/* lifestack LP styles */
:root {
    --color-accent: #fd7e14;
    --color-accent-dark: #e16a05;
    --color-text: #222;
    --color-text-muted: #555;
    --color-bg: #fff;
    --color-bg-soft: #fafaf7;
    --color-border: #e5e5e0;
    --max-width: 880px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Meiryo", system-ui, -apple-system, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent-dark); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--color-accent); }

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ヘッダー */
.site-header {
    border-bottom: 1px solid var(--color-border);
    padding: 14px 0;
    background: var(--color-bg);
    position: sticky;
    top: 0;
    z-index: 10;
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; }
.site-header .logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: 0.02em;
}
.site-header .logo span { color: var(--color-accent); }
.site-header nav a {
    margin-left: 18px;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 14px;
}
.site-header nav a:hover { color: var(--color-accent); }
.site-header nav a.cta {
    background: var(--color-accent);
    color: white;
    padding: 8px 14px;
    border-radius: 6px;
    margin-left: 14px;
}
.site-header nav a.cta:hover { background: var(--color-accent-dark); color: white; }

/* ヒーロー */
.hero {
    padding: 80px 0 60px;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
}
.hero h1 {
    font-size: clamp(28px, 5vw, 44px);
    line-height: 1.3;
    margin-bottom: 20px;
    letter-spacing: 0.01em;
}
.hero h1 .accent { color: var(--color-accent); }
.hero p.lead {
    font-size: clamp(15px, 2.2vw, 18px);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 32px;
}
.btn {
    display: inline-block;
    background: var(--color-accent);
    color: white;
    padding: 14px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: background 0.15s;
}
.btn:hover { background: var(--color-accent-dark); color: white; }
.btn.secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn.secondary:hover { background: var(--color-bg-soft); color: var(--color-text); }
.hero .btn-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* セクション共通 */
section.block {
    padding: 64px 0;
    border-top: 1px solid var(--color-border);
}
section.block.alt { background: var(--color-bg-soft); }
section.block h2 {
    font-size: clamp(22px, 3.5vw, 30px);
    margin-bottom: 12px;
    text-align: center;
}
section.block .subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: 40px;
}

/* 悩み */
.problems {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 30px;
}
.problem-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 24px;
    text-align: center;
}
.problem-card .icon {
    font-size: 28px;
    margin-bottom: 10px;
}
.problem-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}
.problem-card p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* 機能 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}
.feature {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 24px;
    background: white;
}
.feature h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--color-accent);
}
.feature p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* 3ステップ */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    counter-reset: step;
}
.step {
    position: relative;
    padding: 30px 24px 24px;
    text-align: center;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 8px;
}
.step::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    background: var(--color-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}
.step h3 {
    font-size: 17px;
    margin: 8px 0 8px;
}
.step p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* 使い方パターン */
.usecases {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}
.usecase {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 22px;
}
.usecase .badge {
    display: inline-block;
    background: var(--color-accent);
    color: white;
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 12px;
    margin-bottom: 12px;
}
.usecase h3 {
    font-size: 16px;
    margin-bottom: 8px;
}
.usecase p {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}
.usecase .examples {
    list-style: none;
    border-top: 1px dashed var(--color-border);
    padding-top: 10px;
}
.usecase .examples li {
    font-size: 13px;
    padding: 3px 0;
    color: var(--color-text);
}
.usecase .examples li::before {
    content: "✓ ";
    color: var(--color-accent);
    font-weight: 700;
}

/* FAQ */
.faq details {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    margin-bottom: 12px;
    background: white;
    overflow: hidden;
}
.faq summary {
    cursor: pointer;
    padding: 16px 20px;
    font-weight: 600;
    font-size: 15px;
    list-style: none;
    position: relative;
    padding-right: 40px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: "＋";
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-accent);
    font-size: 18px;
}
.faq details[open] summary::after { content: "−"; }
.faq details > p {
    padding: 0 20px 18px;
    font-size: 14px;
    color: var(--color-text-muted);
}

/* CTA section */
.cta-section {
    text-align: center;
    padding: 80px 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-soft) 100%);
}
.cta-section h2 {
    font-size: clamp(22px, 3.5vw, 28px);
    margin-bottom: 14px;
}
.cta-section p {
    color: var(--color-text-muted);
    margin-bottom: 28px;
}

/* フッター */
.site-footer {
    background: var(--color-text);
    color: rgba(255,255,255,0.85);
    padding: 40px 0 24px;
    font-size: 14px;
}
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.site-footer nav a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    margin-right: 18px;
}
.site-footer nav a:hover { color: var(--color-accent); }
.site-footer .copy {
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.15);
    font-size: 12px;
    color: rgba(255,255,255,0.55);
    text-align: center;
    width: 100%;
}

/* 中身ページ (privacy/terms/about) */
.page {
    padding: 50px 0 70px;
}
.page h1 {
    font-size: clamp(24px, 4vw, 32px);
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 10px;
    display: inline-block;
}
.page h2 {
    font-size: 19px;
    margin: 32px 0 12px;
    color: var(--color-text);
}
.page p { margin-bottom: 14px; }
.page ul, .page ol { margin: 0 0 14px 24px; }
.page li { margin-bottom: 6px; }
.page .updated {
    color: var(--color-text-muted);
    font-size: 13px;
    margin-bottom: 30px;
}

/* レスポンシブ */
@media (max-width: 600px) {
    .site-header nav a { margin-left: 10px; font-size: 13px; }
    .site-header nav a.cta { padding: 6px 12px; }
    .hero { padding: 50px 0 40px; }
    section.block { padding: 48px 0; }
    .site-footer .wrap { flex-direction: column; }
}