/* ========================================
   AnshuLab — Official Website Styles
   Pure CSS · Mobile First · Production Ready
   ======================================== */

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: #111111;
  background-color: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

/* ---------- Design Tokens ---------- */
:root {
  --color-white: #ffffff;
  --color-black: #111111;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #eeeeee;
  --color-gray-300: #e0e0e0;
  --color-gray-400: #bdbdbd;
  --color-gray-500: #9e9e9e;
  --color-gray-600: #757575;
  --color-gray-700: #616161;
  --color-gray-800: #424242;
  --color-gray-900: #212121;
  --color-purple: #7c3aed;
  --color-purple-light: #8b5cf6;
  --color-purple-dark: #6d28d9;
  --color-purple-bg: #f5f3ff;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.06), 0 4px 6px rgba(0, 0, 0, 0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;
  --font-size-5xl: 3.5rem;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;
  --max-width: 1200px;
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

.section {
  padding-top: var(--spacing-4xl);
  padding-bottom: var(--spacing-4xl);
}

.section-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-purple);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-sm);
}

.section-heading {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-black);
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
}

.section-description {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: 1.7;
  max-width: 600px;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header .section-label {
  display: inline-block;
}

.section-header .section-heading {
  text-align: center;
}

.section-header .section-description {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 0.8125rem 1.75rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  line-height: 1;
  gap: var(--spacing-sm);
  letter-spacing: 0.01em;
}

.btn-primary {
  background-color: var(--color-purple);
  color: var(--color-white);
  box-shadow: 0 1px 2px rgba(124, 58, 237, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-purple-dark);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-black);
  border: 1px solid var(--color-gray-300);
}

.btn-secondary:hover {
  border-color: var(--color-gray-400);
  background-color: var(--color-gray-50);
  transform: translateY(-1px);
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-black);
}

.navbar-logo img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.navbar-links {
  display: none;
  align-items: center;
  gap: var(--spacing-xl);
}

.navbar-links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
  position: relative;
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-purple);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.navbar-links a:hover {
  color: var(--color-black);
}

.navbar-links a:hover::after {
  width: 100%;
}

.navbar-actions {
  display: none;
}

.navbar-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.navbar-toggle:hover {
  background-color: var(--color-gray-100);
}

.navbar-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-black);
  border-radius: 1px;
  transition: all var(--transition-base);
}

.navbar-toggle span + span {
  margin-top: 5px;
}

.navbar-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Overlay */
.mobile-nav {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-white);
  z-index: 999;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-xl) var(--spacing-lg);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.mobile-nav.active {
  transform: translateX(0);
}

.mobile-nav a {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-black);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-gray-100);
  transition: color var(--transition-fast);
}

.mobile-nav a:hover {
  color: var(--color-purple);
}

.mobile-nav .btn-primary {
  margin-top: var(--spacing-xl);
  text-align: center;
}

/* ---------- Hero ---------- */
.hero {
  padding-top: var(--spacing-4xl);
  padding-bottom: var(--spacing-4xl);
  text-align: center;
}

.hero-logo {
  width: 72px;
  height: 72px;
  object-fit: contain;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-xl);
}

.hero-heading {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-black);
  line-height: 1.15;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.025em;
}

.hero-heading .line-break {
  display: block;
}

.hero-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: 1.7;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-2xl);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.hero-actions .btn {
  width: 100%;
  max-width: 260px;
}

/* ---------- About ---------- */
.about {
  background-color: var(--color-gray-50);
}

.about .container {
  text-align: center;
}

.about .section-label {
  display: inline-block;
}

.about .section-heading {
  text-align: center;
}

.about .section-description {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ---------- Products ---------- */
.products {
  background-color: var(--color-white);
}

.products-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.products-header .section-heading {
  text-align: center;
}

.products-header .section-description {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

.product-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl) var(--spacing-xl);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  background-color: var(--color-purple);
  border-radius: 0 0 3px 3px;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.product-card:hover {
  border-color: var(--color-purple-light);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--color-purple-bg);
  transform: translateY(-4px);
}

.product-card:hover::before {
  opacity: 1;
}

.product-card-logo {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-lg);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: all var(--transition-base);
}

.product-card-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-full);
}

.product-card:hover .product-card-logo {
  border-color: var(--color-gray-300);
  box-shadow: var(--shadow-sm);
}

.product-card-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.01em;
}

.product-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: 1.6;
  margin-bottom: var(--spacing-xl);
}

.product-card .btn {
  margin-top: auto;
}

/* ---------- Why AnshuLab ---------- */
.why {
  background-color: var(--color-gray-50);
}

.why-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.why-header .section-heading {
  text-align: center;
}

.why-header .section-description {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.why-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-base);
}

.why-card:hover {
  border-color: var(--color-purple-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.why-card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-purple-bg);
  border-radius: var(--radius-md);
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-base);
}

.why-card:hover .why-card-icon {
  background-color: var(--color-purple);
}

.why-card:hover .why-card-icon svg {
  color: var(--color-white);
}

.why-card-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-purple);
  transition: color var(--transition-base);
}

.why-card-title {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-xs);
}

.why-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* ---------- Contact ---------- */
.contact {
  background-color: var(--color-white);
}

.contact-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.contact-header .section-heading {
  text-align: center;
}

.contact-header .section-description {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) var(--spacing-xl);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  text-decoration: none;
  color: var(--color-black);
}

.contact-item:hover {
  border-color: var(--color-purple-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.contact-item:hover .contact-item-icon {
  background-color: var(--color-purple);
}

.contact-item:hover .contact-item-icon svg {
  color: var(--color-white);
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-purple-bg);
  border-radius: var(--radius-md);
  flex-shrink: 0;
  transition: background-color var(--transition-base);
}

.contact-item-icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-purple);
  transition: color var(--transition-base);
}

.contact-item-label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.contact-item-value {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-black);
}

/* ---------- Footer ---------- */
.footer {
  background-color: var(--color-gray-50);
  border-top: 1px solid var(--color-gray-200);
  padding-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-md);
}

.footer-brand img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.footer-brand-desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: 1.7;
  max-width: 300px;
}

.footer-col-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col ul li + li {
  margin-top: var(--spacing-sm);
}

.footer-col a {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
  position: relative;
}

.footer-col a:hover {
  color: var(--color-purple);
}

.footer-bottom {
  border-top: 1px solid var(--color-gray-200);
  padding-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  text-align: center;
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-socials a {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-gray-500);
  transition: all var(--transition-fast);
  border: 1px solid var(--color-gray-200);
}

.footer-socials a:hover {
  color: var(--color-white);
  background-color: var(--color-purple);
  border-color: var(--color-purple);
}

.footer-socials svg {
  width: 18px;
  height: 18px;
}

/* ========================================
   RESPONSIVE BREAKPOINTS
   ======================================== */

/* ---------- Tablet (640px) ---------- */
@media (min-width: 640px) {
  .section-heading {
    font-size: var(--font-size-3xl);
  }

  .hero-heading {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-md);
  }

  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }

  .hero-actions .btn {
    width: auto;
  }

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

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

  .contact-grid {
    grid-template-columns: repeat(3, 1fr);
    max-width: 100%;
  }

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

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ---------- Desktop (1024px) ---------- */
@media (min-width: 1024px) {
  .section {
    padding-top: var(--spacing-5xl);
    padding-bottom: var(--spacing-5xl);
  }

  .section-heading {
    font-size: var(--font-size-4xl);
  }

  .container {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }

  /* Navbar Desktop */
  .navbar-toggle {
    display: none;
  }

  .navbar-links {
    display: flex;
  }

  .navbar-actions {
    display: block;
  }

  .mobile-nav {
    display: none !important;
  }

  /* Hero Desktop */
  .hero {
    padding-top: var(--spacing-5xl);
    padding-bottom: var(--spacing-5xl);
  }

  .hero-logo {
    width: 88px;
    height: 88px;
    margin-bottom: var(--spacing-2xl);
  }

  .hero-heading {
    font-size: var(--font-size-5xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
    max-width: 580px;
  }

  /* Products Desktop */
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
  }

  .product-card {
    padding: var(--spacing-2xl);
  }

  .product-card-logo {
    width: 80px;
    height: 80px;
  }

  /* Why Desktop */
  .why-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
  }

  /* Footer Desktop */
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* ---------- Large Desktop (1280px) ---------- */
@media (min-width: 1280px) {
  .hero-heading {
    font-size: var(--font-size-4xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ---------- Accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-purple);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background-color: var(--color-purple-bg);
  color: var(--color-purple-dark);
}