/* AI Matcha Farm — essay + log */

:root {
  --washi: #f4f1ea;
  --ink: #000;
  --sumi: var(--ink);
  --sumi-soft: var(--ink);
  --sumi-faint: var(--ink);
  --matcha: var(--ink);
  --line: rgba(0, 0, 0, 0.12);

  --content: min(52rem, 94vw);
  --font: Georgia, "Times New Roman", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 15px;
  font-weight: 400;
  line-height: 2;
  letter-spacing: 0.04em;
  color: var(--sumi-soft);
  background: var(--washi);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: var(--sumi); text-decoration: none; }
a:hover { color: var(--ink); }
.log-body a { text-decoration: underline; text-underline-offset: 4px; }
em { font-style: italic; color: var(--sumi); }
strong { font-weight: 600; color: var(--sumi); }

.page {
  width: 100%;
  max-width: var(--content);
  margin: 0 auto;
  padding: 24px clamp(20px, 4vw, 48px) 80px;
}

.site-head {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-bottom: 40px;
  padding: 12px 0 20px;
  background: var(--washi);
  border-bottom: 1px solid var(--line);
}
.site-title {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--sumi-faint);
  text-align: center;
}
.site-nav {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: 12px 24px;
  width: 100%;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}
.site-nav a {
  white-space: nowrap;
}
@media (min-width: 720px) {
  .site-head {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
  }
  .site-title {
    text-align: left;
    flex-shrink: 0;
  }
  .site-nav {
    width: auto;
    justify-content: flex-end;
  }
}
.site-nav a[aria-current="page"] {
  color: var(--matcha);
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-color: var(--line);
}
@media (max-width: 719px) {
  .page {
    padding-top: 16px;
  }
  .site-head {
    gap: 12px;
    margin-bottom: 28px;
    margin-left: calc(-1 * clamp(20px, 4vw, 48px));
    margin-right: calc(-1 * clamp(20px, 4vw, 48px));
    padding:
      max(8px, env(safe-area-inset-top, 0px))
      clamp(20px, 4vw, 48px)
      14px;
    border-bottom-color: rgba(42, 42, 40, 0.18);
    box-shadow: 0 1px 0 rgba(244, 241, 234, 0.9);
  }
  .site-title {
    letter-spacing: 0.2em;
    font-size: 0.65rem;
  }
  .site-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    width: 100%;
    max-width: 100%;
    padding: 2px;
    border: 1px solid var(--line);
    background: rgba(42, 42, 40, 0.04);
    font-size: clamp(0.64rem, 2.9vw, 0.74rem);
    letter-spacing: 0.06em;
  }
  .site-nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 4px;
    text-align: center;
    white-space: nowrap;
    border-right: 1px solid var(--line);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: background 0.15s ease, color 0.15s ease;
  }
  .site-nav a:last-child {
    border-right: none;
  }
  .site-nav a:active {
    background: rgba(42, 42, 40, 0.06);
  }
  .site-nav a[aria-current="page"] {
    background: var(--washi);
    color: var(--matcha);
    text-decoration: none;
    box-shadow: inset 0 0 0 1px rgba(42, 42, 40, 0.08);
  }
}

.hero {
  margin-bottom: 40px;
}
.hero-figure { margin: 0 0 28px; }
.hero-caption {
  margin: 12px 0 0;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--sumi-faint);
  text-align: center;
  line-height: 1.7;
}
.hero-caption-note {
  display: block;
  margin-top: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  line-height: 1.65;
  max-width: 28em;
  margin-left: auto;
  margin-right: auto;
}
.hero-photo {
  width: 100%;
  max-height: min(52vh, 480px);
  object-fit: cover;
  filter: saturate(0.92) contrast(0.98);
}
@media (min-width: 900px) {
  .hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(32px, 4vw, 56px);
    align-items: center;
  }
  .hero-figure { margin-bottom: 0; }
  .hero-lead {
    margin: 0;
    text-align: left;
    align-self: center;
  }
}
.hero-lead {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--sumi-soft);
  text-align: center;
}

.site-title a {
  color: inherit;
}
.site-title a:hover {
  color: var(--ink);
}

/* Essay */
.essay {
  padding-bottom: 48px;
}
.essay p {
  margin: 0 0 1.5em;
  text-indent: 0;
}
.essay p:last-child { margin-bottom: 0; }
.essay h2 {
  margin: 2.5em 0 1em;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--sumi-faint);
  text-transform: uppercase;
}
.essay h2:first-of-type { margin-top: 2em; }

.quiet {
  font-size: 0.8rem;
  color: var(--sumi-faint);
}
.quiet a {
  color: var(--sumi-faint);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--line);
}

.research-title {
  margin: 0 0 1.2em;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--sumi);
  text-transform: none;
}
.essay h3 {
  margin: 1.8em 0 0.6em;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--sumi);
  text-transform: uppercase;
}

/* Log */
.log-section {
  padding-top: 48px;
}
.log-heading {
  margin: 0 0 8px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--sumi-faint);
  text-transform: uppercase;
}
.log-intro {
  margin: 0 0 40px;
  font-size: 0.9rem;
  color: var(--sumi-faint);
}

.arrival-notice {
  margin: 0 0 40px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  color: var(--sumi-faint);
  line-height: 1.7;
}

.log-photos {
  margin-top: 2em;
  padding-top: 1.5em;
  border-top: 1px solid var(--line);
}
.log-photos-empty {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--sumi-faint);
  font-style: italic;
}
.log-photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.log-photo {
  margin: 0;
}
.log-photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.92) contrast(0.98);
}
.log-photo figcaption {
  margin-top: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--sumi-faint);
  line-height: 1.6;
}

.log-entry {
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.log-date {
  display: block;
  margin-bottom: 16px;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--matcha);
}
.log-body h3 {
  margin: 0 0 1em;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--sumi);
}
.log-body h4 {
  margin: 1.8em 0 0.6em;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--sumi-faint);
  text-transform: uppercase;
}
.log-body p {
  margin: 0 0 1.2em;
}
.log-list {
  margin: 0 0 1em;
  padding: 0;
  list-style: none;
}
.log-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  line-height: 1.7;
}
.log-list li:last-child { border-bottom: none; }

.conditions {
  margin: 1.5em 0 3em;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border: 1px solid var(--line);
}
.conditions li {
  display: grid;
  grid-template-columns: 7.5em 1fr;
  gap: 12px 20px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  line-height: 1.65;
}
.conditions li:last-child { border-bottom: none; }
.conditions strong {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sumi-faint);
}
@media (max-width: 520px) {
  .conditions li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}
.log-total {
  margin: 0.5em 0 0 !important;
  font-size: 0.88rem;
  color: var(--sumi-faint);
}
.log-total-all {
  margin-top: 1.5em !important;
  color: var(--sumi) !important;
}

.foot {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  text-align: center;
}
.foot p {
  margin: 20px 0 0;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--sumi-faint);
}
.foot-contact {
  letter-spacing: 0.06em;
  line-height: 1.8;
}
.foot-contact a {
  color: var(--sumi-soft);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--line);
}
.foot-contact a:hover {
  color: var(--ink);
}

.pixel-plant {
  width: 40px;
  height: 50px;
  margin: 0 auto;
  opacity: 0.7;
}
.pixel-plant-svg {
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
}
.plant-grow {
  transform-origin: 8px 16px;
  transform: scaleY(0);
  animation: grow 3s steps(5) forwards;
  animation-delay: 0.6s;
}
@keyframes grow {
  to { transform: scaleY(1); }
}

@media (min-width: 640px) {
  .page { padding: 32px 32px 96px; }
}