/* ===== AI 윤리 학습터 리뉴얼 — 일러스트 톤 디자인 시안 ===== */
:root {
  --bg: #FFF9EE;            /* 크림 배경 */
  --ink: #3D3A4B;           /* 본문 잉크 */
  --ink-soft: #6E6A80;
  --card: #FFFFFF;
  --line: #3D3A4B;

  --sky: #5AC8FA;           /* 하늘 */
  --sky-soft: #E3F5FF;
  --sun: #FFCF3F;           /* 노랑 */
  --sun-soft: #FFF3CC;
  --coral: #FF7E67;         /* 코랄 */
  --coral-soft: #FFE4DE;
  --mint: #4ECBA5;          /* 민트 */
  --mint-soft: #DFF7EE;
  --grape: #9B8CFF;         /* 보라 */
  --grape-soft: #ECE8FF;

  --radius: 24px;
  --shadow: 0 6px 0 rgba(61, 58, 75, .14);
  --font-title: 'Jua', 'Malgun Gothic', sans-serif;
  --font-body: 'Noto Sans KR', 'Malgun Gothic', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 17px;
  word-break: keep-all;
  overflow-wrap: break-word;
}
h1, h2, h3, .font-title { font-family: var(--font-title); font-weight: 400; letter-spacing: .01em; }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; vertical-align: middle; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- 헤더 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  border-bottom: 3px solid var(--ink);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 16px;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-title); font-size: 22px; }
.logo .logo-badge {
  width: 44px; height: 44px; border-radius: 14px;
  background: var(--sun);
  border: 3px solid var(--ink);
  display: grid; place-items: center;
  box-shadow: 0 3px 0 rgba(61,58,75,.2);
}
.nav { margin-left: auto; display: flex; gap: 6px; align-items: center; }
.nav a {
  padding: 8px 14px; border-radius: 999px; font-family: var(--font-title); font-size: 16px;
  color: var(--ink-soft);
}
.nav a:hover { background: var(--sun-soft); color: var(--ink); }
.nav a.active { background: var(--ink); color: #fff; }
.nav .nav-cta {
  background: var(--coral); color: #fff; border: 3px solid var(--ink);
  box-shadow: 0 3px 0 rgba(61,58,75,.25);
}
.nav .nav-cta:hover { background: #ff6a50; color: #fff; }

/* ---------- 버튼 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-title); font-size: 18px;
  padding: 13px 26px; border-radius: 999px;
  border: 3px solid var(--ink); cursor: pointer;
  background: var(--card); color: var(--ink);
  box-shadow: var(--shadow);
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 0 rgba(61,58,75,.14); }
.btn:active { transform: translateY(2px); box-shadow: 0 2px 0 rgba(61,58,75,.14); }
.btn-primary { background: var(--sky); color: #063B55; }
.btn-coral { background: var(--coral); color: #fff; }
.btn-sun { background: var(--sun); }
.btn-sm { font-size: 15px; padding: 8px 16px; box-shadow: 0 3px 0 rgba(61,58,75,.14); }

/* ---------- 히어로 ---------- */
.hero { padding: 64px 0 40px; position: relative; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 32px; align-items: center; }
.hero h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.25; }
.hero h1 .hl { position: relative; display: inline-block; }
.hero h1 .hl::after {
  content: ""; position: absolute; left: -2px; right: -2px; bottom: 4px; height: 14px;
  background: var(--sun); z-index: -1; border-radius: 6px;
}
.hero p.lead { margin-top: 16px; font-size: 19px; color: var(--ink-soft); }
.hero .cta-row { margin-top: 28px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-art { text-align: center; }

/* 떠다니는 장식 */
.floaty { position: absolute; border-radius: 50%; opacity: .55; }
.floaty.f1 { width: 90px; height: 90px; background: var(--mint-soft); top: 30px; left: -20px; }
.floaty.f2 { width: 56px; height: 56px; background: var(--coral-soft); bottom: 40px; right: 12%; }
.floaty.f3 { width: 34px; height: 34px; background: var(--grape-soft); top: 70px; right: 30%; }

/* ---------- 이원 진입 (학생/교사) ---------- */
.dual { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 8px 0 12px; }
.dual-card {
  border: 3px solid var(--ink); border-radius: var(--radius); background: var(--card);
  padding: 24px 26px; display: flex; gap: 18px; align-items: center;
  box-shadow: var(--shadow); transition: transform .12s ease;
}
.dual-card:hover { transform: translateY(-3px); }
.dual-card .emoji-badge {
  flex: 0 0 64px; width: 64px; height: 64px; border-radius: 20px;
  display: grid; place-items: center; font-size: 32px; border: 3px solid var(--ink);
}
.dual-card.student .emoji-badge { background: var(--sky-soft); }
.dual-card.teacher .emoji-badge { background: var(--mint-soft); }
.dual-card h3 { font-size: 22px; }
.dual-card p { font-size: 15px; color: var(--ink-soft); }
.dual-card .arrow { margin-left: auto; font-size: 24px; font-family: var(--font-title); }

/* ---------- 섹션 ---------- */
.section { padding: 44px 0; }
.section-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 24px; }
.section-head h2 { font-size: 30px; }
.section-head .sub { color: var(--ink-soft); font-size: 15px; }

/* ---------- 단원 카드 그리드 ---------- */
.unit-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.unit-card {
  position: relative;
  border: 3px solid var(--ink); border-radius: var(--radius);
  background: var(--card); padding: 26px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 12px;
  transition: transform .12s ease;
}
.unit-card:hover { transform: translateY(-4px); }
.unit-card .unit-no {
  font-family: var(--font-title); font-size: 15px;
  display: inline-flex; padding: 4px 12px; border-radius: 999px;
  border: 2.5px solid var(--ink); align-self: flex-start;
}
.unit-card h3 { font-size: 23px; line-height: 1.35; }
.unit-card .goal { font-size: 15px; color: var(--ink-soft); flex: 1; }
.unit-meta { display: flex; gap: 14px; font-size: 14px; color: var(--ink-soft); }
.unit-meta span { display: inline-flex; align-items: center; gap: 5px; }
.unit-card.c-sky   { background: var(--sky-soft); }   .unit-card.c-sky .unit-no   { background: var(--sky); color: #063B55; }
.unit-card.c-sun   { background: var(--sun-soft); }   .unit-card.c-sun .unit-no   { background: var(--sun); }
.unit-card.c-mint  { background: var(--mint-soft); }  .unit-card.c-mint .unit-no  { background: var(--mint); color: #073F2F; }
.unit-card.c-coral { background: var(--coral-soft); } .unit-card.c-coral .unit-no { background: var(--coral); color: #fff; }
.unit-card.c-grape { background: var(--grape-soft); } .unit-card.c-grape .unit-no { background: var(--grape); color: #fff; }
.unit-card.wide { grid-column: span 2; flex-direction: row; align-items: center; }
.unit-card.wide .goal { flex: 1; }

/* 진행률 바 */
.progress {
  height: 14px; border-radius: 999px; border: 2.5px solid var(--ink);
  background: #fff; overflow: hidden;
}
.progress > i { display: block; height: 100%; background: var(--mint); border-radius: 999px; }
.progress-label { font-size: 13px; color: var(--ink-soft); margin-top: 5px; }

/* ---------- 수료증 배너 ---------- */
.certify {
  border: 3px dashed var(--ink); border-radius: var(--radius);
  background: var(--sun-soft); padding: 28px 30px;
  display: flex; align-items: center; gap: 22px;
}
.certify h3 { font-size: 24px; }
.certify p { color: var(--ink-soft); font-size: 15px; }
.certify .btn { margin-left: auto; flex-shrink: 0; }

/* ---------- 단원 상세 ---------- */
.unit-hero { padding: 44px 0 26px; }
.crumb { font-size: 14px; color: var(--ink-soft); margin-bottom: 14px; }
.crumb b { color: var(--ink); }
.unit-hero h1 { font-size: clamp(28px, 4vw, 40px); }
.unit-hero .goal-box {
  margin-top: 18px; border: 3px solid var(--ink); border-radius: 18px;
  background: var(--card); padding: 16px 20px; display: flex; gap: 12px; align-items: flex-start;
  box-shadow: var(--shadow); font-size: 16px;
}
.sticky-progress {
  position: sticky; top: 72px; z-index: 40;
  background: var(--bg); padding: 10px 0 12px; border-bottom: 2px dashed rgba(61,58,75,.25);
}
.sticky-progress .wrap { display: flex; align-items: center; gap: 14px; }
.sticky-progress .progress { flex: 1; }
.sticky-progress .pct { font-family: var(--font-title); font-size: 16px; white-space: nowrap; }

/* 활동 카드 */
.activity {
  border: 3px solid var(--ink); border-radius: var(--radius);
  background: var(--card); box-shadow: var(--shadow);
  margin-bottom: 26px; overflow: hidden;
}
.activity-head {
  padding: 16px 22px; display: flex; align-items: center; gap: 12px;
  border-bottom: 3px solid var(--ink);
}
.activity-head .tag {
  font-family: var(--font-title); font-size: 14px; padding: 3px 12px;
  border-radius: 999px; border: 2.5px solid var(--ink);
}
.activity-head h3 { font-size: 21px; }
.activity-head .done-check { margin-left: auto; display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--ink-soft); }
.done-check input { width: 20px; height: 20px; accent-color: #2FA97F; cursor: pointer; }
.activity-body { padding: 22px; display: grid; gap: 16px; }
.activity.a-sky .activity-head { background: var(--sky-soft); }   .activity.a-sky .tag { background: var(--sky); color: #063B55; }
.activity.a-sun .activity-head { background: var(--sun-soft); }   .activity.a-sun .tag { background: var(--sun); }
.activity.a-mint .activity-head { background: var(--mint-soft); } .activity.a-mint .tag { background: var(--mint); color: #073F2F; }
.activity.a-coral .activity-head { background: var(--coral-soft); } .activity.a-coral .tag { background: var(--coral); color: #fff; }

/* 말풍선 문답 */
.chat { display: grid; gap: 10px; }
.bubble { display: flex; gap: 10px; align-items: flex-start; }
.bubble .who {
  flex: 0 0 40px; width: 40px; height: 40px; border-radius: 50%;
  border: 2.5px solid var(--ink); display: grid; place-items: center; font-size: 20px; background: #fff;
}
.bubble .msg {
  border: 2.5px solid var(--ink); border-radius: 4px 18px 18px 18px;
  padding: 10px 16px; background: #fff; font-size: 15.5px;
  min-width: 0;
}
.bubble.t .who { background: var(--sun-soft); }
.bubble.s .msg { background: var(--sky-soft); border-radius: 18px 4px 18px 18px; }
.bubble.s { flex-direction: row-reverse; }

/* 영상 파사드 */
.video-facade {
  position: relative; aspect-ratio: 16/9; border-radius: 16px; overflow: hidden;
  border: 3px solid var(--ink); background: linear-gradient(135deg, var(--grape-soft), var(--sky-soft));
  display: grid; place-items: center; cursor: pointer;
}
.video-facade .play {
  width: 74px; height: 74px; border-radius: 50%; background: var(--coral);
  border: 3px solid var(--ink); display: grid; place-items: center;
  box-shadow: 0 5px 0 rgba(61,58,75,.2); font-size: 28px; color: #fff;
  transition: transform .12s ease;
}
.video-facade:hover .play { transform: scale(1.08); }
.video-facade .vf-label {
  position: absolute; left: 14px; bottom: 12px; background: #fff;
  border: 2.5px solid var(--ink); border-radius: 999px; padding: 4px 14px;
  font-size: 14px; font-family: var(--font-title);
}
.video-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* 체험 카드 */
.try-card {
  border: 3px solid var(--ink); border-radius: 18px; background: var(--grape-soft);
  padding: 18px 20px; display: flex; gap: 16px; align-items: center;
}
.try-card .try-emoji { font-size: 34px; }
.try-card h4 { font-family: var(--font-title); font-size: 18px; }
.try-card p { font-size: 14px; color: var(--ink-soft); }
.try-card .btn { margin-left: auto; flex-shrink: 0; }
.try-meta { display: flex; gap: 12px; font-size: 13px; color: var(--ink-soft); margin-top: 4px; }

/* 퀴즈 */
.quiz {
  border: 3px solid var(--ink); border-radius: 18px; background: var(--sun-soft);
  padding: 20px 22px;
}
.quiz .q { font-family: var(--font-title); font-size: 18px; display: flex; gap: 10px; align-items: flex-start; }
.quiz .ox-row { display: flex; gap: 12px; margin-top: 14px; }
.quiz .ox {
  flex: 1; font-family: var(--font-title); font-size: 26px; padding: 12px;
  border: 3px solid var(--ink); border-radius: 16px; background: #fff; cursor: pointer;
  box-shadow: 0 4px 0 rgba(61,58,75,.14); transition: transform .1s ease;
}
.quiz .ox:hover { transform: translateY(-2px); }
.quiz .ox.correct { background: var(--mint); color: #073F2F; }
.quiz .ox.wrong { background: var(--coral); color: #fff; }
.quiz .feedback { margin-top: 12px; font-size: 15px; display: none; }
.quiz .feedback.show { display: block; }
.quiz .feedback b { font-family: var(--font-title); }

/* 마무리 */
.recap {
  border: 3px solid var(--ink); border-radius: var(--radius); background: var(--mint-soft);
  padding: 26px; box-shadow: var(--shadow);
}
.recap h3 { font-size: 24px; margin-bottom: 12px; }
.recap ul { list-style: none; display: grid; gap: 10px; }
.recap li { display: flex; gap: 10px; align-items: flex-start; font-size: 16px; }
.recap li::before { content: "✅"; }
.next-row { display: flex; justify-content: space-between; margin-top: 28px; gap: 14px; flex-wrap: wrap; }

/* ---------- 교사 자료실 ---------- */
.teacher-hero { padding: 48px 0 20px; }
.teacher-hero h1 { font-size: clamp(28px, 4vw, 40px); }
.teacher-hero p { margin-top: 10px; color: var(--ink-soft); }
.notice {
  margin-top: 18px; border: 3px solid var(--ink); border-radius: 18px; background: var(--sky-soft);
  padding: 14px 20px; font-size: 15px; display: flex; gap: 10px; align-items: flex-start;
}
.res-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.res-card {
  border: 3px solid var(--ink); border-radius: 20px; background: var(--card);
  padding: 22px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 10px;
}
.res-card .res-top { display: flex; align-items: center; gap: 10px; }
.res-card .lesson-no {
  font-family: var(--font-title); font-size: 14px; padding: 3px 12px; border-radius: 999px;
  border: 2.5px solid var(--ink); background: var(--sun);
}
.res-card h3 { font-size: 20px; }
.res-card .links { color: var(--ink-soft); font-size: 14px; }
.res-card .dl-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.res-card.wide { grid-column: span 2; background: var(--grape-soft); }
.chip {
  font-size: 13.5px; font-family: var(--font-title);
  border: 2.5px solid var(--ink); border-radius: 999px; padding: 5px 13px;
  background: #fff; cursor: pointer; display: inline-flex; gap: 6px; align-items: center;
}
.chip:hover { background: var(--sun-soft); }
.curri-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 15px; }
.curri-table th, .curri-table td { border-bottom: 2px dashed rgba(61,58,75,.25); padding: 12px 14px; text-align: left; }
.curri-table th { font-family: var(--font-title); font-size: 15px; background: var(--sun-soft); }
.curri-table tr:last-child td { border-bottom: none; }
.table-card { border: 3px solid var(--ink); border-radius: 20px; overflow: hidden; background: #fff; box-shadow: var(--shadow); }

/* ---------- 푸터 ---------- */
.site-footer {
  margin-top: 56px; border-top: 3px solid var(--ink); background: var(--sun-soft);
  padding: 34px 0 44px; font-size: 14px; color: var(--ink-soft);
}
.site-footer .wrap { display: grid; gap: 6px; }
.site-footer b { color: var(--ink); }

/* ---------- 반응형 ---------- */
@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 320px; margin: 0 auto; }
  .dual { grid-template-columns: 1fr; }
  .unit-grid { grid-template-columns: 1fr; }
  .unit-card.wide { grid-column: span 1; flex-direction: column; align-items: flex-start; }
  .video-row { grid-template-columns: 1fr; }
  .res-grid { grid-template-columns: 1fr; }
  .res-card.wide { grid-column: span 1; }
  .try-card { flex-direction: column; align-items: flex-start; }
  .try-card .btn { margin-left: 0; }
  .certify { flex-direction: column; text-align: center; }
  .certify .btn { margin: 0 auto; }
  .nav { display: none; }
}