/* 팔레트: 배경 #0d1117 · 카드 #151c26 · 경계 #2a3442 · 본문 #dfe7f1 · 보조 #8b98a9
 * 강조(앰버) #ffb454 · 성공 #7ee2a8 · 오류 #ff6b6b · 모노스페이스 터미널 */
:root {
  --bg: #0d1117; --card: #151c26; --line: #2a3442;
  --ink: #dfe7f1; --dim: #8b98a9; --amber: #ffb454;
  --ok: #7ee2a8; --bad: #ff6b6b;
  --sans: "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", system-ui, sans-serif;
  --mono: "SF Mono", "D2Coding", ui-monospace, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink); font-family: var(--sans);
  line-height: 1.65; min-height: 100vh; display: flex; flex-direction: column;
}
.noscript { padding: 2rem; text-align: center; color: var(--bad); }

/* ---- 상단 바 ---- */
#topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 1rem;
  padding: .6rem 1rem; background: rgba(13,17,23,.92);
  border-bottom: 1px solid var(--line); backdrop-filter: blur(6px);
}
#topbar[hidden] { display: none; }
#btn-home {
  text-decoration: none; background: transparent; border: 1px solid var(--line); color: var(--ink);
  border-radius: 8px; padding: .35rem .8rem; font-family: var(--sans); font-size: .9rem; white-space: nowrap;
}
#btn-home:hover { border-color: var(--amber); color: var(--amber); }
.home-link { margin: 0 0 1rem; }
.home-link a { color: var(--dim); text-decoration: none; font-size: .9rem; }
.home-link a:hover { color: var(--amber); }
#progress { font-weight: 700; color: var(--amber); letter-spacing: .04em; }
#timer { margin-left: auto; font-family: var(--mono); color: var(--dim); }
#btn-notebook {
  background: transparent; border: 1px solid var(--line); color: var(--ink);
  border-radius: 8px; padding: .35rem .8rem; cursor: pointer; font-family: var(--sans);
}
#btn-notebook:hover { border-color: var(--amber); color: var(--amber); }

/* ---- 화면/카드 ---- */
#screen { flex: 1; width: 100%; max-width: 780px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 1.6rem 1.7rem; animation: rise .35s ease both;
}
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.badge {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .06em;
  color: #0d1117; background: var(--amber); border-radius: 999px; padding: .15rem .7rem;
  margin-bottom: .6rem;
}
.card h1 { margin: .2rem 0 1rem; font-size: 1.45rem; }
.card h2 { margin: .2rem 0 .8rem; font-size: 1.3rem; }
.story { color: var(--dim); }
blockquote {
  margin: 1rem 0; padding: .8rem 1.1rem; border-left: 3px solid var(--amber);
  background: rgba(255,180,84,.07); border-radius: 0 8px 8px 0; font-style: italic;
}
.fine { font-size: .8rem; color: var(--dim); }

/* ---- 증거 목업 공통 ---- */
.evidence { margin: 1.2rem 0; }
.evidence img { max-width: 100%; display: block; border-radius: 8px; }
.viewer, .sns, .search, .term, .memo {
  border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
  margin: .9rem 0; background: #10161f;
}
.viewer-title, .sns-head, .search-bar {
  padding: .5rem .9rem; font-size: .85rem; color: var(--dim);
  background: #0b0f16; border-bottom: 1px solid var(--line); font-family: var(--mono);
}
.search-bar .q { color: var(--amber); font-weight: 700; }
table.meta { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.meta caption { text-align: left; padding: .5rem .9rem; color: var(--dim); font-size: .8rem; }
table.meta th, table.meta td { padding: .4rem .9rem; border-top: 1px solid var(--line); text-align: left; }
table.meta th { color: var(--dim); width: 32%; font-weight: 600; }
table.meta td { font-family: var(--mono); }
.post { padding: .8rem .9rem; border-top: 1px solid var(--line); }
.post:first-of-type { border-top: 0; }
.post-meta { font-size: .8rem; color: var(--dim); font-family: var(--mono); margin-bottom: .2rem; }
.post img { margin-top: .6rem; border: 1px solid var(--line); }
.result { padding: .8rem .9rem; border-top: 1px solid var(--line); }
.result h3 { margin: 0 0 .3rem; font-size: 1rem; color: var(--amber); }
.result p { margin: .2rem 0; font-size: .92rem; }
.sig, .review { color: var(--dim); font-style: italic; }
.dim { color: var(--dim); font-size: .85em; }
code { font-family: var(--mono); background: #0b0f16; padding: .1em .4em; border-radius: 4px; }
.term pre {
  margin: 0; padding: 1rem; font-family: var(--mono); font-size: .85rem;
  color: #9fe8a8; background: #05080d; overflow-x: auto; line-height: 1.5;
}
.memo { padding: .8rem 1rem; background: rgba(255,180,84,.05); }
.memo p { margin: .3rem 0; }
.handwrite { font-style: italic; color: var(--amber); line-height: 1.9; }
.memo.final { text-align: center; padding: 1.4rem; }
.sign { color: var(--dim); }

/* ---- 정답 입력 ---- */
.answer-form { margin-top: 1.4rem; display: flex; gap: .6rem; }
.answer-form input {
  flex: 1; padding: .7rem .9rem; border-radius: 10px; border: 1px solid var(--line);
  background: #0b0f16; color: var(--ink); font-size: 1rem; font-family: var(--sans);
}
.answer-form input:focus { outline: none; border-color: var(--amber); }
.answer-form button {
  padding: .7rem 1.3rem; border-radius: 10px; border: 0; cursor: pointer;
  background: var(--amber); color: #0d1117; font-weight: 700; font-size: 1rem;
}
.answer-form button:hover { filter: brightness(1.1); }
.question { font-weight: 700; margin-top: 1.2rem; }
.feedback { min-height: 1.4rem; margin: .5rem 0 0; font-size: .92rem; }
.feedback.bad { color: var(--bad); }
.shake { animation: shake .4s; }
@keyframes shake {
  0%,100% { transform: translateX(0); } 20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); } 60% { transform: translateX(-5px); } 80% { transform: translateX(5px); }
}

/* ---- 힌트 ---- */
.hintbox { margin-top: 1.2rem; border-top: 1px dashed var(--line); padding-top: .9rem; }
.hintbox button {
  background: transparent; border: 1px solid var(--line); color: var(--dim);
  border-radius: 8px; padding: .4rem .9rem; cursor: pointer; font-family: var(--sans);
}
.hintbox button:disabled { opacity: .4; cursor: default; }
.hintbox ol { margin: .6rem 0 0; padding-left: 1.3rem; color: var(--dim); }
.hintbox li { margin: .3rem 0; }

/* ---- 키패드 ---- */
.keypad { margin-top: 1.4rem; text-align: center; }
.code-display {
  font-family: var(--mono); font-size: 2.2rem; letter-spacing: .6em; text-indent: .6em;
  background: #05080d; border: 1px solid var(--line); border-radius: 10px;
  padding: .5rem; margin-bottom: 1rem; color: var(--ok);
}
.keys { display: grid; grid-template-columns: repeat(3, 72px); gap: .55rem; justify-content: center; }
.keys button {
  height: 52px; font-size: 1.15rem; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line); background: #10161f; color: var(--ink); font-family: var(--mono);
}
.keys button:hover { border-color: var(--amber); }
.keys .key-ok { background: var(--amber); color: #0d1117; font-weight: 700; }
.keys .key-clear { color: var(--bad); }

/* ---- 클리어/성공 ---- */
.success-block {
  margin-top: 1.4rem; padding: 1rem 1.2rem; border: 1px solid rgba(126,226,168,.4);
  background: rgba(126,226,168,.07); border-radius: 10px;
}
.success-block p { margin: .3rem 0; color: var(--ok); }
.next-btn, .start-btn, .retry-btn {
  display: inline-block; margin-top: 1rem; padding: .75rem 1.6rem; border-radius: 10px;
  border: 0; cursor: pointer; background: var(--amber); color: #0d1117;
  font-weight: 700; font-size: 1.05rem; font-family: var(--sans);
}
.stats { display: flex; gap: 2rem; margin: 1.2rem 0; }
.stats div { text-align: center; }
.stats .num { font-size: 1.7rem; font-family: var(--mono); color: var(--amber); }
.stats .label { font-size: .8rem; color: var(--dim); }

/* ---- 단서 노트 ---- */
#notebook {
  position: fixed; top: 0; right: 0; height: 100vh; width: min(340px, 90vw); z-index: 20;
  background: #131a24; border-left: 1px solid var(--line);
  transform: translateX(100%); transition: transform .25s ease;
  display: flex; flex-direction: column; box-shadow: -12px 0 30px rgba(0,0,0,.45);
}
#notebook.notebook-open { transform: translateX(0); }
.notebook-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: .8rem 1rem; border-bottom: 1px solid var(--line);
}
.notebook-head h2 { margin: 0; font-size: 1.05rem; color: var(--amber); }
#btn-notebook-close { background: none; border: 0; color: var(--dim); font-size: 1.1rem; cursor: pointer; }
#notebook-list { list-style: none; margin: 0; padding: 1rem; overflow-y: auto; }
#notebook-list li {
  padding: .7rem .8rem; margin-bottom: .6rem; border: 1px dashed var(--line);
  border-radius: 8px; font-size: .9rem; background: rgba(255,180,84,.04);
}
#notebook-list li.empty { color: var(--dim); border-style: solid; font-style: italic; }

#site-foot { text-align: center; color: var(--dim); font-size: .75rem; padding: 1rem; border-top: 1px solid var(--line); }

@media (max-width: 520px) {
  .answer-form { flex-direction: column; }
  .keys { grid-template-columns: repeat(3, 30%); }
  .stats { gap: 1rem; }
}