/* ============================================
   BinchotanVN — Warm/premium food aesthetic
   Color scheme: charcoal black + warm cream + amber accent
   ============================================ */

:root {
  --color-bg: #faf7f2;
  --color-bg-alt: #f1ece3;
  --color-dark: #1a1816;
  --color-text: #2c2925;
  --color-muted: #6b665e;
  --color-border: #e5ddd0;
  --color-accent: #c4661f;       /* warm amber — like charcoal glow */
  --color-accent-dark: #8f4613;
  --color-rfq-bg: #1a1816;

  --font-display: "Playfair Display", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

  --max: 1200px;
  --max-narrow: 780px;
  --radius: 8px;
  --radius-lg: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
.container-narrow { max-width: var(--max-narrow); margin: 0 auto; padding: 0 1.5rem; }

/* ============ BUTTONS ============ */
.btn-primary, .btn-secondary {
  display: inline-block;
  padding: 14px 28px;
  font-weight: 500;
  font-size: 15px;
  border-radius: var(--radius);
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn-primary {
  background: var(--color-accent);
  color: white;
}
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-1px); }
.btn-secondary {
  background: transparent;
  color: var(--color-dark);
  border: 1.5px solid var(--color-dark);
}
.btn-secondary:hover { background: var(--color-dark); color: white; }
.btn-sm { padding: 9px 18px; font-size: 13px; }
.btn-lg { padding: 16px 32px; font-size: 16px; }

/* ============ NAV ============ */
.nav {
  position: sticky;
  top: 0;
  background: rgba(250, 247, 242, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}
.logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: -0.5px;
}
.logo span { color: var(--color-accent); }
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  font-size: 14px;
  font-weight: 500;
}
.nav-links a {
  color: var(--color-muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--color-dark); }

/* ============ HERO ============ */
.hero {
  padding: 80px 0 100px;
  border-bottom: 1px solid var(--color-border);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
}
.badge-row { margin-bottom: 24px; }
.badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.3px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 24px;
  color: var(--color-dark);
}
.accent { color: var(--color-accent); font-style: italic; }
.hero-sub {
  font-size: 18px;
  color: var(--color-muted);
  margin-bottom: 36px;
  max-width: 540px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}
.hero-trust {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding-top: 36px;
  border-top: 1px solid var(--color-border);
}
.hero-trust div {
  display: flex;
  flex-direction: column;
}
.hero-trust strong {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-dark);
}
.hero-trust span {
  font-size: 12px;
  color: var(--color-muted);
  line-height: 1.3;
}
.hero-visual {
  position: relative;
}
.hero-img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: var(--radius-lg);
  display: block;
}
.hero-img-placeholder {
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, #2c2520, #1a1816);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #5a5148;
  font-size: 14px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero-img-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 70%, rgba(196, 102, 31, 0.15), transparent 60%);
}

/* ============ SECTION ============ */
.section {
  padding: 100px 0;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-accent);
  margin-bottom: 16px;
}
.eyebrow.white { color: #e89f5c; }
.section h2 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  color: var(--color-dark);
  margin-bottom: 16px;
}
h2.white { color: white; }
.section-sub {
  font-size: 17px;
  color: var(--color-muted);
}
.section-sub.white { color: #a8a199; }

/* ============ STEPS ============ */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.step {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: border-color 0.2s;
}
.step:hover { border-color: var(--color-accent); }
.step-num {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 16px;
  line-height: 1;
}
.step h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-dark);
}
.step p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ============ PRODUCTS ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.2s, border-color 0.2s;
}
.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}
.product-img {
  aspect-ratio: 3/2;
  width: 100%;
  object-fit: cover;
  display: block;
}
div.product-img {
  background: linear-gradient(135deg, #e5ddd0, #c9bba4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #8a7d65;
  font-size: 12px;
}
.product-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  padding: 20px 20px 12px;
  color: var(--color-dark);
}
.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 20px 12px;
}
.product-specs span {
  font-size: 11px;
  padding: 4px 10px;
  background: var(--color-bg-alt);
  color: var(--color-muted);
  border-radius: 100px;
  font-weight: 500;
}
.product-card p {
  padding: 0 20px 22px;
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ============ WHY ============ */
.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 60px;
}
.why-item {
  border-left: 3px solid var(--color-accent);
  padding-left: 24px;
}
.why-item h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-dark);
}
.why-item p {
  color: var(--color-muted);
  font-size: 15px;
}

/* ============ INDUSTRIES ============ */
.industries {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.industry {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}
.industry strong {
  display: block;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-dark);
}
.industry span {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

/* ============ FAQ ============ */
.faq {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq details {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq details[open] { border-color: var(--color-accent); }
.faq summary {
  padding: 20px 24px;
  font-weight: 500;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 56px;
  color: var(--color-dark);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 300;
  color: var(--color-accent);
  transition: transform 0.2s;
}
.faq details[open] summary::after { content: "−"; }
.faq details p {
  padding: 0 24px 20px;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.7;
}

/* ============ RFQ ============ */
.section-rfq {
  background: var(--color-rfq-bg);
  color: white;
  padding: 100px 0;
}
.rfq-form {
  background: #23201d;
  border: 1px solid #332e2a;
  padding: 40px;
  border-radius: var(--radius-lg);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
}
.form-group label {
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 8px;
  color: #d4cec4;
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  background: #1a1816;
  border: 1px solid #3a342e;
  border-radius: var(--radius);
  color: white;
  font-family: inherit;
  font-size: 15px;
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}
.form-group textarea { resize: vertical; }
.form-submit {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.form-note {
  font-size: 13px;
  color: #8a8278;
}

/* ============ FOOTER ============ */
.footer {
  background: var(--color-bg-alt);
  padding: 64px 0 0;
  border-top: 1px solid var(--color-border);
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p {
  font-size: 14px;
  color: var(--color-muted);
  max-width: 400px;
  line-height: 1.6;
}
.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 14px;
  color: var(--color-dark);
}
.footer-col p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
}
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  font-size: 13px;
  color: var(--color-muted);
}

/* ============ WHATSAPP FLOAT ============ */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  z-index: 99;
  transition: transform 0.2s;
}
.whatsapp-float:hover { transform: scale(1.1); }

/* ============ RESPONSIVE ============ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; max-width: 400px; }
  .hero-trust { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .steps, .product-grid, .industries { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .nav-links { display: none; }
  .section { padding: 64px 0; }
  .hero { padding: 48px 0 64px; }
}
@media (max-width: 560px) {
  .steps, .product-grid, .industries { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 16px; }
  .rfq-form { padding: 24px; }
  .hero-trust { grid-template-columns: repeat(2, 1fr); }
}