/* BTM Residual — Design System */
:root {
  --bg: #f4f7f9;
  --surface: #ffffff;
  --ink: #0f1c24;
  --muted: #5b6b76;
  --line: #e2e9ee;
  --brand: #0b6e6e;
  --brand-dark: #084f4f;
  --brand-soft: #e6f4f4;
  --accent: #c45c26;
  --accent-soft: #fdf0e9;
  --ok: #1a7f4b;
  --ok-soft: #e8f7ef;
  --warn: #b7791f;
  --warn-soft: #fef6e7;
  --danger: #c53030;
  --danger-soft: #fde8e8;
  --info: #2b6cb0;
  --shadow: 0 10px 30px rgba(15, 28, 36, 0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --max: 1180px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }
.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

/* Top bar */
.topbar {
  background: var(--brand-dark);
  color: #d7ecec;
  font-size: 0.85rem;
  padding: 0.45rem 0;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.topbar a:hover { color: #fff; }

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.logo-img {
  height: 56px;
  width: auto;
  display: block;
}
.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand), #149494);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 800;
}
.logo span { color: var(--brand); font-weight: 600; font-size: 0.85rem; display: block; }
.footer-logo {
  height: 72px;
  width: auto;
  display: block;
  margin-bottom: 0.75rem;
  background: #fff;
  border-radius: 14px;
  padding: 4px;
}
.nav-links {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  flex-wrap: wrap;
}
.nav-links a {
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.92rem;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--brand-soft);
  color: var(--brand-dark);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 0;
  border-radius: 999px;
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.15s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-accent { background: #25d366; color: #062b14; }
.btn-accent:hover { filter: brightness(0.95); }
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--line);
  color: var(--ink);
}
.btn-outline:hover { border-color: var(--brand); color: var(--brand); }
.btn-ghost { background: var(--brand-soft); color: var(--brand-dark); }
.btn-sm { padding: 0.45rem 0.85rem; font-size: 0.88rem; }
.btn-danger { background: var(--danger-soft); color: var(--danger); }
.btn-block { width: 100%; }

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 4rem 0 3.5rem;
  background:
    radial-gradient(circle at 85% 15%, rgba(11,110,110,0.18), transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(196,92,38,0.12), transparent 35%),
    linear-gradient(180deg, #fff, var(--bg));
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--brand-soft);
  color: var(--brand-dark);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--brand);
}
.hero p.lead {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 48ch;
  margin-bottom: 1.5rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1.75rem; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.9rem;
  box-shadow: var(--shadow);
}
.stat-card strong { display: block; font-size: 1.2rem; color: var(--brand-dark); }
.stat-card span { color: var(--muted); font-size: 0.82rem; }

.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}
.pillars {
  display: grid;
  gap: 0.85rem;
}
.pillar {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  display: grid;
  gap: 0.35rem;
  transition: 0.15s ease;
}
.pillar:hover { border-color: var(--brand); transform: translateY(-2px); }
.pillar .tag {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--brand);
}
.pillar.sell .tag { color: var(--accent); }
.pillar h3 { font-size: 1.05rem; }
.pillar p { color: var(--muted); font-size: 0.92rem; }

/* Sections */
section { padding: 3.5rem 0; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.section-head h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  letter-spacing: -0.02em;
}
.section-head p { color: var(--muted); max-width: 50ch; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: 0 4px 16px rgba(15,28,36,0.04);
}
.card h3 { margin-bottom: 0.4rem; }
.card p { color: var(--muted); font-size: 0.95rem; }
.icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-weight: 800;
  margin-bottom: 0.85rem;
}

.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  counter-reset: step;
}
.process-step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.15rem 1.35rem;
  position: relative;
  box-shadow: 0 4px 16px rgba(15,28,36,0.04);
}
.process-step .num {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 0.55rem;
}
.process-step h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.process-step p { color: var(--muted); font-size: 0.92rem; }

.norm-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}
.norm-strip span {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
}

.audience {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

/* Products */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}
.chip {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--muted);
  cursor: pointer;
}
.chip.active, .chip:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}
.search-bar {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}
.search-bar input {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  background: #fff;
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}
.product-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: 0.15s ease;
}
.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: #c5dbdb;
}
.product-visual {
  height: 150px;
  display: grid;
  place-items: center;
  font-weight: 800;
  color: var(--brand-dark);
  background:
    linear-gradient(145deg, #dff1f1, #f7fbfb 55%, #fdeee4);
  position: relative;
}
.product-visual .badge {
  position: absolute;
  top: 0.7rem;
  left: 0.7rem;
  background: #fff;
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--brand-dark);
  border: 1px solid var(--line);
}
.product-visual .stock-badge {
  left: auto;
  right: 0.7rem;
}
.stock-badge.ok { color: var(--ok); }
.stock-badge.low { color: var(--warn); }
.stock-badge.out { color: var(--danger); }
.product-body { padding: 1rem; display: grid; gap: 0.45rem; flex: 1; }
.product-body .cat {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.product-body h3 { font-size: 1.02rem; line-height: 1.3; }
.price {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--brand-dark);
}
body:not(.admin) .price {
  display: none !important;
}
.product-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

/* Product detail */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.detail-visual {
  min-height: 320px;
  border-radius: var(--radius);
  background: linear-gradient(145deg, #dff1f1, #f7fbfb 55%, #fdeee4);
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--brand-dark);
}
.detail-panel { display: grid; gap: 0.85rem; align-content: start; }
.meta-list {
  display: grid;
  gap: 0.45rem;
  margin: 0.5rem 0;
}
.meta-list div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.meta-list span { color: var(--muted); }
.qty-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.qty-row input {
  width: 80px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem;
  text-align: center;
}

/* Forms */
.form-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  max-width: 760px;
  margin: 0 auto;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}
.form-grid .full { grid-column: 1 / -1; }
label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink);
}
input, select, textarea {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem 0.85rem;
  background: #fff;
  color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(11,110,110,0.25);
  border-color: var(--brand);
}
.help { color: var(--muted); font-weight: 500; font-size: 0.82rem; }
.alert {
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin-bottom: 1rem;
  font-weight: 600;
}
.alert-ok { background: var(--ok-soft); color: var(--ok); }
.alert-warn { background: var(--warn-soft); color: var(--warn); }
.alert-info { background: #e8f1fb; color: var(--info); }

/* CTA */
.cta-band {
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  color: #fff;
  border-radius: calc(var(--radius) + 6px);
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.cta-band p { opacity: 0.9; max-width: 50ch; }

/* Footer */
.site-footer {
  margin-top: 2rem;
  background: #0b171d;
  color: #c7d3da;
  padding: 2.5rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.site-footer h4 { color: #fff; margin-bottom: 0.7rem; }
.site-footer a { color: #c7d3da; }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; display: grid; gap: 0.4rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 1rem;
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.powered-by {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.72;
  color: inherit;
  text-decoration: none;
}
.powered-by:hover { opacity: 1; }
.powered-by img {
  height: 14px;
  width: auto;
  display: block;
}
.site-footer .powered-by { color: #c7d3da; }
.powered-by.on-light { color: #5b6b76; }

/* SEO content block */
.seo-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.seo-block h2 { margin-bottom: 0.75rem; }
.seo-block p, .seo-block li { color: var(--muted); }
.seo-block ul { margin: 0.75rem 0 0 1.1rem; display: grid; gap: 0.35rem; }

/* Breadcrumb */
.breadcrumb {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 1rem;
}
.breadcrumb a { color: var(--brand); font-weight: 600; }

/* Page head */
.page-head {
  padding: 2rem 0 1rem;
}
.page-head h1 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}
.page-head p { color: var(--muted); max-width: 60ch; }

/* Empty */
.empty {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: #fff;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid, .detail-grid, .footer-grid, .grid-3, .grid-4, .process, .audience { grid-template-columns: 1fr; }
  .nav { flex-wrap: wrap; }
  .nav-links {
    display: flex;
    order: 3;
    width: 100%;
    justify-content: flex-start;
  }
  .logo-img { height: 46px; }
  .hero-stats { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .product-actions { grid-template-columns: 1fr; }
}