/*
Theme Name: JIDA Portfolio
Theme URI: https://www.jida.or.jp
Author: JIDA
Author URI: https://www.jida.or.jp
Description: 公益社団法人JIDA（日本インダストリアルデザイン協会）卒業制作ポートフォリオテーマ。ミニマルでモノトーン＋ゴールドアクセントの洗練されたデザイン。WCAG 2.1 AA アクセシビリティ対応。
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: jida-portfolio
Tags: portfolio, minimal, grid, accessibility-ready, custom-menu, custom-logo, featured-images, translation-ready
*/

/* =============================================================================
   0. CSS Custom Properties
   ============================================================================= */

:root {
  /* Color Palette */
  --color-bg:               #F8F7F5;
  --color-surface:          #FFFFFF;
  --color-charcoal:         #1E1E1E;
  --color-charcoal-mid:     #2D2D2D;
  --color-charcoal-soft:    #4A4A4A;
  --color-text-primary:     #1E1E1E;
  --color-text-secondary:   #5A5A5A;
  --color-text-muted:       #8A8A8A;
  --color-gold:             #C4A84F;   /* Decorative gold */
  --color-gold-dark:        #7A6118;   /* Gold for text (passes WCAG AA on white) */
  --color-border:           #E2E0DC;
  --color-border-light:     #F0EEE9;
  --color-hover-bg:         #F2F0EB;

  /* Typography */
  --font-display:  'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body:     'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Font Sizes (fluid) */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-md:   1.125rem;
  --text-lg:   1.25rem;
  --text-xl:   1.5rem;
  --text-2xl:  2rem;
  --text-3xl:  2.75rem;
  --text-4xl:  3.75rem;
  --text-5xl:  5rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --max-width: 1440px;
  --content-width: 760px;
  --grid-gap: 1.5rem;
  --nav-height: 72px;
  --border-radius: 2px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
}

/* =============================================================================
   1. Reset & Base
   ============================================================================= */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Accessibility: skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--color-charcoal);
  color: var(--color-gold);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: var(--space-4);
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-gold-dark);
  outline-offset: 3px;
}

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

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

ul, ol {
  list-style: none;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
}

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

/* =============================================================================
   2. Typography
   ============================================================================= */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-charcoal);
}

h1 { font-size: clamp(2.5rem, 5vw, var(--text-5xl)); }
h2 { font-size: clamp(1.75rem, 3.5vw, var(--text-4xl)); }
h3 { font-size: clamp(1.375rem, 2.5vw, var(--text-3xl)); }
h4 { font-size: clamp(1.125rem, 2vw, var(--text-2xl)); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  max-width: 68ch;
  line-height: 1.8;
}

.entry-content p,
.entry-content li {
  font-size: var(--text-md);
  color: var(--color-text-secondary);
}

.entry-content > * + * {
  margin-top: var(--space-6);
}

strong { font-weight: 600; }
em     { font-style: italic; }

/* Lead text */
.lead {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 52ch;
}

/* Label / eyebrow text */
.label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* Gold label */
.label--gold {
  color: var(--color-gold-dark);
}

/* =============================================================================
   3. Layout Utilities
   ============================================================================= */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-8);
}

@media (max-width: 768px) {
  .container {
    padding-inline: var(--space-5);
  }
}

.container--narrow {
  max-width: var(--content-width);
}

/* Divider */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-12) 0;
}

.divider--gold {
  border-color: var(--color-gold);
  width: 48px;
  margin-inline: 0;
}

/* Section padding */
.section {
  padding-block: var(--space-24);
}

@media (max-width: 768px) {
  .section {
    padding-block: var(--space-16);
  }
}

/* =============================================================================
   4. Navigation
   ============================================================================= */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(248, 247, 245, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.site-branding {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
  height: 36px;
  width: auto;
}

/* ロゴ画像プレースホルダー（カスタムロゴ未設定時） */
.site-logo-placeholder {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px dashed var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  height: 36px;
  box-sizing: border-box;
  flex-shrink: 0;
}
.site-logo-placeholder svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.site-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-charcoal);
  line-height: 1;
}

.site-title span {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* Primary Nav */
.primary-navigation {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  margin-left: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-menu a {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-4);
  right: var(--space-4);
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.nav-menu a:hover,
.nav-menu .current-menu-item > a,
.nav-menu .current-page-ancestor > a {
  color: var(--color-charcoal);
}

.nav-menu a:hover::after,
.nav-menu .current-menu-item > a::after,
.nav-menu .current-page-ancestor > a::after {
  transform: scaleX(1);
}

/* Nav lang toggle (非表示) */
.nav-lang {
  display: none;
}
.nav-lang a { transition: color var(--transition-fast); }
.nav-lang a:hover, .nav-lang a.active { color: var(--color-charcoal); }
.nav-lang span { color: var(--color-border); }

/* Hamburger (mobile) */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  cursor: pointer;
  background: none;
  border: none;
  color: var(--color-charcoal);
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile nav */
@media (max-width: 900px) {
  .menu-toggle { display: flex; }

  .primary-navigation {
    position: fixed;
    inset: 0;
    top: var(--nav-height);
    background: var(--color-bg);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    padding: var(--space-8) var(--space-8);
    gap: 0;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
  }

  .primary-navigation.is-open {
    transform: translateX(0);
  }

  .nav-menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
  }

  .nav-menu a {
    font-size: var(--text-xl);
    padding: var(--space-4) 0;
    letter-spacing: 0.02em;
    border-bottom: 1px solid var(--color-border-light);
    width: 100%;
  }

  .nav-menu a::after { display: none; }
  .nav-lang { margin-top: var(--space-8); }
}

/* =============================================================================
   5. Site Footer
   ============================================================================= */

.site-footer {
  background: #5A5856;
  color: var(--color-text-muted);
  padding-block: var(--space-16) var(--space-10);
  margin-top: var(--space-32);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: var(--space-10);
}

@media (max-width: 768px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* フッターロゴ */
.footer-logo img {
  height: 36px;
  width: auto;
}

.footer-logo-placeholder {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px dashed rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.45);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  height: 36px;
  box-sizing: border-box;
  width: fit-content;
  margin-bottom: var(--space-4);
}
.footer-logo-placeholder svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.footer-brand p {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.7;
  max-width: 32ch;
  color: rgba(255,255,255,0.45);
}

.footer-nav h3 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  margin-bottom: var(--space-5);
}

.footer-nav ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-nav a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  transition: color var(--transition-fast);
}
.footer-nav a:hover { color: var(--color-gold); }

.footer-gold-line {
  display: block;
  width: 32px;
  height: 1px;
  background: var(--color-gold);
  margin-bottom: var(--space-5);
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.25);
  flex-wrap: wrap;
}

.site-footer__bottom a {
  color: rgba(255,255,255,0.35);
  transition: color var(--transition-fast);
}
.site-footer__bottom a:hover { color: var(--color-gold); }

/* =============================================================================
   6. Front Page
   ============================================================================= */

.page-offset { padding-top: var(--nav-height); }

/* Hero */
.hero {
  min-height: calc(100svh - var(--nav-height));
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: #EDEBE7;
  overflow: hidden;
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
}

.hero__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-24) var(--space-16);
  color: var(--color-text-primary);
}

@media (max-width: 900px) {
  .hero__text {
    padding: var(--space-16) var(--space-6);
    order: 2;
  }
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-8);
}

.hero__eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--color-gold);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 200;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-charcoal);
  margin-bottom: var(--space-8);
}

.hero__title em {
  font-style: normal;
  color: var(--color-gold-dark);
}

.hero__desc {
  font-size: var(--text-md);
  line-height: 1.8;
  color: var(--color-text-secondary);
  max-width: 42ch;
  margin-bottom: var(--space-12);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-charcoal);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  transition: gap var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}

.hero__cta:hover {
  gap: var(--space-5);
  border-bottom-color: var(--color-gold);
  color: var(--color-gold-dark);
}

.hero__cta svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}
.hero__cta:hover svg { transform: translateX(4px); }

/* ヒーロービジュアル：スライドショーコンテナ */
.hero__visual {
  position: relative;
  overflow: hidden;
  background: var(--color-surface-mid);
}

/* ゴールドライン装飾 */
.hero__visual::before {
  content: '';
  position: absolute;
  left: 0; top: 10%; bottom: 10%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--color-gold), transparent);
  z-index: 2;
  pointer-events: none;
}

@media (max-width: 900px) {
  .hero__visual {
    aspect-ratio: 4/3;
    order: 1;
  }
  .hero__visual::before { display: none; }
}

/* スライド共通 */
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
  background-size: cover;
  background-position: center;
}
.hero-slide.is-active { opacity: 1; }

/* スライドインジケーター */
.hero-slide-dots {
  position: absolute;
  bottom: 1.25rem;
  right: 1.5rem;
  display: flex;
  gap: 0.5rem;
  z-index: 3;
}
.hero-slide-dots span {
  display: block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--color-gold-light);
  opacity: 0.4;
  transition: opacity 0.4s;
}
.hero-slide-dots span.is-active { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .hero-slide { transition: none; }
}

/* Stats bar */
.stats-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.stats-bar__inner {
  display: flex;
  justify-content: space-around;
  padding-block: var(--space-8);
}

@media (max-width: 600px) {
  .stats-bar__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    padding-block: var(--space-6);
  }
}

.stat {
  text-align: center;
  padding-inline: var(--space-6);
}

.stat__value {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-charcoal);
  letter-spacing: -0.02em;
  line-height: 1;
}

.stat__value em {
  font-style: normal;
  font-size: var(--text-xl);
  color: var(--color-gold-dark);
  vertical-align: super;
  font-family: var(--font-body);
}

.stat__label {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* Section header */
.section-header {
  margin-bottom: var(--space-12);
}

.section-header__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold-dark);
  margin-bottom: var(--space-5);
}

.section-header__eyebrow::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-gold);
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, var(--text-3xl));
  max-width: 20ch;
}

.section-header p {
  margin-top: var(--space-4);
  color: var(--color-text-secondary);
}

/* Featured grid (home) — 均等グリッド、大小差なし */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

@media (max-width: 960px) {
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* =============================================================================
   7. Work Card
   ============================================================================= */

.work-card {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-surface);
  text-decoration: none;
  cursor: pointer;
  group: true;
}

.work-card:focus-visible {
  outline: 2px solid var(--color-gold-dark);
  outline-offset: 2px;
}

.work-card__media {
  position: relative;
  overflow: hidden;
  background: var(--color-border-light);
  aspect-ratio: 4/3;
}

/* 均等グリッド：大小差なし（override削除済み） */

.work-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.work-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(30,30,30,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.work-card__overlay-text {
  position: absolute;
  bottom: var(--space-6);
  left: var(--space-6);
  right: var(--space-6);
  color: var(--color-surface);
  transform: translateY(8px);
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.work-card:hover .work-card__overlay-text,
.work-card:focus-visible .work-card__overlay-text {
  transform: translateY(0);
  opacity: 1;
}

.work-card__overlay-text .label {
  color: var(--color-gold);
  margin-bottom: var(--space-2);
}

.work-card__overlay-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-surface);
  line-height: 1.3;
}

.work-card__body {
  padding: var(--space-6) var(--space-5) var(--space-6);
}

.work-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.work-card__year {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-gold-dark);
}

.work-card__category {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.work-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-charcoal);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.work-card__author {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* =============================================================================
   8. Archive Page
   ============================================================================= */

.archive-header {
  padding-block: var(--space-20) var(--space-12);
  border-bottom: 1px solid var(--color-border);
}

.archive-header__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.archive-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, var(--text-5xl));
  font-weight: 400;
  letter-spacing: -0.02em;
}

/* Filter bar */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding-block: var(--space-8);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--space-10);
}

.filter-bar__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-right: var(--space-2);
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filter-btn:hover {
  background: var(--color-hover-bg);
  color: var(--color-charcoal);
  border-color: var(--color-charcoal-soft);
}

.filter-btn.is-active {
  background: var(--color-charcoal);
  color: var(--color-surface);
  border-color: var(--color-charcoal);
}

/* Works grid */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

@media (max-width: 1200px) {
  .works-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

@media (max-width: 540px) {
  .works-grid {
    grid-template-columns: 1fr;
  }
}

/* Load more */
.load-more-wrap {
  text-align: center;
  margin-top: var(--space-16);
}

/* =============================================================================
   9. Single Work Page
   ============================================================================= */

.work-hero {
  background: #ECEAE6;
  padding-block: var(--space-24) 0;
  overflow: hidden;
}

.work-hero__inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-16);
  align-items: end;
}

@media (max-width: 900px) {
  .work-hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.work-hero__info {
  padding-bottom: var(--space-12);
}

.work-hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.work-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 200;
  color: var(--color-charcoal);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-8);
}

.work-meta-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.work-meta-item {
  display: flex;
  gap: var(--space-4);
  align-items: baseline;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-4);
}

.work-meta-item:last-child {
  border-bottom: none;
}

.work-meta-item__key {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  min-width: 80px;
  flex-shrink: 0;
}

.work-meta-item__value {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.work-hero__image {
  position: relative;
  overflow: hidden;
  margin-top: auto;
}

.work-hero__image img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  object-position: center;
  display: block;
}

@media (max-width: 900px) {
  .work-hero__image img { height: 300px; }
}

/* Work content */
.work-content {
  padding-block: var(--space-20);
}

.work-content__grid {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: var(--space-16);
}

@media (max-width: 900px) {
  .work-content__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .work-content__main    { order: 1; }
  .work-content__sidebar { order: 2; position: static; }
}

.work-content__sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-8));
  height: fit-content;
}

.work-content__sidebar h3 {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.work-content__sidebar ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.work-content__sidebar li a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.work-content__sidebar li a:hover {
  color: var(--color-charcoal);
}

/* 制作者プロフィール */
.creator-profile {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.creator-profile__photo {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--space-4);
  background: var(--color-border-light);
}

.creator-profile__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.creator-profile__name {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-charcoal);
  line-height: 1.4;
  margin-bottom: var(--space-3);
}

.creator-profile__kana {
  display: block;
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  margin-top: var(--space-1);
}

.creator-profile__bio {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.sidebar-back {
  margin-top: var(--space-6);
}

/* Gallery */
.work-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--grid-gap);
  margin-top: var(--space-12);
}

.work-gallery__item {
  overflow: hidden;
  background: var(--color-border-light);
  cursor: zoom-in;
}

.work-gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.work-gallery__item:hover img {
  transform: scale(1.04);
}

.work-gallery__item--full {
  grid-column: span 2;
}

@media (max-width: 600px) {
  .work-gallery {
    grid-template-columns: 1fr;
  }
  .work-gallery__item--full {
    grid-column: span 1;
  }
}

/* Related works */
.related-works {
  padding-block: var(--space-20);
  border-top: 1px solid var(--color-border);
}

/* Navigation between works */
.work-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-8);
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-12);
}

.work-nav__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-decoration: none;
  max-width: 40%;
}

.work-nav__link--next { text-align: right; }

.work-nav__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.work-nav__link--next .work-nav__label {
  justify-content: flex-end;
}

.work-nav__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-charcoal);
  line-height: 1.3;
  transition: color var(--transition-fast);
}

.work-nav__link:hover .work-nav__title {
  color: var(--color-gold-dark);
}

/* =============================================================================
   10. Buttons & Interactive
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-charcoal);
  color: var(--color-surface);
  border-color: var(--color-charcoal);
}

.btn--primary:hover {
  background: var(--color-charcoal-mid);
  border-color: var(--color-charcoal-mid);
}

.btn--outline {
  background: transparent;
  color: var(--color-charcoal);
  border-color: var(--color-charcoal);
}

.btn--outline:hover {
  background: var(--color-charcoal);
  color: var(--color-surface);
}

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

.btn--ghost:hover {
  background: var(--color-hover-bg);
  color: var(--color-charcoal);
  border-color: var(--color-charcoal-soft);
}

.btn--gold {
  background: transparent;
  color: var(--color-gold-dark);
  border-color: var(--color-gold);
}

.btn--gold:hover {
  background: var(--color-charcoal);
  color: var(--color-gold);
  border-color: var(--color-gold);
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 90svh;
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition-fast);
}
.lightbox__close:hover { color: var(--color-surface); }

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: var(--text-2xl);
  transition: color var(--transition-fast);
}
.lightbox__prev { left: var(--space-6); }
.lightbox__next { right: var(--space-6); }
.lightbox__prev:hover, .lightbox__next:hover { color: var(--color-surface); }

/* =============================================================================
   11. 404 / No Posts
   ============================================================================= */

.error-page {
  min-height: 60svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-24) var(--space-8);
}

.error-page__code {
  font-family: var(--font-display);
  font-size: clamp(6rem, 15vw, 12rem);
  font-weight: 400;
  line-height: 1;
  color: var(--color-border);
  letter-spacing: -0.04em;
  margin-bottom: var(--space-6);
}

.error-page__title {
  font-size: var(--text-2xl);
  color: var(--color-charcoal);
  margin-bottom: var(--space-4);
}

.error-page p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

/* =============================================================================
   12. Miscellaneous
   ============================================================================= */

/* Gold accent line */
.gold-line {
  display: block;
  width: 48px;
  height: 1px;
  background: var(--color-gold);
  margin-block: var(--space-6);
}

/* Tags */
.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-hover-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-16);
}

.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.pagination a:hover {
  background: var(--color-hover-bg);
  color: var(--color-charcoal);
  border-color: var(--color-charcoal-soft);
}

.pagination .current {
  background: var(--color-charcoal);
  color: var(--color-surface);
  border-color: var(--color-charcoal);
}

/* Image placeholder for missing thumbnails */
.work-card__media--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-border-light);
}

.work-card__media--placeholder svg {
  width: 48px;
  height: 48px;
  color: var(--color-border);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* Print */
@media print {
  .site-header, .site-footer, .filter-bar, .work-nav { display: none; }
  .page-offset { padding-top: 0; }
}

/* High contrast mode */
@media (forced-colors: active) {
  .work-card__overlay { display: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}