/* =========================================
   NutriBot — Tokens
   ========================================= */
:root{
  --forest: #1B3B2E;
  --forest-light: #284f3d;
  --cream: #F7F3EC;
  --sage: #7FA88C;
  --sage-light: #cfe3d6;
  --coral: #E8896A;
  --charcoal: #2A2A28;
  --line: rgba(27,59,46,0.12);

  --font-display: 'Fraunces', serif;
  --font-body: 'Inter', sans-serif;

  --radius: 14px;
  --max: 1140px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family: var(--font-body);
  color: var(--charcoal);
  background: var(--cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4{
  font-family: var(--font-display);
  color: var(--forest);
  line-height: 1.15;
  margin: 0 0 0.5em;
  font-weight: 600;
}

h1{ font-size: clamp(2.4rem, 5vw, 3.8rem); font-weight: 600; }
h2{ font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3{ font-size: 1.25rem; }

p{ margin: 0 0 1em; }

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

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* =========================================
   Buttons
   ========================================= */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 0.85em 1.8em;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
  border: 2px solid transparent;
}
.btn-primary{
  background: var(--coral);
  color: #fff;
}
.btn-primary:hover{
  background: #d97650;
  transform: translateY(-1px);
}
.btn-ghost{
  border-color: var(--forest);
  color: var(--forest);
  background: transparent;
}
.btn-ghost:hover{
  background: var(--forest);
  color: #fff;
}

/* =========================================
   Header
   ========================================= */
.site-header{
  position: sticky;
  top:0;
  z-index: 50;
  background: rgba(247,243,236,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap: 32px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  color: var(--forest);
  font-family: var(--font-display);
}
.logo-mark{ color: var(--forest); display:flex; }
.logo-text{
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.main-nav{
  display:flex;
  gap: 28px;
  margin-left: auto;
  font-weight: 500;
}
.main-nav a{
  color: var(--charcoal);
  position: relative;
  padding: 4px 0;
}
.main-nav a:hover, .main-nav a.active{
  color: var(--forest);
}
.main-nav a.active::after{
  content:'';
  position:absolute;
  left:0; right:0; bottom:-4px;
  height: 2px;
  background: var(--coral);
  border-radius: 2px;
}
.nav-cta{ flex-shrink:0; }

.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width: 34px;
  height: 34px;
  background:none;
  border:none;
  cursor:pointer;
  margin-left: 8px;
}
.nav-toggle span{
  display:block;
  height: 2px;
  width: 100%;
  background: var(--forest);
  border-radius: 2px;
}

/* =========================================
   Hero
   ========================================= */
.hero{
  padding: 72px 0 48px;
  overflow:hidden;
}
.hero-inner{
  display:grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items:center;
  gap: 48px;
}
.eyebrow{
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--sage);
  margin-bottom: 0.9em;
}
.hero-sub{
  font-size: 1.1rem;
  max-width: 520px;
  color: #4a4a47;
}
.hero-actions{
  display:flex;
  gap: 14px;
  margin-top: 1.6em;
  flex-wrap: wrap;
}
.hero-visual{
  display:flex;
  justify-content:center;
}
.helix{
  max-width: 260px;
  height: auto;
}

/* =========================================
   Sections
   ========================================= */
.section{ padding: 64px 0; }
.section-alt{ background: #EFE9DD; }

.section-head{
  max-width: 640px;
  margin: 0 auto 40px;
  text-align:center;
}
.section-head .eyebrow{ text-align:center; }
.lead{
  font-size: 1.05rem;
  color: #4a4a47;
}

.intro-block{
  max-width: 760px;
  text-align:center;
}
.intro-block h2{ margin-bottom: 0.6em; }

/* =========================================
   Chatbot embed
   ========================================= */
.chatbot-section{ text-align:center; }
.chatbot-frame-wrap{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow:hidden;
  box-shadow: 0 12px 32px rgba(27,59,46,0.08);
  background:#fff;
}
.chatbot-frame{
  width: 100%;
  height: 640px;
  border: none;
  display:block;
}
.chatbot-fallback{
  margin-top: 16px;
  font-size: 0.9rem;
  color: #6b6b66;
}
.chatbot-fallback a{
  font-weight: 600;
  color: var(--coral);
}

/* =========================================
   Cards / Features / News
   ========================================= */
.card-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card{
  background:#fff;
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--line);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.card:hover{
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(27,59,46,0.10);
}
.card-icon{
  width: 52px; height: 52px;
  border-radius: 12px;
  background: var(--sage-light);
  color: var(--forest);
  display:flex; align-items:center; justify-content:center;
  margin-bottom: 18px;
}
.card h3{ margin-bottom: 0.4em; }
.card p{ color:#5a5a55; margin:0; font-size: 0.95rem; }

.feature-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.feature h3{
  border-top: 3px solid var(--coral);
  padding-top: 16px;
  margin-bottom: 0.5em;
}
.feature p{ color:#5a5a55; font-size:0.95rem; }

.news-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card{
  display:block;
  border-radius: var(--radius);
  overflow:hidden;
  background:#fff;
  border: 1px solid var(--line);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.news-card:hover{
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(27,59,46,0.10);
}
.news-thumb{ height: 160px; }
.news-body{ padding: 18px 20px; }
.news-date{
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--sage);
  font-weight: 700;
}
.news-body h3{
  margin: 0.5em 0 0;
  font-size: 1.05rem;
  color: var(--forest);
}
.news-more{
  text-align:center;
  margin-top: 36px;
}

/* =========================================
   CTA band
   ========================================= */
.cta-band{
  background: var(--forest);
  color: #fff;
  padding: 64px 0;
}
.cta-inner{
  text-align:center;
}
.cta-band h2{ color: #fff; }
.cta-band p{ color: var(--sage-light); margin-bottom: 1.4em; }

/* =========================================
   Footer
   ========================================= */
.site-footer{
  background: #15291f;
  color: #d8e3da;
  padding-top: 48px;
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo-text{
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: #fff;
}
.footer-brand p{
  margin-top: 10px;
  max-width: 280px;
  color: #a9bdb1;
  font-size: 0.92rem;
}
.footer-nav{
  display:flex;
  flex-wrap:wrap;
  gap: 20px 28px;
}
.footer-nav a{
  color: #d8e3da;
  font-size: 0.92rem;
}
.footer-nav a:hover{ color: #fff; }
.footer-bottom{
  padding: 20px 0;
  font-size: 0.85rem;
  color: #84988b;
  text-align:center;
}

/* =========================================
   Page header (sub-pages)
   ========================================= */
.page-hero{
  padding: 56px 0 40px;
  text-align:center;
}
.page-hero .eyebrow{ text-align:center; }

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 900px){
  .hero-inner{
    grid-template-columns: 1fr;
    text-align:center;
  }
  .hero-sub{ margin: 0 auto; }
  .hero-actions{ justify-content:center; }
  .hero-visual{ order:-1; }
  .helix{ max-width: 180px; }

  .card-grid, .feature-grid, .news-grid{
    grid-template-columns: 1fr;
  }

  .main-nav{
    position:absolute;
    top: 100%;
    left:0; right:0;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    flex-direction:column;
    gap: 0;
    padding: 8px 24px 16px;
    display:none;
  }
  .main-nav.open{ display:flex; }
  .main-nav a{ padding: 12px 0; border-bottom: 1px solid var(--line); }
  .main-nav a:last-child{ border-bottom:none; }
  .nav-cta{ display:none; }
  .nav-toggle{ display:flex; }

  .chatbot-frame{ height: 520px; }
}

@media (max-width: 520px){
  .header-inner{ gap: 12px; }
  .logo-text{ font-size: 1.1rem; }
  .footer-inner{ flex-direction:column; }
}