/* --- Design Tokens --- */
:root {
  --color-black: #0a0a0a;
  --color-black-light: #1a1a1a;
  --color-white: #ffffff;
  --color-gray: #f2f2f2;
  --color-gray-dark: #666666;
  --color-border: #e6e6e6;
  
  --font-main: 'Inter', sans-serif;
  
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 8rem;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease-out;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--color-white);
  color: var(--color-black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-xxl) 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--color-gray-dark);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
}

/* --- Typography & Buttons --- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-weight: 600;
  border-radius: 4px;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-black-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-black);
  border-color: var(--color-black);
}

.btn-secondary:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

/* --- Layout --- */
.layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.content {
  flex: 1;
}

/* --- Header --- */
.site-header {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-bold {
  font-weight: 800;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
}

.site-nav a {
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-dark);
}

.site-nav a:hover {
  color: var(--color-black);
}

/* --- Hero --- */
.hero {
  padding: var(--spacing-xxl) 0;
  min-height: 70vh;
  display: flex;
  align-items: center;
}

.hero-title {
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  max-width: 900px;
  margin-bottom: var(--spacing-lg);
}

.highlight {
  display: inline-block;
  background-color: var(--color-black);
  color: var(--color-white);
  padding: 0 0.5rem;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--color-gray-dark);
  max-width: 700px;
  margin-bottom: var(--spacing-xl);
}

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

/* --- Expertise --- */
.expertise {
  background-color: var(--color-gray);
}

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

.expertise-card {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-normal);
}

.expertise-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.expertise-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  font-weight: 800;
}

.expertise-card p {
  color: var(--color-gray-dark);
}

/* --- Portfolio --- */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}

.portfolio-card {
  display: flex;
  flex-direction: column;
  group: hover;
}

.portfolio-image {
  background-color: var(--color-gray);
  aspect-ratio: 4/3;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  position: relative;
}

.image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee), linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee);
  background-size: 20px 20px;
  background-position: 0 0, 10px 10px;
}

.portfolio-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.portfolio-card:hover .portfolio-image img {
  transform: scale(1.05);
}

.portfolio-category {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-dark);
  margin-bottom: 0.25rem;
  display: block;
}

.portfolio-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.portfolio-desc {
  color: var(--color-gray-dark);
}

/* --- About --- */
.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.about-image-col {
  aspect-ratio: 3/4;
  background-color: var(--color-black);
  overflow: hidden;
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter var(--transition-normal);
}

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

.profile-placeholder {
  width: 100%;
  height: 100%;
  background-color: var(--color-black);
}

.about-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
}

.about-subtitle {
  font-size: 1.5rem;
  color: var(--color-gray-dark);
  margin-bottom: var(--spacing-lg);
  font-weight: 400;
}

.about-bio p {
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

.about-cta {
  margin-top: var(--spacing-lg);
}

/* --- Contact --- */
.contact-container {
  max-width: 800px;
}

.contact-card {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: var(--spacing-xl);
  text-align: center;
}

.contact-card h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
}

.contact-email {
  display: inline-block;
  font-size: clamp(1.5rem, 4vw, 3rem);
  font-weight: 800;
  border-bottom: 2px solid transparent;
  margin-bottom: var(--spacing-xl);
}

.contact-email:hover {
  border-bottom-color: var(--color-white);
}

.social-links-large {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
}

.social-links-large a {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  font-size: 0.9rem;
}

.social-links-large a:hover {
  color: var(--color-gray);
}

/* --- Footer --- */
.site-footer {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--color-border);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-gray-dark);
  font-size: 0.9rem;
}

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

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .about-container {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}