:root {
  --bg: #18201d;
  --panel: #222b27;
  --input: #151b18;
  --text: #e8e1d5;
  --muted: #aaa092;
  --line: #3a4740;
  --accent: #9aaa7c;
  --accent-strong: #c4cf99;
  --correct: #a9c59a;
  --wrong: #d08a78;
  --glow: rgba(196, 207, 153, 0.16);
  --shadow: rgba(4, 8, 6, 0.28);
  --number-font: Verdana, "Segoe UI", Arial, sans-serif;
  --soft-outline:
    0 1px 0 rgba(24, 32, 29, 0.7),
    0 0 0.65rem rgba(232, 225, 213, 0.1);
  --soft-number-outline:
    0 1px 0 rgba(24, 32, 29, 0.85),
    0 0 0.9rem rgba(232, 225, 213, 0.12);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -6rem, rgba(196, 207, 153, 0.18), transparent 34rem),
    radial-gradient(circle at 14% 70%, rgba(154, 170, 124, 0.08), transparent 18rem),
    linear-gradient(135deg, rgba(232, 225, 213, 0.035) 0 1px, transparent 1px 10px),
    var(--bg);
  color: var(--text);
  font-family: Verdana, "Segoe UI", Arial, sans-serif;
  letter-spacing: 0;
}

button {
  font: inherit;
}

.app {
  width: min(100%, 45rem);
  min-height: 100dvh;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2rem);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 1.05rem;
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.hud > div {
  position: relative;
  overflow: hidden;
  min-height: 4.5rem;
  padding: 0.8rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(232, 225, 213, 0.035), transparent 58%),
    rgba(34, 43, 39, 0.88);
  box-shadow:
    0 0.9rem 1.8rem var(--shadow),
    inset 0 1px 0 rgba(232, 225, 213, 0.05);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hud > div::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 0.22rem;
  background: linear-gradient(180deg, transparent, rgba(196, 207, 153, 0.55), transparent);
  opacity: 0.7;
}

.label {
  color: var(--muted);
  font-family: Verdana, "Segoe UI", Arial, sans-serif;
  font-size: clamp(0.78rem, 1.9vw, 0.95rem);
  font-weight: 600;
}

strong {
  display: block;
  color: var(--text);
  font-family: var(--number-font);
  font-size: clamp(1.25rem, 4.5vw, 2rem);
  font-weight: 700;
  line-height: 1;
  text-shadow: var(--soft-outline);
}

.level-control {
  display: grid;
  grid-template-columns: 2rem 1fr 2rem;
  align-items: center;
  gap: 0.35rem;
}

.level-control button {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(154, 170, 124, 0.14);
  color: var(--text);
  cursor: pointer;
  font-family: var(--number-font);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  box-shadow: inset 0 1px 0 rgba(232, 225, 213, 0.05);
}

.level-control button:disabled {
  color: var(--muted);
  cursor: default;
  opacity: 0.45;
}

.stage {
  min-height: 19rem;
  padding: clamp(1rem, 3vw, 1.6rem);
  border: 1px solid rgba(58, 71, 64, 0.78);
  border-radius: 26px;
  background:
    radial-gradient(circle at 50% 24%, rgba(196, 207, 153, 0.08), transparent 17rem),
    linear-gradient(180deg, rgba(232, 225, 213, 0.028), rgba(21, 27, 24, 0.14));
  box-shadow:
    0 1.2rem 2.2rem var(--shadow),
    inset 0 1px 0 rgba(232, 225, 213, 0.04);
  display: grid;
  align-content: center;
  justify-items: center;
  text-align: center;
  position: relative;
}

h1 {
  min-height: 1.05em;
  margin: 0;
  color: var(--text);
  font-family: var(--number-font);
  font-size: clamp(2.75rem, 12.5vw, 6.8rem);
  font-weight: 700;
  line-height: 1;
  text-shadow: var(--soft-number-outline);
}

.answer {
  width: min(100%, 22rem);
  min-height: 4.35rem;
  margin-top: 1rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(232, 225, 213, 0.025), transparent),
    var(--input);
  color: var(--text);
  font-family: var(--number-font);
  font-size: clamp(2.5rem, 10vw, 5rem);
  font-weight: 700;
  line-height: 1;
  text-shadow: var(--soft-number-outline);
  box-shadow:
    inset 0 0.45rem 1rem rgba(0, 0, 0, 0.1),
    0 0.8rem 1.6rem rgba(4, 8, 6, 0.2);
  overflow: hidden;
  text-overflow: ellipsis;
}

.message {
  min-height: 1.4rem;
  margin: 0;
  color: var(--muted);
  font-family: "Trebuchet MS", "Segoe UI", Arial, sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.45;
}

.guide {
  width: min(100%, 31rem);
  margin-top: 1.2rem;
  display: grid;
  grid-template-columns: 4.75rem 1fr;
  align-items: end;
  gap: 0.75rem;
}

.bust {
  width: 4.75rem;
  height: 5.7rem;
  display: grid;
  place-items: end center;
  filter: drop-shadow(0 0.7rem 0.9rem rgba(0, 0, 0, 0.24));
}

.bust svg {
  width: 100%;
  height: 100%;
  display: block;
}

.guide .message {
  position: relative;
  min-height: 3.25rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(196, 207, 153, 0.42);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(232, 225, 213, 0.12), rgba(232, 225, 213, 0.04)),
    rgba(58, 71, 64, 0.84);
  box-shadow:
    0 0.8rem 1.4rem rgba(4, 8, 6, 0.2),
    inset 0 1px 0 rgba(232, 225, 213, 0.04);
  display: flex;
  align-items: center;
  text-align: left;
}

.guide .message::before {
  content: "";
  position: absolute;
  left: -0.52rem;
  bottom: 1rem;
  width: 0.9rem;
  height: 0.9rem;
  border-left: 1px solid rgba(196, 207, 153, 0.42);
  border-bottom: 1px solid rgba(196, 207, 153, 0.42);
  background: rgba(58, 71, 64, 0.84);
  transform: rotate(45deg);
}

.controls {
  display: grid;
  gap: 0.8rem;
}

.start-button,
.keypad button {
  min-height: 3.35rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(232, 225, 213, 0.035), rgba(0, 0, 0, 0.04)),
    var(--panel);
  color: var(--text);
  cursor: pointer;
  box-shadow:
    0 0.65rem 1.15rem rgba(4, 8, 6, 0.18),
    inset 0 1px 0 rgba(232, 225, 213, 0.05);
  transition: border-color 140ms ease, background 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}

.start-button {
  background:
    linear-gradient(180deg, rgba(196, 207, 153, 0.15), rgba(154, 170, 124, 0.09)),
    rgba(154, 170, 124, 0.16);
  border-color: rgba(196, 207, 153, 0.5);
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 700;
}

.keypad {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.keypad button[data-key="0"] {
  grid-column: span 2;
}

.keypad button {
  font-family: var(--number-font);
  font-size: 1.6rem;
  font-weight: 700;
  text-shadow: var(--soft-outline);
}

.level-control button:hover:not(:disabled),
.start-button:hover,
.keypad button:hover {
  border-color: rgba(196, 207, 153, 0.56);
  box-shadow:
    0 0.8rem 1.35rem rgba(4, 8, 6, 0.2),
    0 0 0 1px rgba(196, 207, 153, 0.06),
    inset 0 1px 0 rgba(232, 225, 213, 0.06);
}

.level-control button:focus-visible,
.start-button:focus-visible,
.keypad button:focus-visible {
  outline: 3px solid rgba(196, 207, 153, 0.34);
  outline-offset: 3px;
}

.keypad button:active,
.start-button:active {
  transform: translateY(1px) scale(0.995);
}

.app[data-state="correct"] .stage {
  animation: correct-flash 260ms ease-out;
}

.app[data-state="wrong"] .stage {
  animation: wrong-flash 260ms ease-out;
}

.app[data-state="level-up"] .stage {
  animation: level-flash 420ms ease-out;
}

.hot {
  color: var(--accent-strong);
  text-shadow: 0 0 1rem rgba(196, 207, 153, 0.22);
}

@keyframes correct-flash {
  0% { border-color: rgba(169, 197, 154, 0.72); box-shadow: 0 0 0 3px rgba(169, 197, 154, 0.08), 0 1.2rem 2.2rem var(--shadow); }
  100% { border-color: var(--line); box-shadow: 0 1.2rem 2.2rem var(--shadow), inset 0 1px 0 rgba(232, 225, 213, 0.04); }
}

@keyframes wrong-flash {
  0% { background: rgba(208, 138, 120, 0.08); border-color: rgba(208, 138, 120, 0.62); }
  100% { background: transparent; border-color: var(--line); }
}

@keyframes level-flash {
  0% { background: rgba(109, 146, 116, 0.18); }
  100% { background: transparent; }
}

@media (max-width: 34rem) {
  .app {
    gap: 0.85rem;
    padding: 0.85rem;
  }

  .hud > div {
    min-height: 3.7rem;
    padding: 0.55rem;
  }

  .stage {
    min-height: 15.25rem;
    border-radius: 22px;
  }

  .guide {
    grid-template-columns: 3.85rem 1fr;
    gap: 0.55rem;
  }

  .bust {
    width: 3.85rem;
    height: 4.65rem;
  }

  .guide .message {
    min-height: 3rem;
    padding: 0.75rem 0.85rem;
    font-size: 0.88rem;
  }

  .start-button,
  .keypad button {
    min-height: 3rem;
  }
}