/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ベースフォント */
body {
    font-family: 'Noto Sans JP', sans-serif;
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4, #45b7d1, #f9ca24);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

/* コンテナ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ヘッダー */
.header {
    text-align: center;
    padding: 20px 0;
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
}

.logo-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    padding: 20px 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    width: 100%;
    max-width: 800px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.logo-image {
    height: 48px;
    width: auto;
}

.logo-text {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* メインコンテンツ */
.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
}

.announcement-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    padding: 50px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    max-width: 800px;
    width: 100%;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.card-header {
    margin-bottom: 40px;
    position: relative;
    z-index: 1;
}

.title {
    font-size: 32px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.card-body {
    position: relative;
    z-index: 1;
}

.message-box {
    background: linear-gradient(135deg, #fff5f5, #f0f9ff);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    border: 2px solid #e6f3ff;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.main-message {
    font-size: 24px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
    line-height: 1.8;
}

.sub-message {
    font-size: 16px;
    color: #7f8c8d;
    font-style: italic;
}

.thank-you-section {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    border: 2px solid #dee2e6;
}

.thank-you-section h2 {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 700;
}

.thank-you-section p {
    font-size: 16px;
    color: #495057;
    line-height: 1.8;
}

/* フッター */
.footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
    display: flex;
    justify-content: center;
}

.footer-content {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    padding: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    width: 100%;
    max-width: 800px;
}

.footer-content p {
    color: #666;
    font-size: 14px;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .logo-container {
        padding: 15px 25px;
        margin: 0 10px;
    }
    
    .logo-image {
        height: 36px;
    }
    
    .logo-text {
        font-size: 24px;
    }
    
    .announcement-card {
        padding: 30px 20px;
        margin: 10px;
    }
    
    .title {
        font-size: 24px;
    }
    
    .main-message {
        font-size: 18px;
    }
    
    .sub-message {
        font-size: 14px;
    }
    
    .message-box {
        padding: 25px 20px;
    }
    
    .thank-you-section {
        padding: 25px 20px;
    }
    
    .thank-you-section h2 {
        font-size: 20px;
    }
    
    .thank-you-section p {
        font-size: 14px;
    }
    
    .footer-content {
        margin: 0 10px;
    }
}

@media (max-width: 480px) {
    .logo-container {
        margin: 0 5px;
    }
    
    .logo-image {
        height: 28px;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .announcement-card {
        padding: 20px 15px;
    }
    
    .title {
        font-size: 20px;
    }
    
    .main-message {
        font-size: 16px;
    }
    
    .message-box {
        padding: 20px 15px;
    }
    
    .thank-you-section {
        padding: 20px 15px;
    }
    
    .footer-content {
        margin: 0 5px;
    }
}