/* ============================================
   Quantum Dark Mode - Portfolio Stylesheet
   Joe Gibbs | Quantum Research Scientist
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
  /* Colors */
  --color-void: #0a0e14;
  --color-void-light: #141b24;
  --color-void-lighter: #1e2832;
  --color-starlight: #e0e6ed;
  --color-starlight-dim: #8b9cad;
  --color-cyan: #00f2ff;
  --color-purple: #bd00ff;
  --color-cyan-glow: rgba(0, 242, 255, 0.3);
  --color-purple-glow: rgba(189, 0, 255, 0.3);

  /* Typography */
  --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: Georgia, 'Times New Roman', serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --border-radius: 8px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-med: 300ms ease;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-void);
  color: var(--color-starlight);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Canvas Background */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: var(--space-md);
  color: var(--color-cyan);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-sm);
  max-width: 65ch;
}

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

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

/* Layout Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: linear-gradient(to bottom, var(--color-void) 0%, transparent 100%);
  padding: var(--space-sm) 0;
}

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

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-starlight);
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--color-starlight-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-xs) 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
  transition: width var(--transition-med);
}

.nav-links a:hover {
  color: var(--color-starlight);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Nav Social Icons */
.nav-social {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  margin-left: var(--space-md);
}

.nav-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--color-starlight-dim);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav-social a:hover {
  color: var(--color-cyan);
  transform: scale(1.1);
}

.nav-social svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Header / Hero Section */
header {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--space-xl);
}

.hero-content {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.hero-photo {
  flex-shrink: 0;
  position: relative;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  padding: 4px;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-purple));
}

.hero-photo-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--color-void);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.15) translate(-1%, 0%);
  }

.photo-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-void-light) 0%, var(--color-void-lighter) 100%);
  border: 3px solid var(--color-void-lighter);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.photo-placeholder::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  padding: 2px;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-purple));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.photo-placeholder span {
  font-family: var(--font-heading);
  font-size: 3rem;
  color: var(--color-starlight-dim);
}

.hero-text .title {
  font-size: 1.1rem;
  color: var(--color-cyan);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-xs);
  font-family: var(--font-heading);
}

.hero-text h1 {
  margin-bottom: var(--space-sm);
}

.hero-text .subtitle {
  font-size: 1.25rem;
  color: var(--color-starlight-dim);
  font-style: italic;
}

/* Sections */
section {
  padding: var(--space-xl) 0;
}

/* About Section */
#about .bio {
  font-size: 1.1rem;
  max-width: 75ch;
  white-space: pre-line;
}

/* Research Cards */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.research-card {
  background: var(--color-void-light);
  border: 1px solid var(--color-void-lighter);
  border-radius: var(--border-radius);
  padding: var(--space-md);
  transition: all var(--transition-med);
  position: relative;
  overflow: hidden;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
  opacity: 0;
  transition: opacity var(--transition-med);
}

.research-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-void-lighter);
  box-shadow: 0 10px 40px rgba(0, 242, 255, 0.1);
}

.research-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 90px;
  height: 90px;
  margin-bottom: var(--space-sm);
  position: relative;
}

/* CSS-based Icons */
.icon-wave {
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 60'%3E%3Cpath d='M5 30 Q15 10, 30 30 T55 30' fill='none' stroke='%23fff' stroke-width='3'/%3E%3Ccircle cx='30' cy='30' r='8' fill='none' stroke='%23fff' stroke-width='2'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 60'%3E%3Cpath d='M5 30 Q15 10, 30 30 T55 30' fill='none' stroke='%23fff' stroke-width='3'/%3E%3Ccircle cx='30' cy='30' r='8' fill='none' stroke='%23fff' stroke-width='2'/%3E%3C/svg%3E") center/contain no-repeat;
}

.icon-gate {
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 60'%3E%3Crect x='10' y='10' width='15' height='15' fill='none' stroke='%23fff' stroke-width='2'/%3E%3Crect x='35' y='10' width='15' height='15' fill='none' stroke='%23fff' stroke-width='2'/%3E%3Crect x='10' y='35' width='15' height='15' fill='none' stroke='%23fff' stroke-width='2'/%3E%3Crect x='35' y='35' width='15' height='15' fill='none' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='25' y1='17' x2='35' y2='17' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='25' y1='42' x2='35' y2='42' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='17' y1='25' x2='17' y2='35' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='42' y1='25' x2='42' y2='35' stroke='%23fff' stroke-width='2'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 60'%3E%3Crect x='10' y='10' width='15' height='15' fill='none' stroke='%23fff' stroke-width='2'/%3E%3Crect x='35' y='10' width='15' height='15' fill='none' stroke='%23fff' stroke-width='2'/%3E%3Crect x='10' y='35' width='15' height='15' fill='none' stroke='%23fff' stroke-width='2'/%3E%3Crect x='35' y='35' width='15' height='15' fill='none' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='25' y1='17' x2='35' y2='17' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='25' y1='42' x2='35' y2='42' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='17' y1='25' x2='17' y2='35' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='42' y1='25' x2='42' y2='35' stroke='%23fff' stroke-width='2'/%3E%3C/svg%3E") center/contain no-repeat;
}

.icon-network {
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 60'%3E%3Ccircle cx='15' cy='15' r='5' fill='%23fff'/%3E%3Ccircle cx='45' cy='15' r='5' fill='%23fff'/%3E%3Ccircle cx='15' cy='45' r='5' fill='%23fff'/%3E%3Ccircle cx='45' cy='45' r='5' fill='%23fff'/%3E%3Ccircle cx='30' cy='30' r='6' fill='%23fff'/%3E%3Cline x1='15' y1='15' x2='30' y2='30' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='45' y1='15' x2='30' y2='30' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='15' y1='45' x2='30' y2='30' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='45' y1='45' x2='30' y2='30' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='15' y1='15' x2='45' y2='15' stroke='%23fff' stroke-width='1.5'/%3E%3Cline x1='15' y1='45' x2='45' y2='45' stroke='%23fff' stroke-width='1.5'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 60'%3E%3Ccircle cx='15' cy='15' r='5' fill='%23fff'/%3E%3Ccircle cx='45' cy='15' r='5' fill='%23fff'/%3E%3Ccircle cx='15' cy='45' r='5' fill='%23fff'/%3E%3Ccircle cx='45' cy='45' r='5' fill='%23fff'/%3E%3Ccircle cx='30' cy='30' r='6' fill='%23fff'/%3E%3Cline x1='15' y1='15' x2='30' y2='30' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='45' y1='15' x2='30' y2='30' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='15' y1='45' x2='30' y2='30' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='45' y1='45' x2='30' y2='30' stroke='%23fff' stroke-width='2'/%3E%3Cline x1='15' y1='15' x2='45' y2='15' stroke='%23fff' stroke-width='1.5'/%3E%3Cline x1='15' y1='45' x2='45' y2='45' stroke='%23fff' stroke-width='1.5'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* Animated Bloch Sphere Icon */
.bloch-sphere-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 90px;
  height: 90px;
}

.bloch-sphere-svg {
  width: 100%;
  height: 100%;
}

.research-card h3 {
  color: var(--color-starlight);
}

.research-card p {
  color: var(--color-starlight-dim);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Skills Section */
.skills-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.skill-category {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.skill-category-title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-starlight-dim);
  min-width: 120px;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.skill-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.9rem;
  background: var(--color-void-light);
  border: 1px solid var(--color-void-lighter);
  border-radius: 20px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--color-starlight);
  transition: all var(--transition-fast);
}

.skill-pill:hover {
  border-color: var(--color-cyan);
  box-shadow: 0 0 15px var(--color-cyan-glow);
}

.skill-pill .level {
  font-size: 0.7rem;
  color: var(--color-cyan);
  opacity: 0.8;
}

/* Publications Section */
.publications-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.publication-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-void-lighter);
  transition: all var(--transition-fast);
}

.publication-item:hover {
  padding-left: var(--space-sm);
  background: var(--color-void-light);
  margin: 0 calc(-1 * var(--space-sm));
  padding-right: var(--space-sm);
}

.publication-year {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-cyan);
  font-weight: 600;
}

.publication-content h4 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-starlight);
  margin-bottom: 0.25rem;
}

.publication-content h4 a {
  color: inherit;
}

.publication-content h4 a:hover {
  color: var(--color-cyan);
}

.publication-authors {
  font-size: 0.9rem;
  color: var(--color-starlight-dim);
  white-space: nowrap;
}

.publication-authors .author-self {
  font-weight: 700;
  text-decoration: underline;
  color: var(--color-starlight);
}

.publication-journal {
  font-size: 0.85rem;
  color: var(--color-cyan);
  font-style: italic;
  margin-top: 0.25rem;
}

/* Selected Talks Section */
.talks-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.talk-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-void-lighter);
  transition: all var(--transition-fast);
}

.talk-item:hover {
  padding-left: var(--space-sm);
  background: var(--color-void-light);
  margin: 0 calc(-1 * var(--space-sm));
  padding-right: var(--space-sm);
}

.talk-year {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-cyan);
  font-weight: 600;
}

.talk-content h4 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-starlight);
  margin-bottom: 0.25rem;
}

.talk-event {
  font-size: 0.9rem;
  color: var(--color-starlight-dim);
}

.talk-invited {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-void);
  background: var(--color-cyan);
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.talk-location {
  font-size: 0.85rem;
  color: var(--color-cyan);
  font-style: italic;
  margin-top: 0.25rem;
}

/* Software Showcase Section */
.software-showcase {
  margin-top: var(--space-md);
}

.software-card {
  background: var(--color-void-light);
  border: 1px solid var(--color-void-lighter);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-med);
}

.software-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
}

.software-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 40px rgba(0, 242, 255, 0.15);
}

.software-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.software-title-group h3 {
  font-size: 1.75rem;
  color: var(--color-starlight);
  margin-bottom: var(--space-xs);
}

.software-tagline {
  display: block;
  font-size: 1rem;
  color: var(--color-cyan);
  font-style: italic;
}

.software-github-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.6rem 1.2rem;
  background: transparent;
  border: 1px solid var(--color-cyan);
  border-radius: var(--border-radius);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--color-cyan);
  transition: all var(--transition-fast);
}

.software-github-link:hover {
  background: var(--color-cyan);
  color: var(--color-void);
}

.software-github-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.software-description {
  font-size: 1.1rem;
  color: var(--color-starlight);
  max-width: 80ch;
  margin-bottom: var(--space-md);
}

.software-highlights {
  margin-bottom: var(--space-md);
}

.software-highlights h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-starlight-dim);
  margin-bottom: var(--space-sm);
}

.software-highlights ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xs);
}

.software-highlights li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--color-starlight);
  font-size: 0.95rem;
}

.software-highlights li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-cyan);
}

.software-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-void-lighter);
}

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

.software-stats .stat {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--color-starlight-dim);
}

.software-stats .stat strong {
  color: var(--color-cyan);
}

.software-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.software-tags .tag {
  padding: 0.3rem 0.7rem;
  background: var(--color-void);
  border: 1px solid var(--color-void-lighter);
  border-radius: 20px;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--color-starlight-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Footer */
footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-void-lighter);
  margin-top: var(--space-xl);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--color-starlight-dim);
  transition: color var(--transition-fast);
}

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

.footer-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-starlight-dim);
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--color-starlight);
  transition: all var(--transition-fast);
}

/* Responsive Design */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-void);
    padding: var(--space-md);
    gap: var(--space-sm);
    transform: translateY(-20px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-med);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-social {
    margin-left: auto;
    margin-right: var(--space-sm);
    gap: var(--space-xs);
  }

  .nav-social svg {
    width: 16px;
    height: 16px;
  }

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

  .hero-text .subtitle {
    max-width: 100%;
  }

  .hero-photo {
    width: 140px;
    height: 140px;
  }

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

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

  .publication-item {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

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

  .software-card {
    padding: var(--space-md);
  }

  .software-header {
    flex-direction: column;
  }

  .software-github-link {
    width: 100%;
    justify-content: center;
  }

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

/* Animation for page load */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content,
section {
  animation: fadeInUp 0.6s ease forwards;
}

section {
  animation-delay: 0.2s;
  opacity: 0;
}

section:nth-child(2) { animation-delay: 0.3s; }
section:nth-child(3) { animation-delay: 0.4s; }
section:nth-child(4) { animation-delay: 0.5s; }