:root {
  --primary-color: #ff6b6b;
  --secondary-color: #feca57;
  --accent-color: #48dbfb;
  --text-color: #2d3436;
  --bg-sky-top: #a4ebf3;
  --bg-sky-bottom: #e0f7fa;
  --white: #ffffff;
  --card-bg: rgba(255, 255, 255, 0.95);
}

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

body {
  font-family: 'Zen Maru Gothic', sans-serif;
  color: var(--text-color);
  background-color: var(--bg-sky-bottom);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Background Animation */
.bg-animation {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #a4ebf3; /* 綺麗な青空の水色一色 */
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.sun {
  position: absolute;
  top: 5%;
  right: 10%;
  width: 100px;
  height: 100px;
  background-color: #ffeb3b;
  border-radius: 50%;
  box-shadow: 0 0 40px #ffeb3b;
  animation: pulse-sun 4s infinite alternate;
}

.cloud {
  position: absolute;
  background: var(--white);
  border-radius: 50px;
  opacity: 0.8;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.05));
}
.cloud::before, .cloud::after {
  content: '';
  position: absolute;
  background: var(--white);
  border-radius: 50%;
}

.cloud-1 {
  width: 150px; height: 50px; top: 15%; left: -200px;
  animation: float-cloud 40s linear infinite;
}
.cloud-1::before { width: 70px; height: 70px; top: -30px; left: 20px; }
.cloud-1::after { width: 50px; height: 50px; top: -20px; left: 80px; }

.cloud-2 {
  width: 120px; height: 40px; top: 35%; right: -150px;
  animation: float-cloud-rev 35s linear infinite;
}
.cloud-2::before { width: 60px; height: 60px; top: -25px; left: 15px; }
.cloud-2::after { width: 40px; height: 40px; top: -15px; left: 60px; }

.cloud-3 {
  width: 100px; height: 35px; top: 5%; left: 40%;
  animation: float-cloud 50s linear infinite 10s;
}
.cloud-3::before { width: 50px; height: 50px; top: -20px; left: 10px; }
.cloud-3::after { width: 35px; height: 35px; top: -10px; left: 50px; }

/* Page Layout */
.page-wrapper {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 20px;
}

/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: 60px;
  padding-top: 30px;
}

.bubble-container {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.sub-catch {
  background-color: var(--secondary-color);
  color: #d35400;
  padding: 15px 40px;
  border-radius: 40px;
  font-weight: 900;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  border: 4px dashed var(--white);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  position: relative;
  display: inline-block;
  transform: rotate(-2deg);
}
.sub-catch::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 20px 20px 0;
  border-style: solid;
  border-color: var(--secondary-color) transparent transparent transparent;
}

.main-title {
  margin: 20px 0;
  line-height: 1.1;
  transform: rotate(2deg);
}

.title-sub {
  font-size: clamp(2rem, 5vw, 3rem);
  color: #ff9ff3;
  font-weight: 900;
  text-shadow: 2px 2px 0 var(--white), -2px -2px 0 var(--white), 2px -2px 0 var(--white), -2px 2px 0 var(--white), 0 5px 10px rgba(0,0,0,0.2);
  margin-bottom: 5px;
}

.title-main {
  font-size: clamp(2.2rem, 13vw, 6rem);
  font-weight: 900;
  color: var(--primary-color);
  text-shadow: 
    3px 3px 0 var(--white), 
    -3px -3px 0 var(--white), 
    3px -3px 0 var(--white), 
    -3px 3px 0 var(--white), 
    6px 6px 0 #ffeaa7,
    8px 8px 10px rgba(0,0,0,0.3);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2px;
}

.title-main span {
  display: inline-block;
  animation: jumpingText 1.5s infinite;
}

.hero-lead {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 900;
  color: var(--white);
  background: rgba(232, 67, 147, 0.8);
  padding: 15px 30px;
  border-radius: 30px;
  display: inline-block;
  margin-top: 20px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  border: 3px solid var(--white);
}

/* Main Content */
.main-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* Image Section */
.image-section {
  text-align: center;
}

.image-wrapper {
  display: inline-block;
  padding: 15px;
  background: var(--white);
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  transform: rotate(-1deg);
  transition: transform 0.3s ease;
}
.image-wrapper:hover {
  transform: rotate(0deg) scale(1.02);
}

.main-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
}

.image-caption {
  font-size: 0.8rem;
  color: #636e72;
  text-align: right;
  margin-top: 8px;
  font-weight: 500;
}

/* Cards & Layout */
.info-section {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 25px;
}

.card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  border: 4px solid var(--white);
}

.card-title {
  color: var(--accent-color);
  font-size: 1.4rem;
  margin-bottom: 15px;
  text-align: center;
  border-bottom: 2px dashed #b2bec3;
  padding-bottom: 10px;
}

.date-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-color), #ff9ff3);
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}
.date-card .card-title {
  color: var(--white);
  border-bottom-color: rgba(255,255,255,0.3);
}

.date-text {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 10px;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.1);
}
.date-text span {
  font-size: 1.5rem;
}

.time-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: rgba(255,255,255,0.2);
  padding: 5px 15px;
  border-radius: 20px;
}

.desc-card {
  font-size: 1.1rem;
  line-height: 1.8;
}

.feature-list {
  list-style: none;
  margin: 15px 0;
  background: #f1f2f6;
  padding: 15px 20px;
  border-radius: 15px;
}
.feature-list li {
  margin-bottom: 8px;
  font-weight: 700;
}
.feature-list li:last-child {
  margin-bottom: 0;
}

.highlight {
  color: #e84393;
  font-weight: 900;
  font-size: 1.3rem;
  text-align: center;
  margin-top: 20px;
  background: #ffeaa7;
  padding: 10px;
  border-radius: 10px;
}

/* Bottom Section */
.bottom-section {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.map-image-container {
  width: 100%;
  text-align: center;
  margin-top: 10px;
}

.map-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

/* Collab Section */
.collab-section {
  margin-top: 30px;
}

.collab-card {
  border-color: #ff9ff3;
  background: linear-gradient(to bottom right, #ffffff, #fff0f5);
}

.collab-title {
  color: #e84393;
  font-size: 1.6rem;
  text-align: center;
  margin-bottom: 15px;
  font-weight: 900;
  border-bottom: 2px dashed #ff9ff3;
  padding-bottom: 10px;
}

.collab-text {
  font-size: 1.2rem;
  text-align: center;
  line-height: 1.6;
  margin-bottom: 20px;
}

.collab-text strong {
  color: #d35400;
  font-size: 1.3rem;
}

.collab-image-container {
  text-align: center;
}

.collab-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.footer {
  text-align: center;
  margin-top: 50px;
  padding-top: 20px;
  color: #636e72;
  font-size: 0.9rem;
}

.organizer {
  background: rgba(255, 255, 255, 0.7);
  padding: 15px;
  border-radius: 15px;
  margin-bottom: 20px;
  color: #2d3436;
  font-weight: 700;
  font-size: 1.1rem;
}

.organizer p {
  margin: 5px 0;
}

.organizer .org-label {
  color: #e84393;
}

/* Animations */
@keyframes float-cloud {
  0% { left: -200px; }
  100% { left: 100vw; }
}
@keyframes float-cloud-rev {
  0% { right: -200px; }
  100% { right: 100vw; }
}
@keyframes pulse-sun {
  0% { transform: scale(1); box-shadow: 0 0 30px #ffeb3b; }
  100% { transform: scale(1.1); box-shadow: 0 0 60px #ffeb3b; }
}

@keyframes jumpingText {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px) scale(1.05); }
}

.bounce-in {
  animation: bounceIn 1s cubic-bezier(0.175, 0.885, 0.32, 1.275) both;
}
@keyframes bounceIn {
  0% { transform: scale(0.5); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.fade-up {
  animation: fadeUp 0.8s ease-out both;
}
@keyframes fadeUp {
  0% { transform: translateY(30px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

.float-anim {
  animation: float 3s ease-in-out infinite;
}
.float-anim-alt {
  animation: float 4s ease-in-out infinite reverse;
}
@keyframes float {
  0% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0); }
}

.pulse {
  animation: pulseColor 2s infinite;
}
@keyframes pulseColor {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.hover-lift {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.12);
}

/* Responsive */
@media (max-width: 768px) {
  .info-section {
    grid-template-columns: 1fr;
  }
  .main-title {
    font-size: 2.2rem;
  }
  .date-card {
    padding: 20px;
  }
  .date-text {
    font-size: 2.5rem;
  }
  .page-wrapper {
    padding: 20px 15px;
  }
  .extra-banner {
    border-radius: 20px;
    font-size: 1rem;
    padding: 15px;
  }
}