/*
Theme Name: Polyopticon Lab
Theme URI: https://polyopticon.com
Author: Design Anticipation LLC
Description: A spatial + haptic interface platform theme. Light technical lab aesthetic with diagram-first design, thin grid lines, and minimal animation.
Version: 1.0.0
License: Proprietary
Text Domain: polyopticon
*/

/* ============================================
   CSS VARIABLES - LAB INSTRUMENTATION PALETTE
   ============================================ */
:root {
  /* Core Colors */
  --color-white: #FFFFFF;
  --color-off-white: #F9FAFB;
  --color-grid-line: #E5E7EB;
  --color-grid-subtle: #F0F1F3;
  --color-text-primary: #111827;
  --color-text-secondary: #4B5563;
  --color-text-muted: #6B7280;
  --color-accent: #1E3A5F;
  --color-accent-hover: #2D4A6F;
  --color-accent-light: #EBF4FF;
  --color-module-border: #D1D5DB;
  --color-module-bg: #FAFBFC;
  --color-card-label: #374151;
  
  /* Typography */
  --font-display: 'IBM Plex Mono', 'SF Mono', 'Consolas', monospace;
  --font-body: 'IBM Plex Sans', 'Segoe UI', -apple-system, sans-serif;
  --font-label: 'IBM Plex Mono', monospace;
  
  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Grid */
  --grid-max-width: 1200px;
  --grid-gap: 2rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-off-white);
  background-image: 
    linear-gradient(var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
}

/* Container with subtle grid overlay */
.site-wrapper {
  min-height: 100vh;
  background: linear-gradient(180deg, var(--color-off-white) 0%, var(--color-white) 100%);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--space-md);
  max-width: 65ch;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.container {
  width: 100%;
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-4xl) 0;
}

.section--compact {
  padding: var(--space-2xl) 0;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(249, 250, 251, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-grid-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  max-width: var(--grid-max-width);
  margin: 0 auto;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.site-logo::before {
  content: '◇';
  margin-right: var(--space-sm);
  color: var(--color-accent);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.main-nav a {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-accent);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  margin: 5px 0;
  transition: var(--transition-fast);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-off-white);
    border-bottom: 1px solid var(--color-grid-line);
    padding: var(--space-lg);
    gap: var(--space-md);
    display: none;
  }
  
  .main-nav.active {
    display: flex;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  padding: var(--space-4xl) 0;
  border-bottom: 1px solid var(--color-grid-line);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-headline {
  font-size: 2.75rem;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  max-width: 18ch;
}

.hero-subhead {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 45ch;
}

.hero-tag {
  font-family: var(--font-label);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-xl);
  opacity: 0.7;
}

.hero-media {
  position: relative;
  background: var(--color-module-bg);
  border: 1px solid var(--color-module-border);
  border-radius: 4px;
  padding: var(--space-lg);
  min-height: 400px;
}

.hero-media::before {
  content: 'DEVICE PREVIEW';
  position: absolute;
  top: var(--space-sm);
  left: var(--space-md);
  font-family: var(--font-label);
  font-size: 0.625rem;
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .hero-headline {
    font-size: 2rem;
  }
}

/* ============================================
   BUTTONS & CTAs
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-label);
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-md) var(--space-xl);
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-white);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-module-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.btn-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ============================================
   MODULE CARDS (LAB INSTRUMENTATION STYLE)
   ============================================ */
.module-card {
  background: var(--color-white);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  padding: var(--space-xl);
  position: relative;
  transition: border-color var(--transition-fast);
}

.module-card:hover {
  border-color: var(--color-accent);
}

.module-card::before {
  content: attr(data-label);
  position: absolute;
  top: calc(-0.5em - 1px);
  left: var(--space-md);
  padding: 0 var(--space-sm);
  background: var(--color-white);
  font-family: var(--font-label);
  font-size: 0.625rem;
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.module-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
}

.module-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Card Grid Layouts */
.card-grid {
  display: grid;
  gap: var(--space-lg);
}

.card-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.card-grid--6 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 900px) {
  .card-grid--3,
  .card-grid--6 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .card-grid--3,
  .card-grid--2,
  .card-grid--6 {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   FEATURE GRID (CAPABILITIES)
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.feature-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-white);
  border: 1px solid var(--color-grid-line);
  border-radius: 2px;
}

.feature-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-accent);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
}

.feature-content h4 {
  font-size: 0.9375rem;
  margin-bottom: var(--space-xs);
}

.feature-content p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   USE CASE TILES
   ============================================ */
.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.use-case-tile {
  background: var(--color-white);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  padding: var(--space-xl);
  transition: all var(--transition-fast);
  position: relative;
}

.use-case-tile::after {
  content: '→';
  position: absolute;
  bottom: var(--space-lg);
  right: var(--space-lg);
  font-family: var(--font-display);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  opacity: 0;
}

.use-case-tile:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.use-case-tile:hover::after {
  opacity: 1;
  color: var(--color-accent);
}

.use-case-tile h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.use-case-tile p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .use-case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .use-case-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header {
  margin-bottom: var(--space-2xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
}

/* ============================================
   METHOD DIAGRAM
   ============================================ */
.method-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-xl);
  background: var(--color-white);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  overflow-x: auto;
  margin-bottom: var(--space-lg);
}

.method-step {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  white-space: nowrap;
}

.method-step-label {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-primary);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-module-bg);
  border: 1px solid var(--color-grid-line);
  border-radius: 2px;
}

.method-arrow {
  color: var(--color-text-muted);
  font-size: 1.25rem;
}

.method-caption {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-style: italic;
  text-align: center;
}

/* ============================================
   GLOSSARY / VOCABULARY CARDS
   ============================================ */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.glossary-card {
  background: var(--color-white);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  padding: var(--space-lg);
}

.glossary-term {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.glossary-def {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .glossary-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .glossary-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   ACCORDION / DEEP DIVE
   ============================================ */
.accordion {
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  margin-bottom: var(--space-md);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  background: var(--color-white);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: var(--color-module-bg);
}

.accordion-title {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
}

.accordion-icon {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.accordion.active .accordion-icon {
  transform: rotate(45deg);
}

.accordion-content {
  display: none;
  padding: var(--space-lg);
  border-top: 1px solid var(--color-grid-line);
  background: var(--color-module-bg);
}

.accordion.active .accordion-content {
  display: block;
}

/* ============================================
   ARCHITECTURE DIAGRAM
   ============================================ */
.architecture-diagram {
  background: var(--color-white);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  padding: var(--space-2xl);
}

.architecture-layers {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.arch-layer {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-module-bg);
  border: 1px solid var(--color-grid-line);
  border-radius: 2px;
}

.arch-layer-label {
  flex-shrink: 0;
  width: 140px;
  font-family: var(--font-label);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.arch-layer-content {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

/* ============================================
   CREDIBILITY STRIP
   ============================================ */
.credibility-strip {
  background: var(--color-white);
  border-top: 1px solid var(--color-grid-line);
  border-bottom: 1px solid var(--color-grid-line);
  padding: var(--space-xl) 0;
}

.credibility-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.credibility-item {
  font-family: var(--font-label);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* ============================================
   CONTACT FORM
   ============================================ */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text-primary);
  background: var(--color-white);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* ============================================
   GALLERY / MEDIA
   ============================================ */
.gallery-section {
  display: grid;
  gap: var(--space-2xl);
}

.gallery-group h3 {
  font-size: 1rem;
  margin-bottom: var(--space-lg);
  color: var(--color-text-secondary);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.gallery-item {
  background: var(--color-white);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  overflow: hidden;
}

.gallery-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--color-module-bg);
}

.gallery-caption {
  padding: var(--space-md);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ============================================
   EXPLORATION TILES
   ============================================ */
.exploration-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.exploration-tile {
  background: var(--color-white);
  border: 1px solid var(--color-module-border);
  border-radius: 2px;
  padding: var(--space-xl);
  transition: all var(--transition-fast);
}

.exploration-tile:hover {
  border-color: var(--color-accent);
}

.exploration-tile h4 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.exploration-tile p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.exploration-link {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

@media (max-width: 768px) {
  .exploration-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-white);
  border-top: 1px solid var(--color-grid-line);
  padding: var(--space-2xl) 0;
}

.footer-inner {
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.footer-definition {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 50ch;
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.footer-links a {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.footer-links a:hover {
  color: var(--color-text-primary);
}

.footer-attribution {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ============================================
   PAGE-SPECIFIC STYLES
   ============================================ */

/* Platform Page - Definition Block */
.definition-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.definition-list h4 {
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
}

.definition-list ul {
  list-style: none;
}

.definition-list li {
  padding: var(--space-sm) 0;
  font-size: 0.9375rem;
  border-bottom: 1px solid var(--color-grid-line);
}

.definition-list li::before {
  content: '—';
  margin-right: var(--space-sm);
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .definition-block {
    grid-template-columns: 1fr;
  }
}

/* Shift Comparison */
.shift-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.shift-column {
  padding: var(--space-xl);
  border-radius: 2px;
}

.shift-column--old {
  background: var(--color-module-bg);
  border: 1px solid var(--color-grid-line);
}

.shift-column--new {
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent);
}

.shift-column h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
}

.shift-column p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .shift-comparison {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   ANIMATIONS (SUBTLE REVEALS)
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

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

/* Hover subtle lift */
.hover-lift {
  transition: transform var(--transition-fast);
}

.hover-lift:hover {
  transform: translateY(-2px);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}