/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: #f8fafc;
    color: #1e293b;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.pc-only {
    display: inline;
}

/* Header */
.site-header {
    background-color: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.brand-logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 0.05em;
    color: #0f172a;
    text-decoration: none;
}

.brand-logo span {
    color: #2563eb;
}

.brand-sub {
    font-size: 0.72rem;
    color: #64748b;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.search-box {
    display: flex;
    align-items: center;
    background-color: #f1f5f9;
    border: 1px solid #cbd5e1;
    border-radius: 9999px;
    padding: 8px 16px;
    width: 100%;
    max-width: 340px;
    gap: 8px;
    transition: all 0.2s ease;
}

.search-box:focus-within {
    border-color: #2563eb;
    background-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    width: 100%;
    font-size: 0.875rem;
    color: #0f172a;
}

/* Hero Section (モダンな微細グリッド＋グラデーション) */
.hero-section {
    background: 
        radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.15) 0%, transparent 75%),
        linear-gradient(135deg, #0b0f19 0%, #111827 50%, #1e293b 100%);
    color: #ffffff;
    padding: 70px 24px;
    text-align: center;
    position: relative;
    border-bottom: 1px solid #1e293b;
}

.hero-inner {
    max-width: 840px;
    margin: 0 auto;
}

.hero-tag {
    display: inline-block;
    background: rgba(37, 99, 235, 0.15);
    border: 1px solid rgba(96, 165, 250, 0.3);
    color: #60a5fa;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    padding: 6px 16px;
    border-radius: 9999px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 2.4rem;
    font-weight: 900;
    letter-spacing: -0.01em;
    margin-bottom: 18px;
    line-height: 1.35;
    word-break: keep-all;
    overflow-wrap: break-word;
}

.hero-desc {
    font-size: 1.05rem;
    color: #94a3b8;
    line-height: 1.85;
    word-break: normal;
    overflow-wrap: break-word;
}

/* Main Container */
.main-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

/* Category Filter Nav */
.category-nav {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 16px;
    margin-bottom: 32px;
    scrollbar-width: none;
}

.category-nav::-webkit-scrollbar {
    display: none;
}

.cat-btn {
    white-space: nowrap;
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    padding: 10px 20px;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    color: #475569;
    cursor: pointer;
    transition: all 0.2s ease;
}

.cat-btn:hover {
    background-color: #f1f5f9;
    color: #0f172a;
}

.cat-btn.active {
    background-color: #0f172a;
    color: #ffffff;
    border-color: #0f172a;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

/* Catalog Grid */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

/* Product Card */
.product-card {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all 0.25s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.1);
    border-color: #cbd5e1;
}

.card-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background-color: #eff6ff;
    color: #2563eb;
    border: 1px solid #bfdbfe;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 9999px;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.card-category {
    font-size: 0.75rem;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 10px;
    line-height: 1.4;
}

.card-catch {
    font-size: 0.85rem;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid #f1f5f9;
}

.card-roi {
    font-size: 0.75rem;
    color: #64748b;
}

.card-roi strong {
    color: #f59e0b;
    letter-spacing: 2px;
}

.card-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: #0f172a;
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 8px;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.card-btn:hover {
    background-color: #2563eb;
}

/* No Result */
.no-result {
    text-align: center;
    padding: 60px 20px;
    color: #64748b;
    font-size: 1rem;
}

/* Footer */
.site-footer {
    background-color: #0f172a;
    color: #94a3b8;
    padding: 40px 24px;
    border-top: 1px solid #1e293b;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand h2 {
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 800;
}

.footer-brand p {
    font-size: 0.85rem;
    color: #64748b;
}

.footer-note p {
    font-size: 0.75rem;
    line-height: 1.8;
}

/* スマホ表示（レスポンシブ最適化） */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        align-items: stretch;
        padding: 14px 16px;
    }
    .search-box {
        max-width: 100%;
    }
    .hero-section {
        padding: 44px 16px;
    }
    .hero-title {
        font-size: 1.65rem;
        line-height: 1.4;
    }
    .hero-desc {
        font-size: 0.9rem;
        line-height: 1.75;
    }
    .pc-only {
        display: none;
    }
    .main-container {
        padding: 24px 16px 60px;
    }
    .catalog-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}