/* ===========================================
   JAMD - 日本音楽歯科研究会 スタイルシート
   =========================================== */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #1a3a5c;
  --color-primary-light: #2c5f8a;
  --color-accent: #3a8fd4;
  --color-accent-light: #e8f2fc;
  --color-bg: #ffffff;
  --color-bg-alt: #f0f5fa;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #d0dce8;
  --color-white: #ffffff;
  --font-main: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  --max-width: 1100px;
  --header-height: 72px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

ul, ol {
  list-style: none;
}

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 64px 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: 48px;
}

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

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

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

.header-logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.1rem;
}

.header-logo .logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  object-fit: contain;
  flex-shrink: 0;
}

.header-logo .logo-text-sub {
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-text-light);
  letter-spacing: 0.5px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list a {
  display: block;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
}

.nav-list a:hover,
.nav-list a.active {
  background: var(--color-bg-alt);
  color: var(--color-primary-light);
}

.nav-list a.active {
  color: var(--color-accent);
  font-weight: 700;
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  margin: 6px 0;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* --- Main Content --- */
main {
  flex: 1;
  margin-top: var(--header-height);
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, rgba(26, 58, 92, 0.75) 0%, rgba(44, 95, 138, 0.7) 100%),
              url('../images/hero_bg.jpg') center center / cover no-repeat;
  color: var(--color-white);
  padding: 80px 0 72px;
  text-align: center;
}

/* --- Flyer --- */
.flyer-section {
  text-align: center;
}

.flyer-link {
  display: inline-block;
  max-width: 560px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(26, 58, 92, 0.15);
  transition: box-shadow var(--transition), transform var(--transition);
}

.flyer-link:hover {
  box-shadow: 0 8px 32px rgba(26, 58, 92, 0.25);
  transform: translateY(-2px);
}

.flyer-link img {
  width: 100%;
  height: auto;
  display: block;
}

.flyer-caption {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 2px;
}

.hero-title-en {
  font-size: 0.95rem;
  font-weight: 400;
  opacity: 0.8;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.hero-catchphrase {
  font-size: 1.15rem;
  font-weight: 400;
  opacity: 0.9;
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto 32px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 30px;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

/* --- Page Header (sub pages) --- */
.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: 48px 0;
  text-align: center;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-header p {
  font-size: 0.95rem;
  opacity: 0.8;
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 32px 24px;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: 0 4px 20px rgba(26, 58, 92, 0.1);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--color-accent-light);
  border: 2px solid var(--color-accent);
  border-radius: 12px;
  padding: 40px;
  text-align: center;
}

.cta-banner h2 {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.cta-banner p {
  color: var(--color-text-light);
  margin-bottom: 24px;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 12px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-align: center;
  font-family: var(--font-main);
}

.btn-primary {
  background: var(--color-primary-light);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary-light);
  border: 2px solid var(--color-primary-light);
}

.btn-outline:hover {
  background: var(--color-primary-light);
  color: var(--color-white);
}

.btn-large {
  padding: 16px 48px;
  font-size: 1.05rem;
}

/* --- News List --- */
.news-list {
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

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

.news-date {
  flex-shrink: 0;
  font-size: 0.85rem;
  color: var(--color-text-light);
  padding-top: 2px;
  min-width: 110px;
}

.news-tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: 4px;
  background: var(--color-accent);
  color: var(--color-white);
  margin-right: 8px;
  vertical-align: middle;
}

.news-tag.tag-event {
  background: #e67e22;
}

.news-tag.tag-info {
  background: var(--color-accent);
}

.news-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.news-content h3 a {
  color: var(--color-primary);
}

.news-content h3 a:hover {
  color: var(--color-accent);
}

.news-content p {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* --- Sponsor / Host Info --- */
.host-section {
  text-align: center;
}

.host-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.host-item {
  text-align: center;
}

.host-item .host-placeholder {
  width: 160px;
  height: 60px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin: 0 auto 8px;
}

.host-item p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.host-connector {
  font-size: 1.5rem;
  color: var(--color-text-light);
  font-weight: 300;
}

/* --- Meeting / Event --- */
.event-info {
  max-width: 800px;
  margin: 0 auto;
}

.event-info-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 32px;
}

.event-info-table th,
.event-info-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  font-size: 0.95rem;
}

.event-info-table th {
  width: 140px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-bg-alt);
  white-space: nowrap;
}

/* Program Timeline */
.program-timeline {
  max-width: 800px;
  margin: 0 auto;
}

.program-item {
  display: flex;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.program-time {
  flex-shrink: 0;
  width: 120px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary-light);
  padding-top: 2px;
}

.program-detail h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.program-detail p {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* --- Form --- */
.form-section {
  max-width: 680px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.form-group label .required {
  color: #d44;
  font-size: 0.75rem;
  margin-left: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-main);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(58, 143, 212, 0.15);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group .radio-group {
  display: flex;
  gap: 24px;
  padding-top: 4px;
}

.form-group .radio-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  cursor: pointer;
}

.form-group .radio-group input[type="radio"] {
  width: auto;
  margin: 0;
}

.form-note {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 20px 24px;
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  line-height: 1.8;
}

/* --- About / Members --- */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  line-height: 2;
}

.about-content h2 {
  font-size: 1.3rem;
  color: var(--color-primary);
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

.about-content p {
  margin-bottom: 16px;
}

.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.member-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 28px 20px;
  text-align: center;
}

.member-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.5rem;
  color: var(--color-text-light);
}

.member-card h3 {
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.member-card .member-role {
  font-size: 0.8rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.member-card .member-affiliation {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-info-card {
  background: var(--color-bg-alt);
  border-radius: 10px;
  padding: 32px;
}

.contact-info-card h2 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.contact-info-item {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.contact-info-item .info-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--color-primary-light);
  color: var(--color-white);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.contact-info-item .info-text h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.contact-info-item .info-text p {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* --- Footer --- */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  padding: 40px 0 24px;
  font-size: 0.85rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  gap: 32px;
}

.footer-org h3 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 4px;
}

.footer-org .footer-org-en {
  font-size: 0.75rem;
  opacity: 0.6;
  margin-bottom: 12px;
}

.footer-org p {
  line-height: 1.6;
}

.footer-links h4 {
  color: var(--color-white);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
  padding: 3px 0;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 20px;
  text-align: center;
  font-size: 0.75rem;
  opacity: 0.6;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  /* Mobile Nav */
  .nav-toggle {
    display: block;
  }

  .nav-list {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
    overflow-y: auto;
    border-top: 1px solid var(--color-border);
  }

  .nav-list.open {
    display: flex;
  }

  .nav-list a {
    padding: 14px 16px;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }

  /* Hero */
  .hero {
    padding: 56px 0 48px;
  }

  .hero-title {
    font-size: 1.6rem;
  }

  .hero-catchphrase {
    font-size: 1rem;
  }

  /* Sections */
  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .section-subtitle {
    margin-bottom: 32px;
  }

  /* Cards */
  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card {
    padding: 24px 20px;
  }

  /* CTA */
  .cta-banner {
    padding: 28px 20px;
  }

  /* Event */
  .event-info-table th,
  .event-info-table td {
    display: block;
    width: 100%;
  }

  .event-info-table th {
    border-bottom: none;
    padding-bottom: 4px;
  }

  .event-info-table td {
    padding-top: 0;
  }

  .program-item {
    flex-direction: column;
    gap: 8px;
  }

  .program-time {
    width: auto;
  }

  /* News */
  .news-item {
    flex-direction: column;
    gap: 8px;
  }

  .news-date {
    min-width: auto;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* Footer */
  .footer-content {
    flex-direction: column;
  }

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

  .page-header h1 {
    font-size: 1.35rem;
  }

  /* Host */
  .host-logos {
    flex-direction: column;
    gap: 16px;
  }

  .host-connector {
    transform: rotate(90deg);
  }
}