body {
  margin: 0;
  overflow: hidden;
  background-color: #000;
  user-select: none;
}

#ui-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#crosshair {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  transform: translate(-50%, -50%);
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 50%;
}

#crosshair::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 4px;
  background: red;
  transform: translate(-50%, -50%);
  border-radius: 50%;
}

#score-board {
  position: absolute;
  top: 20px;
  left: 20px;
  color: white;
  font-size: 28px;
  font-family: "Courier New", Courier, monospace;
  font-weight: bold;
  text-shadow: 2px 2px 0 #000;
}
/* 기존 instructions 스타일은 유지하되, 시작 화면이 있으므로 초기엔 숨김 처리될 수 있음 */

#pause-menu {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
}

#pause-menu h1 {
  font-size: 80px;
  font-family: "Impact", sans-serif;
  color: white;
  margin-bottom: 40px;
  letter-spacing: 5px;
  text-shadow: 4px 4px 0px #000;
}

#pause-menu .btn-group {
  align-items: center;
}

#wave-board {
  position: absolute;
  top: 20px;
  right: 20px;
  color: white;
  font-size: 28px;
  font-family: "Courier New", Courier, monospace;
  font-weight: bold;
  text-shadow: 2px 2px 0 #000;
}

#ammo-board {
  position: absolute;
  bottom: 30px;
  right: 20px;
  color: #e67e22;
  font-size: 30px;
  font-family: "Courier New", Courier, monospace;
  font-weight: bold;
  text-shadow: 2px 2px 0 #000;
}

#game-message {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ff4444;
  font-size: 40px;
  font-family: sans-serif;
  font-weight: bold;
  text-shadow: 2px 2px 4px #000;
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}

#game-message.show {
  opacity: 1;
}

#weapon-ui {
  position: absolute;
  bottom: 80px;
  right: 20px;
  display: flex;
  gap: 10px;
}

.weapon-slot {
  width: 40px;
  height: 40px;
  border: 2px solid #5d4037;
  color: #888;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  font-family: "Courier New", Courier, monospace;
  background: rgba(0, 0, 0, 0.8);
  border-radius: 2px;
}

.weapon-slot.active {
  border-color: #c0392b;
  color: #c0392b;
  background: rgba(100, 0, 0, 0.3);
  box-shadow: 0 0 10px rgba(192, 57, 43, 0.5);
}

#status-bars {
  position: absolute;
  bottom: 30px;
  left: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 250px;
}

.bar-container {
  position: relative;
  width: 100%;
  height: 20px;
  background: #1a1a1a;
  border: 2px solid #3e2723;
  border-radius: 0;
}

.bar-container span {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  color: white;
  font-size: 12px;
  font-family: "Courier New", Courier, monospace;
  font-weight: bold;
  z-index: 2;
  text-shadow: 1px 1px 0 #000;
}

#health-bar {
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    #600,
    #600 10px,
    #800 10px,
    #800 20px
  );
  transition: width 0.2s;
}

#stamina-bar {
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    #003,
    #003 10px,
    #005 10px,
    #005 20px
  );
  transition: width 0.1s;
}

.hidden {
  display: none !important;
}

#boss-hud {
  position: absolute;
  top: 50px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  text-align: center;
  pointer-events: none;
}

#boss-name {
  color: #ff0000;
  font-size: 24px;
  font-weight: bold;
  text-shadow: 0 0 5px #000;
  margin-bottom: 5px;
}

#boss-health-container {
  width: 100%;
  height: 20px;
  background: #000;
  border: 4px solid #3e2723;
  border-radius: 0;
}

#boss-health-bar {
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    #800,
    #800 2px,
    #a00 2px,
    #a00 4px
  );
  transition: width 0.2s;
}

#ending-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: black;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  text-align: center;
}

.credits-content {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.credits-list {
  margin-top: 50px;
  animation: scrollCredits 10s linear forwards;
}

@keyframes scrollCredits {
  0% {
    transform: translateY(100vh);
  }
  100% {
    transform: translateY(-100%);
  }
}

#btn-ending-home {
  position: absolute;
  bottom: 50px;
  padding: 15px 30px;
  font-size: 20px;
  background: #fab1a0;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: bold;
  opacity: 0;
  animation: fadeInButton 2s ease-in 8s forwards; /* 크레딧 후 등장 */
  pointer-events: auto;
}

@keyframes fadeInButton {
  to {
    opacity: 1;
  }
}

#game-over-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  z-index: 2500;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #ff4444;
  text-align: center;
  pointer-events: auto;
}

.game-over-content h1 {
  font-size: 80px;
  font-family: "Impact", sans-serif;
  margin-bottom: 20px;
  text-shadow: 0 0 10px #000;
  letter-spacing: 5px;
}

.game-over-content p {
  font-size: 30px;
  color: white;
  margin: 10px 0;
  font-family: sans-serif;
  font-weight: bold;
}

#btn-return-title {
  margin-top: 40px;
  padding: 15px 40px;
  font-size: 24px;
  font-family: sans-serif;
  font-weight: bold;
  border: 2px solid #fff;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  cursor: pointer;
  transition: all 0.3s;
}

#btn-return-title:hover {
  background: #c0392b;
  border-color: #c0392b;
  transform: scale(1.05);
}

/* --- 시작 페이지 스타일 --- */
#start-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3000;
  background-color: #000;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  overflow: hidden;
  padding-left: 10%;
}

.start-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.start-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    circle,
    rgba(0, 0, 0, 0.2) 0%,
    rgba(0, 0, 0, 0.9) 100%
  );
}

.start-content {
  text-align: left;
  color: #fff;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

#main-char-img {
  position: absolute;
  bottom: 0;
  left: auto;
  right: 0%;
  height: 85vh;
  width: auto;
  filter: brightness(0.6);
  z-index: 0;
  pointer-events: none;
}

.game-title {
  font-size: 80px;
  font-family: "Impact", sans-serif;
  color: #c0392b;
  text-shadow: 4px 4px 0px #000;
  margin-bottom: 50px;
  letter-spacing: 5px;
}

.btn-group {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
  position: relative;
  padding-left: 30px;
}

.btn-group::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: white;
  transform: scaleY(0);
  transform-origin: top;
  animation: lineExpand 0.5s ease-out forwards;
}

.btn-main,
.btn-sub {
  padding: 10px 0;
  font-size: 30px;
  font-family: sans-serif;
  font-weight: bold;
  border: none;
  background: transparent;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s;
  width: auto;
  opacity: 0;
  transform: translateX(-30px);
  animation: btnSlideIn 0.5s ease-out forwards;
  position: relative;
  transform-origin: left center;
  text-align: left;
}

/* 버튼 애니메이션 딜레이 (순차적 등장) */
#btn-pc-start {
  animation-delay: 0.1s;
}
#btn-mobile-start {
  animation-delay: 0.2s;
}
#btn-howto {
  animation-delay: 0.3s;
}
#btn-exit {
  animation-delay: 0.4s;
}

@keyframes lineExpand {
  to {
    transform: scaleY(1);
  }
}

@keyframes btnSlideIn {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.btn-main:hover,
.btn-sub:hover {
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
  transform: scale(1.1);
}

.btn-main::after,
.btn-sub::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background-color: #fff;
  transition: width 0.3s ease;
}

.btn-main:hover::after,
.btn-sub:hover::after {
  width: 100%;
}

/* --- 모달 스타일 --- */
#howto-modal {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 3500;
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-content {
  background: #222;
  padding: 40px;
  border: 2px solid #c0392b;
  color: #fff;
  max-width: 600px;
  text-align: center;
  font-family: sans-serif;
}

.modal-content h2 {
  color: #c0392b;
  margin-bottom: 20px;
}
.modal-content ul {
  text-align: left;
  margin: 20px 0;
  line-height: 1.6;
}
.modal-content button {
  padding: 10px 30px;
  background: #c0392b;
  border: none;
  color: white;
  font-weight: bold;
  cursor: pointer;
}

/* --- 모바일 컨트롤 UI --- */
#mobile-controls {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  pointer-events: none; /* 터치 통과 (개별 버튼만 이벤트 받음) */
}

#joystick-zone {
  position: absolute;
  bottom: 50px;
  left: 50px;
  width: 150px;
  height: 150px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  pointer-events: auto;
  touch-action: none;
}

#joystick-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

#mobile-actions {
  position: absolute;
  bottom: 50px;
  right: 50px;
  display: flex;
  gap: 20px;
  pointer-events: auto;
}

#mobile-actions button,
#btn-m-pause {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.5);
  background: rgba(0, 0, 0, 0.5);
  color: white;
  font-weight: bold;
  font-size: 14px;
  pointer-events: auto;
  touch-action: none;
}

#mobile-actions button:active {
  background: rgba(255, 255, 255, 0.3);
}
#btn-m-run.active {
  background: rgba(255, 255, 0, 0.5);
  color: black;
}

#btn-m-pause {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  font-size: 18px;
}