/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --color-primary: #00d4aa;
  --color-primary-dark: #00b894;
  --color-secondary: #6c5ce7;
  --color-accent: #fd79a8;
  
  --color-bg-primary: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-tertiary: #21262d;
  
  --color-text-primary: #f0f6fc;
  --color-text-secondary: #8b949e;
  --color-text-muted: #6e7681;
  
  --color-border: #30363d;
  --color-border-muted: #21262d;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Container */
  --container-max-width: 1200px;
  --container-padding: 1rem;
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

ul {
  list-style: none;
}

/* ===== UTILITIES ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

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

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-bg-primary);
  border-color: var(--color-primary);
}

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

.btn--secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

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

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

.btn--outline:hover {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-primary);
}

.btn--large {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: var(--transition-normal);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.nav__logo-text {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

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

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

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.nav__toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: var(--transition-fast);
}

/* ===== MAIN ===== */
.main {
  padding-top: 80px;
}

/* ===== HERO SECTION ===== */
.hero {
  padding: var(--spacing-3xl) 0;
  background: radial-gradient(ellipse at center, rgba(0, 212, 170, 0.1) 0%, transparent 70%);
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
}

.hero__title-highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

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

.hero__code-block {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  max-width: 500px;
  width: 100%;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background-color: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}

.code-dots {
  display: flex;
  gap: 0.5rem;
}

.code-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-text-muted);
}

.code-dots span:nth-child(1) { background-color: #ff5f56; }
.code-dots span:nth-child(2) { background-color: #ffbd2e; }
.code-dots span:nth-child(3) { background-color: #27ca3f; }

.code-title {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.code-content {
  padding: 1.5rem;
}

.code-content pre {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  overflow-x: auto;
}

.code-comment { color: #6a737d; }
.code-keyword { color: #f97583; }
.code-variable { color: #79b8ff; }
.code-function { color: #b392f0; }
.code-string { color: #9ecbff; }
.code-property { color: #ffab70; }

/* ===== SOCIAL PROOF ===== */
.social-proof {
  padding: var(--spacing-2xl) 0;
  background-color: var(--color-bg-secondary);
}

.social-proof__title {
  text-align: center;
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.social-proof__logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
  align-items: center;
}

.logo-item {
  text-align: center;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  padding: var(--spacing-md);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.logo-item:hover {
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

/* ===== PROCESS SECTION ===== */
.process {
  padding: var(--spacing-3xl) 0;
}

.process__steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.step {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition-normal);
}

.step:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.step__number {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  min-width: 3rem;
}

.step__content {
  flex: 1;
}

.step__title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

.step__description {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.step__icon {
  color: var(--color-primary);
  opacity: 0.7;
}

/* ===== FEATURES SECTION ===== */
.features {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-bg-secondary);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.feature {
  padding: var(--spacing-xl);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition-normal);
}

.feature:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  color: var(--color-bg-primary);
}

.feature__title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

.feature__description {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
  padding: var(--spacing-3xl) 0;
}

.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.testimonial {
  padding: var(--spacing-xl);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition-normal);
}

.testimonial:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.testimonial__content {
  margin-bottom: var(--spacing-lg);
}

.testimonial__quote {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  font-style: italic;
}

.testimonial__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.testimonial__avatar {
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  color: var(--color-bg-primary);
}

.testimonial__name {
  font-weight: var(--font-weight-semibold);
  margin-bottom: 0.25rem;
}

.testimonial__role {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* ===== PRICING PREVIEW SECTION ===== */
.pricing-preview {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-bg-secondary);
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.pricing-card {
  position: relative;
  padding: var(--spacing-xl);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition-normal);
}

.pricing-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pricing-card--featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card__badge {
  position: absolute;
  top: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-bg-primary);
  padding: 0.25rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
}

.pricing-card__header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.pricing-card__title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

.pricing-card__price {
  margin-bottom: var(--spacing-sm);
}

.pricing-card__amount {
  font-size: 2rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.pricing-card__period {
  color: var(--color-text-secondary);
  font-size: 1rem;
}

.pricing-card__description {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.pricing-card__features {
  margin-bottom: var(--spacing-lg);
}

.pricing-card__features ul {
  space-y: var(--spacing-sm);
}

.pricing-card__features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.pricing-card__features li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.pricing-card__action {
  text-align: center;
}

.pricing-preview__cta {
  text-align: center;
}

/* ===== CTA SECTION ===== */
.cta {
  padding: var(--spacing-3xl) 0;
  background: radial-gradient(ellipse at center, rgba(108, 92, 231, 0.1) 0%, transparent 70%);
}

.cta__content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.cta__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
}

.cta__description {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

/* ===== FOOTER ===== */
.footer {
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

.footer__content {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-xl);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo-text {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
  display: block;
}

.footer__description {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-xl);
}

.footer__title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

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

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.footer__copyright {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.footer__social {
  display: flex;
  gap: var(--spacing-md);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background-color: var(--color-bg-tertiary);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }
  
  .nav__menu {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    flex-direction: column;
    gap: var(--spacing-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
  }
  
  .nav__menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav__list {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .nav__toggle {
    display: flex;
  }
  
  .hero__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }
  
  .hero__actions {
    justify-content: center;
  }
  
  .process__steps {
    grid-template-columns: 1fr;
  }
  
  .features__grid {
    grid-template-columns: 1fr;
  }
  
  .testimonials__grid {
    grid-template-columns: 1fr;
  }
  
  .pricing__grid {
    grid-template-columns: 1fr;
  }
  
  .footer__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .step {
    flex-direction: column;
    text-align: center;
  }
  
  .step__number {
    align-self: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* ===== SCROLL ANIMATIONS ===== */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ===== FOCUS STYLES ===== */
.btn:focus,
.nav__link:focus,
.footer__link:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== SELECTION STYLES ===== */
::selection {
  background-color: var(--color-primary);
  color: var(--color-bg-primary);
}

/* ===== SCROLLBAR STYLES ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background-color: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-primary);
}