/* =========================================================
   FAQ Page Styles - AdQuecto Ultimate Website v5.0
   よくある質問ページ専用スタイル
   ========================================================= */

/* ----------------------------------------
   Page Hero - FAQ
   ---------------------------------------- */
.faq-hero {
    position: relative;
    min-height: 40vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 1.25rem 4rem;
    background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
    overflow: hidden;
}

.faq-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.08) 1px, transparent 0);
    background-size: 40px 40px;
    pointer-events: none;
}

.faq-hero-content {
    position: relative;
    z-index: 1;
    max-width: var(--content-width);
    margin: 0 auto;
    width: 100%;
    text-align: center;
}

.faq-hero-title {
    font-size: clamp(1.75rem, 6vw, 3rem);
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.faq-hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
}

/* ----------------------------------------
   FAQ Categories Section
   ---------------------------------------- */
.faq-categories {
    padding: var(--section-padding-mobile);
    background: var(--color-bg-white);
    position: sticky;
    top: 64px;
    z-index: 50;
    border-bottom: 1px solid var(--color-border);
}

.categories-container {
    max-width: var(--content-width);
    margin: 0 auto;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.categories-container::-webkit-scrollbar {
    display: none;
}

.categories-list {
    display: flex;
    gap: 0.5rem;
    padding: 0.25rem;
    min-width: max-content;
}

.category-btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.category-btn:hover {
    background: var(--color-bg-light-blue);
    color: var(--color-primary);
}

.category-btn.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ----------------------------------------
   FAQ Main Section
   ---------------------------------------- */
.faq-main {
    padding: var(--section-padding-mobile);
    background: var(--color-bg-secondary);
}

.faq-container {
    max-width: var(--content-width-narrow);
    margin: 0 auto;
}

.faq-section {
    margin-bottom: 3rem;
    scroll-margin-top: 140px;
}

.faq-section:last-child {
    margin-bottom: 0;
}

.faq-section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary-deep);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-accent-gold);
}

.faq-section-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary-deep), var(--color-primary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.faq-section-icon svg {
    width: 18px;
    height: 18px;
    color: #fff;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* FAQ Accordion Item */
.faq-item {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition-fast);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    padding: 1.25rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-q-badge {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-gold-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-en);
    font-size: 0.875rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.faq-question-text {
    flex: 1;
}

.faq-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--transition-normal);
}

.faq-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-light);
}

.faq-item.open .faq-toggle {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 1.5rem 1.5rem;
    padding-left: calc(1.5rem + 28px + 1rem);
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-answer-text {
    font-size: 0.9375rem;
    line-height: 1.9;
    color: var(--color-text-secondary);
}

.faq-answer-text p {
    margin-bottom: 1rem;
}

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

.faq-answer-text ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.faq-answer-text li {
    margin-bottom: 0.5rem;
}

.faq-answer-text a {
    color: var(--color-primary);
    text-decoration: underline;
}

/* ----------------------------------------
   Contact CTA Section
   ---------------------------------------- */
.faq-cta {
    padding: var(--section-padding-mobile);
    background: var(--color-bg-white);
}

.faq-cta-container {
    max-width: var(--content-width-narrow);
    margin: 0 auto;
    text-align: center;
}

.faq-cta-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary-deep);
    margin-bottom: 1rem;
}

.faq-cta-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* ----------------------------------------
   Tablet Styles (768px+)
   ---------------------------------------- */
@media (min-width: 768px) {
    .faq-hero {
        min-height: 35vh;
        padding: 10rem 2rem 5rem;
    }
    
    .faq-categories {
        padding: 1rem 2rem;
    }
    
    .categories-list {
        justify-content: center;
    }
    
    .faq-main {
        padding: var(--section-padding-tablet);
    }
    
    .faq-question {
        padding: 1.5rem;
    }
    
    .faq-answer {
        padding: 0 1.5rem 1.5rem;
        padding-left: calc(1.5rem + 28px + 1rem);
    }
    
    .faq-cta {
        padding: var(--section-padding-tablet);
    }
}

/* ----------------------------------------
   Desktop Styles (1024px+)
   ---------------------------------------- */
@media (min-width: 1024px) {
    .faq-hero {
        min-height: 40vh;
        padding: 12rem 2rem 6rem;
    }
    
    .faq-categories {
        padding: 1.25rem 2rem;
    }
    
    .faq-main {
        padding: var(--section-padding-desktop);
    }
    
    .faq-section {
        margin-bottom: 4rem;
    }
    
    .faq-cta {
        padding: var(--section-padding-desktop);
    }
}

/* ----------------------------------------
   Animations
   ---------------------------------------- */
.faq-hero-title,
.faq-hero-subtitle {
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out) forwards;
}

.faq-hero-subtitle {
    animation-delay: 0.2s;
}

.faq-item {
    opacity: 0;
    transform: translateY(20px);
}

.faq-item.animate-in {
    animation: fadeInUp 0.6s var(--ease-out) forwards;
}

/* Answer Slide Animation */
.faq-answer {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height var(--transition-normal), opacity var(--transition-normal);
}

.faq-item.open .faq-answer {
    max-height: 1000px;
    opacity: 1;
}