/* ============================================
   novo-knowledge-pages.css — Knowledge section page styles
   (safety, manufacturers, guides, glossary, calculators)
   ============================================ */


/* ----------------------------------------
   Page: knowledge-safety
   ---------------------------------------- */
/* ========================================
           5. SECTIONS
           ======================================== */

        /* ========================================
           6. WARNING BOX
           ======================================== */
        .warning-box {
            background: linear-gradient(135deg, #E74C3C 0%, #B91C1C 100%);
            color: var(--white);
            padding: 2rem;
            margin-bottom: 3rem;
            display: flex;
            gap: 1.5rem;
            align-items: flex-start;
            border-radius: var(--radius);
            box-shadow: var(--shadow-soft);
        }

        .warning-box .icon {
            width: 56px;
            height: 56px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .warning-box h3 {
            font-family: var(--font-heading);
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .warning-box p {
            font-size: 1rem;
            opacity: 0.9;
            line-height: 1.6;
        }

        /* ========================================
           7. PPE GRID
           ======================================== */
        .ppe-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        @media (max-width: 1024px) {
            .ppe-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 480px) {
            .ppe-grid { grid-template-columns: 1fr; }
        }

        .ppe-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid var(--medium-gray);
            position: relative;
        }

        .ppe-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .ppe-card.required {
            border-color: #E74C3C;
            border-width: 2px;
        }

        .ppe-card.required::before {
            content: "ОБОВ'ЯЗКОВО";
            position: absolute;
            top: -10px;
            left: 50%;
            transform: translateX(-50%);
            background: #E74C3C;
            color: white;
            font-size: 0.625rem;
            font-weight: 700;
            padding: 0.25rem 0.75rem;
            border-radius: 100px;
            letter-spacing: 0.05em;
        }

        .ppe-card .icon {
            width: 64px;
            height: 64px;
            background: var(--light-gray);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 2rem;
        }

        .ppe-card h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            margin-bottom: 0.5rem;
            color: var(--primary-dark);
        }

        .ppe-card p {
            font-size: 0.875rem;
            color: var(--text-gray);
            line-height: 1.5;
        }

        /* ========================================
           8. RULES GRID
           ======================================== */
        .rules-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        @media (max-width: 768px) {
            .rules-grid { grid-template-columns: 1fr; }
        }

        .rule-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid var(--medium-gray);
        }

        .rule-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .rule-card .number {
            font-family: var(--font-heading);
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent-orange);
            line-height: 1;
            margin-bottom: 0.75rem;
        }

        .rule-card h3 {
            font-family: var(--font-heading);
            font-size: 1.125rem;
            margin-bottom: 0.75rem;
            color: var(--primary-dark);
        }

        .rule-card p {
            color: var(--text-gray);
            font-size: 0.9375rem;
            line-height: 1.6;
        }

        /* ========================================
           9. STANDARDS GRID
           ======================================== */
        .standards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        @media (max-width: 768px) {
            .standards-grid { grid-template-columns: 1fr; }
        }

        .standard-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 2rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid var(--medium-gray);
        }

        .standard-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .standard-card h4 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            color: var(--accent-orange);
            background: var(--primary-blue);
            padding: 0.75rem 1rem;
            margin: -2rem -2rem 1.5rem;
            border-radius: var(--radius) var(--radius) 0 0;
        }

        .standard-card p {
            font-size: 0.9375rem;
            color: var(--text-gray);
            line-height: 1.6;
        }

        /* ========================================
           10. FAQ SECTION
           ======================================== */
        .faq-section {
            padding: 80px 0;
            background: var(--light-gray);
        }

        .faq-list {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border-radius: var(--radius);
            margin-bottom: 1rem;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--medium-gray);
            overflow: hidden;
        }

        .faq-item summary {
            padding: 1.5rem 2rem;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            list-style: none;
            min-height: 48px;
            color: var(--primary-dark);
            font-family: var(--font-heading);
            transition: var(--transition);
        }

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

        .faq-item summary::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 400;
            color: var(--accent-orange);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item summary:hover {
            background: var(--light-gray);
        }

        .faq-item[open] summary {
            border-bottom: 1px solid var(--medium-gray);
        }

        .faq-answer {
            padding: 1.5rem 2rem;
            color: var(--text-gray);
            line-height: 1.7;
            font-size: 0.9375rem;
        }

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

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

        /* ========================================
           11. DOWNLOAD BOX
           ======================================== */
        .download-box {
            background: var(--white);
            border-radius: var(--radius);
            padding: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--medium-gray);
        }

        .download-box h3 {
            font-family: var(--font-heading);
            font-size: 1.25rem;
            margin-bottom: 0.25rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--primary-dark);
        }

        .download-box p {
            color: var(--text-gray);
            font-size: 0.9375rem;
        }


/* ----------------------------------------
   Page: knowledge-manufacturers
   ---------------------------------------- */
.manufacturers-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin: 2rem 0;
        }

        @media (max-width: 1024px) {
            .manufacturers-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .manufacturers-grid {
                grid-template-columns: 1fr;
            }
        }

        .manufacturer-card {
            background: var(--white);
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--medium-gray);
            transition: var(--transition);
            text-align: center;
        }

        .manufacturer-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .manufacturer-logo {
            width: 100%;
            aspect-ratio: 3/2;
            background: #F8F9FA;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            padding: 1rem;
            overflow: hidden;
        }

        .manufacturer-logo img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
        }

        .manufacturer-name {
            font-family: var(--font-heading);
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 0.25rem;
        }

        .manufacturer-country {
            font-size: 0.8125rem;
            color: var(--accent-orange);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.5rem;
        }

        .manufacturer-desc {
            font-size: 0.8125rem;
            color: var(--text-gray);
            line-height: 1.5;
        }

/* ========================================
           5. SECTIONS
           ======================================== */

        /* ========================================
           6. CONTENT GRID
           ======================================== */
        .content-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 3rem;
            align-items: start;
        }

        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }

        .content-main h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            font-family: var(--font-heading);
            color: var(--primary-dark);
        }

        .content-main h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 2rem 0 1rem;
            font-family: var(--font-heading);
            color: var(--primary-blue);
        }

        .content-main p {
            color: var(--text-gray);
            margin-bottom: 1rem;
            line-height: 1.8;
        }

        .content-main ul {
            margin: 1rem 0 1.5rem 1.5rem;
            color: var(--text-gray);
        }

        .content-main ul li {
            margin-bottom: 0.5rem;
            line-height: 1.7;
        }

        /* Sidebar */
        .sidebar-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--medium-gray);
            margin-bottom: 1.5rem;
        }

        .sidebar-card h4 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 1rem;
            font-family: var(--font-heading);
            color: var(--primary-dark);
        }

        .sidebar-card ul {
            list-style: none;
        }

        .sidebar-card ul li {
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--medium-gray);
        }

        .sidebar-card ul li:last-child {
            border-bottom: none;
        }

        .sidebar-card ul li a {
            color: var(--text-gray);
            text-decoration: none;
            font-size: 0.9375rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            min-height: 44px;
        }

        .sidebar-card ul li a:hover {
            color: var(--primary-blue);
        }

        /* ========================================
           7. FAQ SECTION
           ======================================== */
        .faq-section {
            padding: 80px 0;
            background: var(--color-primary-navy);
            color: white;
        }

        .faq-section .section-badge {
            background: rgba(245,166,35,0.15);
            color: var(--color-accent-gold);
        }

        .faq-grid {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--medium-gray);
            border-radius: var(--radius);
            margin-bottom: 1rem;
            background: var(--white);
            transition: var(--transition);
        }

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

        .faq-item[open] {
            box-shadow: var(--shadow-soft);
        }

        .faq-item summary {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1.0625rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            min-height: 48px;
            font-family: var(--font-heading);
            color: var(--primary-dark);
            transition: var(--transition);
        }

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

        .faq-item summary::after {
            content: '';
            width: 24px;
            height: 24px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%231E3A5F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item summary:hover {
            color: var(--primary-blue);
        }

        .faq-item .faq-answer {
            padding: 0 1.5rem 1.5rem;
            color: var(--text-gray);
            line-height: 1.8;
        }

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

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

        .faq-item .faq-answer ul {
            margin: 0.5rem 0 0.5rem 1.5rem;
        }

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


/* ----------------------------------------
   Page: knowledge-guides
   ---------------------------------------- */
/* ========================================
           6. SECTIONS
           ======================================== */

        /* ========================================
           7. FEATURED GUIDE
           ======================================== */
        .featured-guide {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 0;
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 3rem;
            box-shadow: var(--shadow-soft);
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        .featured-guide:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        @media (max-width: 1024px) {
            .featured-guide { grid-template-columns: 1fr; }
        }

        .featured-guide-img {
            background: var(--primary-blue);
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            position: relative;
        }

        .featured-guide-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            top: 0;
            left: 0;
        }

        .featured-guide-content {
            padding: 2.5rem;
            background: var(--white);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-guide-content .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1rem;
            background: rgba(30, 58, 95, 0.1);
            color: var(--primary-blue);
            font-weight: 600;
            font-size: 0.75rem;
            margin-bottom: 1rem;
            width: fit-content;
            border-radius: 100px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .featured-guide-content h3 {
            font-family: var(--font-heading);
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
            color: var(--primary-dark);
        }

        .featured-guide-content p {
            color: var(--text-gray);
            margin-bottom: 1.5rem;
            font-size: 1rem;
            line-height: 1.7;
        }

        .categories-nav {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin-bottom: 2rem;
        }

        .cat-btn {
            padding: 0.75rem 1.5rem;
            border: 2px solid var(--medium-gray);
            background: var(--white);
            font-weight: 500;
            font-size: 0.875rem;
            cursor: pointer;
            transition: var(--transition);
            border-radius: var(--radius);
            min-height: 48px;
            font-family: var(--font-body);
        }

        .cat-btn:hover {
            border-color: var(--primary-blue);
            color: var(--primary-blue);
        }

        .cat-btn.active {
            background: var(--primary-blue);
            border-color: var(--primary-blue);
            color: var(--white);
        }

        /* ========================================
           9. GUIDE CARDS
           ======================================== */
        .guides-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        @media (max-width: 1024px) {
            .guides-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 640px) {
            .guides-grid { grid-template-columns: 1fr; }
        }

        .guide-card {
            border-radius: var(--radius);
            background: var(--white);
            transition: var(--transition);
            text-decoration: none;
            color: inherit;
            display: block;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--medium-gray);
            overflow: hidden;
        }

        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .guide-card-img {
            height: 160px;
            background: var(--primary-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .guide-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .guide-card-badge {
            position: absolute;
            top: 1rem;
            left: 1rem;
            padding: 0.375rem 0.75rem;
            font-size: 0.6875rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            border-radius: 100px;
        }

        .guide-card-badge.beginner {
            background: #10B981;
            color: white;
        }

        .guide-card-badge.intermediate {
            background: var(--primary-blue);
            color: white;
        }

        .guide-card-badge.advanced {
            background: #EF4444;
            color: white;
        }

        .guide-card-badge.video {
            background: var(--accent-orange);
            color: var(--primary-dark);
        }

        .guide-card-body {
            padding: 1.5rem;
        }

        .guide-card h3 {
            font-family: var(--font-heading);
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary-dark);
            letter-spacing: -0.01em;
        }

        .guide-card p {
            font-size: 0.9375rem;
            color: var(--text-gray);
            margin-bottom: 1rem;
            line-height: 1.5;
        }

        .guide-card-meta {
            display: flex;
            gap: 1rem;
            font-size: 0.75rem;
            color: var(--light-text);
        }

        .guide-card-meta span {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        /* ========================================
           10. FAQ SECTION
           ======================================== */
        .faq-section {
            background: var(--color-primary-navy);
            color: white;
            padding: 80px 0;
        }

        .faq-section .section-badge {
            background: rgba(245,166,35,0.15);
            color: var(--color-accent-gold);
        }

        .faq-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .faq-header h2 {
            font-size: 2.5rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            font-family: var(--font-heading);
            color: white;
            margin-bottom: 0.5rem;
        }

        .faq-header p {
            color: rgba(255,255,255,0.6);
            font-size: 1.125rem;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border-radius: var(--radius);
            margin-bottom: 1rem;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--medium-gray);
            overflow: hidden;
        }

        .faq-item summary {
            padding: 1.5rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            min-height: 48px;
            font-family: var(--font-heading);
            letter-spacing: -0.01em;
            transition: var(--transition);
        }

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

        .faq-item summary::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary-blue);
            font-weight: 400;
            transition: var(--transition);
            flex-shrink: 0;
            margin-left: 1rem;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item summary:hover {
            color: var(--primary-blue);
        }

        .faq-item[open] summary {
            border-bottom: 1px solid var(--medium-gray);
        }

        .faq-answer {
            padding: 1.5rem;
            color: var(--text-gray);
            line-height: 1.7;
            font-size: 0.9375rem;
        }

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

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

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

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


/* ----------------------------------------
   Page: knowledge-glossary
   ---------------------------------------- */
/* ========================================
           5. SECTIONS
           ======================================== */

        /* ========================================
           6. SEARCH & ALPHABET
           ======================================== */
        .search-box {
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .search-input {
            width: 100%;
            padding: 1rem 1.5rem;
            border: 2px solid var(--medium-gray);
            border-radius: var(--radius);
            font-family: var(--font-body);
            font-size: 1rem;
            transition: var(--transition);
            min-height: 48px;
        }

        .search-input:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
        }

        .alphabet {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            justify-content: center;
            margin-bottom: 3rem;
        }

        .alphabet a {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid var(--medium-gray);
            border-radius: var(--radius-sm);
            font-weight: 600;
            text-decoration: none;
            color: var(--primary-dark);
            transition: var(--transition);
            min-height: 48px;
            min-width: 48px;
        }

        .alphabet a:hover,
        .alphabet a.active {
            background: var(--primary-blue);
            border-color: var(--primary-blue);
            color: var(--white);
        }

        /* ========================================
           7. GLOSSARY TERMS
           ======================================== */
        .terms-section {
            margin-bottom: 3rem;
        }

        .terms-section h3 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            background: var(--primary-blue);
            color: var(--white);
            padding: 0.75rem 1.25rem;
            display: inline-block;
            margin-bottom: 1rem;
            border-radius: var(--radius-sm);
        }

        .term-item {
            border: 1px solid var(--medium-gray);
            margin-bottom: 0.75rem;
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }

        .term-item:hover {
            box-shadow: var(--shadow-card);
        }

        .term-header {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            min-height: 48px;
            transition: var(--transition);
        }

        .term-header:hover {
            background: var(--light-gray);
        }

        .term-header::after {
            content: '+';
            font-size: 1.25rem;
            color: var(--primary-blue);
            font-weight: 700;
        }

        .term-item.open .term-header::after {
            content: '-';
        }

        .term-body {
            padding: 0 1.5rem 1.25rem;
            display: none;
            border-top: 1px solid var(--medium-gray);
        }

        .term-item.open .term-body {
            display: block;
            padding-top: 1.25rem;
        }

        .term-body p {
            color: var(--text-gray);
            line-height: 1.7;
        }

        .term-body .example {
            background: var(--light-gray);
            padding: 1rem;
            margin-top: 1rem;
            font-size: 0.9375rem;
            border-radius: var(--radius-sm);
            border-left: 4px solid var(--accent-orange);
        }

        .term-body .example strong {
            color: var(--primary-dark);
        }

        .term-xref {
            margin-top: 0.75rem;
            padding-top: 0.75rem;
            border-top: 1px dashed var(--medium-gray);
            font-size: 0.875rem;
            color: var(--text-gray);
        }

        .term-xref a {
            color: var(--primary-blue);
            text-decoration: none;
            font-weight: 500;
        }

        .term-xref a:hover {
            text-decoration: underline;
        }

        /* ========================================
           8. FAQ SECTION
           ======================================== */
        .faq-section {
            background: var(--color-primary-navy);
            color: white;
            padding: 80px 0;
        }

        .faq-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .faq-header h2 {
            font-size: 2.5rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            font-family: var(--font-heading);
            color: white;
            margin-bottom: 0.5rem;
        }

        .faq-header p {
            color: rgba(255,255,255,0.6);
            font-size: 1.125rem;
        }

        .faq-grid {
            display: grid;
            gap: 1rem;
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--medium-gray);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-item details {
            width: 100%;
        }

        .faq-item summary {
            padding: 1.25rem 1.5rem;
            padding-right: 3rem;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            position: relative;
            min-height: 48px;
            display: flex;
            align-items: center;
            transition: var(--transition);
            font-size: 1rem;
            color: var(--primary-dark);
        }

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

        .faq-item summary::after {
            content: '+';
            position: absolute;
            right: 1.5rem;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.5rem;
            color: var(--primary-blue);
            font-weight: 700;
            transition: var(--transition);
        }

        .faq-item details[open] summary::after {
            content: '-';
        }

        .faq-item summary:hover {
            background: var(--light-gray);
        }

        .faq-answer {
            padding: 0 1.5rem 1.5rem;
            color: var(--text-gray);
            line-height: 1.7;
            border-top: 1px solid var(--medium-gray);
            padding-top: 1.25rem;
        }

        .faq-answer strong {
            color: var(--primary-dark);
        }


/* ----------------------------------------
   Page: knowledge-calculators
   ---------------------------------------- */
/* ========================================
           6. SECTIONS
           ======================================== */

        /* ========================================
           7. CALCULATOR CARDS
           ======================================== */
        .calc-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        @media (max-width: 1024px) {
            .calc-grid { grid-template-columns: 1fr; }
        }

        .calc-card {
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--medium-gray);
            overflow: hidden;
            transition: var(--transition);
        }

        .calc-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .calc-card-header {
            background: var(--primary-blue);
            color: var(--white);
            padding: 1.5rem;
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .calc-card-header .icon {
            width: 48px;
            height: 48px;
            background: var(--accent-orange);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--primary-dark);
        }

        .calc-card-header h3 {
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.25rem;
        }

        .calc-card-header p {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.7);
        }

        .calc-card-body {
            padding: 1.5rem;
        }

        .form-group {
            margin-bottom: 1.25rem;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.5rem;
            font-size: 0.875rem;
            color: var(--primary-dark);
        }

        .form-group input,
        .form-group select {
            width: 100%;
            padding: 0.875rem 1rem;
            border: 2px solid var(--medium-gray);
            border-radius: var(--radius-sm);
            font-family: var(--font-body);
            font-size: 1rem;
            transition: var(--transition);
            min-height: 48px;
        }

        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary-blue);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }

        @media (max-width: 480px) {
            .form-row { grid-template-columns: 1fr; }
        }

        .result-box {
            background: var(--light-gray);
            padding: 1.5rem;
            text-align: center;
            margin-top: 1rem;
            border-radius: var(--radius-sm);
            border: 2px solid var(--medium-gray);
        }

        .result-box .label {
            font-size: 0.875rem;
            color: var(--text-gray);
            margin-bottom: 0.5rem;
        }

        .result-box .value {
            font-family: var(--font-heading);
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-blue);
            line-height: 1;
        }

        .result-box .unit {
            font-size: 0.875rem;
            color: var(--text-gray);
            margin-top: 0.25rem;
        }

        /* ========================================
           8. FAQ SECTION
           ======================================== */
        .faq-section {
            padding: 80px 0;
            background: var(--color-primary-navy);
            color: white;
        }

        .faq-section .section-badge {
            background: rgba(245,166,35,0.15);
            color: var(--color-accent-gold);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border-radius: var(--radius);
            margin-bottom: 1rem;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--medium-gray);
            overflow: hidden;
        }

        .faq-item summary {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            list-style: none;
            min-height: 48px;
            transition: var(--transition);
            color: var(--primary-dark);
        }

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

        .faq-item summary::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 400;
            color: var(--primary-blue);
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item summary:hover {
            background: var(--light-gray);
        }

        .faq-item[open] summary {
            border-bottom: 1px solid var(--medium-gray);
        }

        .faq-answer {
            padding: 1.5rem;
            color: var(--text-gray);
            line-height: 1.7;
        }

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

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

        .faq-answer code {
            background: var(--light-gray);
            padding: 0.125rem 0.375rem;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-blue);
        }