@font-face {
  font-family: "Source Code Pro";
  src: url("fonts/SourceCodePro-VariableFont_wght.ttf") format("truetype");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "D2Coding";
  src: url("fonts/D2Coding-Regular.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  --color-green: #9DF2AE;
  --color-green-light: #ccfcd5;
  --color-pink: #FF50A4;
  --color-pink-light: #FFBBDF;
  --color-purple: #b192e9;
  --color-blue: #289bfc;
  --color-white: #ffffff;
  --color-black: #111111;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;

  --font-base: "Source Code Pro", "D2Coding", monospace;
  --font-size-sm: 0.625rem;
  --font-size-md: 0.75rem;
  --font-size-lg: 1rem;
  --font-size-xl: 1.25rem;
  --line-height: 1.5;
}

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

body {
  font-family: var(--font-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0px;
  width: 100%;
  padding: 0px;
  letter-spacing: -1.5px;

  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

#etherpad-frame {
  flex: 1;
  min-height: 0;
  padding-right: var(--space-lg);
  padding-left: var(--space-lg);
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

#etherpad {
  width: 100%;
  height: 100%;
  border: 2px solid var(--color-green);
}

.button {
  font-family: var(--font-base);
  margin: var(--space-md);
  padding: var(--space-xs);
  background-color: var(--color-green-light);
  border: 2px solid var(--color-purple);
  font-size: var(--font-size-md);
  font-weight: bold;
  color: var(--color-pink);
  letter-spacing: -1.5px;
  position: absolute;
  top: 0;
  right: -4px;
  cursor: pointer;
}

/* PC (768px 이상): 화면 전체 너비의 70% */
@media (min-width: 768px) {
  #etherpad {
    width: 60vw;
  }
}

.text-frame {
  flex-shrink: 0;  /* 텍스트 프레임은 자기 높이 유지 */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
}

.description {
  font-size: var(--font-size-md);
  text-align: center;
}

.credit-frame {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.credit {
  font-size: var(--font-size-sm);
  color: var(--color-green);
  padding-right: var(--space-lg);
  padding-left: var(--space-lg);
  padding-top: var(--space-xs);
  padding-bottom: var(--space-sm);
}

/* ===== 파티클 ===== */
.particle-layer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none; /* 파티클이 클릭을 가로채지 않게 */
}

.particle {
  position: absolute;
  top: 0;
  left: 0;
  height: auto;
  will-change: transform;
  user-select: none;
}

/* 평소 파티클: 콘텐츠 뒤 */
.particle-layer--back {
  z-index: 0;
}

/* 터진 파티클: 맨 앞 (이더패드·텍스트도 가림) */
.particle-layer--front {
  z-index: 100;
}

/* 콘텐츠는 평소 파티클 위에 */
.text-frame,
#etherpad-frame {
  position: relative;
  z-index: 1;
}