/* ===========================
   세모기획 - 공통 스타일
   =========================== */

:root {
  --primary: #1A4F8A;
  --primary-dark: #0F3260;
  --primary-light: #2E6DB4;
  --accent: #4A9FE0;
  --accent-light: #EBF5FF;
  --text-dark: #1A202C;
  --text-mid: #4A5568;
  --text-light: #718096;
  --white: #FFFFFF;
  --bg-light: #F7FAFF;
  --bg-gray: #F4F6FA;
  --border: #E2EAF4;
  --shadow-sm: 0 2px 8px rgba(26,79,138,0.08);
  --shadow-md: 0 8px 30px rgba(26,79,138,0.12);
  --shadow-lg: 0 20px 60px rgba(26,79,138,0.18);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans KR', sans-serif;
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

ul, ol {
  list-style: none;
}

/* ===========================
   네비게이션
   =========================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 900;
  font-family: 'Montserrat', sans-serif;
  position: relative;
  overflow: hidden;
}

.logo-mark::after {
  content: '';
  position: absolute;
  top: -10px;
  right: -10px;
  width: 25px;
  height: 25px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text .brand {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.logo-text .sub {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-light);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-mid);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  background: var(--accent-light);
}

.nav-link.active {
  font-weight: 600;
}

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

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.nav-dropdown-toggle i {
  font-size: 12px;
  transition: var(--transition);
}

.nav-dropdown:hover .nav-dropdown-toggle i {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  padding: 8px;
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 100;
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  top: calc(100% + 8px);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-mid);
  transition: var(--transition);
  white-space: nowrap;
}

.dropdown-item:hover {
  background: var(--accent-light);
  color: var(--primary);
}

.dropdown-item i {
  width: 20px;
  color: var(--accent);
  font-size: 13px;
}

.nav-cta {
  background: var(--primary);
  color: white !important;
  padding: 10px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  margin-left: 8px;
}

.nav-cta:hover {
  background: var(--primary-dark) !important;
  color: white !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(26,79,138,0.3);
}

/* 햄버거 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* 모바일 메뉴 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: white;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  z-index: 999;
  padding: 16px 24px 24px;
  max-height: calc(100vh - 72px);
  overflow-y: auto;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  color: var(--text-mid);
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu a.mobile-sub {
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-light);
}

.mobile-cta-btn {
  display: block;
  margin-top: 16px;
  background: var(--primary);
  color: white !important;
  text-align: center;
  padding: 14px;
  border-radius: 10px;
  font-weight: 600;
  border-bottom: none !important;
}

/* ===========================
   공통 섹션 스타일
   =========================== */

.section {
  padding: 100px 24px;
}

.section-sm {
  padding: 60px 24px;
}

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

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}

.section-title {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.section-title em {
  color: var(--primary);
  font-style: normal;
}

.section-desc {
  font-size: 16px;
  color: var(--text-light);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===========================
   버튼
   =========================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  font-family: 'Noto Sans KR', sans-serif;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(26,79,138,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

.btn-white {
  background: white;
  color: var(--primary);
}

.btn-white:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255,255,255,0.3);
}

.btn-lg {
  padding: 18px 36px;
  font-size: 16px;
  border-radius: 12px;
}

/* ===========================
   카드 공통
   =========================== */

.card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 32px;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--accent);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: var(--accent-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 22px;
  margin-bottom: 20px;
  transition: var(--transition);
}

.card:hover .card-icon {
  background: var(--primary);
  color: white;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-dark);
}

.card-desc {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===========================
   페이지 히어로 (서브페이지)
   =========================== */

.page-hero {
  padding: 140px 24px 80px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(74,159,224,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.page-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.9);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
  border: 1px solid rgba(255,255,255,0.2);
}

.page-hero h1 {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -1.5px;
}

.page-hero p {
  font-size: 17px;
  opacity: 0.85;
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto;
}

/* ===========================
   푸터
   =========================== */

.footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 24px 32px;
}

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

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo-mark {
  margin-bottom: 16px;
}

.footer-brand .brand-name {
  font-size: 20px;
  font-weight: 700;
  color: white;
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 260px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: white;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 10px;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-info {
  font-size: 13px;
  line-height: 2;
  color: rgba(255,255,255,0.5);
}

.footer-info span {
  margin-right: 20px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

.footer-bottom a {
  color: rgba(255,255,255,0.6);
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* ===========================
   반응형
   =========================== */

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-menu,
  .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .section {
    padding: 70px 20px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 56px 16px;
  }

  .btn-lg {
    padding: 14px 24px;
    font-size: 15px;
  }
}

/* ===========================
   유틸리티
   =========================== */

.text-primary { color: var(--primary); }
.text-center { text-align: center; }
.fw-bold { font-weight: 700; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* 애니메이션 */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.fade-in-up {
  animation: fadeInUp 0.7s ease forwards;
}

/* 스크롤 애니메이션 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }