/* =========================================================
   PLATFORM-EduMedia · 공통 디자인 토큰
   파스텔 톤: 노랑 / 주황 / 민트 / 스카이블루
   ========================================================= */
@import url('https://hangeul.pstatic.net/hangeul_static/css/nanum-square.css');

:root {
  /* Brand pastels */
  --c-yellow:        #FFE066;
  --c-yellow-soft:   #FFF3BF;
  --c-yellow-deep:   #FAB005;

  --c-orange:        #FFA94D;
  --c-orange-soft:   #FFE8CC;
  --c-orange-deep:   #F76707;

  --c-mint:          #8CE99A;
  --c-mint-soft:     #C3FAE8;
  --c-mint-deep:     #20C997;

  --c-sky:           #74C0FC;
  --c-sky-soft:      #D0EBFF;
  --c-sky-deep:      #1C7ED6;

  /* Neutrals */
  --c-ink:           #2B2D42;
  --c-ink-soft:      #495057;
  --c-muted:         #868E96;
  --c-line:          #E9ECEF;
  --c-bg:            #FFFDF7;
  --c-card:          #FFFFFF;

  /* Semantic */
  --c-danger:        #FA5252;
  --c-success:       var(--c-mint-deep);

  /* Layout */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --shadow-sm: 0 2px 8px rgba(43, 45, 66, 0.06);
  --shadow-md: 0 8px 24px rgba(43, 45, 66, 0.08);
  --shadow-lg: 0 18px 48px rgba(43, 45, 66, 0.12);

  --maxw: 1180px;

  /* Typography */
  --font-base: 'NanumSquare', 'Pretendard', 'Apple SD Gothic Neo',
               -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
               'Helvetica Neue', Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  font-family: 'NanumSquare', sans-serif;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

a { color: var(--c-sky-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

button { font-family: inherit; cursor: pointer; }

/* ---------------- 공용 컨테이너 ---------------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- 상단 네비 ---------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 253, 247, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.1rem; color: var(--c-ink);
}
.brand-logo {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--c-yellow) 0%, var(--c-orange) 50%, var(--c-mint) 100%);
  display: grid; place-items: center; color: white; font-weight: 900;
  box-shadow: var(--shadow-sm);
}
.brand-logo-img {
  width: 40px; height: 40px; border-radius: 50%;
  object-fit: cover; box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}
/* 가로형 워드마크 로고 (logo0.png) */
.brand-wmark {
  width: 130px; height: 36px; display: block;
  object-fit: contain;
}

/* 마스코트 캐릭터 (Character_SafetyTIP.png) */
.mascot {
  display: inline-block;
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.12));
}
.mascot-bounce { animation: mascotBob 3s ease-in-out infinite; }
@keyframes mascotBob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}
.nav-menu {
  display: flex; gap: 4px; align-items: center;
}
.nav-menu a {
  padding: 8px 14px; border-radius: var(--radius-sm);
  color: var(--c-ink-soft); font-weight: 500;
}
.nav-menu a:hover { background: var(--c-yellow-soft); text-decoration: none; }
.nav-menu a.active { background: var(--c-mint-soft); color: var(--c-ink); }

/* ---------------- 버튼 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px;
  border: none; font-weight: 700; font-size: 0.95rem;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: linear-gradient(135deg, var(--c-orange) 0%, var(--c-yellow-deep) 100%);
  color: white; box-shadow: 0 6px 16px rgba(247, 103, 7, 0.25);
}
.btn-primary:hover { box-shadow: 0 10px 24px rgba(247, 103, 7, 0.35); }
.btn-mint {
  background: linear-gradient(135deg, var(--c-mint) 0%, var(--c-sky) 100%);
  color: white; box-shadow: 0 6px 16px rgba(28, 126, 214, 0.18);
}
.btn-ghost {
  background: white; color: var(--c-ink);
  border: 1.5px solid var(--c-line);
}
.btn-ghost:hover { border-color: var(--c-orange); color: var(--c-orange-deep); }
.btn-sm { padding: 8px 14px; font-size: 0.85rem; }

/* ---------------- 카드 ---------------- */
.card {
  background: var(--c-card); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px;
}
.card-pad-lg { padding: 32px; }

/* ---------------- 섹션 헤더 ---------------- */
.section { padding: 80px 0; }
.section-tight { padding: 48px 0; }
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800; margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.section-sub {
  color: var(--c-muted); font-size: 1.05rem; margin: 0 0 40px;
}
.eyebrow {
  display: inline-block;
  background: var(--c-mint-soft); color: var(--c-mint-deep);
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.05em;
  padding: 6px 12px; border-radius: 999px; margin-bottom: 14px;
  text-transform: uppercase;
}

/* ---------------- 그리드 ---------------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .nav-menu a { padding: 8px 10px; font-size: 0.9rem; }
  .nav-menu .btn { display: none; }
}

/* ---------------- 푸터 ---------------- */
.footer {
  background: var(--c-ink); color: rgba(255,255,255,0.8);
  padding: 48px 0 32px; margin-top: 80px;
  font-size: 0.9rem;
}
.footer .container { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer h5 { color: white; margin: 0 0 12px; font-size: 0.95rem; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 6px; }
.footer a { color: rgba(255,255,255,0.7); }
.footer .copy {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 32px; padding-top: 18px;
  text-align: center; color: rgba(255,255,255,0.55); font-size: 0.82rem;
  grid-column: 1 / -1;
}
@media (max-width: 700px) {
  .footer .container { grid-template-columns: 1fr; }
}

/* ---------------- 칩/태그 ---------------- */
.chip {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  font-size: 0.78rem; font-weight: 600;
}
.chip-yellow { background: var(--c-yellow-soft); color: #8C6D00; }
.chip-orange { background: var(--c-orange-soft); color: var(--c-orange-deep); }
.chip-mint   { background: var(--c-mint-soft);   color: var(--c-mint-deep); }
.chip-sky    { background: var(--c-sky-soft);    color: var(--c-sky-deep); }

/* ---------------- 콘텐츠 보호 / 워터마크 ---------------- */

/* 모서리 로고 워터마크 — 브랜드 + 구독자 ID 한 박지로 */
.watermark-corner {
  position: absolute; z-index: 35;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 6px;
  background: rgba(255,255,255,0.88);
  border-radius: 999px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  pointer-events: none;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  user-select: none;
}
.watermark-corner.tr { top: 14px; right: 14px; }
.watermark-corner.br { bottom: 14px; right: 14px; }
.watermark-corner.bl { bottom: 14px; left: 14px; }

/* 영상 플레이어 안 — 컨트롤바 위로 띄움 */
.watermark-corner.stv { bottom: 70px; right: 14px; z-index: 40; }

.watermark-corner img {
  width: 26px; height: 26px; border-radius: 50%;
  flex: 0 0 auto;
}
.watermark-corner .wm-info {
  font-size: 0.7rem;
  color: var(--c-ink-soft);
  line-height: 1.25;
  font-family: 'Menlo', 'Consolas', monospace;
}
.watermark-corner .wm-info strong {
  display: block; color: var(--c-ink);
  font-family: 'Pretendard', 'Apple SD Gothic Neo', sans-serif;
  font-size: 0.78rem; font-weight: 700;
}

/* 어두운 배경(영상 플레이어 등)용 변형 */
.watermark-corner.dark { background: rgba(0,0,0,0.55); }
.watermark-corner.dark .wm-info { color: rgba(255,255,255,0.78); }
.watermark-corner.dark .wm-info strong { color: white; }

/* 구버전 호환용 (격자 워터마크) — 사용 안 함 */
.watermark-tile { display: none !important; }

/* 보호 배지 (좌상단 등 별도 위치용) */
.protect-badge {
  background: rgba(0,0,0,0.65); color: white;
  padding: 5px 12px; border-radius: 999px;
  font-size: 0.72rem; font-weight: 600;
  display: inline-flex; align-items: center; gap: 6px;
  pointer-events: none;
  backdrop-filter: blur(4px);
}
.protect-badge::before { content: '🔒'; }

/* 콘텐츠 위 안내 띠 */
.protect-notice {
  background: linear-gradient(135deg, #FFF3BF 0%, #FFE8CC 100%);
  border-left: 4px solid var(--c-orange-deep);
  padding: 10px 16px; border-radius: 10px;
  font-size: 0.85rem; color: var(--c-ink-soft);
  display: flex; align-items: center; gap: 10px;
}
.protect-notice strong { color: var(--c-orange-deep); }

/* 인쇄 시 워터마크 강화 (인포그래픽 B안 — 인쇄 허용하되 워터마크 박힌 채로) */
@media print {
  .watermark-tile { opacity: 0.22 !important; }
}

/* ---------------- 유틸 ---------------- */
.text-center { text-align: center; }
.muted { color: var(--c-muted); }
.mt-0  { margin-top: 0; }
.mt-12 { margin-top: 12px; }
.mt-24 { margin-top: 24px; }
.mt-48 { margin-top: 48px; }
.mb-0  { margin-bottom: 0; }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-12 { gap: 12px; } .gap-16 { gap: 16px; }