/* style.css */
:root {
    --primary-color: #0070f3;
    --text-color: #333;
    --light-text: #666;
    --bg-color: #fafafa;
    --card-bg: #ffffff;
    --border-color: #eee;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
}

/* Header & Nav */
header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

header h1 {
    margin: 0 0 1rem 0;
    font-size: 1.5rem;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
    justify-content: flex-start;
}

nav a {
    text-decoration: none;
    color: var(--light-text);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s;
}

nav a:hover {
    color: var(--primary-color);
}

/* Main Content Area */
main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    min-height: 70vh;
}

/* アプリ詳細（DTL）ページや汎用ページの装飾 */
h1 { font-size: 2rem; margin-bottom: 1rem; }
h2 { font-size: 1.5rem; margin-top: 2rem; border-left: 4px solid var(--primary-color); padding-left: 1rem; }

.content-box {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 1rem;
    margin-top: 4rem;
    background-color: #f0f0f0;
    color: var(--light-text);
    font-size: 0.85rem;
}

footer hr {
    border: 0;
    border-top: 1px solid #ddd;
    margin-bottom: 1.5rem;
    max-width: 600px;
}

.footer-links a {
    color: var(--light-text);
    text-decoration: none;
    margin: 0 10px;
}

.footer-links a:hover {
    text-decoration: underline;
}