/* ============================================
   chriswykel.com — Warm Editorial Design System
   Inspired by Anthropic/Claude design language
   ============================================ */

/* ---- Design Tokens ---- */
:root {
  /* Surfaces */
  --parchment: #f5f4ed;
  --ivory: #faf9f5;
  --pure-white: #ffffff;
  --warm-sand: #e8e6dc;
  --near-black: #141413;
  --dark-surface: #30302e;

  /* Text */
  --ink: #141413;
  --olive-gray: #5e5d59;
  --stone-gray: #87867f;
  --warm-silver: #b0aea5;

  /* Accent */
  --terracotta: #c96442;
  --coral: #d97757;
  --focus-blue: #3898ec;

  /* Borders */
  --border-cream: #f0eee6;
  --border-warm: #e8e6dc;
  --border-dark: #30302e;
  --ring-warm: #d1cfc5;

  /* Typography */
  --font-display: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menospace, monospace;

  /* Layout */
  --maxw: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-pad: clamp(5rem, 12vh, 9rem);

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.7s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--ink);
  background: var(--parchment);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, picture, svg {
  max-width: 100%;
  display: block;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---- Layout Utilities ---- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: var(--section-pad) 0;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 1.5rem;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--olive-gray);
  line-height: 1.6;
  max-width: 620px;
  margin-bottom: 3rem;
}

/* ---- Navigation ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 244, 237, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-cream);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.nav-brand:hover {
  color: var(--terracotta);
}

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

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--olive-gray);
  transition: color 0.2s var(--ease);
}

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

.nav-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--ink);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--parchment);
    padding: 1.5rem var(--gutter);
    gap: 1.25rem;
    border-bottom: 1px solid var(--border-cream);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }
}

/* ---- Hero ---- */
.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  padding: calc(var(--section-pad) * 0.6) 0;
}

.hero-inner {
  max-width: 820px;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6vw, 4rem);
  font-weight: 500;
  line-height: 1.1;
  color: var(--ink);
  margin-bottom: 1.5rem;
}

.hero-tagline {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--olive-gray);
  line-height: 1.6;
  margin-bottom: 2.5rem;
  max-width: 640px;
}

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

.hero-scroll {
  margin-top: 4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--stone-gray);
  animation: bob 2.5s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(6px); opacity: 1; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.625rem 1.25rem;
  border-radius: 12px;
  transition: all 0.2s var(--ease);
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--terracotta);
  color: var(--ivory);
  box-shadow: 0 0 0 1px var(--terracotta);
}

.btn-primary:hover {
  background: var(--coral);
  color: var(--ivory);
  box-shadow: 0 0 0 1px var(--coral);
}

.btn-secondary {
  background: var(--warm-sand);
  color: var(--ink);
  box-shadow: 0 0 0 1px var(--ring-warm);
}

.btn-secondary:hover {
  background: var(--border-warm);
  color: var(--ink);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: 0 0 0 1px var(--border-warm);
}

.btn-ghost:hover {
  background: var(--warm-sand);
  color: var(--ink);
}

/* ---- About Section ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.about-text p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--olive-gray);
  margin-bottom: 1.25rem;
}

.about-text p:first-of-type {
  font-size: 1.125rem;
  color: var(--ink);
}

.about-photo {
  border-radius: 16px;
  overflow: hidden;
  background: var(--warm-sand);
  aspect-ratio: 4/5;
  border: 1px solid var(--border-cream);
}

.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---- Article Carousel ---- */
.carousel-wrapper {
  position: relative;
}

.carousel {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--ring-warm) transparent;
}

.carousel::-webkit-scrollbar {
  height: 6px;
}

.carousel::-webkit-scrollbar-track {
  background: transparent;
}

.carousel::-webkit-scrollbar-thumb {
  background: var(--ring-warm);
  border-radius: 3px;
}

.article-card {
  flex: 0 0 360px;
  scroll-snap-align: start;
  background: var(--ivory);
  border: 1px solid var(--border-cream);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--ring-warm);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.article-card-cover {
  height: 180px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.article-card-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(20, 20, 19, 0.5) 100%);
}

.article-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 0.75rem;
}

.article-card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.article-card-excerpt {
  font-size: 0.9375rem;
  color: var(--olive-gray);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex: 1;
}

.article-card-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.article-card-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--terracotta);
}

.article-card-links .linkedin-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--stone-gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-card-links .linkedin-link:hover {
  color: var(--terracotta);
}

.carousel-controls {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--warm-sand);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all 0.2s var(--ease);
  box-shadow: 0 0 0 1px var(--ring-warm);
}

.carousel-btn:hover {
  background: var(--border-warm);
}

.carousel-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

/* ---- Talks Grid ---- */
.talks-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (max-width: 640px) {
  .talks-grid {
    grid-template-columns: 1fr;
  }
}

.talk-card {
  background: var(--ivory);
  border: 1px solid var(--border-cream);
  border-radius: 12px;
  padding: 2rem;
  transition: border-color 0.2s var(--ease);
}

.talk-card:hover {
  border-color: var(--ring-warm);
}

.talk-card h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.talk-card p {
  font-size: 0.9375rem;
  color: var(--olive-gray);
  line-height: 1.6;
}

/* ---- Timeline ---- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--border-warm);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--terracotta);
  box-shadow: 0 0 0 4px var(--parchment);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--stone-gray);
  margin-bottom: 0.25rem;
}

.timeline-role {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--ink);
}

.timeline-company {
  font-size: 0.9375rem;
  color: var(--olive-gray);
}

/* ---- Contact ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 640px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.0625rem;
  color: var(--ink);
  font-weight: 500;
}

.contact-link:hover {
  color: var(--terracotta);
}

.contact-link span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--stone-gray);
}

.newsletter-note {
  background: var(--ivory);
  border: 1px solid var(--border-cream);
  border-radius: 12px;
  padding: 2rem;
}

.newsletter-note h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.newsletter-note p {
  font-size: 0.9375rem;
  color: var(--olive-gray);
  line-height: 1.6;
}

.newsletter-badge {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--terracotta);
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--border-warm);
  border-radius: 9999px;
}

/* ---- Footer ---- */
.footer {
  background: var(--near-black);
  color: var(--warm-silver);
  padding: 3rem 0 2rem;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--ivory);
  margin-bottom: 0.5rem;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--stone-gray);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--warm-silver);
}

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

/* ---- Scroll Reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.reveal-d1 { transition-delay: 0.06s; }
.reveal-d2 { transition-delay: 0.12s; }
.reveal-d3 { transition-delay: 0.18s; }
.reveal-d4 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  html {
    scroll-behavior: auto;
  }

  .hero-scroll {
    animation: none;
  }
}

/* ---- Article Pages ---- */
.article-header {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border-cream);
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--olive-gray);
  margin-bottom: 2rem;
}

.article-back:hover {
  color: var(--terracotta);
}

.article-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 1.5rem;
}

.article-meta {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--stone-gray);
}

.article-meta a {
  color: var(--terracotta);
}

.article-body {
  max-width: 680px;
  margin: 0 auto;
  padding: 3rem 0 5rem;
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--ink);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.article-body h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.article-body p {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--olive-gray);
  margin-bottom: 1.25rem;
}

.article-body strong {
  color: var(--ink);
  font-weight: 600;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-body li {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--olive-gray);
  margin-bottom: 0.5rem;
}

.article-body blockquote {
  border-left: 3px solid var(--terracotta);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.5;
}

.article-cover {
  width: 100%;
  max-width: 800px;
  margin: 0 auto 3rem;
  border-radius: 16px;
  overflow: hidden;
}

.article-cover img {
  width: 100%;
}

/* ---- Article Sources ---- */
.article-sources {
  max-width: 680px;
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border-cream);
}

.article-sources h2 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 1rem;
}

.article-sources ol {
  padding-left: 1.5rem;
  margin: 0;
}

.article-sources li {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--stone-gray);
  margin-bottom: 0.75rem;
  word-break: break-word;
}

.article-sources a {
  color: var(--terracotta);
  word-break: break-all;
}