.container { max-width:1200px; margin:0 auto;}

/* ===== Nav ===== */
.nav { position:sticky; top:0; z-index:3000; background:#fff; backdrop-filter:blur(10px); border-bottom:1px solid #e5e7eb; }
.nav__inner { height:90px; display:flex; align-items:center; justify-content:space-between; }
.nav__logo { display:flex; align-items:center; }
.nav__toggle { display:none; flex-direction:column; gap:4px; cursor:pointer; }
.nav__toggle-bar { width:25px; height:3px; background:#1f2937; }

.nav__links { list-style:none; display:flex; gap:0; position:relative; }
.nav__item { position:relative; }
.nav__link { display:block; padding:1.5rem; color:#6b7280; font-weight:500; white-space:nowrap; }
.nav__link:hover { color:#1f2937; }

/* Mega menu */
.nav__mega { position:fixed; top:90px; left:50%; transform:translateX(-50%); width:100%; max-width:1050px;
  background:#fff; border:1px solid var(--color-border); border-radius:12px; box-shadow:0 20px 40px rgba(0,0,0,.15);
  padding:1rem; opacity:0; visibility:hidden; transition: all 0.3s ease; transform:translateX(-50%) translateY(-20px); z-index:1; }
.nav__links:hover .nav__mega, .nav__mega:hover { opacity:1; visibility:visible; pointer-events:auto; transform:translateX(-50%) translateY(-10px); }

.nav__mega-grid { display:grid; grid-template-columns:repeat(7,1fr);}
.nav__mega-section { display:flex; flex-direction:column;}
.nav__mega-title { font-size:1rem; text-align:center; color:#1f2937; padding-bottom:.5rem; border-bottom:1px solid #e5e7eb; }
.nav__mega-link {
  display: block;
  padding: .375rem 0;
  text-align: center;
  color:#6b7280;
  font-size:.875rem;
}
.nav__mega-link:hover { color:#1f2937; }

/* 뎁스 라벨(구분자 역할) */
.nav__mega-link--depth {
  font-weight: 700;
  color: #0ea5e9;
}
.nav__mega-link--depth:hover { color: #0ea5e9; }

/* 하위 묶음(시각적 계층) */
.nav__mega-sublist {
  margin: 0 0 1rem;
}

/* 하위 링크(살짝 축소, 간격 정리) */
.nav__mega-sublink {
  font-size: .875rem;
  padding: .25rem 0;
  position: relative;
}

.nav__auth { display:flex; align-items:center; gap:.5rem; }
.nav__auth-btn { font-size:.875rem; color:#6b7280; padding:.25rem .5rem; border-radius:6px; font-weight:500; }
.nav__auth-btn--login:hover { color:#1f2937; }
.nav__auth-sep { color:#9ca3af; }

@media (max-width: 768px) {
  .nav__inner { height: 70px; padding: 20px;}
  .nav__logo img { width: 70px; }
  .nav__toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    width: 20px;
    cursor: pointer;
  }

  .nav__toggle-bar {
    width: 100%;
    height: 3px;
    background: #1f2937;
    border-radius: 2px;
    margin: 0;                       /* ← 활성 시 흔들림 방지 */
    transform-origin: center;        /* ← 회전축 중앙 */
    transition: transform .3s ease, opacity .2s ease;
  }

  .nav__links { display: none; }
  .nav__auth { display: none; }

  .nav__toggle.is-active .nav__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav__toggle.is-active .nav__toggle-bar:nth-child(2) {
    opacity: 0;
  }
  .nav__toggle.is-active .nav__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

}

.mnav {
  position: fixed; inset: 0;
  display: none;
  z-index: 1000;
}
.mnav.is-open { display: block; }

.mnav__overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.45);
  opacity: 0; transition: opacity .2s ease;
}
.mnav.is-open .mnav__overlay { opacity: 1; }

.mnav__panel {
  position: absolute; top: 70px; left: 0;
  width: 100%;
  height: calc(100vh - 70px);
  background: #fff;
  transform: translateX(-100%);
  transition: transform .25s ease;
  display: flex; flex-direction: column;
}
.mnav.is-open .mnav__panel { transform: translateX(0); }

.mnav__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 20px; border-bottom: 1px solid #eee;
}
.mnav__logo img { height: 28px; }

.mnav__close {
  border: 0; background: transparent; font-size: 20px; cursor: pointer;
}

.mnav__nav { overflow-y: auto;}

.mnav__list { list-style: none; margin: 0; padding: 0; }
.mnav__item { border-bottom: 1px solid #f1f3f5; }

.mnav__btn {
  width: 100%; padding: 10px 20px; font-weight: 600;
  background: #fff; border: 0; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
}
.mnav__btn::after {
  content: '▾'; transition: transform .2s ease;
}
.mnav__btn[aria-expanded="true"]::after { transform: rotate(180deg); }

.mnav__sublist[hidden] { display: none; }

.mnav__subgroup { padding: 6px 0; }
.mnav__subgroup-title {
  font-size: 13px; font-weight: 700; color: #0ea5e9; padding: 5px 20px 5px;
}
.mnav__link {
  display: block; padding: 10px 20px; font-size: 14px; color: #222; text-decoration: none;
}
.mnav__link:active, .mnav__link:focus, .mnav__link:hover { background: #f8f9fa; }

.mnav__auth { padding: 10px 20px; }
.mnav__auth div { display: flex; justify-content: space-around; }
.mnav__auth-btn {
  display: inline-block; margin-right: 8px; padding: 8px 12px; border: 1px solid #e5e7eb; border-radius: 8px;
}


/* ===== Footer ===== */
.footer { background:#1f2937; color:#fff; padding:3rem 0 1rem; }
.footer__grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(250px,1fr)); gap:2rem; margin-bottom:2rem; }
.footer__title { margin-bottom:1rem; }
.footer__text, .footer__link { color:#d1d5db; }
.footer__link:hover { color:#fff; }
.footer__bottom { border-top:1px solid #374151; padding-top:2rem; text-align:center; color:#9ca3af; }

@media (max-width: 768px) {
  .footer {padding: 20px;}
}