@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@400;500;600;700&display=swap');

:root {
  /* Color Palette - Forest & Terracotta (No AI purple or default brass/cream) */
  --bg-primary: hsl(140, 15%, 98%);
  --bg-secondary: hsl(140, 18%, 94%);
  --text-primary: hsl(154, 45%, 12%);
  --text-secondary: hsl(145, 12%, 38%);
  --accent: hsl(20, 60%, 48%);
  --accent-hover: hsl(20, 65%, 42%);
  --accent-light: hsla(20, 60%, 48%, 0.1);
  --border-color: rgba(15, 46, 30, 0.08);
  --shadow-tinted: 0 10px 30px -10px hsla(154, 45%, 12%, 0.08);
  --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.6);
  
  /* Layout & Typography */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Shape Consistency Lock */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* Animations */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

body {
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography Rules */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
  line-height: 1.6;
}

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

/* Page Layout */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation - Single Line, Fixed Height */
.navbar {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  background-color: rgba(252, 251, 249, 0.85);
  backdrop-filter: blur(12px);
  z-index: 100;
  transition: var(--transition-smooth);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: var(--transition-smooth);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Premium Buttons & Interactive States */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px -4px var(--accent);
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-secondary);
  transform: translateY(-2px);
}

/* Active click physics simulation */
.btn:active {
  transform: scale(0.96) translateY(0);
}

/* Cart Button Badge */
.cart-btn-wrapper {
  position: relative;
}

.mobile-menu-toggle {
  display: none;
  font-size: 1.25rem;
}

.cart-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  background-color: var(--accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0);
  transition: var(--transition-smooth);
}

.cart-badge.active {
  transform: scale(1);
}

/* Viewport stable Hero section */
.hero {
  min-h: 100dvh;
  display: grid;
  grid-template-cols: 1fr 1fr;
  align-items: center;
  gap: 4rem;
  padding-top: 1rem;
  padding-bottom: 2rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}

.hero-headline {
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  color: var(--text-primary);
  line-height: 1.05;
}

.hero-headline span {
  font-style: italic;
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--accent);
}

.hero-subtext {
  font-size: 1.1rem;
  max-width: 42ch;
}

.hero-cta {
  display: flex;
  gap: 1rem;
}

.hero-visual {
  width: 100%;
  height: 540px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-tinted);
  border: 1px solid var(--border-color);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 8s ease;
}

.hero-visual:hover img {
  transform: scale(1.04);
}

/* Sections */
.section {
  padding: 6rem 0;
  border-top: 1px solid var(--border-color);
}

.section-header {
  max-width: 650px;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

/* Regional Plant Explorer */
.region-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: none;
}

.region-tabs::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.tab-btn:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.tab-btn.active {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.plants-grid {
  display: grid;
  grid-template-cols: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.plant-card {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.plant-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-tinted);
}

.plant-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex-grow: 1;
}

.plant-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.plant-region {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  background-color: var(--accent-light);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.plant-difficulty {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.plant-name {
  font-size: 1.35rem;
  color: var(--text-primary);
}

.plant-scientific {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--text-secondary);
  margin-top: -0.5rem;
}

.plant-benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.benefit-tag {
  font-size: 0.75rem;
  background-color: rgba(15, 46, 30, 0.04);
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.plant-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  line-height: 1.5;
}

.plant-action {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid rgba(15, 46, 30, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.plant-price {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Interactive Matcher Quiz Section */
.matcher-container {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 3.5rem;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: var(--shadow-tinted);
  position: relative;
  overflow: hidden;
}

.quiz-progress {
  height: 4px;
  background-color: rgba(15, 46, 30, 0.06);
  border-radius: var(--radius-full);
  margin-bottom: 2.5rem;
  position: relative;
}

.quiz-progress-bar {
  height: 100%;
  width: 33.33%;
  background-color: var(--accent);
  border-radius: var(--radius-full);
  transition: var(--transition-smooth);
}

.quiz-slide {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.quiz-slide.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.quiz-question {
  font-size: 1.6rem;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.quiz-options {
  display: grid;
  grid-template-cols: 1fr;
  gap: 1rem;
}

@media(min-width: 640px) {
  .quiz-options {
    grid-template-cols: repeat(3, 1fr);
  }
}

.option-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
}

.option-card:hover {
  border-color: var(--text-primary);
  transform: translateY(-2px);
}

.option-card.selected {
  border-color: var(--accent);
  background-color: var(--accent-light);
}

.option-icon {
  font-size: 1.5rem;
  color: var(--accent);
}

.option-title {
  font-size: 1rem;
  font-weight: 600;
}

.quiz-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
}

/* Quiz Result Card */
.result-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.result-badge {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--accent);
}

.result-title {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.result-plant {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

/* Ecological Calculator */
.calculator-split {
  display: grid;
  grid-template-cols: 1fr;
  gap: 4rem;
  align-items: center;
}

@media(min-width: 1024px) {
  .calculator-split {
    grid-template-cols: 1.2fr 0.8fr;
  }
}

.calc-sliders {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-label {
  font-size: 1.1rem;
  font-weight: 600;
}

.slider-value {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
}

.range-input {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: rgba(15, 46, 30, 0.08);
  outline: none;
  transition: var(--transition-fast);
}

.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  transition: var(--transition-fast);
}

.range-input::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.calc-results {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 3rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  box-shadow: var(--shadow-tinted);
}

.stat-box {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-val {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.stat-lbl {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Beautiful Bento Section for Ecological Awareness */
.bento-grid {
  display: grid;
  grid-template-cols: 1fr;
  gap: 1.5rem;
}

@media(min-width: 768px) {
  .bento-grid {
    grid-template-cols: repeat(3, 1fr);
    grid-template-rows: auto auto;
  }
}

.bento-cell {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
  transition: var(--transition-smooth);
}

.bento-cell:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-tinted);
}

.bento-cell-1 {
  grid-column: span 1;
}

.bento-cell-2 {
  grid-column: span 1;
}

.bento-cell-3 {
  grid-column: span 1;
}

@media(min-width: 768px) {
  .bento-cell-1 {
    grid-column: span 2;
  }
  .bento-cell-2 {
    grid-column: span 1;
  }
  .bento-cell-3 {
    grid-column: span 3;
    flex-direction: row;
    align-items: center;
  }
}

.bento-cell-image {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  background-image: linear-gradient(135deg, rgba(20, 60, 40, 0.8), rgba(15, 46, 30, 0.95)), url('nursery.png');
  background-size: cover;
  background-position: center;
  border-color: transparent;
}

.bento-cell-image p {
  color: rgba(252, 251, 249, 0.7);
}

.bento-cell-image h3 {
  color: #fff;
  font-size: 1.8rem;
}

/* Nursery section with cart checkout */
.cart-panel {
  position: fixed;
  top: 0;
  right: -420px;
  width: 100%;
  max-width: 420px;
  height: 100vh;
  background-color: var(--bg-primary);
  border-left: 1px solid var(--border-color);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.cart-panel.open {
  right: 0;
}

.cart-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cart-title {
  font-size: 1.25rem;
}

.close-cart-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--text-secondary);
}

.cart-items {
  flex-grow: 1;
  overflow-y: auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.cart-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.cart-item-info {
  display: flex;
  flex-direction: column;
}

.cart-item-name {
  font-weight: 600;
}

.cart-item-price {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.remove-item-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
}

.cart-footer {
  padding: 2rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.cart-total-row {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1.1rem;
}

/* Modal Checkout Simulator */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(15, 46, 30, 0.4);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.modal-overlay.open {
  display: flex;
}

.modal-content {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-tinted);
  text-align: center;
  position: relative;
  animation: modalScale 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes modalScale {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.checkout-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(20, 60, 40, 0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.checkout-success {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.success-icon {
  font-size: 3rem;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Footer styling */
.footer {
  padding: 4rem 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}

.footer-text {
  font-size: 0.9rem;
  max-width: 40ch;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Responsive grid collapsing rules */
@media(max-width: 768px) {
  .container {
    padding: 0 1.25rem;
  }

  .mobile-menu-toggle {
    display: inline-flex;
    padding: 0;
    width: 42px;
    height: 42px;
    justify-content: center;
    align-items: center;
  }

  #cart-toggle-btn {
    padding: 0;
    width: 42px;
    height: 42px;
    justify-content: center;
    align-items: center;
  }

  .nav-links {
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    height: calc(100vh - 76px);
    background-color: rgba(252, 251, 249, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 1.5rem;
    font-family: var(--font-display);
    font-weight: 600;
  }

  /* Cascading Menu Animations */
  .nav-links.open li {
    animation: slideUpIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
  }
  
  .nav-links.open li:nth-child(1) { animation-delay: 0.1s; }
  .nav-links.open li:nth-child(2) { animation-delay: 0.15s; }
  .nav-links.open li:nth-child(3) { animation-delay: 0.2s; }
  .nav-links.open li:nth-child(4) { animation-delay: 0.25s; }

  @keyframes slideUpIn {
    from {
      opacity: 0;
      transform: translateY(24px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .hero {
    grid-template-cols: 1fr;
    gap: 2.5rem;
    min-height: auto;
    padding-top: 3rem;
  }

  .hero-visual {
    height: 360px;
  }

  .hero-cta {
    width: 100%;
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .section {
    padding: 4rem 0;
  }

  .plants-grid {
    grid-template-cols: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
  }

  .matcher-container {
    padding: 2rem 1.25rem;
    border-radius: var(--radius-md);
  }

  .quiz-question {
    font-size: 1.35rem;
    text-align: center;
    margin-bottom: 1.5rem;
  }

  .option-card {
    padding: 1.25rem 1rem;
  }

  .quiz-navigation {
    margin-top: 2rem;
    flex-direction: column;
    gap: 1rem;
  }

  .quiz-navigation .btn {
    width: 100%;
  }

  .calculator-split {
    gap: 2rem;
  }

  .calc-results {
    padding: 2rem 1.25rem;
  }

  .bento-cell {
    padding: 1.75rem;
  }

  .bento-cell-3 {
    flex-direction: column;
    align-items: flex-start;
  }

  .bento-cell-3 .btn {
    width: 100%;
    margin-top: 1rem;
  }

  .modal-content {
    width: calc(100% - 2.5rem);
    padding: 2.5rem 1.5rem;
  }
}