/* --- Clean & Corporate Modern Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

:root {
    --brand-primary: #0f172a; 
    --brand-accent: #2563eb;  
    --brand-success: #10b981;
    --background-light: #f8fafc;
    --text-main: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--text-main);
    background-color: #ffffff;
    line-height: 1.7;
}

.container {
    width: 90%;
    max-width: 1140px;
    margin: 0 auto;
}

/* --- Premium Navbar --- */
.navbar {
    background: #ffffff;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--brand-primary);
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--brand-accent);
}

.logo i {
    margin-right: 6px;
    color: var(--brand-accent);
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 15px;
    margin-left: 30px;
    transition: color 0.2s ease;
}

.nav-menu a:hover, .nav-menu a.active {
    color: var(--brand-accent);
}

.nav-menu .btn-nav {
    background: var(--brand-accent);
    color: #ffffff !important;
    padding: 27px 53px;
    border-radius: 6px;
    font-weight: 600;
}

.nav-menu .btn-nav:hover {
    background: #1d4ed8;
}

/* --- Compliant Hero Section --- */
.hero-section {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    padding: 90px 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.badge {
    background-color: #eff6ff;
    color: var(--brand-accent);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 20px;
}

.hero-text h1 {
    font-size: 40px;
    font-weight: 800;
    color: var(--brand-primary);
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-text .highlight {
    color: var(--brand-accent);
}

.hero-text p {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 35px;
}

/* Secure Search Bar Box */
.search-box {
    display: flex;
    background: #ffffff;
    padding: 5px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
    margin-bottom: 30px;
}

.search-box input {
    flex: 1;
    border: none;
    outline: none;
    padding: 12px 15px;
    font-size: 15px;
    color: var(--brand-primary);
}

.search-box button {
    background: var(--brand-primary);
    color: #ffffff;
    border: none;
    padding: 0 25px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s;
}

.search-box button:hover {
    background: var(--brand-accent);
}

.hero-features span {
    margin-right: 25px;
    font-size: 14px;
    font-weight: 500;
}

.hero-features i {
    color: var(--brand-success);
    margin-right: 6px;
}

/* Neutral Abstract Visual */
.abstract-tech-card {
    background: var(--brand-primary);
    color: #ffffff;
    padding: 50px 40px;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.1);
    text-align: center;
}

.abstract-tech-card i {
    font-size: 55px;
    color: var(--brand-accent);
    margin-bottom: 25px;
}

.abstract-tech-card h3 {
    font-size: 22px;
    margin-bottom: 10px;
}

.abstract-tech-card p {
    color: #94a3b8;
    font-size: 14px;
}

/* --- Strict Policy Banner --- */
.policy-banner {
    background-color: #fef2f2;
    border-top: 1px solid #fee2e2;
    border-bottom: 1px solid #fee2e2;
    padding: 15px 0;
}

.banner-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.banner-content i {
    color: #ef4444;
    font-size: 18px;
}

.banner-content p {
    font-size: 13px;
    color: #991b1b;
}

/* --- Section Global Layouts --- */
.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--brand-primary);
    margin-bottom: 12px;
}

.section-title p {
    color: var(--text-muted);
    font-size: 16px;
}

/* --- Process Section --- */
.process-section {
    padding: 90px 0;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.process-card {
    background: var(--background-light);
    padding: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.process-number {
    font-size: 32px;
    font-weight: 800;
    color: #cbd5e1;
    margin-bottom: 15px;
}

.process-card h3 {
    font-size: 20px;
    color: var(--brand-primary);
    margin-bottom: 12px;
}

.process-card p {
    font-size: 14px;
    color: var(--text-muted);
}

/* --- Categories Section --- */
.categories-section {
    padding: 90px 0;
    background: var(--background-light);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
}

.category-box {
    background: #ffffff;
    padding: 35px 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s, transform 0.2s;
}

.category-box:hover {
    border-color: var(--brand-accent);
    transform: translateY(-2px);
}

.category-box i {
    font-size: 32px;
    color: var(--brand-accent);
    margin-bottom: 20px;
}

.category-box h3 {
    font-size: 18px;
    color: var(--brand-primary);
    margin-bottom: 10px;
}

.category-box p {
    font-size: 13.5px;
    color: var(--text-muted);
}

/* --- NEW CSS 1: Troubleshooting Section --- */
.trouble-section {
    padding: 90px 0;
    background: #ffffff;
}

.trouble-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.trouble-box {
    border: 1px dashed #cbd5e1;
    padding: 30px;
    border-radius: 8px;
}

.trouble-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
}

.trouble-header i {
    color: #f59e0b; /* Safety Orange */
    font-size: 20px;
}

.trouble-header h3 {
    font-size: 18px;
    color: var(--brand-primary);
}

.trouble-box p {
    font-size: 14px;
    color: var(--text-muted);
}

/* --- NEW CSS 2: Checklist Section --- */
.checklist-section {
    padding: 90px 0;
    background: #f1f5f9;
}

.checklist-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.checklist-text h2 {
    font-size: 30px;
    font-weight: 700;
    color: var(--brand-primary);
    margin-bottom: 15px;
}

.custom-checklist {
    list-style: none;
    margin-top: 25px;
}

.custom-checklist li {
    font-size: 15px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.custom-checklist i {
    color: var(--brand-success);
    font-size: 18px;
}

.checklist-visual .visual-box {
    background: #ffffff;
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.02);
}

.visual-box i {
    font-size: 45px;
    color: var(--brand-accent);
    margin-bottom: 15px;
}

.visual-box h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

/* --- NEW CSS 3: FAQ Section --- */
.faq-section {
    padding: 90px 0;
    background: #ffffff;
}

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

.faq-item {
    background: var(--background-light);
    border: 1px solid var(--border-color);
    padding: 25px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.faq-item h4 {
    font-size: 16px;
    color: var(--brand-primary);
    margin-bottom: 10px;
    font-weight: 600;
}

.faq-item p {
    font-size: 14px;
    color: var(--text-muted);
}

/* --- Contact and Form --- */
.contact-section {
    padding: 90px 0;
    background: var(--brand-primary);
    color: #ffffff;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-info h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-info p {
    color: #cbd5e1;
}

.contact-details {
    margin-top: 35px;
}

.contact-details p {
    margin-bottom: 12px;
    font-size: 15px;
}

.contact-details i {
    color: var(--brand-accent);
    margin-right: 10px;
}

.contact-form {
    background: #ffffff;
    padding: 40px;
    border-radius: 8px;
}

.contact-form h3 {
    color: var(--brand-primary);
    margin-bottom: 25px;
    font-size: 20px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    outline: none;
    font-size: 14px;
    color: var(--brand-primary);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--brand-accent);
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--brand-accent);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-submit:hover {
    background: #1d4ed8;
}

/* --- Safe Compliant Footer --- */
footer {
    background: #0f172a;
    border-top: 1px solid #1e293b;
    color: #94a3b8;
    padding: 50px 0;
    font-size: 14px;
}

footer .policy-disclaimer {
    margin-top: 25px;
    font-size: 11.5px;
    line-height: 1.6;
    color: #64748b;
    border-top: 1px solid #1e293b;
    padding-top: 20px;
}

/* --- Adaptive Layout --- */
@media (max-width: 768px) {
    .hero-grid, .contact-grid, .checklist-grid {
        grid-template-columns: 1fr;
    }
    .hero-text h1 {
        font-size: 30px;
    }
    .nav-menu {
        display: none;
    }
}
/* --- NEW CSS 4: Compatibility Section --- */
.compatibility-section {
    padding: 90px 0;
    background: var(--background-light);
    border-top: 1px solid var(--border-color);
}

.compatibility-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.compat-card {
    background: #ffffff;
    padding: 35px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.compat-icon {
    width: 60px;
    height: 60px;
    background: #eff6ff;
    color: var(--brand-accent);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
    font-size: 22px;
}

.compat-card h3 {
    font-size: 19px;
    color: var(--brand-primary);
    margin-bottom: 12px;
}

.compat-card p {
    font-size: 14px;
    color: var(--text-muted);
}

/* --- NEW CSS 5: Knowledge Section --- */
.knowledge-section {
    padding: 90px 0;
    background: #ffffff;
}

.knowledge-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.geometric-badge-box {
    background: var(--brand-primary);
    color: #ffffff;
    padding: 60px 40px;
    border-radius: 12px;
    text-align: center;
}

.geometric-badge-box i {
    font-size: 50px;
    color: var(--brand-accent);
    margin-bottom: 20px;
}

.geometric-badge-box h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.geometric-badge-box p {
    color: #94a3b8;
    font-size: 13.5px;
}

.knowledge-text h2 {
    font-size: 32px;
    color: var(--brand-primary);
    font-weight: 700;
    margin-bottom: 15px;
}

.module-points {
    margin-top: 30px;
}

.m-point {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.m-point i {
    font-size: 20px;
    color: var(--brand-accent);
    margin-top: 4px;
}

.m-point h4 {
    font-size: 17px;
    color: var(--brand-primary);
    margin-bottom: 5px;
}

.m-point p {
    font-size: 14px;
    color: var(--text-muted);
}

/* --- NEW CSS 6: Safety Parameters Section --- */
.safety-parameters-section {
    padding: 90px 0;
    background: var(--background-light);
    border-bottom: 1px solid var(--border-color);
}

.parameters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.param-box {
    background: #ffffff;
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.param-box i {
    font-size: 26px;
    color: #475569;
    margin-bottom: 15px;
}

.param-box h3 {
    font-size: 18px;
    color: var(--brand-primary);
    margin-bottom: 10px;
}

.param-box p {
    font-size: 13.5px;
    color: var(--text-muted);
}

/* Responsive updates */
@media (max-width: 768px) {
    .knowledge-grid {
        grid-template-columns: 1fr;
    }
}