:root {
  --bg-primary: #0A0E14;
  --bg-surface: #111822;
  --text-primary: #E8ECF1;
  --text-secondary: #8A94A6;
  --accent: #00D4AA;
  --accent-secondary: #4A90D9;
  --border: rgba(232, 236, 241, 0.08);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --container-max: 1200px;
  --ease-expo: cubic-bezier(0.22, 1, 0.36, 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(--text-secondary);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* Typography */
.mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.2;
}

.section-title {
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: var(--space-3);
}

.accent {
  color: var(--accent);
}

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

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-2) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
}

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

.brand-name {
  font-family: var(--font-display);
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-3);
}

.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

.resume-link {
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.2s, color 0.2s;
}

.resume-link:hover,
.resume-link:focus-visible {
  background: var(--accent);
  color: var(--bg-primary);
}

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

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 4px 0;
  transition: transform 0.2s;
}

.mobile-menu {
  display: none;
  background: var(--bg-surface);
  padding: var(--space-3);
}

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-menu a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 1.1rem;
}

.mobile-menu a:hover {
  color: var(--accent);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: var(--space-7) var(--space-4) var(--space-5);
  background: var(--bg-primary);
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
  pointer-events: none;
}

.hero-content {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-6);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

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

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 1.1;
  margin-bottom: var(--space-3);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: var(--space-4);
}

.hero-chart {
  margin-bottom: var(--space-4);
}

.chart-svg {
  width: 200px;
  height: 60px;
}

.chart-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  animation: draw 1.5s ease forwards;
}

.chart-annotation {
  display: block;
  margin-top: var(--space-1);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s, background 0.2s, color 0.2s;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: scale(1.02);
  background: #00e6b8;
}

.btn-ghost {
  border: 1px solid var(--text-secondary);
  color: var(--text-primary);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.profile-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: var(--space-4);
  border-radius: 8px;
  text-align: center;
}

.profile-label {
  display: block;
  margin-bottom: var(--space-2);
}

.profile-image {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: var(--space-2);
}

.profile-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
}

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

.scroll-indicator {
  position: absolute;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-secondary);
  text-decoration: none;
  animation: bounce 2s infinite;
}

/* Sections */
.section-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-7) var(--space-4);
}

.section-annotation {
  margin-bottom: var(--space-2);
}

/* Specialization */
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.spec-copy {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.spec-subhead {
  font-size: 1rem;
  margin-bottom: var(--space-2);
}

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

.spec-list li {
  padding: var(--space-2) 0;
  border-left: 2px solid var(--accent);
  padding-left: var(--space-2);
  margin-bottom: var(--space-1);
  transition: border-color 0.2s;
}

.spec-list li:hover {
  border-color: var(--accent-secondary);
}

/* Approach */
.approach {
  background: var(--bg-surface);
}

.approach-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-6);
}

.process-list {
  list-style: none;
  counter-reset: process;
}

.process-item {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.process-number {
  font-size: 0.9rem;
  color: var(--accent);
  display: block;
  margin-bottom: var(--space-1);
}

.process-item h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-1);
}

.process-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.approach-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  align-self: start;
}

/* Capabilities */
.skill-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.skill-category {
  background: var(--bg-surface);
  padding: var(--space-4);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.skill-cat-title {
  font-size: 1.1rem;
  margin-bottom: var(--space-3);
  color: var(--accent);
}

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

.skill-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.skill-name {
  font-size: 0.9rem;
}

.skill-bar {
  width: 100px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.skill-fill {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
}

/* Performance */
.performance {
  background: var(--bg-primary);
  text-align: center;
}

.performance-copy {
  max-width: 600px;
  margin: 0 auto var(--space-5);
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.performance-chart {
  max-width: 600px;
  margin: 0 auto;
}

.perf-chart-svg {
  width: 100%;
  height: auto;
}

.perf-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
}

.perf-line:nth-child(2) {
  stroke: var(--accent-secondary);
}

.chart-labels {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-2);
}

/* Contact */
.contact {
  background: var(--bg-surface);
}

.contact-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-6);
}

.contact-copy {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

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

.form-field label {
  font-size: 0.9rem;
  margin-bottom: var(--space-1);
}

.form-field input,
.form-field textarea {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: border-color 0.2s;
}

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

.contact-info {
  padding: var(--space-4);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  align-self: start;
}

.contact-info p {
  margin-bottom: var(--space-2);
}

.contact-info a {
  color: var(--accent);
  text-decoration: none;
}

.availability {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* Footer */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: var(--space-4) 0;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer-inner p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-inner nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-3);
}

.footer-inner nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-inner nav a:hover {
  color: var(--accent);
}

/* Progress bar */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  width: 0%;
  z-index: 200;
  transition: width 0.1s;
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: var(--space-4);
  left: var(--space-4);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: scale(1.1);
}

/* Animations */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes draw {
  to { stroke-dashoffset: 0; }
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* Responsive */
@media (max-width: 768px) {
  .site-nav {
    display: none;
  }

  .resume-link {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .mobile-menu.open {
    display: block;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .hero-right {
    order: -1;
  }

  .profile-card {
    max-width: 300px;
    margin: 0 auto;
  }

  .spec-grid,
  .approach-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .approach-meta {
    order: -1;
  }

  .skill-categories {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    text-align: center;
  }

  .chart-labels {
    flex-direction: column;
    gap: var(--space-1);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }

  .chart-line,
  .perf-line {
    stroke-dasharray: none;
    stroke-dashoffset: 0;
  }
}
button:not(:disabled),[role="button"]{cursor:pointer}button:disabled{cursor:not-allowed}