/* 퍼센트 계산기 전용 스타일 */

nav { max-width: 760px; }
main { max-width: 760px; }

.card-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
}

.mode-tab {
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--surface);
  color: var(--text-sub);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
  white-space: nowrap;
}
.mode-tab:hover {
  border-color: var(--text-sub);
  color: var(--text);
}
.mode-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.pc-card {
  padding: 1.5rem 1.3rem 1.3rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 1rem;
}

.pc-equation {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.65rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.pc-num {
  width: 140px;
  padding: 0.55rem 0.7rem;
  font-size: 1.1rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-weight: 700;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.pc-num.small { width: 80px; }
.pc-num:focus {
  border-color: var(--primary);
}

.pc-op {
  color: var(--text-sub);
  font-size: 0.95rem;
  font-weight: 600;
}

.pc-result {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  min-width: 60px;
  padding: 0.2rem 0.55rem;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 7px;
}
.pc-result:empty::before {
  content: "?";
  color: var(--text-sub);
  font-weight: 600;
  opacity: 0.5;
}

.pc-formula {
  margin: 0.85rem 0 0;
  padding: 0.55rem 0.85rem;
  font-size: 0.85rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color: var(--text-sub);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 7px;
  font-variant-numeric: tabular-nums;
  min-height: 1.7rem;
}
.pc-formula:empty { display: none; }

.btn-copy {
  margin-top: 0.95rem;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--text-sub);
  border: 1px solid var(--border);
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.btn-copy:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.example-card {
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

.example-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.example-list li {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-sub);
  padding-left: 1.1rem;
  position: relative;
}
.example-list li::before {
  content: "·";
  position: absolute;
  left: 0.35rem;
  color: var(--primary);
  font-weight: 800;
}
.example-list b {
  color: var(--text);
  font-weight: 700;
}

@media (max-width: 600px) {
  .mode-tab { font-size: 0.78rem; padding: 0.45rem 0.7rem; }
  .pc-num { width: 110px; font-size: 1rem; }
  .pc-num.small { width: 70px; }
  .pc-equation { font-size: 1rem; gap: 0.4rem 0.55rem; }
  .pc-result { font-size: 1.3rem; }
}