:root {
  color-scheme: dark;
  --bg: #020403;
  --panel: rgba(4, 14, 8, 0.82);
  --panel-strong: rgba(3, 22, 12, 0.94);
  --line: rgba(64, 255, 123, 0.28);
  --line-strong: rgba(108, 255, 154, 0.58);
  --text: #dcffe6;
  --muted: #84b894;
  --green: #39ff88;
  --green-soft: #0aae4d;
  --amber: #ffe083;
  --shadow: rgba(21, 255, 102, 0.22);
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 25% 10%, rgba(24, 255, 100, 0.14), transparent 28rem),
    radial-gradient(circle at 80% 20%, rgba(255, 224, 131, 0.07), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background-image:
    linear-gradient(rgba(42, 255, 116, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 255, 116, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 85%);
}

a {
  color: inherit;
  text-decoration: none;
}

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

#matrix-rain {
  position: fixed;
  inset: 0;
  z-index: -2;
  width: 100vw;
  height: 100vh;
  opacity: 0.42;
}

.scanline {
  position: fixed;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.04) 0,
    rgba(255, 255, 255, 0.04) 1px,
    transparent 3px,
    transparent 7px
  );
  mix-blend-mode: overlay;
  opacity: 0.28;
}

.site-shell {
  width: min(calc(100% - 32px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand img {
  width: 50px;
  height: 50px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 28px var(--shadow);
}

.profile-photo {
  filter: grayscale(1) contrast(1.32) brightness(0.72);
}

.header-avatar {
  filter: contrast(1.18) saturate(1.05) brightness(0.84);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1.05rem;
  letter-spacing: 0;
}

.brand small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.76rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.nav-links a,
.button {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(2, 13, 7, 0.72);
  color: var(--text);
  box-shadow: inset 0 0 16px rgba(57, 255, 136, 0.07);
  transition: border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.nav-links a {
  padding: 9px 12px;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
}

.nav-links a:hover,
.button:hover {
  border-color: var(--green);
  color: var(--green);
  transform: translateY(-1px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.72fr);
  gap: 28px;
  align-items: stretch;
  padding: 42px 0 36px;
}

.hero-copy,
.profile-panel,
.post-card,
.certificate-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(145deg, var(--panel), rgba(0, 0, 0, 0.72));
  box-shadow: 0 0 44px rgba(0, 0, 0, 0.42), inset 0 0 38px rgba(57, 255, 136, 0.05);
  backdrop-filter: blur(12px);
}

.hero-copy {
  min-height: 460px;
  padding: clamp(28px, 6vw, 60px);
}

.terminal-kicker,
.section-title p,
.tag {
  color: var(--green);
  font-size: 0.78rem;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 20px;
  font-size: clamp(2.6rem, 6.3vw, 5.05rem);
  line-height: 1;
  letter-spacing: 0;
  text-shadow: 0 0 24px rgba(57, 255, 136, 0.22);
}

.hero-text {
  max-width: 720px;
  color: #b7ddc0;
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.8;
}

.command-line {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  margin: 34px 0;
  padding: 14px 16px;
  border: 1px solid rgba(57, 255, 136, 0.22);
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.58);
  color: var(--green);
}

.command-line code::after {
  content: "_";
  animation: blink 0.9s steps(2) infinite;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  font-weight: 700;
}

.button.primary {
  border-color: var(--green);
  background: rgba(34, 255, 118, 0.13);
  color: var(--green);
}

.profile-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px;
}

.portrait-frame {
  display: grid;
  min-height: 320px;
  place-items: center;
  border: 1px solid rgba(57, 255, 136, 0.26);
  border-radius: 6px;
  background:
    linear-gradient(135deg, rgba(57, 255, 136, 0.09), transparent),
    rgba(0, 0, 0, 0.36);
}

.portrait-frame img {
  width: min(82%, 330px);
  max-height: 330px;
  aspect-ratio: 1;
  border: 1px solid rgba(220, 255, 230, 0.22);
  border-radius: 6px;
  object-fit: cover;
  box-shadow: 0 0 30px rgba(57, 255, 136, 0.28);
}

.profile-meta {
  margin-top: 18px;
  padding: 18px;
  border-left: 2px solid var(--green);
  background: rgba(0, 0, 0, 0.3);
}

.profile-meta p {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.signal-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 16px;
}

.signal-grid span,
.tag-cloud span {
  border: 1px solid rgba(57, 255, 136, 0.2);
  border-radius: 4px;
  padding: 9px 10px;
  background: rgba(0, 0, 0, 0.34);
  color: var(--muted);
  font-size: 0.76rem;
}

.content-grid {
  padding: 36px 0;
}

.section-title {
  margin-bottom: 18px;
}

.section-title p {
  margin-bottom: 8px;
}

.section-title h2 {
  margin-bottom: 0;
  color: #f2fff5;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.post-feed {
  display: grid;
  gap: 16px;
}

.post-card {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  min-height: 170px;
  padding: 24px;
}

.post-card.featured {
  border-color: var(--line-strong);
}

.post-card h3,
.certificate-card h3 {
  margin: 10px 0;
  font-size: 1.25rem;
}

.post-card h3 a,
.post-card p a,
.writeup a {
  color: var(--green);
}

.post-card h3 a:hover,
.post-card p a:hover,
.writeup a:hover {
  color: var(--amber);
}

.post-card p,
.certificate-card p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.post-card time {
  flex: 0 0 auto;
  color: var(--amber);
  font-size: 0.8rem;
  white-space: nowrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border: 1px solid rgba(57, 255, 136, 0.28);
  border-radius: 999px;
  padding: 0 10px;
  background: rgba(57, 255, 136, 0.08);
}

.certificates {
  padding: 36px 0 68px;
}

.writeup {
  max-width: 920px;
  margin: 42px auto 72px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(145deg, var(--panel), rgba(0, 0, 0, 0.78));
  box-shadow: 0 0 44px rgba(0, 0, 0, 0.42), inset 0 0 38px rgba(57, 255, 136, 0.05);
  backdrop-filter: blur(12px);
  padding: clamp(22px, 5vw, 56px);
}

.writeup-header {
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(57, 255, 136, 0.22);
}

.writeup-header h1 {
  margin: 10px 0 18px;
  font-size: clamp(3rem, 10vw, 6rem);
}

.writeup-header p:not(.terminal-kicker),
.writeup p {
  color: #b7ddc0;
  line-height: 1.85;
}

.back-link {
  display: inline-flex;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 0.82rem;
}

.writeup-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.writeup-meta span {
  border: 1px solid rgba(57, 255, 136, 0.28);
  border-radius: 999px;
  padding: 7px 11px;
  background: rgba(57, 255, 136, 0.08);
  color: var(--green);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.writeup section {
  padding-top: 34px;
}

.writeup h2 {
  margin-bottom: 18px;
  color: #f2fff5;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
}

.writeup code {
  color: var(--green);
}

.writeup pre {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid rgba(57, 255, 136, 0.26);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.66);
  box-shadow: inset 0 0 26px rgba(57, 255, 136, 0.05);
  padding: 18px;
}

.writeup pre code {
  display: block;
  min-width: max-content;
  color: #dcffe6;
  font-size: 0.88rem;
  line-height: 1.65;
}

.writeup figure {
  margin: 26px 0;
  border: 1px solid rgba(57, 255, 136, 0.22);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.34);
  padding: 12px;
}

.writeup figure img {
  width: 100%;
  border-radius: 4px;
}

.writeup figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.certificate-card {
  overflow: hidden;
}

.certificate-preview {
  display: block;
}

.certificate-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-bottom: 1px solid rgba(57, 255, 136, 0.2);
}

.certificate-card img.badge-art {
  object-fit: contain;
  padding: 20px;
  background: radial-gradient(circle at 50% 42%, rgba(57, 255, 136, 0.08), rgba(0, 0, 0, 0.42));
}

.certificate-card img.certificate-full {
  object-fit: cover;
  object-position: center;
}

.certificate-card div {
  padding: 20px;
}

.cert-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

.cert-link:hover {
  color: var(--amber);
}

.cert-id {
  display: inline-flex;
  margin-top: 18px;
  color: var(--amber);
  font-size: 0.82rem;
  font-weight: 700;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 0.82rem;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@media (max-width: 920px) {
  .site-header,
  .hero {
    grid-template-columns: 1fr;
  }

  .site-header {
    display: grid;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero {
    padding-top: 32px;
  }

  .hero-copy {
    min-height: auto;
  }

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

@media (max-width: 560px) {
  .site-shell {
    width: min(calc(100% - 22px), var(--max-width));
  }

  .nav-links a {
    flex: 1 1 calc(50% - 8px);
    text-align: center;
  }

  .post-card,
  .site-footer {
    display: grid;
  }

  .post-card time {
    white-space: normal;
  }

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