/* Base */
:root {
  --color-text: #252c29;
  --color-text-on-dark: #f7efd9;
  --color-border-frame: #716b51;
  --color-accent: #3c5045;
  --color-link: #244c42;
  --color-form-text: #252c29;
  --color-error-border: #9f2020;
  --color-error-text: #761515;
  --background-outermost: #172522; /* 最背面 */
  --background-header-footer: #101d1b; /* ヘッダーとフッター */
  --background-main: #1d302a; /* メインコンテンツ領域 */
  --background-card: #f8efd9; /* カード */
  --background-section-label: #dce3b9; /* セクション見出し */
  --background-text-link: #e9d8bd; /* Top pageのテキストリンク */
  --background-image-trigger: transparent; /* Blog画像の拡大ボタン */
  --background-lightbox: #fffdf5; /* Blog画像のlightbox本体 */
  --background-lightbox-backdrop: rgb(0 0 0 / 75%); /* Blog画像のlightbox背面 */
  --background-lightbox-close: #e9d8bd; /* Blog画像のlightbox閉じるボタン */
  --background-pagination-current: #244c42; /* Blogの選択中ページ */
  --background-required-label: #244c42; /* Contactの必須ラベル */
  --background-form-field: #fffdf5; /* Contactの入力欄 */
  --background-form-error: #fff0ed; /* Contactのエラー表示 */
  --background-contact-button: #244c42; /* Contactの主要ボタン */
  --background-contact-button-secondary: #e9d8bd; /* Contactの副ボタン */
  --background-mobile-menu: #f8efd9; /* mobile menu */
  --color-paper-border: #b2a486;
  --color-rule: #c7bca0;
  --font-literary: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif CJK JP", serif;
  --shadow-paper: 0 2px 3px rgb(0 0 0 / 15%), 0 12px 24px rgb(0 0 0 / 22%);
  color: var(--color-text-on-dark);
  background: var(--background-outermost);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK JP", sans-serif;
  line-height: 1.8;
}

* {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
}

a {
  color: inherit;
  text-underline-offset: 0.25em;
  text-decoration-thickness: 1px;
}

:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 4px;
}

::selection {
  color: #fffdf5;
  background: #244c42;
}

/* Shared layout */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 5rem;
  margin: 0 auto;
  padding: 0.75rem max(1.5rem, calc((100% - 64rem) / 2));
  border-bottom: 1px solid var(--color-border-frame);
  background: var(--background-header-footer);
  box-shadow: 0 4px 16px rgb(0 0 0 / 18%);
  position: relative;
  z-index: 2;
}

.site-title {
  font-family: var(--font-literary);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.75rem;
}

.breadcrumbs a {
  text-decoration: none;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: block;
  padding-block: 0.5rem;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

.mobile-menu {
  display: none;
}

.page-layout {
  flex: 1 0 auto;
  width: 100%;
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 3rem) max(1.25rem, calc((100% - 80rem) / 2)) clamp(2.5rem, 6vw, 5rem);
  background:
    radial-gradient(ellipse at 50% 0, rgb(160 153 103 / 13%), transparent 65%),
    linear-gradient(90deg, rgb(0 0 0 / 12%), transparent 25%, transparent 75%, rgb(0 0 0 / 12%)),
    var(--background-main);
}

.blog-page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 15rem;
  align-items: start;
  gap: 1.5rem;
}

.blog-page-content,
.top-page-content {
  width: 100%;
  max-width: 64rem;
  margin-inline: auto;
}

.main-column {
  display: grid;
  gap: 2rem;
  min-width: 0;
}

.note {
  color: var(--color-text);
  padding: clamp(1rem, 3vw, 2rem);
  border: 1px solid var(--color-paper-border);
  background:
    linear-gradient(to bottom, rgb(171 143 80 / 10%), transparent 3rem),
    var(--background-card);
  box-shadow: var(--shadow-paper);
  border-radius: 1px 1px 8px 1px;
  overflow-wrap: anywhere;
}

.note a {
  color: var(--color-link);
}

.note a:hover {
  text-decoration-thickness: 2px;
}

.work h3,
.profile-name,
.blog-index > h1,
.blog-article h1,
.blog-article-body h2,
.blog-article-body h3,
.form-title,
.contact-complete h1 {
  font-family: var(--font-literary);
  font-weight: 700;
  line-height: 1.6;
  text-wrap: balance;
}

/* Top page */
.hero-image {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--color-paper-border);
  padding: clamp(0.3rem, 0.8vw, 0.55rem);
  background: var(--background-card);
  box-shadow: 0 4px 6px rgb(0 0 0 / 18%), 0 20px 36px rgb(0 0 0 / 30%);
}

.announcement {
  display: flex;
  align-items: baseline;
  gap: 2rem;
  padding-block: 1rem;
  border-left: 4px solid #8c653c;
}

.announcement h2,
.announcement p {
  margin: 0;
}

.announcement h2 {
  color: #644523;
  font-size: 0.95rem;
  white-space: nowrap;
}

.content-group {
  display: grid;
  gap: 0.75rem;
}

.section-label {
  color: var(--color-text);
  width: fit-content;
  margin: 0 0 -1.1rem 0.85rem;
  padding: 0.4rem 1.4rem;
  border: 1px solid #9ca57d;
  background: linear-gradient(180deg, rgb(255 255 255 / 22%), transparent 55%), var(--background-section-label);
  box-shadow: 1px 3px 4px rgb(0 0 0 / 20%);
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  transform: rotate(-2deg);
  z-index: 1;
}

.work {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  align-items: start;
  gap: 2rem;
  padding-block: 2rem;
}

.work h3,
.work p {
  margin-block: 1rem;
}

.work h3 {
  margin-top: 0;
  margin-bottom: 1.25rem;
  font-size: clamp(1.3rem, 2.3vw, 1.65rem);
}

.work > div > p:not(.text-links) {
  line-height: 2;
}

.work-thumbnail {
  display: block;
  width: 100%;
  height: auto;
  padding: 0.4rem;
  border: 1px solid var(--color-paper-border);
  background: #fffdf5;
  box-shadow: 2px 4px 7px rgb(56 47 28 / 16%);
}

.text-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  font-size: 0.9rem;
}

.text-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.5rem 1rem;
  border: 1px solid currentColor;
  color: var(--color-link);
  background: var(--background-text-link);
  text-decoration: none;
  box-shadow: 1px 2px 0 rgb(60 80 69 / 20%);
}

.text-links a,
.button-link,
.contact-button {
  transition: transform 160ms ease, box-shadow 160ms ease;
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .text-links a:hover,
  .button-link:hover,
  .contact-button:hover {
    transform: translateY(-2px);
    box-shadow: 2px 5px 0 rgb(60 80 69 / 20%);
  }
}

.latest-posts ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.latest-posts li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--color-rule);
}

.latest-posts time {
  color: var(--color-accent);
  font-size: 0.85rem;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.external-links {
  padding-block: 1rem;
}

.external-links p {
  margin: 0;
}

.bottom-info {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.bottom-info .content-group {
  grid-template-rows: auto 1fr;
}

.bottom-info-note {
  padding: 1.5rem;
}

.bottom-info-note ul {
  padding-left: 1.25rem;
}

.profile-name {
  margin: 0 0 0.35rem;
  font-size: 1.4rem;
  font-weight: 650;
}

.profile-description {
  margin: 0;
}

.button-link {
  display: block;
  padding: 0.65rem;
  border: 1px solid var(--color-accent);
  text-align: center;
  text-decoration: none;
  background: var(--background-text-link);
  box-shadow: 1px 2px 0 rgb(60 80 69 / 20%);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 4rem;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  border-top: 1px solid var(--color-border-frame);
  background: var(--background-header-footer);
  text-align: center;
  letter-spacing: 0.08em;
}

/* Blog */
.blog-index > h1,
.blog-article > h1 {
  margin-top: 0;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-rule);
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.blog-article-body {
  max-width: 40em;
  line-height: 2;
}

.blog-article-body p {
  margin-block: 1.5em;
}

.blog-sidebar h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.category-list {
  margin: 0;
  padding-left: 1.25rem;
}

.category-list a {
  display: inline-block;
  padding-block: 0.35rem;
}

.blog-preview-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.blog-preview-header h2 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.blog-preview-header time,
.blog-article > time {
  color: var(--color-accent);
  font-size: 0.85rem;
  white-space: nowrap;
}

.blog-preview-body {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: center;
  gap: 1.5rem;
}

.blog-preview-body-no-thumbnail {
  grid-template-columns: 1fr;
}

.blog-preview-body > p {
  max-width: 40em;
}

.blog-thumbnail-link {
  color: inherit;
  text-decoration: none;
}

.blog-thumbnail,
.blog-article img {
  display: block;
  max-width: 100%;
  height: auto;
}

.image-lightbox-trigger {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: var(--background-image-trigger);
  cursor: zoom-in;
  text-align: left;
}

.image-lightbox:not([open]) {
  display: none;
}

.image-lightbox {
  max-width: min(90vw, 80rem);
  max-height: 90vh;
  padding: 3rem 1rem 1rem;
  border: 1px solid var(--color-accent);
  background: var(--background-lightbox);
}

.image-lightbox::backdrop {
  background: var(--background-lightbox-backdrop);
}

.image-lightbox-image {
  max-width: 100%;
  max-height: 80vh;
  width: auto;
  height: auto;
}

.image-lightbox-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--color-accent);
  color: var(--color-link);
  background: var(--background-lightbox-close);
  cursor: pointer;
}

.blog-index hr {
  margin-block: 2rem;
  border: 0;
  border-top: 1px solid var(--color-rule);
}

.blog-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.blog-pagination-count {
  margin: 0;
}

.blog-pagination-pages {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.blog-pagination-pages a {
  display: grid;
  min-width: 2.75rem;
  min-height: 2.75rem;
  place-items: center;
  border: 1px solid var(--color-accent);
  text-decoration: none;
}

.blog-pagination-pages a:hover,
.blog-pagination-pages a:focus-visible,
.blog-pagination-pages a[aria-current="page"] {
  color: var(--background-card);
  background: var(--background-pagination-current);
}

.blog-article > time {
  display: block;
  margin-bottom: 2rem;
}

/* Contact */
.contact-layout {
  min-height: calc(100vh - 9rem);
}

.contact-page {
  max-width: 48rem;
  width: 100%;
  margin: 0 auto;
}

.contact-header nav a {
  text-underline-offset: 0.3em;
}

.form-title,
.contact-complete h1 {
  margin-top: 0;
}

.form-description {
  margin-bottom: 2rem;
}

.contact-form,
.form-field {
  display: grid;
  gap: 0.5rem;
}

.contact-form {
  gap: 1.5rem;
}

.form-field label {
  font-weight: 650;
}

.required-label {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.05rem 0.4rem;
  color: var(--background-card);
  background: var(--background-required-label);
  font-size: 0.75rem;
  font-weight: 500;
}

.form-field input,
.form-field textarea {
  max-width: 100%;
  padding: 0.7rem;
  border: 1px solid var(--color-accent);
  border-radius: 0;
  color: var(--color-form-text);
  background: var(--background-form-field);
  font: inherit;
}

.form-field textarea {
  min-height: 12rem;
  resize: vertical;
}

.form-field input:focus-visible,
.form-field textarea:focus-visible,
.contact-button:focus-visible {
  outline: 3px solid var(--color-link);
  outline-offset: 2px;
}

.form-field [aria-invalid="true"] {
  border-width: 2px;
  border-color: var(--color-error-border);
}

.field-error {
  margin: 0;
  color: var(--color-error-text);
}

.form-error {
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-error-border);
  color: var(--color-error-text);
  background: var(--background-form-error);
}

.form-error p,
.form-error ul {
  margin-block: 0.25rem;
}

.contact-honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.confirm-list {
  margin: 2rem 0 0;
}

.confirm-list > div {
  display: grid;
  grid-template-columns: minmax(7rem, 10rem) minmax(0, 1fr);
  border-bottom: 1px solid var(--color-accent);
}

.confirm-list dt,
.confirm-list dd {
  margin: 0;
  padding: 0.8rem;
  overflow-wrap: anywhere;
}

.confirm-list dt {
  font-weight: 650;
}

.confirm-message {
  white-space: normal;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.contact-button {
  min-height: 2.75rem;
  padding: 0.65rem 1.5rem;
  border: 1px solid var(--color-accent);
  color: var(--color-text-on-dark);
  background: var(--background-contact-button);
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

.contact-button-secondary {
  color: var(--color-accent);
  background: var(--background-contact-button-secondary);
}

.contact-submit {
  width: 100%;
}

.contact-complete {
  padding-block: clamp(2rem, 8vw, 5rem);
  text-align: center;
}

.contact-complete .button-link {
  max-width: 24rem;
  margin: 2rem auto 0;
}

/* Responsive */
@media (max-width: 48rem) {
  .site-header {
    align-items: flex-start;
    gap: 1rem;
  }

  .site-nav {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.4rem 1rem;
  }

  .blog-page-layout {
    grid-template-columns: minmax(0, 1fr) 11rem;
    gap: 1rem;
  }

  .blog-sidebar {
    padding: 1rem;
  }

  .bottom-info {
    grid-template-columns: minmax(0, 1fr);
  }

  .announcement {
    display: block;
  }

  .announcement h2 {
    margin-bottom: 0.5rem;
  }

  .work {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .blog-preview-body {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .latest-posts li {
    display: block;
  }

  .latest-posts time {
    display: block;
  }

}

@media (max-width: 34rem) {
  .site-header {
    position: relative;
    align-items: center;
    padding-inline: 1rem;
  }

  .site-title {
    font-size: 0.95rem;
    letter-spacing: 0.04em;
  }

  .breadcrumbs {
    gap: 0.4rem;
  }

  .breadcrumbs li + li::before {
    margin-right: 0.4rem;
  }

  .site-header > .desktop-navigation {
    display: none;
  }

  .mobile-menu {
    display: block;
    flex-shrink: 0;
    text-align: right;
  }

  .blog-page-layout {
    grid-template-columns: 1fr;
  }

  .blog-page-layout .blog-sidebar {
    display: none;
  }

  .mobile-menu summary {
    padding: 0.5rem;
    border: 1px solid var(--color-border-frame);
    cursor: pointer;
  }

  .mobile-menu ul {
    position: absolute;
    right: 1rem;
    margin: 0.5rem 0 0;
    padding: 0.75rem 1rem;
    min-width: 12rem;
    max-width: calc(100vw - 2rem);
    border: 1px solid var(--color-paper-border);
    color: var(--color-link);
    background: var(--background-mobile-menu);
    list-style: none;
    text-align: left;
    box-shadow: var(--shadow-paper);
  }

  .mobile-menu li + li {
    border-top: 1px solid var(--color-rule);
  }

  .mobile-menu a {
    display: block;
    padding: 0.6rem 0.25rem;
    font-size: 1rem;
  }

  .bottom-info {
    grid-template-columns: minmax(0, 1fr);
  }

  .blog-preview-header {
    display: block;
  }

  .confirm-list > div {
    grid-template-columns: 1fr;
  }

  .confirm-list dt {
    padding-bottom: 0;
  }

  .form-actions {
    display: grid;
  }

  .contact-button {
    width: 100%;
  }
}