/* ============================================================
   Kilimo Website — Design System
   Brand: Material Design 3, Primary green #006d35, Amber accent
   ============================================================ */

:root {
  /* Primary palette */
  --color-primary:           #006d35;
  --color-primary-dark:      #005227;
  --color-primary-light:     #00894a;
  --color-primary-container: #72ffa9;
  --color-on-primary:        #ffffff;

  /* Secondary */
  --color-secondary:         #4e635d;
  --color-secondary-container: #d2e8de;

  /* Tertiary / Accent amber */
  --color-accent:            #f4bf1b;
  --color-accent-dark:       #9a7100;

  /* Neutral surfaces */
  --color-background:        #fcfcf8;
  --color-surface:           #f9f9f5;
  --color-surface-low:       #f1f1ec;
  --color-surface-high:      #e2e2de;

  /* Text */
  --color-text-primary:      #1a1c1a;
  --color-text-secondary:    #464844;
  --color-text-muted:        #707974;

  /* Borders */
  --color-outline:           #707974;
  --color-outline-variant:   #c0c9c2;

  /* Typography */
  --font-family:             'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base:          1rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm:  0.375rem;
  --radius-md:  0.75rem;
  --radius-lg:  1.25rem;
  --radius-xl:  2rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.05);
  --shadow-lg: 0 16px 40px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.06);

  /* Transitions */
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================
   Reset & Base
   ============================================================ */

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background: var(--color-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }

ul { list-style: none; }

/* ============================================================
   Layout
   ============================================================ */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ============================================================
   Navigation
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(252,252,248,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-outline-variant);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: var(--space-8);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.nav-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav-cta {
  background: var(--color-primary) !important;
  color: var(--color-on-primary) !important;
  padding: var(--space-2) var(--space-4) !important;
  border-radius: var(--radius-full) !important;
  border-bottom: none !important;
  font-weight: 600 !important;
  transition: background var(--transition) !important;
}

.nav-cta:hover {
  background: var(--color-primary-dark) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   Hero Section
   ============================================================ */

.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
  color: var(--color-on-primary);
  padding: var(--space-24) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-content { position: relative; }

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}

.hero h1 span {
  color: var(--color-accent);
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.7;
  opacity: 0.88;
  margin-bottom: var(--space-8);
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: center;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-app-graphic {
  position: relative;
  width: 220px;
  height: 440px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255,255,255,0.2);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: #000;
}

.hero-slide {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
}

.hero-slide.active { opacity: 1; }

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-family);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-on-primary);
  color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-container);
  color: var(--color-primary-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--color-on-primary);
  border-color: rgba(255,255,255,0.6);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.9);
  color: var(--color-on-primary);
}

.btn-solid {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

.btn-solid:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-on-primary);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ============================================================
   Section Base
   ============================================================ */

.section {
  padding: var(--space-24) 0;
}

.section-alt {
  background: var(--color-surface);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-16);
}

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   Features Grid
   ============================================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: var(--color-on-primary);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-secondary-container);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.feature-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================================
   Download Section
   ============================================================ */

.download-section {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: var(--color-on-primary);
  padding: var(--space-24) 0;
  text-align: center;
}

.download-section h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.download-section p {
  font-size: 1.0625rem;
  opacity: 0.88;
  margin-bottom: var(--space-8);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.download-badges {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-on-primary);
  color: var(--color-text-primary);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}

.badge:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: var(--color-text-primary);
}

.badge svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.badge-label { text-align: left; }
.badge-label small { display: block; font-size: 0.75rem; font-weight: 400; color: var(--color-text-muted); }

.badge-disabled {
  opacity: 0.6;
  cursor: default;
}

.badge-disabled:hover {
  box-shadow: var(--shadow-sm);
  transform: none;
}

/* ============================================================
   Stats Row
   ============================================================ */

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  text-align: center;
  padding: var(--space-16) 0;
  border-top: 1px solid var(--color-outline-variant);
  border-bottom: 1px solid var(--color-outline-variant);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

/* ============================================================
   Page Hero (inner pages)
   ============================================================ */

.page-hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-outline-variant);
  padding: var(--space-16) 0 var(--space-12);
}

.page-hero h1 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.page-hero p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
}

/* ============================================================
   Prose (Policy page content)
   ============================================================ */

.prose-section {
  padding: var(--space-16) 0 var(--space-24);
}

.prose {
  max-width: 760px;
}

.prose h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.prose h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.prose p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.prose ul {
  list-style: disc;
  margin-left: var(--space-6);
  margin-bottom: var(--space-4);
}

.prose ul li {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  line-height: 1.65;
}

.prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.prose .updated-tag {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
  margin-bottom: var(--space-8);
}

/* ============================================================
   Contact Page
   ============================================================ */

.contact-section {
  padding: var(--space-16) 0 var(--space-24);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--space-12);
  align-items: start;
}

.contact-info h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.contact-info p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.contact-methods { display: flex; flex-direction: column; gap: var(--space-4); }

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-outline-variant);
  background: var(--color-surface);
}

.contact-method-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-secondary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-method-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
}

.contact-method-body h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.contact-method-body p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.contact-method-body a {
  font-size: 0.875rem;
  color: var(--color-primary);
}

/* Contact Form */

.contact-form-card {
  background: var(--color-on-primary);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}

.contact-form-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-6);
}

.form-group { margin-bottom: var(--space-4); }

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  font-family: var(--font-family);
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  background: var(--color-background);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 109, 53, 0.12);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }

.form-submit { margin-top: var(--space-6); }

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  background: var(--color-text-primary);
  color: rgba(255,255,255,0.75);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo { height: 40px; width: auto; object-fit: contain; margin-bottom: var(--space-4); border-radius: var(--radius-sm); }

.footer-brand p {
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 300px;
}

.footer-links h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-4);
}

.footer-links ul { display: flex; flex-direction: column; gap: var(--space-3); }

.footer-links a {
  color: rgba(255,255,255,0.75);
  font-size: 0.9375rem;
  transition: color var(--transition);
}

.footer-links a:hover { color: #ffffff; }

.footer-bottom {
  padding-top: var(--space-8);
  font-size: 0.875rem;
  color: rgba(255,255,255,0.4);
}

.footer-jade {
  margin-top: var(--space-2);
}

.footer-jade a {
  color: rgba(255,255,255,0.55);
  text-decoration: underline;
  text-decoration-color: rgba(255,255,255,0.2);
  text-underline-offset: 2px;
}

.footer-jade a:hover {
  color: rgba(255,255,255,0.85);
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-description { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-image { display: none; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--color-background); border-bottom: 1px solid var(--color-outline-variant); padding: var(--space-4) var(--space-6); gap: var(--space-4); }
  .nav-links.open { display: flex; }
  .nav-links a { border-bottom: none !important; padding: var(--space-2) 0; }
  .nav-toggle { display: flex; }
  .nav { position: relative; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .stats-row { grid-template-columns: 1fr; gap: var(--space-8); }
  .form-row { grid-template-columns: 1fr; }
  .download-badges { flex-direction: column; align-items: center; }
}