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

:root {
  --bg-primary: #3a302a;
  --bg-secondary: #5e5046;
  --bg-tertiary: #a18f7e;
  --accent-primary: #e0a899;
  --accent-secondary: #b0d08b;
  --text-primary: #fdfaf6;
  --text-secondary: #c0b4a8;
  --border-color: rgba(176, 208, 139, 0.5);
  --shadow-color: rgba(0, 0, 0, 0.55);
  --gauge-bg: #4f433b;
  --gauge-fill: linear-gradient(90deg, #b0d08b, #95b86f);
  --button-bg: linear-gradient(135deg, var(--accent-primary), #c89587);
  --button-hover-bg: linear-gradient(135deg, #f8c8b9, #e0a899);
  --stat-bg: rgba(94, 80, 70, 0.88);
  --text-dark: #3a302a;

  --font-family: "Noto Sans KR", sans-serif;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --container-max-width: 850px;
  --transition-speed: 0.3s;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  padding: 25px 15px;
  line-height: 1.6;
}

.game-container {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  padding: 30px 35px;
  box-shadow: 0 12px 35px var(--shadow-color);
  width: 100%;
  max-width: var(--container-max-width);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.game-container::before,
.game-container::after {
  content: "";
  position: absolute;
  width: 50px;
  height: 50px;
  border-style: solid;
  border-color: var(--accent-secondary);
  opacity: 0.5;
  pointer-events: none;
}
.game-container::before {
  top: -10px;
  left: -10px;
  border-width: 2px 0 0 2px;
  border-top-left-radius: var(--border-radius-lg);
}
.game-container::after {
  bottom: -10px;
  right: -10px;
  border-width: 0 2px 2px 0;
  border-bottom-right-radius: var(--border-radius-lg);
}

.game-header {
  text-align: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.game-title {
  font-size: 2.8em;
  font-weight: 700;
  color: var(--accent-secondary);
  margin-bottom: 8px;
  text-shadow: 0 0 8px rgba(176, 208, 139, 0.4);
  letter-spacing: 1px;
}

.game-subtitle {
  font-size: 1.1em;
  color: var(--text-secondary);
  opacity: 0.95;
}

.survival-gauge-container {
  display: flex;
  align-items: center;
  margin-bottom: 30px;
  background-color: var(--stat-bg);
  padding: 12px 18px;
  border-radius: var(--border-radius-md);
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
}

.survival-gauge-label {
  font-size: 1.8em;
  margin-right: 12px;
  filter: drop-shadow(0 0 3px var(--accent-secondary));
}

.survival-gauge-bar-wrapper {
  flex-grow: 1;
  height: 18px;
  background-color: var(--gauge-bg);
  border-radius: 9px;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.3);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5);
}

#survivalGaugeBar {
  height: 100%;
  width: 0%;
  background: var(--gauge-fill);
  border-radius: 9px 0 0 9px;
  transition: width var(--transition-speed) ease-out;
  box-shadow: 0 0 8px rgba(176, 208, 139, 0.4);
}

.total-playtime {
  margin-left: 18px;
  font-size: 1.2em;
  font-weight: bold;
  color: var(--accent-secondary);
  min-width: 90px;
  text-align: right;
  display: flex;
  align-items: center;
  gap: 5px;
}
.total-playtime span {
  filter: drop-shadow(0 0 3px var(--accent-secondary));
}

.game-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 18px;
  margin-bottom: 30px;
  text-align: center;
}

.stat-item {
  background-color: var(--stat-bg);
  padding: 18px 12px;
  border-radius: var(--border-radius-md);
  box-shadow: 0 5px 12px var(--shadow-color);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    to right,
    rgba(253, 250, 246, 0) 0%,
    rgba(253, 250, 246, 0.1) 50%,
    rgba(253, 250, 246, 0) 100%
  );
  transform: skewX(-25deg);
  transition: left var(--transition-speed) ease;
  pointer-events: none;
}

.stat-item:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 9px 18px var(--shadow-color);
}
.stat-item:hover::before {
  left: 130%;
}

.stat-value {
  font-size: 2.4em;
  font-weight: 700;
  color: var(--accent-secondary);
  margin-bottom: 5px;
  line-height: 1.1;
  text-shadow: 0 0 6px rgba(176, 208, 139, 0.5);
}

.stat-label {
  font-size: 0.95em;
  color: var(--text-secondary);
  margin-bottom: 4px;
  font-weight: 400;
}

.stat-max {
  font-size: 0.8em;
  color: var(--text-secondary);
  opacity: 0.8;
}

.simulation-container {
  margin-bottom: 30px;
  border: 3px solid var(--accent-secondary);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background-color: #2e2520;
  box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.7),
    0 0 10px rgba(176, 208, 139, 0.2);
  position: relative;
}

#simulationCanvas {
  display: block;
  width: 100%;
  aspect-ratio: 800 / 600;
  background-color: transparent;
}

.game-controls {
  display: flex;
  justify-content: center;
  gap: 25px;
  margin-bottom: 35px;
}

.control-button {
  background: var(--button-bg);
  color: var(--text-dark);
  border: none;
  border-radius: 50px;
  padding: 14px 30px;
  font-size: 1.15em;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 5px 15px rgba(224, 168, 153, 0.3),
    inset 0 -2px 3px rgba(0, 0, 0, 0.2);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
}

.control-button:hover {
  background: var(--button-hover-bg);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 20px rgba(224, 168, 153, 0.4),
    inset 0 -1px 2px rgba(0, 0, 0, 0.1);
}

.control-button:active {
  transform: translateY(0px) scale(1);
  box-shadow: 0 3px 10px rgba(224, 168, 153, 0.2),
    inset 0 1px 3px rgba(0, 0, 0, 0.3);
}

.button-icon {
  font-size: 1.3em;
  filter: drop-shadow(0 0 3px rgba(60, 45, 40, 0.4));
  transition: transform var(--transition-speed) ease;
}
.control-button:hover .button-icon {
  transform: scale(1.1) rotate(-5deg);
}

.game-instructions {
  background-color: var(--bg-tertiary);
  padding: 25px 30px;
  border-radius: var(--border-radius-md);
  margin-bottom: 30px;
  border: 1px solid var(--border-color);
  box-shadow: 0 5px 10px var(--shadow-color);
}

.instructions-title {
  color: var(--text-dark);
  margin-bottom: 18px;
  text-align: center;
  font-size: 1.5em;
  font-weight: 700;
  text-shadow: 0 1px 1px rgba(255, 255, 255, 0.15);
}

.instructions-list {
  list-style: none;
  padding-left: 0;
}

.instructions-list li {
  margin-bottom: 12px;
  padding-left: 30px;
  position: relative;
  color: var(--text-dark);
  font-size: 0.95em;
}

.instructions-list li::before {
  content: "🪱";
  position: absolute;
  left: 5px;
  top: 1px;
  color: var(--accent-primary);
  font-size: 1.2em;
  line-height: 1;
  opacity: 0.9;
}

.app-footer {
  text-align: center;
  margin-top: 35px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.9em;
  color: var(--text-secondary);
  opacity: 0.85;
}

.app-footer a {
  color: var(--accent-secondary);
  text-decoration: none;
  font-weight: bold;
  transition: color var(--transition-speed) ease,
    text-shadow var(--transition-speed) ease;
}

.app-footer a:hover {
  color: #c8e8a8;
  text-decoration: none;
  text-shadow: 0 0 5px var(--accent-secondary);
}

.hidden {
  display: none !important;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-speed) ease,
    visibility 0s var(--transition-speed);
}
#restartButton {
  transition: opacity var(--transition-speed) ease, visibility 0s linear,
    transform var(--transition-speed) ease;
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}
#restartButton.hidden {
  opacity: 0;
  visibility: hidden;
  transform: scale(0.8);
}

@media (max-width: 768px) {
  body {
    padding: 15px 10px;
  }
  .game-container {
    padding: 20px 25px;
  }
  .game-title {
    font-size: 2.4em;
  }
  .game-stats {
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 15px;
  }
  .stat-value {
    font-size: 2em;
  }
  .game-controls {
    gap: 15px;
  }
  .control-button {
    padding: 12px 25px;
    font-size: 1.05em;
  }
  .instructions-title {
    font-size: 1.3em;
  }
}

@media (max-width: 480px) {
  body {
    padding: 10px 5px;
  }
  .game-container {
    padding: 15px;
  }
  .game-title {
    font-size: 2em;
  }
  .game-subtitle {
    font-size: 1em;
  }
  .survival-gauge-container {
    padding: 10px 12px;
    flex-wrap: wrap;
  }
  .total-playtime {
    margin-left: 0;
    margin-top: 8px;
    width: 100%;
    text-align: center;
  }
  .game-stats {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
  }
  .stat-item {
    padding: 12px 8px;
  }
  .stat-value {
    font-size: 1.6em;
  }
  .stat-label {
    font-size: 0.85em;
  }
  .game-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .control-button {
    width: 100%;
    justify-content: center;
  }
  .game-instructions {
    padding: 20px 15px;
  }
  .instructions-list li {
    padding-left: 25px;
    font-size: 0.9em;
    color: var(--text-dark);
  }
  .instructions-list li::before {
    left: 0;
  }
  .app-footer {
    margin-top: 25px;
    padding-top: 15px;
  }
}