/* index.html — FAQ accordion section */

#faq.index-faq-section {
    position: relative;
    isolation: isolate;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 35%, #f1f5f9 100%);
}

#faq.index-faq-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 12% 15%, rgba(59, 130, 246, 0.09) 0%, transparent 55%),
        radial-gradient(ellipse 55% 45% at 88% 85%, rgba(16, 185, 129, 0.07) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

html.dark #faq.index-faq-section {
    background: linear-gradient(180deg, #0f172a 0%, #111827 40%, #0f172a 100%);
}

html.dark #faq.index-faq-section::before {
    background:
        radial-gradient(ellipse 60% 50% at 12% 15%, rgba(59, 130, 246, 0.14) 0%, transparent 55%),
        radial-gradient(ellipse 55% 45% at 88% 85%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
}

#faq .container {
    position: relative;
    z-index: 1;
}

/* Header */
.index-faq-head {
    max-width: 640px;
    margin: 0 auto 2.25rem;
    text-align: center;
}

.index-faq-eyebrow {
    display: inline-flex;
    align-items: center;
    margin-bottom: 0.875rem;
    padding: 0.35rem 0.9rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #2563eb;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.22);
    border-radius: 999px;
}

html.dark .index-faq-eyebrow {
    color: #93c5fd;
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(96, 165, 250, 0.35);
}

.index-faq-title {
    margin: 0 0 0.75rem;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: #0f172a;
}

html.dark .index-faq-title {
    color: #f8fafc;
}

.index-faq-title-accent {
    background: linear-gradient(135deg, #2563eb 0%, #6366f1 55%, #059669 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

html.dark .index-faq-title-accent {
    background: linear-gradient(135deg, #60a5fa 0%, #818cf8 50%, #34d399 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

.index-faq-lead {
    margin: 0 auto;
    max-width: 480px;
    font-size: 1rem;
    line-height: 1.65;
    color: #64748b;
}

html.dark .index-faq-lead {
    color: #94a3b8;
}

.index-faq-updated {
    display: inline-flex;
    align-items: center;
    margin-top: 1rem;
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #64748b;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid #e2e8f0;
    border-radius: 999px;
}

html.dark .index-faq-updated {
    color: #94a3b8;
    background: rgba(30, 41, 59, 0.65);
    border-color: #334155;
}

/* Accordion list */
.index-faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    max-width: 860px;
    margin: 0 auto;
}

/* Item */
#faq .index-faq-item {
    overflow: hidden;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

#faq .index-faq-item[open] {
    border-color: rgba(59, 130, 246, 0.35);
    box-shadow: 0 8px 28px rgba(37, 99, 235, 0.1);
}

html.dark #faq .index-faq-item {
    background: #1e293b;
    border-color: #334155;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

html.dark #faq .index-faq-item[open] {
    border-color: rgba(96, 165, 250, 0.4);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

/* Summary / trigger */
#faq .index-faq-summary {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1.1rem 1.25rem;
    cursor: pointer;
    list-style: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

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

#faq .index-faq-summary::marker {
    content: '';
}

#faq .index-faq-summary:hover {
    background: rgba(59, 130, 246, 0.04);
}

html.dark #faq .index-faq-summary:hover {
    background: rgba(59, 130, 246, 0.08);
}

#faq .index-faq-item[open] .index-faq-summary {
    background: transparent;
    border-bottom: none;
}

html.dark #faq .index-faq-item[open] .index-faq-summary {
    background: transparent;
}

/* Number badge */
#faq .index-faq-num {
    flex-shrink: 0;
    margin-top: 0.15rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: #fff;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(37, 99, 235, 0.28);
}

#faq .index-faq-item:nth-child(4n + 2) .index-faq-num {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    box-shadow: 0 3px 10px rgba(79, 70, 229, 0.28);
}

#faq .index-faq-item:nth-child(4n + 3) .index-faq-num {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    box-shadow: 0 3px 10px rgba(124, 58, 237, 0.28);
}

#faq .index-faq-item:nth-child(4n) .index-faq-num {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 3px 10px rgba(16, 185, 129, 0.28);
}

/* Question text */
#faq .index-faq-question {
    flex: 1;
    min-width: 0;
    margin: 0;
    padding: 0.2rem 0.5rem 0 0;
    font-size: 1.0625rem;
    font-weight: 700;
    line-height: 1.45;
    color: #0f172a;
    text-align: left;
}

html.dark #faq .index-faq-question {
    color: #f1f5f9;
}

/* Chevron */
#faq .index-faq-chevron {
    flex-shrink: 0;
    margin-top: 0.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    color: #64748b;
    background: #f1f5f9;
    border-radius: 8px;
    transition: transform 0.3s ease, background 0.25s ease, color 0.25s ease;
}

#faq .index-faq-chevron svg {
    width: 1.125rem;
    height: 1.125rem;
}

#faq .index-faq-item[open] .index-faq-chevron {
    transform: rotate(180deg);
    color: #2563eb;
    background: rgba(59, 130, 246, 0.12);
}

html.dark #faq .index-faq-chevron {
    color: #94a3b8;
    background: #0f172a;
}

html.dark #faq .index-faq-item[open] .index-faq-chevron {
    color: #93c5fd;
    background: rgba(59, 130, 246, 0.2);
}

/* Panel */
#faq .index-faq-panel {
    border-top: 1px solid #e2e8f0;
    background: #f8fafc;
}

html.dark #faq .index-faq-panel {
    border-top-color: #334155;
    background: rgba(15, 23, 42, 0.45);
}

#faq .index-faq-answer {
    margin: 0;
    padding: 1rem 1.25rem 1.25rem;
    max-width: 72ch;
    font-size: 0.9875rem;
    font-weight: 400;
    line-height: 1.65;
    color: #475569;
}

html.dark #faq .index-faq-answer {
    color: #94a3b8;
}

@media (max-width: 640px) {
    #faq .index-faq-summary {
        padding: 1rem;
        gap: 0.65rem;
    }

    #faq .index-faq-num {
        width: 2rem;
        height: 2rem;
        font-size: 0.6875rem;
    }

    #faq .index-faq-question {
        font-size: 0.9375rem;
        padding-top: 0.15rem;
    }

    #faq .index-faq-answer {
        padding: 0.9rem 1rem 1.1rem;
        font-size: 0.9375rem;
        max-width: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    #faq .index-faq-chevron {
        transition: none;
    }
}