/* style.css */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: #f4f6f8;
  font-family: 'Noto Sans KR', sans-serif;
  color: #333;
}

/* 컨테이너가 버튼 아래에서 시작하도록 여백 조정 */
.container {
  max-width: 680px;
  margin: 100px auto 20px;
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

h1 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 20px;
  color: #2c3e50;
}

.mode-switch {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 30px;
}

.mode-switch button {
  flex: 1;
  padding: 12px 0;
  font-size: 18px;
  border: none;
  border-radius: 8px;
  background: #e0e0e0;
  color: #555;
  cursor: pointer;
  transition: background 0.3s;
}

.mode-switch button.active {
  background: #27ae60;
  color: #fff;
}

.section {
  display: none;
}

.section.active {
  display: block;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: bold;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

.checkbox-group {
  display: flex;
  gap: 10px;
}

.calc-btn {
  width: 100%;
  padding: 14px;
  background: #27ae60;
  color: #fff;
  font-size: 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s;
}

.calc-btn:hover {
  background: #219150;
}

.result-box {
  margin-top: 30px;
  background: #ecf0f1;
  padding: 20px;
  border-radius: 8px;
}

.result-box h2 {
  margin-bottom: 12px;
  color: #16a085;
}

.result-box .item {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 16px;
}

.result-box .item:nth-child(odd) {
  background: #d0e6f0;
  border-radius: 4px;
}

.result-box .net {
  margin-top: 15px;
  font-size: 20px;
  font-weight: bold;
  color: #c0392b;
  text-align: right;
}

.group {
  border: 1px solid #ddd;
  padding: 12px 16px;
  margin-bottom: 20px;
  border-radius: 6px;
  background: #fafafa;
}

.group legend {
  font-weight: bold;
  padding: 0 6px;
  color: #444;
}

.group label {
  display: inline-flex;
  align-items: center;
  margin-right: 16px;
  font-size: 15px;
}

.group label input {
  margin-right: 4px;
}

.footer {
  margin-top: 40px;
  font-size: 14px;
  color: #666;
  line-height: 1.6;
  border-top: 1px solid #ccc;
  padding-top: 20px;
}

.footer ul {
  list-style: disc inside;
  margin-left: 10px;
}

.hidden {
  display: none;
}

/* 천 단위 콤마 입력 */
input.thousands {
  text-align: right;
}

.tooltip {
  position: relative;
  cursor: help;
  margin-left: 4px;
}

.tooltip:hover::after {
  content: attr(title);
  position: absolute;
  top: 120%;
  left: 0;
  background: #333;
  color: #fff;
  padding: 6px;
  border-radius: 4px;
  white-space: nowrap;
  font-size: 13px;
  z-index: 10;
}

.error {
  color: #e74c3c;
  font-size: 13px;
  margin-top: 4px;
  display: block;
}

/* ← 다른 도구 더 보기 버튼 */
.home-button {
  position: fixed;
  top: 12px;
  left: 0;
  right: 0;
  margin: auto;
  width: fit-content;
  padding: 14px 24px;
  background-color: #0066cc;
  color: #fff;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1.3em;
  box-shadow: 0 6px 12px rgba(0,0,0,0.3);
  overflow: hidden;
  transition: background-color 0.3s, transform 0.2s, box-shadow 0.3s;
  z-index: 999;
}

.home-button:hover {
  background-color: #004999;
  transform: translateY(-3px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.5);
}

.home-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: rgba(255,255,255,0.4);
  transform: skewX(-30deg);
  animation: shine 3s infinite;
}

@keyframes shine {
  0%   { left: -75%; }
  50%  { left: 125%; }
  100% { left: -75%; }
}

@media (max-width: 600px) {
  .home-button {
    font-size: 1.1em;
    padding: 10px 16px;
    top: 10px;
  }
}