:root{
  --primary-blue:#3182f6; --primary-blue-hover:#2968d7; --primary-blue-light:#e8f3ff;
  --neutral-50:#f9fafb; --neutral-100:#f2f4f6; --neutral-200:#e5e8eb; --neutral-300:#d1d6db;
  --neutral-400:#b0b8c1; --neutral-600:#6b7684; --neutral-800:#333d4b; --neutral-900:#191f28;
  --green-500:#10b981; --red-500:#ef4444; --yellow-500:#f59e0b;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--neutral-50); color:var(--neutral-900);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  line-height:1.6; -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}
.container{max-width:1100px; margin:0 auto; padding:40px 20px}
.header{text-align:center; margin-bottom:32px}
.header h1{margin:0 0 8px; font-size:28px; font-weight:700}
.header p{margin:0 0 16px; color:var(--neutral-600)}

.view-counter{
  display:flex; align-items:center; justify-content:center; gap:12px;
  font-size:14px; color:var(--neutral-600);
}
.counter-item{display:flex; flex-direction:column; align-items:center; gap:2px}
.counter-label{font-size:12px; text-transform:uppercase; font-weight:600}
.counter-value{font-size:16px; font-weight:700; color:var(--neutral-900)}
.counter-divider{font-size:16px; color:var(--neutral-400)}

.card{background:#fff; border:1px solid var(--neutral-200); border-radius:16px; box-shadow:0 1px 3px rgba(0,0,0,.06)}
.upload{padding:24px; margin-bottom:20px}

.grid{display:grid; grid-template-columns:1fr 1fr; gap:16px}
.field label{display:block; font-weight:600; margin:0 0 8px}

.drop{
  position:relative; min-height:120px; padding:20px; border:2px dashed var(--neutral-300); border-radius:12px;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  background:var(--neutral-50); transition:.15s; cursor:pointer;
}
.drop:hover{border-color:var(--primary-blue); background:var(--primary-blue-light)}
.drop.has-file{border-color:var(--green-500); background:#f0fdf4}
.file-input{position:absolute; inset:0; opacity:0; cursor:pointer}
.hint{color:var(--neutral-600); font-size:13px; text-align:center}
.name{margin-top:6px; color:var(--green-500); font-size:13px; font-weight:700}

.actions{padding:16px 0 0; display:flex; gap:8px}
.btn{
  appearance:none; border:0; border-radius:12px; padding:14px 18px; font-weight:700; cursor:pointer;
  background:var(--primary-blue); color:#fff; display:inline-flex; align-items:center; gap:8px;
}
.btn:disabled{background:var(--neutral-300); cursor:not-allowed}
.btn:not(:disabled):hover{background:var(--primary-blue-hover); transform:translateY(-1px)}
.btn-secondary{background:#fff; color:var(--neutral-900); border:1px solid var(--neutral-300)}
.btn.btn-secondary {
  background-color: #fff;        /* 기본 흰색 */
  border: 1px solid #ccc;        /* 경계선 */
  color: #333;                   /* 글자색 (건드리지 않음) */
  transition: background-color 0.2s ease-in-out;
}

.btn.btn-secondary:hover:not(:disabled) {
  background-color: rgba(0, 0, 0, 0.05); /* 흰색 → 아주 옅은 회색 */
}
.spinner{width:18px;height:18px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.result{padding:24px}
.result-header{display:flex; align-items:center; justify-content:space-between; margin-bottom:12px}
.result-title{margin:0; font-size:18px; font-weight:700}

/* 높이 제한 제거 */
.code-wrap{
  border:1px solid var(--neutral-300);
  border-radius:12px;
  overflow:auto;
}
.code-wrap pre{
  margin:0!important; padding:20px!important;
  background:#2d3748!important; color:#e2e8f0!important; font-size:14px!important;
  white-space:pre-wrap!important; word-break:break-word;
}

@media (max-width:820px){
  .grid{grid-template-columns:1fr}
  .container{padding:24px 16px}
}

/* ===============================
   Diff Highlight – Light Git Style
   =============================== */

.code-wrap {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  overflow: auto;
  background: #fff;
}
.code-wrap pre {
  margin: 0 !important;
  padding: 16px 18px !important;
  background: #fff !important;
  color: #1f2937 !important;
  font-size: 13.5px !important;
  line-height: 1.35 !important;
  white-space: pre;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace !important;
  -webkit-font-smoothing: antialiased;
  tab-size: 4;
}
code.language-diff .token.punctuation { color: #9ca3af; }
code.language-diff .token.prefix {
  display: inline-block;
  width: 1ch;
  text-align: left;
  margin-right: 6px;
  font-weight: 600;
  opacity: .9;
}
code.language-diff .token { line-height: 1.35; }
code.language-diff .token.deleted {
  display: block;
  color: #dc2626;
  background: rgba(220, 38, 38, 0.06);
  border-left: 3px solid #ef4444;
  padding: 1px 8px 1px 6px;
  border-radius: 6px;
}
code.language-diff .token.inserted {
  display: block;
  color: #059669;
  background: rgba(5, 150, 105, 0.06);
  border-left: 3px solid #10b981;
  padding: 1px 8px 1px 6px;
  border-radius: 6px;
}

/* 내부 토큰들의 중복 border 제거 */
code.language-diff .token.inserted .token.line,
code.language-diff .token.deleted .token.line {
  border: none !important;
  background: transparent !important;
  padding: 0 !important;
  margin: 0 !important;
  display: inline !important;
}

/* prefix는 원래 스타일 유지하되 중복 border만 제거 */
code.language-diff .token.inserted .token.prefix,
code.language-diff .token.deleted .token.prefix {
  border: none !important;
  background: transparent !important;
  padding: 0 !important;
  margin: 0 !important;
}
code.language-diff .token.unchanged,
code.language-diff .token.diff {
  display: block;
  color: #374151;
  padding: 1px 8px 1px 9px;
  border-radius: 4px;
  background: transparent;
}
code.language-diff { letter-spacing: 0; }

@media (prefers-color-scheme: dark) {
  .code-wrap { border-color: #374151; background: #111827; }
  .code-wrap pre { background: #111827 !important; color: #e5e7eb !important; }
  code.language-diff .token.punctuation { color: #6b7280; }
  code.language-diff .token.deleted {
    color: #fca5a5; background: rgba(239, 68, 68, 0.12); border-left-color: #ef4444;
  }
  code.language-diff .token.inserted {
    color: #86efac; background: rgba(16, 185, 129, 0.12); border-left-color: #10b981;
  }
  
  /* 다크 모드에서도 내부 토큰들의 중복 border 제거 */
  code.language-diff .token.inserted .token.line,
  code.language-diff .token.deleted .token.line {
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    display: inline !important;
  }
  
  /* 다크 모드에서 prefix 중복 border만 제거 */
  code.language-diff .token.inserted .token.prefix,
  code.language-diff .token.deleted .token.prefix {
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  code.language-diff .token.unchanged,
  code.language-diff .token.diff { color: #d1d5db; }
}

/* ===============================
   Notice & Error (일관성)
   =============================== */
/* Notice & Error (디자인 일관성) */
.notice,
.error {
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 14px;
  margin-top: 8px;       /* 위 요소와 간격 */
  margin-bottom: 12px;   /* 아래 요소와 간격 */
}

/* Notice (정보/주의) */
.notice {
  background: #fff3cd;     /* 연한 노랑 */
  color: #856404;
  border: 1px solid #ffeeba;
}

/* Error */
.error {
  background: #fdecea;     /* 연한 빨강 */
  color: var(--red-500);
  border: 1px solid #f5c2c0;
}

/* 숨김 처리 공통 */
.hidden {
  display: none !important;
}

/* ===== Guide (하단 도움말) ===== */
.guide-section {
  margin-top: 28px;
  border: 1px solid var(--neutral-200);
  border-radius: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
  background: #fff;
  overflow: hidden; /* 두겹 방지 */
}

/* 토글 버튼 */
.guide-toggle {
  width: 100%;
  padding: 16px 20px;
  background: #f9fafb;
  border: none;
  border-bottom: 1px solid var(--neutral-200);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s;
}
.guide-toggle:hover {
  background: #f3f4f6;
}

/* 펼쳤을 때 */
.guide-toggle[aria-expanded="true"] {
  background: #fff;
}

/* 내용 */
.guide-content {
  padding: 24px;
}

/* 내부 타이틀 & 스텝 디자인은 기존 그대로 */
.guide-title {
  margin: 0 0 16px;
  font-size: 20px;
  font-weight: 700;
  color: var(--neutral-900);
}

.guide-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 20px;
}

.guide-step {
  border-top: 1px solid var(--neutral-200);
  padding-top: 16px;
}
.guide-step:first-child {
  border-top: 0;
  padding-top: 0;
}

.guide-step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: 10px;
}

.guide-block {
  background: var(--neutral-50);
  border: 1px solid var(--neutral-200);
  border-radius: 12px;
  padding: 12px;
  margin-top: 10px;
}

.guide-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--neutral-600);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.guide-code {
  margin: 0;
  border-radius: 8px;
  overflow: auto;
  border: 1px solid #e5e7eb;
  background: #fff;
}
.guide-code code {
  display: block;
  padding: 12px 14px;
  font-size: 13.5px;
  line-height: 1.45;
  color: #1f2937;
  background: #fff !important;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.guide-note {
  margin: 6px 0 10px;
  font-size: 14px;
  color: var(--neutral-600);
}

.config-info {
  margin: 12px 0 0 0;
  padding: 0;
  list-style-type: disc;
  padding-left: 20px;
}

.config-info li {
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--neutral-600);
  line-height: 1.4;
}

.config-info li:last-child {
  margin-bottom: 0;
}

.config-info code {
  background: var(--neutral-200);
  color: var(--neutral-800);
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 12px;
}

.header {
  position: relative;
  text-align: center;   /* 가운데 정렬 */
  padding: 24px 0;
}

.header h1 {
  margin: 0;
  font-size: 28px;
}

.header p {
  margin: 4px 0 0;
  font-size: 16px;
  color: var(--neutral-600);
}

/* 방문자수 카운터는 우측 상단 */
.header-meta {
  position: absolute;
  top: 0;
  right: 0;
}

/* ===============================
   탭 스타일 (기존 스타일과 일관성 유지)
   =============================== */
.diff-tabs {
  display: flex;
  border-bottom: 1px solid var(--neutral-200);
  margin-bottom: 16px;
  gap: 0;
}

.tab-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--neutral-600);
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.2s ease-in-out;
  border-radius: 8px 8px 0 0;
}

.tab-btn:hover {
  background: var(--neutral-100);
  color: var(--neutral-800);
}

.tab-btn.active {
  background: #fff;
  color: var(--primary-blue);
  border-bottom-color: var(--primary-blue);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-description {
  background: var(--neutral-100);
  border: 1px solid var(--neutral-200);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 16px;
}

.tab-description p {
  margin: 0;
  font-size: 14px;
  color: var(--neutral-700);
  line-height: 1.5;
}

.tab-description code {
  background: var(--neutral-200);
  color: var(--neutral-800);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}