/* ============================================================
   FANO Nutrition — Feed Grade Phosphate
   Clean, professional, responsive. No frameworks.
   ============================================================ */

:root {
  --teal: #1d9bd8;
  --teal-dark: #127cb4;
  --teal-deep: #0d5b8c;
  --green: #3fae49;
  --accent: #ffd200;
  --ink: #17313a;
  --muted: #5a6d74;
  --bg: #ffffff;
  --bg-soft: #f3f8f7;
  --line: #e2ecea;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(10, 60, 52, 0.08);
  --shadow-hover: 0 12px 32px rgba(10, 60, 52, 0.14);
  --container: 1160px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

img { max-width: 100%; display: block; }
a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--teal-dark); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--ink); }
h2 { font-size: 2rem; }
h3 { font-size: 1.15rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  border: 2px solid transparent;
  cursor: pointer;
  text-align: center;
}
.btn-primary { background: var(--teal); color: #fff; }
.btn-primary:hover { background: var(--teal-dark); color: #fff; transform: translateY(-1px); }
.btn-ghost { border-color: rgba(255,255,255,0.7); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,0.12); color: #fff; }
.btn-light { background: #fff; color: var(--teal-dark); }
.btn-light:hover { background: var(--accent); color: var(--ink); transform: translateY(-1px); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }

/* ---------- Top bar ---------- */
.topbar {
  background: var(--teal-deep);
  color: #cfe6e1;
  font-size: 0.82rem;
}
.topbar-inner {
  display: flex;
  justify-content: flex-end;
  gap: 28px;
  padding: 7px 20px;
  flex-wrap: wrap;
}
.topbar-item a { color: #fff; font-weight: 600; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 20px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { height: 48px; width: auto; }
.brand-mark { flex-shrink: 0; }
.brand-text {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 1px;
  color: var(--teal-deep);
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand-text small {
  font-size: 0.6rem;
  letter-spacing: 4px;
  color: var(--teal);
  font-weight: 600;
}
.brand-text.light { color: #fff; }
.brand-text.light small { color: var(--green); }

.nav { display: flex; align-items: center; gap: 28px; }
.nav > a { font-weight: 600; color: var(--ink); font-size: 0.95rem; position: relative; padding: 6px 0; }
.nav > a:hover, .nav > a.active { color: var(--teal); }
.nav > a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--teal);
  border-radius: 2px;
}
.nav-cta { margin-left: 8px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  width: 24px; height: 2.5px;
  background: var(--teal-deep);
  border-radius: 2px;
  transition: all 0.25s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  padding: 110px 0 130px;
  overflow: hidden;
}
.hero-media {
  position: absolute;
  inset: 0;
  background: url("../img/hero-home.jpg") center 40% / cover no-repeat;
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(10, 68, 105, 0.88) 0%, rgba(10, 68, 105, 0.62) 55%, rgba(10, 68, 105, 0.35) 100%);
}
.hero-inner { position: relative; z-index: 1; max-width: 720px; }
.hero-eyebrow {
  display: inline-block;
  background: rgba(242, 201, 76, 0.18);
  border: 1px solid rgba(242, 201, 76, 0.5);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 { color: #fff; font-size: 2.9rem; letter-spacing: -0.5px; }
.hero-sub { margin: 20px 0 32px; font-size: 1.1rem; color: #e8f3f0; max-width: 620px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Stats ---------- */
.stats { background: var(--teal-deep); padding: 34px 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-num { display: block; font-size: 1.9rem; font-weight: 800; color: var(--accent); }
.stat-label { font-size: 0.85rem; color: #b8d5cf; letter-spacing: 1px; text-transform: uppercase; }

/* ---------- Sections ---------- */
.section { padding: 84px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.section-head p { color: var(--muted); margin-top: 12px; }
.section-head h2::after {
  content: "";
  display: block;
  width: 56px; height: 3px;
  background: var(--teal);
  margin: 16px auto 0;
  border-radius: 2px;
}

/* ---------- Product cards ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.product-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
  color: var(--ink);
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--teal);
  color: var(--ink);
}
.product-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  background: #fff;
  border-radius: 8px;
  margin-bottom: 18px;
}
.product-tag {
  position: absolute;
  top: 14px; right: 14px;
  background: var(--teal);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
}
.product-card h3 { margin-bottom: 8px; }
.product-card p { color: var(--muted); font-size: 0.92rem; flex: 1; }
.link-more { color: var(--teal); font-weight: 600; font-size: 0.9rem; margin-top: 14px; }
.product-card-cta {
  background: var(--teal-deep);
  border-color: var(--teal-deep);
  color: #fff;
  align-items: flex-start;
  justify-content: center;
  gap: 10px;
}
.product-card-cta h3 { color: #fff; }
.product-card-cta p { color: #b8d5cf; }

/* ---------- Features ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.feature {
  background: #fff;
  border-radius: var(--radius);
  padding: 30px 24px;
  box-shadow: var(--shadow);
}
.feature-icon {
  width: 54px; height: 54px;
  border-radius: 12px;
  background: rgba(14, 138, 120, 0.1);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature h3 { font-size: 1.05rem; margin-bottom: 10px; }
.feature p { color: var(--muted); font-size: 0.92rem; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--teal); color: #fff; padding: 60px 0; }
.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.cta-band h2 { color: #fff; font-size: 1.7rem; }
.cta-band p { color: #d7ede9; margin-top: 8px; max-width: 560px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--teal-deep); color: #b8d5cf; padding: 60px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 0.8fr 1.1fr;
  gap: 40px;
  padding-bottom: 44px;
}
.footer-col h4 { color: #fff; margin-bottom: 16px; font-size: 0.95rem; letter-spacing: 1px; }
.footer-col a { display: block; color: #b8d5cf; padding: 4px 0; font-size: 0.92rem; }
.footer-col a:hover { color: var(--accent); }
.footer-col p { font-size: 0.92rem; margin-top: 6px; }
.footer-brand p { margin-top: 14px; max-width: 280px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 18px 20px;
  font-size: 0.82rem;
  text-align: center;
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  background: linear-gradient(100deg, var(--teal-deep) 0%, var(--teal) 100%);
  color: #fff;
  padding: 64px 0;
}
.page-hero h1 { color: #fff; font-size: 2.3rem; }
.page-hero p { color: #d7ede9; margin-top: 12px; max-width: 640px; }
.breadcrumb { font-size: 0.85rem; color: #a9cdc6; margin-bottom: 14px; }
.breadcrumb a { color: #d7ede9; }
.breadcrumb span { margin: 0 6px; }

/* ---------- About page ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 50px;
  align-items: center;
}
.about-grid img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; }
.about-text p { margin-bottom: 16px; color: var(--ink); }
.about-text .lead { font-size: 1.08rem; color: var(--ink); font-weight: 500; }
.about-quote {
  border-left: 4px solid var(--accent);
  background: var(--bg-soft);
  padding: 18px 22px;
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--teal-deep);
  margin: 22px 0;
}
.timeline { margin-top: 10px; }
.timeline li { list-style: none; padding-left: 26px; position: relative; margin-bottom: 14px; color: var(--muted); }
.timeline li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--teal);
}
.timeline li strong { color: var(--ink); }

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 20px;
}
.value-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
}
.value-card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.value-card p { color: var(--muted); font-size: 0.92rem; }

/* ---------- Products page ---------- */
.products-intro { max-width: 760px; margin: 0 auto 50px; text-align: center; color: var(--muted); }

/* ---------- Product detail ---------- */
.detail-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 50px;
  align-items: start;
}
.detail-img-wrap {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 96px;
}
.detail-img-wrap img { width: 100%; }
.detail-info h1 { font-size: 1.9rem; margin-bottom: 6px; }
.detail-info .detail-sub { color: var(--muted); margin-bottom: 24px; font-size: 1.02rem; }
.quick-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 26px 0;
}
.quick-fact {
  background: var(--bg-soft);
  border-radius: 8px;
  padding: 12px 16px;
}
.quick-fact span { display: block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.quick-fact strong { color: var(--ink); font-size: 0.95rem; }

.detail-section { margin-top: 54px; }
.detail-section h2 { font-size: 1.45rem; margin-bottom: 20px; }
.detail-section p { color: var(--ink); margin-bottom: 14px; max-width: 820px; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
table.spec {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 0.95rem;
  min-width: 560px;
}
table.spec th, table.spec td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--line); }
table.spec thead th {
  background: var(--teal);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.5px;
}
table.spec tbody tr:last-child td { border-bottom: 0; }
table.spec tbody tr:nth-child(even) { background: var(--bg-soft); }
table.spec td:nth-child(3) { color: var(--teal-dark); font-weight: 600; }

.conclusion-note {
  display: inline-block;
  background: rgba(14, 138, 120, 0.08);
  border: 1px solid rgba(14, 138, 120, 0.25);
  color: var(--teal-dark);
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.92rem;
  margin-top: 18px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 46px;
  align-items: start;
}
.contact-cards { display: grid; gap: 18px; }
.contact-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.contact-card .feature-icon { margin-bottom: 0; flex-shrink: 0; }
.contact-card h3 { font-size: 1rem; margin-bottom: 4px; }
.contact-card p, .contact-card a { font-size: 0.95rem; color: var(--muted); display: block; }
.contact-card a { color: var(--teal); font-weight: 600; }

.contact-form {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow);
}
.contact-form h2 { font-size: 1.4rem; margin-bottom: 6px; }
.contact-form > p { color: var(--muted); font-size: 0.92rem; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  color: var(--ink);
  background: var(--bg-soft);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--teal);
  background: #fff;
}
.form-note { font-size: 0.82rem; color: var(--muted); margin-top: 12px; }

/* ---------- Photo gallery ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.gallery-grid.cols-2 { grid-template-columns: repeat(2, 1fr); max-width: 760px; }
.gallery-grid figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #fff;
}
.gallery-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}
.gallery-grid figure:hover img { transform: scale(1.04); }
.gallery-grid figcaption {
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid, .contact-grid, .detail-layout { grid-template-columns: 1fr; gap: 36px; }
  .detail-img-wrap { position: static; max-width: 460px; margin: 0 auto; }
  .value-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2.3rem; }
}

@media (max-width: 680px) {
  .brand-logo { height: 40px; }
  .topbar { font-size: 0.78rem; }
  .topbar-inner { justify-content: center; gap: 12px; }

  .nav {
    position: fixed;
    top: 0; right: -290px;
    width: 280px;
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 90px 30px 30px;
    gap: 10px;
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.12);
    transition: right 0.3s ease;
  }
  .nav.open { right: 0; }
  .nav > a { width: 100%; padding: 12px 0; font-size: 1.05rem; border-bottom: 1px solid var(--line); }
  .nav > a.active::after { display: none; }
  .nav-cta { margin: 14px 0 0; width: 100%; }
  .nav-toggle { display: flex; z-index: 110; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

  .hero { padding: 80px 0 96px; }
  .hero h1 { font-size: 1.9rem; }
  .hero-sub { font-size: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .stat-num { font-size: 1.5rem; }
  .product-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .section { padding: 60px 0; }
  .page-hero { padding: 48px 0; }
  .page-hero h1 { font-size: 1.8rem; }
  .quick-facts { grid-template-columns: 1fr 1fr; }
  .gallery-grid, .gallery-grid.cols-2 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .cta-band-inner { flex-direction: column; text-align: center; }
}