/* ============================================
   Lambda Tech - Main Stylesheet
   ============================================ */

/* --------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------- */
:root {
  /* Colors - Dark Tech Theme */
  --color-bg-primary: #0a0a14;
  --color-bg-secondary: #12121f;
  --color-bg-card: rgba(20, 20, 40, 0.8);

  --color-text-primary: #ffffff;
  --color-text-secondary: #a0a0b0;
  --color-text-muted: #6b6b7b;

  /* Accent colors - Royal Purple Theme */
  --color-accent-primary: #8b5cf6;
  --color-accent-secondary: #7c3aed;
  --color-accent-tertiary: #a78bfa;
  --color-accent-gradient: linear-gradient(135deg, #8b5cf6, #7c3aed, #a78bfa);

  /* Borders */
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-hover: rgba(255, 255, 255, 0.2);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Font sizes */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --container-max-width: 1200px;
  --nav-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

ul, ol {
  list-style: none;
}

/* --------------------------------------------
   Utility Classes
   -------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.gradient-text {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section {
  padding: var(--space-20) 0;
}

.section__title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-12);
}

/* --------------------------------------------
   Button Components
   -------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.btn--primary {
  background: var(--color-accent-gradient);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

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

/* --------------------------------------------
   Navigation
   -------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: all var(--transition-base);
}

.nav--scrolled {
  background: rgba(10, 10, 20, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
}

.nav__logo-img {
  height: 40px;
  width: auto;
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  padding: 0;
  z-index: 1001;
}

.nav__toggle-bar {
  width: 100%;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav__toggle.active .nav__toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active .nav__toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

.nav__menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--color-bg-secondary);
  padding: calc(var(--nav-height) + var(--space-8)) var(--space-8) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  transition: right var(--transition-base);
  border-left: 1px solid var(--color-border);
}

.nav__menu.active {
  right: 0;
}

.nav__link {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-accent-primary);
}

/* --------------------------------------------
   Hero Section
   -------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--nav-height) var(--space-6) var(--space-12);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(167, 139, 250, 0.1) 0%, transparent 50%);
  animation: bgPulse 8s ease-in-out infinite alternate;
}

@keyframes bgPulse {
  0% {
    opacity: 0.8;
    transform: scale(1);
  }
  100% {
    opacity: 1;
    transform: scale(1.05);
  }
}

.hero__content {
  position: relative;
  text-align: center;
  max-width: 800px;
}

.hero__logo {
  display: block;
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-8);
}

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-8);
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-text-muted);
  animation: bounce 2s ease-in-out infinite;
}

.hero__scroll-icon {
  width: 32px;
  height: 32px;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

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

.products__grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.product-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.product-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl), 0 0 60px rgba(139, 92, 246, 0.1);
}

.product-card__icon-wrapper {
  width: 100px;
  height: 100px;
  margin-bottom: var(--space-6);
}

.product-card__icon {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.product-card__name {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.product-card__tagline {
  font-size: var(--font-size-base);
  color: var(--color-accent-primary);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.product-card__description {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.product-card__features {
  margin-bottom: var(--space-6);
}

.product-card__features li {
  position: relative;
  padding-left: var(--space-6);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-2);
}

.product-card__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  background: var(--color-accent-gradient);
  border-radius: 50%;
}

.product-card__badge {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: rgba(139, 92, 246, 0.2);
  color: var(--color-accent-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

/* --------------------------------------------
   About Section
   -------------------------------------------- */
.about__story {
  max-width: 700px;
  margin: 0 auto var(--space-12);
  text-align: center;
}

.about__story p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.about__values {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.value-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition-base);
}

.value-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.value-card__icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-lg);
}

.value-card__icon svg {
  width: 28px;
  height: 28px;
  stroke: white;
}

.value-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.value-card__description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
}

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

.contact__card {
  max-width: 500px;
  margin: 0 auto;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  text-align: center;
  transition: all var(--transition-base);
}

.contact__card:hover {
  border-color: var(--color-border-hover);
}

.contact__icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-lg);
}

.contact__icon svg {
  width: 28px;
  height: 28px;
  stroke: white;
}

.contact__label {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.contact__email {
  display: inline-block;
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-accent-primary);
  transition: color var(--transition-fast);
}

.contact__email:hover {
  color: var(--color-accent-secondary);
}

/* --------------------------------------------
   Footer
   -------------------------------------------- */
.footer {
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-10) 0;
}

.footer__container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  text-align: center;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.footer__logo {
  width: 40px;
  height: 40px;
}

.footer__copyright {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.footer__nav {
  display: flex;
  gap: var(--space-6);
}

.footer__link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-accent-primary);
}

/* --------------------------------------------
   Animations
   -------------------------------------------- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger animations */
.products__grid .animate-on-scroll:nth-child(2) {
  transition-delay: 0.15s;
}

.about__values .animate-on-scroll:nth-child(2) {
  transition-delay: 0.15s;
}

.about__values .animate-on-scroll:nth-child(3) {
  transition-delay: 0.3s;
}

/* --------------------------------------------
   Responsive Styles
   -------------------------------------------- */

/* Tablet and up */
@media (min-width: 768px) {
  :root {
    --font-size-5xl: 3.5rem;
    --font-size-4xl: 3rem;
  }

  .nav__toggle {
    display: none;
  }

  .nav__menu {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    padding: 0;
    flex-direction: row;
    gap: var(--space-8);
    border: none;
  }

  .nav__link {
    font-size: var(--font-size-base);
  }

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

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

  .products__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

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

  .footer__container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }

  .footer__brand {
    flex-direction: row;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  :root {
    --font-size-5xl: 4rem;
  }

  .section {
    padding: var(--space-24) 0;
  }

  .hero__content {
    max-width: 900px;
  }

  .product-card {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-8);
    align-items: start;
  }

  .product-card__icon-wrapper {
    width: 120px;
    height: 120px;
    margin-bottom: 0;
  }
}

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

  html {
    scroll-behavior: auto;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}