@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

:root {
  --color-primary: #121212;
  --color-secondary: #1E1E1E;
  --color-accent: #2E5BFF;
  --color-accent-hover: #1a44cc;
  --color-text: #f9fafb;
  --color-text-dark: #111827;
  --color-text-muted: #9ca3af;
  --color-bg: #0a0a0a;
  --color-bg-alt: #121212;
  --color-border: #262626;

  --font-family: 'Space Grotesk', sans-serif;
  --font-size-base: 18px;
  --line-height-base: 1.7;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.5);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.6);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.7);

  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;

  --container-width: 1200px;
  --article-width: 720px;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: #ffffff;
}

h1 { font-size: 3.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2.5rem; letter-spacing: -0.01em; }
h3 { font-size: 1.8rem; }

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

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

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

.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: var(--transition-base);
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

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

.btn-outline {
  border: 1px solid var(--color-border);
  background: transparent;
  color: #ffffff;
}

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

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-bg);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }
}

.hero {
  padding: var(--space-2xl) 0;
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

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

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin: var(--space-2xl) 0;
}

.stat-card {
  background-color: var(--color-secondary);
  padding: var(--space-xl);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.stat-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-5px);
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-xs);
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

.faq-section {
  padding: var(--space-2xl) 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-sm);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: var(--space-md) 0;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.2rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
  color: var(--color-text-muted);
}

.faq-item.active .faq-answer {
  max-height: 1000px;
  padding-bottom: var(--space-md);
}

.testimonial-slider {
  overflow: hidden;
  position: relative;
  padding: var(--space-xl) 0;
}

.testimonial-track {
  display: flex;
  transition: transform 0.5s ease-in-out;
}

.testimonial-card {
  min-width: 100%;
  padding: var(--space-xl);
  background-color: var(--color-secondary);
  border-radius: var(--radius-lg);
  font-style: italic;
  font-size: 1.2rem;
}

.testimonial-author {
  margin-top: var(--space-md);
  font-style: normal;
  font-weight: 600;
  color: var(--color-accent);
}

footer {
  background-color: var(--color-primary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
  color: var(--color-text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-xl);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-legal {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
  font-size: 0.9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.article-container {
  max-width: var(--article-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md);
}

.article-content h2 { margin-top: var(--space-xl); }
.article-content p { margin-bottom: var(--space-md); }
.article-content ul, .article-content ol { margin-bottom: var(--space-md); padding-left: var(--space-lg); }
.article-content li { margin-bottom: var(--space-xs); }

.author-box {
  margin-top: var(--space-2xl);
  padding: var(--space-xl);
  background-color: var(--color-secondary);
  border-radius: var(--radius-md);
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.author-img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--color-accent);
}

@media (max-width: 600px) {
  .author-box {
    flex-direction: column;
    text-align: center;
  }
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-secondary);
  border-top: 1px solid var(--color-accent);
  padding: var(--space-md);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}

@media (max-width: 768px) {
  .cookie-banner {
    flex-direction: column;
    text-align: center;
  }
}

.hidden {
  display: none !important;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.grid-asymmetric {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
}

.grid-item-wide { grid-column: span 8; }
.grid-item-narrow { grid-column: span 4; }

@media (max-width: 768px) {
  .grid-item-wide, .grid-item-narrow { grid-column: span 12; }
}

input, textarea {
  width: 100%;
  padding: 0.8rem;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: #ffffff;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.post-card {
  background-color: var(--color-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
  height: 100%;
}

.post-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
}

.post-card-img {
  aspect-ratio: 16/9;
  object-fit: cover;
}

.post-card-content {
  padding: var(--space-md);
}

.post-card-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.post-card-title {
  font-size: 1.3rem;
  margin-bottom: var(--space-sm);
}

.post-card-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.phase-model {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.phase-card {
  background: var(--color-secondary);
  padding: var(--space-lg);
  border-top: 4px solid var(--color-accent);
  cursor: pointer;
}

@media (max-width: 768px) {
  .phase-model {
    grid-template-columns: 1fr;
  }
}

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

@media (max-width: 768px) {
  .case-study-grid {
    grid-template-columns: 1fr;
  }
}