/*
====================================
長野県CT撮影技術研究会
Top Page Design Proposal
Modern & Progressive Design
====================================
*/

/* ====================================
   CSS Variables - Color Palette
   ==================================== */

@media screen and (min-width: 1201px) {
    html { font-size: 15px; }
  }

@media screen and (min-width: 768px) and (max-width: 1200px)  {
            html {
                font-size: calc(1400 / 1280 * 1vw);
            }
        }

@media screen and (min-width: 400px) and (max-width: 767px)  {
            html {
                font-size: calc(1400 / 384 * 1vw);
            }
            /* p {
                font-size: 12.8px;
            } */
        }

@media screen and (max-width: 399px)  {
            html {
                font-size: calc(1400 / 900 * 1vw);
            }
        }


:root {
  /* Primary Colors - Professional Blue-Grey Palette */
  --color-primary: #2c5f7c;
  --color-primary-light: #3d7a9e;
  --color-primary-dark: #1e4558;
  --color-primary-pale: #e8f1f5;

  /* Accent Colors */
  --color-accent: #00a9a5;
  --color-accent-hover: #008b88;
  --color-secondary: #ea6a47;
  --color-secondary-hover: #d85a39;

  /* Neutral Colors */
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #4a4a4a;
  --color-text-light: #7a7a7a;
  --color-border: #e0e0e0;
  --color-bg-light: #f8f9fa;
  --color-white: #ffffff;

  /* Shadows */
  --shadow-sm: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.06);
  --shadow-md: 0 0.25rem 1rem rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 0.5rem 2rem rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 1rem 3rem rgba(0, 0, 0, 0.15);

  /* Typography */
  --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 624.9375rem;

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

/* ====================================
   Reset & Base Styles
   ==================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 1rem;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-primary);
  line-height: 1.7;
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

ul, ol {
  list-style: none;
}

/* ====================================
   Container & Utilities
   ==================================== */
.container {
  max-width: 75rem;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.section-spacing {
  padding: var(--spacing-3xl) 0;
}

/* ====================================
   Animation Classes
   ==================================== */
.fade-in {
  opacity: 0;
  animation: fadeIn 0.8s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }
.fade-in:nth-child(5) { animation-delay: 0.5s; }

.fade-in-up {
  opacity: 0;
  transform: translateY(1.875rem);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-2.5rem);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(2.5rem);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ====================================
   Header
   ==================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.header-inner {
  max-width: 87.5rem;
  margin: 0 auto;
  padding: 4rem 2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.header-left {
  flex-shrink: 0;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-primary);
  transition: color var(--transition-base), transform var(--transition-base);
}

.social-link:hover {
  color: var(--color-accent);
  transform: translateY(-0.125rem);
}

.header-center {
  flex: 1;
  display: flex;
  justify-content: center;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: transform var(--transition-base);
}

.site-logo:hover {
  transform: translateY(-0.125rem);
}

.logo-icon {
  width: 3rem;
  height: 3rem;
  color: var(--color-primary);
  flex-shrink: 0;
}

.site-title {
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.header-nav {
  flex-shrink: 0;
}

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

.nav-menu a {
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  position: relative;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-base);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 0.125rem;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

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

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

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.3125rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.hamburger-line {
  width: 1.5rem;
  height: 0.125rem;
  background: var(--color-primary);
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(0.375rem, 0.375rem);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(0.375rem, -0.375rem);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1000;
}

.mobile-menu-overlay.active {
  display: block;
  opacity: 1;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 20rem;
  height: 100vh;
  background: var(--color-white);
  box-shadow: -0.25rem 0 1.25rem rgba(0, 0, 0, 0.1);
  transition: right 0.3s ease;
  z-index: 1001;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 0.0625rem solid var(--color-border);
}

.mobile-menu-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-menu-logo img {
  width: 2.5rem;
  height: 2.5rem;
}

.mobile-menu-logo span {
  font-size: 0.9rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

.mobile-menu-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-text-dark);
  transition: color var(--transition-base);
}

.mobile-menu-close:hover {
  color: var(--color-accent);
}

.mobile-nav-menu {
  flex: 1;
  padding: var(--spacing-lg) 0;
}

.mobile-nav-menu li {
  border-bottom: 0.0625rem solid var(--color-border);
}

.mobile-nav-menu a {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-dark);
  transition: all var(--transition-base);
}

.mobile-nav-menu a:hover,
.mobile-nav-menu a:active {
  background: rgba(0, 169, 165, 0.05);
  color: var(--color-accent);
  padding-left: calc(var(--spacing-lg) + 0.5rem);
}

.mobile-menu-footer {
  padding: var(--spacing-lg);
  border-top: 0.0625rem solid var(--color-border);
}

.mobile-social-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: var(--spacing-md);
  background: rgba(44, 95, 124, 0.05);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-base);
}

.mobile-social-link:hover {
  background: rgba(44, 95, 124, 0.1);
  color: var(--color-accent);
}

.mobile-social-link svg {
  width: 1.5rem;
  height: 1.5rem;
}

/* ====================================
   Hero Section
   ==================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 5rem;
}

.hero-background {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(135deg, rgba(232, 241, 245, 0.85) 0%, rgba(255, 255, 255, 0.60) 50%, rgba(232, 241, 245, 0.85) 100%),
    url('../images/kv-bg.avif');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}

.hero-background::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(0, 169, 165, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(44, 95, 124, 0.08) 0%, transparent 50%);
  animation: heroBackgroundMove 20s ease infinite;
}

@keyframes heroBackgroundMove {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(1.25rem, 1.25rem); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 0%, rgba(255, 255, 255, 0.3) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 56.25rem;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.hero-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.hero-title {
  margin-bottom: var(--spacing-lg);
}

.hero-title-main {
  display: block;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.02em;
}

.hero-title-sub {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  line-height: 1.3;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-2xl);
  font-weight: var(--font-weight-light);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(0.625rem);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

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

.stat-number {
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  font-weight: var(--font-weight-medium);
  animation: scrollBounce 2s ease infinite;
}

.scroll-line {
  width: 0.0625rem;
  height: 1.875rem;
  background: var(--color-text-light);
  margin: var(--spacing-xs) auto 0;
  animation: scrollLineGrow 2s ease infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 0.625rem); }
}

@keyframes scrollLineGrow {
  0%, 100% { height: 1.875rem; opacity: 1; }
  50% { height: 2.5rem; opacity: 0.5; }
}

/* ====================================
   Buttons
   ==================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 0.125rem solid transparent;
  transition: all var(--transition-base);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-0.125rem);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--color-secondary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  background: var(--color-secondary-hover);
  transform: translateY(-0.125rem);
  box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-0.125rem);
}

.btn-full {
  width: 100%;
}

/* ====================================
   Section Headers
   ==================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-primary-pale);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.section-description {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 43.75rem;
  margin: 0 auto;
}

/* ====================================
   Seminar Section
   ==================================== */
.seminar-section {
  background: var(--color-bg-light);
}

.seminar-card {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--spacing-2xl);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.seminar-card:hover {
  transform: translateY(-0.5rem);
  box-shadow: var(--shadow-xl);
}

.seminar-card-image-link {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.seminar-card-image {
  position: relative;
  overflow: hidden;
}

.seminar-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  padding: 2rem;
  transition: transform var(--transition-slow);
}

.seminar-card:hover .seminar-card-image img {
  transform: scale(1.05);
}

.seminar-card-badge {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-secondary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: var(--font-weight-semibold);
  box-shadow: var(--shadow-md);
}

.seminar-card-content {
  padding: var(--spacing-2xl);
  display: flex;
  flex-direction: column;
}

.seminar-meta {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.seminar-date {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
  font-size: 0.95rem;
}

.seminar-time {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.seminar-title {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  line-height: 1.4;
}

.seminar-excerpt {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
  flex: 1;
}

.seminar-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.seminar-info-item {
  display: flex;
  gap: var(--spacing-md);
}

.info-label {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  min-width: 3.75rem;
}

.info-value {
  color: var(--color-text-secondary);
}

.seminar-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: nowrap;
}

/* ====================================
   About Section
   ==================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-content .section-badge {
  margin-bottom: var(--spacing-md);
}

.about-content .section-title {
  text-align: left;
  margin-bottom: var(--spacing-lg);
}

.about-text {
  margin-bottom: var(--spacing-xl);
}

.about-text p {
  color: var(--color-text-secondary);
  line-height: 1.9;
  margin-bottom: var(--spacing-md);
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.feature-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-item:hover {
  transform: translateX(0.5rem);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  flex-shrink: 0;
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  border-radius: var(--radius-md);
}

.feature-content h4 {
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.feature-content p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.about-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
  justify-content: center;
}

.about-visual {
  position: relative;
  padding-bottom: 5rem;
}

.about-image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: visible;
  box-shadow: var(--shadow-xl);
}

.about-image-wrapper img {
  width: 100%;
  display: block;
  border-radius: var(--radius-xl);
  transition: transform var(--transition-slow);
}

.about-image-wrapper:hover img {
  transform: scale(1.05);
}

.about-card {
  position: absolute;
  bottom: -4.375rem;
  left: var(--spacing-lg);
  right: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(0.625rem);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.about-card-left {
  flex: 1;
}

.about-card-right {
  flex-shrink: 0;
}

.about-card h4 {
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
}

.about-card .name {
  font-size: 1.3rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.about-card .org {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.about-card .cert {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
}

.btn-greeting {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  white-space: nowrap;
}

.btn-greeting:hover {
  transform: translateY(-0.125rem);
  box-shadow: var(--shadow-lg);
}

.btn-greeting svg {
  flex-shrink: 0;
}

/* Greeting Modal */
.greeting-modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(0.25rem);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.greeting-modal-content {
  background-color: white;
  margin: 5% auto;
  padding: 0;
  border-radius: var(--radius-xl);
  max-width: 43.75rem;
  width: 90%;
  box-shadow: 0 0.625rem 2.5rem rgba(0, 0, 0, 0.2);
  animation: slideIn 0.3s ease;
  max-height: 85vh;
  overflow-y: auto;
}

@keyframes slideIn {
  from {
    transform: translateY(-3.125rem);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.greeting-modal-close {
  position: sticky;
  top: 0;
  right: 0;
  float: right;
  font-size: 2rem;
  font-weight: bold;
  color: var(--color-text-light);
  cursor: pointer;
  padding: 1rem 1.5rem;
  background: white;
  z-index: 10;
  border-radius: 0 var(--radius-xl) 0 0;
}

.greeting-modal-close:hover,
.greeting-modal-close:focus {
  color: var(--color-primary);
}

.greeting-modal-title {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  padding: 1.5rem 2rem 1rem;
  border-bottom: 0.125rem solid var(--color-border);
  margin: 0;
}

.greeting-modal-body {
  padding: 2rem;
  line-height: 1.9;
  color: var(--color-text-body);
}

.greeting-modal-body p {
  margin-bottom: 1.5em;
  font-size: 1rem;
  text-align: justify;
}

.greeting-modal-signature {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 0.125rem solid var(--color-border);
  text-align: right;
}

.greeting-modal-signature p {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
  margin-bottom: 0.25rem;
}

.greeting-modal-signature p:last-child {
  color: var(--color-primary);
  font-size: 1.1rem;
}

/* ====================================
   Members Section
   ==================================== */
.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17.5rem, 1fr));
  gap: var(--spacing-xl);
}

.member-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.member-card:hover {
  transform: translateY(-0.5rem);
  box-shadow: var(--shadow-xl);
}

.member-image {
  position: relative;
  height: 20rem;
  overflow: hidden;
}

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

.member-card:hover .member-image img {
  transform: scale(1.1);
}

.member-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(44, 95, 124, 0.95) 0%, transparent 100%);
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-lg);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.member-card:hover .member-overlay {
  opacity: 1;
}

.member-bio {
  color: var(--color-white);
  font-size: 0.95rem;
  font-weight: var(--font-weight-medium);
}

.member-info {
  padding: var(--spacing-lg);
}

.member-name {
  font-size: 1.3rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.member-position {
  font-size: 0.9rem;
  color: var(--color-accent);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.member-org {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.member-cert {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ====================================
   Archive Section
   ==================================== */
.archive-section {
  background: var(--color-bg-light);
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(21.875rem, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.archive-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.archive-card:hover {
  transform: translateY(-0.25rem);
  box-shadow: var(--shadow-lg);
}

.archive-card-link {
  display: flex;
  flex-direction: column;
  flex: 1;
  text-decoration: none;
  color: inherit;
}

.archive-image {
  position: relative;
  height: 13.75rem;
  overflow: hidden;
}

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

.archive-card:hover .archive-image img {
  transform: scale(1.05);
}

.archive-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: var(--font-weight-semibold);
  box-shadow: var(--shadow-md);
}

.archive-content {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.archive-date {
  display: block;
  color: var(--color-text-light);
  font-size: 0.85rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-sm);
}

.archive-title {
  font-size: 1.2rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.archive-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  flex: 1;
}

.archive-footer {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 0.0625rem solid var(--color-border);
}

.archive-link,
.archive-pdf {
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-accent);
  transition: color var(--transition-base);
}

.archive-link:hover,
.archive-pdf:hover {
  color: var(--color-accent-hover);
}

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

/* ====================================
   Contact Section
   ==================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.contact-info .section-badge {
  margin-bottom: var(--spacing-md);
}

.contact-info .section-title {
  text-align: left;
  margin-bottom: var(--spacing-md);
}

.contact-description {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-2xl);
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.contact-item:hover {
  transform: translateX(0.5rem);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  border-radius: var(--radius-md);
}

.contact-details h4 {
  font-size: 0.9rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
}

.contact-details a {
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-base);
}

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

.contact-details p {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.contact-form-wrapper {
  background: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* Snow Monkey Forms スタイル調整 */
.smf-form-container {
  width: 100%;
}

.contact-form-wrapper .smf-form {
  max-width: 100%;
}

.contact-form-wrapper .smf-form-field {
  margin-bottom: var(--spacing-lg);
}

.contact-form-wrapper .smf-form-field label {
  display: block;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-xs);
  font-size: 0.95rem;
}

.contact-form-wrapper .smf-form-field input[type="text"],
.contact-form-wrapper .smf-form-field input[type="email"],
.contact-form-wrapper .smf-form-field input[type="tel"],
.contact-form-wrapper .smf-form-field textarea,
.contact-form-wrapper .smf-form-field select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 0.125rem solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-base);
  background: var(--color-white);
}

.contact-form-wrapper .smf-form-field input:focus,
.contact-form-wrapper .smf-form-field textarea:focus,
.contact-form-wrapper .smf-form-field select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 0.1875rem rgba(0, 169, 165, 0.1);
}

.contact-form-wrapper .smf-form-field textarea {
  min-height: 7.5rem;
  resize: vertical;
}

.contact-form-wrapper .smf-submit-button,
.contact-form-wrapper button[type="submit"] {
  width: 100%;
  padding: 0.875rem 2rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1.05rem;
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-base);
  margin-top: var(--spacing-md);
}

.contact-form-wrapper .smf-submit-button:hover,
.contact-form-wrapper button[type="submit"]:hover {
  transform: translateY(-0.125rem);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 169, 165, 0.3);
}

.contact-form-wrapper .smf-error-messages {
  color: #dc2626;
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.contact-form-wrapper .smf-success-message {
  padding: var(--spacing-md);
  background: rgba(34, 197, 94, 0.1);
  border-left: 0.25rem solid #22c55e;
  border-radius: var(--radius-md);
  color: #166534;
  margin-bottom: var(--spacing-lg);
}

.contact-form-privacy {
  text-align: center;
  padding-top: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  border-top: 0.0625rem solid var(--color-border);
}

.contact-form-privacy a {
  color: var(--color-accent);
  text-decoration: underline;
  font-weight: var(--font-weight-medium);
  font-size: 0.95rem;
  transition: color var(--transition-base);
}

.contact-form-privacy a:hover {
  color: var(--color-primary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  font-size: 0.95rem;
}

.required {
  color: var(--color-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--spacing-md);
  border: 0.125rem solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: 1rem;
  color: var(--color-text-primary);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 0.1875rem rgba(0, 169, 165, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 7.5rem;
}

.form-privacy {
  margin-top: var(--spacing-sm);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  cursor: pointer;
}

.checkbox-label a {
  color: var(--color-accent);
  text-decoration: underline;
}

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

/* ====================================
   Links Section
   ==================================== */
.links-section {
  background: var(--color-bg-light);
}

.links-categories {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl);
}

.links-category {
  background: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

/* 共催メーカーカテゴリーの特別スタイル */
.links-category-kyosai-maker,
.links-category-co-sponsor,
.links-category-sponsor {
  background: linear-gradient(135deg, rgba(44, 95, 124, 0.04) 0%, rgba(0, 169, 165, 0.04) 100%);
  border-left: 0.3125rem solid var(--color-accent);
  box-shadow: 0 0.125rem 0.75rem rgba(0, 169, 165, 0.08);
  position: relative;
}

.links-category-kyosai-maker .category-title::before,
.links-category-co-sponsor .category-title::before,
.links-category-sponsor .category-title::before {
  content: '共催';
  display: inline-block;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
  color: var(--color-white);
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  padding: 0.25rem 0.625rem;
  border-radius: 0.25rem;
  margin-right: 0.75rem;
  vertical-align: middle;
  letter-spacing: 0.05em;
}

/* 共催メーカーカテゴリ内のリンクカードスタイル */
.links-category-kyosai-maker .link-card,
.links-category-co-sponsor .link-card,
.links-category-sponsor .link-card {
  border: 0.0625rem solid rgba(0, 169, 165, 0.15);
}

.links-category-kyosai-maker .link-card:hover,
.links-category-co-sponsor .link-card:hover,
.links-category-sponsor .link-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0.25rem 1rem rgba(0, 169, 165, 0.15);
}

.links-category-kyosai-maker .link-icon,
.links-category-co-sponsor .link-icon,
.links-category-sponsor .link-icon {
  background: linear-gradient(135deg, rgba(0, 169, 165, 0.08) 0%, rgba(44, 95, 124, 0.08) 100%);
}

.category-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 0.1875rem solid var(--color-accent);
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17.5rem, 1fr));
  gap: var(--spacing-md);
}

.link-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  border: 0.125rem solid transparent;
  transition: all var(--transition-base);
}

.link-card:hover {
  background: var(--color-white);
  border-color: var(--color-accent);
  transform: translateY(-0.125rem);
  box-shadow: var(--shadow-md);
}

.link-icon {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.link-card:hover .link-icon {
  background: var(--color-accent);
  color: var(--color-white);
  transform: rotate(5deg);
}

.link-content h4 {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  line-height: 1.3;
}

.link-content p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.4;
}

/* ====================================
   Footer
   ==================================== */
.site-footer {
  background: var(--color-primary-dark);
  color: var(--color-white);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 0.0625rem solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer-logo .logo-icon {
  color: var(--color-accent);
}

.footer-logo .site-title {
  color: var(--color-white);
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-column a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: color var(--transition-base), transform var(--transition-base);
  display: inline-block;
}

.footer-column a:hover {
  color: var(--color-white);
  transform: translateX(0.25rem);
}

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

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* ====================================
   Responsive Design
   ==================================== */
@media (max-width: 1024px) {
  .header-nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .seminar-card {
    grid-template-columns: 1fr;
  }

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

  .about-visual {
    padding-bottom: 3.75rem;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
  }


  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-3xl: 4rem;
    --spacing-2xl: 3rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .about-card {
    bottom: -3.125rem;
    left: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-md);
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-md);
  }

  .btn-greeting {
    width: 100%;
    flex-direction: row;
    justify-content: center;
    padding: 0.75rem 1rem;
  }

  .greeting-modal-content {
    margin: 10% auto;
    width: 95%;
  }

  .greeting-modal-title {
    font-size: 1.4rem;
    padding: 1.25rem 1.5rem 0.875rem;
  }

  .greeting-modal-body {
    padding: 1.5rem;
  }

  .greeting-modal-body p {
    font-size: 0.9rem;
  }

  .about-actions {
    flex-direction: column;
  }

  .about-actions .btn {
    width: 100%;
  }

  .members-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }
  .member-image {
    height: clamp(15rem, 30vw, 20rem);
  }
  /* .member-image img {
    height: 13rem;
    width: auto;
  } */

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

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

  .footer-links {
    grid-template-columns: 1fr;
  }

  .site-logo {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .site-title {
    font-size: 0.9rem;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .about-card {
    bottom: -9.125rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: var(--spacing-sm);
  }

  .section-spacing {
    padding: var(--spacing-2xl) 0;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .contact-info {
    min-width: 0;
  }
  
.contact-details a {
  overflow-wrap: anywhere;
}


  .seminar-card-content,
  .contact-form-wrapper {
    padding: var(--spacing-lg);
  }

  .seminar-actions {
    flex-wrap: wrap;

  }
}