/* ============================================================
   AgriZero AI — Main Stylesheet
   Design: clean agritech, mobile-first, light and professional
   ============================================================ */

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

:root {
  --color-bg:           #F8F5EC;
  --color-surface:      #FFFFFF;
  --color-primary:      #0F766E;
  --color-primary-dark: #115E59;
  --color-accent:       #84CC16;
  --color-soil:         #8B5E34;
  --color-text:         #1F2933;
  --color-muted:        #667085;
  --color-border:       #E5E7EB;
  --color-teal-light:   #F0FDFA;
  --color-cream:        #FAF7F0;

  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 4px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-lg: 0 4px 24px rgba(0,0,0,0.10);

  --max-w: 1180px;
  --section-py: 4rem;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }

/* --- Container --- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --- Typography --- */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--color-text); }
h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: 1.125rem; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.text-muted { color: var(--color-muted); font-size: 0.9375rem; }
.text-green  { color: var(--color-primary); }
.text-yellow { color: #B45309; }
.text-red    { color: #B91C1C; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.12s;
  line-height: 1.3;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn--primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); }
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover { background: var(--color-primary); color: #fff; }
.btn--sm { padding: 0.45rem 1rem; font-size: 0.875rem; }
.btn--full { width: 100%; }

/* --- Section base --- */
.section { padding: var(--section-py) 0; }
.bg-teal-light { background: var(--color-teal-light); }
.bg-cream      { background: var(--color-cream); }

/* --- Section Header --- */
.section-header { text-align: center; margin-bottom: 2.5rem; }
.section-header--left { text-align: left; }
.section-header h2 { margin-bottom: 0.5rem; }
.section-subtitle { color: var(--color-muted); font-size: 1.0625rem; max-width: 680px; margin: 0 auto; }
.section-header--left .section-subtitle { margin: 0; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}
.site-header__logo { display: flex; flex-direction: column; line-height: 1.15; text-decoration: none; }
.logo-main { font-size: 1.2rem; font-weight: 800; color: var(--color-primary); letter-spacing: -0.02em; }
.logo-by   { font-size: 0.7rem; color: var(--color-muted); font-weight: 500; }

.main-nav__list {
  display: flex;
  gap: 0.25rem;
  align-items: center;
  flex-wrap: nowrap;
}
.main-nav__list a {
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0.65rem;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.main-nav__list a:hover,
.main-nav__list a[aria-current="page"] {
  background: var(--color-teal-light);
  color: var(--color-primary);
}
.main-nav__list a.nav-cta {
  background: var(--color-primary);
  color: #fff;
  padding: 0.4rem 0.9rem;
}
.main-nav__list a.nav-cta:hover { background: var(--color-primary-dark); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: linear-gradient(135deg, #EFF9F7 0%, var(--color-bg) 100%);
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--color-border);
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.hero__headline { font-size: clamp(1.9rem, 4vw, 2.9rem); color: var(--color-text); margin-bottom: 1rem; }
.hero__sub { font-size: 1.125rem; color: var(--color-muted); margin-bottom: 1.75rem; }
.hero__actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.hero__trust { font-size: 0.875rem; color: var(--color-muted); }
.hero__trust a { color: var(--color-soil); font-weight: 600; }

/* Hero diagram */
.hero-diagram {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  align-items: center;
}
.hero-diagram__center {
  grid-column: 1 / -1;
  text-align: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  padding: 1rem;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.4;
  order: -1;
}
.hero-diagram__item {
  background: var(--color-teal-light);
  border: 1px solid #A7F3D0;
  border-radius: var(--radius);
  padding: 0.75rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

/* ============================================================
   STATS
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--color-primary);
}
.stat-card__value { font-size: 2rem; font-weight: 800; color: var(--color-primary); line-height: 1; margin-bottom: 0.5rem; }
.stat-card__label { font-weight: 700; margin-bottom: 0.4rem; }
.stat-card__note  { font-size: 0.875rem; color: var(--color-muted); }

/* ============================================================
   PILLARS
   ============================================================ */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.pillar-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border-bottom: 3px solid var(--color-accent);
  transition: transform 0.2s;
}
.pillar-card:hover { transform: translateY(-3px); }
.pillar-card__number { font-size: 2rem; font-weight: 900; color: var(--color-accent); line-height: 1; margin-bottom: 0.5rem; }
.pillar-card__title  { font-size: 1rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--color-primary-dark); }
.pillar-card__body   { font-size: 0.9rem; color: var(--color-muted); margin: 0; }

/* ============================================================
   TECHNOLOGY TABLE
   ============================================================ */
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); }
.tech-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  font-size: 0.9375rem;
}
.tech-table th {
  background: var(--color-primary);
  color: #fff;
  padding: 0.85rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
}
.tech-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.tech-table tbody tr:last-child td { border-bottom: none; }
.tech-table tbody tr:hover { background: var(--color-teal-light); }
.badge {
  display: inline-block;
  background: #DCFCE7;
  color: #166534;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
}
.table-cta { margin-top: 1.5rem; }

.compare-table th:not(:first-child),
.compare-table td:not(:first-child) { text-align: center; }

/* ============================================================
   CASE STUDY CARDS
   ============================================================ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.case-grid--full { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
.case-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: transform 0.2s;
}
.case-card:hover { transform: translateY(-3px); }
.case-card__tag { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-primary); }
.case-card__title { font-size: 1.05rem; font-weight: 700; margin: 0; }
.case-card__summary { font-size: 0.9rem; color: var(--color-muted); margin: 0; }
.case-card__impact { font-size: 0.875rem; background: #DCFCE7; color: #166534; padding: 0.4rem 0.75rem; border-radius: 6px; }
.case-card__impact-label { font-weight: 700; }
.case-card__why { font-size: 0.875rem; color: var(--color-muted); margin: 0; }

/* ============================================================
   STEPS / ROADMAP
   ============================================================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.step-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  text-align: center;
}
.step-card__num {
  width: 48px; height: 48px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem; font-weight: 800;
  margin: 0 auto 1rem;
}
.step-card h3 { font-size: 0.9375rem; margin-bottom: 0.4rem; }
.step-card p  { font-size: 0.875rem; color: var(--color-muted); margin: 0; }

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  background: var(--color-primary);
  padding: 3.5rem 0;
  text-align: center;
}
.cta-section__headline { color: #fff; font-size: clamp(1.25rem, 2.5vw, 1.8rem); margin-bottom: 1.5rem; }
.cta-section__buttons  { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.cta-section .btn--outline { border-color: rgba(255,255,255,0.6); color: #fff; }
.cta-section .btn--outline:hover { background: rgba(255,255,255,0.15); }

/* ============================================================
   PAGE HERO
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, var(--color-teal-light) 0%, #F0FAF9 100%);
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--color-border);
}
.page-hero h1 { margin-bottom: 0.75rem; }
.page-hero__sub { font-size: 1.0625rem; color: var(--color-muted); max-width: 700px; margin: 0; }

/* ============================================================
   TECHNOLOGY DETAIL
   ============================================================ */
.tech-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.tech-detail-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.tech-detail-card h3 { font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-primary); margin-bottom: 0.6rem; }
.tech-detail-card p, .tech-detail-card ul { font-size: 0.9rem; color: var(--color-muted); }
.tech-detail-card ul { list-style: disc; padding-left: 1.25rem; }
.tech-detail-card ul li { margin-bottom: 0.3rem; }

/* ============================================================
   INSIGHT BLOCK
   ============================================================ */
.insight-block {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow);
  max-width: 800px;
  margin: 0 auto;
}
.insight-block h2 { margin-bottom: 1rem; }
.insight-list { list-style: none; margin: 1rem 0; }
.insight-list li { padding: 0.5rem 0; border-bottom: 1px solid var(--color-border); font-size: 0.9375rem; }
.insight-list li:last-child { border-bottom: none; }

/* ============================================================
   FARMER SECTIONS
   ============================================================ */
.farmer-intro .intro-text {
  font-size: 1.125rem;
  color: var(--color-primary-dark);
  font-weight: 500;
  border-left: 4px solid var(--color-accent);
  padding-left: 1.25rem;
  max-width: 720px;
}
.farmer-section { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; margin-top: 1.5rem; align-items: start; }
.farmer-section__content h3 { margin: 1.25rem 0 0.5rem; color: var(--color-primary-dark); }
.guide-list { list-style: disc; padding-left: 1.5rem; margin: 0.5rem 0; }
.guide-list li { margin-bottom: 0.5rem; font-size: 0.9375rem; }
.tip-box {
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.tip-box__label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; opacity: 0.8; margin-bottom: 0.5rem; }
.tip-box p { color: #fff; margin: 0; font-size: 0.95rem; }

.record-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; margin-top: 1rem; }
.record-card { background: var(--color-surface); border-radius: var(--radius); padding: 1rem 1.25rem; box-shadow: var(--shadow); }
.record-card strong { display: block; color: var(--color-primary); font-size: 0.875rem; margin-bottom: 0.25rem; }
.record-card p { font-size: 0.8125rem; color: var(--color-muted); margin: 0; }

/* ============================================================
   TOOLS
   ============================================================ */
.tool-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
}
.coming-soon-card { border: 2px dashed var(--color-border); }
.coming-soon-badge {
  display: inline-block;
  background: #FEF3C7;
  color: #92400E;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.75rem;
  border-radius: 99px;
  margin-bottom: 1rem;
}
.estimator-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.estimator-form fieldset { border: none; margin-bottom: 1.25rem; }
.estimator-form legend { font-weight: 600; margin-bottom: 0.6rem; font-size: 0.9375rem; }
.checkbox-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 0.5rem; }
.checkbox-label { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; cursor: pointer; }
.tool-card__results { margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--color-border); }
.tool-card__results h3 { margin-bottom: 1rem; }
.result-rows { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 1.25rem; }
.result-row { display: flex; align-items: center; gap: 1rem; }
.result-row__label { flex: 0 0 220px; font-size: 0.9rem; font-weight: 500; }
.result-row__bar-wrap { flex: 1; background: var(--color-border); border-radius: 99px; height: 10px; }
.result-row__bar { background: var(--color-primary); height: 10px; border-radius: 99px; transition: width 0.5s ease; }
.result-row__value { flex: 0 0 80px; text-align: right; font-size: 0.875rem; font-weight: 700; color: var(--color-primary); }

/* Timeline */
.timeline-wrap { display: flex; flex-direction: column; gap: 0; position: relative; }
.timeline-wrap::before { content: ''; position: absolute; left: 24px; top: 0; bottom: 0; width: 2px; background: var(--color-border); }
.timeline-stage { display: flex; gap: 1.5rem; padding: 1.5rem 0; position: relative; }
.timeline-stage__icon {
  flex: 0 0 48px; height: 48px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.125rem;
  position: relative; z-index: 1;
}
.timeline-stage__content h3 { margin-bottom: 0.4rem; }
.timeline-stage__content p  { font-size: 0.9rem; color: var(--color-muted); margin-bottom: 0.5rem; }
.timeline-tag {
  display: inline-block;
  background: var(--color-teal-light);
  color: var(--color-primary);
  font-size: 0.75rem; font-weight: 700;
  padding: 0.15rem 0.6rem;
  border-radius: 99px;
  text-transform: uppercase; letter-spacing: 0.04em;
}

/* App cards */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.app-card { background: var(--color-surface); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow); }
.app-card__name { font-size: 1.1rem; font-weight: 800; color: var(--color-primary); margin-bottom: 0.5rem; }
.app-card p { font-size: 0.875rem; color: var(--color-muted); margin-bottom: 0.75rem; }
.app-card__meta { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.app-card__meta span { background: var(--color-teal-light); color: var(--color-primary); font-size: 0.75rem; font-weight: 600; padding: 0.2rem 0.6rem; border-radius: 99px; }

/* ============================================================
   RESEARCH
   ============================================================ */
.research-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.research-card { background: var(--color-surface); border-radius: var(--radius-lg); padding: 2rem; box-shadow: var(--shadow); }
.research-card h2 { font-size: 1.25rem; margin-bottom: 0.75rem; color: var(--color-primary-dark); }
.research-card p  { font-size: 0.9375rem; }
.research-card__topics { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1rem; }
.research-card__topics span { background: #F3F4F6; color: var(--color-muted); font-size: 0.8rem; padding: 0.2rem 0.6rem; border-radius: 99px; }
.research-list { list-style: disc; padding-left: 1.5rem; }
.research-list li { font-size: 0.9375rem; margin-bottom: 0.4rem; }

/* ============================================================
   ABOUT
   ============================================================ */
.about-split { display: grid; grid-template-columns: 3fr 2fr; gap: 3rem; align-items: start; }
.about-split__text h2 { margin-bottom: 1rem; }
.about-stat-block { background: var(--color-surface); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow); margin-bottom: 1rem; border-left: 4px solid var(--color-accent); }
.about-stat-block__number { font-size: 2.25rem; font-weight: 900; color: var(--color-primary); }
.about-stat-block__label  { font-size: 0.875rem; color: var(--color-muted); margin-top: 0.25rem; }
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; margin-top: 1.5rem; }
.why-card { background: var(--color-surface); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow); }
.why-card__icon { font-size: 1.5rem; font-weight: 900; color: var(--color-accent); margin-bottom: 0.5rem; }
.why-card h3 { font-size: 1rem; margin-bottom: 0.5rem; }
.why-card p  { font-size: 0.9rem; color: var(--color-muted); margin: 0; }
.roadmap-list { display: flex; flex-direction: column; gap: 0; }
.roadmap-item { display: grid; grid-template-columns: 160px 1fr; gap: 1.5rem; padding: 1.5rem 0; border-bottom: 1px solid var(--color-border); align-items: start; }
.roadmap-item:last-child { border-bottom: none; }
.roadmap-item__phase { font-weight: 800; color: var(--color-primary); font-size: 0.9375rem; }
.roadmap-item__body h3 { font-size: 1rem; margin-bottom: 0.5rem; }
.roadmap-item__body ul { list-style: disc; padding-left: 1.25rem; }
.roadmap-item__body ul li { font-size: 0.9rem; color: var(--color-muted); margin-bottom: 0.3rem; }
.parent-block { max-width: 560px; }
.parent-block h2 { margin-bottom: 0.75rem; }
.parent-block p { margin-bottom: 1rem; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-layout { display: grid; grid-template-columns: 3fr 2fr; gap: 3rem; align-items: start; }
.contact-form-area h2 { margin-bottom: 0.5rem; }
.contact-info-card { background: var(--color-surface); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow); margin-bottom: 1rem; }
.contact-info-card h3 { margin-bottom: 0.75rem; font-size: 1rem; }
.contact-audience-list li { font-size: 0.875rem; margin-bottom: 0.5rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--color-border); }
.contact-audience-list li:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

/* ============================================================
   FORMS
   ============================================================ */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.9rem; font-weight: 600; margin-bottom: 0.4rem; }
.required { color: #B91C1C; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(15,118,110,0.12);
}
.form-notice { background: #FEF3C7; border-radius: var(--radius); padding: 0.75rem 1rem; margin-bottom: 1rem; font-size: 0.875rem; color: #92400E; }
.form-success-notice { background: #D1FAE5; border: 1px solid #6EE7B7; border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1.5rem; color: #065F46; font-size: 0.9375rem; }
.form-success-notice strong { display: block; margin-bottom: 0.25rem; }
.form-error-list { background: #FEE2E2; border: 1px solid #FCA5A5; border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1.25rem; color: #991B1B; font-size: 0.9rem; }
.form-error-list ul { margin: 0.5rem 0 0 1.25rem; }
.form-error-list ul li { margin-bottom: 0.25rem; }
.hp-field { position: absolute; left: -9999px; top: -9999px; visibility: hidden; }
.required { color: var(--color-primary); }
.disclaimer-text { font-size: 0.8125rem; color: var(--color-muted); margin-top: 1rem; font-style: italic; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--color-text); color: rgba(255,255,255,0.8); margin-top: 0; }
.site-footer__inner { display: grid; grid-template-columns: 2fr 1fr 1.5fr; gap: 2rem; padding: 3rem 1.25rem 2rem; max-width: var(--max-w); margin: 0 auto; }
.footer-brand__name { font-size: 1.2rem; font-weight: 800; color: #fff; }
.footer-brand__by { font-size: 0.8rem; margin-bottom: 0.5rem; }
.footer-brand__by a { color: var(--color-accent); }
.footer-brand__tagline { font-size: 0.875rem; color: rgba(255,255,255,0.6); }
.site-footer h3 { color: #fff; font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 1rem; }
.footer-nav ul { list-style: none; }
.footer-nav ul li { margin-bottom: 0.4rem; }
.footer-nav ul a { color: rgba(255,255,255,0.7); font-size: 0.875rem; text-decoration: none; }
.footer-nav ul a:hover { color: var(--color-accent); }
.footer-contact p { font-size: 0.875rem; margin-bottom: 1rem; }
.footer-contact__parent { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-top: 0.75rem; }
.footer-contact__parent a { color: var(--color-accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 1.25rem 0; }
.footer-bottom .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem; }
.footer-disclaimer { font-size: 0.8rem; color: rgba(255,255,255,0.5); max-width: 520px; }
.footer-copy { font-size: 0.8rem; color: rgba(255,255,255,0.45); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .pillars-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-detail-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .about-split { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --section-py: 2.5rem; }
  body { font-size: 16px; }

  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    z-index: 99;
  }
  .main-nav.is-open { display: block; }
  .main-nav__list { flex-direction: column; gap: 0.25rem; }
  .main-nav__list a { display: block; padding: 0.6rem 0.75rem; border-radius: 6px; }

  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
  .stats-grid { grid-template-columns: 1fr; gap: 1rem; }
  .pillars-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-detail-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr 1fr; }
  .research-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .farmer-section { grid-template-columns: 1fr; }
  .roadmap-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .about-split__stat { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
  .estimator-form .form-row { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .footer-bottom .container { flex-direction: column; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  h1 { font-size: 1.7rem; }
  .steps-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr; }
  .about-split__stat { grid-template-columns: 1fr; }
}

/* ── Contact form: Phase 1 submit notice ───────────────────── */
.form-submit-notice {
  background: #FEF3C7;
  border: 1px solid #FCD34D;
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: #78350F;
  line-height: 1.5;
}
.form-submit-notice a { color: var(--color-primary); font-weight: 600; }

/* ── Estimator result row variants ─────────────────────────── */
.result-row--combined {
  border-top: 1px solid var(--color-border);
  padding-top: 0.75rem;
  margin-top: 0.5rem;
}
.result-row__bar--accent  { background: var(--color-accent); }
.result-row__value--accent { color: var(--color-soil); }