/* ============================================================
   LLM HACKATHON — GPU / CUDA Dark Design
   Palette: NVIDIA Green #76b900 · Near-Black #080809
   ============================================================ */

:root {
  /* Backgrounds */
  --bg-deep:      #080809;
  --bg-panel:     #0e0f10;
  --bg-card:      #131415;
  --bg-elevated:  #181a1b;
  --bg-hover:     #1e2021;

  /* NVIDIA Green */
  --gpu-green:    #76b900;
  --gpu-bright:   #9ecf00;
  --gpu-dim:      #4d7a00;
  --gpu-glow:     rgba(118,185,0,0.22);
  --gpu-bg:       rgba(118,185,0,0.07);

  /* Text */
  --white-bright: #f0f4f8;
  --white-main:   #e2e8f0;
  --white-dim:    #94a3b8;
  --white-muted:  #475569;
  --white-ghost:  #1e2535;

  /* Accent data colours */
  --data-amber:   #f59e0b;
  --data-blue:    #38bdf8;
  --data-purple:  #a78bfa;

  /* Typography */
  --font-body:    'Inter', 'Helvetica Neue', sans-serif;
  --font-code:    'JetBrains Mono', 'Courier New', monospace;

  /* Effects */
  --glow-green:   0 0 12px rgba(118,185,0,0.55), 0 0 30px rgba(118,185,0,0.2);
  --glow-sm:      0 0 6px rgba(118,185,0,0.4);
  --border-subtle: 1px solid rgba(255,255,255,0.05);
  --border-green:  1px solid rgba(118,185,0,0.25);
  --border-panel:  1px solid rgba(255,255,255,0.07);

  --section-pad:   6rem 0;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 18px; }

body {
  background: var(--bg-deep);
  color: var(--white-main);
  font-family: var(--font-body);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
}

/* GPU die grid overlay — the silicon wafer effect */
.gpu-grid-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(118,185,0,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(118,185,0,0.025) 1px, transparent 1px);
  background-size: 44px 44px;
}

/* --- Keyframes --- */
@keyframes blink        { 0%,100%{opacity:1} 50%{opacity:0} }
@keyframes fade-up      { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }
@keyframes warp-sweep   { 0%{transform:translateX(-100%)} 100%{transform:translateX(110vw)} }
@keyframes pulse-glow   { 0%,100%{box-shadow:var(--glow-sm)} 50%{box-shadow:var(--glow-green)} }
@keyframes bounce-down  { 0%,100%{transform:translateY(0) rotate(45deg)} 50%{transform:translateY(5px) rotate(45deg)} }
@keyframes dot-travel   { 0%{left:0%;opacity:0} 10%{opacity:1} 90%{opacity:1} 100%{left:100%;opacity:0} }
@keyframes stage-in     { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:translateY(0)} }
@keyframes shimmer-bar  { 0%{background-position:-200% 0} 100%{background-position:200% 0} }

/* --- Utility --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2.5rem;
  position: relative; z-index: 1;
}

.section {
  padding: var(--section-pad);
  border-bottom: var(--border-subtle);
  position: relative;
}
.section--last { border-bottom: none; }

.section-title {
  font-family: var(--font-body);
  font-size: 2rem;
  font-weight: 300;
  color: var(--white-bright);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 0.5rem;
}
.section-title::after {
  content: '';
  display: block;
  width: 36px; height: 2px;
  background: var(--gpu-green);
  box-shadow: var(--glow-sm);
  margin: 0.75rem auto 0;
}

.section-desc {
  text-align: center;
  color: var(--white-dim);
  font-size: 1rem;
  margin-bottom: 3.5rem;
  letter-spacing: 0.02em;
}

.green  { color: var(--gpu-green); }
.dim    { color: var(--white-dim); }
.mono   { font-family: var(--font-code); }

.cursor {
  display: inline-block; width: 2px; height: 1.1em;
  background: var(--gpu-green); animation: blink 1s step-end infinite;
  vertical-align: text-bottom; margin-left: 3px;
  box-shadow: var(--glow-sm);
}

/* ============================================================
   NAVIGATION — CUDA / toolkit style
   ============================================================ */
.gpu-nav {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(8,8,9,0.96);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(118,185,0,0.12);
  height: 64px;
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 2.5rem;
  height: 100%;
  display: flex; justify-content: space-between; align-items: center;
}

/* Brand: pixel-chip logo */
.nav-brand {
  display: flex; align-items: center; gap: 0.6rem;
  text-decoration: none;
}
.brand-chip {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 2px; width: 20px; height: 20px;
}
.chip-block {
  background: var(--gpu-green);
  border-radius: 1px;
  box-shadow: 0 0 4px rgba(118,185,0,0.5);
}
.brand-text {
  font-family: var(--font-code);
  font-size: 0.9rem; font-weight: 600;
  color: var(--white-bright);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.brand-accent { color: var(--gpu-green); }

.nav-links { display: flex; align-items: center; gap: 0; }
.nav-link {
  color: var(--white-muted);
  text-decoration: none;
  font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0 1rem;
  height: 64px; display: flex; align-items: center;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.nav-link:hover, .nav-link.active {
  color: var(--white-bright);
  border-bottom-color: var(--gpu-green);
}
.nav-github {
  color: var(--gpu-green) !important;
  border: var(--border-green) !important;
  margin-left: 1rem; padding: 0.4rem 1rem !important;
  height: auto !important; border-radius: 2px;
  font-size: 0.75rem !important;
  border-bottom: var(--border-green) !important;
  transition: background 0.2s, box-shadow 0.2s !important;
}
.nav-github:hover { background: var(--gpu-bg) !important; box-shadow: var(--glow-sm) !important; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span { display: block; width: 22px; height: 1.5px; background: var(--white-main); }

/* ============================================================
   HERO — GPU Cluster / HPC Console
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  padding: 5rem 5% 4rem;
  position: relative; overflow: hidden;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 55% at 50% 100%, rgba(118,185,0,0.06) 0%, transparent 65%),
    radial-gradient(ellipse 50% 35% at 50% 0%, rgba(10,12,10,0.7) 0%, transparent 70%),
    var(--bg-deep);
}

/* Warp scan sweep */
.warp-scan {
  position: absolute; top: 0; left: 0;
  width: 280px; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(118,185,0,0.04), rgba(118,185,0,0.06), rgba(118,185,0,0.04), transparent);
  animation: warp-sweep 7s linear infinite;
  pointer-events: none; z-index: 0;
}

/* Particle canvas */
#gpu-canvas {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0; opacity: 0.6;
}

.hero-content {
  position: relative; z-index: 1;
  max-width: 860px; width: 100%;
  display: flex; flex-direction: column; align-items: center;
  animation: fade-up 0.9s ease both;
}

.hero-eyebrow {
  display: flex; align-items: center; gap: 0.6rem;
  flex-wrap: wrap; justify-content: center;
  margin-bottom: 1.5rem;
}
.eyebrow-tag {
  font-family: var(--font-code);
  font-size: 0.68rem; letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gpu-green);
  border: 1px solid rgba(118,185,0,0.3);
  padding: 0.2rem 0.5rem; border-radius: 2px;
  background: rgba(118,185,0,0.05);
}
.eyebrow-sep { color: var(--white-muted); font-size: 0.7rem; }

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  font-weight: 200;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white-bright);
  margin-bottom: 1.25rem;
  min-height: 2.4em;
  line-height: 1.15;
  font-family: var(--font-body);
}
.hero-title .green-word { color: var(--gpu-green); font-weight: 500; }

.hero-subtitle {
  color: var(--white-dim);
  font-size: 1rem;
  font-family: var(--font-code);
  letter-spacing: 0.04em;
  max-width: 620px;
  margin-bottom: 3rem;
  min-height: 1.4em;
}

/* HUD strip */
.hero-hud {
  display: flex; align-items: stretch;
  border: var(--border-green);
  background: rgba(8,8,9,0.8);
  backdrop-filter: blur(10px);
  margin-bottom: 2.5rem;
  overflow: hidden;
}
.hud-item {
  padding: 1rem 1.5rem;
  display: flex; flex-direction: column;
  align-items: center; gap: 0.15rem;
}
.hud-divider {
  width: 1px;
  background: rgba(118,185,0,0.15);
  align-self: stretch;
}
.hud-val {
  font-family: var(--font-code);
  font-size: 1.55rem; font-weight: 300;
  color: var(--gpu-green); line-height: 1;
  letter-spacing: -0.01em;
}
.hud-unit {
  font-size: 0.6rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--white-dim);
}
.hud-lbl {
  font-size: 0.58rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--white-muted);
}

/* Buttons */
.hero-cta {
  display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center;
}
.btn {
  font-family: var(--font-body);
  font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.85rem 2.2rem; text-decoration: none;
  border-radius: 2px; display: inline-block;
  transition: all 0.22s; border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--gpu-green);
  color: #000; font-weight: 600;
  border-color: var(--gpu-green);
  box-shadow: var(--glow-sm);
}
.btn-primary:hover { background: var(--gpu-bright); box-shadow: var(--glow-green); }
.btn-ghost {
  background: transparent;
  color: var(--white-dim);
  border-color: rgba(255,255,255,0.15);
}
.btn-ghost:hover { border-color: rgba(255,255,255,0.4); color: var(--white-bright); }

.scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--white-muted); font-size: 0.6rem; letter-spacing: 0.15em;
  text-transform: uppercase; z-index: 1;
}
.scroll-arrow {
  width: 9px; height: 9px;
  border-right: 1.5px solid var(--white-muted);
  border-bottom: 1.5px solid var(--white-muted);
  animation: bounce-down 1.6s ease infinite;
}
.scroll-label { font-family: var(--font-code); }

/* ============================================================
   ARCHITECTURE — Animated RAG Pipeline
   ============================================================ */
.rag-pipeline {
  display: flex; align-items: center;
  justify-content: center;
  flex-wrap: nowrap; gap: 0;
  margin-bottom: 3.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.arch-stage {
  background: var(--bg-panel);
  border: var(--border-panel);
  padding: 1.5rem 1.1rem;
  text-align: center;
  min-width: 150px; flex: 1;
  position: relative;
  opacity: 0; transform: translateY(12px);
  transition: background 0.2s, border-color 0.2s;
}
.arch-stage.stage-active {
  animation: stage-in 0.4s ease forwards;
}
.arch-stage:hover {
  background: var(--bg-card);
  border-color: rgba(118,185,0,0.2);
}
.arch-stage::after {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: transparent;
  transition: background 0.3s;
}
.arch-stage.stage-active::after { background: var(--gpu-green); box-shadow: var(--glow-sm); }
.arch-stage--final.stage-active::after { box-shadow: var(--glow-green); }

.stage-icon  { font-size: 1.6rem; margin-bottom: 0.5rem; display: block; }
.stage-name  {
  font-family: var(--font-code);
  font-size: 0.75rem; font-weight: 600;
  color: var(--white-bright); letter-spacing: 0.12em;
  text-transform: uppercase; margin-bottom: 0.6rem;
}
.stage-detail {
  font-size: 0.72rem; color: var(--white-muted);
  line-height: 1.6; margin-bottom: 0.75rem;
}
.stage-badge {
  font-family: var(--font-code);
  font-size: 0.6rem; color: var(--gpu-green);
  background: var(--gpu-bg); border: var(--border-green);
  padding: 0.2rem 0.45rem; border-radius: 2px;
  letter-spacing: 0.05em; display: inline-block;
}

/* Connector with travelling dot */
.arch-connector {
  flex-shrink: 0; width: 40px;
  position: relative; height: 2px;
  align-self: center;
}
.connector-line {
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: rgba(118,185,0,0.2);
}
.connector-dot {
  position: absolute; top: 50%;
  width: 7px; height: 7px;
  background: var(--gpu-green);
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 6px rgba(118,185,0,0.8);
  animation: dot-travel 2.4s linear infinite;
  left: 0%;
}

/* Callouts row */
.arch-callouts {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--white-ghost);
  border: var(--border-subtle);
}
.callout {
  background: var(--bg-panel);
  padding: 1.5rem;
  display: flex; gap: 1rem; align-items: flex-start;
  transition: background 0.2s;
}
.callout:hover { background: var(--bg-card); }
.callout-icon { font-size: 1.4rem; flex-shrink: 0; }
.callout-title {
  font-size: 0.88rem; font-weight: 500;
  color: var(--white-bright); margin-bottom: 0.3rem;
}
.callout-desc {
  font-size: 0.78rem; color: var(--white-muted); line-height: 1.6;
}

/* ============================================================
   MODES — Three specialised task cards
   ============================================================ */
.modes-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.mode-card {
  background: var(--bg-panel);
  border: var(--border-panel);
  border-radius: 2px;
  padding: 1.75rem;
  cursor: pointer;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
  position: relative; overflow: hidden;
}
.mode-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: transparent; transition: background 0.3s;
}
.mode-card--active {
  border-color: rgba(118,185,0,0.35);
  background: var(--bg-card);
  box-shadow: var(--glow-sm);
}
.mode-card--active::before { background: var(--gpu-green); }
.mode-card:hover:not(.mode-card--active) {
  border-color: rgba(118,185,0,0.15);
  background: var(--bg-elevated);
}

.mode-header {
  display: flex; align-items: center; gap: 0.85rem;
  margin-bottom: 0.85rem;
}
.mode-icon { font-size: 1.5rem; flex-shrink: 0; }
.mode-name {
  font-size: 1.05rem; font-weight: 500;
  color: var(--white-bright); letter-spacing: 0.04em;
}
.mode-tag {
  font-family: var(--font-code);
  font-size: 0.58rem; letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gpu-green); background: var(--gpu-bg);
  border: var(--border-green);
  padding: 0.15rem 0.4rem; border-radius: 1px;
  margin-left: auto; flex-shrink: 0;
}

.mode-desc {
  font-size: 0.85rem; color: var(--white-dim);
  line-height: 1.65; margin-bottom: 1.25rem;
}

.mode-body { display: none; }
.mode-card--active .mode-body { display: block; }

.mode-prompt-label {
  font-family: var(--font-code);
  font-size: 0.6rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--gpu-green);
  margin-bottom: 0.5rem;
}
.mode-prompt {
  background: var(--bg-deep);
  border: var(--border-subtle);
  border-left: 2px solid var(--gpu-green);
  padding: 0.85rem 1rem;
  border-radius: 2px; margin-bottom: 1.25rem;
  overflow-x: auto;
}
.mode-prompt code {
  font-family: var(--font-code);
  font-size: 0.72rem; color: var(--white-dim);
  line-height: 1.65; white-space: pre-wrap;
}

.mode-example { display: flex; flex-direction: column; gap: 0.75rem; }
.example-row { display: flex; flex-direction: column; gap: 0.3rem; }
.example-label {
  font-family: var(--font-code);
  font-size: 0.58rem; letter-spacing: 0.18em;
  font-weight: 600;
}
.example-label--in  { color: var(--data-blue); }
.example-label--out { color: var(--gpu-green); }
.example-text {
  font-size: 0.82rem; color: var(--white-dim);
  font-style: italic;
}
.example-output {
  background: var(--bg-deep); border: var(--border-subtle);
  padding: 0.75rem 1rem; border-radius: 2px;
  overflow-x: auto; margin-top: 0.15rem;
}
.example-output code {
  font-family: var(--font-code);
  font-size: 0.7rem; color: var(--gpu-bright);
  white-space: pre-wrap; line-height: 1.55;
}

/* ============================================================
   PIPELINE — Data Ingestion Flow
   ============================================================ */

/* Chunk type cards */
.chunk-types {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--white-ghost);
  border: var(--border-subtle);
  margin-bottom: 3rem;
}
.chunk-type {
  background: var(--bg-panel);
  padding: 1.25rem; text-align: center;
  transition: background 0.2s;
}
.chunk-type:hover { background: var(--bg-card); }
.chunk-type--highlight { background: var(--bg-card); }
.chunk-ext {
  font-family: var(--font-code);
  font-size: 1.1rem; font-weight: 600;
  color: var(--gpu-green);
  letter-spacing: 0.05em; margin-bottom: 0.5rem;
}
.chunk-rule {
  font-size: 0.75rem; color: var(--white-dim);
  line-height: 1.6; margin-bottom: 0.5rem;
}
.chunk-rule code {
  font-family: var(--font-code);
  color: var(--gpu-bright); background: var(--gpu-bg);
  padding: 0.05rem 0.25rem; border-radius: 1px;
}
.chunk-lib {
  font-family: var(--font-code);
  font-size: 0.62rem; color: var(--white-muted);
  letter-spacing: 0.1em; text-transform: uppercase;
}

/* Pipeline steps */
.pipeline-steps {
  display: flex; flex-direction: column; gap: 0;
  background: var(--white-ghost);
  border: var(--border-subtle);
  margin-bottom: 3rem;
}
.pipeline-step {
  display: flex; align-items: flex-start; gap: 1.5rem;
  background: var(--bg-panel);
  padding: 1.75rem;
  border-bottom: var(--border-subtle);
  transition: background 0.2s;
  position: relative;
}
.pipeline-step:last-child { border-bottom: none; }
.pipeline-step:hover { background: var(--bg-card); }

.ps-num {
  font-family: var(--font-code);
  font-size: 0.62rem; color: var(--gpu-green);
  letter-spacing: 0.12em; font-weight: 600;
  flex-shrink: 0; width: 24px;
  margin-top: 0.2rem;
}
.ps-icon { font-size: 1.3rem; flex-shrink: 0; }
.ps-body { flex: 1; }
.ps-name {
  font-size: 1rem; font-weight: 500;
  color: var(--white-bright); margin-bottom: 0.2rem;
}
.ps-script {
  font-family: var(--font-code);
  font-size: 0.68rem; color: var(--gpu-green);
  margin-bottom: 0.5rem;
}
.ps-script code { color: var(--gpu-green); }
.ps-desc {
  font-size: 0.82rem; color: var(--white-dim);
  line-height: 1.65; margin-bottom: 0.75rem;
}
.ps-flow {
  display: flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-code); font-size: 0.72rem;
  margin-bottom: 0.65rem;
}
.ps-input  { color: var(--white-muted); }
.ps-arrow  { color: var(--gpu-green); font-weight: 600; }
.ps-output { color: var(--gpu-bright); }
.ps-tech   { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.ps-pill {
  font-family: var(--font-code);
  font-size: 0.6rem; padding: 0.15rem 0.45rem;
  border: var(--border-green); color: var(--gpu-green);
  border-radius: 1px; letter-spacing: 0.05em;
  background: var(--gpu-bg);
}

/* Pipeline summary stats */
.pipeline-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--white-ghost);
  border: var(--border-subtle);
}
.pstat {
  background: var(--bg-panel);
  padding: 1.5rem; text-align: center;
  transition: background 0.2s;
}
.pstat:hover { background: var(--bg-card); }
.pstat-val {
  font-family: var(--font-code);
  font-size: 1.3rem; font-weight: 300;
  color: var(--gpu-green); margin-bottom: 0.35rem;
  line-height: 1.2;
}
.pstat-lbl {
  font-size: 0.65rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--white-muted);
}

/* ============================================================
   TECH STACK — Card grid
   ============================================================ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--white-ghost);
  border: var(--border-subtle);
}
.tech-card {
  background: var(--bg-panel);
  padding: 1.75rem 1.5rem;
  transition: background 0.2s;
  position: relative;
}
.tech-card:hover { background: var(--bg-card); }
.tech-card::before {
  content: ''; position: absolute;
  left: 0; top: 0; bottom: 0; width: 0;
  background: var(--gpu-green);
  transition: width 0.2s ease;
}
.tech-card:hover::before { width: 2px; }

.tech-card-top {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 0.75rem;
}
.tech-icon { font-size: 1.35rem; }
.tech-tag {
  font-family: var(--font-code);
  font-size: 0.55rem; letter-spacing: 0.14em;
  text-transform: uppercase; padding: 0.15rem 0.4rem;
  border-radius: 1px; border: 1px solid;
}
.tech-tag--llm       { color: var(--gpu-bright); border-color: rgba(118,185,0,0.3); background: var(--gpu-bg); }
.tech-tag--vector-db { color: var(--data-blue);  border-color: rgba(56,189,248,0.3); background: rgba(56,189,248,0.05); }
.tech-tag--embeddings{ color: var(--data-purple);border-color: rgba(167,139,250,0.3); background: rgba(167,139,250,0.05); }
.tech-tag--gpu       { color: var(--gpu-green);  border-color: rgba(118,185,0,0.3); background: var(--gpu-bg); }
.tech-tag--inference { color: var(--data-amber); border-color: rgba(245,158,11,0.3); background: rgba(245,158,11,0.05); }
.tech-tag--ui        { color: var(--white-dim);  border-color: rgba(255,255,255,0.15); background: transparent; }
.tech-tag--ml        { color: var(--data-amber); border-color: rgba(245,158,11,0.3); background: rgba(245,158,11,0.05); }
.tech-tag--api       { color: var(--white-muted);border-color: rgba(255,255,255,0.1); background: transparent; }

.tech-name {
  font-size: 0.95rem; font-weight: 500;
  color: var(--white-bright); margin-bottom: 0.5rem;
}
.tech-desc {
  font-size: 0.78rem; color: var(--white-muted); line-height: 1.6;
}

/* ============================================================
   GITHUB STATS / SETUP
   ============================================================ */
.badges-row {
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center;
  margin-bottom: 2rem;
}
.badges-row img { border-radius: 2px; height: 20px; }

/* Terminal block */
.terminal-block {
  background: var(--bg-panel);
  border: var(--border-panel);
  border-radius: 4px; overflow: hidden;
  margin-bottom: 2rem;
}
.terminal-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 0.6rem 1rem;
  background: var(--bg-card);
  border-bottom: var(--border-subtle);
}
.tb-dot {
  width: 12px; height: 12px; border-radius: 50%;
}
.tb-dot--r { background: #ff5f57; }
.tb-dot--y { background: #ffbd2e; }
.tb-dot--g { background: var(--gpu-green); }
.tb-title {
  font-family: var(--font-code);
  font-size: 0.7rem; color: var(--white-muted);
  margin-left: 0.5rem; letter-spacing: 0.05em;
}
.terminal-code {
  padding: 1.5rem;
  overflow-x: auto;
}
.terminal-code code {
  font-family: var(--font-code);
  font-size: 0.82rem; line-height: 1.75;
  color: var(--white-dim);
}
.tc-cmd   { color: var(--gpu-bright); font-weight: 500; }
.tc-comment { color: var(--white-muted); }

/* File tree */
.file-tree {
  background: var(--bg-panel);
  border: var(--border-panel); border-radius: 4px; overflow: hidden;
}
.ft-label {
  padding: 0.6rem 1.25rem;
  font-family: var(--font-code);
  font-size: 0.62rem; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--white-muted);
  background: var(--bg-card); border-bottom: var(--border-subtle);
}
.ft-code {
  padding: 1.25rem 1.5rem; overflow-x: auto;
}
.ft-code code {
  font-family: var(--font-code);
  font-size: 0.78rem; line-height: 1.8;
  color: var(--white-dim);
}
.ft-green { color: var(--gpu-bright); }

/* ============================================================
   FOOTER
   ============================================================ */
.gpu-footer {
  background: var(--bg-panel);
  border-top: 2px solid var(--gpu-green);
  padding: 2rem 0;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 0.75rem;
  font-size: 0.72rem; letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.footer-brand {
  font-family: var(--font-code);
  color: var(--gpu-green); font-weight: 600;
  letter-spacing: 0.08em;
}
.footer-sep { color: var(--white-muted); margin: 0 0.4rem; }
.footer-sub { color: var(--white-muted); }
.footer-center { color: var(--white-muted); }
.footer-center .green { color: var(--gpu-green); }
.footer-right a {
  color: var(--gpu-green); text-decoration: none;
  transition: opacity 0.2s;
}
.footer-right a:hover { opacity: 0.75; }
.footer-tagline {
  text-align: center;
  font-family: var(--font-code);
  font-size: 0.62rem; color: var(--white-ghost);
  letter-spacing: 0.1em;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .modes-grid { grid-template-columns: 1fr; }
  .mode-body { display: block; }
  .mode-card--active { box-shadow: none; }
}

@media (max-width: 900px) {
  .rag-pipeline { flex-wrap: wrap; justify-content: center; }
  .arch-stage { min-width: 140px; flex: 0 1 auto; }
  .arch-connector { display: none; }
  .arch-callouts { grid-template-columns: 1fr; }
  .chunk-types { grid-template-columns: repeat(2, 1fr); }
  .pipeline-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --section-pad: 4rem 0; }
  .nav-inner { padding: 0 1.25rem; }
  .nav-toggle { display: flex; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; background: rgba(8,8,9,0.98);
    border-bottom: var(--border-subtle); padding: 0.5rem 0;
    gap: 0;
  }
  .nav-links.open { display: flex; }
  .nav-link {
    height: auto; padding: 0.85rem 2rem;
    border-bottom: none; border-left: 2px solid transparent;
  }
  .nav-link:hover { border-left-color: var(--gpu-green); }
  .nav-github { margin: 0.5rem 2rem !important; height: auto !important; }
  .hero-hud { flex-wrap: wrap; }
  .hud-item { min-width: 100px; }
  .tech-grid { grid-template-columns: 1fr; }
  .pipeline-step { flex-wrap: wrap; }
  .container { padding: 0 1.25rem; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 280px; text-align: center; }
  .chunk-types { grid-template-columns: 1fr; }
  .pipeline-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-hud { flex-direction: column; }
  .hud-divider { width: auto; height: 1px; }
  .modes-grid { grid-template-columns: 1fr; }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .warp-scan { animation: none; }
  .connector-dot { animation: none; }
  .cursor { animation: none; opacity: 1; }
  .scroll-indicator { display: none; }
  .arch-stage {
    opacity: 1; transform: none;
    animation: none !important;
  }
}