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

:root {
  --primary: #0f3b66;
  --primary-dark: #0a2b4a;
  --accent: #f28c28;
  --accent-dark: #d97312;
  --text: #1f2937;
  --muted: #667085;
  --bg: #ffffff;
  --soft: #f5f7fb;
  --soft-2: #eef3f8;
  --border: #e5e7eb;
  --white: #ffffff;
  --dark: #0b1220;
  --success: #25d366;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 10px 30px rgba(15, 59, 102, 0.08);
  --shadow-lg: 0 20px 45px rgba(15, 59, 102, 0.12);
  --container: 1180px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

button,
input,
textarea,
select {
  font: inherit;
}

ul {
  list-style: none;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.header-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo a {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.main-nav a {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle {
  display: none;
  border: none;
  background: transparent;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  color: var(--primary);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 12px;
  padding: 0 16px 16px;
  border-top: 1px solid var(--border);
  background: var(--white);
}

.mobile-nav a {
  padding: 12px 0;
  border-bottom: 1px solid #f1f3f5;
  color: var(--text);
  font-weight: 500;
}

.mobile-nav.show {
  display: flex;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

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

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

.btn-secondary {
  background: var(--white);
  color: var(--primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
}

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

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

.btn-whatsapp {
  background: var(--success);
  color: var(--white);
}

.btn-full {
  width: 100%;
}

/* ========== Hero / Banner ========== */
.hero {
  padding: 80px 0;
  background:
    linear-gradient(135deg, rgba(15, 59, 102, 0.08), rgba(242, 140, 40, 0.08)),
    var(--soft);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.eyebrow,
.section-tag,
.light-tag {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 13px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow,
.section-tag {
  color: var(--primary);
}

.light-tag {
  color: var(--white);
}

.hero h1,
.page-hero h1 {
  font-size: 48px;
  line-height: 1.15;
  color: var(--primary-dark);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.hero p,
.page-hero p {
  font-size: 18px;
  color: var(--muted);
  max-width: 760px;
}

.hero-actions,
.page-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 28px 0;
}

.hero-points {
  display: grid;
  gap: 10px;
}

.hero-points li {
  position: relative;
  padding-left: 20px;
  color: var(--text);
}

.hero-points li::before {
  content: "•";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-size: 20px;
}

.hero-card,
.page-side-card,
.contact-card {
  background: var(--white);
  border: 1px solid rgba(15, 59, 102, 0.08);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.hero-card h3,
.page-side-card h3,
.contact-card h3 {
  color: var(--primary);
  font-size: 28px;
  margin-bottom: 12px;
}

.hero-card p,
.page-side-card p,
.contact-card p {
  color: var(--muted);
  font-size: 16px;
}

.hero-badge,
.info-badge {
  display: inline-block;
  margin-bottom: 14px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(242, 140, 40, 0.12);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.hero-mini-grid,
.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.mini-box {
  background: var(--soft);
  border-radius: 14px;
  padding: 16px;
  text-align: center;
  font-weight: 700;
  color: var(--primary);
}

/* ========== Common Sections ========== */
.section {
  padding: 80px 0;
}

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

.section-head {
  max-width: 780px;
  margin-bottom: 36px;
}

.section-head h2 {
  font-size: 36px;
  line-height: 1.2;
  color: var(--primary-dark);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-head p {
  color: var(--muted);
  font-size: 17px;
}

/* ========== Grid / Cards ========== */
.card-grid {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-6 {
  grid-template-columns: repeat(3, 1fr);
}

.info-card,
.app-card,
.feature-card,
.stat-box,
.faq-item,
.product-card,
.material-card,
.value-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.info-card,
.app-card,
.feature-card,
.value-card,
.material-card {
  padding: 24px;
}

.info-card h3,
.app-card h3,
.feature-card h3,
.value-card h3,
.material-card h3,
.product-card h3 {
  color: var(--primary);
  margin-bottom: 10px;
  font-size: 22px;
}

.info-card p,
.app-card p,
.feature-card p,
.value-card p,
.material-card p,
.product-card p {
  color: var(--muted);
}

.info-card a,
.product-card a,
.text-link {
  color: var(--accent);
  font-weight: 700;
}

.product-card {
  overflow: hidden;
}

.product-thumb {
  height: 220px;
  background: linear-gradient(135deg, #e8eef6, #d9e7f2);
  border-bottom: 1px solid var(--border);
}

.product-body {
  padding: 22px;
}

.product-meta {
  display: grid;
  gap: 8px;
  margin: 14px 0 18px;
  color: var(--muted);
  font-size: 14px;
}

.product-meta span {
  display: block;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-box {
  padding: 28px 20px;
  text-align: center;
}

.stat-box strong {
  display: block;
  font-size: 32px;
  color: var(--primary);
  margin-bottom: 8px;
}

.stat-box span {
  color: var(--muted);
  font-size: 15px;
}

/* ========== Split Layout ========== */
.split-grid,
.two-col-layout,
.page-hero-grid,
.about-grid,
.product-detail-grid,
.application-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.narrow-side {
  grid-template-columns: 1.2fr 0.8fr;
}

.wide-side {
  grid-template-columns: 0.9fr 1.1fr;
}

/* ========== Product Detail ========== */
.product-gallery {
  display: grid;
  gap: 16px;
}

.product-main-image {
  height: 420px;
  border-radius: 24px;
  background: linear-gradient(135deg, #e7eef7, #d7e6f3);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.product-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.product-thumb-item {
  height: 90px;
  border-radius: 14px;
  background: linear-gradient(135deg, #eef4f9, #dbe8f3);
  border: 1px solid var(--border);
}

.product-summary {
  display: grid;
  gap: 18px;
}

.product-summary h1 {
  font-size: 40px;
  line-height: 1.18;
  color: var(--primary-dark);
}

.product-summary p {
  color: var(--muted);
  font-size: 17px;
}

.product-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.spec-table tr:not(:last-child) {
  border-bottom: 1px solid var(--border);
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 16px 18px;
  vertical-align: top;
}

.spec-table th {
  width: 34%;
  color: var(--primary);
  background: #fafbfd;
}

/* ========== Lists ========== */
.check-list,
.bullet-list,
.icon-list {
  display: grid;
  gap: 10px;
}

.check-list li,
.bullet-list li,
.icon-list li {
  position: relative;
  padding-left: 22px;
  color: var(--text);
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 700;
}

.bullet-list li::before,
.icon-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-size: 20px;
}

/* ========== FAQ ========== */
.faq-list {
  display: grid;
  gap: 16px;
}

.faq-item {
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: var(--white);
  border: none;
  padding: 22px 24px;
  text-align: left;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  color: var(--primary-dark);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  border-top: 1px solid transparent;
}

.faq-answer p,
.faq-answer div {
  padding: 0 24px 22px;
  color: var(--muted);
}

.faq-item.active .faq-answer {
  max-height: 320px;
  border-top-color: var(--border);
}

/* ========== Forms ========== */
.contact-cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
}

.contact-cta-wrap {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 30px;
  align-items: start;
}

.contact-cta h2 {
  font-size: 38px;
  line-height: 1.2;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.contact-cta p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 640px;
}

.contact-form {
  background: var(--white);
  padding: 24px;
  border-radius: 20px;
  display: grid;
  gap: 14px;
  box-shadow: var(--shadow-lg);
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 15px;
  outline: none;
  background: var(--white);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  border-color: var(--primary);
}

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

/* ========== CTA Blocks ========== */
.cta-box,
.highlight-box,
.note-box {
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
}

.cta-box h3,
.highlight-box h3,
.note-box h3 {
  color: var(--primary);
  margin-bottom: 10px;
}

.cta-box p,
.highlight-box p,
.note-box p {
  color: var(--muted);
  margin-bottom: 14px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--dark);
  color: #cbd5e1;
  padding: 48px 0;
}

.footer-wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 30px;
}

.site-footer h3,
.site-footer h4 {
  color: var(--white);
  margin-bottom: 12px;
}

.site-footer ul {
  display: grid;
  gap: 8px;
}

.site-footer a:hover {
  color: var(--white);
}

/* ========== WhatsApp Float ========== */
.whatsapp-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 999;
  background: var(--success);
  color: var(--white);
  border-radius: 999px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  font-weight: 700;
}

.whatsapp-float:hover {
  transform: translateY(-2px);
}

.wa-icon {
  font-size: 18px;
  line-height: 1;
}

.wa-text {
  font-size: 14px;
}

/* ========== Helpers ========== */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--muted);
}

.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-40 { margin-top: 40px; }

.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero-grid,
  .page-hero-grid,
  .split-grid,
  .two-col-layout,
  .about-grid,
  .product-detail-grid,
  .application-grid,
  .contact-cta-wrap {
    grid-template-columns: 1fr;
  }

  .grid-6,
  .grid-4,
  .grid-3,
  .stats-grid,
  .footer-wrap {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero h1,
  .page-hero h1 {
    font-size: 40px;
  }

  .contact-cta h2 {
    font-size: 34px;
  }
}

@media (max-width: 768px) {
  .main-nav,
  .header-actions .btn:not(.btn-whatsapp) {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .grid-6,
  .grid-4,
  .grid-3,
  .grid-2,
  .stats-grid,
  .footer-wrap,
  .product-thumbs,
  .hero-mini-grid,
  .mini-grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .section,
  .contact-cta {
    padding: 56px 0;
  }

  .hero h1,
  .page-hero h1,
  .product-summary h1 {
    font-size: 32px;
  }

  .section-head h2,
  .contact-cta h2 {
    font-size: 28px;
  }

  .hero p,
  .page-hero p {
    font-size: 16px;
  }

  .header-wrap {
    min-height: 70px;
  }

  .whatsapp-float {
    right: 14px;
    bottom: 14px;
    padding: 12px 16px;
  }

  .wa-text {
    display: none;
  }

  .product-main-image {
    height: 280px;
  }
}