/* ============================================================
   subtle.css — Merged Edition
   "Subtle with cyberpunk character"

   Foundation: subtle.css — clean readable cards, consistent
               design system, Font Awesome icons.
   Atmosphere: cybercore.css — dark void background, fine CRT
               scanlines, hero name glitch, geometric cut-corner
               cards with corner brackets.

   Self-contained — no external framework dependency.
   ============================================================ */

/* Font Awesome (icons in hero, projects, blog CTA) */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css');

/* ----------------------------------------------------------
   Design Tokens
   ---------------------------------------------------------- */
:root {
  /* Fonts */
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Share Tech Mono', monospace;

  /* Colors — Surfaces (dark void) */
  --bg-body: #0a0a0f;
  --bg-void-top: #0a0a0f;
  --bg-void-bottom: #06060a;
  --bg-card: #12121a;
  --bg-elevated: #1a1a2e;
  --bg-border: #1a1a2e;

  /* Colors — Text */
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b0;
  --text-muted: #606075;

  /* Colors — Accents */
  --accent-cyan: #00f0ff;
  --accent-magenta: #ff2a6d;

  /* Spacing (8px grid) */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;

  /* Typography */
  --fs-hero: clamp(2.5rem, 8vw, 5rem);
  --fs-h2: 1.4rem;
  --fs-h3: 1.05rem;
  --fs-body: 0.95rem;
  --fs-small: 0.8rem;

  /* Layout */
  --container-max: 1000px;
  --nav-height: 60px;

  /* Effects */
  --transition: 0.25s ease;
  --transition-slow: 0.3s ease;
  --radius: 8px;
  --radius-sm: 4px;

  /* Cut-corner size for cyber-cards */
  --card-cut: 20px;

  /* Scanline intensity */
  --scanline-opacity: 0.035;
}

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

/* ----------------------------------------------------------
   Base — dark void with atmospheric gradient mesh
   ---------------------------------------------------------- */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  background-color: var(--bg-body);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%,
      rgba(0, 240, 255, 0.06),
      transparent 70%),
    radial-gradient(ellipse 60% 40% at 90% 110%,
      rgba(255, 42, 109, 0.04),
      transparent 70%),
    linear-gradient(180deg, var(--bg-void-top) 0%, var(--bg-void-bottom) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Fine CRT scanlines across the entire viewport */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 2px,
    rgba(0, 0, 0, var(--scanline-opacity)) 2px,
    rgba(0, 0, 0, var(--scanline-opacity)) 4px
  );
}

::selection {
  background: var(--accent-cyan);
  color: var(--bg-body);
}

/* ----------------------------------------------------------
   Typography
   ---------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

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

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

a:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: 2px;
}

code {
  font-family: var(--font-body);
  font-size: 0.85em;
  background-color: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--bg-border);
}

/* ----------------------------------------------------------
   Nav — cybercore readability: better contrast, neon
   cyan border-bottom, uppercase links with hover underline
   ---------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(6, 6, 10, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.15);
  box-shadow: 0 2px 24px rgba(0, 240, 255, 0.06);
}

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

.nav-logo {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  color: var(--text-primary);
}

.nav-logo:hover {
  color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
}

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

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  padding: 2px 0;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

.nav-highlight {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
}

.nav-external::after {
  content: " ↗";
  font-size: 0.75em;
}

/* ----------------------------------------------------------
   Hero — horizontal layout: avatar left, text right, compact
   ---------------------------------------------------------- */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + var(--space-lg)) var(--space-md) var(--space-lg);
}

.hero-inner {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-lg);
  text-align: left;
  max-width: var(--container-max);
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.hero-avatar {
  width: clamp(140px, 22vw, 180px);
  height: clamp(140px, 22vw, 180px);
  min-width: 140px;
  border-radius: 50%;
  border: 2px solid var(--bg-border);
  object-fit: cover;
  transition: var(--transition-slow);
}

.hero-avatar:hover {
  border-color: var(--accent-cyan);
  box-shadow:
    0 0 20px rgba(0, 240, 255, 0.25),
    0 0 40px rgba(0, 240, 255, 0.1);
}

.hero-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-hero);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-primary);
  position: relative;
  animation: hero-glitch 4s infinite steps(1);
  white-space: nowrap;
}

@keyframes hero-glitch {
  0%, 88%, 100% {
    text-shadow: none;
  }
  89% {
    text-shadow:
      3px 0 0 var(--accent-magenta),
      -3px 0 0 var(--accent-cyan);
  }
  91% {
    text-shadow:
      -3px 0 0 var(--accent-magenta),
      3px 0 0 var(--accent-cyan);
  }
  93% {
    text-shadow:
      2px 0 0 var(--accent-magenta),
      -2px 0 0 var(--accent-cyan);
  }
  95% {
    text-shadow:
      -4px 0 0 var(--accent-magenta),
      4px 0 0 var(--accent-cyan);
  }
  97% {
    text-shadow: none;
  }
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--accent-cyan);
  text-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
  letter-spacing: 0.05em;
}

.hero-social {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}

.hero-social a {
  font-size: 1.3rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--bg-border);
  background: rgba(26, 26, 46, 0.5);
  transition: var(--transition);
}

.hero-social a:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
  transform: translateY(-2px);
  text-shadow: none;
}

/* ----------------------------------------------------------
   Sections — subtle border-left accent with soft cyan glow
   ---------------------------------------------------------- */
.section {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-left: 3px solid var(--accent-cyan);
  padding-left: var(--space-sm);
  margin-bottom: var(--space-md);
}

.section-desc {
  font-family: var(--font-body);
  color: var(--text-secondary);
  margin-top: -8px;
  margin-bottom: var(--space-lg);
}

.section-link {
  display: inline-block;
  margin-top: var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  letter-spacing: 0.03em;
}

/* ----------------------------------------------------------
   Talk Cards — subtle readable base + cybercore geometric
   cut-corner shape with corner brackets. Clean until hover.
   ---------------------------------------------------------- */
.talks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.talk-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-md);
  background-color: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  position: relative;
  isolation: isolate;
  /* Cybercore signature cut-corner */
  clip-path: polygon(
    0 0,
    calc(100% - var(--card-cut)) 0,
    100% var(--card-cut),
    100% 100%,
    var(--card-cut) 100%,
    0 calc(100% - var(--card-cut))
  );
  transition: border-color var(--transition),
              filter var(--transition),
              transform var(--transition);
}

/* Corner brackets — dim by default, bright on hover */
.talk-card::before,
.talk-card::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(0, 240, 255, 0.3);
  pointer-events: none;
  transition: border-color var(--transition);
  z-index: 1;
}

.talk-card::before {
  top: 2px;
  left: 2px;
  border-right: none;
  border-bottom: none;
}

.talk-card::after {
  right: 2px;
  bottom: 2px;
  border-top: none;
  border-left: none;
}

/* Hover: border + corner brackets brighten, glow follows shape */
.talk-card:hover {
  border-color: var(--accent-cyan);
  filter: drop-shadow(0 4px 16px rgba(0, 240, 255, 0.12));
  transform: translateY(-2px);
}

.talk-card:hover::before,
.talk-card:hover::after {
  border-color: var(--accent-cyan);
}

.talk-card:hover .talk-title {
  color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

.talk-date {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--accent-magenta);
  letter-spacing: 0.05em;
}

.talk-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h3);
  line-height: 1.4;
  color: var(--text-primary);
  transition: var(--transition);
}

.talk-event {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--text-secondary);
  margin-top: auto;
}

/* ----------------------------------------------------------
   Project Cards — unified style with talk cards
   ---------------------------------------------------------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-md);
  background-color: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  position: relative;
  isolation: isolate;
  clip-path: polygon(
    0 0,
    calc(100% - var(--card-cut)) 0,
    100% var(--card-cut),
    100% 100%,
    var(--card-cut) 100%,
    0 calc(100% - var(--card-cut))
  );
  transition: border-color var(--transition),
              filter var(--transition),
              transform var(--transition);
}

.project-card::before,
.project-card::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(0, 240, 255, 0.3);
  pointer-events: none;
  transition: border-color var(--transition);
  z-index: 1;
}

.project-card::before {
  top: 2px;
  left: 2px;
  border-right: none;
  border-bottom: none;
}

.project-card::after {
  right: 2px;
  bottom: 2px;
  border-top: none;
  border-left: none;
}

.project-card:hover {
  border-color: var(--accent-cyan);
  filter: drop-shadow(0 4px 16px rgba(0, 240, 255, 0.12));
  transform: translateY(-2px);
}

.project-card:hover::before,
.project-card:hover::after {
  border-color: var(--accent-cyan);
}

.project-card:hover .project-name {
  color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

.project-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h3);
  color: var(--text-primary);
  transition: var(--transition);
}

.project-desc {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--text-secondary);
  line-height: 1.5;
}

.project-meta {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--text-muted);
  margin-top: auto;
  padding-top: var(--space-xs);
}

.project-meta i {
  color: var(--accent-magenta);
  margin-right: 4px;
}

/* ----------------------------------------------------------
   Blog CTA — clean and prominent (from subtle)
   ---------------------------------------------------------- */
.section-blog {
  padding-bottom: var(--space-2xl);
}

.blog-cta-card {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background-color: rgba(0, 240, 255, 0.03);
  border: 2px solid var(--accent-cyan);
  border-radius: var(--radius);
  transition: var(--transition-slow);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.08);
}

.blog-cta-card:hover {
  background-color: rgba(0, 240, 255, 0.06);
  box-shadow: 0 0 0 1px rgba(0, 240, 255, 0.2), 0 8px 40px rgba(0, 240, 255, 0.15);
  transform: translateY(-2px);
}

.blog-cta-icon {
  font-size: 1.4rem;
  color: var(--accent-cyan);
  min-width: 24px;
  text-align: center;
}

.blog-cta-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.blog-cta-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

.blog-cta-desc {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--text-secondary);
}

.blog-cta-link {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--accent-cyan);
  letter-spacing: 0.03em;
  margin-left: auto;
  white-space: nowrap;
}

.blog-cta-card:hover .blog-cta-link {
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
}

/* ----------------------------------------------------------
   Content Pages (about, public-speaking)
   ---------------------------------------------------------- */
.content {
  max-width: 720px;
  margin: 0 auto;
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-md) var(--space-2xl);
}

.content h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-md);
  border-left: 3px solid var(--accent-cyan);
  padding-left: var(--space-sm);
  box-shadow: -4px 0 12px -4px rgba(0, 240, 255, 0.4);
}

.content h2:first-child {
  margin-top: 0;
}

.content p {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.7;
}

.content ul {
  list-style: none;
  margin-bottom: var(--space-md);
}

.content li {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--text-secondary);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--bg-border);
  line-height: 1.6;
}

.content li:last-child {
  border-bottom: none;
}

.content li::before {
  content: '\25B8\00a0';
  color: var(--accent-cyan);
}

/* ----------------------------------------------------------
   Footer
   ---------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--bg-border);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
}

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

.footer p {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ----------------------------------------------------------
   Responsive
   ---------------------------------------------------------- */
@media (max-width: 768px) {
  :root {
    --fs-h2: 1.2rem;
  }

  .nav-inner {
    padding: var(--space-xs) var(--space-sm);
  }

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

  .nav-links a {
    font-size: var(--fs-small);
  }

  .nav-logo {
    font-size: 0.95rem;
  }

  .hero {
    padding: calc(var(--nav-height) + var(--space-md)) var(--space-sm) var(--space-lg);
  }

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

  .hero-name {
    white-space: normal;
  }

  .hero-social {
    justify-content: center;
  }

  .hero-social a {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }

  .talks-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

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

  .blog-cta-card {
    padding: var(--space-lg) var(--space-md);
  }

  .blog-cta-title {
    font-size: 1.4rem;
  }

  .content {
    padding: calc(var(--nav-height) + var(--space-lg)) var(--space-sm) var(--space-xl);
  }
}

@media (max-width: 480px) {
  .nav-links {
    gap: var(--space-xs);
  }

  .hero-tagline {
    font-size: 0.95rem;
  }

  .hero-social {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ----------------------------------------------------------
   Accessibility — Reduced Motion
   ---------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .hero-name {
    text-shadow: none !important;
    animation: none !important;
  }
}

/* ----------------------------------------------------------
   Scrollbar (WebKit)
   ---------------------------------------------------------- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}