/* ═══════════════════════════════════════════════════════════════════
   이룸 마케팅 — 사이트 전역 스타일
   ─────────────────────────────────────────────────────────────────── */

:root {
  /* Brand */
  --erum-navy-900: #0A1B3D;
  --erum-navy-800: #0F2456;
  --erum-navy-700: #173474;
  --erum-blue-600: #1F4FCF;
  --erum-blue-500: #2D63E5;
  --erum-blue-400: #4A7BFF;
  --erum-blue-300: #8AAEFF;
  --erum-blue-100: #E6EEFF;
  --erum-blue-50:  #F4F7FF;

  /* Neutrals */
  --erum-gray-50:  #F7F8FA;
  --erum-gray-100: #EEF0F4;
  --erum-gray-200: #DDE1E8;
  --erum-gray-300: #C2C8D2;
  --erum-gray-500: #6B7382;
  --erum-gray-600: #4A5160;
  --erum-gray-700: #2E3340;
  --erum-gray-900: #14161C;

  /* Semantic */
  --erum-success: #15A36E;
  --erum-success-bg: #E5F6EE;
  --erum-danger:  #D03A3A;

  /* Shadows */
  --erum-shadow-sm: 0 2px 6px rgba(15,36,86,0.06), 0 1px 2px rgba(15,36,86,0.04);
  --erum-shadow-md: 0 6px 18px rgba(15,36,86,0.08), 0 2px 4px rgba(15,36,86,0.04);
  --erum-shadow-lg: 0 16px 40px rgba(15,36,86,0.10), 0 4px 8px rgba(15,36,86,0.04);
  --erum-shadow-cta: 0 8px 20px rgba(31,79,207,0.28);

  --erum-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ───── Reset & Base ───── */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Pretendard', 'Pretendard Variable', -apple-system, BlinkMacSystemFont,
               system-ui, 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  color: var(--erum-gray-900);
  background: #fff;
  line-height: 1.5;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

/* ───── Container & utilities ───── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.eyebrow {
  display: inline-block;
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--erum-blue-500);
  margin-bottom: 14px;
}
.eyebrow-dark { color: var(--erum-blue-300); }
.h2 {
  font-size: 40px; line-height: 1.15;
  font-weight: 800; letter-spacing: -0.025em;
  color: var(--erum-navy-900);
  margin: 0 0 14px;
}
.sub {
  font-size: 17px; line-height: 1.6;
  color: var(--erum-gray-600);
  margin: 0 0 56px;
}
.section-head { text-align: center; margin-bottom: 56px; }
.text-blue { color: var(--erum-blue-500); }

/* ───── Buttons ───── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; border: 0; cursor: pointer; text-decoration: none;
  transition: all 200ms var(--erum-ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--erum-blue-500); color: #fff;
  padding: 14px 26px; border-radius: 10px; font-size: 16px;
  box-shadow: var(--erum-shadow-cta);
}
.btn-primary:hover {
  background: var(--erum-blue-600);
  transform: translateY(-1px);
}
.btn-ghost {
  background: rgba(255,255,255,0.08); color: #fff;
  padding: 13px 25px; border-radius: 10px; font-size: 16px;
  border: 1px solid rgba(255,255,255,0.18);
}
.btn-ghost:hover { background: rgba(255,255,255,0.14); }
.btn-secondary {
  background: #fff; color: var(--erum-navy-800);
  padding: 12px 24px; border-radius: 10px; font-size: 15px;
  border: 1.5px solid var(--erum-navy-800);
}
.btn-secondary:hover { background: var(--erum-blue-50); }

/* ───── Header ───── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--erum-gray-100);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.site-header .header-centered {
  justify-content: center;
  position: relative;
}
.site-header .header-centered .site-logo {
  position: absolute; left: 24px;
}
.site-header .header-centered .menu-toggle {
  position: absolute; right: 24px;
}
.site-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 900;
  color: var(--erum-navy-900); letter-spacing: 0.04em;
  font-feature-settings: "kern" 1;
}
.site-logo-mark {
  width: 36px; height: 36px;
  object-fit: contain;
  border-radius: 8px;
  color: var(--erum-navy-900);
  flex-shrink: 0;
}
.site-nav {
  display: flex; align-items: center; gap: 32px;
}
.site-nav a {
  font-size: 15px; font-weight: 500;
  color: var(--erum-gray-700);
  transition: color 160ms var(--erum-ease);
}
.site-nav a:hover { color: var(--erum-blue-500); }
.header-cta { display: flex; align-items: center; gap: 12px; }
.header-cta .btn-primary { padding: 10px 20px; font-size: 14px; box-shadow: none; }

.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 0; background: transparent; cursor: pointer;
  padding: 0;
}
.menu-toggle svg { width: 24px; height: 24px; stroke: var(--erum-navy-900); }

@media (max-width: 900px) {
  .site-nav, .header-cta { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
}

/* Mobile menu drawer */
.mobile-menu {
  position: fixed; inset: 68px 0 0 0;
  background: #fff;
  z-index: 40;
  padding: 24px;
  display: flex; flex-direction: column; gap: 4px;
  transform: translateX(100%);
  transition: transform 280ms var(--erum-ease);
  overflow-y: auto;
}
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu a {
  font-size: 18px; font-weight: 600;
  color: var(--erum-navy-900);
  padding: 16px 8px;
  border-bottom: 1px solid var(--erum-gray-100);
}
.mobile-menu .btn-primary { margin-top: 24px; box-shadow: var(--erum-shadow-cta); }

/* ───── Nav dropdown ───── */
.nav-item-dropdown {
  position: relative;
}
.nav-item-dropdown > a { display: flex; align-items: center; gap: 4px; }
.nav-dropdown {
  position: absolute; top: calc(100% + 12px); left: 50%;
  transform: translateX(-50%);
  background: #fff;
  border: 1px solid var(--erum-gray-200);
  border-radius: 10px;
  box-shadow: var(--erum-shadow-md);
  min-width: 120px;
  padding: 6px 0;
  opacity: 0; pointer-events: none;
  transition: opacity 160ms var(--erum-ease), transform 160ms var(--erum-ease);
  transform: translateX(-50%) translateY(-4px);
}
.nav-item-dropdown:hover .nav-dropdown {
  opacity: 1; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 10px 18px;
  font-size: 14px; font-weight: 600;
  color: var(--erum-navy-900);
  white-space: nowrap;
}
.nav-dropdown a:hover { color: var(--erum-blue-500); background: var(--erum-blue-50); }

/* ───── Closing ───── */
.closing {
  background: var(--erum-gray-50);
  padding: 96px 0;
}
.closing-inner {
  max-width: 720px; margin: 0 auto; text-align: center;
}
.closing-eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--erum-blue-500);
  margin: 0 0 16px;
}
.closing h2 {
  font-size: 40px; font-weight: 800; letter-spacing: -0.025em;
  color: var(--erum-navy-900); line-height: 1.15;
  margin: 0 0 40px;
}
.closing-body {
  text-align: left;
  background: #fff;
  border: 1px solid var(--erum-gray-200);
  border-radius: 16px;
  padding: 36px 40px;
  margin-bottom: 36px;
}
.closing-body p {
  font-size: 16px; line-height: 1.8;
  color: var(--erum-gray-700);
  margin: 0 0 20px;
}
.closing-body p:last-child { margin-bottom: 0; }
.closing-body strong { color: var(--erum-navy-900); }
@media (max-width: 768px) {
  .closing { padding: 64px 0; }
  .closing h2 { font-size: 28px; }
  .closing-body { padding: 24px 20px; }
}
/* ───── Footer (Simple) ───── */
.site-footer {
  background: var(--erum-navy-900);
  color: rgba(255,255,255,0.75);
  padding: 48px 0 32px;
  font-size: 14px;
}
.footer-simple {
  display: flex; flex-direction: column;
  align-items: center; gap: 16px;
  text-align: center;
}
.footer-brand-line { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.footer-brand-name {
  font-size: 20px; font-weight: 900;
  color: #fff; letter-spacing: 0.04em;
}
.footer-tag {
  color: rgba(255,255,255,0.55); font-size: 14px;
}
.footer-contact-line {
  display: flex; gap: 24px; flex-wrap: wrap; justify-content: center;
  font-size: 14px; color: rgba(255,255,255,0.65);
  padding: 10px 0;
}
.footer-meta-line {
  display: flex; gap: 18px; flex-wrap: wrap; justify-content: center;
  font-size: 12px; color: rgba(255,255,255,0.4);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px; margin-top: 8px; width: 100%;
}

/* ───── Sticky CTA ───── */
.sticky-cta {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 60;
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--erum-blue-500); color: #fff;
  padding: 16px 24px;
  border-radius: 999px;
  font-size: 15px; font-weight: 700;
  box-shadow: 0 12px 32px rgba(31,79,207,0.4), 0 4px 12px rgba(31,79,207,0.2);
  text-decoration: none;
  transition: all 200ms var(--erum-ease);
  opacity: 0;
  transform: translateY(100px);
  pointer-events: none;
}
.sticky-cta.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.sticky-cta:hover {
  background: var(--erum-blue-600);
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(31,79,207,0.5);
}
.sticky-cta svg { width: 18px; height: 18px; }
@media (max-width: 600px) {
  .sticky-cta { bottom: 16px; right: 16px; padding: 14px 20px; font-size: 14px; }
  .sticky-cta svg { width: 16px; height: 16px; }
}