/* ===========================
   Victor Polytubes - Styles
   =========================== */

:root {
  --color-primary: #0b3d78;
  --color-primary-dark: #072a54;
  --color-primary-light: #1a5aa8;
  --color-accent: #f5a623;
  --color-accent-dark: #d98c0f;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f7fb;
  --color-bg-dark: #0b1f38;
  --color-text: #1f2937;
  --color-text-light: #5b6b82;
  --color-text-invert: #f4f7fb;
  --color-border: #e2e8f0;
  --radius: 10px;
  --radius-lg: 18px;
  --shadow-sm: 0 2px 8px rgba(11, 61, 120, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 61, 120, 0.12);
  --shadow-lg: 0 20px 48px rgba(11, 61, 120, 0.18);
  --container-width: 1180px;
  --transition: 0.25s ease;
  --font-heading: 'Poppins', 'Segoe UI', Arial, sans-serif;
  --font-body: 'Inter', 'Segoe UI', Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 88px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  background: rgba(245, 166, 35, 0.12);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  color: var(--color-primary-dark);
  margin-bottom: 14px;
  font-weight: 700;
}

.section-header p {
  color: var(--color-text-light);
  font-size: 1.05rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border-color: rgba(244, 247, 251, 0.5);
  color: var(--color-text-invert);
}

.btn-outline:hover {
  background: rgba(244, 247, 251, 0.12);
  border-color: var(--color-text-invert);
}

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

.btn-dark-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* ===== Top Info Bar ===== */
.topbar {
  background: var(--color-primary-dark);
  color: rgba(244, 247, 251, 0.85);
  font-size: 0.85rem;
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  padding-bottom: 8px;
  gap: 12px;
  flex-wrap: wrap;
}

.topbar-left {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.topbar a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition);
}

.topbar a:hover {
  color: var(--color-accent);
}

.topbar-badges {
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.topbar-badges span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 var(--color-border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

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

.brand-logo-img {
  height: 58px;
  width: auto;
  flex-shrink: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--color-accent);
  transition: width var(--transition);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  z-index: 1100;
}

.nav-toggle span {
  width: 26px;
  height: 3px;
  background: var(--color-primary-dark);
  border-radius: 3px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary) 55%, var(--color-primary-light));
  color: var(--color-text-invert);
  overflow: hidden;
  padding: 100px 0 70px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(255,255,255,0.05) 0 2px, transparent 2px 90px);
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245, 166, 35, 0.16);
  border: 1px solid rgba(245, 166, 35, 0.4);
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero h1 .accent {
  color: var(--color-accent);
}

.hero p {
  font-size: 1.08rem;
  color: rgba(244, 247, 251, 0.85);
  max-width: 560px;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 28px;
}

.hero-stats div {
  border-left: 2px solid rgba(245, 166, 35, 0.5);
  padding-left: 12px;
}

.hero-stats strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: #fff;
}

.hero-stats span {
  font-size: 0.8rem;
  color: rgba(244, 247, 251, 0.75);
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual svg {
  width: 100%;
  max-width: 460px;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.28));
}

/* ===== Marquee / Trust strip ===== */
.trust-strip {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 22px 0;
}

.trust-strip .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--color-primary-dark);
  font-size: 0.92rem;
}

.trust-item svg {
  width: 26px;
  height: 26px;
  color: var(--color-accent-dark);
  flex-shrink: 0;
}

/* ===== About ===== */
.about {
  background: var(--color-bg);
}

.about .container {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-visual .frame {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-md);
}

.about-visual svg {
  width: 100%;
  height: auto;
}

.about-badge {
  position: absolute;
  bottom: -18px;
  right: -18px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  min-width: 130px;
}

.about-badge strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-accent);
}

.about-badge span {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.about-content .eyebrow {
  margin-bottom: 14px;
}

.about-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.3rem);
  color: var(--color-primary-dark);
  margin-bottom: 18px;
  font-weight: 700;
}

.about-content p {
  color: var(--color-text-light);
  margin-bottom: 18px;
}

.about-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 26px 0 32px;
}

.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.94rem;
}

.about-list svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent-dark);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== Products ===== */
.products {
  background: var(--color-bg-alt);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}

.product-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(11, 61, 120, 0.18);
}

.product-icon {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-icon svg {
  width: 32px;
  height: 32px;
  color: #fff;
}

.product-card h3 {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  color: var(--color-primary-dark);
  font-weight: 700;
}

.product-card p {
  color: var(--color-text-light);
  font-size: 0.92rem;
  flex-grow: 1;
}

.product-tag {
  display: inline-flex;
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  background: rgba(245, 166, 35, 0.12);
  padding: 5px 12px;
  border-radius: 999px;
}

.products-footnote {
  text-align: center;
  margin-top: 42px;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* ===== Trademarks ===== */
.trademarks {
  background: var(--color-primary-dark);
  color: var(--color-text-invert);
  position: relative;
  overflow: hidden;
}

.trademarks::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 20%, rgba(245,166,35,0.12), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(26,90,168,0.35), transparent 45%);
  pointer-events: none;
}

.trademarks .section-header h2 {
  color: #fff;
}

.trademarks .section-header p {
  color: rgba(244, 247, 251, 0.75);
}

.trademark-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
  z-index: 1;
}

.trademark-card {
  background: rgba(244, 247, 251, 0.06);
  border: 1px solid rgba(244, 247, 251, 0.14);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  text-align: center;
  transition: transform var(--transition), background var(--transition);
}

.trademark-card:hover {
  transform: translateY(-6px);
  background: rgba(244, 247, 251, 0.1);
}

.trademark-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  margin-bottom: 18px;
  color: var(--color-primary-dark);
}

.trademark-logo.gold { background: linear-gradient(135deg, #f6d365, #f0a80f); }
.trademark-logo.floxima { background: linear-gradient(135deg, #7ee0d0, #21b6a8); }
.trademark-logo.jalratna { background: linear-gradient(135deg, #9fd6ff, #4a9eea); }

.trademark-card p {
  color: rgba(244, 247, 251, 0.78);
  font-size: 0.94rem;
}

.trademark-card span.reg {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 700;
}

/* ===== Certification ===== */
.certification {
  background: var(--color-bg);
}

.cert-wrap {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 50px;
  align-items: center;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 50px;
  border: 1px solid var(--color-border);
}

.cert-badge {
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-badge svg {
  width: 190px;
  height: 190px;
}

.cert-text .eyebrow {
  margin-bottom: 14px;
}

.cert-text h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 2.8vw, 2.1rem);
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  font-weight: 700;
}

.cert-text p {
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.cert-points {
  display: grid;
  gap: 12px;
}

.cert-points li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-weight: 600;
  font-size: 0.94rem;
}

.cert-points svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent-dark);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== Why Choose Us ===== */
.why-us {
  background: var(--color-bg-alt);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}

.why-card {
  background: var(--color-bg);
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.why-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.why-card .icon-circle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(11, 61, 120, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}

.why-card .icon-circle svg {
  width: 30px;
  height: 30px;
  color: var(--color-primary);
}

.why-card h3 {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
  font-weight: 700;
}

.why-card p {
  color: var(--color-text-light);
  font-size: 0.9rem;
}

/* ===== Applications strip ===== */
.applications {
  background: var(--color-bg);
}

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

.app-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: border-color var(--transition), background var(--transition);
}

.app-card:hover {
  border-color: var(--color-accent);
  background: rgba(245, 166, 35, 0.05);
}

.app-card svg {
  width: 30px;
  height: 30px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.app-card span {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-text);
}

/* ===== CTA Band ===== */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  text-align: center;
}

.cta-band h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 16px;
  font-weight: 700;
}

.cta-band p {
  color: rgba(244, 247, 251, 0.85);
  max-width: 560px;
  margin: 0 auto 30px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Contact ===== */
.contact {
  background: var(--color-bg-alt);
}

.contact-wrap {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 46px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.contact-card {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--color-border);
  display: flex;
  gap: 16px;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
}

.contact-card .icon-circle {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(11, 61, 120, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-card .icon-circle svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.contact-card h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
  font-weight: 700;
}

.contact-card p, .contact-card a {
  color: var(--color-text-light);
  font-size: 0.92rem;
  display: block;
}

.contact-form {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 13px 16px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  font-family: inherit;
  font-size: 0.94rem;
  color: var(--color-text);
  background: var(--color-bg-alt);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(11, 61, 120, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

.form-note {
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin-top: 12px;
  text-align: center;
}

.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  background: rgba(34, 197, 94, 0.12);
  color: #15803d;
  padding: 14px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 16px;
}

.form-success.show {
  display: flex;
}

.form-success svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ===== Map ===== */
.map-wrap {
  margin-top: 50px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.map-wrap iframe {
  width: 100%;
  height: 360px;
  border: 0;
  display: block;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(244, 247, 251, 0.75);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(244, 247, 251, 0.1);
}

.footer-brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  padding: 14px 22px;
  border-radius: 14px;
  margin-bottom: 18px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
}

.footer-brand-badge .brand-logo-img {
  height: 48px;
}

.footer-col p {
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(244, 247, 251, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
}

.footer-social a:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
}

.footer-social svg {
  width: 17px;
  height: 17px;
  color: #fff;
}

.footer-col h4 {
  font-family: var(--font-heading);
  color: #fff;
  font-size: 1rem;
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  font-size: 0.92rem;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-col ul a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.92rem;
  margin-bottom: 14px;
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom a:hover {
  color: var(--color-accent);
}

/* ===== Back to top ===== */
.back-to-top {
  position: fixed;
  bottom: 26px;
  right: 26px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition), visibility var(--transition);
  z-index: 900;
  border: none;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-dark);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    grid-template-columns: repeat(4, auto);
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-visual svg {
    max-width: 320px;
  }

  .about .container {
    grid-template-columns: 1fr;
  }

  .about-visual {
    max-width: 460px;
    margin: 0 auto;
  }

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

  .trademark-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

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

  .cert-wrap {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 40px 30px;
  }

  .cert-points li {
    text-align: left;
  }

  .cert-badge svg {
    width: 150px;
    height: 150px;
  }

  .contact-wrap {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 85%);
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 100px 32px 32px;
    gap: 36px;
    box-shadow: -10px 0 40px rgba(0,0,0,0.15);
    transition: right var(--transition);
    z-index: 1050;
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-links {
    flex-direction: column;
    gap: 22px;
    width: 100%;
  }

  .nav-links a {
    display: block;
    font-size: 1.05rem;
  }

  .nav-cta {
    width: 100%;
  }

  .nav-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(7, 42, 84, 0.45);
    z-index: 1040;
  }

  .nav-overlay.show {
    display: block;
  }

  .topbar-left span:nth-child(3) {
    display: none;
  }
}

@media (max-width: 700px) {
  section {
    padding: 64px 0;
  }

  .hero {
    padding: 80px 0 50px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, auto);
    gap: 22px 32px;
  }

  .product-grid,
  .why-grid,
  .app-grid {
    grid-template-columns: 1fr;
  }

  .trademark-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .contact-form {
    padding: 26px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-badges span:nth-child(2) {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .about-badge {
    position: static;
    margin-top: 18px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    justify-content: center;
  }
}