4;
}

.icon-button:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 1px 0 rgba(30, 41, 48, 0.16);
}

svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: var(--blue);
  stroke-width: 2.15;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.deck-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 0;
  perspective: 1200px;
  touch-action: pan-y;
}

.deck-shadow {
  position: absolute;
  width: min(76vw, 326px);
  aspect-ratio: 2.5 / 3.5;
  border-radius: 18px;
  border: 3px solid rgba(30, 41, 48, 0.28);
  background:
    linear-gradient(var(--paper), var(--paper-low));
  box-shadow: var(--shadow);
}

.deck-shadow-one {
  transform: translate(14px, 14px) rotate(4deg);
}

.deck-shadow-two {
  transform: translate(-13px, 11px) rotate(-3deg);
}

.card {
  position: relative;
  z-index: 2;
  width: min(76vw, 326px);
  aspect-ratio: 2.5 / 3.5;
  padding: 0;
  border: 0;
  border-radius: 18px;
  background: transparent;
  cursor: grab;
  touch-action: none;
  user-select: none;
  transform: translateX(var(--drag-x, 0px)) rotate(var(--drag-rotation, 0deg));
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.25, 1);
}

.card:active {
  cursor: grabbing;
}

.card.is-moving-left {
  transform: translateX(-120vw) rotate(-18deg);
}

.card.is-moving-right {
  transform: translateX(120vw) rotate(18deg);
}

.card-inner {
  position: absolute;
  inset: 0;
  display: block;
  border-radius: inherit;
  transform-style: preserve-3d;
  transition: transform 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.card.is-flipped .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  display: block;
  overflow: hidden;
  border-radius: inherit;
  border: 4px solid var(--ink);
  backface-visibility: hidden;
  box-shadow: var(--shadow);
}

.card-back {
  display: grid;
  place-items: center;
  background: var(--blue);
}

.back-pattern {
  width: 74%;
  height: 74%;
  border: 5px solid var(--paper);
  border-radius: 12px;
  background:
    repeating-linear-gradient(45deg, rgba(255, 253, 247, 0.22) 0 6px, transparent 6px 14px),
    repeating-linear-gradient(-45deg, rgba(255, 253, 247, 0.2) 0 5px, transparent 5px 13px);
  box-shadow: inset 0 0 0 12px rgba(255, 253, 247, 0.1);
}

.card-front {
  display: grid;
  place-items: stretch;
  background: var(--paper);
  transform: rotateY(180deg);
}

.card-art {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  pointer-events: none;
  -webkit-user-drag: none;
}

@media (max-height: 680px) {
  .app-shell {
    gap: 10px;
    padding-block: 14px;
  }

  h1 {
    font-size: 2rem;
  }

  .card,
  .deck-shadow {
    width: min(58vh, 286px);
  }
}