/* ========================================
   EasyEasy Community Portal
   Zenn-inspired minimal design
   ======================================== */

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #3ea8ff;
  --color-primary-dark: #0f83fd;
  --color-primary-bg: #e8f4ff;
  --color-text: #333;
  --color-text-secondary: #666;
  --color-text-light: #999;
  --color-bg: #f5f6f7;
  --color-bg-white: #fff;
  --color-border: #e4e6ea;
  --color-border-light: #f0f1f3;
  --color-tag-bg: #eef3f8;
  --color-tag-text: #516a83;
  --color-youtube: #ff0000;
  --color-slide: #f59e0b;
  --color-article: #10b981;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 960px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--color-primary);
}

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

/* --- Container --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Header --- */
.site-header {
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  height: 60px;
  gap: 24px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo:hover {
  color: var(--color-text);
}

.logo-icon {
  font-size: 1.3rem;
}

.site-nav {
  display: flex;
  gap: 4px;
}

.nav-link {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: background 0.15s, color 0.15s;
}

.nav-link:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.nav-link.active {
  color: var(--color-primary-dark);
  background: var(--color-primary-bg);
}

.header-actions {
  margin-left: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.btn-sm {
  padding: 5px 14px;
  font-size: 0.82rem;
}

/* --- Hero --- */
.hero {
  background: var(--color-bg-white);
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--color-border);
}

.hero-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.hero-subtitle {
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-bottom: 28px;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.hero-stat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 20px 14px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.hero-stat-icon {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.hero-stat-number {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

.hero-cta-mobile {
  display: none;
}

/* --- Section Header --- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.section-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
}

/* --- Filter --- */
.year-filter {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-bg-white);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.filter-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* --- Events Section --- */
.events-section {
  padding: 32px 0 48px;
}

/* --- Event Card --- */
.events-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.event-card {
  display: block;
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s, border-color 0.2s;
  text-decoration: none;
  color: var(--color-text);
  overflow: hidden;
}

.event-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  color: var(--color-text);
}

.event-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.event-number {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.event-date {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.event-card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}

.event-card-meta {
  display: flex;
  gap: 14px;
  margin-bottom: 12px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.meta-video {
  color: var(--color-youtube);
}

.event-card-talks {
  border-top: 1px solid var(--color-border-light);
  padding-top: 10px;
}

.talk-preview {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.talk-preview-bullet {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
  margin-top: 8px;
}

.talk-preview-title {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.talk-more {
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-top: 4px;
  display: block;
}

/* --- Upcoming Event Card --- */
.event-card-upcoming {
  border-left: 3px solid var(--color-primary);
  background: var(--color-primary-bg);
}

.event-card-upcoming:hover {
  border-color: var(--color-primary-dark);
}

.event-card-header-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.event-upcoming-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.event-upcoming-body {
  margin-top: 4px;
}

.event-upcoming-message {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.event-upcoming-cta {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

/* --- Load More --- */
.load-more-wrapper {
  text-align: center;
  margin: 24px 0 32px;
}

.load-more-btn {
  padding: 10px 32px;
}

/* --- Year Navigation --- */
.year-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
}

.year-nav-btn {
  padding: 8px 20px;
}

/* --- Icon --- */
.icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.icon-sm {
  width: 14px;
  height: 14px;
}

/* --- Breadcrumb --- */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

.breadcrumb a:hover {
  color: var(--color-primary-dark);
}

.breadcrumb-sep {
  margin: 0 8px;
}

/* --- Event Detail --- */
.event-detail {
  padding-bottom: 48px;
}

.event-detail-header {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
  border: 1px solid var(--color-border);
}

.event-number-badge {
  display: inline-block;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 2px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.event-detail-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.event-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.meta-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--color-primary-dark);
}

.hashtag {
  background: var(--color-tag-bg);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--color-tag-text);
}

/* --- Video Embed --- */
.video-section {
  margin-bottom: 28px;
}

.video-section h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: #000;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* --- YouTube Player --- */
.youtube-player-wrapper {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.youtube-thumbnail-wrapper {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #000;
}

.youtube-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.2s ease;
}

.youtube-player-wrapper:hover .youtube-thumbnail {
  opacity: 0.8;
}

.youtube-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.85;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.youtube-player-wrapper:hover .youtube-play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.1);
}

.youtube-iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
  border-radius: var(--radius-md);
  display: block;
}

/* --- Report Link --- */
.report-section {
  margin-bottom: 2rem;
}

.report-link {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.report-link:hover {
  background: #d6ecff;
  box-shadow: 0 2px 8px rgba(62, 168, 255, 0.15);
}

.report-link-inner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.report-link-inner .icon {
  color: var(--color-primary-dark);
  flex-shrink: 0;
}

.report-link-inner .icon-sm {
  margin-left: auto;
  color: var(--color-text-light);
}

/* --- Slide Embed --- */
.slide-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  aspect-ratio: 560 / 315;
}

.slide-wrapper iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* file:// では埋め込みが動かないため、iframeを隠してリンクだけ表示する */
.slide-link-fallback {
  display: none;
}
.is-local-file .resource-embed {
  display: none;
}
.is-local-file .slide-link-fallback {
  display: flex;
}

/* --- Talk Card --- */
.talks-section {
  margin-bottom: 28px;
}

.talks-section h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.talk-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 16px;
  border: 1px solid var(--color-border);
}

.talk-card-tbd {
  text-align: center;
  padding: 40px 24px;
}

.tbd-message {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.talk-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.talk-speaker {
  display: flex;
  align-items: center;
  gap: 12px;
}

.speaker-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.speaker-avatar-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 1rem;
}

.speaker-avatar-lg {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
}

.speaker-avatar-lg.speaker-avatar-placeholder {
  font-size: 1.3rem;
}

.speaker-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.speaker-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.speaker-id {
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.speaker-links {
  display: flex;
  gap: 8px;
}

.speaker-links a {
  color: var(--color-text-light);
  transition: color 0.15s;
}

.speaker-links a:hover {
  color: var(--color-primary-dark);
}

.talk-duration {
  font-size: 0.8rem;
  color: var(--color-text-light);
  background: var(--color-bg);
  padding: 2px 10px;
  border-radius: 20px;
}

.talk-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.talk-description {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.talk-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.tag {
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
}

/* --- Resources --- */
.talk-resources {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.resource-embed h4 {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}

.resource-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  transition: all 0.15s;
}

.resource-link:hover {
  box-shadow: var(--shadow-sm);
}

.resource-youtube {
  color: var(--color-youtube);
  border-color: rgba(255, 0, 0, 0.15);
}

.resource-youtube:hover {
  background: rgba(255, 0, 0, 0.03);
  color: var(--color-youtube);
}

.resource-slide {
  color: var(--color-slide);
  border-color: rgba(245, 158, 11, 0.2);
}

.resource-slide:hover {
  background: rgba(245, 158, 11, 0.03);
  color: var(--color-slide);
}

.resource-article {
  color: var(--color-article);
  border-color: rgba(16, 185, 129, 0.2);
}

.resource-article:hover {
  background: rgba(16, 185, 129, 0.03);
  color: var(--color-article);
}

/* --- Event Nav --- */
.event-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.event-nav-btn {
  min-width: 80px;
  text-align: center;
}

.event-nav-btn:first-child {
  text-align: left;
}

.event-nav-btn:last-child {
  text-align: right;
}

/* --- Page Header --- */
.page-header {
  padding: 32px 0 24px;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.page-lead {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* --- About Page --- */
.about-page {
  padding-bottom: 48px;
}

.about-section {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-bottom: 16px;
  border: 1px solid var(--color-border);
}

.about-section h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-light);
}

.about-section p {
  color: var(--color-text-secondary);
  margin-bottom: 10px;
  line-height: 1.8;
}

.about-section p:last-child {
  margin-bottom: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.stat-card {
  text-align: center;
  padding: 20px 12px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}

.stat-card-number {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.stat-card-label {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.organizers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.organizer-card {
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}

.organizer-main {
  display: flex;
  align-items: center;
  gap: 12px;
}

.organizer-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.organizer-avatar-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 1.1rem;
}

.organizer-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
}

.organizer-role {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.organizer-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.organizer-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.organizer-links a {
  color: var(--color-text-light);
}

.organizer-links a:hover {
  color: var(--color-primary-dark);
}

.join-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.join-card {
  display: block;
  padding: 20px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all 0.15s;
  color: var(--color-text);
}

.join-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
}

.join-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.join-card p {
  font-size: 0.85rem;
  margin-bottom: 0;
}

.link-list {
  list-style: none;
}

.link-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.link-list li:last-child {
  border-bottom: none;
}

.link-list a {
  font-size: 0.9rem;
}

/* --- Challenge Page --- */
.challenge-section {
  margin-bottom: 40px;
}

.challenge-section h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.challenge-lead {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  margin-bottom: 16px;
  line-height: 1.7;
}

.challenge-list {
  display: grid;
  gap: 12px;
}

.challenge-card {
  display: block;
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.challenge-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  color: var(--color-text);
}

.challenge-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.challenge-card-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
}

.challenge-video-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  color: var(--color-youtube);
  font-weight: 500;
}

/* --- 404 Page --- */
.not-found {
  text-align: center;
  padding: 80px 0;
}

.not-found h1 {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.not-found p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

/* --- Speakers Page --- */
.speakers-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  flex: 1;
  min-width: 200px;
}

.search-box .icon {
  color: var(--color-text-light);
}

.search-input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  width: 100%;
  color: var(--color-text);
}

.search-highlight {
  background: #fff3b0;
  color: inherit;
  padding: 0 2px;
  border-radius: 2px;
}

.sort-buttons {
  display: flex;
  gap: 4px;
}

.speakers-grid {
  display: grid;
  gap: 16px;
}

.speaker-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--color-border);
}

.speaker-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.speaker-card-info h3 {
  font-size: 1rem;
  font-weight: 600;
}

.speaker-count {
  font-size: 0.8rem;
  color: var(--color-primary-dark);
  font-weight: 500;
}

.speaker-talks-list {
  border-top: 1px solid var(--color-border-light);
  padding-top: 10px;
}

.speaker-talk-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0;
  font-size: 0.88rem;
  color: var(--color-text);
  transition: color 0.15s;
}

.speaker-talk-item:hover {
  color: var(--color-primary-dark);
}

.speaker-talk-number {
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--color-primary-dark);
  min-width: 32px;
}

.speaker-talk-title {
  flex: 1;
}

.speaker-talk-date {
  font-size: 0.78rem;
  color: var(--color-text-light);
  flex-shrink: 0;
}

.speaker-talks-more summary {
  font-size: 0.82rem;
  color: var(--color-primary-dark);
  cursor: pointer;
  padding: 6px 0;
  font-weight: 500;
}

.speaker-talks-more summary:hover {
  color: var(--color-primary);
}

.speaker-talks-more .toggle-open {
  display: none;
}

.speaker-talks-more[open] .toggle-closed {
  display: none;
}

.speaker-talks-more[open] .toggle-open {
  display: inline;
}

/* --- Footer --- */
.site-footer {
  margin-top: auto;
  background: var(--color-bg-white);
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.footer-links a:hover {
  color: var(--color-primary-dark);
}

.footer-copyright {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

/* --- Responsive --- */

/* タブレット */
@media (max-width: 768px) {
  .organizers-grid {
    grid-template-columns: 1fr;
  }

  .join-cards {
    grid-template-columns: 1fr;
  }

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

  .footer-content {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-copyright {
    text-align: center;
  }
}

/* スマートフォン */
@media (max-width: 640px) {
  /* ヘッダー */
  .site-header .container {
    gap: 8px;
    padding: 0 12px;
  }

  .site-logo {
    font-size: 1rem;
  }

  .site-nav {
    gap: 2px;
  }

  .nav-link {
    padding: 6px 8px;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .header-actions {
    display: none;
  }

  /* ヒーロー */
  .hero {
    padding: 24px 0 20px;
  }

  .hero-title {
    font-size: 1.2rem;
  }

  .hero-subtitle {
    font-size: 0.9rem;
  }

  .hero-stats-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .hero-stat-card:nth-child(n+2) {
    display: none;
  }

  .hero-stat-label {
    display: none;
  }

  .hero-cta-mobile {
    display: flex;
    width: fit-content;
    margin: 14px auto 0;
    padding: 10px 32px;
    font-size: 1rem;
  }

  /* イベント一覧 */
  .events-section {
    padding: 20px 0 32px;
  }

  .events-grid {
    grid-template-columns: 1fr;
  }

  .event-card {
    padding: 16px;
  }

  /* イベント詳細 */
  .event-detail-header {
    padding: 16px;
    border-radius: var(--radius-md);
  }

  .event-detail-header h1 {
    font-size: 1.15rem;
  }

  .event-detail-meta {
    gap: 8px;
    flex-direction: column;
    align-items: flex-start;
  }

  /* トークカード */
  .talk-card {
    padding: 14px;
  }

  .talk-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .talk-title {
    font-size: 1rem;
  }

  .talk-speaker {
    flex-wrap: wrap;
  }

  .speaker-info {
    min-width: 0;
  }

  .speaker-name {
    font-size: 0.85rem;
    word-break: break-all;
  }

  .speaker-links {
    flex-wrap: wrap;
  }

  /* リソースリンク */
  .resource-link {
    font-size: 0.82rem;
    padding: 8px 12px;
    word-break: break-all;
  }

  .report-link {
    padding: 1rem;
  }

  .report-link-inner {
    font-size: 0.9rem;
    flex-wrap: wrap;
  }

  /* About */
  .about-section {
    padding: 16px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .stat-card {
    padding: 14px 8px;
  }

  .stat-card-number {
    font-size: 1.4rem;
  }

  .organizers-grid {
    grid-template-columns: 1fr;
  }

  .organizer-card {
    padding: 14px;
  }

  /* 登壇者一覧 */
  .speakers-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .sort-buttons {
    flex-wrap: wrap;
  }

  .speaker-card {
    padding: 14px;
  }

  .speaker-card-info h3 {
    font-size: 0.9rem;
    word-break: break-all;
  }

  .speaker-talk-item {
    flex-wrap: wrap;
    gap: 2px 8px;
    font-size: 0.82rem;
  }

  .speaker-talk-number {
    order: 0;
  }

  .speaker-talk-date {
    order: 1;
    width: auto;
    text-align: left;
  }

  .speaker-talk-title {
    order: 2;
    width: 100%;
    line-height: 1.5;
  }

  /* ページヘッダー */
  .page-header {
    padding: 20px 0 16px;
  }

  .page-header h1 {
    font-size: 1.2rem;
  }

  /* フッター */
  .footer-content {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  /* コンテナ */
  .container {
    padding: 0 12px;
  }

  /* 年フィルター */
  .year-filter {
    flex-wrap: wrap;
    gap: 4px;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 極小画面（320px等） */
@media (max-width: 380px) {
  .site-header .container {
    gap: 4px;
    padding: 0 8px;
  }

  .nav-link {
    padding: 4px 6px;
    font-size: 0.72rem;
  }

  .hero-stats {
    gap: 12px;
  }

  .stat-card-number {
    font-size: 1.2rem;
  }
}