/* ============================================================
   SMART KITCHEN – Global Styles
   ============================================================ */

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

:root {
  --green-primary: #1a9e5c;
  --green-dark:    #14784a;
  --green-light:   #e8f5ee;
  --green-mid:     #c8edda;
  --green-accent:  #2dc870;
  --text-dark:     #1a1f1e;
  --text-mid:      #374240;
  --text-muted:    #6b7c78;
  --bg-base:       #f4faf7;
  --bg-white:      #ffffff;
  --border-light:  #dff0e8;
  --shadow-sm:     0 2px 12px rgba(26,158,92,0.07);
  --shadow-md:     0 6px 28px rgba(26,158,92,0.12);
  --shadow-lg:     0 16px 48px rgba(26,158,92,0.18);
  --radius-sm:     10px;
  --radius-md:     16px;
  --radius-lg:     24px;
  --transition:    all 0.3s cubic-bezier(0.4,0,0.2,1);
  --font:          'Inter', system-ui, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-dark);
  overflow-x: hidden;
  line-height: 1.6;
}

img { display: block; max-width: 100%; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(200,237,218,0.5);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255,255,255,0.96);
}

.nav-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-dark);
  flex-shrink: 0;
  transition: var(--transition);
}

.nav-logo:hover { opacity: 0.85; }

.logo-icon {
  font-size: 1.3rem;
  filter: drop-shadow(0 1px 2px rgba(26,158,92,0.3));
  animation: float-leaf 3s ease-in-out infinite;
}

@keyframes float-leaf {
  0%, 100% { transform: rotate(-5deg) translateY(0); }
  50%       { transform: rotate(5deg) translateY(-3px); }
}

.logo-text { letter-spacing: -0.3px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-self: center;
}

.nav-link {
  padding: 0.4rem 0.95rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-mid);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%; right: 50%;
  height: 2px;
  background: var(--green-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-link:hover { color: var(--green-primary); background: var(--green-light); }
.nav-link:hover::after { left: 12px; right: 12px; }

.btn-dashboard {
  padding: 0.55rem 1.35rem;
  background: var(--green-primary);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(26,158,92,0.3);
}

.btn-dashboard:hover {
  background: var(--green-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(26,158,92,0.4);
}

.nav-auth-buttons {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.btn-nav-login,
.btn-nav-signup {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.15rem;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}

.btn-nav-login {
  color: var(--text-mid);
  background: transparent;
  border: 1.5px solid #ccddd5;
}

.btn-nav-login:hover {
  border-color: var(--green-primary);
  color: var(--green-primary);
  background: var(--green-light);
}

.btn-nav-signup {
  color: #fff;
  background: var(--green-primary);
  box-shadow: 0 4px 14px rgba(26,158,92,0.3);
}

.btn-nav-signup:hover {
  background: var(--green-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(26,158,92,0.4);
}

.nav-user-area {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-shrink: 0;
}

.nav-user-greeting {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-mid);
  white-space: nowrap;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(145deg, #f0faf5 0%, #e8f5ee 40%, #f7fdfb 70%, #ffffff 100%);
  padding-top: 64px;
}

/* Big circular blobs */
.hero-bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  animation: pulse-blob 8s ease-in-out infinite;
}

.blob-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(26,158,92,0.13) 0%, transparent 70%);
  top: -100px; left: -80px;
  animation-delay: 0s;
}

.blob-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(45,200,112,0.10) 0%, transparent 70%);
  bottom: -60px; right: -60px;
  animation-delay: 4s;
}

@keyframes pulse-blob {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.12); }
}

/* Floating leaf decorations */
.hero-bg-leaf {
  position: absolute;
  font-size: 3.5rem;
  opacity: 0.12;
  pointer-events: none;
  user-select: none;
  animation: drift 10s ease-in-out infinite;
}

.leaf-1 { top: 18%; left: 10%; animation-delay: 0s;   font-size: 5rem; }
.leaf-2 { top: 55%; right: 10%; animation-delay: 3s;  font-size: 4rem; }
.leaf-3 { bottom: 15%; left: 25%; animation-delay: 6s; font-size: 3rem; }

@keyframes drift {
  0%, 100% { transform: rotate(-8deg) translateY(0); }
  50%       { transform: rotate(8deg) translateY(-18px); }
}

/* Decorative circles behind content */
.hero-circle {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(26,158,92,0.1);
  pointer-events: none;
  animation: spin-slow linear infinite;
}

.circle-1 { width: 420px; height: 420px; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-duration: 30s; }
.circle-2 { width: 590px; height: 590px; top: 50%; left: 50%; transform: translate(-50%,-50%); border-style: dashed; animation-duration: 45s; animation-direction: reverse; opacity: 0.5; }
.circle-3 { width: 750px; height: 750px; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-duration: 60s; opacity: 0.3; }

@keyframes spin-slow {
  from { transform: translate(-50%,-50%) rotate(0deg); }
  to   { transform: translate(-50%,-50%) rotate(360deg); }
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 640px;
  padding: 0 1.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 1.1rem;
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--border-light);
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--green-primary);
  margin-bottom: 1.8rem;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  letter-spacing: 0.2px;
}

.badge-icon { font-size: 1rem; }

.hero-title {
  font-size: clamp(2.8rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.12;
  color: var(--text-dark);
  margin-bottom: 1.2rem;
  letter-spacing: -1px;
}

.hero-title-green {
  color: var(--green-primary);
  position: relative;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 460px;
  margin: 0 auto 2.4rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Shared buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.72rem 1.7rem;
  background: var(--green-primary);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(26,158,92,0.35);
  cursor: pointer;
  border: none;
}

.btn-primary:hover {
  background: var(--green-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(26,158,92,0.45);
}

.btn-primary:active { transform: translateY(0); }

.btn-arrow {
  display: inline-block;
  transition: transform 0.3s ease;
}

.btn-primary:hover .btn-arrow { transform: translateX(4px); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.72rem 1.7rem;
  background: transparent;
  color: var(--text-dark);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1.5px solid #ccddd5;
  transition: var(--transition);
  cursor: pointer;
}

.btn-outline:hover {
  border-color: var(--green-primary);
  color: var(--green-primary);
  background: var(--green-light);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
.animate-fade-up {
  opacity: 0;
  transform: translateY(28px);
  animation: fade-up 0.7s ease forwards;
  animation-delay: var(--delay, 0s);
}

@keyframes fade-up {
  to { opacity: 1; transform: translateY(0); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--card-delay, 0s);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   SHARED SECTION STYLES
   ============================================================ */
.section-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
  letter-spacing: -0.5px;
}

.green-text { color: var(--green-primary); }

.section-subtitle {
  font-size: 0.98rem;
  color: var(--text-muted);
  max-width: 460px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1rem;
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--border-light);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-mid);
  letter-spacing: 0.8px;
  margin-bottom: 1.2rem;
  backdrop-filter: blur(8px);
}

/* ============================================================
   IMPACT / STATS SECTION
   ============================================================ */
.impact-section {
  background: var(--bg-white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.stat-card {
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem 1.75rem;
  text-align: left;
  background: var(--bg-white);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--green-light) 0%, transparent 70%);
  opacity: 0;
  transition: var(--transition);
}

.stat-card:hover {
  border-color: rgba(26,158,92,0.3);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.stat-card:hover::before { opacity: 1; }

.stat-icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  position: relative;
}

.stat-number {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--green-primary);
  margin-bottom: 0.3rem;
  position: relative;
  letter-spacing: -0.5px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  position: relative;
}

/* ============================================================
   FEATURES SECTION
   ============================================================ */
.features-section {
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
}

.features-section::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 450px; height: 450px;
  background: radial-gradient(circle, rgba(26,158,92,0.07) 0%, transparent 70%);
  pointer-events: none;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: var(--bg-white);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  transition: var(--transition);
  cursor: default;
}

.feature-card:hover {
  border-color: rgba(26,158,92,0.25);
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

.feature-icon-wrap {
  width: 46px; height: 46px;
  background: var(--green-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  transition: var(--transition);
}

.feature-card:hover .feature-icon-wrap,
.info-card:hover .feature-icon-wrap {
  background: var(--green-mid);
  transform: scale(1.08);
}

.feature-icon { font-size: 1.3rem; }

.feature-title {
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.feature-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ============================================================
   AI / CARBON SECTIONS
   ============================================================ */
.ai-section {
  background: var(--bg-white);
  position: relative;
  overflow: hidden;
}

.ai-bg-blob {
  position: absolute;
  top: -80px; left: -80px;
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(26,158,92,0.08) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
}

.carbon-section {
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
}

.carbon-section::after {
  content: '';
  position: absolute;
  bottom: -80px; right: -80px;
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(26,158,92,0.07) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
}

.three-col-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.info-card {
  background: var(--bg-white);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  transition: var(--transition);
  cursor: default;
}

.info-card:hover {
  border-color: rgba(26,158,92,0.25);
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

/* ============================================================
   SUBSCRIPTIONS (PRICING)
   ============================================================ */
.subscriptions-section {
  background: var(--bg-white);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.pricing-card {
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.2rem 1.75rem;
  background: var(--bg-white);
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  border-color: rgba(26,158,92,0.3);
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.pricing-card-featured {
  border-color: var(--green-primary);
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, #f0faf5 0%, #ffffff 100%);
}

.pricing-card-featured:hover {
  box-shadow: 0 20px 60px rgba(26,158,92,0.22);
}

.pricing-badge {
  display: inline-block;
  padding: 0.25rem 0.85rem;
  background: var(--green-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 50px;
  margin-bottom: 1.2rem;
  letter-spacing: 0.3px;
}

.pricing-tier {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-mid);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-price {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1;
  margin-bottom: 0.25rem;
  letter-spacing: -1px;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0;
}

.pricing-period {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1.8rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.pricing-features li {
  font-size: 0.88rem;
  color: var(--text-mid);
  display: flex;
  gap: 0.5rem;
}

.pricing-features li::first-letter { color: var(--green-primary); }

.pricing-btn {
  width: 100%;
  display: block;
  text-align: center;
  padding: 0.75rem 1.5rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: #0f1a15;
  color: #8ea898;
  padding-top: 3.5rem;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem 2.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: start;
}

.footer-logo .logo-text { color: #fff; }
.footer-logo .logo-icon { filter: none; }

.footer-tagline {
  font-size: 0.88rem;
  margin-top: 0.75rem;
  max-width: 260px;
  line-height: 1.65;
}

.footer-links {
  display: flex;
  gap: 3rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  letter-spacing: 0.3px;
}

.footer-col a {
  font-size: 0.86rem;
  color: #8ea898;
  transition: color 0.2s;
}

.footer-col a:hover { color: var(--green-accent); }

.footer-bottom {
  border-top: 1px solid #1f2e26;
  text-align: center;
  padding: 1.25rem 2rem;
  font-size: 0.82rem;
}

/* ============================================================
   FLOATING CHAT BUTTON
   ============================================================ */
.chat-fab {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  z-index: 900;
  width: 52px; height: 52px;
  background: var(--green-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(26,158,92,0.4);
  transition: var(--transition);
  animation: fab-pulse 2.5s ease-in-out infinite;
}

.chat-fab:hover {
  background: var(--green-dark);
  transform: scale(1.1);
  animation: none;
}

@keyframes fab-pulse {
  0%, 100% { box-shadow: 0 6px 24px rgba(26,158,92,0.4); }
  50%       { box-shadow: 0 6px 32px rgba(26,158,92,0.65); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .stats-grid    { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .three-col-grid { grid-template-columns: 1fr; }
  .pricing-grid  { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .footer-container { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; gap: 2rem; }
}

@media (max-width: 640px) {
  .nav-container { display: flex; justify-content: space-between; }
  .nav-links { display: none; }
  .btn-dashboard { display: none; }
  .nav-auth-buttons { display: none; }
  .nav-user-area { display: none; }
  .hamburger { display: flex; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .features-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; text-align: center; }
  .section-container { padding: 3.5rem 1.25rem; }
  .hero-title { font-size: 2.5rem; }
}