/**
 * Solar & Off-Grid Lighting Guide — unique components
 * Layout constraint, hero badge/subtitle, spec cards,
 * diagrams, success-box, key-point boxes, FAQ accordion,
 * guide footer, TOC overrides, highlight spans.
 *
 * @package Techlumen
 */

/* ============================================
   LAYOUT CONSTRAINT
   ============================================ */
.solar-guide-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
}

/* ============================================
   HERO — full-width bleed + radial glow
   ============================================ */
.solar-guide-wrapper .guide-hero {
    background: var(--guide-gradient);
    color: #ffffff;
    position: relative;
    overflow: hidden;
    margin: 0 -2rem 40px;
    border-radius: 0 0 var(--guide-radius-xl) var(--guide-radius-xl);
    padding: clamp(40px, 8vw, 80px) clamp(25px, 5vw, 50px);
    text-align: left;
}

.solar-guide-wrapper .guide-hero h1 {
    color: #ffffff;
    font-size: clamp(1.6rem, 5vw, 2.2rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.solar-guide-wrapper .guide-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.solar-guide-wrapper .guide-hero .hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.18);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--guide-radius-pill);
    padding: 0.3rem 1rem;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
    color: #ffffff;
}

.solar-guide-wrapper .guide-hero .subtitle {
    font-size: clamp(1rem, 2vw, 1.15rem);
    opacity: 0.92;
    max-width: 700px;
    line-height: 1.6;
    color: #e2e8f0;
}

/* ============================================
   h2 — border-bottom accent
   ============================================ */
.solar-guide-wrapper h2 {
    margin-top: 50px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--guide-border);
}

/* ============================================
   TOC — column layout override
   ============================================ */
.solar-guide-wrapper .toc {
    border: 1px solid var(--guide-border);
    padding: 25px 30px;
    margin-bottom: 40px;
    box-shadow: var(--guide-shadow-sm);
    position: static;
    max-width: none;
}

.solar-guide-wrapper .toc h2 {
    margin: 0 0 15px;
    font-size: 1.1rem;
    border-bottom: none;
    padding-bottom: 0;
}

.solar-guide-wrapper .toc ol {
    margin: 0;
    padding-left: 1.2rem;
    columns: 2;
    column-gap: 30px;
}

.solar-guide-wrapper .toc li {
    margin-bottom: 8px;
    break-inside: avoid;
}

.solar-guide-wrapper .toc a {
    color: var(--guide-text-secondary);
    text-decoration: none;
    transition: var(--guide-transition);
}

.solar-guide-wrapper .toc a:hover {
    color: var(--guide-accent);
}

/* ============================================
   HIGHLIGHT SPANS
   ============================================ */
.solar-guide-wrapper .hl {
    background: var(--guide-accent-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
    color: var(--guide-accent);
}

.solar-guide-wrapper .highlight {
    background: linear-gradient(120deg, rgba(234,88,12,0.15) 0%, rgba(234,88,12,0.05) 100%);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
    color: #c2410c;
}

/* ============================================
   SUCCESS BOX
   ============================================ */
.solar-guide-wrapper .success-box,
.solar-guide-wrapper .info-box.success {
    background: #ECFDF5;
    border-left: 4px solid var(--guide-success);
    padding: 20px 24px;
    border-radius: var(--guide-radius-md);
    margin: 20px 0 25px;
    line-height: 1.7;
}

.solar-guide-wrapper .success-box p,
.solar-guide-wrapper .info-box.success p {
    color: #065F46;
    margin-bottom: 0.5rem;
}

.solar-guide-wrapper .success-box p:last-child,
.solar-guide-wrapper .info-box.success p:last-child {
    margin-bottom: 0;
}

/* ============================================
   INFO-BOX VARIANTS (info, warning, tip)
   ============================================ */
.solar-guide-wrapper .info-box.info {
    background: #eff6ff;
    border-left: 4px solid #3B82F6;
}

.solar-guide-wrapper .info-box.info p,
.solar-guide-wrapper .info-box.info strong {
    color: #1e40af;
}

.solar-guide-wrapper .info-box.warning {
    background: #fffbeb;
    border-left: 4px solid #f59e0b;
}

.solar-guide-wrapper .info-box.warning p,
.solar-guide-wrapper .info-box.warning strong {
    color: #92400e;
}

.solar-guide-wrapper .info-box.tip {
    background: #faf5ff;
    border-left: 4px solid #8b5cf6;
}

.solar-guide-wrapper .info-box.tip p,
.solar-guide-wrapper .info-box.tip strong {
    color: #5b21b6;
}

.solar-guide-wrapper .info-box strong {
    display: block;
    margin-bottom: 0.3rem;
}

/* ============================================
   KEY POINT BOX
   ============================================ */
.solar-guide-wrapper .key-point {
    background: var(--guide-accent-light);
    border: 1px solid rgba(234,88,12,0.15);
    border-radius: var(--guide-radius-md);
    padding: 20px 24px;
    margin: 20px 0 25px;
}

.solar-guide-wrapper .key-point p {
    color: var(--guide-accent-dark);
}

/* ============================================
   SPEC CARDS GRID
   ============================================ */
.solar-guide-wrapper .spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin: 25px 0 30px;
}

.solar-guide-wrapper .spec-card {
    background: var(--guide-bg-card);
    border: 1px solid var(--guide-border);
    border-radius: var(--guide-radius-md);
    padding: 20px;
    text-align: center;
    border-top: 3px solid var(--guide-accent);
    box-shadow: var(--guide-shadow-sm);
    transition: var(--guide-transition);
}

.solar-guide-wrapper .spec-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--guide-shadow-md);
    border-color: var(--guide-accent);
}

.solar-guide-wrapper .spec-card .card-label {
    font-size: 0.82rem;
    color: var(--guide-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.solar-guide-wrapper .spec-card .card-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--guide-accent);
}

.solar-guide-wrapper .spec-card .card-note {
    font-size: 0.85rem;
    color: var(--guide-text-secondary);
    margin-top: 4px;
}

/* ============================================
   DIAGRAM CONTAINER
   ============================================ */
.solar-guide-wrapper .diagram-container {
    background: var(--guide-bg-card);
    border: 1px solid var(--guide-border);
    border-radius: var(--guide-radius-lg);
    padding: 25px;
    margin: 25px 0 30px;
    box-shadow: var(--guide-shadow-sm);
}

.solar-guide-wrapper .diagram-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--guide-accent-dark);
    margin-bottom: 15px;
    text-align: center;
}

.solar-guide-wrapper .diagram-caption {
    font-size: 0.85rem;
    color: var(--guide-text-muted);
    text-align: center;
    margin-top: 12px;
    font-style: italic;
}

/* ============================================
   FAQ ACCORDION
   ============================================ */
.solar-guide-wrapper .faq-item {
    background: var(--guide-bg-card);
    border: 1px solid var(--guide-border);
    border-radius: var(--guide-radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    box-shadow: var(--guide-shadow-sm);
}

.solar-guide-wrapper .faq-question {
    padding: 16px 20px;
    font-weight: 600;
    color: var(--guide-accent-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.solar-guide-wrapper .faq-question::after {
    content: '+';
    font-size: 1.3rem;
    color: var(--guide-accent);
    font-weight: 300;
}

.solar-guide-wrapper .faq-question.active::after {
    content: '\2212';
}

.solar-guide-wrapper .faq-answer {
    padding: 0 20px 16px;
    color: var(--guide-text-secondary);
    font-size: 0.95rem;
    display: none;
    border-top: 1px solid var(--guide-border);
}

.solar-guide-wrapper .faq-answer.active {
    display: block;
}

/* ============================================
   IMAGE PLACEHOLDER — extra classes
   ============================================ */
.solar-guide-wrapper .image-placeholder-label {
    font-weight: 600;
    color: var(--guide-text);
    margin-bottom: 4px;
}

.solar-guide-wrapper .image-placeholder-dimensions {
    font-size: 0.8rem;
    color: var(--guide-text-muted);
    margin-top: 8px;
    font-style: italic;
}

/* ============================================
   GUIDE FOOTER (gradient CTA block)
   ============================================ */
.solar-guide-wrapper .guide-footer {
    background: var(--guide-gradient);
    color: #fff;
    padding: 40px;
    border-radius: var(--guide-radius-xl);
    margin: 50px 0 30px;
    text-align: center;
}

.solar-guide-wrapper .guide-footer strong {
    color: #fff;
}

.solar-guide-wrapper .guide-footer p {
    color: #FFFFFF;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.solar-guide-wrapper .guide-footer a {
    color: var(--guide-accent-light);
    text-decoration: none;
}

.solar-guide-wrapper .guide-footer a:hover {
    text-decoration: underline;
}

/* ============================================
   CHECKLIST ITEMS
   ============================================ */
.solar-guide-wrapper .checklist {
    list-style: none;
    padding-left: 0;
    margin: 1rem 0;
}

.solar-guide-wrapper .checklist li {
    padding-left: 1.6em;
    position: relative;
    margin-bottom: 0.5rem;
}

.solar-guide-wrapper .checklist li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--guide-success);
    font-weight: 700;
}

/* ============================================
   RESPONSIVE — 640px
   ============================================ */
@media (max-width: 640px) {
    .solar-guide-wrapper .toc ol {
        columns: 1;
    }

    .solar-guide-wrapper .spec-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .solar-guide-wrapper .guide-hero {
        padding: 30px 20px;
    }

    .solar-guide-wrapper .guide-footer {
        padding: 25px 20px;
    }
}

/* ============================================
   RESPONSIVE — 480px
   ============================================ */
@media (max-width: 480px) {
    .solar-guide-wrapper .spec-grid {
        grid-template-columns: 1fr;
    }
}