/* Tech-Oriented Landing Page Styles */
:root {
  --color-black: #0a0a0a;
  --color-gray-dark: #1a1a1a;
  --color-gray: #666666;
  --color-gray-light: #999999;
  --color-gray-lighter: #e5e5e5;
  --color-white: #ffffff;
  --color-blue: #0071e3;
  --color-blue-hover: #0077ed;
  --color-green: #00d26a;
  --color-purple: #8b5cf6;
  --color-orange: #ff6b35;
  --color-bg-dark: #0d1117;
  --color-bg-code: #161b22;
  --color-border-code: #30363d;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  --max-width: 1200px;
  --content-width: 1000px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
  color: var(--color-white);
  line-height: 1.6;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: -0.022em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

.landing-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-black);
}

/* Navigation */
.nav {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  text-decoration: none;
  letter-spacing: -0.022em;
  font-family: 'JetBrains Mono', monospace;
}

.nav-logo-code {
  color: var(--color-green);
  font-weight: 400;
}

.nav-link {
  font-size: 1rem;
  color: var(--color-gray-lighter);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
  font-family: 'JetBrains Mono', monospace;
}

.nav-link:hover {
  color: var(--color-blue);
}

/* Hero Section */
.hero {
  flex: 1;
  padding: var(--spacing-xxl) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Coming Soon Notice */
.coming-soon-notice {
  width: 100%;
  max-width: 600px;
  background: rgba(255, 107, 53, 0.1);
  border: 2px solid var(--color-orange);
  border-radius: 12px;
  padding: var(--spacing-xl);
  animation: pulse-border 2s ease-in-out infinite;
}

@keyframes pulse-border {
  0%, 100% {
    border-color: var(--color-orange);
    box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.4);
  }
  50% {
    border-color: var(--color-orange);
    box-shadow: 0 0 0 8px rgba(255, 107, 53, 0);
  }
}

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

.notice-icon {
  font-size: 3rem;
  flex-shrink: 0;
}

.notice-text {
  flex: 1;
}

.notice-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--spacing-xs);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -0.02em;
}

.notice-subtitle {
  font-size: 1rem;
  color: var(--color-gray-lighter);
  line-height: 1.6;
  margin: 0;
}

.hero-content {
  max-width: var(--content-width);
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Profile Section */
.profile-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}

.profile-image-wrapper {
  width: 100%;
  max-width: 300px;
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: visible;
  position: relative;
  background: var(--color-gray-dark);
  padding: 4px;
}

.profile-tech-border {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(45deg, var(--color-blue), var(--color-green), var(--color-purple), var(--color-orange));
  background-size: 400% 400%;
  animation: gradient-rotate 3s ease infinite;
  z-index: -1;
}

@keyframes gradient-rotate {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 50%;
  background: var(--color-gray-dark);
}

/* Tech Badges */
.tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  justify-content: center;
}

.tech-badge {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  background: rgba(0, 113, 227, 0.2);
  border: 1px solid rgba(0, 113, 227, 0.3);
  color: var(--color-blue);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.05em;
}

/* Intro Section */
.intro-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.intro-header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.intro-label {
  font-size: 0.875rem;
  color: var(--color-green);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.intro-name {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-white);
  line-height: 1.1;
  margin-bottom: var(--spacing-xs);
  font-family: 'JetBrains Mono', monospace;
}

.code-symbol {
  color: var(--color-green);
  font-weight: 400;
}

.intro-title {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-gray-lighter);
  letter-spacing: -0.016em;
  margin-bottom: var(--spacing-md);
}

.intro-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.intro-text p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-gray-lighter);
  letter-spacing: -0.011em;
}

/* Code Snippet */
.code-snippet {
  background: var(--color-bg-code);
  border: 1px solid var(--color-border-code);
  border-radius: 8px;
  overflow: hidden;
  margin: var(--spacing-md) 0;
}

.code-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--color-border-code);
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gray);
}

.code-dot:nth-child(1) { background: #ff5f56; }
.code-dot:nth-child(2) { background: #ffbd2e; }
.code-dot:nth-child(3) { background: #27c93f; }

.code-filename {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--color-gray-light);
  font-family: 'JetBrains Mono', monospace;
}

.code-content {
  padding: var(--spacing-md);
  margin: 0;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-white);
}

.code-content code {
  display: block;
}

.code-keyword {
  color: #ff7b72;
}

.code-function {
  color: #d2a8ff;
}

.code-string {
  color: #a5d6ff;
}

/* Tech Stack */
.tech-stack-section {
  margin: var(--spacing-lg) 0;
}

.tech-stack-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  font-family: 'JetBrains Mono', monospace;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.tech-stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

.tech-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  transition: all 0.2s;
}

.tech-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-blue);
  transform: translateY(-2px);
}

.tech-icon {
  font-size: 1.25rem;
}

.tech-name {
  font-size: 0.875rem;
  color: var(--color-white);
  font-weight: 500;
  font-family: 'JetBrains Mono', monospace;
}

/* CTA Section */
.cta-section {
  margin-top: var(--spacing-md);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--color-blue);
  color: var(--color-white);
  text-decoration: none;
  border-radius: 8px;
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: -0.011em;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.4);
  font-family: 'Inter', sans-serif;
}

.cta-button:hover {
  background: var(--color-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.5);
}

.cta-button svg {
  transition: transform 0.3s;
}

.cta-button:hover svg {
  transform: translateX(4px);
}

/* Contact Section */
.contact-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  font-size: 1rem;
  color: var(--color-gray-lighter);
  flex-wrap: wrap;
}

.contact-link {
  color: var(--color-blue);
  text-decoration: none;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.contact-link:hover {
  color: var(--color-blue-hover);
  text-decoration: underline;
}

.contact-icon {
  font-size: 0.875rem;
}

.contact-separator {
  color: var(--color-gray);
}

.contact-location {
  color: var(--color-gray-lighter);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* Footer */
.footer {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  background: rgba(13, 17, 23, 0.5);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-text {
  font-size: 0.875rem;
  color: var(--color-gray);
  letter-spacing: -0.011em;
  font-family: 'JetBrains Mono', monospace;
}

.footer-code {
  color: var(--color-green);
}

.footer-var {
  color: var(--color-blue);
}

.footer-number {
  color: var(--color-orange);
}

/* Responsive */
@media (max-width: 968px) {
  body {
    background: var(--color-black);
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }

  .profile-section {
    order: -1;
  }

  .profile-image-wrapper {
    max-width: 250px;
    margin: 0 auto;
  }

  .intro-section {
    text-align: left;
  }

  .intro-name {
    font-size: 2.5rem;
  }

  .intro-title {
    font-size: 1.25rem;
  }

  .tech-stack-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .coming-soon-notice {
    margin-bottom: var(--spacing-lg);
  }

  .notice-content {
    flex-direction: column;
    text-align: center;
  }

  .notice-icon {
    font-size: 2.5rem;
  }

  .notice-title {
    font-size: 1.25rem;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .nav {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .intro-name {
    font-size: 2rem;
  }

  .intro-title {
    font-size: 1.125rem;
  }

  .intro-text p {
    font-size: 1rem;
  }

  .cta-button {
    width: 100%;
    justify-content: center;
    padding: var(--spacing-md);
  }

  .contact-section {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }

  .contact-separator {
    display: none;
  }

  .tech-stack-grid {
    grid-template-columns: 1fr;
  }

  .coming-soon-notice {
    padding: var(--spacing-md);
  }

  .notice-icon {
    font-size: 2rem;
  }

  .notice-title {
    font-size: 1.125rem;
  }

  .notice-subtitle {
    font-size: 0.875rem;
  }
}