/* ================================================================
   DECODER — Visual Identity System v2.0
   
   Design Philosophy:
   - Decoding as visual metaphor: chaos → clarity, noise → signal
   - Ownable: Nothing else looks like this
   - Bold: Truth machines are not modest
   - Functional: Every element serves truth-seeking
   ================================================================ */

:root {
  /* === PRIMARY PALETTE === */
  /* Deep void black — darker than most sites */
  --void: #030303;
  --void-elevated: #0a0a0a;
  --void-surface: #111111;
  --void-card: #161616;
  
  /* Decode Amber — warm, distinctive, ownable */
  --decode-amber: #FFB800;
  --decode-amber-dim: rgba(255, 184, 0, 0.15);
  --decode-amber-glow: rgba(255, 184, 0, 0.4);
  
  /* Signal Violet — connections, links, exploration */
  --signal-violet: #A855F7;
  --signal-violet-dim: rgba(168, 85, 247, 0.12);
  --signal-violet-glow: rgba(168, 85, 247, 0.35);
  
  /* Verified Green — decoded, confirmed, true */
  --verified: #4ADE80;
  --verified-dim: rgba(74, 222, 128, 0.1);
  
  /* Text hierarchy */
  --text-bright: #FFFFFF;
  --text-primary: #F5F5F5;
  --text-secondary: #A3A3A3;
  --text-muted: #666666;
  --text-dim: #404040;
  
  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-medium: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(255, 184, 0, 0.25);
  
  /* === TYPOGRAPHY === */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* === SPACING (8px base) === */
  --sp-1: 0.25rem;   /* 4px */
  --sp-2: 0.5rem;    /* 8px */
  --sp-3: 0.75rem;   /* 12px */
  --sp-4: 1rem;      /* 16px */
  --sp-5: 1.5rem;    /* 24px */
  --sp-6: 2rem;      /* 32px */
  --sp-8: 3rem;      /* 48px */
  --sp-10: 4rem;     /* 64px */
  --sp-12: 6rem;     /* 96px */
  --sp-16: 8rem;     /* 128px */
  
  /* === MOTION === */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  
  /* === EFFECTS === */
  --glow-amber: 0 0 40px var(--decode-amber-glow);
  --glow-violet: 0 0 30px var(--signal-violet-glow);
}

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

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

body {
  font-family: var(--font-display);
  background: var(--void);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* === BACKGROUND GRID — Signature Element === */
.grid-substrate {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: 
    linear-gradient(rgba(255, 184, 0, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 184, 0, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 20%, transparent 70%);
}

/* === THE DECODE LINE — Signature Animation === */
@keyframes decode-scan {
  0% { transform: translateX(-100%); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateX(100vw); opacity: 0; }
}

.decode-line {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--decode-amber), transparent);
  animation: decode-scan 8s var(--ease-in-out) infinite;
  z-index: 1000;
  pointer-events: none;
}

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--sp-4) var(--sp-6);
  background: rgba(3, 3, 3, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.2em;
  color: var(--decode-amber);
  text-decoration: none;
  text-transform: uppercase;
}

.logo::before {
  content: '◇';
  margin-right: var(--sp-2);
  opacity: 0.6;
}

.nav-links {
  display: flex;
  gap: var(--sp-6);
  align-items: center;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

.nav-cta {
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--border-accent);
  color: var(--decode-amber) !important;
}

.nav-cta:hover {
  background: var(--decode-amber-dim);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Mobile nav overlay */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 60px;
    left: var(--sp-4);
    right: var(--sp-4);
    flex-direction: column;
    background: var(--void-surface);
    padding: var(--sp-5);
    border: 1px solid var(--border-subtle);
    gap: var(--sp-4);
    display: none;
    z-index: 99;
  }
  
  .nav.open .nav-links {
    display: flex;
    animation: nav-slide 0.2s var(--ease-out);
  }
  
  .nav-links a {
    padding: var(--sp-2) 0;
    font-size: 0.9rem;
  }
}

@keyframes nav-slide {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === HERO — Massive, Bold, Unforgettable === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--sp-16) var(--sp-6);
  position: relative;
  overflow: hidden;
}

/* Radial glow behind hero */
.hero::before {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--decode-amber-dim) 0%, transparent 60%);
  pointer-events: none;
  opacity: 0.8;
}

.hero-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--sp-8);
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--border-subtle);
  background: var(--void-elevated);
}

.hero-title {
  font-size: clamp(3.5rem, 12vw, 9rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: var(--sp-6);
}

.hero-line {
  display: block;
}

.hero-line:first-child {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 0.4em;
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-2);
}

/* The key word — DECODED effect */
.decode-text {
  color: var(--text-bright);
  position: relative;
  display: inline-block;
}

.decode-text::after {
  content: '';
  position: absolute;
  bottom: 0.1em;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--decode-amber);
  box-shadow: var(--glow-amber);
}

/* Terminal cursor blink */
.cursor-blink {
  display: inline-block;
  width: 4px;
  height: 0.9em;
  background: var(--decode-amber);
  margin-left: 0.1em;
  vertical-align: middle;
  animation: cursor-blink 1s step-end infinite;
}

@keyframes cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: var(--sp-8);
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--sp-10);
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-4) var(--sp-6);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--decode-amber);
  color: var(--void);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-amber);
}

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

.btn-secondary:hover {
  border-color: var(--decode-amber);
  color: var(--decode-amber);
}

.hero-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.hero-meta .sep {
  margin: 0 var(--sp-3);
  opacity: 0.3;
}

/* === SECTIONS === */
.section {
  padding: var(--sp-16) var(--sp-6);
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.section-header {
  margin-bottom: var(--sp-10);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--decode-amber);
  margin-bottom: var(--sp-3);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--decode-amber);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: var(--sp-4);
  color: var(--text-bright);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* === FEATURED ESSAYS === */
.featured-essays {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-5);
}

.essay-card {
  padding: var(--sp-6);
  background: var(--void-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.essay-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--border-subtle);
  transition: background var(--duration-fast);
}

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

.essay-card:hover::before {
  background: var(--decode-amber);
}

.essay-card.featured {
  grid-column: span 2;
  padding: var(--sp-8);
  background: linear-gradient(135deg, var(--void-surface) 0%, var(--void-card) 100%);
}

.essay-card.featured::before {
  width: 4px;
  background: var(--decode-amber);
}

.essay-tier {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--sp-1) var(--sp-2);
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.essay-tier.decoded {
  background: var(--decode-amber-dim);
  color: var(--decode-amber);
  border: 1px solid rgba(255, 184, 0, 0.2);
}

.essay-tier.provisional {
  background: var(--signal-violet-dim);
  color: var(--signal-violet);
  border: 1px solid rgba(168, 85, 247, 0.2);
}

.essay-tier.exploratory {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

.essay-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.essay-domain {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.essay-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--sp-2);
  line-height: 1.3;
}

.essay-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.essay-title a:hover {
  color: var(--decode-amber);
}

.essay-card.featured .essay-title {
  font-size: 1.75rem;
}

.essay-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* === PRINCIPLES DATABASE === */
.database-section {
  background: var(--void-elevated);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--sp-12) var(--sp-6);
}

.database-interface {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--sp-6);
  align-items: start;
}

.database-search {
  margin-bottom: var(--sp-5);
}

.database-search input {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  background: var(--void);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.database-search input:focus {
  outline: none;
  border-color: var(--decode-amber);
}

.database-search input::placeholder {
  color: var(--text-dim);
}

.principle-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.graph-node {
  padding: var(--sp-2) var(--sp-3);
  background: var(--void);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--duration-fast);
  text-align: left;
}

.graph-node:hover {
  border-color: var(--decode-amber);
  color: var(--text-primary);
}

.graph-node.selected {
  background: var(--decode-amber-dim);
  border-color: var(--decode-amber);
  color: var(--decode-amber);
}

.graph-node.linked {
  background: var(--signal-violet-dim);
  border-color: var(--signal-violet);
  color: var(--signal-violet);
}

.graph-node .node-domain {
  display: block;
  font-size: 0.6rem;
  color: var(--text-dim);
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.database-detail {
  padding: var(--sp-5);
  background: var(--void);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  position: sticky;
  top: 80px;
}

.database-placeholder {
  color: var(--text-dim);
  font-size: 0.9rem;
  text-align: center;
  padding: var(--sp-8) 0;
}

.detail-domain {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--decode-amber);
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
}

.detail-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--sp-3);
  color: var(--text-bright);
}

.detail-statement {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--sp-4);
}

.detail-links {
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border-subtle);
}

.detail-links-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
}

.link-chip {
  display: inline-block;
  padding: var(--sp-1) var(--sp-2);
  margin: 2px;
  background: var(--signal-violet-dim);
  border: 1px solid rgba(168, 85, 247, 0.2);
  border-radius: 2px;
  color: var(--signal-violet);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  cursor: pointer;
  transition: all var(--duration-fast);
}

.link-chip:hover {
  background: var(--signal-violet);
  color: var(--void);
}

/* === METHOD SECTION === */
.method-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--sp-4);
}

.method-step {
  padding: var(--sp-4);
  background: var(--void-surface);
  border: 1px solid var(--border-subtle);
  border-top: 2px solid var(--decode-amber);
  text-align: center;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--decode-amber);
  margin-bottom: var(--sp-2);
}

.method-step h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--sp-2);
  color: var(--text-primary);
}

.method-step p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* === ABOUT / IDENTITY === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--sp-10);
  align-items: start;
}

.about-text {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-text p {
  margin-bottom: var(--sp-4);
}

.about-text .lead {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: var(--sp-5);
}

.about-text a {
  color: var(--decode-amber);
  text-decoration: none;
  border-bottom: 1px solid var(--decode-amber-dim);
}

.about-text a:hover {
  border-bottom-color: var(--decode-amber);
}

.about-stats {
  padding: var(--sp-6);
  background: var(--void-surface);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--decode-amber);
}

.stat {
  margin-bottom: var(--sp-5);
}

.stat:last-child {
  margin-bottom: 0;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--decode-amber);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === SUBSCRIBE === */
.subscribe-section {
  background: var(--void-elevated);
  border-top: 1px solid var(--border-subtle);
}

.subscribe-card {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  padding: var(--sp-10);
}

.subscribe-card h2 {
  font-size: 2rem;
  margin-bottom: var(--sp-3);
  color: var(--text-bright);
}

.subscribe-card p {
  color: var(--text-secondary);
  margin-bottom: var(--sp-6);
}

.subscribe-form {
  display: flex;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.subscribe-form input {
  flex: 1;
  padding: var(--sp-3) var(--sp-4);
  background: var(--void);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  color: var(--text-primary);
  font-size: 1rem;
}

.subscribe-form input:focus {
  outline: none;
  border-color: var(--decode-amber);
}

.subscribe-note {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.future-hook {
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.future-hook span {
  color: var(--signal-violet);
}

/* === FOOTER === */
.footer {
  padding: var(--sp-10) var(--sp-6);
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  color: var(--decode-amber);
  margin-bottom: var(--sp-3);
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--sp-5);
}

.footer-attribution {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-bottom: var(--sp-5);
  padding: var(--sp-2) var(--sp-4);
  background: var(--void-elevated);
  border: 1px solid var(--border-subtle);
}

.footer-attribution a {
  color: var(--text-muted);
  text-decoration: underline;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--sp-6);
  margin-bottom: var(--sp-5);
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
}

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

.footer-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.footer-meta a {
  color: inherit;
  text-decoration: underline;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .method-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .featured-essays {
    grid-template-columns: 1fr;
  }
  
  .essay-card.featured {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: clamp(2.5rem, 15vw, 4rem);
  }
  
  .method-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .database-interface {
    grid-template-columns: 1fr;
  }
  
  .database-detail {
    position: static;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .subscribe-form {
    flex-direction: column;
  }
  
  .footer-links {
    flex-wrap: wrap;
    gap: var(--sp-4);
  }
}

@media (max-width: 480px) {
  .method-grid {
    grid-template-columns: 1fr;
  }
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  .decode-line {
    animation: none;
  }
  
  .cursor-blink {
    animation: none;
    opacity: 1;
  }
  
  * {
    transition-duration: 0.01ms !important;
  }
}

/* === PRINT === */
@media print {
  .nav, .decode-line, .grid-substrate, .footer, .subscribe-section {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .hero {
    min-height: auto;
    padding: 2rem;
  }
}