:root {
  --green: #00810C;
  --green-dark: #00630a;
  --green-deep: #004a07;
  --green-tint: #e8f5ea;
  --green-tint-2: #f3faf4;
  --ink: #14251a;
  --ink-soft: #44564b;
  --muted: #6b7c71;
  --line: #dce7df;
  --white: #ffffff;
  --radius: 18px;
  --shadow: 0 18px 45px -18px rgba(0, 99, 10, 0.28);
  --shadow-soft: 0 8px 28px -14px rgba(20, 37, 26, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}

.logo__mark {
  display: inline-flex;
  flex: 0 0 auto;
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo__name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--green);
}

.logo__sub {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

.main-nav a:hover {
  color: var(--green);
}

.main-nav__cta {
  padding: 9px 16px;
  border: 1.5px solid var(--green);
  border-radius: 999px;
  color: var(--green) !important;
  font-weight: 600 !important;
}

.main-nav__cta:hover {
  background: var(--green);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(0, 129, 12, 0.10), transparent 60%),
    radial-gradient(700px 380px at -10% 110%, rgba(0, 129, 12, 0.08), transparent 60%),
    var(--white);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
  padding-top: 88px;
  padding-bottom: 88px;
}

.hero__eyebrow {
  margin: 0 0 16px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

.hero__title {
  margin: 0 0 22px;
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 800;
}

.hero__title .accent {
  color: var(--green);
}

.hero__lead {
  margin: 0 0 32px;
  max-width: 560px;
  font-size: 1.1rem;
  color: var(--ink-soft);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 34px 30px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--green) 0%, var(--green-deep) 100%);
  color: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero__card-ring {
  position: absolute;
  width: 260px;
  height: 260px;
  border: 28px solid rgba(255, 255, 255, 0.10);
  border-radius: 50%;
  top: -90px;
  right: -80px;
}

.hero__card-stat {
  position: relative;
  z-index: 1;
}

.hero__card-num {
  display: block;
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}

.hero__card-label {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn svg {
  width: 18px;
  height: 18px;
}

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

.btn--primary:hover {
  background: var(--green-dark);
  transform: translateY(-2px);
}

.btn--ghost {
  border: 1.5px solid var(--line);
  color: var(--ink);
  background: #fff;
}

.btn--ghost:hover {
  border-color: var(--green);
  color: var(--green);
}

.btn--large {
  padding: 16px 28px;
  font-size: 1.05rem;
}

/* ---------- Sections ---------- */
.section {
  padding: 88px 0;
}

.section--tint {
  background: var(--green-tint-2);
}

.section-head {
  max-width: 680px;
  margin-bottom: 48px;
}

.section-head__eyebrow {
  margin: 0 0 10px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

.section-head__title {
  margin: 0;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  letter-spacing: -0.02em;
  font-weight: 800;
  line-height: 1.15;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.about-grid__lead {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.about-grid__text p {
  margin: 0 0 16px;
  color: var(--ink-soft);
}

.about-grid__text p:last-child {
  margin-bottom: 0;
}

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

.card {
  padding: 30px 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
  border-color: rgba(0, 129, 12, 0.35);
}

.card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--green-tint);
  color: var(--green);
  margin-bottom: 18px;
}

.card__icon svg {
  width: 26px;
  height: 26px;
}

.card__title {
  margin: 0 0 10px;
  font-size: 1.15rem;
  font-weight: 700;
}

.card__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Symposium ---------- */
.symposium {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.symposium__text {
  margin: 0 0 22px;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.symposium__topics {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.symposium__topics li {
  position: relative;
  padding-left: 26px;
  color: var(--ink-soft);
}

.symposium__topics li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
}

.symposium__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.symposium__visual {
  position: relative;
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.symposium__visual img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.symposium__visual:hover img {
  transform: scale(1.04);
}

.symposium__badge {
  position: absolute;
  bottom: 18px;
  left: 18px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--green-dark);
  font-weight: 700;
  font-size: 0.9rem;
}

/* ---------- Gallery ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.gallery__item {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.gallery__item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.gallery__item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.gallery__item figcaption {
  padding: 14px 16px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.gallery__note {
  margin: 28px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.gallery__note a {
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: #cfd9d2;
  padding: 56px 0 28px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.footer-brand .logo__name {
  display: block;
  font-size: 1.5rem;
  color: #fff;
}

.footer-brand .logo__sub {
  display: block;
  color: #9fb0a5;
  margin-top: 2px;
}

.footer-legal {
  margin: 16px 0 0;
  font-size: 0.85rem;
  color: #8a9a90;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #e6efe8;
  font-weight: 500;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: #6fcf7e;
}

.footer-links svg {
  width: 16px;
  height: 16px;
}

.footer-copy {
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.85rem;
  color: #8a9a90;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .hero__card {
    flex-direction: row;
    gap: 40px;
  }

  .about-grid,
  .symposium {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 12px 24px 20px;
    transform: translateY(-130%);
    transition: transform 0.28s ease;
  }

  .main-nav.is-open {
    transform: translateY(0);
  }

  .main-nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--green-tint);
    font-size: 1.05rem;
  }

  .main-nav__cta {
    text-align: center;
    border: none;
    border-bottom: none;
    margin-top: 8px;
  }

  .nav-toggle {
    display: flex;
  }

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

  .hero__card {
    flex-direction: column;
    gap: 22px;
  }

  .symposium__visual img {
    height: 260px;
  }
}