:root {
    --primary: #B5651D;
    --primary-light: #D4833B;
    --primary-dark: #8B4513;
    --secondary: #1A1F2E;
    --secondary-light: #2A3040;
    --accent: #5F8575;
    --accent-light: #7BA393;
    --text: #1A1F2E;
    --text-light: #5C6270;
    --bg: #FBF8F4;
    --bg-alt: #F0EBE3;
    --surface: #FFFFFF;
    --border: #E0D8CC;
    --radius: 6px;
    --radius-lg: 12px;
    --shadow: 0 2px 12px rgba(26,31,46,0.07);
    --shadow-lg: 0 8px 28px rgba(26,31,46,0.13);
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    --transition: 0.3s ease;
}

/* ===== HERO MECHANICAL ===== */
.section-hero-mechanical {
    position: relative;
    padding: 5.5rem 1.5rem 5rem;
    background: var(--secondary);
    text-align: left;
    overflow: hidden;
}
.section-hero-mechanical .container {
    position: relative;
    z-index: 2;
    max-width: 700px;
}
.hero-mech-badge {
    display: inline-block;
    background: rgba(181,101,29,0.15);
    color: var(--primary-light);
    padding: 0.4rem 1.1rem;
    border-radius: 3px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(181,101,29,0.25);
}
.hero-mech-title {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    color: #FFFFFF;
    line-height: 1.12;
    margin: 0 0 1rem;
}
.hero-mech-title em {
    font-style: italic;
    color: var(--primary-light);
}
.hero-mech-sub {
    color: rgba(255,255,255,0.7);
    font-size: 1.05rem;
    line-height: 1.6;
    margin: 0 0 2rem;
    max-width: 500px;
}
.hero-mech-btn {
    display: inline-block;
    background: var(--primary);
    color: #FFFFFF;
    padding: 0.85rem 2.2rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: var(--transition);
    border: 2px solid var(--primary);
}
.hero-mech-btn:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(181,101,29,0.35);
}
/* gear decoration */
.hero-mech-gear {
    position: absolute;
    right: -60px;
    top: 50%;
    transform: translateY(-50%);
    width: 380px;
    height: 380px;
    border: 12px solid rgba(181,101,29,0.12);
    border-radius: 50%;
    z-index: 1;
}
.hero-mech-gear::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 160px;
    height: 160px;
    border: 8px solid rgba(181,101,29,0.1);
    border-radius: 50%;
}
.hero-mech-gear::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: rgba(181,101,29,0.15);
    border-radius: 50%;
}
.hero-mech-gear-sm {
    position: absolute;
    right: 200px;
    bottom: -30px;
    width: 140px;
    height: 140px;
    border: 8px solid rgba(95,133,117,0.1);
    border-radius: 50%;
    z-index: 1;
}
.hero-mech-line {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark), transparent);
}

/* ===== EDITORIAL SEO LINKS ===== */
.section-editorial-seo a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.section-editorial-seo a:hover {
    color: var(--primary-dark);
}

/* ===== ACCORDION RIVETED ===== */
.section-accordion-riveted {
    padding: 4.5rem 1.5rem;
    background: var(--bg);
}
.section-accordion-riveted h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--secondary);
    text-align: center;
    margin: 0 0 2.5rem;
}
.accordion-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.accordion-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.accordion-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--secondary);
    font-weight: 600;
    text-align: left;
    transition: var(--transition);
}
.accordion-toggle:hover {
    background: var(--bg-alt);
}
.accordion-toggle .rivet-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: #FFFFFF;
    font-size: 1.1rem;
    font-weight: 700;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}
.accordion-item.open .accordion-toggle .rivet-icon {
    transform: rotate(45deg);
}
.accordion-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
.accordion-panel-inner {
    padding: 0 1.5rem 1.3rem;
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
    border-top: 1px dashed var(--border);
    padding-top: 1rem;
}

/* ===== STATS GAUGES ===== */
.section-stats-gauges {
    padding: 4rem 1.5rem;
    background: var(--secondary);
}
.gauges-grid {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 0 auto;
}
.gauge-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}
.gauge-circle {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    border: 4px solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.gauge-circle::before {
    content: '';
    position: absolute;
    inset: 6px;
    border-radius: 50%;
    border: 1px solid rgba(181,101,29,0.3);
}
.gauge-value {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-light);
}
.gauge-label {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
    text-align: center;
    max-width: 120px;
}

/* ===== ARTICLES BLUEPRINT ===== */
.section-articles-blueprint {
    padding: 4.5rem 1.5rem;
    background: var(--bg);
    position: relative;
}
.section-articles-blueprint h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--secondary);
    text-align: center;
    margin: 0 0 2.5rem;
}
.blueprint-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}
.blueprint-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    text-decoration: none;
    color: var(--text);
    transition: var(--transition);
    position: relative;
}
.blueprint-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border-top: 2px solid var(--primary);
    border-left: 2px solid var(--primary);
    z-index: 2;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.blueprint-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 20px;
    height: 20px;
    border-bottom: 2px solid var(--primary);
    border-right: 2px solid var(--primary);
    z-index: 2;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.blueprint-card:hover::before,
.blueprint-card:hover::after {
    opacity: 1;
}
.blueprint-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}
.blueprint-card picture {
    height: 200px;
}
.blueprint-card picture img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}
.blueprint-body {
    padding: 1.3rem 1.4rem;
}
.blueprint-tag {
    display: inline-block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-family: 'Courier New', monospace;
}
.blueprint-body h3 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    color: var(--secondary);
    margin: 0 0 0.5rem;
    line-height: 1.3;
}
.blueprint-body p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.5;
    margin: 0;
}

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

/* ===== CTA MECHANICAL ===== */
.section-cta-mechanical {
    padding: 4rem 1.5rem;
    background: var(--secondary);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-mech-gear {
    position: absolute;
    left: -40px;
    top: 50%;
    transform: translateY(-50%);
    width: 180px;
    height: 180px;
    border: 8px solid rgba(181,101,29,0.1);
    border-radius: 50%;
}
.cta-mech-gear::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    border: 4px solid rgba(181,101,29,0.08);
    border-radius: 50%;
}
.cta-mech-content {
    position: relative;
    z-index: 2;
    max-width: 550px;
    margin: 0 auto;
}
.cta-mech-content h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    color: #FFFFFF;
    margin: 0 0 0.8rem;
}
.cta-mech-content p {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    margin: 0 0 1.8rem;
    line-height: 1.6;
}
.cta-mech-btn {
    display: inline-block;
    background: var(--primary);
    color: #FFFFFF;
    padding: 0.85rem 2.4rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 2px solid var(--primary);
    transition: var(--transition);
}
.cta-mech-btn:hover {
    background: transparent;
    color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(181,101,29,0.3);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .section-hero-mechanical {
        padding: 4rem 1rem 3.5rem;
        text-align: center;
    }
    .hero-mech-sub {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-mech-gear {
        opacity: 0.4;
        right: -120px;
    }
    .gauges-grid {
        gap: 2rem;
    }
    .gauge-circle {
        width: 90px;
        height: 90px;
    }
    .gauge-value {
        font-size: 1.3rem;
    }
}