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

:root {
  --green-50:  #f0fdf4;
  --green-100: #dcfce7;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --green-900: #14532d;
  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-300: #cbd5e1;
  --slate-500: #64748b;
  --slate-700: #334155;
  --slate-900: #0f172a;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Apple SD Gothic Neo', 'Pretendard', 'Malgun Gothic', sans-serif;
  color: var(--slate-700);
  line-height: 1.7;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ────────────────────────────────
   네비게이션
──────────────────────────────── */
#header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 200;
  transition: background 0.3s, box-shadow 0.3s;
}

#header.scrolled {
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.nav {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 28px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  transition: color 0.3s;
}

#header.scrolled .nav-logo {
  color: var(--green-700);
}

.logo-tree {
  font-size: 1.5rem;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 36px;
}

.nav-links a {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  transition: color 0.2s;
}

#header.scrolled .nav-links a {
  color: var(--slate-500);
}

.nav-links a:hover,
#header.scrolled .nav-links a:hover {
  color: var(--green-600);
}

.nav-cta {
  background: #fff;
  color: var(--green-700);
  padding: 9px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 700;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

#header.scrolled .nav-cta {
  background: var(--green-600);
  color: #fff;
}

.nav-cta:hover {
  box-shadow: 0 4px 16px rgba(22,163,74,0.35);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: #fff;
  cursor: pointer;
}

#header.scrolled .nav-toggle {
  color: var(--slate-700);
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: #fff;
  padding: 16px 28px 24px;
  border-top: 1px solid var(--slate-100);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.mobile-menu a {
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--slate-700);
  border-bottom: 1px solid var(--slate-100);
}

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

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

/* ────────────────────────────────
   히어로
──────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 100px 24px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, var(--green-900) 0%, var(--green-700) 50%, #2d9a56 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;
  max-width: 680px;
}

.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.9);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,0.2);
}

.hero-content h1 {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 24px;
}

.hero-title-ko {
  display: block;
  font-size: 3.4rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero-title-en {
  display: block;
  font-size: 1.6rem;
  font-weight: 400;
  color: rgba(255,255,255,0.55);
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  letter-spacing: 0.01em;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.18);
}

.btn-white {
  background: #fff;
  color: var(--green-800);
}

.btn-outline-white {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.6);
}

.btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
}

.btn-primary {
  background: var(--green-600);
  color: #fff;
}

.btn-primary:hover {
  background: var(--green-700);
}

.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.scroll-arrow {
  display: block;
  width: 12px;
  height: 12px;
  border-right: 2px solid rgba(255,255,255,0.6);
  border-bottom: 2px solid rgba(255,255,255,0.6);
  transform: rotate(45deg);
  animation: bounce 1.8s infinite;
}

@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.6; }
  50%       { transform: rotate(45deg) translateY(5px); opacity: 1; }
}

/* ────────────────────────────────
   섹션 공통
──────────────────────────────── */
.section {
  padding: 96px 24px;
}

.section-gray {
  background: var(--slate-50);
}

.section-green {
  background: linear-gradient(135deg, var(--green-800) 0%, var(--green-600) 100%);
}

.container {
  max-width: 1140px;
  margin: 0 auto;
}

.section-tag {
  display: block;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-600);
  margin-bottom: 12px;
}

.tag-light {
  color: rgba(255,255,255,0.65);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  color: var(--slate-900);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.title-light {
  color: #fff;
}

.section-desc {
  text-align: center;
  color: var(--slate-500);
  font-size: 1rem;
  margin-bottom: 52px;
  line-height: 1.8;
}

.desc-light {
  color: rgba(255,255,255,0.75);
}

/* ────────────────────────────────
   소개
──────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 72px;
  align-items: center;
  margin-top: 52px;
}

.about-emblem {
  text-align: center;
}

.tree-circle {
  width: 200px;
  height: 200px;
  background: var(--green-50);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  border: 3px solid var(--green-100);
}

.tree-emoji {
  font-size: 5rem;
  line-height: 1;
}

.emblem-caption {
  font-size: 0.9rem;
  color: var(--slate-500);
  font-style: italic;
}

.about-lead {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 16px;
}

.about-body {
  color: var(--slate-500);
  font-size: 1rem;
  margin-bottom: 36px;
  line-height: 1.9;
}

.values-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.value-card {
  background: var(--green-50);
  border-radius: 16px;
  padding: 24px;
  border-left: 4px solid var(--green-500);
}

.value-icon {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.value-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--green-800);
  margin-bottom: 8px;
}

.value-card p {
  font-size: 0.9rem;
  color: var(--slate-500);
  line-height: 1.7;
}

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

.card {
  background: #fff;
  border-radius: 20px;
  padding: 36px 28px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  transition: transform 0.25s, box-shadow 0.25s;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(22,163,74,0.14);
}

.card-icon {
  font-size: 2.4rem;
  margin-bottom: 18px;
}

.card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 12px;
}

.card p {
  font-size: 0.9rem;
  color: var(--slate-500);
  line-height: 1.7;
  flex: 1;
}

.card-link {
  display: inline-block;
  margin-top: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--green-600);
  transition: gap 0.2s;
}

.card-link:hover {
  color: var(--green-800);
}

/* ────────────────────────────────
   예약
──────────────────────────────── */
.booking-form {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 24px;
  padding: 48px;
  backdrop-filter: blur(8px);
  max-width: 780px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.02em;
}

.booking-form input,
.booking-form select,
.booking-form textarea {
  padding: 12px 16px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  color: #fff;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}

.booking-form input::placeholder,
.booking-form textarea::placeholder {
  color: rgba(255,255,255,0.4);
}

.booking-form select option {
  color: var(--slate-700);
  background: #fff;
}

.booking-form input:focus,
.booking-form select:focus,
.booking-form textarea:focus {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.18);
}

.booking-form .btn-white {
  margin-top: 8px;
}

/* ────────────────────────────────
   문의
──────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: start;
  margin-top: 52px;
}

.info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
  align-items: flex-start;
}

.info-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.info-item strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 4px;
  letter-spacing: 0.02em;
}

.info-item p {
  font-size: 0.95rem;
  color: var(--slate-500);
  line-height: 1.6;
}

.info-item a {
  color: var(--green-600);
  font-weight: 500;
}

.info-item a:hover {
  text-decoration: underline;
}

.social-links {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.social-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--green-50);
  border: 1px solid var(--green-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--green-700);
  transition: background 0.2s, color 0.2s;
}

.social-btn:hover {
  background: var(--green-600);
  color: #fff;
  border-color: var(--green-600);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.contact-form .form-group {
  margin-bottom: 20px;
}

.contact-form label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--slate-700);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.contact-form input,
.contact-form textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--slate-300);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--slate-700);
  outline: none;
  transition: border-color 0.2s;
  background: #fff;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--green-500);
}

/* ────────────────────────────────
   푸터
──────────────────────────────── */
.footer {
  background: var(--slate-900);
  color: var(--slate-500);
  padding: 48px 24px 32px;
}

.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
}

.footer-name {
  font-weight: 700;
  color: #fff;
}

.footer-links {
  display: flex;
  gap: 28px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--slate-500);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--green-400, #4ade80);
}

.footer-bottom p {
  font-size: 0.85rem;
  line-height: 1.8;
}

/* ────────────────────────────────
   반응형
──────────────────────────────── */
@media (max-width: 1024px) {
  .programs-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .values-grid {
    max-width: 480px;
    margin: 0 auto;
  }
}

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

  .nav-toggle {
    display: block;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .programs-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .booking-form {
    padding: 28px 20px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

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

  .footer-links {
    flex-wrap: wrap;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .hero-btns {
    flex-direction: column;
    align-items: center;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }
}