:root {
    --brand-green: #01894d;
    --brand-orange: #f39800;
    --bg-color: #f8fafb;
    --card-bg: #ffffff;
    --text-main: #333333;
    --text-sub: #666666;
    --border-color: #e5e7eb;
    --accent-color: #f0fdf4;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius: 12px;
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

/* Header */
.main-header {
    background-color: var(--brand-green);
    border-bottom: 2px solid var(--brand-orange);
    padding: 12px 0;
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-header-inner {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.title-icon {
    width: 28px;
    height: 28px;
}

.brand-logo {
    font-size: 1.25rem;
    font-weight: 700;
}

.header-link {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background 0.2s;
}

.header-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.container {
    max-width: 1000px;
    margin: 30px auto;
    padding: 0 20px;
}

/* Info Section (Accordion) */
.info-section {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 24px;
    overflow: hidden;
}

.info-header {
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background: #fcfcfc;
}

.info-header h2 {
    font-size: 1.1rem;
    color: var(--brand-green);
    display: flex;
    align-items: center;
    gap: 8px;
}

.toggle-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s;
}

.info-section.collapsed .toggle-icon {
    transform: rotate(-180deg);
}

.info-content {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: block;
}

.info-section.collapsed .info-content {
    display: none;
}

.usage-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 15px;
}

.usage-step {
    padding-left: 35px;
    position: relative;
    font-size: 0.9rem;
}

.usage-step::before {
    content: attr(data-step);
    position: absolute;
    left: 0;
    top: 0;
    width: 24px;
    height: 24px;
    background: var(--brand-green);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

/* Search Card */
.card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.search-card {
    border-top: 4px solid var(--brand-orange);
}

.form-title {
    font-size: 1.2rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-number {
    background: var(--brand-orange);
    color: #fff;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.9rem;
    font-weight: bold;
}

.filter-group {
    margin-bottom: 20px;
}

.filter-group label,
.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-main);
}

.age-filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: #fff;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s;
    color: var(--text-sub);
}

.filter-btn:hover {
    background: var(--accent-color);
    border-color: var(--brand-green);
    color: var(--brand-green);
}

.filter-btn.active {
    background: var(--brand-green);
    border-color: var(--brand-green);
    color: #fff;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

#searchInput {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
    outline: none;
}

#searchInput:focus {
    border-color: var(--brand-green);
}

/* Results */
.results-header {
    margin-bottom: 15px;
    padding: 0 5px;
    font-weight: 600;
    color: var(--text-sub);
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.result-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 12px 16px;
    display: grid;
    grid-template-columns: 1fr 180px;
    gap: 20px;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.result-card:hover {
    transform: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.product-header-line {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.product-age-badge {
    padding: 2px 8px;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--brand-orange);
    color: #fff;
    border-radius: 4px;
    white-space: nowrap;
}

.card-main-info {
    display: flex;
    flex-direction: column;
}

.product-manufacturer {
    font-size: 0.8rem;
    color: var(--text-sub);
}

.product-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--brand-green);
}

.info-content-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.tag {
    font-size: 0.7rem;
    background: #f3f4f6;
    padding: 1px 6px;
    border-radius: 4px;
    color: var(--text-main);
}

.tag.allergen {
    background: #fee2e2;
    color: #ef4444;
    font-weight: 600;
}

.product-info-sections-vertical {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.product-info-row {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.info-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-sub);
    white-space: nowrap;
    padding-top: 2px;
    min-width: 60px;
}

.card-footer {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    padding-top: 0;
    border-top: none;
    margin-top: 0;
}

.official-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--brand-green);
    text-decoration: none;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 4px;
    background: var(--accent-color);
    transition: all 0.2s;
}

.official-link:hover {
    background: var(--brand-green);
    color: #fff;
}

.official-link svg {
    width: 10px;
    height: 10px;
}

.jan-code {
    font-size: 0.65rem;
    color: #aaa;
}

/* Footer */
.main-footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-sub);
    font-size: 0.85rem;
}

@media (max-width: 800px) {
    .result-card {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .product-info-sections {
        flex-direction: column;
        gap: 8px;
    }

    .card-footer {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        border-top: 1px dashed var(--border-color);
        padding-top: 10px;
    }
}

@media (max-width: 600px) {
    .usage-steps {
        grid-template-columns: 1fr;
    }

    .result-grid {
        grid-template-columns: 1fr;
    }
}