/* Base */
:root {
  --bg: #ffffff;
  --text: #000000;
  --text-muted: #666666;
  --border: #e0e0e0;
  --grey: #999999;
  --button-bg: #333333;
  --button-text: #ffffff;
}

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

html, body { 
  height: 100%; 
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 40px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #000000;
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand {
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  font-size: 24px;
  letter-spacing: 0.2px;
}

.site-nav { 
  position: relative; 
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 22px;
  cursor: pointer;
}

.nav-list {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-list a {
  color: #ffffff;
  text-decoration: none;
  font-size: 16px;
  font-weight: 400;
  transition: opacity 0.2s;
}

.nav-list a:hover { 
  opacity: 0.7; 
}

.nav-list .cv-link {
  color: rgba(255, 255, 255, 0.7);
}

.nav-list .cta {
  color: #ffffff;
  font-weight: 500;
}

/* Hero */
.hero {
  padding: 120px 0 100px;
}

.hero-inner {
  max-width: 800px;
}

.hero h1 {
  font-size: 64px;
  line-height: 1.1;
  margin: 0 0 32px;
  font-weight: 700;
  color: var(--text);
}

.hero-description {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text);
  margin: 0;
  max-width: 700px;
}

/* Companies Section */
.companies-section {
  padding: 100px 0;
  text-align: center;
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text);
  margin: 0 0 60px;
}

.companies-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  align-items: center;
  justify-items: center;
  max-width: 100%;
  margin: 0 auto;
}

.company-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  text-align: center;
}

.company-logo img {
  max-width: 120px;
  max-height: 40px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: opacity 0.3s, filter 0.3s;
}

.company-logo img:hover {
  opacity: 1;
  filter: grayscale(0%);
}

/* Projects Section */
.projects-section {
  padding: 100px 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.project-card {
  display: flex;
  flex-direction: column;
}

.project-card a {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease;
}

.project-card a:hover {
  transform: translateY(-4px);
}

.project-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #f5f5f5;
  border-radius: 8px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.project-image img:hover {
  filter: grayscale(0%);
}

.project-placeholder {
  color: var(--text-muted);
  font-size: 14px;
}

.project-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.project-title {
  font-size: 24px;
  font-weight: 600;
  margin: 0;
  color: var(--text);
}

.project-chip {
  display: inline-block;
  padding: 4px 12px;
  background: #f5f5f5;
  color: var(--text);
  font-size: 12px;
  font-weight: 500;
  border-radius: 12px;
  text-transform: lowercase;
  letter-spacing: 0.3px;
}

.project-description {
  font-size: 16px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

/* About Section */
.about-section {
  padding: 100px 0;
}

.about-section.about-hero {
  padding: 140px 0 100px;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.about-text {
  max-width: 100%;
}

.section-heading {
  font-size: 32px;
  font-weight: 700;
  margin: 0 0 32px;
  color: var(--text);
}

.about-description {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text);
}

.about-description p {
  margin: 0 0 24px;
}

.about-description p:last-child {
  margin-bottom: 0;
}

.about-details {
  width: 100%;
}

.subsection-heading {
  font-size: 24px;
  font-weight: 600;
  margin: 0 0 32px;
  color: var(--text);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.skill-category {
  display: flex;
  flex-direction: column;
}

.skill-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 16px;
  color: var(--text);
}

.skill-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-list li {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
  padding: 4px 0;
  position: relative;
  padding-left: 20px;
}

.skill-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--text);
  font-weight: 600;
}

/* Testimonials Section */
.testimonials-section {
  padding: 100px 0;
  text-align: center;
}

.testimonial-container {
  width: 100%;
  margin: 0 auto;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.testimonials-wrapper {
  width: 100%;
  position: relative;
}

.testimonial-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--text);
  cursor: pointer;
  z-index: 10;
  transition: all 0.2s ease;
  padding: 0;
  line-height: 1;
}

.testimonial-arrow:hover {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.testimonial-arrow:active {
  transform: translateY(-50%) scale(0.95);
}

.testimonial-arrow-prev {
  left: -24px;
}

.testimonial-arrow-next {
  right: -24px;
}

.testimonial {
  margin: 0 0 40px;
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  text-align: left;
}

.testimonial p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  margin: 0 0 24px;
}

.testimonial-author {
  color: var(--text);
  font-size: 14px;
  margin: 0;
}

.testimonial-author strong {
  font-weight: 600;
}

.testimonial-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
  align-items: center;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid var(--grey);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s;
}

.dot.active {
  background: var(--grey);
  border-color: var(--grey);
}

/* Contact Section */
.contact-section {
  padding: 100px 0;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
}

.contact-heading {
  font-size: 24px;
  font-weight: 600;
  margin: 0 0 24px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.contact-icon {
  font-size: 20px;
}

.contact-text {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  margin: 0 0 32px;
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-link {
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  transition: opacity 0.2s;
}

.social-link:hover {
  opacity: 0.7;
}

.social-link svg {
  width: 24px;
  height: 24px;
}

/* Contact Form */
.contact-form {
  display: grid;
  gap: 24px;
}

.form-row {
  display: grid;
  gap: 8px;
}

label {
  font-weight: 500;
  font-size: 14px;
  color: var(--text);
}

input, textarea {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 16px;
  outline: none;
  font-family: inherit;
  font-size: 16px;
  transition: border-color 0.2s;
}

input:focus, textarea:focus {
  border-color: var(--text);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.error {
  color: #d32f2f;
  font-size: 12px;
  min-height: 16px;
}

.form-status {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 24px;
  border-radius: 4px;
  border: none;
  color: var(--button-text);
  text-decoration: none;
  background: var(--button-bg);
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.2s;
}

.button:hover {
  opacity: 0.9;
}

.button.primary {
  background: var(--button-bg);
  color: var(--button-text);
}

/* Responsive */
@media (max-width: 1024px) {
  .companies-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .contact-inner {
    gap: 60px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }
  
  .nav-toggle {
    display: inline-flex;
  }
  
  .nav-list {
    position: absolute;
    right: 0;
    top: 60px;
    background: #000000;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 16px;
    display: none;
    flex-direction: column;
    width: 220px;
    gap: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  }
  
  .nav-list.open {
    display: flex;
  }
  
  .hero {
    padding: 80px 0 60px;
  }
  
  .hero h1 {
    font-size: 48px;
  }
  
  .hero-description {
    font-size: 16px;
  }
  
  .companies-section,
  .projects-section,
  .about-section,
  .testimonials-section,
  .contact-section {
    padding: 60px 0;
  }
  
  .testimonial-arrow {
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
  
  .testimonial-arrow-prev {
    left: -20px;
  }
  
  .testimonial-arrow-next {
    right: -20px;
  }
  
  .testimonial-container {
    padding: 0 20px;
  }
  
  .about-section.about-hero {
    padding: 100px 0 60px;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .section-heading {
    font-size: 28px;
  }
  
  .about-description {
    font-size: 16px;
  }
  
  .companies-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .testimonial {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 36px;
  }
  
  .companies-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  
  .section-title {
    font-size: 12px;
    margin-bottom: 40px;
  }
}