/* ========================================
   Design Tokens — Dark / Blue / CryptoPunk
   ======================================== */
:root {
  --color-bg: #0B0F1A;
  --color-bg-raised: #111827;
  --color-surface: rgba(17, 24, 39, 0.7);
  --color-surface-border: rgba(56, 110, 189, 0.15);
  --color-text: #D1D5DB;
  --color-text-bright: #F0F4F8;
  --color-text-muted: #6B7280;
  --color-accent: #58A6FF;
  --color-accent-hover: #79B8FF;
  --color-purple: #8B5CF6;
  --color-border: rgba(99, 140, 200, 0.12);

  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

  --width-content: 680px;
  --width-wide: 880px;

  --space-xs: 0.375rem;
  --space-sm: 0.75rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
}


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

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

body {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

::selection {
  background: rgba(88, 166, 255, 0.25);
  color: var(--color-text-bright);
}


/* ========================================
   Animated Background
   ======================================== */
@keyframes gradientDrift {
  0%   { background-position: 0% 0%; }
  25%  { background-position: 100% 50%; }
  50%  { background-position: 50% 100%; }
  75%  { background-position: 0% 50%; }
  100% { background-position: 0% 0%; }
}

.background-anim {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    135deg,
    #0B0F1A 0%,
    #0F172A 20%,
    #131B2E 40%,
    #111D33 60%,
    #0E1526 80%,
    #0B0F1A 100%
  );
  background-size: 400% 400%;
  animation: gradientDrift 50s ease infinite;
}


/* ========================================
   Header & Navigation
   ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  background: rgba(11, 15, 26, 0.75);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: var(--width-wide);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-bright);
  letter-spacing: -0.02em;
}

.nav-logo::before {
  content: '> ';
  color: var(--color-accent);
}

.nav-logo:hover {
  color: var(--color-accent);
}

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

.nav-links a {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

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


/* ========================================
   Sections
   ======================================== */
.section {
  padding: var(--space-xl) var(--space-md);
}

.section-inner {
  max-width: var(--width-content);
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--color-text-bright);
  letter-spacing: -0.01em;
}

.section-title::before {
  content: '## ';
  color: var(--color-accent);
  opacity: 0.6;
}

.section-divider {
  width: 2rem;
  height: 1px;
  background: var(--color-accent);
  border: none;
  margin-bottom: var(--space-md);
  opacity: 0.4;
}


/* ========================================
   Hero
   ======================================== */
.hero {
  padding: var(--space-xl) var(--space-md) var(--space-lg);
  text-align: center;
}

.hero-inner {
  max-width: var(--width-content);
  margin: 0 auto;
}

.hero-avatar {
  width: 180px;
  height: 180px;
  border-radius: 8px;
  border: 2px solid var(--color-surface-border);
  background-color: var(--color-bg-raised);
  object-fit: cover;
  image-rendering: pixelated;
  margin: 0 auto var(--space-md);
  box-shadow:
    0 0 24px rgba(88, 166, 255, 0.1),
    0 0 60px rgba(139, 92, 246, 0.05);
}

.hero-name {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--space-xs);
  color: var(--color-text-bright);
}

.hero-title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.hero-tagline {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  max-width: 460px;
  margin: 0 auto;
  line-height: 1.6;
}


/* ========================================
   About
   ======================================== */
.about-text p {
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

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

.stat-row {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.stat {
  flex: 1;
  text-align: center;
  padding: var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}


/* ========================================
   Expertise
   ======================================== */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.expertise-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--space-md);
  transition: border-color 0.2s ease;
}

.expertise-card:hover {
  border-color: var(--color-surface-border);
}

.expertise-card h3 {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text-bright);
}

.expertise-card p {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  line-height: 1.55;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: var(--space-sm);
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 0.2rem 0.5rem;
  background: rgba(88, 166, 255, 0.08);
  border: 1px solid rgba(88, 166, 255, 0.15);
  border-radius: 3px;
  color: var(--color-accent);
  white-space: nowrap;
}


/* ========================================
   Blog Preview
   ======================================== */
.blog-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.blog-item {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-md);
}

.blog-item:last-child {
  border-bottom: none;
}

.blog-item-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 0.125rem;
}

.blog-item-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.blog-item-title a {
  color: var(--color-text-bright);
}

.blog-item-title a:hover {
  color: var(--color-accent);
}

.blog-item-excerpt {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  line-height: 1.55;
}

.view-all-link {
  display: inline-block;
  margin-top: var(--space-md);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.8125rem;
}


/* ========================================
   Contact
   ======================================== */
.contact-photo {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  object-fit: cover;
  display: inline-block;
  vertical-align: middle;
  margin-right: 0.375rem;
}

.contact-text {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.contact-links {
  display: flex;
  gap: var(--space-sm);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.8125rem;
  color: var(--color-text);
  transition: border-color 0.15s ease, color 0.15s ease;
}

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


/* ========================================
   Blog Post Page
   ======================================== */
.post {
  max-width: var(--width-content);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

.post-header {
  margin-bottom: var(--space-lg);
}

.post-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.post-header h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--color-text-bright);
}

.post-description {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  font-style: italic;
}

.post-content h2 {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-text-bright);
}

.post-content h3 {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  color: var(--color-text-bright);
}

.post-content p {
  margin-bottom: var(--space-sm);
}

.post-content ul,
.post-content ol {
  margin-bottom: var(--space-sm);
  padding-left: 1.25rem;
}

.post-content li {
  margin-bottom: 0.25rem;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(88, 166, 255, 0.08);
  padding: 0.15em 0.35em;
  border-radius: 3px;
  color: var(--color-accent);
}

.post-content pre {
  background: #0D1117;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: var(--space-sm);
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: var(--space-sm);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.post-content pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: inherit;
}

.post-content blockquote {
  border-left: 2px solid var(--color-purple);
  padding-left: var(--space-sm);
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-sm);
  font-size: 0.8125rem;
}

.post-content th,
.post-content td {
  text-align: left;
  padding: 0.375rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.post-content th {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-text-bright);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.post-content strong {
  color: var(--color-text-bright);
  font-weight: 600;
}

.post-footer {
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
}

.post-author {
  color: var(--color-text-muted);
}

.back-link {
  font-family: var(--font-mono);
  font-weight: 500;
}


/* ========================================
   Blog Listing Page
   ======================================== */
.blog-listing {
  max-width: var(--width-content);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

.blog-listing h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
  color: var(--color-text-bright);
}


/* ========================================
   Footer
   ======================================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-md);
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.footer-container {
  max-width: var(--width-wide);
  margin: 0 auto;
}

.footer-links {
  margin-top: var(--space-xs);
}

.footer-links .separator {
  margin: 0 0.375rem;
  color: var(--color-border);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}


/* ========================================
   Responsive
   ======================================== */
@media (max-width: 640px) {
  .nav-container {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .nav-links {
    gap: var(--space-sm);
  }

  .stat-row {
    flex-direction: column;
    gap: var(--space-xs);
  }

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

  .contact-links {
    flex-direction: column;
  }

  .post-footer {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .section {
    padding: var(--space-lg) var(--space-sm);
  }
}