/*
Theme Name: TanqLabo Theme
Description: NPO法人 探究Labo 公式WordPressテーマ。WCAG 2.2 AA準拠、SEO最適化済み。
Version: 1.0.0
Author: TanqLabo
Text Domain: tanqlabo
Requires at least: 6.0
Tested up to: 6.4
Requires PHP: 8.0
License: GPL v2 or later
*/

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

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  font-size: 1.6rem;
  line-height: 1.6;
  color: var(--color-black);
  background-color: #F7FAFC;
}

:root {
  --color-primary: #0A2A6B;
  --color-accent: #F5C400;
  --color-bg: #F7FAFC;
  --color-white: #ffffff;
  --color-black: #1a1a1a;
  --color-gray-light: #f8f9fa;
  --color-gray: #4a5568;
  --color-border: #dee2e6;
  --color-focus: #2563eb;
  --color-focus-ring: rgba(37, 99, 235, 0.3);
  --font-primary: 'Noto Sans JP', 'Hiragino Sans', sans-serif;
  --container-width: 1200px;
  --container-padding: 2rem;
  --border-radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

.l-grid {
  display: grid;
  gap: 2rem;
}

.l-grid--2col {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.l-grid--3col {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.l-grid--4col {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.l-section {
  padding: 4rem 0;
}

.l-section--hero {
  padding: 8rem 0 6rem;
}

.c-header {
  background: var(--color-white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.c-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem var(--container-padding);
}

.c-header__logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.c-logo {
  display: block;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.c-nav {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2rem;
}

.c-nav__link {
  color: var(--color-black);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.c-nav__link:hover,
.c-nav__link:focus {
  background: var(--color-gray-light);
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.c-nav__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-focus-ring);
}

.c-nav__link--current {
  background: var(--color-primary);
  color: var(--color-white);
}

.c-hero {
  background-image: url(assets/images/activity-02.avif);
  color: var(--color-white);
  text-align: center;
}

.c-hero__title {
  font-size: clamp(3.2rem, 5vw, 4.8rem);
  margin-bottom: 1rem;
  font-weight: 700;
}

.c-hero__subtitle {
  font-size: clamp(1.6rem, 2.5vw, 2rem);
  margin-bottom: 3rem;
  opacity: 0.9;
}

.c-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.2rem 2.4rem;
  font-size: 1.6rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

.c-btn--primary {
  background: var(--color-accent);
  color: var(--color-black);
}

.c-btn--primary:hover,
.c-btn--primary:focus {
  background: #e6b000;
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.c-btn--primary:focus-visible {
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-focus-ring), 0 4px 12px rgba(0, 0, 0, 0.15);
}

.c-btn--secondary {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.c-btn--secondary:hover,
.c-btn--secondary:focus {
  background: var(--color-white);
  color: var(--color-primary);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.c-card {
  background: var(--color-white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
}

.c-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.c-card__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: center top;
}

.c-card__body {
  padding: 2rem;
}

.c-card__title {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.c-card__title a {
  color: inherit;
  text-decoration: none;
}

.c-card__title a:hover,
.c-card__title a:focus {
  color: var(--color-primary);
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.c-card__excerpt {
  color: var(--color-gray);
  margin-bottom: 1rem;
}

.c-card__logo {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.c-card__logo .activity-logo {
  max-width: 80px;
  max-height: 80px;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.c-card__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.4rem;
  color: var(--color-gray);
}

.member-position {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.3rem 0.8rem;
  border-radius: calc(var(--border-radius) / 2);
  font-size: 1.2rem;
  font-weight: 500;
}

.member-department {
  background: var(--color-gray-light);
  color: var(--color-black);
  padding: 0.3rem 0.8rem;
  border-radius: calc(var(--border-radius) / 2);
  font-size: 1.2rem;
}

.member-skills {
  margin-top: 0.5rem;
  color: var(--color-gray);
  font-size: 1.2rem;
  line-height: 1.4;
}

/* メンバーカード専用の画像スタイル */
.c-card--member .c-card__img {
  height: 374px ;
  object-fit: contain;
  object-position: center;
}

/* 活動内容カード専用の画像スタイル */
.c-card--activity .c-card__img {
  height: 300px;
  object-fit: cover;
  object-position: center top;
}

.c-breadcrumb {
  background: var(--color-gray-light);
  padding: 1rem 0;
}

.c-breadcrumb__list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.5rem;
}

.c-breadcrumb__item {
  font-size: 1.4rem;
}

.c-breadcrumb__item:not(:last-child)::after {
  content: '>';
  margin-left: 0.5rem;
  color: var(--color-gray);
}

.c-breadcrumb__link {
  color: var(--color-primary);
  text-decoration: none;
}

.c-breadcrumb__link:hover,
.c-breadcrumb__link:focus {
  text-decoration: underline;
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.c-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin: 4rem 0;
}

.c-pagination__link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-primary);
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.c-pagination__link:hover,
.c-pagination__link:focus {
  background: var(--color-primary);
  color: var(--color-white);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.c-pagination__link--current {
  background: var(--color-primary);
  color: var(--color-white);
}

.c-footer {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 4rem 0 2rem;
}

.c-footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.c-footer__section h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.c-footer__nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.c-footer__nav li {
  margin-bottom: 0.5rem;
}

.c-footer__nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition);
}

.c-footer__nav a:hover,
.c-footer__nav a:focus {
  color: var(--color-accent);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.c-footer__bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
}

.c-skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-focus);
  color: var(--color-white);
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  z-index: 1000;
  font-weight: 600;
  font-size: 1.4rem;
}

.c-skip-link:focus {
  top: 6px;
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
}

.p-home__section {
  margin-bottom: 6rem;
}

.p-home__section-title {
  text-align: center;
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  margin-bottom: 3rem;
  color: var(--color-primary);
}

.p-single__content {
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

.p-single__content h2,
.p-single__content h3,
.p-single__content h4 {
  color: var(--color-primary);
  margin: 3rem 0 1rem;
}

.p-single__content h2 {
  font-size: 2.4rem;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 0.5rem;
}

.p-single__content h3 {
  font-size: 2rem;
}

.p-single__content h4 {
  font-size: 1.8rem;
}

.p-single__content p {
  margin-bottom: 1.5rem;
}

.p-single__content ul,
.p-single__content ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.p-single__content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
}

.u-text-center {
  text-align: center;
}

.u-mb-0 {
  margin-bottom: 0;
}

.u-mb-2 {
  margin-bottom: 2rem;
}

.u-mb-3 {
  margin-bottom: 3rem;
}

.u-mt-0 {
  margin-top: 0;
}

.u-mt-2 {
  margin-top: 2rem;
}

.u-mt-3 {
  margin-top: 3rem;
}

.u-visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 1024px) {
  :root {
    --container-padding: 1.5rem;
  }

  .l-section {
    padding: 3rem 0;
  }
}

/* ハンバーガーメニューのスタイル */
.c-hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
  transition: var(--transition);
}

.c-hamburger:hover,
.c-hamburger:focus {
  background: var(--color-gray-light);
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--border-radius);
}

.c-hamburger__line {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.c-hamburger[aria-expanded="true"] .c-hamburger__line:nth-child(1) {
  transform: rotate(45deg) translate(8px, 6px);
}

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

.c-hamburger[aria-expanded="true"] .c-hamburger__line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ナビゲーションのスタイル調整 */
.c-nav--desktop .c-nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2rem;
}

.c-nav--mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-white);
  z-index: 1000;
  padding: 8rem 0 2rem;
  overflow-y: auto;
}

.c-nav--mobile.is-open {
  display: block;
}

.c-nav--mobile .c-nav__list {
  display: flex;
  flex-direction: column;
  list-style: none;
  margin: 0;
  padding: 0 var(--container-padding);
  gap: 0;
}

.c-nav--mobile .c-nav__item {
  border-bottom: 1px solid var(--color-border);
}

.c-nav--mobile .c-nav__item:last-child {
  border-bottom: none;
}

.c-nav--mobile .c-nav__link {
  display: block;
  padding: 1.5rem 0;
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--color-black);
  text-decoration: none;
  transition: var(--transition);
  border-radius: 0;
}

.c-nav--mobile .c-nav__link:hover,
.c-nav--mobile .c-nav__link:focus {
  color: var(--color-primary);
  background: var(--color-gray-light);
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }

  .c-header__inner {
    position: relative;
  }

  .c-nav--desktop {
    display: none;
  }

  .c-hamburger {
    display: flex;
  }

  .l-grid--2col,
  .l-grid--3col,
  .l-grid--4col {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .c-btn {
    width: 100%;
  }
}

/* ===== Accessibility Utilities ===== */
.u-visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

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

/* Focus visible for better keyboard navigation */
*:focus:not(:focus-visible) {
  outline: none;
}

*:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-focus-ring);
}

/* Card focus styles */
.c-card.is-focused {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
  box-shadow: 0 0 0 4px var(--color-focus-ring);
}

.c-card[tabindex="0"]:focus {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
  box-shadow: 0 0 0 4px var(--color-focus-ring);
}
