:root {
  --bg: #f4f4f2;
  --text: #121212;
  --muted: #6c6c6c;
  --border: #e3e3e3;
  --max: 1100px;
}

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

body {
  font-family: "Inter", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  letter-spacing: -0.01em;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 36px;
}

.nav-container {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg);
  width: 100%;
}

.nav-container .container {
  padding-top: 32px;
  padding-bottom: 0px;
}

.nav-scrolled {
  border-bottom: 1px solid var(--border);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid var(--text);
  padding-bottom: 20px;
}

.logo-container {
  display: flex;
  align-items: center;
}

.logo-link {
  text-decoration: none;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-logo {
  height: 32px;
  width: auto;
  filter: grayscale(0.2) contrast(1.1);
}

.logo-mark {
  font-weight: 500;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  font-size: 14px;
  line-height: 1;
}
.hero {
  padding: 80px 0 100px;
  border-top: none;
  max-width: 780px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 1.2s ease forwards;
}

.hero h1 {
  font-size: 56px;
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 40px;
}

.hero p {
  font-size: 30px;
  color: var(--muted);
  max-width: 640px;
}

.page-header {
  padding: 80px 0 100px;
  max-width: 780px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 1.2s ease forwards;
}

section {
  padding: 100px 0;
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 1s ease,
    transform 1s ease;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

h2 {
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 70px;
}

.statement {
  font-size: 28px;
  max-width: 700px;
  line-height: 1.35;
  margin-bottom: 24px;
}

.small {
  font-size: 15px;
  color: var(--muted);
  max-width: 580px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 100px;
}

.diagram {
  background: white;
  border: 1px solid var(--border);
  padding: 60px 20px;
  display: flex;
  justify-content: center;
  overflow: hidden;
}

.engage {
  font-size: 18px;
  margin-top: 40px;
}

.index-box {
  border: 1px solid var(--border);
  padding: 80px;
  background: white;
}

.index-title {
  font-size: 22px;
  margin-bottom: 20px;
}

.index-link {
  margin-top: 20px;
  display: inline-block;
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--text);
}

footer {
  border-top: 1px solid var(--border);
  padding-top: 60px;
  padding-bottom: 60px;
  font-size: 12px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 38px;
  }
  .container {
    padding: 60px 24px;
  }
  .grid {
    gap: 40px;
  }
  .index-box {
    padding: 40px;
  }
}

.archive-category {
  margin-bottom: 100px;
}

.category-title {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 40px;
}

.archive-item {
  margin-bottom: 50px;
  max-width: 720px;
}

.archive-title {
  font-size: 22px;
  margin-bottom: 8px;
  color: var(--text);
  text-decoration: none;
  display: inline-block;
  transition: opacity 0.3s ease;
}

a.archive-title:hover {
  opacity: 0.7;
}

.archive-summary {
  font-size: 15px;
  color: var(--muted);
}

/* --- Essay Page Styles --- */

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

.essay-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 40px;
}

.essay-pillar {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}

.essay-title {
  display: block;
  font-family: "Playfair Display", serif;
  font-size: 42px;
  line-height: 1.2;
  font-weight: 400;
  margin-bottom: 32px;
}

.essay-subtitle {
  display: block;
  font-size: 20px;
  color: var(--muted);
  line-height: 1.4;

  border-bottom: 1px dashed var(--muted);
  padding-bottom: 32px;
}

.essay-meta {
  font-size: 12px;
  color: var(--muted);
  font-family: monospace;
  margin-bottom: 24px;
}

.essay-body {
  font-size: 18px;
  line-height: 1.7;
  text-align: justify;
}

.essay-body p {
  margin-bottom: 32px;
}

.essay-body h2 {
  font-size: 24px;
  letter-spacing: normal;
  text-transform: none;
  color: var(--text);
  margin-top: 60px;
  margin-bottom: 24px;
}

.essay-body strong {
  font-weight: 600;
}

.essay-body a {
  color: var(--text);
  text-decoration-color: var(--muted);
  text-underline-offset: 4px;
  transition: all 0.2s ease;
}

.essay-body a:hover {
  text-decoration-color: var(--text);
}

.header-nav {
  display: flex;
  gap: 24px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

main.container {
  padding-top: 80px;
  padding-bottom: 120px;
}

footer .container {
  padding-top: 80px;
  padding-bottom: 60px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.nav-links li a {
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color 0.3s ease;
}

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

.header-meta {
  font-size: 13px;
  color: var(--muted);
}

/* --- Engagement Brief Form Styles --- */

#brief-section {
  max-width: 760px;
  background: #fff;
  border: 1px solid var(--text);
  padding: 80px;
  margin-top: 60px;
}

.brief-q {
  margin-bottom: 60px;
  max-width: 620px;
}

.brief-q span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.brief-q label {
  display: block;
  font-family: "Playfair Display", serif;
  font-size: 20px;
  color: var(--text);
  margin-bottom: 20px;
  line-height: 1.3;
}

.brief-q textarea,
.brief-q input[type="text"],
.brief-q input[type="email"] {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  font-family: "Inter", sans-serif;
  font-size: 15px;
  color: var(--text);
  padding: 8px 0;
  resize: vertical;
  transition: border-color 0.3s ease;
}

.brief-q textarea {
  min-height: 40px;
}

.brief-q textarea::placeholder,
.brief-q input[type="text"]::placeholder,
.brief-q input[type="email"]::placeholder {
  color: #a0a0a0;
  font-style: italic;
}

.brief-q textarea:focus,
.brief-q input[type="text"]:focus,
.brief-q input[type="email"]:focus {
  outline: none;
  border-bottom-color: var(--text);
}

.submit-btn {
  background: var(--text);
  color: var(--bg);
  border: none;
  padding: 16px 32px;
  font-family: inherit;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s ease;
  margin-top: 20px;
}

.submit-btn:hover {
  background: #333;
}

@media (max-width: 768px) {
  #brief-section {
    padding: 40px 24px;
  }

  .brief-q > div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }
}