:root {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-tertiary: #141414;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-tertiary: #606060;
  --border-color: #1a1a1a;
  --accent: #ffffff;
  --transition-speed: 0.3s;
  --transition-curve: cubic-bezier(0.4, 0, 0.2, 1);
  --spacing-unit: clamp(1rem, 2vw, 2rem);
  --max-width: min(90vw, 1400px);
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-mono);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  min-height: 100vh;
  font-weight: 400;
  position: relative;
  cursor: none;
}

* {
  cursor: none !important;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
  background-image: 
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255,255,255,0.03) 2px, rgba(255,255,255,0.03) 4px),
    repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(255,255,255,0.03) 2px, rgba(255,255,255,0.03) 4px);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-tertiary);
  transition: background var(--transition-speed);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--text-tertiary) var(--bg-primary);
}

#background-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

main {
  position: relative;
  z-index: 1;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-speed) var(--transition-curve);
}

footer {
  position: relative;
  z-index: 1;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: calc(var(--spacing-unit) * 2) 0;
  text-align: center;
}

#cursor {
  position: fixed;
  width: 20px;
  height: 20px;
  border: 1.5px solid var(--text-primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
  transition: transform 0.15s ease, opacity 0.3s ease, width 0.4s ease, height 0.4s ease, border 0.4s ease;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}

#cursor.marker-mode {
  width: 16px;
  height: 16px;
  border: none;
  background-image: url('/images/marker_icon.svg');
  opacity: 0.9;
  border-radius: 0;
}

#cursor-dot {
  position: fixed;
  width: 4px;
  height: 4px;
  background: var(--text-primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10001;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
}

#cursor.marker-mode + #cursor-dot {
  opacity: 0;
}

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

.container {
  width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-unit);
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-speed) var(--transition-curve);
}

header.scrolled {
  background: rgba(0, 0, 0, 0.95);
  border-bottom-color: var(--text-tertiary);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-unit) 0;
  min-height: 60px;
}

.logo {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: opacity var(--transition-speed), transform var(--transition-speed);
  cursor: pointer;
}

.logo:hover {
  opacity: 0.7;
  transform: translateX(2px);
}

.account-link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  transition: opacity var(--transition-speed), transform var(--transition-speed);
  text-decoration: none;
  color: var(--text-primary);
}

.account-link:hover {
  opacity: 0.7;
  transform: translateX(2px);
}

.account-icon {
  width: clamp(1.5rem, 2.5vw, 2rem);
  height: clamp(1.5rem, 2.5vw, 2rem);
  stroke-width: 1.5;
}

main {
  padding-top: 60px;
}

section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--spacing-unit) * 2) 0;
  position: relative;
}

.section-content {
  width: 100%;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  text-align: center;
}

.hero-title {
  font-size: clamp(2rem, 8vw, 6rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: calc(var(--spacing-unit) * 0.5);
  line-height: 1.1;
  background: linear-gradient(180deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  transform: translateY(30px);
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: calc(var(--spacing-unit) * 2);
  letter-spacing: 0.05em;
  font-weight: 300;
  opacity: 0;
}

.hero-description {
  font-size: clamp(0.875rem, 1.5vw, 1rem);
  color: var(--text-tertiary);
  max-width: 60ch;
  margin: 0 auto calc(var(--spacing-unit) * 3);
  line-height: 1.8;
  font-weight: 300;
  opacity: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: calc(var(--spacing-unit) * 1.5);
  margin-top: calc(var(--spacing-unit) * 2);
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: calc(var(--spacing-unit) * 1.5);
  transition: all var(--transition-speed) var(--transition-curve);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--text-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-speed) var(--transition-curve);
}

.card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.03), transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-speed);
  pointer-events: none;
}

.card:hover {
  border-color: var(--text-tertiary);
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover::after {
  opacity: 1;
}

.card-title {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
  letter-spacing: 0.05em;
  font-weight: 500;
  transition: transform var(--transition-speed);
}

.card:hover .card-title {
  transform: translateX(4px);
}

.card-text {
  color: var(--text-secondary);
  font-size: clamp(0.875rem, 1.5vw, 1rem);
  line-height: 1.7;
}

.section-title {
  font-size: clamp(1.5rem, 4vw, 3rem);
  font-weight: 500;
  margin-bottom: calc(var(--spacing-unit) * 2);
  letter-spacing: 0.05em;
  text-align: center;
  position: relative;
  display: inline-block;
  width: 100%;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60px;
  height: 1px;
  background: var(--text-primary);
  transition: transform 0.6s var(--transition-curve);
}

.visible .section-title::after {
  transform: translateX(-50%) scaleX(1);
}

.bio-content {
  max-width: 80ch;
  margin: 0 auto;
}

.bio-text {
  font-size: clamp(0.875rem, 1.5vw, 1rem);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  font-weight: 300;
}

.interactive-text {
  cursor: default;
}

.interactive-text .word {
  display: inline-block;
  margin-right: 0.3em;
  transition: opacity 0.3s ease;
  opacity: 1;
  color: var(--text-secondary);
  position: relative;
}

.interactive-text:hover .word {
  opacity: 0.3;
}

.interactive-text .word.highlight {
  position: relative;
}

.interactive-text .word.highlight::after {
  content: '';
  position: absolute;
  left: -2px;
  right: -2px;
  top: 50%;
  height: 60%;
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-50%) scaleX(0);
  transform-origin: left;
  z-index: -1;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.interactive-text:hover .word.highlight {
  opacity: 1;
  color: var(--text-primary);
}

.timeline {
  position: relative;
  padding-left: clamp(2.5rem, 5vw, 3.5rem);
  margin-top: calc(var(--spacing-unit) * 2);
  max-width: min(100%, 800px);
}

.timeline-item {
  position: relative;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
  padding-left: clamp(1.75rem, 3.5vw, 2.5rem);
  opacity: 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: clamp(0.25rem, 0.5vw, 0.375rem);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: clamp(-2.5rem, -5vw, -3.5rem);
  top: 0.125rem;
  width: 11px;
  height: 11px;
  background: var(--bg-primary);
  border: 2px solid var(--text-primary);
  border-radius: 50%;
  transform: translate(50%, 0);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2;
  box-sizing: border-box;
}

.timeline-item::after {
  content: '';
  position: absolute;
  left: clamp(-2.5rem, -5vw, -3.5rem);
  top: 0.125rem;
  width: 11px;
  height: 11px;
  background: var(--text-primary);
  border-radius: 50%;
  transform: translate(50%, 0) scale(0);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1;
  opacity: 0.15;
  box-sizing: border-box;
}

.timeline-item:hover {
  transform: translateX(clamp(6px, 1vw, 10px));
}

.timeline-item:hover::before {
  background: var(--text-primary);
  border-color: var(--text-primary);
  box-shadow: 0 0 0 clamp(3px, 0.5vw, 5px) rgba(255, 255, 255, 0.1);
}

.timeline-item:hover::after {
  transform: translate(50%, 0) scale(3);
}

.timeline-item:hover .timeline-year {
  color: var(--text-primary);
  transform: translateX(clamp(2px, 0.3vw, 3px));
}

.timeline-item:hover .timeline-content {
  color: var(--text-primary);
}

.timeline-year {
  font-size: clamp(0.6875rem, 1.2vw, 0.8125rem);
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
  line-height: 1.2;
}

.timeline-content {
  font-size: clamp(0.875rem, 1.5vw, 1rem);
  color: var(--text-secondary);
  line-height: 1.7;
  font-weight: 300;
  transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 60ch;
  display: block;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: calc(var(--spacing-unit) * 1.5);
  margin-top: calc(var(--spacing-unit) * 2);
}

.skill-category {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: calc(var(--spacing-unit) * 1.5);
  transition: all var(--transition-speed) var(--transition-curve);
  position: relative;
  overflow: hidden;
}

.skill-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: var(--text-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-speed) var(--transition-curve);
}

.skill-category::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
  z-index: 0;
}

.skill-category[data-category="development"]::after {
  background: transparent;
}

.skill-category[data-category="design"]::after {
  background: transparent;
}

.skill-category:hover {
  border-color: var(--text-tertiary);
  transform: translateY(-2px);
}

.skill-category:hover::before {
  transform: scaleY(1);
}

.skill-category[data-category="development"]:hover::after {
  opacity: 1;
}

.skill-category[data-category="design"]:hover::after {
  opacity: 1;
}

.skill-category[data-category="production"]:hover::after {
  opacity: 1;
}

.skill-category > * {
  position: relative;
  z-index: 1;
}

.skill-category-title {
  font-size: clamp(1rem, 2vw, 1.125rem);
  margin-bottom: calc(var(--spacing-unit) * 0.75);
  letter-spacing: 0.05em;
  font-weight: 500;
}

.skill-list {
  list-style: none;
}

.skill-item {
  font-size: clamp(0.875rem, 1.5vw, 1rem);
  color: var(--text-secondary);
  padding: 0.5rem 0;
  border-bottom: none;
  transition: all var(--transition-speed);
  font-weight: 300;
  position: relative;
  padding-left: 0;
}

.skill-item::before {
  content: '→';
  position: absolute;
  left: -1rem;
  opacity: 0;
  transition: all var(--transition-speed);
}

.skill-item:hover {
  color: var(--text-primary);
  padding-left: 1.5rem;
  transform: translateX(2px);
}

.skill-item:hover::before {
  opacity: 1;
  left: 0;
}

.interests-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: calc(var(--spacing-unit) * 1.5);
  margin-top: calc(var(--spacing-unit) * 2);
}

.interest-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: calc(var(--spacing-unit) * 1.5);
  transition: all var(--transition-speed) var(--transition-curve);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.interest-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.03), transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-speed);
  pointer-events: none;
}

.interest-card:hover {
  border-color: var(--text-tertiary);
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

.interest-card:hover::after {
  opacity: 1;
}

.interest-title {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
  letter-spacing: 0.05em;
  font-weight: 500;
  transition: transform var(--transition-speed);
}

.interest-card:hover .interest-title {
  transform: translateX(4px);
}

.interest-description {
  font-size: clamp(0.875rem, 1.5vw, 1rem);
  color: var(--text-secondary);
  line-height: 1.7;
  font-weight: 300;
}

footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: calc(var(--spacing-unit) * 2) 0;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--spacing-unit) * 1.5);
}

.social-links {
  display: flex;
  gap: calc(var(--spacing-unit) * 1.5);
  align-items: center;
}

.footer-links {
  display: flex;
  gap: calc(var(--spacing-unit) * 0.5);
  align-items: center;
  font-size: clamp(0.75rem, 1.5vw, 0.875rem);
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-speed) var(--transition-curve);
  letter-spacing: 0.05em;
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-separator {
  color: var(--text-tertiary);
  user-select: none;
  pointer-events: none;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-secondary);
  transition: all var(--transition-speed) var(--transition-curve);
  position: relative;
}

.social-link svg {
  width: 20px;
  height: 20px;
  transition: all var(--transition-speed) var(--transition-curve);
}

.social-link:hover {
  color: var(--text-primary);
  transform: translateY(-2px);
}

.social-link:hover svg {
  transform: scale(1.1);
}

.language-switcher {
  display: flex;
  gap: calc(var(--spacing-unit) * 0.3);
  align-items: center;
  font-size: clamp(0.75rem, 1.5vw, 0.875rem);
  letter-spacing: 0.05em;
}

.language-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-speed) var(--transition-curve);
  cursor: pointer;
  text-transform: lowercase;
}

.language-link:hover {
  color: var(--text-primary);
}

.language-link.active {
  color: var(--text-primary);
}

.language-separator {
  color: var(--text-tertiary);
  user-select: none;
  pointer-events: none;
}

.footer-copyright {
  font-size: clamp(0.75rem, 1.5vw, 0.875rem);
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
}

.legal-page {
  min-height: 100vh;
  padding: calc(var(--spacing-unit) * 8) 0 calc(var(--spacing-unit) * 4);
}

.legal-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 400;
  margin-bottom: calc(var(--spacing-unit) * 3);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.legal-section {
  margin-bottom: calc(var(--spacing-unit) * 3);
  padding-bottom: calc(var(--spacing-unit) * 2);
  border-bottom: 1px solid var(--border-color);
}

.legal-section:last-of-type {
  border-bottom: none;
}

.legal-section-title {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 500;
  margin-bottom: calc(var(--spacing-unit) * 1);
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.legal-subsection {
  margin-top: calc(var(--spacing-unit) * 1.5);
  padding-left: calc(var(--spacing-unit) * 1);
  border-left: 2px solid var(--border-color);
}

.legal-subsection-title {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 500;
  margin-bottom: calc(var(--spacing-unit) * 0.75);
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}

.legal-text {
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: calc(var(--spacing-unit) * 1);
  letter-spacing: 0.01em;
  font-weight: 300;
}

.legal-text:last-child {
  margin-bottom: 0;
}

.legal-footer {
  margin-top: calc(var(--spacing-unit) * 4);
  padding-top: calc(var(--spacing-unit) * 2);
  border-top: 1px solid var(--border-color);
}

.legal-updated {
  font-size: clamp(0.8rem, 1.8vw, 0.95rem);
  color: var(--text-tertiary);
  font-style: italic;
  letter-spacing: 0.02em;
}

.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.error-code {
  font-size: clamp(4rem, 15vw, 10rem);
  font-weight: 400;
  line-height: 1;
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.error-message {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.btn {
  display: inline-block;
  padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
  background: transparent;
  color: var(--text-primary);
  text-decoration: none;
  border: 1px solid var(--text-primary);
  font-family: var(--font-mono);
  font-size: clamp(0.875rem, 1.5vw, 1rem);
  letter-spacing: 0.05em;
  transition: all var(--transition-speed) var(--transition-curve);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--text-primary);
  transform: translateX(-100%);
  transition: transform var(--transition-speed) var(--transition-curve);
  z-index: -1;
}

.btn:hover {
  color: var(--bg-primary);
}

.btn:hover::before {
  transform: translateX(0);
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 0.5);
  }

  .timeline {
    padding-left: clamp(1.5rem, 5vw, 2rem);
    max-width: 100%;
  }

  .timeline::before {
    width: 1.5px;
  }

  .timeline-item {
    padding-left: clamp(1rem, 3vw, 1.5rem);
    margin-bottom: clamp(1.5rem, 5vw, 2rem);
  }

  .timeline-item::before {
    left: clamp(-1.5rem, -5vw, -2rem);
    width: 8px;
    height: 8px;
  }

  .timeline-item::after {
    left: clamp(-1.5rem, -5vw, -2rem);
    width: 8px;
    height: 8px;
  }

  .timeline-item:hover {
    transform: translateX(clamp(2px, 0.3vw, 4px));
  }

  .timeline-year {
    font-size: clamp(0.7rem, 2.5vw, 0.8rem);
  }

  .timeline-content {
    font-size: clamp(0.8rem, 3vw, 0.9rem);
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .timeline {
    padding-left: clamp(2rem, 3.5vw, 2.5rem);
  }

  .timeline-item {
    padding-left: clamp(1.25rem, 2.5vw, 1.75rem);
  }

  .timeline-item::before,
  .timeline-item::after {
    left: clamp(-2rem, -3.5vw, -2.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .timeline-item::before,
  .timeline-item::after {
    transition: none !important;
  }
}