:root {
  --c-primary: #0f172a;
  --c-secondary: #334155;
  --c-accent: #2563eb;
  --c-bg-light: #f1f5f9;
  --c-bg-white: #ffffff;
  --c-border: #e2e8f0;
  --c-text-main: #1e293b;
  --c-text-muted: #64748b;
  --c-white: #ffffff;

  --font-heading: "Outfit", sans-serif;
  --font-body: "Inter", sans-serif;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:
    0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-body);
  color: var(--c-text-main);
  background-color: var(--c-bg-light);
  line-height: 1.6;
  overflow-x: hidden;
}
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  color: var(--c-primary);
  font-weight: 700;
  line-height: 1.2;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 100px 0;
}
.section-white {
  background-color: var(--c-bg-white);
}
.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 1.125rem;
  text-align: center;
  color: var(--c-text-muted);
  margin-bottom: 50px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
}
.header-transparent {
  background-color: transparent;
}
.header-transparent.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}
.header-gray {
  background-color: #f8fafc;
  border-bottom: 1px solid var(--c-border);
}
.header-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}
.navbar-logo {
  height: 60px;
  width: auto;
}
.footer-logo-img {
  height: 80px;
  width: auto;
  filter: invert(1);
}
.logo {
  display: flex;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  gap: 8px;
  color: var(--c-primary);
}
.header-transparent:not(.scrolled) .logo img {
  filter: invert(1);
}
.logo-icon {
  display: flex;
  gap: 2px;
}
.logo-icon span {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: white;
  font-size: 0.9rem;
}
.bg-t {
  background: #0f172a;
}
.bg-p {
  background: #334155;
}
.bg-l {
  background: #2563eb;
}

.nav-list {
  display: flex;
  gap: 32px;
}
.nav-link {
  font-weight: 500;
  font-size: 1rem;
  color: var(--c-text-main);
}
.header-transparent:not(.scrolled) .nav-link {
  color: var(--c-white);
}
.nav-link:hover {
  color: var(--c-accent);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}
.mobile-menu-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background-color: var(--c-primary);
  transition: var(--transition);
}
.header-transparent:not(.scrolled) .mobile-menu-toggle span {
  background-color: var(--c-white);
}

.mobile-menu-active .mobile-menu-toggle span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.mobile-menu-active .mobile-menu-toggle span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-active .mobile-menu-toggle span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}
.mobile-menu-active .mobile-menu-toggle span {
  background-color: var(--c-primary) !important;
}

/* Hero */
.hero {
  position: relative;
  height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--c-white);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
  filter: brightness(0.6);
  transform: scale(1.05);
  transition: transform 10s linear;
}
.hero:hover .hero-bg {
  transform: scale(1);
}
.hero-content {
  z-index: 1;
  max-width: 900px;
  padding: 0 20px;
}
.hero-title {
  font-size: clamp(3rem, 8vw, 5rem);
  margin-bottom: 16px;
  color: #fff;
}
.hero-subtitle {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: 24px;
  color: #e2e8f0;
}
.hero-desc {
  font-size: 1.25rem;
  margin-bottom: 40px;
  color: #cbd5e1;
  font-weight: 300;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-top: 40px;
}
.stat-item {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 20px 40px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-heading);
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.875rem;
  color: #cbd5e1;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Grid Sections */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
  text-align: left;
}
.about-content h2 {
  font-size: 3rem;
  margin-bottom: 24px;
  position: relative;
}
.about-content h2::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--c-accent);
}
.about-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--c-text-main);
  margin-bottom: 30px;
}
.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.about-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  color: var(--c-primary);
}
.about-feature-item i {
  color: var(--c-accent);
  font-size: 1.25rem;
}
.about-image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}
.category-card {
  background: var(--c-bg-white);
  padding: 40px 30px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--c-border);
}
.category-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-accent);
}
.category-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}
.category-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--c-primary);
}

.standards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}
.standard-card {
  background: var(--c-bg-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}
.standard-image {
  height: 200px;
  overflow: hidden;
}
.standard-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.standard-body {
  padding: 30px;
  flex: 1;
}
.standard-card h3 {
  margin-bottom: 15px;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.standard-card p {
  color: var(--c-text-muted);
  font-size: 1.05rem;
}

/* Testimonials */
.testimonials-wrapper {
  padding: 20px 0;
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.testimonial-card {
  padding: 30px;
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--c-border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.testimonial-card::before {
  content: "\201C";
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 8rem;
  font-family: serif;
  color: #f1f5f9;
  line-height: 1;
  z-index: 0;
}
.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-accent);
}
.testimonial-text {
  font-size: 1.15rem;
  font-style: italic;
  margin-bottom: 30px;
  color: var(--c-text-main);
  position: relative;
  z-index: 1;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: auto;
  position: relative;
  z-index: 1;
}
.author-info h4 {
  font-size: 1.125rem;
  margin: 0;
}
.author-info span {
  font-size: 0.875rem;
  color: var(--c-text-muted);
}
.author-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--c-border);
}

/* Brand Wall */
.brand-wall {
  overflow: hidden;
  padding: 20px 0;
  background: #fff;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}
.brand-track {
  display: flex;
  width: calc(250px * 60);
  animation: scroll 80s linear infinite;
}
.brand-item {
  width: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 40px;
  filter: grayscale(1);
  transition: 0.3s;
}
.brand-item:hover {
  filter: grayscale(0);
  opacity: 1;
}
@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(calc(-250px * 30));
  }
}

/* CTA Area */
.cta-section {
  position: relative;
  padding: 120px 10px;
  color: white;
  text-align: center;
}
.cta-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  object-fit: cover;
  filter: brightness(0.25);
}
.cta-title {
  font-size: 3rem;
  margin-bottom: 20px;
  color: #ffffff;
}
.cta-subtitle {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.9);
}

/* Footer */
.footer {
  background: var(--c-primary);
  color: #94a3b8;
  padding: 80px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 2fr 1.2fr;
  gap: 80px;
  margin-bottom: 60px;
  align-items: start;
}
.footer-logo .logo-icon span {
  background: #fff;
  color: var(--c-primary);
}
.footer-logo {
  color: #fff;
  margin-bottom: 0;
  font-size: 1.75rem;
}
.footer-desc {
  line-height: 1.6;
  color: #fff;
  font-size: 1.05rem;
  max-width: 500px;
}
.footer-links {
  justify-items: end;
}
.footer-links ul li {
  margin-bottom: 12px;
}
.footer-links ul li a {
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  opacity: 0.9;
}
.footer-links ul li a:hover {
  text-decoration: none;
}
.footer-links ul li a:hover {
  color: #fff;
  padding-left: 5px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  text-align: center;
  font-size: 0.875rem;
}

/* Inner Content Page */
.inner-hero {
  padding: 160px 0 60px;
  background: var(--c-primary);
  color: white;
  text-align: center;
}
.inner-hero .page-title {
  color: white;
  margin: 0;
  font-size: 3rem;
}
.inner-content {
  padding: 80px 0;
  background: var(--c-bg-white);
}
.content-wrapper {
  max-width: 850px;
  margin: 0 auto;
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--c-text-main);
}
.content-wrapper h1,
.content-wrapper h2,
.content-wrapper h3 {
  color: var(--c-primary);
  margin-top: 40px;
  margin-bottom: 20px;
}
.text-center {
  text-align: center;
}
.content-wrapper ul {
  margin-bottom: 25px;
  padding-left: 20px;
}
.content-wrapper li {
  margin-bottom: 10px;
  list-style-type: square;
  color: var(--c-text-muted);
}
.content-wrapper p {
  margin-bottom: 20px;
}

/* Responsiveness */
@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  .about-content h2::after {
    left: 50%;
    transform: translateX(-50%);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }
  .mobile-menu-toggle {
    display: flex;
    margin-left: auto;
  }
  .nav-list {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--c-white);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    z-index: 1000;
  }
  .mobile-menu-active .nav-list {
    display: flex;
  }
  .mobile-menu-active .nav-link {
    color: var(--c-primary) !important;
    font-size: 1.5rem;
  }
  .mobile-menu-active {
    overflow: hidden;
  }
  .hero {
    height: auto;
    padding: 140px 0 80px;
  }
  .hero-stats {
    flex-direction: column;
    gap: 15px;
    margin-top: 30px;
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .hero-subtitle {
    font-size: 1.5rem;
  }
  .section-title {
    font-size: 2rem;
  }
  .trust-container {
    flex-direction: column;
    gap: 30px !important;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .about-features {
    grid-template-columns: 1fr;
  }
  .inner-hero .page-title {
    font-size: 2.25rem;
  }
  .categories-grid {
    grid-template-columns: 1fr 1fr;
    gap: 15px;
  }
  .category-card {
    padding: 25px 15px;
  }
  .category-name {
    font-size: 1.1rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  .footer-about,
  .footer-desc,
  .footer-links {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}