@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@300;400;500;600;700&family=Syne:wght@400;500;600;700;800&display=swap');

:root {
  --bg:           #102828;
  --bg2:          #173535;
  --bg3:          #1e4040;
  --card:         #173535;
  --card-hover:   #1e4040;
  --border:       #2a5a5a;
  --border2:      #3a7070;
  --teal:         #5ecfcf;
  --teal-bright:  #2dd4bf;
  --teal-glow:    rgba(94,207,207,0.15);
  --teal-glow2:   rgba(94,207,207,0.08);
  --teal-dim:     #45aaaa;
  --silver:       #e8f4f4;
  --text:         #e8f8f8;
  --text-dim:     #7acfcf;
  --text-muted:   #4a8888;
  --white:        #f4fcfc;
  --grid-color:   rgba(94,207,207,0.04);
  --font-mono:    'JetBrains Mono', monospace;
  --font-sans:    'Inter', sans-serif;
  --font-display: 'Syne', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(94,207,207,0.07) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 64px;
  height: 64px;
  background: rgba(16,40,40,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: 0.06em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--silver);
  text-decoration: none;
  text-transform: uppercase;
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--teal);
  transform: scaleX(0);
  transition: transform 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--teal); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

main {
  position: relative;
  z-index: 1;
  padding-top: 64px;
}

/* SECTION LABEL */
.section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.section-label .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 8px var(--teal);
  flex-shrink: 0;
}

.section-label h2 {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text);
}

.section-label .line {
  flex: 1; height: 1px;
  background: var(--border);
}

/* CARDS */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 26px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
  text-decoration: none;
  display: block;
  color: inherit;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--teal);
  transform: scaleY(0);
  transition: transform 0.2s;
  transform-origin: bottom;
}

.card:hover {
  border-color: var(--border2);
  background: var(--card-hover);
  transform: translateY(-2px);
}

.card:hover::before { transform: scaleY(1); }

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.card-category {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
}

.badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 3px;
}

.badge-live {
  background: rgba(45,212,191,0.12);
  color: var(--teal-bright);
  border: 1px solid rgba(45,212,191,0.3);
}

.badge-lab {
  background: rgba(122,192,192,0.1);
  color: #8dd4d4;
  border: 1px solid rgba(122,192,192,0.3);
}

.badge-project {
  background: rgba(94,207,207,0.08);
  color: var(--teal-dim);
  border: 1px solid rgba(94,207,207,0.2);
}

.card-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 10px;
  line-height: 1.3;
}

.card-desc {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--silver);
  margin-bottom: 16px;
  line-height: 1.7;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 16px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--teal);
  background: rgba(94,207,207,0.08);
  border: 1px solid rgba(94,207,207,0.2);
  border-radius: 3px;
  padding: 3px 10px;
}

.card-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--teal);
  letter-spacing: 0.08em;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary { background: var(--teal); color: var(--bg); }
.btn-primary:hover { background: var(--teal-bright); box-shadow: 0 0 20px rgba(94,207,207,0.3); }
.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--border2); }
.btn-secondary:hover { border-color: var(--teal); color: var(--teal); }

/* TERMINAL */
.terminal {
  background: #0c2020;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--font-mono);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: #102828;
  border-bottom: 1px solid var(--border);
}

.terminal-dots { display: flex; gap: 7px; }
.terminal-dots span { width: 13px; height: 13px; border-radius: 50%; }
.terminal-dots .red    { background: #ff5f57; }
.terminal-dots .yellow { background: #ffbd2e; }
.terminal-dots .green  { background: #28c940; }
.terminal-title { font-size: 13px; color: var(--text-dim); letter-spacing: 0.08em; }

.terminal-body { padding: 24px; min-height: 280px; overflow-y: auto; }

.terminal-line {
  display: flex;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 14px;
  opacity: 0;
  animation: fadeIn 0.1s forwards;
}

.terminal-line.cmd       { color: var(--white); }
.terminal-line.cmd .prompt { color: var(--teal); }
.terminal-line.info      { color: var(--text-dim); }
.terminal-line.teal-line { color: var(--teal); }
.terminal-line.success   { color: var(--teal-bright); }
.terminal-line.alert     { color: #ff8080; }

.cursor {
  display: inline-block;
  width: 9px; height: 16px;
  background: var(--teal);
  animation: blink 1s infinite;
  vertical-align: middle;
  margin-left: 2px;
}

@keyframes blink { 0%,50%{opacity:1} 51%,100%{opacity:0} }
@keyframes fadeIn { to { opacity: 1; } }

/* FILTER BAR */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 7px 16px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--silver);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--teal);
  color: var(--teal);
  background: var(--teal-glow2);
}

/* GRIDS */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

/* PAGE CONTAINERS */
.page-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 72px 80px;
}

.page-header { margin-bottom: 52px; }

.page-header h1 {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 14px;
}

.page-header p {
  font-family: var(--font-sans);
  font-size: 16px;
  color: var(--silver);
  max-width: 760px;
  line-height: 1.75;
}

/* DETAIL PAGE */
.detail-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 72px 80px;
}

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.08em;
  margin-bottom: 44px;
  transition: color 0.2s;
}

.detail-back:hover { color: var(--teal); }

.detail-header {
  margin-bottom: 44px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.detail-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.detail-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 16px;
}

.detail-desc {
  font-family: var(--font-sans);
  font-size: 16px;
  color: var(--silver);
  line-height: 1.8;
  margin-bottom: 20px;
}

.detail-tags { display: flex; flex-wrap: wrap; gap: 7px; }

/* MARKDOWN BODY */
.md-body {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--silver);
  line-height: 1.9;
}

.md-body h1, .md-body h2, .md-body h3, .md-body h4 {
  font-family: var(--font-display);
  color: var(--white);
  margin: 36px 0 14px;
  line-height: 1.3;
}

.md-body h1 { font-size: 24px; }
.md-body h2 { font-size: 20px; color: var(--teal); border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.md-body h3 { font-size: 17px; color: var(--text); }
.md-body h4 { font-size: 14px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.1em; }

.md-body p { margin-bottom: 18px; }
.md-body ul, .md-body ol { padding-left: 28px; margin-bottom: 18px; }
.md-body li { margin-bottom: 7px; }
.md-body a { color: var(--teal); text-decoration: none; }
.md-body a:hover { text-decoration: underline; }

.md-body code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(94,207,207,0.1);
  border: 1px solid rgba(94,207,207,0.2);
  border-radius: 3px;
  padding: 2px 8px;
  color: var(--teal);
}

.md-body pre {
  background: #0a1c1c;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
  overflow-x: auto;
  margin-bottom: 22px;
}

.md-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--teal-bright);
  font-size: 14px;
  line-height: 1.6;
}

.md-body blockquote {
  border-left: 3px solid var(--teal);
  padding: 14px 22px;
  background: var(--card);
  border-radius: 0 5px 5px 0;
  margin-bottom: 18px;
  color: var(--text);
}

.md-body img {
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin: 18px 0;
  display: block;
}

.md-body hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }

.md-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 22px;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}

.md-body th {
  background: var(--card);
  color: var(--teal);
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--border);
  letter-spacing: 0.06em;
  font-size: 12px;
  text-transform: uppercase;
  white-space: nowrap;
  font-family: var(--font-mono);
}

.md-body td {
  padding: 12px 16px;
  border: 1px solid var(--border);
  color: var(--silver);
  vertical-align: top;
}

.md-body tr:hover td { background: rgba(94,207,207,0.03); }

/* LOADING */
.loading-state {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 52px 0;
}

.loading-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--teal);
  animation: loadPulse 1.2s infinite;
}

.loading-dot:nth-child(2) { animation-delay: 0.2s; }
.loading-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes loadPulse {
  0%,80%,100% { opacity:0.3; transform:scale(0.8); }
  40% { opacity:1; transform:scale(1); }
}

/* FOOTER */
footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 24px 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

footer p {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* ANIMATIONS */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.6s forwards;
}

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

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* SCROLLBAR */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--teal-dim); }

/* RESPONSIVE */
@media (max-width: 1100px) {
  .page-container { padding: 56px 48px; }
  footer { padding: 20px 48px; }
  nav { padding: 0 48px; }
}

@media (max-width: 768px) {
  nav { padding: 0 16px; }
  .nav-brand { font-size: 13px; }
  .nav-links { gap: 12px; overflow-x: auto; }
  .nav-links a { font-size: 10px; letter-spacing: 0.08em; white-space: nowrap; }
  .page-container, .detail-container { padding: 40px 20px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  footer { padding: 16px 20px; flex-direction: column; gap: 6px; text-align: center; }
}

@media (max-width: 480px) {
  .nav-links { gap: 8px; }
  .nav-links a { font-size: 9px; letter-spacing: 0.06em; }
  .nav-brand { font-size: 12px; }
}

/* THREAD CANVAS BACKGROUND */
#thread-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
}