:root {
  /* Colors - Light Theme (Cool, Technical, High Signal) */
  --bg-base: #f8fafc;
  /* Muted frost white */
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f5f9;
  --bg-surface-elevated: #e2e8f0;

  --text-primary: #0f172a;
  /* Ledger gray/slate */
  --text-secondary: #475569;
  --text-tertiary: #64748b;

  --border-subtle: rgba(15, 23, 42, 0.05);
  --border-default: rgba(15, 23, 42, 0.1);
  --border-strong: rgba(15, 23, 42, 0.2);

  --accent: #4f46e5;
  /* Cold indigo */
  --accent-muted: rgba(79, 70, 229, 0.1);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Space Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Layered Shadows - Light mode */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Colors - Dark Theme (Deep Space Black, Cold Neon Indigo) */
    --bg-base: #090b10;
    --bg-surface: #10141d;
    --bg-surface-hover: #161b26;
    --bg-surface-elevated: #1a202c;

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;

    --border-subtle: rgba(241, 245, 249, 0.05);
    --border-default: rgba(241, 245, 249, 0.1);
    --border-strong: rgba(241, 245, 249, 0.2);

    --accent: #6366f1;
    /* Brightened cold indigo for dark mode */
    --accent-muted: rgba(99, 102, 241, 0.15);

    /* Layered Shadows - Dark mode */
    --shadow-sm: 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.5), 0 8px 16px -4px rgba(0, 0, 0, 0.3), 0 4px 8px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 24px 48px -12px rgba(0, 0, 0, 0.6), 0 16px 32px -8px rgba(0, 0, 0, 0.4), 0 8px 16px -4px rgba(0, 0, 0, 0.2);
  }
}

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

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background-color: var(--accent-muted);
  color: var(--accent);
}

a {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
  transition: all var(--transition-fast);
}

a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-24) var(--space-6);
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-16);
  position: relative;
}

@media (max-width: 800px) {
  .container {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding: var(--space-12) var(--space-6);
  }
}

/* Left Sidebar (Sticky Profile) */
.sidebar {
  position: sticky;
  top: var(--space-24);
  height: max-content;
}

@media (max-width: 800px) {
  .sidebar {
    position: relative;
    top: 0;
  }
}

.profile-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--space-6);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.profile-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.profile-img-wrap {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--space-4);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-md);
}

.profile-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.name {
  font-size: 1.5rem;
  margin-bottom: var(--space-1);
}

.ens {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent);
  margin-bottom: var(--space-4);
  display: block;
}

.tagline {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  margin-bottom: var(--space-6);
  line-height: 1.5;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: 0.875rem;
}

.contact-list a {
  border: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
}

.contact-list a svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.8;
}

.contact-list a:hover {
  color: var(--text-primary);
}

.contact-list a:hover svg {
  opacity: 1;
  color: var(--accent);
}

/* Sidebar Sections */
.sidebar-section {
  margin-bottom: var(--space-8);
  /* Align with text inside the profile card: profile card padding (var(--space-6)) + icon width (16px) + gap (var(--space-2)) */
  padding-left: calc(var(--space-6) + 16px + var(--space-2));
}

.sidebar-title {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: var(--space-2);
}

.role-item {
  margin-bottom: var(--space-4);
}

.role-title {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.role-company {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.role-time {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

/* Main Content Area */
.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

section {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp var(--transition-slow) forwards;
}

section:nth-child(1) {
  animation-delay: 100ms;
}

section:nth-child(2) {
  animation-delay: 200ms;
}

section:nth-child(3) {
  animation-delay: 300ms;
}

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

.section-header {
  font-size: 1.75rem;
  border-bottom: 1px solid var(--border-default);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.section-header::before {
  content: '';
  display: block;
  width: 12px;
  height: 12px;
  background-color: var(--accent);
  border-radius: 2px;
}

.section-header::after,
.exp-role::after,
.role-title::after,
.name::after {
  content: '_';
  color: var(--accent);
  animation: blinkCursor 1s step-end infinite;
  margin-left: 2px;
  font-weight: 700;
}

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

/* Narrative / Character Arc */
.prose p {
  margin-bottom: var(--space-6);
  color: var(--text-secondary);
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose strong {
  color: var(--text-primary);
  font-weight: 500;
}

.signature-img {
  margin-top: var(--space-8);
  opacity: 0.8;
  max-width: 200px;
  mix-blend-mode: multiply;
}

@media (prefers-color-scheme: dark) {
  .signature-img {
    opacity: 0.7;
    filter: invert(1) hue-rotate(180deg) brightness(1.5);
    mix-blend-mode: screen;
  }
}

/* Experience Cards */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.experience-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  position: relative;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.experience-card:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.exp-role {
  font-size: 1.25rem;
  margin-bottom: 0;
  color: var(--text-primary);
}

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

.exp-time {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-tertiary);
  background-color: var(--bg-surface-elevated);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.exp-body {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-6);
}

.exp-body p {
  margin-bottom: var(--space-4);
}

.exp-achievements {
  list-style-type: none;
}

.exp-achievements li {
  position: relative;
  padding-left: var(--space-8);
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.exp-achievements li::before {
  content: '[0x]';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: -0.05em;
  opacity: 0.8;
  line-height: inherit;
  padding-top: 2px;
}

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

.project-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

.project-card:hover {
  border-color: var(--accent-muted);
  box-shadow: var(--shadow-md);
}

.project-title {
  font-family: var(--font-mono);
  font-size: 1.1rem;
}

.project-title a {
  border: none;
}

.project-title a::after {
  content: '↗';
  display: inline-block;
  margin-left: var(--space-2);
  font-size: 0.8em;
  color: var(--text-tertiary);
  transition: transform var(--transition-fast);
}

.project-title a:hover::after {
  transform: translate(2px, -2px);
  color: var(--accent);
}

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

/* Footer */
footer {
  text-align: center;
  padding: var(--space-12) 0;
  color: var(--text-tertiary);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  border-top: 1px solid var(--border-default);
  margin-top: var(--space-16);
}