/* ============================================================
   테라가드 — 메인 스타일시트
   ============================================================ */

/* 리셋 & 기본 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-primary:    #2d7a4f;
  --color-primary-d:  #1e5c3a;
  --color-primary-l:  #e8f5ee;
  --color-accent:     #1976d2;
  --color-accent-l:   #e3f2fd;
  --color-text:       #1a1a2e;
  --color-text-muted: #5c6370;
  --color-border:     #e0e6ed;
  --color-bg:         #f9fafb;
  --color-white:      #ffffff;
  --color-footer:     #101820;

  --font-base: 'Noto Sans KR', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow-md: 0 8px 32px rgba(0,0,0,.10);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.14);
  --transition: .25s ease;
  --max-w: 1140px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.7;
  word-break: keep-all;
}

/* ── 건너뛰기 링크 (접근성) ── */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
  z-index: 9999;
  transition: top var(--transition);
}
.skip-link:focus { top: 0; }

/* ── 스크린리더 전용 ── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── 컨테이너 ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── 공통 섹션 ── */
.section { padding: 96px 0; }
.section:nth-child(even) { background: var(--color-bg); }

.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-l);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ── 버튼 ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  font-family: var(--font-base);
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-d); border-color: var(--color-primary-d); }
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.6);
}
.btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; }
.btn-secondary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-secondary:hover { background: #1565c0; border-color: #1565c0; }
.btn-full { width: 100%; justify-content: center; }

/* ── 헤더 ── */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-sm); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.1rem;
}
.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-weight: 800;
  letter-spacing: -.02em;
}
.logo-white { color: #fff; }
.logo-white .logo-mark { background: rgba(255,255,255,.2); border: 1.5px solid rgba(255,255,255,.4); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-menu a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: .95rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-menu a:hover, .nav-menu a:focus {
  color: var(--color-primary);
  background: var(--color-primary-l);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── 히어로 ── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 100px 0 60px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, #0d3320 0%, #1e5c3a 40%, #1a4466 100%);
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 680px;
}
.hero-tag {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.75);
  border: 1px solid rgba(255,255,255,.25);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 300;
  line-height: 1.25;
  margin-bottom: 24px;
}
.hero-title strong { font-weight: 800; display: block; }
.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,.8);
  margin-bottom: 40px;
  line-height: 1.8;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; }

/* ── 회사 소개 ── */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.about-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
}
.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.about-icon { font-size: 2.4rem; margin-bottom: 16px; }
.about-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.about-card p { font-size: .92rem; color: var(--color-text-muted); line-height: 1.7; }

/* ── 서비스 ── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.service-visual {
  padding: 40px;
  display: flex;
  justify-content: center;
}
.service-pellet .service-visual { background: linear-gradient(135deg, #e8f5e9, #c8e6c9); }
.service-design .service-visual { background: linear-gradient(135deg, #e3f2fd, #bbdefb); }

.service-icon-wrap {
  width: 80px; height: 80px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  background: #fff;
}

.service-body { padding: 32px; flex: 1; display: flex; flex-direction: column; }
.service-tag {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  display: block;
}
.service-title { font-size: 1.6rem; font-weight: 800; margin-bottom: 16px; }
.service-pellet .service-title { color: var(--color-primary-d); }
.service-design .service-title { color: #1565c0; }
.service-desc { font-size: .95rem; color: var(--color-text-muted); margin-bottom: 24px; line-height: 1.75; }

.service-features {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 32px;
  flex: 1;
}
.service-features li {
  font-size: .88rem;
  color: var(--color-text);
  padding-left: 20px;
  position: relative;
}
.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}
.service-pellet .service-features li::before { color: var(--color-primary); }
.service-design .service-features li::before { color: var(--color-accent); }
.service-btn { align-self: flex-start; margin-top: auto; }

/* ── 문의 ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}
.contact-info-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 24px; }
.contact-list { display: flex; flex-direction: column; gap: 16px; }
.contact-item { display: flex; flex-direction: column; gap: 4px; }
.contact-item dt { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--color-text-muted); }
.contact-item dd { font-size: .95rem; }
.contact-item a { color: var(--color-primary); text-decoration: none; }
.contact-item a:hover { text-decoration: underline; }

.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .9rem; font-weight: 600; }
.required { color: #d32f2f; margin-left: 2px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color var(--transition);
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(45,122,79,.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.form-privacy { }
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  font-size: .9rem;
}
.checkbox-label input[type="checkbox"] {
  width: auto;
  margin-top: 3px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}
.link { color: var(--color-primary); text-decoration: underline; cursor: pointer; background: none; border: none; font: inherit; }

/* ── 푸터 ── */
.footer { background: var(--color-footer); color: rgba(255,255,255,.65); }

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  padding: 56px 0 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  flex-wrap: wrap;
}
.footer-tagline { font-size: .85rem; color: rgba(255,255,255,.4); margin-top: 10px; }

.footer-nav ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-nav a {
  color: rgba(255,255,255,.55);
  text-decoration: none;
  font-size: .9rem;
  transition: color var(--transition);
}
.footer-nav a:hover { color: #fff; }

.footer-legal-links { display: flex; flex-direction: column; gap: 8px; }
.footer-legal-links a {
  color: rgba(255,255,255,.55);
  font-size: .85rem;
  text-decoration: underline;
  cursor: pointer;
  transition: color var(--transition);
}
.footer-legal-links a:hover { color: #fff; }

.footer-biz {
  padding: 32px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.biz-info {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  font-size: .8rem;
}
.biz-info > div { display: flex; gap: 6px; }
.biz-info dt { color: rgba(255,255,255,.4); white-space: nowrap; }
.biz-info dd { color: rgba(255,255,255,.65); }

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.copyright { font-size: .8rem; }
.footer-notice { font-size: .75rem; color: rgba(255,255,255,.35); }

/* ── 모달 ── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal[hidden] { display: none; }

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.55);
  cursor: pointer;
}
.modal-box {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-md);
  max-width: 680px;
  width: 100%;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}
.modal-box h2 {
  padding: 28px 32px 20px;
  font-size: 1.3rem;
  border-bottom: 1px solid var(--color-border);
}
.modal-body {
  padding: 24px 32px;
  overflow-y: auto;
  flex: 1;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--color-text-muted);
}
.modal-body h3 { color: var(--color-text); font-size: 1rem; margin: 20px 0 8px; }
.modal-body ul, .modal-body dl { padding-left: 20px; margin-bottom: 12px; }
.modal-body li { margin-bottom: 4px; }
.modal-body dt { font-weight: 600; color: var(--color-text); float: left; margin-right: 8px; }
.modal-body dd { margin-bottom: 6px; }
.modal-close {
  position: absolute;
  top: 20px; right: 20px;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  line-height: 1;
  transition: all var(--transition);
  color: var(--color-text-muted);
}
.modal-close:hover { background: #fee; color: #d32f2f; border-color: #f5c6cb; }

/* ── 반응형 ── */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .service-features { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .biz-info { flex-direction: column; gap: 6px; }

  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease, padding .3s ease;
    padding-top: 0; padding-bottom: 0;
  }
  .nav-menu.open {
    max-height: 300px;
    padding: 12px 16px 20px;
  }
  .nav-menu a { padding: 12px 8px; display: block; font-size: 1rem; }
}

/* ── 포커스 스타일 (접근성) ── */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ── 고대비 모드 지원 ── */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #005a2b;
    --color-accent:  #0055cc;
    --color-border:  #888;
  }
}

/* ── 모션 감소 설정 존중 ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}