/* ==========================================================================
   paper.css — 종이/문서 재질 컴포넌트 (재사용)
   ========================================================================== */

/* 기본 종이 시트: 미세 그레인 + 살짝 불균일한 색 */
.paper-sheet {
  position: relative;
  background:
    radial-gradient(circle at 12% 8%, rgba(255,255,255,0.35), transparent 40%),
    radial-gradient(circle at 88% 92%, rgba(0,0,0,0.06), transparent 45%),
    repeating-linear-gradient(115deg, rgba(0,0,0,0.015) 0px, rgba(0,0,0,0.015) 1px, transparent 1px, transparent 3px),
    var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow-paper);
}

/* 여러 장이 겹쳐진 느낌: 뒤에 살짝 어긋난 종이 2장 */
.paper-stack { position: relative; }
.paper-stack::before,
.paper-stack::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--paper-aged);
  z-index: -1;
  box-shadow: var(--shadow-paper);
}
.paper-stack::before { transform: rotate(-1.1deg) translate(-4px, 6px); }
.paper-stack::after  { transform: rotate(0.8deg) translate(6px, 3px); background: var(--paper-rose); }

/* 접힌 모서리 (종이 귀퉁이) */
.fold-corner { position: relative; }
.fold-corner::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 16px; height: 16px;
  background: linear-gradient(135deg, transparent 50%, rgba(42,23,48,0.14) 50%);
}

/* 도장 (원형, 약간 회전, 붉은 잉크) */
.stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--stamp-red);
  color: var(--stamp-red);
  border-radius: 50%;
  transform: rotate(-9deg);
  opacity: 0.85;
  font-family: var(--font-serif);
  font-weight: 900;
  mix-blend-mode: multiply;
}

/* 공식 문서 라벨 박스 (STAR TORCH ACADEMY OFFICIAL EXAM PAPER 등) */
.doc-label {
  border: 1px solid var(--muted-magenta);
  color: var(--muted-magenta);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 5px 10px;
  text-align: center;
  line-height: 1.5;
  background: rgba(154, 62, 114, 0.05);
}

/* 종이 클립 (금속) */
.paperclip {
  position: absolute;
  width: 20px;
  height: 40px;
  border: 3px solid #9AA0A8;
  border-radius: 10px;
  background: transparent;
  box-shadow: inset 0 0 0 3px transparent, 2px 2px 3px rgba(0,0,0,0.4);
}
.paperclip::after {
  content: "";
  position: absolute;
  top: 6px; left: 3px;
  width: 8px; height: 22px;
  border: 3px solid #9AA0A8;
  border-radius: 6px;
  background: transparent;
}

/* 별/구분선 장식 */
.rule-star {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gold);
}
.rule-star::before, .rule-star::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

/* 손글씨 코멘트 (빨간펜) */
.redpen {
  font-family: var(--font-hand);
  color: var(--stamp-red);
  transform: rotate(-1.5deg);
  display: inline-block;
}

/* 고양이 낙서 (아주 작은 easter egg, 흑백 라인) */
.cat-doodle {
  opacity: 0.55;
  filter: sepia(0.2);
}

/* 밑줄 강조 (형광펜 느낌 대신 얇은 이중선) */
.ink-underline {
  text-decoration: underline;
  text-decoration-color: var(--aimes-pink-deep);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

/* 낡은 종이 배지 (규칙 메모, 안내문) */
.memo-note {
  background: var(--paper);
  color: var(--ink);
  padding: 12px 14px;
  box-shadow: var(--shadow-paper);
  position: relative;
  font-size: 12px;
  line-height: 1.6;
}
.memo-note::before {
  content: "";
  position: absolute;
  top: -6px; left: 18px;
  width: 26px; height: 12px;
  background: rgba(201, 162, 74, 0.55);
  transform: rotate(-3deg);
}