@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@500;700;800&family=Fira+Code:wght@400;500&family=Inter:wght@400;500;600;700&display=swap");

:root {
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --bg-card: #1e1e1e;
  --accent-primary: #64ffda;
  --accent-color: #64ffda;
  --accent-secondary: #ff6b6b;
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #666666;
  --border-color: #333333;
  --hover-bg: #333333;
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Fira Code", "Geist Mono", "SF Mono", Consolas, monospace;
  --font-display: "DM Sans", var(--font-primary);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(100, 255, 218, 0.2);
  --nav-height: 70px;
  --max-page: 1200px;
  --max-content: 800px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-primary); background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
a { color: var(--accent-primary); text-decoration: none; transition: all var(--transition-fast); }
.container { max-width: var(--max-page); margin: 0 auto; padding: 0 var(--spacing-md); }

.navbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height);
  background: rgba(15, 15, 15, 0.95); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color); z-index: 1000; transition: all var(--transition-medium);
}
.nav-inner, .nav-container {
  max-width: var(--max-page); margin: 0 auto; padding: 0 var(--spacing-md); height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { font-size: 1.5rem; font-weight: 700; color: var(--accent-primary); font-family: var(--font-display); }
.nav-menu { display: flex; gap: var(--spacing-lg); align-items: center; }
.nav-link { color: var(--text-secondary); font-weight: 500; position: relative; padding: 0.5rem 0; }
.nav-link:hover, .nav-link.active { color: var(--accent-primary); }
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--accent-primary);
  transition: width var(--transition-medium);
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.hamburger { display: none; flex-direction: column; gap: 4px; background: none; border: 0; cursor: pointer; }
.hamburger span { width: 25px; height: 3px; background: var(--text-primary); transition: all var(--transition-medium); display: block; }
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }

.page-main { padding-top: var(--nav-height); }

.hero-landing {
  min-height: calc(100vh - var(--nav-height)); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden;
  background: radial-gradient(circle at 30% 70%, rgba(100, 255, 218, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 70% 30%, rgba(255, 107, 107, 0.1) 0%, transparent 50%);
}
.hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(900px 560px at 20% 65%, rgba(100, 255, 218, 0.13), transparent 60%),
    radial-gradient(780px 520px at 75% 35%, rgba(255, 107, 107, 0.12), transparent 62%);
  filter: blur(10px); opacity: 0.8; pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-title {
  margin-top: 0; margin-bottom: 1rem; font-size: clamp(2.4rem, 6vw, 3.5rem); font-weight: 800; line-height: 1.2;
  font-family: var(--font-display);
}
.hero-title span { color: var(--accent-color); }
.hero-subtitle {
  font-size: 1.25rem; color: var(--text-secondary); margin: 0 auto 2rem; line-height: 1.6; max-width: 900px;
}
.hero-stats { display: flex; justify-content: center; gap: var(--spacing-xl); margin-top: var(--spacing-xl); }
.stat, .stat-item { text-align: center; }
.stat-value, .stat-number {
  display: block; font-size: 2.5rem; font-weight: 800; color: var(--accent-primary); font-family: var(--font-display);
}
.stat-label {
  font-size: 0.9rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px;
}

.posts-section, .blog-grid-section { padding: var(--spacing-xl) 0; }
.post-grid, .blog-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: var(--spacing-lg);
}
.post-card, .blog-card {
  background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border-color); transition: all var(--transition-medium); cursor: pointer; padding: var(--spacing-md);
}
.post-card:hover, .blog-card:hover {
  transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--accent-primary);
}
.post-card h2 { font-size: 1.3rem; font-weight: 600; line-height: 1.4; margin-bottom: 0.75rem; font-family: var(--font-display); }
.post-meta { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; color: var(--text-muted); font-size: 0.9rem; flex-wrap: wrap; }
.post-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--text-muted); }
.post-excerpt { color: var(--text-secondary); line-height: 1.6; margin-bottom: 1.5rem; }
.read-more { color: var(--accent-primary); font-weight: 600; }
.read-more:hover { color: var(--accent-secondary); }

.article-wrap { max-width: var(--max-content); margin: 0 auto; padding: var(--spacing-xl) 0; min-height: 100vh; }
.back-row { margin-bottom: var(--spacing-lg); }
.back-link {
  background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-primary);
  padding: 0.75rem 1.5rem; border-radius: var(--radius-sm); display: inline-block; font-weight: 500;
}
.back-link:hover { background: var(--accent-primary); color: var(--bg-primary); border-color: var(--accent-primary); }

.article-header { margin-bottom: var(--spacing-xl); }
.article-header h1 {
  font-size: clamp(2.2rem, 5vw, 3rem); font-weight: 800; line-height: 1.2; margin-bottom: var(--spacing-sm); font-family: var(--font-display);
}
.article-meta { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-md); color: var(--text-muted); flex-wrap: wrap; }

.prose {
  max-width: none; margin: 0 auto; padding: var(--spacing-xl) var(--spacing-md);
  background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border-color);
}
.prose h1, .prose h2, .prose h3, .prose h4 {
  color: var(--text-primary); margin-top: var(--spacing-lg); margin-bottom: var(--spacing-sm); line-height: 1.3; font-family: var(--font-display);
}
.prose h2 { font-size: 2rem; color: var(--accent-primary); }
.prose h3 { font-size: 1.5rem; }
.prose p { margin-bottom: var(--spacing-md); line-height: 1.8; color: var(--text-secondary); font-size: 1.1rem; }
.prose ul, .prose ol { margin-bottom: var(--spacing-md); padding-left: var(--spacing-lg); color: var(--text-secondary); }
.prose li { margin-bottom: 0.5rem; line-height: 1.6; }
.prose code {
  background: var(--bg-secondary); color: var(--accent-primary); padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm); font-family: var(--font-mono); font-size: 0.9rem;
}
.prose pre {
  background: var(--bg-secondary); padding: var(--spacing-md); border-radius: var(--radius-sm);
  overflow-x: auto; margin: var(--spacing-md) 0; border: 1px solid var(--border-color);
}
.prose pre code { background: none; color: var(--text-primary); padding: 0; }
.prose img {
  max-width: 100%; height: auto; border-radius: var(--radius-sm); margin: var(--spacing-md) 0;
  border: 1px solid rgba(100, 255, 218, 0.15);
}
.prose .media figcaption { color: var(--text-muted); margin-top: 0.25rem; font-size: 0.95rem; }

.references { margin-top: var(--spacing-xl); padding-top: var(--spacing-lg); border-top: 1px solid var(--border-color); }
.references h2 { font-size: 2rem; color: var(--accent-primary); font-family: var(--font-display); margin-bottom: var(--spacing-sm); }
.reference-list { margin-left: 1.5rem; }
.reference-list li { margin-bottom: 0.75rem; color: var(--text-secondary); }

.empty-state { text-align: center; color: var(--text-muted); padding: var(--spacing-xl) var(--spacing-sm); }

.site-footer {
  text-align: center;
  padding: 5rem 0 4rem;
  color: var(--text-muted);
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: min(1400px, calc(100vw - 40px));
  transform: translateX(-50%);
  border-top: 1px solid var(--border-color);
}
.footer-title {
  font-size: clamp(2.6rem, 5vw, 3.7rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 2rem;
  font-family: var(--font-display);
  color: var(--accent-primary);
}
.footer-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin: 0 auto 3rem;
  max-width: 640px;
  line-height: 1.7;
}
.footer-links, .contact-methods {
  display: flex;
  gap: 1.4rem;
  justify-content: center;
  flex-wrap: wrap;
}
.footer-link, .contact-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.9rem;
  min-height: 64px;
  padding: 0.95rem 1.75rem;
  background: #1b1b1f;
  border: 1px solid #3a3a3f;
  border-radius: 12px;
  color: #d8d8d8;
  font-weight: 600;
  font-size: 1.02rem;
  box-shadow: var(--shadow-sm);
}
.footer-link:hover, .contact-link:hover {
  border-color: var(--accent-color);
  background: rgba(100, 255, 218, 0.05);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(100, 255, 218, 0.1);
  color: #ffffff;
}
.footer-link i, .contact-link i {
  color: var(--accent-color);
  font-size: 1.2rem;
}
.footer-copyright {
  margin-top: 3.2rem;
  padding-top: 1.6rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.4;
  position: relative;
}
.footer-copyright::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: min(1400px, calc(100vw - 40px));
  transform: translateX(-50%);
  border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-menu {
    position: fixed; top: var(--nav-height); left: 0; width: 100%; background: var(--bg-primary);
    border-top: 1px solid var(--border-color); flex-direction: column; align-items: center; gap: 0;
    padding: var(--spacing-md) 0; transform: translateX(-100%); transition: transform var(--transition-medium);
  }
  .nav-menu.is-open { transform: translateX(0); }
  .nav-link { padding: var(--spacing-sm) 0; width: 100%; text-align: center; }
  .hero-title { margin-top: 0; font-size: 2.5rem; }
  .hero-subtitle { font-size: 1.1rem; }
  .hero-stats { flex-direction: column; gap: var(--spacing-md); }
  .post-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
  .article-wrap { padding: var(--spacing-lg) 0; }
  .prose { padding: var(--spacing-md); }
  .footer-title { font-size: 2.5rem; margin-bottom: 1.5rem; }
  .footer-description { font-size: 1.1rem; margin-bottom: 2.5rem; padding: 0 1rem; }
  .footer-links { gap: 1rem; }
  .footer-link { width: min(100%, 440px); min-height: 56px; padding: 0.8rem 1.5rem; }
  .footer-copyright { margin-top: 4rem; padding-top: 2rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--spacing-sm); }
  .hero-title { font-size: 2rem; }
  .post-card { padding: var(--spacing-sm); }
}

/* Floating Icons Animation */
.floating-icons {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.floating-icon {
  position: absolute;
  color: var(--accent-color);
  opacity: 0.1;
  font-size: 1.5rem;
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  .floating-icon {
    animation: none;
    opacity: 0.05;
  }
}

/* Individual icon animations */
.icon-1 {
  top: 20%;
  left: -50px;
  animation: floatRight 20s linear infinite;
  animation-delay: 0s;
  font-size: 2rem;
  opacity: 0.08;
}

.icon-2 {
  top: 40%;
  right: -50px;
  animation: floatLeft 25s linear infinite;
  animation-delay: -5s;
  font-size: 1.8rem;
  opacity: 0.12;
}

.icon-3 {
  top: 60%;
  left: -50px;
  animation: floatRight 30s linear infinite;
  animation-delay: -10s;
  font-size: 2.2rem;
  opacity: 0.06;
}

.icon-4 {
  top: 80%;
  right: -50px;
  animation: floatLeft 22s linear infinite;
  animation-delay: -15s;
  font-size: 1.6rem;
  opacity: 0.1;
}

.icon-5 {
  top: 15%;
  left: -50px;
  animation: floatRight 28s linear infinite;
  animation-delay: -8s;
  font-size: 1.4rem;
  opacity: 0.09;
}

.icon-6 {
  top: 70%;
  right: -50px;
  animation: floatLeft 24s linear infinite;
  animation-delay: -12s;
  font-size: 1.9rem;
  opacity: 0.07;
}

.icon-7 {
  top: 30%;
  left: -50px;
  animation: floatRight 26s linear infinite;
  animation-delay: -3s;
  font-size: 1.7rem;
  opacity: 0.11;
}

.icon-8 {
  top: 50%;
  right: -50px;
  animation: floatLeft 21s linear infinite;
  animation-delay: -18s;
  font-size: 1.3rem;
  opacity: 0.08;
}

.icon-9 {
  top: 10%;
  left: -50px;
  animation: floatRight 32s linear infinite;
  animation-delay: -6s;
  font-size: 2.1rem;
  opacity: 0.05;
}

.icon-10 {
  top: 90%;
  right: -50px;
  animation: floatLeft 27s linear infinite;
  animation-delay: -9s;
  font-size: 1.5rem;
  opacity: 0.13;
}

.icon-11 {
  top: 25%;
  left: -50px;
  animation: floatRight 23s linear infinite;
  animation-delay: -14s;
  font-size: 1.8rem;
  opacity: 0.09;
}

.icon-12 {
  top: 65%;
  right: -50px;
  animation: floatLeft 29s linear infinite;
  animation-delay: -7s;
  font-size: 1.6rem;
  opacity: 0.06;
}

.icon-13 {
  top: 35%;
  left: -50px;
  animation: floatRight 31s linear infinite;
  animation-delay: -11s;
  font-size: 2rem;
  opacity: 0.1;
}

.icon-14 {
  top: 75%;
  right: -50px;
  animation: floatLeft 26s linear infinite;
  animation-delay: -16s;
  font-size: 1.4rem;
  opacity: 0.12;
}

.icon-15 {
  top: 45%;
  left: -50px;
  animation: floatRight 24s linear infinite;
  animation-delay: -4s;
  font-size: 1.7rem;
  opacity: 0.07;
}

/* Keyframe animations for floating icons */
@keyframes floatRight {
  0% {
    transform: translateX(-100px) translateY(0px) rotate(0deg);
  }
  25% {
    transform: translateX(25vw) translateY(-20px) rotate(90deg);
  }
  50% {
    transform: translateX(50vw) translateY(15px) rotate(180deg);
  }
  75% {
    transform: translateX(75vw) translateY(-10px) rotate(270deg);
  }
  100% {
    transform: translateX(calc(100vw + 100px)) translateY(0px) rotate(360deg);
  }
}

@keyframes floatLeft {
  0% {
    transform: translateX(100px) translateY(0px) rotate(0deg);
  }
  25% {
    transform: translateX(-25vw) translateY(20px) rotate(-90deg);
  }
  50% {
    transform: translateX(-50vw) translateY(-15px) rotate(-180deg);
  }
  75% {
    transform: translateX(-75vw) translateY(10px) rotate(-270deg);
  }
  100% {
    transform: translateX(calc(-100vw - 100px)) translateY(0px) rotate(-360deg);
  }
}

@media (max-width: 768px) {
  .floating-icon {
    display: none;
  }
}