/* ───────────────────────────────────────────────
   nav.css — 모든 페이지 공통 상단 고정바 (단일 소스)
   index.html / greeting.html / scope.html 통일
   ─────────────────────────────────────────────── */

/* ─────────── BASE ─────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  padding: 24px 32px;
  min-height: 72px;
  display: flex;
  flex-wrap: wrap;
  row-gap: 8px;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(250, 250, 250, 0.7);
  border-bottom: 1px solid transparent;
  transition: border 0.3s;
}
nav.scrolled { border-bottom: 1px solid var(--line); }

/* ─────────── LOGO ─────────── */
nav .logo {
  display: flex;
  align-items: baseline;
  font-size: 18px;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}
nav .logo .logo-medimap {
  font-weight: 700;
  letter-spacing: -0.03em;
}
nav .logo .logo-equals {
  display: inline-block;
  font-weight: 800;
  font-size: 1.18em;
  letter-spacing: 0;
  line-height: 1;
  width: 0;
  overflow: hidden;
  opacity: 0;
  margin: 0;
  color: var(--accent);
  white-space: nowrap;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.45s ease,
              margin 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
nav .logo.show-equals .logo-equals {
  width: 0.6em;
  opacity: 1;
  margin: 0 0.18em;
}
nav .logo.equals-blue .logo-equals { color: var(--accent); }
nav .logo.equals-orange .logo-equals { color: var(--accent-orange); }
nav .logo .logo-solutions {
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-left: 0.22em;
  transition: margin-left 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              filter 0.35s ease;
}
nav .logo.show-equals .logo-solutions { margin-left: 0; }
nav .logo.solutions-flash .logo-solutions { filter: brightness(1.6); }
nav .logo .app-version {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-dim);
  margin-left: 6px;
  letter-spacing: 0;
}

/* ─────────── MENU ─────────── */
nav .menu {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  font-size: 14px;
  color: var(--text-muted);
}
nav .menu a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
  white-space: nowrap;
  writing-mode: horizontal-tb;
  word-break: keep-all;
  letter-spacing: -0.01em;
}
nav .menu a:hover { color: var(--text); }
nav .menu a.active {
  color: var(--text);
  font-weight: 600;
}

/* ─────────── NAV RIGHT (CTA) ─────────── */
nav .nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
nav .cta {
  background: var(--text);
  color: var(--bg);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s;
  letter-spacing: -0.01em;
}
nav .cta:hover { opacity: 0.85; }

/* ─────────── 태블릿/모바일 (≤900) — wrap 메뉴 ─────────── */
@media (max-width: 900px) {
  nav {
    padding: 12px 16px;
    min-height: auto;
    row-gap: 6px;
  }
  nav .logo { font-size: 15px; flex-shrink: 0; }
  nav .nav-right { gap: 8px; flex-shrink: 0; }
  nav .menu {
    gap: 6px 20px;
    font-size: 13px;
    width: 100%;
    order: 3;
    justify-content: center;
    line-height: 1.4;
  }
  nav .menu a { padding: 2px 0; }
}

/* ─────────── 모바일 (≤480) ─────────── */
@media (max-width: 480px) {
  nav { padding: 10px 14px; }
  nav .logo { font-size: 14px; }
  nav .logo .app-version { font-size: 9px; margin-left: 4px; }
  nav .nav-right { gap: 10px; }
  nav .menu { font-size: 12px; gap: 4px 14px; }
}

/* ─────────── 소형 모바일 (≤360) ─────────── */
@media (max-width: 360px) {
  nav { padding: 8px 12px; }
  nav .logo { font-size: 13px; }
}