:root {
  --page: #0f172a;
  --panel: #111827;
  --panel-soft: #1e293b;
  --tile: #111827;
  --tile-border: #334155;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --green: #10b981;
  --yellow: #f59e0b;
  --gray: #1e293b;
  --danger: #ef4444;
  --focus: #38bdf8;
  --tile-size: min(15.2vw, 3.85rem);
  --board-gap: min(1.45vw, 0.42rem);
  --board-width: calc(var(--tile-size) * 5 + var(--board-gap) * 4);
  --action-key-width: clamp(4.2rem, 16vw, 5.6rem);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.12), transparent 24rem),
    linear-gradient(180deg, #111c33 0%, var(--page) 52%, #08111f 100%);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

.loader {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: #0f172a;
  opacity: 1;
  transition: opacity 500ms ease;
}

.loader--hidden {
  opacity: 0;
  pointer-events: none;
}

.loader__content {
  width: min(100%, 34rem);
  display: grid;
  gap: 0.85rem;
  place-items: center;
  text-align: center;
  animation: pulse 2000ms ease-in-out infinite;
}

.loader__logo-wrap {
  width: min(72vw, 15rem);
  min-height: 4.75rem;
  display: grid;
  place-items: center;
}

.loader__logo {
  display: block;
  max-width: 100%;
  height: auto;
}

.loader__title {
  margin: 0;
  color: #ffffff;
  font-size: clamp(1.35rem, 5.2vw, 2.3rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
  text-transform: uppercase;
}

.loader__subtitle {
  margin: 0;
  color: rgba(16, 185, 129, 0.8);
  font-size: clamp(0.92rem, 3vw, 1.1rem);
  font-weight: 600;
  line-height: 1.3;
}

button,
input {
  font: inherit;
}

.app {
  width: min(100%, 32rem);
  min-height: 100svh;
  margin: 0 auto;
  padding: clamp(0.45rem, 1.6vh, 0.8rem) 0.65rem 0.8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 0.55rem;
}

.masthead {
  width: min(100%, var(--board-width));
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  text-align: center;
}

.main-logo {
  display: block;
  width: 100%;
  max-width: var(--board-width);
  height: auto;
  margin: 0 auto;
}

.message {
  width: 100%;
  max-width: var(--board-width);
  min-height: 1.9rem;
  margin: 0;
  padding: 0.2rem 0.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: rgba(203, 213, 225, 0.84);
  text-align: center;
  font-size: 0.92rem;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.message--intro,
.message--strong,
.message--error {
  color: rgba(167, 243, 208, 0.9);
  animation: fadeIn 0.8s ease-out forwards;
}

.board {
  position: relative;
  width: var(--board-width);
  display: grid;
  grid-template-columns: repeat(5, var(--tile-size));
  grid-template-rows: repeat(6, var(--tile-size));
  gap: var(--board-gap);
  justify-content: center;
}

.tile {
  position: relative;
  z-index: 1;
  width: var(--tile-size);
  height: var(--tile-size);
  display: grid;
  place-items: center;
  border: 2px solid var(--tile-border);
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.78);
  color: var(--text);
  font-size: clamp(1.45rem, 7.1vw, 2.15rem);
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
  transform-style: preserve-3d;
  transition:
    border-color 140ms ease,
    background-color 180ms ease,
    transform 420ms ease;
}

.tile--filled {
  border-color: #64748b;
  transform: scale(1.04);
}

.tile--flip {
  animation: flip 620ms ease both;
}

.tile--correct {
  background: var(--green);
  border-color: var(--green);
  color: #ffffff;
}

.tile--present {
  background: var(--yellow);
  border-color: var(--yellow);
  color: #ffffff;
}

.tile--absent {
  background: var(--gray);
  border-color: var(--gray);
  color: #94a3b8;
}

.victory-tile {
  background-image: url("../img/victory-hydra.webp");
  background-size: 500% 600%;
  background-repeat: no-repeat;
  background-color: transparent;
  color: var(--victory-text-color, var(--text));
  border-color: var(--victory-border-color, var(--tile-border));
  box-shadow: inset 0 0 0 999px var(--victory-cover-color, transparent);
  transform: rotateX(0deg);
  transform-origin: center center;
  backface-visibility: hidden;
  animation: hydraReveal 720ms ease-in-out forwards;
}

.board--shake {
  animation: shake 420ms ease;
}

.controls {
  min-height: 2.15rem;
  display: grid;
  place-items: center;
}

.ghost-button {
  min-height: 2.1rem;
  padding: 0.36rem 0.75rem;
  border: 1px solid rgba(203, 213, 225, 0.32);
  border-radius: 8px;
  background: rgba(15, 23, 42, 0.45);
  color: var(--muted);
  cursor: pointer;
  transition:
    border-color 150ms ease,
    color 150ms ease,
    transform 150ms ease;
}

.ghost-button:hover {
  border-color: rgba(248, 250, 252, 0.72);
  color: var(--text);
}

.ghost-button:active {
  transform: translateY(1px);
}

.keyboard {
  width: 100%;
  display: grid;
  gap: 0.42rem;
  touch-action: manipulation;
}

.key-row {
  width: 100%;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  gap: 0.28rem;
}

.key-row--middle {
  grid-template-columns: repeat(9, minmax(0, 1fr)) 1.5fr;
}

.key-row--bottom {
  grid-template-columns: repeat(7, minmax(0, 1fr)) 2.5fr;
}

.key {
  height: clamp(2.7rem, 8.7vh, 3.55rem);
  min-width: 0;
  flex: 1 1 0;
  border: 0;
  border-radius: 6px;
  background: #475569;
  color: var(--text);
  font-size: clamp(0.86rem, 3.3vw, 1.02rem);
  font-weight: 800;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    transform 110ms ease;
}

.key--wide {
  flex: 1.55 1 0;
  font-size: clamp(0.72rem, 2.7vw, 0.9rem);
}

.key--action {
  font-weight: bold;
  min-width: var(--action-key-width);
  transition: transform 0.1s, filter 0.1s;
}

.key-row--middle .key--delete {
  min-width: 0;
}

.key-row--bottom .key--enter {
  min-width: 0;
}

.key--enter {
  background-color: #2f855a !important;
  color: #f0fff4;
  border: 1px solid #48bb78;
  box-shadow: 0 0 10px rgba(72, 187, 120, 0.3);
}

.key--delete {
  background-color: #2d3748 !important;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.key--action:active {
  transform: scale(0.95);
  filter: brightness(1.2);
}

.key:hover {
  background: #64748b;
}

.key:active {
  transform: translateY(1px);
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(0.95);
  }

  50% {
    transform: scale(1.05);
  }
}

@keyframes breathe {
  0% {
    filter: drop-shadow(0 0 4px rgba(0, 255, 128, 0.16));
  }

  50% {
    filter: drop-shadow(0 0 10px rgba(0, 255, 128, 0.34));
  }

  100% {
    filter: drop-shadow(0 0 4px rgba(0, 255, 128, 0.16));
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.key.correct,
.key--correct {
  background: var(--green);
  color: #ffffff;
  opacity: 1;
}

.key.present,
.key--present {
  background: var(--yellow);
  color: #ffffff;
  opacity: 1;
}

.key.absent,
.key--absent {
  background: var(--page);
  color: #64748b;
  opacity: 0.28;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

@keyframes flip {
  0% {
    transform: rotateX(0deg);
  }

  45% {
    transform: rotateX(90deg);
  }

  100% {
    transform: rotateX(0deg);
  }
}

@keyframes hydraReveal {
  0% {
    transform: rotateX(0deg);
    color: var(--victory-text-color, var(--text));
    border-color: var(--victory-border-color, var(--tile-border));
    box-shadow: inset 0 0 0 999px var(--victory-cover-color, transparent);
  }

  49% {
    transform: rotateX(90deg);
    color: var(--victory-text-color, var(--text));
    border-color: var(--victory-border-color, var(--tile-border));
    box-shadow: inset 0 0 0 999px var(--victory-cover-color, transparent);
  }

  50% {
    transform: rotateX(-90deg);
    color: transparent;
    border-color: var(--tile-border);
    box-shadow: inset 0 0 0 999px transparent;
  }

  100% {
    transform: rotateX(0deg);
    color: transparent;
    border-color: var(--tile-border);
    box-shadow: inset 0 0 0 999px transparent;
  }
}


@keyframes shake {
  10%,
  90% {
    transform: translateX(-1px);
  }

  20%,
  80% {
    transform: translateX(2px);
  }

  30%,
  50%,
  70% {
    transform: translateX(-4px);
  }

  40%,
  60% {
    transform: translateX(4px);
  }
}

@media (max-height: 680px) {
  :root {
    --tile-size: min(13.6vw, 3.2rem);
  }

  .app {
    gap: 0.35rem;
    padding-top: 0.5rem;
  }

  .key {
    height: clamp(2.25rem, 8.3vh, 3rem);
  }
}

@media (max-width: 640px) {
  .main-logo {
    max-width: 160px;
  }
}