:root {
  --mc-green: #3c8527;
  --mc-green-hover: #4ea833;
  --mc-green-active: #255716;
  --mc-green-glow: rgba(78, 168, 51, 0.45);
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-cinematic: cubic-bezier(0.22, 1, 0.36, 1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: #050507;
  color: #ffffff;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}

/* 全螢幕三欄手風琴 */
.split-launcher {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  width: 100vw;
  height: 100vh;
  transition: grid-template-columns 0.65s var(--ease-cinematic);
  will-change: grid-template-columns;
  background-color: #000;
}

.split-launcher:has(.version-panel:nth-child(1):hover) {
  grid-template-columns: 2.2fr 0.9fr 0.9fr;
}
.split-launcher:has(.version-panel:nth-child(2):hover) {
  grid-template-columns: 0.9fr 2.2fr 0.9fr;
}
.split-launcher:has(.version-panel:nth-child(3):hover) {
  grid-template-columns: 0.9fr 0.9fr 2.2fr;
}

.version-panel {
  position: relative;
  height: 100%;
  overflow: hidden;
  cursor: pointer;
  border-right: 2px solid rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transform: translateZ(0);
}

.version-panel:last-child {
  border-right: none;
}

.panel-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  image-rendering: auto;
  image-rendering: -webkit-optimize-contrast;
  filter: brightness(0.65) contrast(1.1) saturate(0.9);
  transform: scale(1.02) translateZ(0);
  transition: transform 0.8s var(--ease-cinematic), filter 0.6s ease;
  will-change: transform, filter;
  z-index: 1;
}

.panel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(5, 5, 8, 0.15) 0%,
    rgba(5, 5, 8, 0.4) 45%,
    rgba(5, 5, 8, 0.92) 100%
  );
  z-index: 2;
  transition: background 0.6s ease;
}

.version-panel:hover .panel-bg {
  filter: brightness(1) contrast(1.15) saturate(1.2);
  transform: scale(1.08) translateZ(0);
}

.version-panel:hover .panel-overlay {
  background: linear-gradient(
    180deg,
    rgba(5, 5, 8, 0.05) 0%,
    rgba(5, 5, 8, 0.25) 40%,
    rgba(5, 5, 8, 0.85) 100%
  );
}

.panel-content {
  position: relative;
  z-index: 10;
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transform: translateY(16px) translateZ(0);
  transition: transform 0.5s var(--ease-cinematic);
  will-change: transform;
}

.version-panel:hover .panel-content {
  transform: translateY(0) translateZ(0);
}

.panel-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.version-title {
  font-size: 32px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.5px;
  text-shadow: 0 4px 12px rgba(0,0,0,0.8);
  line-height: 1.2;
}

.version-subtitle {
  font-size: 16px;
  font-weight: 500;
  color: #d1d1de;
  text-shadow: 0 2px 8px rgba(0,0,0,0.8);
}

.play-btn-wrapper {
  margin-top: 8px;
}

.mc-play-btn {
  width: 100%;
  max-width: 320px;
  background-color: var(--mc-green);
  color: #ffffff;
  border: 2px solid #5bb33b;
  border-bottom: 4px solid #1e4d12;
  box-shadow: 0 8px 24px rgba(0,0,0,0.6);
  padding: 15px 20px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-shadow: 1px 2px 2px rgba(0, 0, 0, 0.6);
  position: relative;
  transition: background-color 0.2s ease, box-shadow 0.2s ease, transform 0.1s ease;
}

.mc-play-btn:hover {
  background-color: var(--mc-green-hover);
  border-color: #6ed149;
  box-shadow: 0 0 30px var(--mc-green-glow);
}

.mc-play-btn:active {
  transform: translateY(2px);
  border-bottom-width: 2px;
  background-color: var(--mc-green-active);
}

/* 彈窗遮罩與通用樣式 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  z-index: 1000;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: #141417;
  border: 1px solid #2f2f38;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9);
  width: 90%;
  max-width: 560px;
  padding: 30px;
  transform: scale(0.95);
  transition: transform 0.25s var(--ease-spring);
}

.modal-overlay.active .modal-box {
  transform: scale(1);
}

.modal-box h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #55ff55;
  border-bottom: 1px solid #262630;
  padding-bottom: 10px;
}

.modal-desc-box {
  color: #d1d1de;
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 22px;
  white-space: pre-line;
  text-align: left;
  background: #09090c;
  padding: 16px;
  border: 1px solid #202026;
  max-height: 320px;
  overflow-y: auto;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
}

.modal-close-btn {
  background: #24242c;
  border: 1px solid #3d3d49;
  color: #fff;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.modal-close-btn:hover {
  background: #363642;
  border-color: #555566;
}

/* 進入遊戲動作綠色按鈕 */
.launch-action-btn {
  background: var(--mc-green) !important;
  border: 1px solid #5bb33b !important;
  color: #fff !important;
  font-weight: 700 !important;
  box-shadow: 0 0 15px rgba(60, 133, 39, 0.4);
}

.launch-action-btn:hover {
  background: var(--mc-green-hover) !important;
  border-color: #6ed149 !important;
  box-shadow: 0 0 25px rgba(78, 168, 51, 0.6);
}

/* 安全提醒專用樣式 */
.notice-box {
  max-width: 480px;
  text-align: center;
  border: 1px solid #5a3d1c;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.95), 0 0 30px rgba(255, 170, 0, 0.15);
}

.notice-icon {
  font-size: 36px;
  color: #ffaa00;
  margin-bottom: 12px;
}

.notice-title {
  color: #ffaa00 !important;
  border-bottom-color: #382915 !important;
  font-size: 20px;
}

.notice-desc {
  text-align: center;
  font-size: 15px;
  color: #e2e2ea;
  border-color: #382915;
  background: #110e0a;
}

.notice-btn {
  background: #ffaa00;
  color: #000;
  border: 1px solid #ffcc66;
  font-weight: 700;
}

.notice-btn:hover {
  background: #ffbb33;
  border-color: #fff;
}