:root {
  --rc-miku-bg: #ffffff;
  --rc-miku-overlay-color: rgba(0, 0, 0, 0.65);
  --rc-miku-primary: #3dcc85;
  --rc-miku-primary-hover: #34b374;
  --rc-miku-text: #606060;
  --rc-miku-danger: #f00;
  --rc-miku-close-idle: #a0a0a0;
  --rc-miku-close-hover: #333333;
  --rc-miku-radius: 10px;
  --rc-miku-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.rc-miku-overlay {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  background: var(--rc-miku-overlay-color);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  opacity: 0;
  backdrop-filter: blur(4px);
  padding: 20px;
}

.rc-miku-overlay.show {
  display: flex;
}

.rc-miku-overlay.active {
  opacity: 1;
}

.rc-miku-popup {
  background: var(--rc-miku-bg);
  width: 100%;
  max-width: 624px;
  max-height: calc(100vh - 40px);
  border-radius: var(--rc-miku-radius);
  padding: clamp(30px, 5vw, 56px) clamp(20px, 4vw, 32px) clamp(25px, 4vw, 40px);
  position: relative;
  text-align: center;
  overflow-y: auto;
  transform: none;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.rc-miku-overlay.active .rc-miku-popup {
  transform: none;
}

.rc-miku-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--rc-miku-transition);
  z-index: 10;
}

.rc-miku-close svg path {
  stroke: var(--rc-miku-close-idle);
  transition: stroke 0.2s ease;
}

.rc-miku-title {
  margin-bottom: 24px;
  color: var(--rc-miku-text);
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(18px, 4vw, 22px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.03em;
}

.rc-miku-image-container {
  width: 100%;
  margin-bottom: 16px;
}

.rc-miku-image-container img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

.rc-miku-countdown {
  margin: 0 16px;
  color: var(--rc-miku-text);
  font-family: "Noto Sans JP", sans-serif;
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.03em;
  display: flex;
  align-items: baseline;
  justify-content: center;
}

.rc-miku-countdown .number {
  color: var(--rc-miku-danger);
  font-size: 48px;
  letter-spacing: 0.03em;
}

.rc-miku-note {
  color: var(--rc-miku-text);
  margin: 16px 0 24px;
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(12px, 2vw, 14px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.03em;
  opacity: 0.8;
}

.rc-miku-btn-order {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  background: var(--rc-miku-primary);
  padding: 15px 48px;
  border-radius: 100px;
  text-decoration: none;
  gap: 10px;
  color: #ffffff;
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(16px, 2.5vw, 18px);
  font-weight: 700;
  line-height: 1;
  border: none;
}

.rc-miku-btn-order:hover {
  background: var(--rc-miku-primary-hover);
}

.rc-miku-popup::-webkit-scrollbar {
  width: 6px;
}
.rc-miku-popup::-webkit-scrollbar-thumb {
  background: #e0e0e0;
  border-radius: 10px;
}

@media (max-width: 768px) {
  .rc-miku-popup {
    padding: 40px 24px 32px;
    width: 100%;
    max-width: 343px;
  }

  .rc-miku-close {
    top: 15px;
    right: 15px;
  }

  .rc-miku-countdown .number {
    font-size: 40px;
  }

  .rc-miku-btn-order {
    width: 100%;
    padding: 14px 20px;
  }

  .rc-miku-image-container img {
    width: 295px;
    max-width: 100%;
  }
}