:root {
  --primary: #7C9A6D;
  --secondary: #D9E4C7;
  --bg: #ffffff;
  --text: #171717;
  --muted: #4a4a4a;
  --glass: rgba(255, 255, 255, 0.6);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --transition: 220ms ease;
  --font-sans: "Montserrat", "Open Sans", system-ui, sans-serif;
  --font-serif: "Playfair Display", "Georgia", serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.65;
  letter-spacing: 0.2px;
  min-height: 100vh;
  background-image: radial-gradient(circle at 20% 10%, rgba(0,0,0,0.02), transparent 40%), 
                    radial-gradient(circle at 80% 20%, rgba(0,0,0,0.015), transparent 35%),
                    repeating-linear-gradient(45deg, rgba(0,0,0,0.015) 0 1px, transparent 1px 4px);
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-sm);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}

a:hover,
a:focus {
  color: #5f7f54;
  transform: translateY(-1px);
}

header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background-color: var(--glass);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 4vw;
  gap: 1.5rem;
}

.logo {
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  letter-spacing: 0.4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  width: min(72vw, 760px);
  justify-content: space-between;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links > li {
  position: relative;
  flex: 1 1 0;
  text-align: center;
}

.nav-links > li > a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.nav-links > li > a:hover,
.nav-links > li > a:focus {
  background-color: rgba(217, 228, 199, 0.65);
  transform: translateY(-1px);
}

.nav-links .submenu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  display: none;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.6rem;
  background: var(--glass);
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  z-index: 30;
}

.nav-links .submenu a {
  display: block;
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-sm);
  text-align: left;
  color: var(--text);
  font-weight: 500;
}

.nav-links .submenu a:hover,
.nav-links .submenu a:focus {
  background-color: rgba(217, 228, 199, 0.6);
  transform: none;
}

.nav-links li:hover > .submenu,
.nav-links li:focus-within > .submenu {
  display: flex;
}

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border: 0;
  border-radius: 999px;
  background-color: var(--primary);
  color: #ffffff;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
  box-shadow: 0 8px 18px rgba(124, 154, 109, 0.3);
}

button:hover,
.btn:hover {
  background-color: #6b8b5c;
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(124, 154, 109, 0.35);
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--text);
  box-shadow: 0 8px 18px rgba(217, 228, 199, 0.5);
}

.btn-secondary:hover {
  background-color: #cbd9b7;
}

main {
  padding: 2rem 4vw 4rem;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--text);
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
}

p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.hero {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.hero-content {
  grid-column: span 7;
}

.hero-visual {
  grid-column: span 5;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--secondary), #ffffff);
  box-shadow: var(--shadow);
}

.hero-visual .glass {
  background-color: var(--glass);
  border-radius: var(--radius);
  padding: 1.5rem;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.7);
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}

.card {
  background: #ffffff;
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--secondary);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.1);
}

.card.sand {
  background: linear-gradient(180deg, #ffffff, var(--secondary));
}

.card.moss {
  background: linear-gradient(180deg, #ffffff, rgba(124,154,109,0.15));
}

.card.glass {
  background-color: var(--glass);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.7);
}

.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.badge {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background-color: var(--secondary);
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 600;
}

.list {
  padding-left: 1.2rem;
  margin: 0.6rem 0 0;
}

.list li {
  margin-bottom: 0.5rem;
}

.tutorial-steps {
  display: grid;
  gap: 1rem;
}

.step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background-color: rgba(217, 228, 199, 0.35);
  transition: background-color var(--transition);
}

.step:hover {
  background-color: rgba(217, 228, 199, 0.6);
}

.icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--secondary);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text);
}

.footer {
  margin-top: 3rem;
  padding: 2rem 4vw;
  border-top: 1px solid rgba(0,0,0,0.06);
  background-color: #fafafa;
}

.grid-auto {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

input, textarea, select {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0,0,0,0.1);
  background-color: #fff;
  font-family: var(--font-sans);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124,154,109,0.2);
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-content, .hero-visual { grid-column: span 12; }
  .bento { grid-template-columns: 1fr 1fr; }
  .span-4, .span-5, .span-6, .span-7, .span-8 { grid-column: span 2; }
  .nav-links {
    width: 100%;
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .nav { flex-direction: column; gap: 0.75rem; }
  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0.4rem;
  }
  .nav-links > li {
    flex: none;
    width: 100%;
  }
  .nav-links .submenu {
    position: static;
    transform: none;
    box-shadow: none;
    background: rgba(255,255,255,0.9);
    margin-top: 0.4rem;
  }
  .nav-links li:hover > .submenu,
  .nav-links li:focus-within > .submenu {
    display: flex;
  }
  .bento { grid-template-columns: 1fr; }
  .span-4, .span-5, .span-6, .span-7, .span-8, .span-12 { grid-column: span 1; }
}

/* Species filter section (scoped) */
.species-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.5rem 0 2rem;
}

.species-filter__btn {
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(124,154,109,0.35);
  background: linear-gradient(135deg, #ffffff, rgba(217,228,199,0.6));
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
  box-shadow: 0 6px 16px rgba(124,154,109,0.15);
}

.species-filter__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(124,154,109,0.2);
}

.species-filter__btn.is-active {
  background: linear-gradient(135deg, rgba(124,154,109,0.2), rgba(124,154,109,0.35));
  border-color: rgba(124,154,109,0.6);
  color: #2e3b2a;
}

.species-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.species-card {
  background: linear-gradient(180deg, #ffffff, rgba(217,228,199,0.5));
  border-radius: var(--radius);
  padding: 1.4rem;
  border: 1px solid rgba(0,0,0,0.05);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.species-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(0,0,0,0.1);
}

.species-card__icon svg {
  width: 48px;
  height: 48px;
  display: block;
}

.species-modal {
  position: fixed;
  inset: 0;
  background: rgba(23,23,23,0.4);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 50;
}

.species-modal.is-open {
  display: flex;
}

.species-modal__content {
  max-width: 720px;
  width: 100%;
  background: var(--glass);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid rgba(255,255,255,0.7);
  box-shadow: var(--shadow);
  position: relative;
}

.species-modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  border: 0;
  background: rgba(255,255,255,0.8);
  border-radius: 999px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 14px rgba(0,0,0,0.12);
}