@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700&display=swap");

:root {
  --bg: #f1efeb;
  --panel: #ffffff;
  --panel-2: #f7f5f2;
  --text: #2b2b2b;
  --muted: #6b6863;
  --accent-green: #1aa85c;
  --accent-red: #d7263d;
  --accent-amber: #f5a524;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  --radius: 16px;
}

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

body {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  background: radial-gradient(
    circle at 20% 20%,
    #f6f3ef 0,
    #ece8e1 40%,
    #e4dfd7 80%
  );
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px;
  gap: 24px;
}

header {
  width: min(1100px, 100%);
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

header h1 {
  letter-spacing: 1px;
  font-weight: 700;
}

header h2 {
  color: var(--muted);
  font-weight: 600;
  font-size: 1.05rem;
}

.level-selector {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.level-selector button {
  border: none;
  padding: 10px 16px;
  border-radius: 12px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.12);
  transition:
    transform 150ms ease,
    box-shadow 150ms ease,
    filter 150ms ease;
}

.level-selector button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 24px rgba(0, 0, 0, 0.16);
  filter: brightness(1.05);
}

#reset-btn {
  margin-top: 6px;
  width: 100%;
  border: none;
  background: var(--accent-amber);
  color: #2b2b2b;
  padding: 12px;
  border-radius: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition:
    transform 150ms ease,
    box-shadow 150ms ease,
    filter 150ms ease;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.12);
}

#reset-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 24px rgba(0, 0, 0, 0.16);
  filter: brightness(1.05);
}

#easy-btn {
  background: var(--accent-green);
}

#medium-btn {
  background: var(--accent-amber);
  color: #2b2b2b;
}

#hard-btn {
  background: var(--accent-red);
}

.game-container {
  width: min(1100px, 100%);
  display: flex;
  gap: 16px;
  align-items: stretch;
}

.game-area {
  flex: 1;
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
}

.game-area-title {
  color: var(--accent-red);
  letter-spacing: 0.5px;
}

.game-area h3 {
  color: var(--muted);
  font-weight: 600;
}

.inner-game-area {
  margin-top: 8px;
  border: 2px dashed var(--accent-green);
  border-radius: 12px;
  padding: 32px;
  min-height: 420px;
  display: grid;
  place-items: center;
  background: #fff;
}

.field-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 500px;
}

.color-square {
  background: var(--accent-green);
  aspect-ratio: 1;
  border-radius: 12px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition:
    transform 150ms ease,
    box-shadow 150ms ease,
    filter 150ms ease;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
}

.color-square.changed {
  background: var(--accent-red);
  transform: scale(1.05);
  box-shadow: 0 12px 28px rgba(215, 38, 61, 0.4);
}

.color-square h4 {
  color: #fff;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  text-align: center;
  text-shadow:
    0 1px 6px rgba(245, 165, 36, 0.85),
    0 0 14px rgba(245, 165, 36, 0.6);
}

.color-square:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.16);
  filter: brightness(1.08);
}

.sidebar {
  width: 20vw;
  min-width: 220px;
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  text-align: center;
}

.sidebar h3 {
  margin-bottom: 4px;
}

.sidebar span {
  display: block;
  width: 100%;
  padding: 10px 12px;
  background: var(--panel-2);
  border-radius: 10px;
  font-weight: 600;
  color: var(--text);
}

#clean-btn {
  margin-top: 6px;
  width: 100%;
  border: none;
  background: var(--accent-red);
  color: #fff;
  padding: 12px;
  border-radius: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition:
    transform 150ms ease,
    box-shadow 150ms ease,
    filter 150ms ease;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.12);
}

#clean-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 24px rgba(0, 0, 0, 0.16);
  filter: brightness(1.05);
}

details {
  width: 100%;
  background: var(--panel-2);
  border-radius: 12px;
  padding: 10px 12px;
}

summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--text);
}

details span {
  margin-top: 8px;
}

footer {
  width: min(1100px, 100%);
  text-align: left;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}
.counter-display {
  width: 100%;
  margin-top: 20px;
  padding: 15px;
  background: var(--panel-2);
  border-radius: 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.counter-display h3 {
  color: var(--text);
  font-weight: 600;
  margin: 0;
}

#counter-number {
  color: var(--accent-red);
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0;
}

footer img {
  max-width: 120px;
  margin: 0;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
}

@media (max-width: 900px) {
  .game-container {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    min-width: unset;
  }
}

@media (max-width: 600px) {
  .inner-game-area {
    min-height: 260px;
    padding: 20px;
  }
}

@media (min-width: 1200px) {
  .inner-game-area {
    min-height: 560px;
    padding: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}