:root {
  --color-bg: #0b0b0f;
  --color-surface: #12121a;
  --color-surface-elevated: #1a1a25;
  --color-text: #eeeef0;
  --color-text-secondary: #9090a0;
  --color-text-tertiary: #55556a;
  --color-gold: #c9a962;
  --color-gold-dim: #8a7340;
  --color-gold-glow: rgba(201, 169, 98, 0.12);
  --color-gold-glow-strong: rgba(201, 169, 98, 0.25);
  --color-border: #22222e;
  --color-border-hover: #c9a962;
  --color-dot: #c9a962;

  --font-mono: 'Space Mono', 'Courier New', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  --max-width: 1080px;
  --radius: 2px;

  --transition: 200ms cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 10%, rgba(201, 169, 98, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 90%, rgba(201, 169, 98, 0.04) 0%, transparent 50%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

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

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-gold);
  color: var(--color-bg);
  padding: 0.5rem 1rem;
  z-index: 10000;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

/* Focus Visible Styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
  border-radius: 2px;
}

.nav__logo:focus-visible,
.lang-toggle:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  background-color: rgba(11, 11, 15, 0.85);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav__logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  position: absolute;
  left: var(--space-md);
}

.nav__logo-dot {
  font-size: 0.5rem;
  display: inline-block;
  color: var(--color-gold);
  text-shadow: 0 0 8px var(--color-gold-glow-strong);
}

.nav__links {
  display: flex;
  gap: var(--space-md);
}

.nav__links a {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.nav__links a:hover {
  color: var(--color-gold);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width var(--transition);
}

.nav__links a:hover::after,
.nav__links a:focus-visible::after {
  width: 100%;
}

.nav__actions {
  position: absolute;
  right: var(--space-md);
}

.lang-toggle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border: 1px solid var(--color-border);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius);
  color: var(--color-text-secondary);
  transition: border-color var(--transition), color var(--transition);
}

.lang-toggle:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3xl) var(--space-md) var(--space-2xl);
  max-width: var(--max-width);
  margin: 0 auto;
  gap: var(--space-xl);
}

.hero__content {
  max-width: 720px;
}

.hero__tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.hero__description {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 600px;
}

.hero__cta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero__visual {
  flex-shrink: 0;
  width: 600px;
  height: 800px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#dot-canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

.dot-grid {
  width: 220px;
  height: 220px;
  background-image: radial-gradient(circle, var(--color-gold) 1px, transparent 1px);
  background-size: 20px 20px;
  animation: dotPulse 6s ease-in-out infinite;
  position: relative;
}

.dot-grid::after {
  content: '';
  position: absolute;
  inset: -30px;
  background: radial-gradient(circle, var(--color-gold-glow) 0%, transparent 70%);
  pointer-events: none;
}

@keyframes dotPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.9; }
}

.btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.btn:hover {
  border-color: var(--color-gold-dim);
}

.btn--primary {
  background: var(--color-gold);
  color: var(--color-bg);
  border-color: var(--color-gold);
  font-weight: 700;
}

.btn--primary:hover {
  background: #d4b872;
  border-color: #d4b872;
}

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

.btn--secondary:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.section-header {
  margin-bottom: var(--space-xl);
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold);
  display: block;
  margin-bottom: var(--space-xs);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.projects,
.stack,
.about,
.contact {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-md);
  content-visibility: auto;
  contain-intrinsic-size: 0 600px;
}

.projects {
  border-top: 1px solid var(--color-border);
}

.project-card {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  transition: border-color var(--transition), background-color var(--transition);
  background: var(--color-surface);
}

.project-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  border-radius: var(--radius) 0 0 var(--radius);
  transition: background var(--transition);
}

.project-card:hover {
  border-color: var(--color-gold-dim);
  background-color: var(--color-surface-elevated);
}

.project-card:hover::before {
  background: var(--color-gold);
}

.project-card--linkable {
  cursor: pointer;
}

.project-card__stretch-link {
  position: absolute;
  inset: 0;
  z-index: 1;
  text-decoration: none;
}

.project-card__stretch-link::after {
  content: '';
  position: absolute;
  inset: 0;
}

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.project-card__header time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.05em;
}

.project-card__links {
  display: flex;
  gap: var(--space-sm);
}

.project-card__links a,
.project-card__live,
.project-card__confidential {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  position: relative;
  z-index: 2;
  color: var(--color-text-secondary);
  letter-spacing: 0.03em;
  padding: 0.125rem 0.375rem;
  transition: color var(--transition), background-color var(--transition);
  border-radius: 1px;
}

.project-card:hover .project-card__live,
.project-card:hover .project-card__confidential {
  color: var(--color-bg);
  background-color: var(--color-gold);
}

.project-card__links a:hover {
  color: var(--color-gold);
}

.project-card__confidential {
  opacity: 0.5;
  font-style: italic;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.project-card:hover .project-card__confidential {
  opacity: 1;
}

.project-card__body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
  position: relative;
  z-index: 0;
  color: var(--color-text);
}

.project-card__body p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.65;
  position: relative;
  z-index: 0;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-md);
}

.project-card__tech span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-gold-dim);
  transition: border-color var(--transition), color var(--transition);
}

.project-card:hover .project-card__tech span {
  border-color: var(--color-gold-dim);
  color: var(--color-gold);
}

.stack {
  border-top: 1px solid var(--color-border);
}

.stack__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.stack__category h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.stack__category--learning h3 {
  color: var(--color-gold-dim);
}

.stack__category li {
  font-size: 0.9375rem;
  padding: 0.25rem 0;
  color: var(--color-text);
}

.stack__category--learning li {
  color: var(--color-text-secondary);
  font-style: italic;
}

.about {
  border-top: 1px solid var(--color-border);
}

.about__content {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.about__photo-placeholder {
  width: 120px;
  height: 120px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gold);
  background: var(--color-surface);
  position: relative;
}

.about__photo-placeholder::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--color-gold-glow) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.about__text p {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.about__authority {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
}

.about__authority-item h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
}

.about__authority-item li {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  padding: 0.25rem 0;
}

.cert-link {
  color: var(--color-text-secondary);
  padding: 0.125rem 0.375rem;
  border-radius: 1px;
  transition: color var(--transition), background-color var(--transition);
  text-decoration: none;
  display: inline-block;
}

.cert-link:hover {
  color: var(--color-bg);
  background-color: var(--color-gold);
}

.about__authority-item li strong {
  color: var(--color-text);
}

.contact {
  border-top: 1px solid var(--color-border);
}

.contact__content {
  max-width: 480px;
}

.contact__content > p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.contact__email {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: border-color var(--transition);
}

.contact__email:hover {
  border-color: var(--color-gold-dim);
}

.contact__email-text {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.btn--copy {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
  background: var(--color-bg);
  color: var(--color-text-secondary);
}

.btn--copy:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.btn--copy.copied {
  background: var(--color-gold);
  color: var(--color-bg);
  border-color: var(--color-gold);
}

.contact__socials {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.contact__socials a {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.03em;
  transition: color var(--transition);
}

.contact__socials a:hover {
  color: var(--color-gold);
}

.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer p {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.05em;
}

.project-card[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color var(--transition), background-color var(--transition);
}

.project-card[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .hero {
    flex-direction: column;
    min-height: auto;
    padding-top: calc(var(--space-3xl) + var(--space-md));
    padding-bottom: var(--space-xl);
  }

  .hero__content {
    max-width: 100%;
  }

  .hero__description {
    max-width: 100%;
  }

  .hero__visual {
    width: 320px;
    height: 420px;
  }

  .about__content {
    grid-template-columns: 1fr;
  }

  .about__photo {
    display: flex;
    justify-content: flex-start;
  }

  .about__authority {
    grid-template-columns: 1fr;
  }

  .stack__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  .hero__cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .contact__email {
    flex-direction: column;
    align-items: stretch;
  }

  .stack__grid {
    grid-template-columns: 1fr;
  }
}

/* Reduced Motion for Accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .dot-grid {
    animation: none !important;
  }
}