/* ==========================================================
   I-SUP 공통 CSS — nav, footer, CSS 변수
   header.js에서 이동 (2026-04-20)
   ========================================================== */

/* ── CSS 변수 ── */
:root {
  --primary:       #2B7A9E;
  --primary-dark:  #1F3864;
  --primary-light: #E8F4F8;
  --bg-primary:    #FFFFFF;
  --bg-secondary:  #F8FAFB;
  --text-primary:  #1A2332;
  --text-secondary:#546E7A;
  --text-tertiary: #78909C;
  --border-color:  #E0E7ED;
}

/* ── nav 기본 ── */
nav {
  display: block !important;
  padding: 0 !important;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 8px rgba(26,35,50,0.04);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.nav-logo img {
  height: 36px;
  width: auto;
  vertical-align: middle;
  display: block;
}

/* 데스크톱 링크 */
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  flex: 1;
  justify-content: center;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a.nav-download {
  color: var(--primary);
  font-weight: 600;
  border: 1.5px solid var(--primary);
  border-radius: 7px;
  padding: 5px 13px;
  font-size: 13px;
  transition: background 0.2s, color 0.2s;
}
.nav-links a.nav-download:hover {
  background: var(--primary);
  color: #fff;
}

.nav-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-shrink: 0;
}

.nav-btn {
  padding: 8px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  background: transparent;
  transition: background 0.2s;
}
.nav-btn:hover { background: var(--primary-light); }

.nav-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 9px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: background 0.2s;
  box-shadow: 0 2px 8px rgba(43,122,158,0.2);
}
.nav-cta:hover { background: var(--primary-dark); }

/* 사용자 드롭다운 */
.nav-user { position: relative; }

.nav-user-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1.5px solid var(--border-color);
  border-radius: 8px;
  background: #fff;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  font-family: inherit;
  line-height: 1;
}
.nav-user-btn:hover { border-color: var(--primary); color: var(--primary); }
.nav-user-btn .arr { font-size: 9px; opacity: .5; }

.nav-dd {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 170px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(26,35,50,0.13);
  z-index: 9999;
}
.nav-dd.on { display: block; }

.dd-info {
  padding: 12px 16px 10px;
  border-bottom: 1px solid var(--border-color);
}
.dd-name  { font-size: 13px; font-weight: 700; color: var(--text-primary); margin-bottom: 5px; }
.dd-badge { display: inline-block; padding: 2px 9px; border-radius: 10px; font-size: 11px; font-weight: 700; }
.dd-free     { background: #f0f4ff; color: #2B7A9E; }
.dd-pro      { background: #fff8e1; color: #F57F17; }
.dd-business { background: #e8f5e9; color: #2E7D32; }

.dd-btn {
  display: block;
  width: 100%;
  padding: 11px 16px;
  text-align: left;
  font-size: 14px;
  color: var(--text-primary);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.dd-btn:hover { background: var(--bg-secondary); }

/* 햄버거 (모바일) */
.nav-ham {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}
.nav-ham span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.25s;
}

/* 모바일 드로어 */
.nav-mobile {
  display: none;
  flex-direction: column;
  background: #fff;
  border-top: 1px solid var(--border-color);
  padding: 12px 0 16px;
}
.nav-mobile.on { display: flex; }
.nav-mobile a {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-mobile a:hover { color: var(--primary); }
.nav-mobile .m-divider { height: 1px; background: var(--border-color); margin: 8px 16px; }
.nav-mobile .m-cta {
  margin: 8px 16px 0;
  padding: 12px;
  text-align: center;
  background: var(--primary);
  color: #fff !important;
  border-radius: 8px;
  font-weight: 700;
}

/* nav fixed 보정 */
body.isup-nav { padding-top: 69px !important; }

/* ── footer ── */
footer {
  display: block !important;
  background: var(--bg-primary);
  color: var(--text-secondary);
  padding: 60px 32px 32px;
  border-top: 1px solid var(--border-color);
}
.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  margin-bottom: 40px;
}
.footer-brand    { max-width: 400px; }
.footer-tagline  { font-size: 16px; color: var(--text-tertiary); margin-bottom: 8px; }
.footer-links    { display: flex; gap: 80px; }
.footer-column h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.footer-column ul          { list-style: none; }
.footer-column ul li       { margin-bottom: 12px; }
.footer-column ul li a     { color: var(--text-secondary); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.footer-column ul li a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
  padding-right: 100px;
  text-align: right;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ── 반응형 ── */
@media (max-width: 768px) {
  .nav-container { padding: 12px 20px; }
  .nav-links     { display: none !important; }
  .nav-actions   { display: none !important; }
  .nav-ham       { display: flex; }

  body.isup-nav  { padding-top: 61px !important; }

  .footer-content { flex-direction: column; gap: 40px; }
  .footer-links   { flex-direction: column; gap: 32px; }
  .footer-bottom  { padding: 10px 0; text-align: center; padding-right: 0 !important; }
}