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

:root {
  --primary-bg: #ffffff;
  --text-color: #000000;
  --text-secondary: #666666;
  --hover-color: #333333;
  --border-color: #e5e5e5;
  --spacing-unit: 8px;
}

body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--hover-color);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

/* Header */
.header {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--border-color);
}

.header-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.branding {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.site-title {
  font-size: 48px;
  font-weight: 300;
  letter-spacing: -0.5px;
}

.site-title a {
  color: var(--text-color);
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 30px;
  align-items: center;
}

.main-nav a,
.main-nav button {
  font-size: 18px;
  font-weight: 400;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 0;
  font-family: inherit;
}

.work-toggle {
  display: none;
}

.work-toggle::after {
  content: " ▾";
  font-size: 14px;
}

.subtitle {
  font-size: 32px;
  font-weight: 300;
  color: var(--text-color);
}

.subtitle a {
  color: var(--text-color);
}

/* Main Content */
.main-content {
  padding: 60px 0 100px;
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 40px;
  margin-bottom: 80px;
}

.portfolio-item {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.portfolio-link {
  display: block;
  overflow: hidden;
  border-radius: 4px;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.portfolio-link:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.portfolio-link img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.portfolio-link:hover img {
  transform: scale(1.02);
}

.portfolio-category {
  font-size: 14px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* Contact Section */
.contact-section {
  padding: 40px 0;
}

.contact-section h6 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.contact-section a {
  font-size: 18px;
  color: var(--text-color);
}

.contact-section a:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  margin-top: 60px;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer p {
  font-size: 16px;
  color: var(--text-secondary);
}

.social-bar {
  display: flex;
  list-style: none;
  gap: 20px;
}

.social-bar a {
  display: block;
  width: 24px;
  height: 24px;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.social-bar a:hover {
  opacity: 1;
}

.social-bar img {
  width: 100%;
  height: 100%;
  display: block;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }

  .header {
    padding: 40px 0 30px;
  }

  .site-title {
    font-size: 36px;
  }

  .subtitle {
    font-size: 24px;
  }

  .main-nav ul {
    gap: 20px;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .main-content {
    padding: 40px 0 60px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .site-title {
    font-size: 28px;
  }

  .subtitle {
    font-size: 20px;
  }

  .main-nav a,
  .main-nav button {
    font-size: 16px;
  }

  .branding {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* About Page */
.about-page {
  padding: 80px 0 100px;
}

.about-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  align-items: start;
}

.about-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.about-content p {
  font-size: 18px;
  line-height: 1.8;
  margin-bottom: 24px;
  color: var(--text-color);
}

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

.main-nav .active {
  font-weight: 600;
  position: relative;
}

.main-nav .active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--text-color);
}

/* About Page Responsive */
@media (max-width: 768px) {
  .about-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-image img {
    max-width: 400px;
    margin: 0 auto;
    display: block;
  }

  .about-content p {
    font-size: 16px;
  }

  .about-page {
    padding: 60px 0 80px;
  }
}

/* Portfolio Detail Page Template */
.project-page {
  padding: 80px 0 100px;
}

.project-header {
  text-align: center;
  margin-bottom: 60px;
}

.project-title {
  font-size: 48px;
  font-weight: 300;
  margin-bottom: 16px;
}

.project-meta {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.project-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.project-meta-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  font-weight: 600;
}

.project-meta-value {
  font-size: 16px;
  color: var(--text-color);
}

.project-content {
  max-width: 1000px;
  margin: 0 auto;
}

.project-section {
  margin-bottom: 80px;
}

.project-section h3 {
  font-size: 32px;
  font-weight: 400;
  margin-bottom: 24px;
}

.project-section p {
  font-size: 18px;
  line-height: 1.8;
  margin-bottom: 20px;
  color: var(--text-color);
}

.project-image {
  width: 100%;
  margin: 40px 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.project-image img {
  width: 100%;
  height: auto;
  display: block;
}

.project-image-caption {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 12px;
  font-style: italic;
}

.project-images-row {
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: flex-start;
  margin: 40px 0;
  flex-wrap: wrap;
}

.project-images-row .project-image {
  flex: 0 1 calc(33.333% - 14px);
  max-width: 300px;
  margin: 0;
}

.notion-link-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 48px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(102, 126, 234, 0.3);
}

.notion-link-card h3 {
  color: white;
  margin-bottom: 16px;
}

.notion-link-card p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
  font-size: 16px;
}

.notion-link-button {
  display: inline-block;
  background: white;
  color: #667eea;
  padding: 16px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  text-decoration: none;
}

.notion-link-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  color: #667eea;
}

.project-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 60px;
  border-top: 1px solid var(--border-color);
  margin-top: 80px;
}

.project-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 500;
  transition: transform 0.2s ease;
}

.project-nav-link:hover {
  transform: translateX(-4px);
}

.project-nav-link.next:hover {
  transform: translateX(4px);
}

/* Project Detail Page Responsive */
@media (max-width: 768px) {
  .project-title {
    font-size: 36px;
  }

  .project-meta {
    gap: 24px;
  }

  .project-section h3 {
    font-size: 28px;
  }

  .project-section p {
    font-size: 16px;
  }

  .project-page {
    padding: 60px 0 80px;
  }

  .project-navigation {
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
  }

  .notion-link-card {
    padding: 32px 24px;
  }

  .notion-link-button {
    padding: 14px 24px;
    font-size: 15px;
  }
}