/* 変数の定義 */
:root {
    --mc-green: #388E3C;
    --mc-dirt: #795548;
    --line-green: #06C755;
    --accent-yellow: #FFD700;
}

/* 全体の基本設定 */
body {
    font-family: 'Zen Kaku Gothic New', 'M PLUS Rounded 1c', sans-serif;
    background-color: #0d1117; 
    color: #e6edf3;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* ヒーローエリアの演出 */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(to bottom, rgba(13, 17, 23, 0.2), rgba(13, 17, 23, 1)),
        url('back.png');
    background-size: cover;
    background-position: center 65%;
    background-repeat: no-repeat;
    z-index: 0;
    transform: scale(1.1);
    filter: brightness(0.8) contrast(1.1);
}

/* マイクラ風ロゴアニメーション */
.logo-3d {
    font-weight: 900;
    font-size: clamp(3.5rem, 12vw, 8rem);
    color: #fff;
    text-shadow: 
        0 1px 0 #bbb, 0 2px 0 #b5b5b5, 0 3px 0 #aaa, 0 4px 0 #a5a5a5, 
        0 5px 0 #999, 0 6px 1px rgba(0,0,0,.1), 0 0 5px rgba(0,0,0,.1), 
        0 1px 3px rgba(0,0,0,.3), 0 3px 5px rgba(0,0,0,.2), 0 5px 10px rgba(0,0,0,.25);
    letter-spacing: -0.02em;
    line-height: 0.9;
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
    0%, 100% { transform: translateY(0) rotate(-1deg); }
    50% { transform: translateY(-15px) rotate(1deg); }
}

/* ガラスモーフィズム */
.glass-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 2.5rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

/* LINEボタン */
.line-btn {
    background: var(--line-green);
    box-shadow: 0 6px 0 #04943f;
    transition: all 0.1s;
}

.line-btn:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 #04943f;
}

/* セクションタイトル装飾 */
.section-header::before {
    content: '';
    display: block;
    width: 40px;
    height: 6px;
    background: var(--mc-green);
    margin: 0 auto 1.5rem;
    border-radius: 3px;
}

/* アニメーション用（ふわっと出るやつ） */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* アコーディオン（Q&A） */
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary { list-style: none; }