/* HP全体のデザイン */
:root {
    --main-bg: #0f172a;
    --accent-blue: #3b82f6;
    --text-white: #f8fafc;
    --card-bg: #1e293b;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--main-bg);
    color: var(--text-white);
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ナビゲーション */
nav {
    height: 70px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

nav .container {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    font-size: 1.2rem;
}

.logo img { width: 32px; }

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #cbd5e1;
    font-size: 0.9rem;
    transition: 0.3s;
}

.nav-links a:hover { color: var(--accent-blue); }

/* ヒーローセクション */
.hero {
    padding: 100px 0 60px;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.highlight {
    color: var(--accent-blue);
}

.hero p {
    font-size: 1.2rem;
    color: #94a3b8;
    max-width: 700px;
    margin: 0 auto 40px;
}

/* ボタン */
.btn-primary {
    background: var(--accent-blue);
    color: white;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

.btn-secondary {
    border: 1px solid #475569;
    color: white;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    margin-left: 15px;
    transition: 0.3s;
}

.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(59,130,246,0.3); }

/* モックアッププレビュー */
.preview { padding: 40px 0; }

.mockup {
    background: #334155;
    border-radius: 12px;
    padding: 5px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    overflow: hidden;
}

.mockup-bar {
    padding: 10px;
    display: flex;
    gap: 6px;
}

.dot { width: 10px; height: 10px; background: #475569; border-radius: 50%; }

.mockup-screen {
    height: 450px;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    position: relative;
    border-radius: 0 0 8px 8px;
}

.m-icon { width: 40px; height: 40px; background: rgba(255,255,255,0.1); border-radius: 6px; position: absolute; }
.m-window {
    width: 250px; height: 180px; background: #1f1f2f; border-radius: 8px;
    position: absolute; top: 80px; left: 150px; border: 1px solid #444;
}
.m-titlebar { height: 20px; background: #2a2a3d; border-radius: 8px 8px 0 0; }
.m-taskbar { width: 100%; height: 30px; background: rgba(0,0,0,0.5); position: absolute; bottom: 0; }

/* 特徴 */
.features { padding: 100px 0; }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    transition: 0.3s;
    border: 1px solid rgba(255,255,255,0.05);
}

.feature-card:hover { transform: translateY(-10px); background: #263349; }

.f-icon { font-size: 2.5rem; margin-bottom: 20px; }

.feature-card h3 { margin-bottom: 15px; }
.feature-card p { color: #94a3b8; font-size: 0.95rem; }

footer {
    text-align: center;
    padding: 60px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #64748b;
    font-size: 0.8rem;
}

/* アニメーション */
.fade-in {
    animation: fadeInUp 0.8s ease-out forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}