/* ============================================
   nickjewell.ai — Design System
   Dark editorial. Fraunces + DM Sans.
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* --- Design Tokens --- */
:root {
  /* Fonts */
  --font-display: 'Fraunces', serif;
  --font-body: 'DM Sans', sans-serif;

  /* Backgrounds */
  --bg-primary: #080808;
  --bg-secondary: #0f0f0f;
  --bg-card: #141414;
  --bg-card-hover: #1a1a1a;

  /* Text */
  --text-primary: #f0ebe3;
  --text-secondary: #8a8279;
  --text-muted: #5a5550;

  /* Accent */
  --accent: #c8965a;
  --accent-dim: #c8965a33;
  --accent-hover: #daa76b;

  /* Borders */
  --border: #222019;
  --border-light: #2a2720;

  /* Verdict */
  --verdict-green: #4a9968;
  --verdict-amber: #c8965a;
  --verdict-red: #c45a5a;

  /* Taste Signatures */
  --taste-sophistication: #7a8ec8;
  --taste-pragmatism: #4a9968;
  --taste-caution: #c8965a;
  --taste-momentum: #c45a5a;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
}

/* --- Typography --- */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  line-height: 1.15;
}

h2 {
  font-size: 1.8rem;
  line-height: 1.3;
}

h3 {
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.3;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* --- Utility --- */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.body-large {
  font-size: 1.15rem;
  line-height: 1.8;
}

.text-muted {
  color: var(--text-muted);
}

.text-secondary {
  color: var(--text-secondary);
}

.text-accent {
  color: var(--accent);
}

/* --- Film Grain Overlay --- */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.5'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 2rem;
  background: rgba(8, 8, 8, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  transition: color 0.2s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
}

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

.nav-links a.active::after {
  width: 100%;
}

/* --- Sections --- */
section {
  padding: var(--space-24) var(--space-8);
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 3.5rem;
}

.section-number {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 300;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 5rem;
}

.hero h1 {
  margin-top: 1rem;
  margin-bottom: 1.5rem;
  max-width: 780px;
}

.hero .subtext {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 620px;
  margin-bottom: 2.5rem;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn-primary {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bg-primary);
  background: var(--accent);
  padding: 0.9rem 2rem;
  border: 1px solid var(--accent);
  text-decoration: none;
  transition: all 0.2s;
}

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

.btn-secondary {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-primary);
  background: transparent;
  padding: 0.9rem 2rem;
  border: 1px solid var(--border);
  text-decoration: none;
  transition: all 0.2s;
}

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

/* --- Framework Preview (Homepage) --- */
.layer-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 2.5rem;
}

.layer-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.2rem 1.5rem;
  border: 1px solid var(--border);
  border-bottom: none;
  background: var(--bg-card);
  transition: all 0.3s ease;
}

.layer-item:last-child {
  border-bottom: 1px solid var(--border);
}

.layer-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  padding-left: 2rem;
}

.layer-number {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent);
  min-width: 1.5rem;
}

.layer-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-primary);
  min-width: 140px;
}

.layer-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- Writing List --- */
.writing-list {
  display: flex;
  flex-direction: column;
}

.writing-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  align-items: baseline;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: all 0.2s;
}

.writing-item:hover {
  padding-left: 0.5rem;
}

.writing-date {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.writing-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text-primary);
  transition: color 0.2s;
}

.writing-item:hover .writing-title {
  color: var(--accent);
}

.writing-tag {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem 2.2rem;
  transition: all 0.35s ease;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 0;
  background: var(--accent);
  transition: height 0.4s ease;
}

.card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}

.card:hover::before {
  height: 100%;
}

.card-eyebrow {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.card h3 {
  margin-bottom: 1rem;
}

.card p {
  margin-bottom: 1rem;
}

.card-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.card-meta span {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.contact-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border);
  padding: 1rem 1.2rem;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.25s ease;
}

.contact-link:hover {
  border-color: var(--accent);
  padding-left: 1.5rem;
  color: var(--accent);
}

.contact-link .arrow {
  color: var(--text-muted);
  transition: color 0.2s, transform 0.2s;
}

.contact-link:hover .arrow {
  color: var(--accent);
  transform: translateX(4px);
}

.contact-note {
  margin-top: 2rem;
  font-size: 0.92rem;
  color: var(--text-muted);
  font-style: italic;
}

/* --- Footer --- */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Framework Page --- */
.framework-hero {
  padding-top: 8rem;
  padding-bottom: var(--space-16);
}

.framework-hero h1 {
  margin-top: 1rem;
  margin-bottom: 1.5rem;
}

.framework-hero .thesis {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 3rem;
}

/* Framework layer diagram (hero) */
.framework-diagram {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 500px;
}

.diagram-layer {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 0.9rem 1.2rem;
  border: 1px solid var(--border);
  border-bottom: none;
  background: var(--bg-card);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.diagram-layer:last-child {
  border-bottom: 1px solid var(--border);
}

.diagram-layer .num {
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 400;
  min-width: 1.2rem;
}

.diagram-layer .label {
  color: var(--text-primary);
  min-width: 130px;
}

.diagram-layer .note {
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: none;
  font-weight: 400;
}

/* --- Framework Layer Sections --- */
.layer-section {
  padding: var(--space-24) var(--space-8);
  border-top: 1px solid var(--border);
}

.layer-section:nth-child(even) {
  background: var(--bg-secondary);
}

.layer-intro {
  margin-bottom: 3rem;
}

.layer-intro h2 {
  margin-bottom: 0.75rem;
}

.layer-intro .measures {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 700px;
}

.pattern-group {
  margin-bottom: 3rem;
}

.pattern-group-title {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--verdict-red);
  margin-bottom: 1.5rem;
}

.pattern-group-title.success {
  color: var(--verdict-green);
}

.pattern {
  margin-bottom: 2.5rem;
}

.pattern h3 {
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.pattern p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.pattern-example {
  border-left: 2px solid var(--border);
  padding-left: 1.5rem;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.pattern-example p {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.7;
}

.signals {
  margin-top: 2rem;
}

.signals h4 {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.signals ul {
  list-style: none;
  padding: 0;
}

.signals li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.75rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.signals li::before {
  content: '\2192';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* --- Taste Scenarios --- */
.scenario {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem 2.2rem;
  margin-bottom: 1.5rem;
}

.scenario h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.scenario p {
  margin-bottom: 1rem;
}

.scenario-options {
  list-style: none;
  padding: 0;
  margin-top: 1rem;
}

.scenario-options li {
  padding: 0.6rem 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.scenario-options li:last-child {
  border-bottom: none;
}

.scenario-reveal {
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-style: italic;
}

/* --- Differentiator Table --- */
.diff-table-wrap {
  overflow-x: auto;
  margin-top: 2rem;
}

.diff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.diff-table th {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: left;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
}

.diff-table td {
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
  line-height: 1.5;
}

.diff-table tr td:first-child {
  color: var(--text-primary);
  font-weight: 500;
  min-width: 120px;
}

.diff-table tr td:last-child {
  color: var(--accent);
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: var(--space-24) var(--space-8);
  border-top: 1px solid var(--border);
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  section {
    padding: var(--space-16) 1.5rem;
  }

  .layer-section {
    padding: var(--space-16) 1.5rem;
  }

  .nav {
    padding: 1rem 1.2rem;
  }

  .nav-inner {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .nav-links {
    gap: 1.2rem;
  }

  .nav-links a {
    font-size: 0.72rem;
  }

  .hero {
    min-height: auto;
    padding-top: 7rem;
    padding-bottom: 4rem;
  }

  .writing-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .writing-tag {
    display: none;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .layer-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .layer-name {
    min-width: auto;
  }

  .diagram-layer .note {
    display: none;
  }

  .diff-table th,
  .diff-table td {
    padding: 0.75rem 0.8rem;
    font-size: 0.82rem;
  }

  .framework-hero {
    padding-top: 6rem;
  }
}

@media (max-width: 480px) {
  .nav {
    padding: 1rem 1rem;
  }

  .nav-inner {
    flex-wrap: nowrap;
    gap: 0;
  }

  .nav-logo {
    font-size: 0.9rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .nav-links {
    gap: 0.75rem;
    justify-content: flex-end;
  }

  .nav-links a {
    font-size: 0.65rem;
  }
}