/* --- Global Variables --- */
:root {
    --bg: #ffffff;         /* ベース：白 */
    --bg-light: #fafafa;
    --accent: #0891b2;         /* アクセント：青緑（白背景で読める濃さ） */
    --text: #1a1a1a;   /* 文字：黒 */
    --text-sub: #555555;
    --border: #c6c6c6;
}

/* --- Base Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Poppins', 'Noto Sans JP', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}

.text-accent { color: var(--accent); }

/* --- HEADER --- */
header {
    height: 80px;
    display: flex;
    align-items: center;
    padding: 0 60px;
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(8px);
    z-index: 1000;
}

.header-logo {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-style: italic;
    font-size: 26px;
    color: var(--text);
    text-decoration: none;
}

.header-logo span { color: var(--accent); }

/* --- HERO --- */
.hero {
    padding: 160px 20px 80px;
    text-align: center;
    max-width: 1100px;
    margin: 0 auto;
}

.hero-catch {
    font-family: 'JetBrains Mono', monospace;
    font-style: italic;
    color: var(--accent);
    font-size: clamp(16px, 3vw, 22px);
    letter-spacing: 0.1em;
    margin: 0 0 10px;
}

.hero h1 {
    font-size: clamp(28px, 5vw, 48px);
    line-height: 1.4;
    margin: 0 0 24px;
}

.hero-lead {
    color: var(--text-sub);
    font-size: 16px;
    margin: 0;
}

/* --- COMMON SECTIONS --- */
.section-container {
    padding: 100px 40px;
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.section-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 32px;
    letter-spacing: 0.1em;
    margin: 0 0 12px;
}

.title-underline {
    width: 30px;
    height: 2px;
    background: var(--accent);
    margin: 0 auto 60px;
}

/* --- TOOLS --- */
/* 解説文が長いので、横3列ではなく縦に並べて読みやすくする */
.tool-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 820px;
    margin: 0 auto;
}

.tool-card {
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 36px 40px;
    text-align: left;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.tool-num {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    font-size: 14px;
    letter-spacing: 0.1em;
}

.tool-card h3 {
    font-size: 22px;
    margin: 6px 0 14px;
}

.tool-card p {
    color: var(--text-sub);
    font-size: 15px;
    margin: 0;
}

.tool-card .tool-req {
    font-size: 13px;
    color: #777;
    margin: 18px 0 20px;
    padding-top: 14px;
    border-top: 1px dashed var(--border);
}

/* --- DOWNLOAD BUTTON --- */
.btn-download {
    display: inline-block;
    background-color: var(--accent);
    color: #fff;
    padding: 10px 32px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    transition: 0.3s;
}

.btn-download:hover {
    background-color: var(--text);
    transform: translateY(-2px);
}

.download-note {
    max-width: 820px;
    margin: 30px auto 0;
    font-size: 13px;
    color: var(--text-sub);
    text-align: left;
}

.download-note a { color: var(--accent); }

/* --- CUSTOMIZE --- */
.custom-box {
    max-width: 820px;
    margin: 30px auto 0;
    padding: 24px 28px;
    border-left: 4px solid var(--accent);
    background-color: var(--bg-light);
    text-align: left;
}

.custom-box p {
    color: var(--text-sub);
    font-size: 15px;
    margin: 0;
}

.custom-box .custom-title {
    color: var(--accent);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

/* --- SETUP --- */
.setup {
    border-top: 1px solid var(--border);
    scroll-margin-top: 80px; /* リンクで飛んだとき固定ヘッダーに隠れないように */
}

.setup-lead {
    color: var(--text-sub);
    font-size: 15px;
    margin: 0 0 40px;
}

.setup-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.setup-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 24px;
    text-align: left;
}

.setup-card h3 {
    font-size: 20px;
    margin: 0 0 10px;
}

.setup-card p {
    color: var(--text-sub);
    font-size: 14px;
    margin: 0;
}

/* ボタンの位置を3枚でそろえる */
.setup-card .tool-req {
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px dashed var(--border);
    width: 100%;
    font-size: 13px;
    color: #777;
}

.setup-card .btn-download {
    margin-top: 16px;
}

.setup code,
.tool-req code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    background: #eef2f5;
    padding: 1px 6px;
    border-radius: 4px;
}

.tool-req a { color: var(--accent); }

/* --- MESSAGE --- */
.message {
    border-top: 1px solid var(--border);
}

.message-quote {
    font-size: clamp(22px, 4vw, 32px);
    font-weight: 700;
    color: var(--accent);
    margin: 0 0 20px;
}

.message-text {
    color: var(--text-sub);
    font-size: 16px;
    margin: 0;
}

/* --- FOOTER --- */
footer {
    background-color: var(--bg-light);
    padding: 60px 40px;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 20px; font-size: 12px; margin-bottom: 30px; }
.footer-links a { color: var(--text-sub); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.separator { color: var(--border); }

.corporate-link { margin-bottom: 20px; }
.corporate-link p { font-size: 11px; color: var(--text-sub); margin: 0 0 4px; }
.corporate-link a { color: var(--text); font-weight: 700; font-size: 14px; text-decoration: none; }
.corporate-link a:hover { color: var(--accent); }

.copyright { font-size: 11px; opacity: 0.5; font-family: 'JetBrains Mono', monospace; }

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    header { height: 64px; padding: 0 20px; }
    .header-logo { font-size: 20px; }
    .hero { padding: 120px 16px 60px; }
    .section-container { padding: 70px 16px; }
    .tool-card { padding: 28px 20px; }
    .setup-grid { grid-template-columns: 1fr; }

}