@font-face {
    font-family: 'Noto Sans JP';
    src: url('fonts/NotoSansJP-Regular.ttf') format('truetype');
    font-weight: normal;
}

@font-face {
    font-family: 'Roboto';
    src: url('fonts/Roboto-Regular.ttf') format('truetype');
    font-weight: 400;
}

@font-face {
    font-family: 'Roboto';
    src: url('fonts/Roboto-SemiBold.ttf') format('truetype');
    font-weight: 700;
}

* { box-sizing:border-box;}

body {
    font-family: 'Roboto', 'Noto Sans JP', sans-serif;
    background-color: #b4b5bd;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    width: 100%;
    background-color: #ffffff;
    padding: 60px 40px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    text-align: center;
}

h1 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 40px;
    letter-spacing: 0.05em;
    color: #444;
        }

.message {
    font-size: 16px;
    line-height: 2;
    margin-bottom: 50px;
    font-weight: 500;
    color: #555;
}

/* スマホ表示などで改行がおかしくならないよう調整 */
.message p {
     margin: 0 0 1em 0;
}

.date-highlight {
    white-space: nowrap;
    font-weight: bold;
}

/* ボタンエリア */
.button-container {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

/* ボタン共通スタイル */
.card-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 300px;
    height: 300px;
    text-decoration: none;
    border-radius: 30px;
    color: #fff;
    transition: all 0.3s ease;
    position: relative;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    top: 0;
    overflow: hidden;
    background-color: #111;
}

.card-btn:hover {
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    transform: translateY(-5px);
    background-color: #000;
}

.card-btn:active {
    transform: translateY(2px) scale(0.98);
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
}

/* AMDボタン */
.btn-amd { 
    padding: 20px;
}

.amd-logo-img { 
    max-width: 80%; 
    height: auto; 
    margin-bottom: 20px; 
    object-fit: contain;
}

.amd-company-name { 
    font-size: 13px;
    font-weight: bold;
    line-height: 1.5;
    opacity: 0.9;
}

/* Instagramボタン */
.btn-insta { 
    padding: 20px;
}

.insta-logo-img {
    width: 110px;
    height: 110px;
    margin-bottom: 20px;
    object-fit: contain;
}
        
.insta-id { 
    font-size: 24px; font-weight: bold;
}

.footer-text {
    font-size: 15px; 
    font-weight: bold; 
    margin-top: 20px; 
    color: #666;
}

.copyright { 
    margin-top: 40px; 
    font-size: 11px; 
    color: #aaa; 
    font-weight: normal; 
    font-family: 'Roboto', sans-serif; 
}

@media (max-width: 680px) {
body { 
    padding: 15px;
}

.container { 
    padding: 40px 20px; 
}

.card-btn { 
    width: 100%; max-width: 320px; height: 250px;
}

h1 { 
    font-size: 22px; margin-bottom: 30px;
}

.message { 
    font-size: 14px; text-align: left; display: inline-block;
}

.amd-logo-img { 
    max-width: 70%;
}
}