/* ==========================================================================
   AUN Fiber Lanka — global styles (design system v2)
   ========================================================================== */

:root {
  /* Brand colors */
  --color-coir: #6b4226;
  --color-coir-dark: #3d2414;
  --color-leaf: #3f7d43;
  --color-leaf-dark: #244f28;
  --color-cream: #faf7f0;
  --color-sand: #f1e8d6;
  --color-ink: #221d18;
  --color-muted: #6c6157;
  --color-muted-2: #948a7d;
  --color-white: #ffffff;
  --color-border: #e7dcc7;

  /* Elevation */
  --shadow-xs: 0 1px 3px rgba(34, 29, 24, 0.06);
  --shadow-sm: 0 4px 12px rgba(34, 29, 24, 0.08);
  --shadow-md: 0 10px 28px rgba(34, 29, 24, 0.10);
  --shadow-lg: 0 24px 56px rgba(34, 29, 24, 0.16);
  --focus-ring: 0 0 0 3px rgba(63, 125, 67, 0.35);

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Radius scale */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --radius: var(--radius-md); /* legacy alias */

  --max-width: 1200px;
  --font-head: "Poppins", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition: 220ms var(--ease);
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-cream);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

::selection { background: var(--color-leaf); color: var(--color-white); }

a { color: var(--color-leaf-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-leaf); }

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--color-coir-dark);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2.1rem, 1.5rem + 2.6vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.5rem); }
h3 { font-size: 1.28rem; }

p { margin: 0 0 1em; color: var(--color-muted); }
p:last-child { margin-bottom: 0; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 32px);
}

.section { padding: clamp(56px, 8vw, 100px) 0; }
.section--tight { padding: clamp(40px, 5vw, 64px) 0; }
.section--sand { background: var(--color-sand); }
.section--dark {
  background: linear-gradient(135deg, var(--color-coir-dark), var(--color-leaf-dark) 120%);
  color: var(--color-white);
}
.section--dark h2, .section--dark h3, .section--dark p { color: var(--color-white); }
.section--dark p { color: rgba(255,255,255,0.82); }
.section--dark .eyebrow { color: #cfe8d1; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-leaf-dark);
  margin-bottom: 0.85em;
}
.eyebrow::before {
  content: "";
  width: 18px; height: 2px;
  background: currentColor;
  border-radius: 2px;
  opacity: 0.6;
}

.section-head { max-width: 680px; margin: 0 0 var(--space-7); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow::before { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: var(--radius-pill);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}
.btn-primary { background: var(--color-leaf-dark); color: var(--color-white); box-shadow: var(--shadow-xs); }
.btn-primary:hover { background: var(--color-leaf); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { border-color: rgba(255,255,255,0.7); color: var(--color-white); }
.btn-outline:hover { background: var(--color-white); color: var(--color-coir-dark); border-color: var(--color-white); transform: translateY(-2px); }
.btn-outline-dark { border-color: var(--color-coir-dark); color: var(--color-coir-dark); }
.btn-outline-dark:hover { background: var(--color-coir-dark); color: var(--color-white); transform: translateY(-2px); }

/* ---------- Topbar ---------- */
.topbar {
  background: var(--color-coir-dark);
  color: #ddc9ac;
  font-size: 0.82rem;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 9px;
  padding-bottom: 9px;
  gap: 16px;
  flex-wrap: wrap;
}
.topbar a { color: #ddc9ac; }
.topbar a:hover { color: var(--color-white); }
.topbar-contacts { display: flex; gap: 24px; flex-wrap: wrap; }
.topbar-social { display: flex; gap: 16px; }
.topbar-social a { font-weight: 600; font-size: 0.78rem; letter-spacing: 0.02em; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 247, 240, 0.98);
  box-shadow: 0 1px 0 rgba(34,29,24,0.06);
  transition: box-shadow var(--transition), background var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }

@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  /* Blur only on wide viewports: backdrop-filter creates a CSS containing
     block, which breaks position:fixed on the mobile nav panel below. */
  @media (min-width: 1025px) {
    .site-header { background: rgba(250, 247, 240, 0.88); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
  }
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-coir-dark);
}
.brand-mark {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--color-white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 0 2px rgba(107,66,38,0.12), var(--shadow-xs);
  padding: 3px;
  object-fit: contain;
  flex-shrink: 0;
}
.brand small { display: block; font-weight: 500; font-size: 0.6rem; letter-spacing: 0.13em; color: var(--color-muted-2); text-transform: uppercase; margin-top: 1px; }

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0; padding: 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 0.94rem;
}
.nav-links a {
  color: var(--color-ink);
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  transition: color var(--transition), background var(--transition);
}
.nav-links a.active { color: var(--color-leaf-dark); background: rgba(63,125,67,0.10); }
.nav-links a:hover { color: var(--color-leaf-dark); background: rgba(63,125,67,0.08); }

.nav-cta { display: flex; align-items: center; gap: 18px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  z-index: 60;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--color-coir-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}
.site-header.open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header.open .nav-toggle span:nth-child(2) { opacity: 0; }
.site-header.open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    linear-gradient(120deg, rgba(31,26,21,0.86), rgba(36,79,40,0.76)),
    url('../images/hero-greenhouse.jpg');
  background-size: cover;
  background-position: center;
  color: var(--color-white);
  overflow: hidden;
}
.hero .container {
  padding-top: clamp(72px, 12vw, 130px);
  padding-bottom: clamp(72px, 12vw, 130px);
  max-width: 780px;
}
.hero h1 { color: var(--color-white); }
.hero p.lead { color: #f3ecdc; font-size: 1.14rem; max-width: 560px; }
.hero-actions { display: flex; gap: 16px; margin-top: var(--space-6); flex-wrap: wrap; }
.hero-badges {
  display: flex; gap: clamp(20px, 4vw, 32px); margin-top: var(--space-8); flex-wrap: wrap;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.18);
}
.hero-badge { font-family: var(--font-head); }
.hero-badge b { display: block; font-size: 1.7rem; color: var(--color-white); }
.hero-badge span { font-size: 0.78rem; color: #dcd0b8; text-transform: uppercase; letter-spacing: 0.08em; }

.page-hero {
  background: linear-gradient(120deg, var(--color-coir-dark), var(--color-leaf-dark));
  color: var(--color-white);
  padding: clamp(56px, 8vw, 80px) 0 clamp(44px, 6vw, 60px);
}
.page-hero h1 { color: var(--color-white); margin-bottom: 0.35em; }
.page-hero p { color: rgba(255,255,255,0.82); font-size: 1.05rem; max-width: 640px; }
.breadcrumb { font-size: 0.85rem; color: #dcd0b8; margin-bottom: var(--space-4); }
.breadcrumb a { color: #dcd0b8; }
.breadcrumb a:hover { color: var(--color-white); }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
  height: 100%;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.card .icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  background: var(--color-sand);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-5);
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  text-align: center;
}
.stat-strip .stat {
  padding: var(--space-5) var(--space-3);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.stat-strip .stat b {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 1.5rem + 1vw, 2.5rem);
  color: var(--color-leaf-dark);
}
.stat-strip .stat span { font-size: 0.82rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.06em; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 64px);
  align-items: center;
}

.media-block {
  border-radius: var(--radius-lg);
  min-height: 340px;
  background: linear-gradient(135deg, var(--color-leaf) 0%, var(--color-coir) 100%);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.media-block::after {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(115deg, rgba(255,255,255,0.06) 0 10px, transparent 10px 22px);
  pointer-events: none;
}
.media-block img,
.media-block iframe {
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
  display: block;
  border: 0;
}

.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-thumb {
  height: 200px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.4rem;
  color: white;
  background: linear-gradient(135deg, var(--color-coir), var(--color-coir-dark));
  overflow: hidden;
}
.product-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 420ms var(--ease);
}
.product-card:hover .product-thumb img { transform: scale(1.06); }
.product-card .body { padding: var(--space-6); }
.product-card h3 { margin-bottom: 0.4em; font-size: 1.1rem; }
.product-card p { font-size: 0.92rem; margin-bottom: 0.6em; }
.product-card .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-leaf-dark);
  background: var(--color-sand);
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); counter-reset: step; }
.step {
  position: relative;
  padding: var(--space-6) var(--space-5) var(--space-5);
  padding-top: 58px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-md);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute; top: var(--space-5); left: var(--space-5);
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--color-white);
  color: var(--color-leaf-dark);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 700;
  box-shadow: var(--shadow-sm);
}
.step h3 { color: var(--color-white); }

.timeline { border-left: 3px solid var(--color-border); padding-left: var(--space-6); display: flex; flex-direction: column; gap: var(--space-6); }
.timeline-item { position: relative; }
.timeline-item::before {
  content: "";
  position: absolute; left: -38px; top: 4px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--color-leaf-dark);
  border: 3px solid var(--color-cream);
  box-shadow: var(--shadow-xs);
}
.timeline-item b { color: var(--color-coir-dark); font-family: var(--font-head); }

.quote-block {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 40px);
  font-size: 1.12rem;
  font-style: italic;
  line-height: 1.6;
  position: relative;
}

.logo-strip {
  display: flex; gap: 40px; align-items: center; flex-wrap: wrap; justify-content: center;
  opacity: 0.75;
}
.logo-strip span {
  font-family: var(--font-head); font-weight: 700; letter-spacing: 0.04em;
  color: var(--color-muted); font-size: 1rem;
}

.map-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.map-list li {
  list-style: none;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-5);
  font-size: 0.92rem;
  font-weight: 500;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--transition), transform var(--transition);
}
.map-list li:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.form-grid .full { grid-column: 1 / -1; }
label { display: block; font-family: var(--font-head); font-size: 0.85rem; font-weight: 600; margin-bottom: 7px; color: var(--color-coir-dark); }
input, select, textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--color-white);
  color: var(--color-ink);
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:hover, select:hover, textarea:hover { border-color: var(--color-muted-2); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--color-leaf); box-shadow: var(--focus-ring); }
textarea { resize: vertical; min-height: 130px; }

.contact-info-card { background: var(--color-white); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-6); box-shadow: var(--shadow-sm); }
.contact-info-card ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-5); }
.contact-info-card li { display: flex; gap: var(--space-4); align-items: flex-start; }
.contact-info-card .icon { flex-shrink: 0; width: 42px; height: 42px; border-radius: var(--radius-sm); background: var(--color-sand); display: flex; align-items: center; justify-content: center; }

.form-note { font-size: 0.82rem; color: var(--color-muted-2); margin-top: var(--space-3); }
.form-success {
  display: none;
  background: #e5f2e6;
  border: 1.5px solid var(--color-leaf);
  color: var(--color-leaf-dark);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  margin-bottom: var(--space-5);
}
.form-success.show { display: block; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-leaf-dark), var(--color-coir-dark));
  color: white;
  border-radius: var(--radius-lg);
  padding: clamp(32px, 5vw, 52px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  box-shadow: var(--shadow-md);
}
.cta-band h2 { color: white; margin-bottom: 0.2em; }
.cta-band p { color: #f2e8d8; margin: 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-coir-dark); color: #ddc9ac; padding: var(--space-8) 0 var(--space-5); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: var(--space-7); }
.footer-grid h4 { color: white; font-size: 1rem; margin-bottom: 1em; }
.footer-grid p { color: #c2ac8b; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-3); }
.footer-grid a { color: #c2ac8b; font-size: 0.92rem; }
.footer-grid a:hover { color: white; }
.footer-bottom {
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255,255,255,0.12);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3);
  font-size: 0.82rem; color: #a8926f;
}
.footer-social { display: flex; gap: var(--space-3); }
.footer-social a {
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 0.85rem;
  transition: background var(--transition), transform var(--transition);
}
.footer-social a:hover { background: var(--color-leaf); transform: translateY(-2px); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .map-list { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
}

@media (min-width: 1025px) {
  .nav-toggle { display: none; }
}

@media (max-width: 1024px) {
  .nav-toggle { display: flex; }
  .nav-cta .btn { display: none; }

  .site-header.open::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(20, 16, 12, 0.45);
    backdrop-filter: blur(2px);
    z-index: 55;
    animation: fadeIn var(--transition) both;
  }
  .site-header.open .nav-links {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; right: 0;
    bottom: 0;
    width: min(320px, 84vw);
    background: var(--color-cream);
    padding: 100px var(--space-6) var(--space-6);
    box-shadow: var(--shadow-lg);
    gap: 4px;
    z-index: 58;
    overflow-y: auto;
    animation: slideIn var(--transition) both;
  }
  .site-header.open .nav-links a { padding: 14px 16px; font-size: 1.02rem; border-radius: var(--radius-sm); }
  .site-header.open .nav-toggle {
    position: fixed; top: 20px; right: 20px; z-index: 60;
    background: var(--color-coir-dark);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
  }
  .site-header.open .nav-toggle span { background: var(--color-white); }
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }

@media (max-width: 760px) {
  .topbar-contacts { gap: 12px; }
  .topbar-contacts span:nth-child(3) { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; }
  .map-list { grid-template-columns: 1fr; }
  .hero-badges { gap: var(--space-5); }
  .site-header.open .nav-cta { display: none; }
}