/* ============================================================
   デザイントークン（portfolio準拠）
   ============================================================ */
:root {
  --color-bg:       #F0EDE5;
  --color-text:     #4A4A4A;
  --color-accent-1: #A2B29F;
  --color-accent-2: #B39FA1;
  --color-accent-3: #8191A0;
  --color-surface:  #E8E4DB;
  --color-border:   #D5D0C7;

  --font-main: 'Zen Kaku Gothic New', sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.5rem;
  --text-2xl:  2rem;
  --text-3xl:  3rem;

  --weight-light:  300;
  --weight-normal: 400;
  --weight-bold:   700;

  --leading-tight: 1.4;
  --leading-body:  1.8;
  --leading-loose: 2.0;

  --max-width:   960px;
  --section-py:  6rem;
  --section-gap: 4rem;
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;

  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2.5rem;
}

/* ============================================================
   リセット・ベース
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: var(--leading-body);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--color-accent-1);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ============================================================
   ユーティリティ
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 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: 0;
}

.section-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  letter-spacing: 0.1em;
  margin-bottom: var(--section-gap);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 2rem;
  height: 2px;
  background-color: var(--color-accent-1);
  margin-top: 0.5rem;
}

/* ============================================================
   ナビゲーション
   ============================================================ */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(240, 237, 229, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 1rem 1.5rem;
}

.nav-logo {
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  letter-spacing: 0.2em;
  transition: color 0.2s ease;
}

.nav-logo:hover {
  color: var(--color-accent-1);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  position: relative;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent-1);
  transition: width 0.2s ease;
}

.nav-links a:hover {
  color: var(--color-accent-1);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ============================================================
   Hero
   ============================================================ */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
  background-color: var(--color-border);
}

.hero-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-scroll {
  position: relative;
  z-index: 1;
  margin-bottom: 2.5rem;
  color: #fff;
  opacity: 0.85;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.5));
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.hero-scroll:hover {
  opacity: 1;
  transform: translateY(4px);
}

/* ============================================================
   About
   ============================================================ */
#about {
  padding-block: var(--section-py);
  background-color: var(--color-surface);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--section-gap);
}

.about-avatar {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  overflow: hidden;
  margin-inline: auto;
  border: 3px solid var(--color-bg);
}

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

.about-intro {
  line-height: var(--leading-loose);
  margin-bottom: 2rem;
}

.about-intro p + p {
  margin-top: 0.5rem;
}

.sns-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  position: relative;
  transition: color 0.2s ease;
  margin-right: 1.5rem;
}

.sns-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent-2);
  transition: width 0.2s ease;
}

.sns-link:hover {
  color: var(--color-accent-2);
}

.sns-link:hover::after {
  width: 100%;
}

/* ============================================================
   Gallery
   ============================================================ */
#gallery {
  padding-block: var(--section-py);
  background-color: var(--color-bg);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.gallery-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--color-border);
  cursor: pointer;
}

.gallery-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-card:hover img {
  transform: scale(1.04);
}

.gallery-card__overlay {
  position: absolute;
  inset: auto 0 0 0;
  padding: 0.75rem 0.9rem;
  background: linear-gradient(to top, rgba(74, 74, 74, 0.65), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.gallery-card:hover .gallery-card__overlay,
.gallery-card:focus-visible .gallery-card__overlay {
  opacity: 1;
}

.gallery-card__caption {
  color: #fff;
  font-size: var(--text-sm);
}

.gallery-card__category {
  display: inline-block;
  font-size: var(--text-xs);
  color: #fff;
  opacity: 0.85;
  margin-top: 0.15rem;
}

.gallery-empty {
  grid-column: 1 / -1;
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text);
  opacity: 0.6;
  padding: 2rem;
}

.gallery-more {
  text-align: center;
  margin-top: 2rem;
}

.gallery-more__link {
  display: inline-block;
  font-size: 0.95rem;
  color: var(--color-accent-3);
  text-decoration: none;
  transition: color 0.2s;
}

.gallery-more__link:hover {
  color: var(--color-text);
  text-decoration: underline;
}

/* ── ライトボックス ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.lightbox.is-open {
  display: flex;
}

.lightbox-overlay {
  position: absolute;
  inset: 0;
  background: rgba(74, 74, 74, 0.85);
}

.lightbox-content {
  position: relative;
  z-index: 1;
  max-width: min(90vw, 900px);
  max-height: 85vh;
  text-align: center;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 75vh;
  border-radius: var(--radius-sm);
  margin-inline: auto;
}

.lightbox-caption {
  color: #fff;
  margin-top: 1rem;
  font-size: var(--text-sm);
}

.lightbox-close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  opacity: 0.8;
}

.lightbox-close:hover {
  opacity: 1;
}

/* ============================================================
   Gallery 一覧ページ
   ============================================================ */
.gallery-list-page {
  min-height: 100vh;
  background-color: var(--color-bg);
}

.gallery-list-page .container {
  padding-block: var(--section-py);
}

.gallery-list-page .section-title {
  text-align: center;
  margin-bottom: var(--space-lg);
  display: block;
}

.gallery-list-page .gallery-grid {
  grid-template-columns: repeat(2, 1fr);
}

/* ============================================================
   Blog
   ============================================================ */
#blog {
  padding-block: var(--section-py);
  background-color: var(--color-surface);
}

.blog-section-lead {
  font-size: var(--text-sm);
  font-weight: var(--weight-light);
  line-height: var(--leading-body);
  color: var(--color-text);
  opacity: 0.75;
  margin-top: calc(-1 * var(--section-gap) / 2);
  margin-bottom: var(--section-gap);
}

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.blog-card {
  background-color: var(--color-bg);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s ease;
  border: 1px solid var(--color-border);
}

.blog-card:hover {
  box-shadow: 0 4px 20px rgba(74, 74, 74, 0.12);
}

.blog-card__link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.blog-card__thumb img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  width: 100%;
  display: block;
}

.blog-card__body {
  padding: 1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.blog-card__category {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: var(--weight-bold);
  color: var(--color-accent-3);
  background-color: color-mix(in srgb, var(--color-accent-3) 10%, transparent);
  padding: 0.15em 0.6em;
  border-radius: 999px;
  letter-spacing: 0.03em;
  align-self: flex-start;
}

.blog-card__title {
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  margin: 0;
}

.blog-card__meta {
  font-size: var(--text-sm);
  color: var(--color-text);
  opacity: 0.6;
  margin: 0;
}

.blog-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.2rem;
}

.blog-tag {
  font-size: 0.75rem;
  color: var(--color-accent-3);
}

.blog-card__more {
  font-size: 0.85rem;
  color: var(--color-accent-3);
  margin-top: auto;
  padding-top: 0.6rem;
}

.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text);
  opacity: 0.6;
  padding: 2rem;
}

/* ── ブログ詳細 ── */
.blog-detail-wrap {
  max-width: 760px;
  margin: 6rem auto 4rem;
  padding-inline: 1.5rem;
}

.blog-detail__eyecatch img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.blog-detail__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.blog-detail__meta {
  font-size: var(--text-sm);
  color: var(--color-text);
  opacity: 0.6;
}

.blog-detail__title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  margin: 0 0 0.75rem;
}

.blog-detail__tags {
  margin-bottom: 1.25rem;
}

.blog-detail__divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 1.5rem 0;
}

.blog-detail__body {
  font-size: var(--text-base);
  line-height: 1.9;
  color: var(--color-text);
}

.blog-detail__back {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.blog-detail__back a {
  color: var(--color-accent-3);
  text-decoration: none;
  font-size: var(--text-sm);
}

.blog-detail__back a:hover {
  text-decoration: underline;
}

/* ============================================================
   Blog 一覧ページ
   ============================================================ */
.blog-list-page {
  min-height: 100vh;
  background-color: var(--color-bg);
}

.blog-list-page .container {
  padding-block: var(--section-py);
}

.blog-list-page .section-title {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.blog-list-header {
  padding: var(--space-xl) 0 var(--space-md);
  text-align: center;
}

.blog-filter-section {
  margin-bottom: var(--space-xl);
}

.blog-filter-section + .blog-filter-section {
  margin-top: calc(-1 * var(--space-md));
}

.blog-filter__label {
  font-size: 0.75rem;
  color: var(--color-text);
  opacity: 0.55;
  margin-bottom: 0.4rem;
  display: block;
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.blog-filter__btn {
  padding: 0.3em 0.9em;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
  display: inline-block;
}

.blog-filter__btn--active,
.blog-filter__btn:hover {
  background: var(--color-accent-3);
  color: #fff;
  border-color: var(--color-accent-3);
}

.blog-empty-state,
.gallery-empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 1rem;
  color: var(--color-text);
  opacity: 0.6;
}

.blog-empty-state a,
.gallery-empty-state a {
  color: var(--color-accent-3);
}

/* ── ページネーション（Blog / Gallery 共通） ── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  flex-wrap: wrap;
}

.pagination__btn {
  padding: 0.35em 0.8em;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: transparent;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.2s, color 0.2s;
  display: inline-block;
}

.pagination__btn--active {
  background: var(--color-accent-3);
  color: #fff;
  border-color: var(--color-accent-3);
  pointer-events: none;
}

.pagination__btn[aria-disabled="true"] {
  opacity: 0.35;
  pointer-events: none;
}

.pagination__ellipsis {
  color: var(--color-text);
  opacity: 0.5;
}

/* ============================================================
   Contact
   ============================================================ */
#contact {
  padding-block: var(--section-py);
  background-color: var(--color-bg);
}

.contact-inner {
  text-align: center;
}

.contact-lead {
  font-size: var(--text-lg);
  font-weight: var(--weight-light);
  margin-bottom: 1.5rem;
}

.contact-email {
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  letter-spacing: 0.05em;
  position: relative;
  transition: color 0.2s ease;
}

.contact-email::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent-1);
  transition: width 0.2s ease;
}

.contact-email:hover {
  color: var(--color-accent-1);
}

.contact-email:hover::after {
  width: 100%;
}

/* ============================================================
   フッター
   ============================================================ */
footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
}

footer p {
  font-size: var(--text-sm);
  color: var(--color-border);
  letter-spacing: 0.05em;
}

/* ============================================================
   レスポンシブ：タブレット（768px〜）
   ============================================================ */
@media (min-width: 768px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================================
   レスポンシブ：PC（1024px〜）
   ============================================================ */
@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-grid {
    grid-template-columns: 200px 1fr;
    align-items: start;
  }

  .about-avatar {
    margin-inline: 0;
    position: sticky;
    top: 6rem;
  }
}

/* ============================================================
   レスポンシブ：スマートフォン（〜767px）
   ============================================================ */
@media (max-width: 767px) {
  .nav-hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background-color: rgba(240, 237, 229, 0.97);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem;
  }

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

  .nav-links li {
    padding-block: 0.75rem;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  nav {
    position: relative;
  }

  nav.is-sticky {
    position: sticky;
    top: 0;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}