/* --- 共通基本設定 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: #000;
    /* 背景を黒に固定 */
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* --- ヘッダー・ナビゲーション（他ページと共通） --- */
header {
    position: absolute;
    top: 0;
    width: 100%;
    padding: 30px 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ロゴのサイズを修正 */
.header-logo img {
    height: 40px;
    width: auto;
    display: block;
    transition: 0.3s;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

nav ul li a {
    text-decoration: none;
    color: #fff;
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 0.15em;
    position: relative;
    padding-bottom: 8px;
    transition: 0.3s;
}

nav ul li a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: #ff3300;
    transition: 0.3s;
}

nav ul li a:hover {
    color: #ff3300;
}

nav ul li a:hover::after {
    width: 100%;
}

/* --- プレミアム・背景アニメーション --- */
.bg-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: #000;
    overflow: hidden;
}

.aura {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    mix-blend-mode: screen;
    animation: auraMove 20s infinite alternate ease-in-out;
}

.aura-1 {
    width: 80vw;
    height: 80vw;
    background: radial-gradient(circle, rgba(255, 51, 0, 0.25) 0%, transparent 70%);
    top: -20%;
    left: -10%;
}

.aura-2 {
    width: 70vw;
    height: 70vw;
    background: radial-gradient(circle, rgba(255, 120, 0, 0.15) 0%, transparent 70%);
    bottom: -10%;
    right: -10%;
}

@keyframes auraMove {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(10%, 10%) scale(1.1);
    }
}

.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.04;
    pointer-events: none;
    background-image: url('https://upload.wikimedia.org/wikipedia/commons/7/76/1k_Grain.vis.png');
}

/* --- お問い合わせコンテンツ --- */
.container {
    max-width: 600px;
    margin: 160px auto 100px;
    /* ヘッダーを避ける余白 */
    padding: 0 20px;
    text-align: center;
    position: relative;
    z-index: 10;
}

.email-box {
    background: rgba(255, 255, 255, 0.05);
    padding: 30px;
    border-radius: 8px;
    margin-bottom: 50px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.email-box p {
    font-size: 13px;
    color: #888;
}

.email-link {
    color: #ff3300;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    display: block;
    margin-top: 10px;
}

/* フォーム本体 */
form {
    text-align: left;
    background: rgba(10, 10, 10, 0.8);
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    backdrop-filter: blur(20px);
}

.group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}

label {
    font-size: 13px;
    margin-bottom: 8px;
    color: #fff;
}

input,
textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid #333;
    color: #fff;
    padding: 12px;
    border-radius: 4px;
    outline: none;
    font-size: 1rem;
}

input:focus,
textarea:focus {
    border-color: #ff3300;
}

.btn-submit {
    background: #fff;
    color: #000;
    border: none;
    padding: 15px;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    margin-top: 10px;
    width: 100%;
    transition: 0.3s;
}

.btn-submit:hover {
    background: #ff3300;
    color: #fff;
}

#thanks {
    text-align: center;
    padding: 150px 20px;
}

.back-to-top {
    color: #fff;
    display: block;
    margin-top: 40px;
    text-decoration: none;
}

/* スマホ用 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 20px;
    }

    nav ul {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    form {
        padding: 30px 20px;
    }
}