/* ==========================================================================
   Minimalist Brand Design System (Toushibu Brand Colors)
   ========================================================================== */

:root {
    /* Brand Colors based on https://toushibu-official.com/ */
    --bg-app: #F7F5EF;         /* Brand Warm Sand Background (bg-sand) */
    --bg-card: #ffffff;        /* White Cards */
    --primary: #235AA4;        /* Brand Primary Navy Blue (color-main) */
    --primary-light: #3b77c4;  /* Lighter Navy */
    --accent: #61880A;         /* Brand Sub Green (color-sub) */
    --accent-light: #E8F3D8;   /* Brand Light Green (bg-green-light) */
    --border: #E3E1DA;         /* Brand Muted Sand Border */
    --text-main: #323232;      /* Brand Body Text Black */
    --text-muted: #707070;     /* Brand Muted Text */
    
    --font-sans: 'Noto Sans JP', sans-serif;
    --shadow: 0 4px 6px -1px rgba(112, 112, 112, 0.08), 0 2px 4px -1px rgba(112, 112, 112, 0.05);
    --shadow-hover: 0 10px 15px -3px rgba(35, 90, 164, 0.06), 0 4px 6px -2px rgba(35, 90, 164, 0.03);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-app);
    color: var(--text-main);
    line-height: 1.65;
    padding: 80px 20px;
    -webkit-font-smoothing: antialiased;
}

.portal-back-button {
    position: fixed;
    top: 22px;
    left: 22px;
    z-index: 20;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 40px;
    padding: 9px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 999px;
    box-shadow: var(--shadow);
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.portal-back-button:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-hover);
    transform: translateY(-1px);
}

.portal-back-button:focus-visible {
    outline: 3px solid rgba(35, 90, 164, 0.22);
    outline-offset: 3px;
}

/* Container */
.faq-container {
    max-width: 820px;
    margin: 0 auto;
}

/* Header */
.faq-header {
    text-align: center;
    margin-bottom: 50px;
}

.faq-title {
    font-size: 2.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 14px;
    letter-spacing: 0.02em;
}

/* Search */
.faq-search {
    margin: -18px 0 28px;
}

.faq-search-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
}

.faq-search-box {
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow);
    color: var(--primary);
    display: flex;
    gap: 12px;
    padding: 0 18px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-search-box:focus-within {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-hover);
}

.faq-search-input {
    appearance: none;
    background: transparent;
    border: 0;
    color: var(--text-main);
    flex: 1;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    min-width: 0;
    outline: 0;
    padding: 16px 0;
}

.faq-search-input::placeholder {
    color: #A7A199;
}

.faq-search-status {
    color: var(--text-muted);
    font-size: 0.84rem;
    font-weight: 700;
    min-height: 1.4em;
    padding: 8px 2px 0;
}

/* FAQ Accordion List */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-empty {
    background: #FCFBF9;
    border: 1px dashed var(--border);
    border-radius: 14px;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 700;
    padding: 22px;
    text-align: center;
}

.faq-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.faq-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-hover);
    transform: translateY(-1px);
}

.faq-summary {
    display: flex;
    align-items: center;
    padding: 22px 28px;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.faq-summary::-webkit-details-marker {
    display: none;
}

.faq-q-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    font-size: 1.05rem;
    font-weight: 700;
    margin-right: 18px;
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(35, 90, 164, 0.15);
}

.faq-question-text {
    flex-grow: 1;
    font-weight: 700;
    color: var(--primary);
    font-size: 1.05rem;
    line-height: 1.5;
    padding-right: 16px;
    white-space: pre-line;
}

.faq-toggle-icon {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: transform 0.3s, color 0.2s;
}

.faq-item:hover .faq-toggle-icon {
    color: var(--primary);
}

/* Answer content box */
.faq-answer-wrapper {
    background-color: #FCFBF9; /* Very soft warm tint */
    border-top: 1px solid var(--border);
    padding: 26px 28px;
}

.faq-answer-content {
    display: flex;
    align-items: flex-start;
}

.faq-a-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: var(--accent-light);
    color: var(--accent);
    border-radius: 50%;
    font-size: 1.05rem;
    font-weight: 700;
    margin-right: 18px;
    flex-shrink: 0;
}

.faq-answer-text {
    flex-grow: 1;
    color: var(--text-main);
    font-size: 0.98rem;
    line-height: 1.8;
    white-space: pre-line;
}

.faq-answer-text p {
    margin-bottom: 12px;
}

.faq-answer-text p:last-child {
    margin-bottom: 0;
}

.faq-answer-text ul,
.faq-answer-text ol {
    margin: 0 0 12px 1.4em;
    padding: 0;
}

.faq-answer-text li {
    margin-bottom: 6px;
}

.faq-answer-text strong,
.faq-answer-text b {
    font-weight: 700;
}

.faq-answer-text mark {
    background: #fef3c7;
    color: var(--text-main);
    border-radius: 4px;
    padding: 0 4px;
}

.faq-answer-text hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 18px 0;
}

.faq-answer-text .text-red {
    color: #dc2626;
    font-weight: 700;
}

.faq-answer-text .text-blue {
    color: #2563eb;
    font-weight: 700;
}

.faq-answer-text .text-green {
    color: #059669;
    font-weight: 700;
}

.faq-answer-text .text-orange {
    color: #ea580c;
    font-weight: 700;
}

.faq-answer-text .text-gray {
    color: var(--text-muted);
}

.faq-answer-text .note,
.faq-answer-text .warning {
    border-radius: 12px;
    padding: 12px 14px;
    font-weight: 700;
}

.faq-answer-text .note {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1d4ed8;
}

.faq-answer-text .warning {
    background: #fff7ed;
    border: 1px solid #fed7aa;
    color: #c2410c;
}

.faq-answer-text a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    word-break: break-all;
    transition: color 0.2s;
}

.faq-answer-text a:hover {
    color: var(--primary-light);
}

/* Pagination */
.faq-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-top: 28px;
}

.faq-pagination[hidden] {
    display: none;
}

.faq-pagination-button {
    min-width: 92px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-card);
    color: var(--primary);
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.92rem;
    font-weight: 700;
    padding: 10px 18px;
    box-shadow: var(--shadow);
    transition: border-color 0.2s, box-shadow 0.2s, color 0.2s, transform 0.2s;
}

.faq-pagination-button:hover:not(:disabled) {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-hover);
    color: var(--primary-light);
    transform: translateY(-1px);
}

.faq-pagination-button:disabled {
    background: #F3F1EA;
    color: #A7A199;
    cursor: not-allowed;
    box-shadow: none;
}

.faq-pagination-status {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 700;
    min-width: 110px;
    text-align: center;
}

/* Accordion Open State Styles */
.faq-item[open] {
    border-color: var(--primary);
    box-shadow: var(--shadow-hover);
}

.faq-item[open] .faq-toggle-icon {
    transform: rotate(180deg);
    color: var(--primary);
}

@keyframes slideFadeIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.faq-item[open] .faq-answer-wrapper {
    animation: slideFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Footer */
.faq-footer {
    text-align: center;
    margin-top: 60px;
}

.copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Responsive adjustment */
@media (max-width: 576px) {
    body {
        padding: 50px 15px;
    }

    .portal-back-button {
        top: 12px;
        left: 12px;
        min-height: 36px;
        padding: 8px 12px;
        font-size: 0.84rem;
    }
    
    .faq-title {
        font-size: 1.6rem;
    }

    .faq-search {
        margin: -22px 0 24px;
    }

    .faq-search-input {
        font-size: 0.95rem;
        padding: 14px 0;
    }
    
    .faq-summary {
        padding: 18px 20px;
    }
    
    .faq-q-badge, .faq-a-badge {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
        margin-right: 14px;
    }
    
    .faq-question-text {
        font-size: 0.96rem;
    }
    
    .faq-answer-wrapper {
        padding: 20px;
    }
    
    .faq-answer-text {
        font-size: 0.92rem;
    }

    .faq-pagination {
        gap: 8px;
        margin-top: 22px;
    }

    .faq-pagination-button {
        min-width: 78px;
        padding: 9px 12px;
    }

    .faq-pagination-status {
        min-width: 92px;
        font-size: 0.84rem;
    }
}