/* ==========================================================================
   CSS ARCHITECTURE BLUEPRINT — IGGY PORTFOLIO SITE CORE
   Zero-Dependency, Content-First Layout System
   ========================================================================== */

/* --------------------------------------------------------------------------
   01. GLOBAL TOKENS & SYSTEM DEFAULTS
   -------------------------------------------------------------------------- */
* { 
  box-sizing: border-box; 
  margin: 0; 
  padding: 0; 
}

body {
  background-color: var(--void);
  color: var(--body);
  font-family: 'DM Sans', sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Base Typographic Hierarchies */
h1, h2, h3, .wordmark { 
  font-family: 'Fraunces', serif; 
  color: var(--headline); 
  font-weight: 400; 
}

p { 
  font-size: 1rem; 
  line-height: 1.6; 
  color: var(--body); 
}

/* System Focus Rings for Device Accessibility */
a:focus-visible, 
button:focus-visible, 
textarea:focus-visible, 
input:focus-visible {
  outline: 2px solid var(--accent); 
  outline-offset: 4px;
}

/* --------------------------------------------------------------------------
   02. STRUCTURAL SCAFFOLDING & MODULE LAYOUTS
   -------------------------------------------------------------------------- */
.container { 
  width: 100%; 
  max-width: var(--max-width); 
  margin: 0 auto; 
  padding: 0 2rem; 
}

.section { 
  padding: 8rem 0; 
}

.section-void { 
  background-color: var(--void); 
}

.section-surface { 
  background-color: var(--surface); 
  border-top: 1px solid var(--border); 
  border-bottom: 1px solid var(--border); 
}

.section-title { 
  font-size: 3rem; 
  margin-bottom: 1rem; 
  letter-spacing: -0.02em; 
}

.section-subtitle { 
  font-size: 1.25rem; 
  color: var(--muted); 
  margin-bottom: 3rem; 
  max-width: 600px; 
}

/* --------------------------------------------------------------------------
   03. GLOBAL NAVIGATION INFRASTRUCTURE
   -------------------------------------------------------------------------- */
.global-nav {
  position: fixed; 
  top: 0; 
  left: 0; 
  width: 100%; 
  z-index: 1000;
  background: rgba(10, 10, 11, 0.8); 
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: var(--max-width); 
  margin: 0 auto; 
  padding: 1rem 2rem;
  display: flex; 
  justify-content: space-between; 
  align-items: center;
}

.wordmark { 
  font-size: 1.5rem; 
  color: var(--accent); 
  text-decoration: none; 
  font-weight: 700; 
}

.nav-links { 
  display: flex; 
  align-items: center; 
  gap: 2rem; 
}

.nav-links a { 
  color: var(--body); 
  text-decoration: none; 
  font-size: 0.95rem; 
  transition: var(--transition-smooth); 
}

.nav-links a:hover { 
  color: var(--headline); 
}

/* Mobile Menu Toggle Control Primitives */
.menu-toggle { 
  display: none; 
  background: none; 
  border: none; 
  cursor: pointer; 
  flex-direction: column; 
  gap: 6px; 
}

.menu-toggle .bar { 
  width: 24px; 
  height: 1.5px; 
  background: var(--headline); 
  transition: var(--transition-smooth); 
}

/* --------------------------------------------------------------------------
   04. INTERFACE CONTROL PLATFORMS (BUTTONS & ELEMENTS)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; 
  align-items: center; 
  justify-content: center;
  padding: 0.75rem 1.5rem; 
  border-radius: 4px; 
  font-weight: 500; 
  text-decoration: none;
  font-size: 0.95rem; 
  transition: var(--transition-smooth); 
  cursor: pointer;
}

.btn-pill { 
  border-radius: 9999px; 
  font-size: 0.85rem; 
  padding: 0.5rem 1.2rem; 
  background: var(--accent); 
  color: white; 
}

.btn-primary { 
  background: var(--accent); 
  color: #fff; 
}

.btn-primary:hover { 
  transform: translateY(-1px); 
  box-shadow: 0 4px 12px var(--accent-dim); 
}

.btn-secondary { 
  border: 1px solid var(--border); 
  color: var(--headline); 
  background: transparent; 
}

.btn-secondary:hover { 
  border-color: var(--muted); 
  background: rgba(255,255,255,0.02); 
}

/* --------------------------------------------------------------------------
   05. HERO VIEWPORT ENGINE
   -------------------------------------------------------------------------- */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-grid { 
  display: grid; 
  grid-template-columns: 1.2fr 0.8fr; 
  gap: 4rem; 
  width: 100%; 
  align-items: center; 
  padding-top: 5rem; 
}

.eyebrow { 
  font-family: 'DM Mono', monospace; 
  color: var(--muted); 
  font-size: 0.85rem; 
  letter-spacing: 0.15em; 
  margin-bottom: 1rem; 
}

.hero-headline { 
  font-size: 5rem; 
  line-height: 1.05; 
  letter-spacing: -0.03em; 
  margin-bottom: 1.5rem; 
}

.hero-body { 
  font-size: 1.25rem; 
  color: var(--body); 
  max-width: 520px; 
  margin-bottom: 2.5rem; 
}

.cta-row { 
  display: flex; 
  gap: 1rem; 
}

.hero-right { 
  position: relative; 
  height: 450px; 
  width: 100%; 
}

#hero-canvas { 
  width: 100%; 
  height: 100%; 
  display: block; 
}

/* --------------------------------------------------------------------------
   06. STRUCTURAL GRID MATRIX MATRIX & DISPLAY SYSTEMS
   -------------------------------------------------------------------------- */
.expertise-strip {
  display: grid; 
  grid-template-columns: repeat(3, 1fr); 
  max-width: var(--max-width); 
  margin: 0 auto;
  border-top: 1px solid var(--border); 
  border-bottom: 1px solid var(--border); 
  padding: 3rem 2rem; 
  gap: 4rem;
}

.expertise-column h3 { 
  font-family: 'DM Sans', sans-serif; 
  font-size: 1.1rem; 
  font-weight: 500; 
  margin-bottom: 0.5rem; 
  color: var(--headline); 
}

.expertise-column p { 
  color: var(--muted); 
  font-size: 0.95rem; 
}

.grid { 
  display: grid; 
  grid-template-columns: repeat(3, 1fr); 
  gap: 2rem; 
}

.card {
  position: relative; 
  background: var(--surface); 
  border: 1px solid var(--border);
  padding: 2.5rem; 
  border-radius: 12px; 
  transition: var(--transition-smooth);
}

.card:hover {
  transform: translateY(-2px); 
  border-color: rgba(255, 77, 0, 0.4);
  box-shadow: 0 12px 24px rgba(0,0,0,0.2), 0 0 30px var(--accent-dim);
}

.card h3 { 
  font-size: 1.6rem; 
  margin: 1rem 0 0.5rem; 
}

.card p { 
  color: var(--body); 
  font-size: 0.95rem; 
  margin-bottom: 1.5rem; 
}

.mono-tag { 
  font-family: 'DM Mono', monospace; 
  font-size: 0.75rem; 
  color: var(--accent); 
  letter-spacing: 0.05em; 
}

.tech-pills { 
  display: flex; 
  flex-wrap: wrap; 
  gap: 0.5rem; 
}

.tech-pills span { 
  font-family: 'DM Mono', monospace; 
  font-size: 0.75rem; 
  background: var(--void); 
  border: 1px solid var(--border); 
  padding: 0.25rem 0.6rem; 
  border-radius: 4px; 
  color: var(--muted); 
}

.card-link-overlay, .row-link-overlay { 
  position: absolute; 
  inset: 0; 
  z-index: 2; 
}

/* --------------------------------------------------------------------------
   07. NARRATIVE STREAM PANELS (ARTICLES & ROWS)
   -------------------------------------------------------------------------- */
.articles-vertical-list { 
  display: flex; 
  flex-direction: column; 
  border-top: 1px solid var(--border); 
}

.article-row {
  position: relative; 
  display: grid; 
  grid-template-columns: 0.4fr 1.6fr 0.1fr; 
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border); 
  align-items: baseline; 
  transition: var(--transition-smooth);
}

.article-row:hover h3 { 
  color: var(--accent); 
}

.article-meta-side { 
  display: flex; 
  flex-direction: column; 
  gap: 0.25rem; 
  font-family: 'DM Mono', monospace; 
  font-size: 0.85rem; 
}

.mono-date { 
  color: var(--muted); 
}

.read-time { 
  color: var(--accent); 
  opacity: 0.8; 
}

.article-content-side h3 { 
  font-size: 1.75rem; 
  margin-bottom: 0.5rem; 
}

.article-content-side p { 
  color: var(--body); 
  font-size: 1rem; 
  max-width: 700px; 
}

/* --------------------------------------------------------------------------
   08. INTERACTIVE SYSTEM SIMULATORS (THE LESSONS SUITE)
   -------------------------------------------------------------------------- */
.lessons-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 2rem;
}

.lessons-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
  overflow-x: auto;
}

.tab-btn {
  background: none;
  border: none;
  padding: 1.25rem 2rem;
  color: var(--muted);
  font-family: 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.tab-btn:hover { 
  color: var(--headline); 
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--void);
}

.lesson-panel {
  display: none;
  padding: 3rem;
  min-height: 400px;
  background: var(--void);
}

.lesson-panel.active { 
  display: block; 
}

/* Lesson 1: Prompt Anatomy Block Sandbox */
.prompt-anatomy-app { 
  display: flex; 
  flex-direction: column; 
  gap: 1.5rem; 
}

textarea {
  width: 100%; 
  height: 120px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  color: var(--headline);
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  resize: none;
  transition: var(--transition-smooth);
}

textarea:focus { 
  border-color: var(--accent); 
}

.anatomy-visualizer {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  line-height: 1.8;
  min-height: 100px;
}

.anatomy-block {
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
  cursor: help;
  position: relative;
}

.anatomy-block.persona { background: rgba(255, 77, 0, 0.15); color: #FF7A33; border: 1px solid rgba(255,77,0,0.3); }
.anatomy-block.context { background: rgba(0, 208, 132, 0.15); color: #33FFB5; border: 1px solid rgba(0,208,132,0.3); }
.anatomy-block.structural-format { background: rgba(0, 140, 255, 0.15); color: #33A1FF; border: 1px solid rgba(0,140,255,0.3); }

/* Lesson 2: Attention Decays Metric Suite */
.context-visualizer-app { 
  display: flex; 
  flex-direction: column; 
  gap: 2rem; 
}

.slider-container { 
  display: flex; 
  flex-direction: column; 
  gap: 0.75rem; 
}

.slider-container label { 
  font-size: 0.95rem; 
  color: var(--body); 
}

input[type="range"] {
  -webkit-appearance: none; 
  appearance: none;
  width: 100%; 
  height: 6px;
  background: var(--border);
  border-radius: 9999px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; 
  appearance: none;
  width: 18px; 
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: var(--transition-smooth);
}

input[type="range"]::-webkit-slider-thumb:hover { 
  transform: scale(1.15); 
}

.context-bar-track {
  display: flex; 
  height: 44px;
  border-radius: 6px; 
  overflow: hidden;
  border: 1px solid var(--border);
  font-family: 'DM Mono', monospace; 
  font-size: 0.75rem; 
  text-align: center; 
  line-height: 42px;
}

.bar-segment { 
  transition: width 0.3s ease; 
  overflow: hidden; 
  white-space: nowrap; 
  text-overflow: ellipsis; 
}

.segment-system { background: #1E1E24; color: var(--muted); }
.segment-history { background: var(--accent-dim); color: var(--accent); border-right: 1px solid rgba(255,77,0,0.2); }
.segment-current { background: rgba(255, 255, 255, 0.05); color: var(--headline); border-right: 1px solid var(--border); }
.segment-empty { background: #0F0F11; color: var(--muted); }
.educational-callout { margin-top: 1rem; }
.educational-callout blockquote { border-left: 2px solid var(--accent); padding-left: 1rem; color: var(--muted); font-style: italic; }

/* Lesson 3: Topologies Loops Vector Mapping */
.agent-loop-app { 
  display: flex; 
  flex-direction: column; 
  gap: 2rem; 
  align-items: center; 
}

.agent-svg { 
  width: 100%; 
  max-width: 700px; 
  height: auto; 
}

.loop-node { 
  cursor: pointer; 
}

.loop-node circle { 
  fill: var(--surface); 
  stroke: var(--border); 
  stroke-width: 1.5px; 
  transition: var(--transition-smooth); 
}

.loop-node:hover circle { 
  fill: #18181C; 
  stroke: var(--muted); 
}

.loop-node text { 
  font-family: 'DM Sans', sans-serif; 
  font-size: 12px; 
  fill: var(--body); 
  text-anchor: middle; 
  font-weight: 500; 
  pointer-events: none; 
}

.loop-line { 
  stroke: var(--border); 
  stroke-width: 1.5px; 
  fill: none; 
}

.node-explanation {
  width: 100%; 
  background: var(--surface); 
  border: 1px solid var(--border);
  padding: 1.5rem; 
  border-radius: 8px; 
  text-align: center;
  font-size: 0.95rem; 
  color: var(--body); 
  min-height: 70px;
}

/* Lesson 4: Multi-Broker Lanes Matrix */
.workflow-container-box { 
  display: grid; 
  grid-template-columns: 1fr 1fr; 
  gap: 2rem; 
  margin-top: 1.5rem; 
}

.workflow-lane {
  background: var(--surface); 
  border: 1px solid var(--border);
  padding: 2rem; 
  border-radius: 8px; 
  opacity: 0.3;
  transition: var(--transition-smooth); 
  transform: scale(0.98);
}

.workflow-lane.active-lane { 
  opacity: 1; 
  transform: scale(1); 
  border-color: var(--muted); 
}

#workflow-panel-right.active-lane { 
  border-color: rgba(0, 208, 132, 0.3); 
  box-shadow: 0 0 20px rgba(0, 208, 132, 0.05); 
}

.workflow-lane h4 { 
  font-size: 1.1rem; 
  margin-bottom: 1.25rem; 
  color: var(--headline); 
}

.timeline-list { 
  list-style: none; 
  display: flex; 
  flex-direction: column; 
  gap: 0.75rem; 
}

.timeline-list li {
  font-family: 'DM Mono', monospace; 
  font-size: 0.85rem; 
  padding-left: 1.25rem; 
  position: relative; 
  color: var(--body);
}

.timeline-list li::before {
  content: "—"; 
  position: absolute; 
  left: 0; 
  color: var(--muted);
}

#workflow-panel-right .timeline-list li::before { 
  color: var(--green); 
}

.metric-highlight {
  margin-top: 2rem; 
  font-family: 'Fraunces', serif; 
  font-size: 1.5rem; 
  color: var(--green);
}

/* Lesson 5: Stream Simulator Terminal Mock */
.tester-app { 
  display: flex; 
  flex-direction: column; 
  gap: 1.5rem; 
}

.template-selector { 
  display: flex; 
  gap: 0.75rem; 
  flex-wrap: wrap; 
}

.tmpl-btn {
  background: var(--surface); 
  border: 1px solid var(--border);
  color: var(--body); 
  padding: 0.5rem 1rem; 
  border-radius: 4px;
  font-size: 0.85rem; 
  cursor: pointer; 
  transition: var(--transition-smooth);
}

.tmpl-btn:hover { 
  border-color: var(--muted); 
  color: var(--headline); 
}

.tester-input-row { 
  display: flex; 
  gap: 1rem; 
}

.tester-input-row input {
  flex: 1; 
  background: var(--surface); 
  border: 1px solid var(--border);
  padding: 0.75rem 1.25rem; 
  border-radius: 6px; 
  color: var(--headline);
  font-size: 0.95rem;
}

.tester-input-row input:focus { 
  border-color: var(--accent); 
  outline: none; 
}

.api-stream-box {
  background: #050506; 
  border: 1px solid var(--border);
  font-family: 'DM Mono', monospace; 
  font-size: 0.85rem; 
  color: #94A3B8;
  padding: 1.5rem; 
  border-radius: 6px; 
  min-height: 140px;
  white-space: pre-wrap; 
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   09. SIGNAL PROGRAMMATIC FILTER SYSTEM
   -------------------------------------------------------------------------- */
.filter-wrapper { 
  display: flex; 
  justify-content: center; 
  margin-bottom: 3rem; 
}

.filter-tabs {
  display: inline-flex; 
  background: var(--surface);
  border: 1px solid var(--border); 
  padding: 0.35rem; 
  border-radius: 9999px;
}

.filter-btn {
  background: none; 
  border: none; 
  color: var(--muted);
  padding: 0.5rem 1.25rem; 
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem; 
  font-weight: 500; 
  border-radius: 9999px;
  cursor: pointer; 
  transition: var(--transition-smooth);
}

.filter-btn:hover { 
  color: var(--headline); 
}

.filter-btn.active { 
  background: var(--void); 
  color: var(--accent); 
  border: 1px solid var(--border); 
}

/* --------------------------------------------------------------------------
   10. SITEWIDE INFRASTRUCTURE FOOTER DATA SYSTEM
   -------------------------------------------------------------------------- */
.global-footer { 
  background: var(--void); 
  border-top: 1px solid var(--border); 
  padding: 6rem 2rem 3rem; 
}

.footer-container { 
  max-width: var(--max-width); 
  margin: 0 auto; 
  display: flex; 
  justify-content: space-between; 
  margin-bottom: 4rem; 
}

.footer-left h3 { 
  font-size: 1.5rem; 
  margin-bottom: 1rem; 
}

.footer-left p { 
  max-width: 320px; 
  color: var(--muted); 
}

.footer-right { 
  display: flex; 
  gap: 2rem; 
}

.footer-right a { 
  color: var(--body); 
  text-decoration: none; 
  font-size: 0.95rem; 
}

.footer-right a:hover { 
  color: var(--accent); 
}

.footer-bottom { 
  max-width: var(--max-width); 
  margin: 0 auto; 
  border-top: 1px solid var(--border); 
  padding-top: 2rem; 
  font-family: 'DM Mono', monospace; 
  font-size: 0.8rem; 
  color: var(--muted); 
}

/* --------------------------------------------------------------------------
   11. RESPONSIVE ADAPTIVE LAYOUT MATRICES (BREAKPOINTS)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid { 
    grid-template-columns: repeat(2, 1fr); 
  }
}

@media (max-width: 768px) {
  /* Core Scaffolding Overrides */
  .hero-grid { 
    grid-template-columns: 1fr; 
    gap: 2rem; 
  }
  
  .hero-headline { 
    font-size: 3.5rem; 
  }
  
  .hero-right { 
    position: absolute; 
    inset: 0; 
    opacity: 0.15; 
    z-index: 0; 
    pointer-events: none; 
  }
  
  .hero-left { 
    z-index: 1; 
  }
  
  .expertise-strip { 
    grid-template-columns: 1fr; 
    gap: 2rem; 
  }
  
  .grid { 
    grid-template-columns: 1fr; 
  }
  
  #tools-grid { 
    min-height: 200px; 
    display: grid !important; 
  }

  .article-row { 
    grid-template-columns: 1fr; 
    gap: 1rem; 
  }
  
  .footer-container { 
    flex-direction: column; 
    gap: 3rem; 
  }

  /* Interactive Simulator Adjustments */
  .workflow-container-box { 
    grid-template-columns: 1fr; 
  }
  
  .lesson-panel { 
    padding: 1.5rem; 
  }
  
  .tester-input-row { 
    flex-direction: column; 
  }

  /* Mobile Navigation Viewport Strategy Fix */
  .menu-toggle { 
    display: flex; 
    z-index: 1001;
  }
  
  .nav-links {
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100vh;
    background: #0A0A0B; /* Match structural tokens --void background value securely */
    flex-direction: column; 
    justify-content: center;
    align-items: center;
    padding: 4rem 2rem; 
    gap: 2.5rem;
    box-sizing: border-box;

    /* Mobile Interaction Optimization Transforms */
    transform: translateY(-100%); 
    opacity: 0;
    visibility: hidden;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                opacity 0.3s ease, 
                visibility 0.3s ease;
  }

  /* Target state mapped explicitly for inline JavaScript event triggers */
  .nav-links.nav-active { 
    transform: translateY(0); 
    opacity: 1; 
    visibility: visible;
  }
}