:root {
  --color-bg:           #FAF9F6;
  --color-bg-surface:   #FFFFFF;
  --color-bg-raised:    #F4F1EB;
  --color-bg-muted:     #EEF0EE;
  --color-text:         #1C1917;
  --color-text-muted:   #6B7070;
  --color-accent:       #0F766E;
  --color-accent-dim:   #0A5C56;
  --color-border:       #E5E1D8;
  --color-border-accent: rgba(15, 118, 110, 0.22);
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  padding-top: 64px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 249, 246, 0.93);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.2s ease;
}

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

.nav-links a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg-surface);
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  }

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

  .nav-links a {
    font-size: 16px;
    text-align: center;
    display: block;
    padding: 0.5rem 0;
  }
}

/* ===== FOOTER ===== */
.footer {
  background: var(--color-bg-raised);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 1rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: var(--font-display);
  color: var(--color-text);
  font-size: 1.1rem;
}

.footer-copy {
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-muted);
}

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

.footer-links a {
  font-size: 13px;
  color: var(--color-text-muted);
  transition: all 0.2s ease;
}

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

@media (max-width: 768px) {
  .footer-inner {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

/* ===== TYPOGRAPHY ===== */
.section-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 600;
}

.accent-rule {
  display: block;
  width: 36px;
  height: 2px;
  background: var(--color-accent);
  margin: 0.75rem 0 1.5rem;
}

.prose {
  max-width: 680px;
  margin: 0 auto;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.625rem 1.4rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: var(--font-body);
  transition: all 0.2s ease;
  cursor: pointer;
  text-decoration: none;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-dim);
  transform: translateY(-1px);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.25);
}

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

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: transparent;
}

/* ===== HOME: HERO ===== */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  background: var(--color-bg);
  padding: var(--space-lg) var(--space-sm);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 20%, rgba(15, 118, 110, 0.05) 0%, transparent 55%),
    radial-gradient(ellipse at 20% 80%, rgba(15, 118, 110, 0.04) 0%, transparent 55%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero .section-label {
  display: block;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.75rem);
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 0;
}

.hero-tagline {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin: 1.25rem 0 0.6rem;
  font-style: italic;
  font-family: var(--font-display);
}

.hero-sub {
  font-size: 0.9875rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.scroll-indicator {
  animation: bounce-down 2s ease-in-out infinite;
  color: var(--color-text-muted);
  opacity: 0.45;
  font-size: 1.25rem;
  margin-top: 3rem;
  display: block;
  text-align: center;
}

/* ===== HOME: FEATURED ===== */
.featured-section {
  padding: var(--space-lg) var(--space-sm);
  background: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
}

.featured-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 760px;
  margin: 0 auto;
  transition: all 0.25s ease;
}

.featured-card:hover {
  border-color: var(--color-border-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.07);
}

.featured-card-image {
  width: 100%;
  height: 240px;
  background: var(--color-bg-muted);
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: flex-start;
  padding: 1rem;
}

.featured-card-month {
  font-size: 11px;
  font-weight: 600;
  color: #FAF9F6;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(0, 0, 0, 0.45);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
}

.featured-card-body {
  padding: 1.75rem 2rem;
}

.featured-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.featured-title {
  font-family: var(--font-display);
  font-size: 1.65rem;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.featured-teaser {
  font-size: 0.9875rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin: 0.75rem 0 1.5rem;
}

/* ===== HOME: ABOUT STRIP ===== */
.about-strip {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) var(--space-sm);
}

.about-strip-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}

.about-strip-text p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.interest-list {
  border-left: 2px solid var(--color-border);
  padding-left: 1.5rem;
}

.interest-list h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.85rem;
}

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

.interest-list li {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--color-border);
}

.interest-list li:last-child {
  border-bottom: none;
}

@media (max-width: 768px) {
  .about-strip-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ===== PAGE HEADER ===== */
.page-header {
  padding: 4rem 0 2.5rem;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.page-header-sub {
  font-size: 1rem;
  color: var(--color-text-muted);
}

/* ===== POSTS GRID ===== */
.posts-main {
  padding: 0 var(--space-sm) var(--space-lg);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.post-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.2s ease;
}

.post-card:not(.post-card--upcoming):hover {
  border-color: var(--color-border-accent);
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.07);
}

.post-card--upcoming {
  opacity: 0.45;
  pointer-events: none;
}

.post-card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.post-card-image {
  height: 170px;
  background: var(--color-bg-muted);
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 1rem;
}

.post-card-month {
  font-size: 11px;
  font-weight: 600;
  color: #FAF9F6;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(0, 0, 0, 0.45);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.post-card-body {
  padding: 1.25rem 1.4rem;
}

.post-card-tags {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-bottom: 0.25rem;
}

.post-card-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--color-text);
  margin: 0.65rem 0 0.45rem;
  letter-spacing: -0.01em;
}

.post-card-teaser {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.post-card-cta {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  transition: all 0.2s ease;
}

.upcoming-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin-bottom: 0.5rem;
}

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

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

/* ===== POST PAGE ===== */
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin: 2rem 0 2.5rem;
  transition: all 0.2s ease;
}

.post-back:hover {
  color: var(--color-accent);
}

.post-header {
  max-width: 720px;
  margin: 0 auto 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-border);
}

.post-header-meta {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.post-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.25;
  color: var(--color-text);
  margin: 1rem 0;
  letter-spacing: -0.02em;
}

.post-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.post-byline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 2rem;
}

.post-byline-dot {
  color: var(--color-border);
}

.post-paper-credit {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-top: 1.5rem;
}

.post-paper-title {
  font-style: italic;
  color: var(--color-text);
  margin: 0.3rem 0 0.2rem;
}

.post-paper-authors {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.post-body {
  max-width: 680px;
  margin: 0 auto;
}

.post-section {
  margin-bottom: 3rem;
}

.post-section h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  color: var(--color-text);
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

.post-section p {
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text);
}

.post-section ul {
  margin: 1rem 0 1.25rem 1.25rem;
}

.post-section li {
  margin-bottom: 0.75rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
}

.post-section strong {
  color: var(--color-text);
  font-weight: 600;
}

.post-mytake {
  background: #F0F7F6;
  border-radius: var(--radius-lg);
  padding: 2rem 2.25rem;
  border: 1px solid rgba(15, 118, 110, 0.15);
  border-left: 3px solid var(--color-accent);
}

.post-mytake h2 {
  color: var(--color-accent);
}

.post-citation {
  background: var(--color-bg-raised);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  font-family: monospace;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.post-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 3rem 0 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.post-nav-empty {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--color-accent);
  z-index: 200;
  transition: width 0.1s linear;
}

/* ===== ABOUT PAGE ===== */
.about-content {
  max-width: 720px;
  margin: 0 auto;
}

.about-block {
  margin-bottom: 3.5rem;
}

.about-block h2 {
  font-family: var(--font-display);
  font-size: 1.55rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.about-block p {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

.interests-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.interest-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.4rem;
  transition: border-color 0.2s ease;
}

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

.interest-card h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.4rem;
}

.interest-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 0;
}

.contact-links {
  margin-top: 1.25rem;
  display: flex;
  gap: 1rem;
}

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

.hidden-link {
  position: fixed;
  top: 68px;
  right: 16px;
  width: 24px;
  height: 24px;
  z-index: 99;
  opacity: 0;
  cursor: default;
}

.hidden-link:focus {
  opacity: 0;
}

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

/* ===== UTILITIES ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.tag {
  font-size: 11px;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--color-accent);
  font-weight: 500;
  display: inline-block;
}

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

@keyframes bounce-down {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(6px); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: clamp(2.2rem, 8vw, 3rem);
  }

  .hero-tagline {
    font-size: 1.05rem;
  }

  .featured-title {
    font-size: 1.35rem;
  }

  .page-header h1 {
    font-size: 2rem;
  }

  .post-mytake {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero {
    min-height: 82vh;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .featured-card-body {
    padding: 1.25rem;
  }

  .post-body {
    padding: 0 0.1rem;
  }
}