:root {
  --bg-primary: #0A0E14;
  --bg-surface: #111822;
  --bg-surface-alt: #1A2332;
  --text-primary: #E8EDF2;
  --text-secondary: #8A97A8;
  --accent: #4ADE80;
  --accent-alt: #FBBF24;
  --border: #1E2A3A;
  --font-display: 'Space Grotesk', 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;
  --font-body: 'Inter', 'IBM Plex Sans', system-ui, sans-serif;
  --space-unit: 24px;
  --section-padding: clamp(4rem, 10vw, 8rem) clamp(1.5rem, 5vw, 4rem);
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* Progress bar */
#portcv-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--accent);
  z-index: 1000;
  transition: width 0.2s ease;
}

/* Back to top */
#back-to-top {
  position: fixed;
  left: 20px;
  bottom: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s, border-color 0.3s;
  z-index: 999;
}
#back-to-top.visible {
  opacity: 1;
  visibility: visible;
}
#back-to-top:hover {
  border-color: var(--accent);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-shell {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-mark {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a:focus {
  color: var(--accent);
}

.nav-resume-item a {
  border: 1px solid var(--accent);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  color: var(--accent);
}

.nav-resume-item a:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 4px 0;
  transition: transform 0.3s;
}

/* Hero */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding: var(--section-padding);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 60% 40%;
  gap: 4rem;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.hero-status {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  letter-spacing: 0.08em;
}

.hero-statement {
  font-size: 1.25rem;
  max-width: 45ch;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
  padding: 0.75rem 2rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: box-shadow var(--transition-fast);
}

.btn-primary:hover {
  box-shadow: 0 0 20px rgba(74, 222, 128, 0.4);
}

.btn-secondary {
  color: var(--text-primary);
  text-decoration: none;
  font-family: var(--font-mono);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.25rem;
  transition: border-color var(--transition-fast);
}

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

.hero-aside {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.profile-frame {
  border: 1px solid var(--border);
  padding: 1rem;
  position: relative;
  background: var(--bg-surface);
}

.profile-frame img {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 4px;
  display: block;
  margin: 0 auto;
}

.profile-frame figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-proof {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
}

.proof-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.proof-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
}

.proof-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--border);
  animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Sections */
.section-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 3rem;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* About */
.about-section {
  padding: var(--section-padding);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 60% 40%;
  gap: 4rem;
  max-width: 1400px;
  margin: 0 auto;
}

.about-narrative p {
  margin-bottom: 1.5rem;
  max-width: 65ch;
}

.principles-list {
  list-style: none;
  margin-top: 2rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.principles-list li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.about-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 2rem;
}

.quick-facts {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.quick-facts dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
}

.quick-facts dd {
  font-size: 0.9rem;
  color: var(--text-primary);
}

/* Skills */
.skills-section {
  padding: var(--section-padding);
  border-bottom: 1px solid var(--border);
}

.terminal-window {
  max-width: 1400px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-surface-alt);
  border-bottom: 1px solid var(--border);
}

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

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

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-left: 0.5rem;
}

.terminal-body {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  padding: 2rem;
}

.skill-category h3 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.skill-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-list li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.skill-list li:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* Experience */
.experience-section {
  padding: var(--section-padding);
  border-bottom: 1px solid var(--border);
}

.timeline {
  list-style: none;
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 3rem;
}

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

.timeline-marker {
  position: absolute;
  left: -2.4rem;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  background: var(--bg-primary);
  border: 2px solid var(--border);
  border-radius: 2px;
}

.timeline-item:first-child .timeline-marker {
  border-color: var(--accent);
  background: var(--accent);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.timeline-content h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.company {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.context {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.timeline-content ul {
  list-style: disc;
  padding-left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Projects */
.projects-section {
  padding: var(--section-padding);
  border-bottom: 1px solid var(--border);
}

.featured-project {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 3rem;
}

.project-details h3 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.project-date {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.project-description {
  margin-bottom: 1.5rem;
}

.project-details h4 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.feature-list {
  list-style: none;
  margin-bottom: 1.5rem;
}

.feature-list li {
  padding: 0.25rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.tech-stack {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-stack li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
}

.project-deployment {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.project-link {
  display: inline-block;
  color: var(--accent);
  font-family: var(--font-mono);
  text-decoration: none;
  border: 1px solid var(--accent);
  padding: 0.5rem 1.5rem;
  border-radius: 4px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.project-link:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

.project-diagram {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  position: relative;
}

.diagram-node {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  background: var(--bg-surface-alt);
  position: relative;
}

.diagram-node::after {
  content: '';
  position: absolute;
  width: 1px;
  height: 2rem;
  background: var(--border);
  bottom: -2rem;
  left: 50%;
}

.diagram-node:last-child::after {
  display: none;
}

.node-client {
  border-color: var(--accent);
}

/* Contact */
.contact-section {
  padding: var(--section-padding);
}

.contact-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 40% 60%;
  gap: 4rem;
}

.contact-invite {
  font-size: 1.25rem;
  margin-bottom: 2rem;
}

.contact-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-details a {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.25rem;
  transition: border-color var(--transition-fast);
}

.contact-details a:hover {
  border-color: var(--accent);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-field input,
.form-field textarea {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.btn-submit {
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: box-shadow var(--transition-fast);
}

.btn-submit:hover {
  box-shadow: 0 0 20px rgba(74, 222, 128, 0.4);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .featured-project {
    grid-template-columns: 1fr;
    padding: 2rem;
  }

  .hero-name {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }

  .hero-aside {
    order: -1;
  }

  .terminal-body {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
button:not(:disabled),[role="button"]{cursor:pointer}button:disabled{cursor:not-allowed}