/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Professional scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f3f4;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #1e40af, #2563eb);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== ULTRA-PROFESSIONAL HEADER STYLES ===== */
/* Cache bust: 2025-09-10 15:08 */
header {
    position: relative;
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    margin-bottom: 80px;
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #1e40af 0%, #3b82f6 25%, #60a5fa 50%, #3b82f6 75%, #1e40af 100%);
    background-size: 300% 100%;
    animation: professionalShimmer 10s ease-in-out infinite;
}

header::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.02) 0%, rgba(30, 64, 175, 0.02) 100%);
    pointer-events: none;
}

@keyframes professionalShimmer {
    0% { background-position: 300% 0; }
    50% { background-position: -300% 0; }
    100% { background-position: 300% 0; }
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 3;
    max-width: 1200px;
    margin: 0 auto;
    padding: 28px 36px;
    min-height: 92px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 20px;
    position: relative;
    z-index: 3;
    padding: 18px 26px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.04) 0%, rgba(30, 64, 175, 0.04) 100%);
    border-radius: 14px;
    border: 1px solid rgba(59, 130, 246, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-section:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(30, 64, 175, 0.08) 100%);
    border-color: rgba(59, 130, 246, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
}

.logo-icon {
    font-size: 2.4rem;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 50%, #60a5fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 2px 4px rgba(59, 130, 246, 0.3));
    transition: all 0.3s ease;
}

.logo-section:hover .logo-icon {
    transform: scale(1.05);
    filter: drop-shadow(0 4px 8px rgba(59, 130, 246, 0.4));
}

.logo-text h1 {
    font-size: 1.8rem;
    margin: 0;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: -0.02em;
    line-height: 1.15;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

.logo-text .tagline {
    font-size: 0.875rem;
    margin: 0;
    font-weight: 400;
    color: #64748b;
    margin-top: 6px;
    letter-spacing: 0.005em;
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

.nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    flex-wrap: nowrap;
    align-items: center;
    position: relative;
    z-index: 3;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: 6px;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-menu a {
    color: #475569;
    text-decoration: none;
    font-weight: 500;
    padding: 12px 20px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.875rem;
    position: relative;
    border-radius: 10px;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    min-width: 42px;
    letter-spacing: 0.005em;
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(30, 64, 175, 0.1) 100%);
    border-radius: 12px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-menu a:hover {
    color: #1e40af;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(30, 64, 175, 0.08) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

.nav-menu a:hover::before {
    opacity: 1;
}

.nav-menu a.active {
    color: #ffffff;
    font-weight: 600;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    box-shadow: 0 3px 8px rgba(59, 130, 246, 0.25), 0 1px 3px rgba(30, 64, 175, 0.15);
    transform: translateY(-0.5px);
}

.nav-menu a.active::before {
    opacity: 0;
}

/* ===== HAMBURGER MENU STYLES ===== */
.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #3b82f6, #1e40af);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    position: relative;
    z-index: 1001;
}

/* Show hamburger menu on mobile devices */
@media (max-width: 768px) {
    .hamburger-menu {
        display: flex !important;
        background: #ff0000 !important; /* Temporary red background for testing */
        border: 2px solid #000000 !important; /* Black border for visibility */
        margin-left: auto;
        order: 2;
    }
}

.hamburger-menu:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.hamburger-line {
    width: 20px;
    height: 2px;
    background: #ffffff;
    margin: 2px 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 1px;
}

.hamburger-menu.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-menu.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ===== MAIN CONTENT STYLES ===== */
h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.banner {
    margin-bottom: 40px;
    position: relative;
    width: 100%;
    overflow: hidden;
    z-index: 1;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

.banner-image {
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    position: relative;
    background: #f8f9fa;
}

.banner-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
    max-width: 100%;
    object-fit: cover;
    position: relative;
    z-index: 1;
}

.banner-image:hover img {
    transform: scale(1.02);
}

/* Ensure banner scrolls properly on all devices */
@media (max-width: 768px) {
    .banner {
        margin-bottom: 20px;
    }
    
    .banner-image {
        border-radius: 15px;
    }
}

@media (max-width: 480px) {
    .banner {
        margin-bottom: 15px;
    }
    
    .banner-image {
        border-radius: 10px;
    }
}

.how-to-use {
    margin-bottom: 40px;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    color: #1e3a8a;
}

.section-title h3 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    text-shadow: none;
}

.section-title p {
    font-size: 1.2rem;
    opacity: 0.8;
    color: #64748b;
}

/* ===== PRODUCT OVERVIEW STYLES ===== */
.product-overview {
    padding: 80px 0;
    background: white;
    margin-bottom: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

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

.overview-text h3 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #1e3a8a;
}

.overview-text p {
    font-size: 1.1rem;
    color: #64748b;
    margin-bottom: 30px;
}

.overview-image img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

/* ===== FEATURES SECTION STYLES ===== */
.features {
    padding: 80px 0;
    background: #f8fafc;
    margin-bottom: 40px;
    border-radius: 20px;
}

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

.feature-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    border: 1px solid #e2e8f0;
}

.feature-card:hover {
    -webkit-transform: translateY(-5px);
    -moz-transform: translateY(-5px);
    -ms-transform: translateY(-5px);
    -o-transform: translateY(-5px);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.feature-icon img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

/* Responsive styling for feature icon images */
@media (max-width: 768px) {
    .feature-icon img {
        width: 35px;
        height: 35px;
    }
}

@media (max-width: 480px) {
    .feature-icon img {
        width: 30px;
        height: 30px;
    }
}

.feature-card h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #1e3a8a;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

/* ===== HOW TO USE STYLES ===== */
.how-to-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.how-to-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid #e2e8f0;
}

.how-to-item:hover {
    transform: translateY(-5px);
}

.step-number {
    background: linear-gradient(135deg, #3b82f6, #1e40af);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 20px;
}

.how-to-item h4 {
    color: #1e3a8a;
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.how-to-item p {
    color: #64748b;
    line-height: 1.6;
}

.how-to-image {
    margin: 20px 0;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.how-to-image img {
    width: 100%;
    height: auto;
    display: block;
}

.play-button-overlay {
    position: relative;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.play-button-overlay:hover {
    transform: scale(1.05);
}

.play-button-overlay::after {
    content: '▶';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(59, 130, 246, 0.9);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

/* ===== SPECIFICATIONS STYLES ===== */
.specifications {
    padding: 80px 0;
    background: white;
    margin-bottom: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.spec-item {
    background: #f8fafc;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    border: 1px solid #e2e8f0;
    transition: transform 0.3s ease;
}

.spec-item:hover {
    transform: translateY(-3px);
}

.spec-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    display: block;
}

.spec-item h4 {
    color: #1e3a8a;
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.spec-item p {
    color: #64748b;
    font-size: 0.95rem;
}

/* ===== ENHANCED FOOTER STYLES ===== */
footer {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 30%, #334155 70%, #475569 100%);
    color: white;
    padding: 80px 0 30px;
    margin-top: 80px;
    border-top: 4px solid transparent;
    background-clip: padding-box;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa, #93c5fd, #dbeafe, #3b82f6);
    background-size: 200% 100%;
    animation: shimmer 3s ease-in-out infinite;
}

footer::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.02)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.02)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.01)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.01)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.01)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.footer-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 50px;
    margin-bottom: 60px;
}

.footer-section {
    background: rgba(255, 255, 255, 0.03);
    padding: 30px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.footer-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.footer-section:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.footer-section:hover::before {
    opacity: 1;
}

.footer-section h4 {
    color: #3b82f6;
    font-size: 1.4rem;
    margin-bottom: 25px;
    border-bottom: 2px solid rgba(59, 130, 246, 0.3);
    padding-bottom: 15px;
    font-weight: 700;
    letter-spacing: 0.5px;
    position: relative;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 50px;
    height: 2px;
    background: #3b82f6;
    border-radius: 1px;
}

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    padding: 8px 0;
    border-radius: 8px;
    padding-left: 12px;
}

.footer-section a:hover {
    color: #3b82f6;
    background: rgba(59, 130, 246, 0.1);
    transform: translateX(5px);
}

.company-info {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.company-info::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, transparent, #3b82f6, transparent);
}

.company-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    padding: 20px 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.company-logo span {
    font-size: 2.5rem;
    color: #3b82f6;
    filter: drop-shadow(0 0 15px rgba(59, 130, 246, 0.4));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.company-logo h5 {
    font-size: 1.5rem;
    color: #e2e8f0;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.certifications {
    color: #94a3b8;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    padding: 15px 30px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: inline-block;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #94a3b8;
    font-size: 0.95rem;
    position: relative;
}

.footer-bottom::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, #64748b, transparent);
}

.footer-bottom p {
    margin-bottom: 8px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

/* ===== ENHANCED FLOATING QUOTE BUTTON STYLES ===== */
.floating-quote-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    text-align: center;
}

.quote-button {
    background: linear-gradient(135deg, #3b82f6, #1e40af, #1e3a8a);
    background-size: 200% 200%;
    color: white;
    border: none;
    padding: 18px 30px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 15px 35px rgba(59, 130, 246, 0.4), 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.quote-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.quote-button:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 25px 50px rgba(59, 130, 246, 0.5), 0 10px 25px rgba(0, 0, 0, 0.3);
    background-position: 100% 100%;
}

.quote-button:hover::before {
    left: 100%;
}

.quote-button:active {
    transform: translateY(-2px) scale(1.02);
}

.phone-icon {
    font-size: 1.3rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    animation: ring 2s ease-in-out infinite;
}

@keyframes ring {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(15deg); }
    75% { transform: rotate(-15deg); }
}

.quote-description {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(30, 41, 59, 0.98));
    color: white;
    padding: 20px;
    border-radius: 15px;
    margin-top: 15px;
    font-size: 0.9rem;
    line-height: 1.5;
    max-width: 320px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 10px 20px rgba(59, 130, 246, 0.2);
    opacity: 0;
    transform: translateY(15px) scale(0.95);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(59, 130, 246, 0.2);
    backdrop-filter: blur(10px);
    position: relative;
}

.quote-description::before {
    content: '';
    position: absolute;
    top: -8px;
    right: 30px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid rgba(15, 23, 42, 0.98);
}

.floating-quote-btn:hover .quote-description {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* ===== VIDEO POPUP STYLES ===== */
.video-popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.video-popup {
    position: relative;
    width: 600px;
    height: 400px;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
    transform: scale(1);
    transition: transform 0.3s ease;
}

.video-popup-content {
    position: relative;
    width: 100%;
    padding: 20px;
}

.video-popup-header {
    background: #f8f9fa;
    padding: 20px;
    border-bottom: 1px solid #dee2e6;
    position: relative;
}

.video-popup-title {
    margin: 0;
    color: #2c3e50;
    font-size: 1.2rem;
    font-weight: 600;
}

.video-popup-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 28px;
    cursor: pointer;
    z-index: 10001;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.video-popup-close:hover {
    background: rgba(0, 0, 0, 0.9);
}

.video-popup-content h3 {
    margin: 0;
    padding: 20px;
    background: #f8f9fa;
    color: #2c3e50;
    font-size: 1.2rem;
    border-bottom: 1px solid #e9ecef;
}

.video-popup-content iframe {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 10px;
}

.video-popup-content {
    position: relative;
    width: 100%;
    height: 100%;
    padding: 0;
}

/* Video popup mobile responsiveness */
@media (max-width: 768px) {
    .video-popup {
        width: 80%;
        max-width: 600px;
        height: auto;
        aspect-ratio: 3/2;
    }
    
    /* Fallback for browsers without aspect-ratio support */
    @supports not (aspect-ratio: 3/2) {
        .video-popup {
            height: calc(80vw * 2/3);
            max-height: 400px;
        }
    }
    
    .video-popup-content iframe {
        height: 100%;
    }
    
    .video-popup-close {
        width: 40px;
        height: 40px;
        font-size: 24px;
        top: 10px;
        right: 15px;
    }
}

@media (max-width: 480px) {
    .video-popup {
        width: 95%;
        max-width: 400px;
        height: auto;
        aspect-ratio: 3/2;
    }
    
    /* Fallback for browsers without aspect-ratio support */
    @supports not (aspect-ratio: 3/2) {
        .video-popup {
            height: calc(95vw * 2/3);
            max-height: 300px;
        }
    }
    
    .video-popup-content iframe {
        height: 100%;
    }
    
    .video-popup-title {
        padding: 15px;
        font-size: 1.1rem;
    }
    
    .video-popup-close {
        width: 35px;
        height: 35px;
        font-size: 20px;
        top: 8px;
        right: 12px;
    }
}

/* Feature Pointers Styling - Compact */
.feature-pointers {
    margin-top: 15px;
    padding: 0;
    list-style: none;
}

.feature-pointers li {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    padding: 6px 0;
    border-bottom: 1px solid #f1f5f9;
    transition: all 0.3s ease;
}

.feature-pointers li:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.feature-pointers li:hover {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: 6px 10px;
    border-radius: 6px;
    border-bottom: 1px solid transparent;
    transform: translateX(3px);
}

.pointer-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #232D85 0%, #1e40af 100%);
    border-radius: 50%;
    color: white;
    box-shadow: 0 1px 4px rgba(35, 45, 133, 0.2);
}

.feature-pointers li strong {
    color: #232D85;
    font-weight: 700;
    font-size: 0.9rem;
    margin-right: 6px;
}

.feature-pointers li {
    color: #64748b;
    font-size: 0.85rem;
    line-height: 1.4;
}

/* Responsive design for feature pointers - Compact */
@media (max-width: 768px) {
    .feature-pointers {
        margin-top: 12px;
    }
    
    .feature-pointers li {
        gap: 6px;
        margin-bottom: 6px;
        padding: 5px 0;
    }
    
    .feature-pointers li:hover {
        padding: 5px 8px;
        transform: translateX(2px);
    }
    
    .pointer-icon {
        font-size: 1rem;
        width: 20px;
        height: 20px;
    }
    
    .feature-pointers li strong {
        font-size: 0.85rem;
    }
    
    .feature-pointers li {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .feature-pointers {
        margin-top: 10px;
    }
    
    .feature-pointers li {
        gap: 5px;
        margin-bottom: 5px;
        padding: 4px 0;
    }
    
    .feature-pointers li:hover {
        padding: 4px 6px;
        transform: translateX(1px);
    }
    
    .pointer-icon {
        font-size: 0.9rem;
        width: 18px;
        height: 18px;
    }
    
    .feature-pointers li strong {
        font-size: 0.8rem;
    }
    
    .feature-pointers li {
        font-size: 0.75rem;
    }
}

/* How-to image clickable styling */
.how-to-image a {
    display: block;
    position: relative;
    transition: transform 0.3s ease;
}

.how-to-image a:hover {
    transform: scale(1.05);
}

.how-to-image a img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}

.how-to-image a:hover img {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* Ensure Software training app image displays properly */
.how-to-item:nth-child(7) .how-to-image img {
    width: 100%;
    height: auto;
    max-width: 300px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: block;
    margin: 0 auto;
}

.how-to-item:nth-child(7) .how-to-image a:hover img {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* ===== SUPPORT PAGE STYLES ===== */
.header {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    padding: 30px 0;
    margin-bottom: 40px;
    border-bottom: 3px solid #3b82f6;
}

.header-content {
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.back-link {
    display: inline-block;
    background: #3b82f6;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 25px;
    margin-bottom: 30px;
    transition: all 0.3s ease;
}

.back-link:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

/* ===== USER MANUALS STYLES ===== */
.manuals-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 40px;
}

.manual-section {
    margin-bottom: 40px;
}

.manual-section h2 {
    color: #1e3a8a;
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 10px;
}

.manual-section h3 {
    color: #334155;
    font-size: 1.3rem;
    margin: 25px 0 15px 0;
}

.manual-section p {
    margin-bottom: 15px;
    color: #64748b;
    line-height: 1.7;
}

.manual-section ul {
    margin: 15px 0;
    padding-left: 30px;
}

.manual-section li {
    margin-bottom: 10px;
    color: #64748b;
}

.download-box {
    background: #f0f9ff;
    border: 2px solid #0ea5e9;
    padding: 25px;
    border-radius: 15px;
    margin: 20px 0;
}

.download-box h4 {
    color: #0369a1;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.download-box p {
    color: #0369a1;
    margin-bottom: 15px;
}

.download-button {
    display: inline-block;
    background: #0ea5e9;
    color: white;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.download-button:hover {
    background: #0284c7;
    transform: translateY(-2px);
}

.video-tutorial {
    background: #fef3c7;
    border: 2px solid #f59e0b;
    padding: 25px;
    border-radius: 15px;
    margin: 20px 0;
}

.video-tutorial h4 {
    color: #92400e;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.video-tutorial p {
    color: #92400e;
    margin-bottom: 15px;
}

.contact-info {
    background: #f8fafc;
    padding: 25px;
    border-radius: 15px;
    border-left: 4px solid #3b82f6;
    margin-top: 30px;
}

.contact-info h3 {
    color: #1e3a8a;
    margin-bottom: 15px;
}

.contact-info p {
    margin-bottom: 8px;
    color: #64748b;
}

.last-updated {
    text-align: center;
    color: #94a3b8;
    font-style: italic;
    margin-top: 30px;
}

/* ===== FAQ SECTION STYLES ===== */
.faq-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 40px;
}

.faq-item {
    margin-bottom: 30px;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 20px;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    color: #1e3a8a;
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.faq-answer {
    color: #64748b;
    line-height: 1.7;
}

/* ===== TROUBLESHOOTING STYLES ===== */
.troubleshooting-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 40px;
}

.troubleshooting-section {
    margin-bottom: 40px;
}

.troubleshooting-section h2 {
    color: #1e3a8a;
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 10px;
}

.troubleshooting-section h3 {
    color: #334155;
    font-size: 1.3rem;
    margin: 25px 0 15px 0;
}

.troubleshooting-section p {
    margin-bottom: 15px;
    color: #64748b;
    line-height: 1.7;
}

.troubleshooting-section ul {
    margin: 15px 0;
    padding-left: 30px;
}

.troubleshooting-section li {
    margin-bottom: 10px;
    color: #64748b;
}

/* ===== MOBILE APP DOWNLOAD STYLES ===== */
.app-download-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 40px;
}

.app-section {
    margin-bottom: 40px;
}

.app-section h2 {
    color: #1e3a8a;
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 10px;
}

.app-section h3 {
    color: #334155;
    font-size: 1.3rem;
    margin: 25px 0 15px 0;
}

.app-section p {
    margin-bottom: 15px;
    color: #64748b;
    line-height: 1.7;
}

.download-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin: 20px 0;
}

.download-btn {
    background: linear-gradient(135deg, #3b82f6, #1e40af);
    color: white;
    padding: 15px 25px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.qr-section {
    text-align: center;
    margin: 30px 0;
}

.qr-code {
    width: 200px;
    height: 200px;
    background: #f1f3f4;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 3rem;
    color: #64748b;
}

/* ===== WEB PORTAL ACCESS STYLES ===== */
.portal-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 40px;
}

.portal-section {
    margin-bottom: 40px;
}

.portal-section h2 {
    color: #1e3a8a;
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 10px;
}

.portal-section h3 {
    color: #334155;
    font-size: 1.3rem;
    margin: 25px 0 15px 0;
}

.portal-section p {
    margin-bottom: 15px;
    color: #64748b;
    line-height: 1.7;
}

.login-form {
    background: #f8fafc;
    padding: 30px;
    border-radius: 15px;
    border: 1px solid #e2e8f0;
    margin: 20px 0;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #334155;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.login-btn {
    background: linear-gradient(135deg, #3b82f6, #1e40af);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.quick-link {
    background: #f8fafc;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    text-decoration: none;
    color: #334155;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.quick-link:hover {
    background: #3b82f6;
    color: white;
    transform: translateY(-3px);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        text-align: left;
        gap: 20px;
        padding: 20px;
        min-height: 80px;
    }
    
    .logo-section {
        padding: 12px 20px;
        gap: 16px;
        flex: 1;
    }
    
    .logo-text h1 {
        font-size: 1.5rem;
    }
    
    .logo-text .tagline {
        font-size: 0.8rem;
    }
    
    .nav {
        position: relative;
        display: flex;
        justify-content: flex-end;
        align-items: center;
    }
    
    .hamburger-menu {
        display: flex !important;
        margin-left: auto;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        right: 0;
        width: 280px;
        background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15), 0 4px 20px rgba(0, 0, 0, 0.1);
        border-radius: 16px;
        padding: 20px;
        flex-direction: column;
        gap: 8px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        border: 1px solid #e2e8f0;
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-menu a {
        padding: 16px 24px;
        font-size: 0.9rem;
        min-height: 48px;
        width: 100%;
        border-radius: 12px;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        background: #f8fafc;
        border: 1px solid #e2e8f0;
        color: #475569;
        font-weight: 500;
    }
    
    .nav-menu a:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(59, 130, 246, 0.2);
        background: #e0f2fe;
        border-color: #3b82f6;
    }
    
    .nav-menu a.active {
        background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
        color: #ffffff;
        font-weight: 600;
        box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4), 0 2px 8px rgba(30, 64, 175, 0.3);
        transform: translateY(-2px);
        border: 1px solid #1e40af;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .how-to-grid {
        grid-template-columns: 1fr;
    }
    
    .spec-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-sections {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .floating-quote-btn {
        bottom: 20px;
        right: 20px;
    }
    
    .download-buttons {
        flex-direction: column;
    }
    
    .quick-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .section-title h3 {
        font-size: 2rem;
    }
    
    .feature-card,
    .how-to-item,
    .spec-item {
        padding: 20px;
    }
    
    .manuals-content,
    .faq-content,
    .troubleshooting-content,
    .app-download-content,
    .portal-content {
        padding: 25px;
    }
    
    /* Mobile-specific improvements */
    header {
        margin-bottom: 60px;
    }
    
    .header-content {
        padding: 16px;
        gap: 16px;
    }
    
    .logo-section {
        padding: 8px 12px;
        gap: 12px;
    }
    
    .logo-text h1 {
        font-size: 1.2rem;
        line-height: 1.2;
    }
    
    .logo-text .tagline {
        font-size: 0.7rem;
        margin-top: 2px;
    }
    
    .hamburger-menu {
        width: 40px;
        height: 40px;
        margin-left: auto;
    }
    
    .hamburger-line {
        width: 18px;
        height: 2px;
    }
    
    .nav-menu {
        width: 260px;
        right: -10px;
        padding: 16px;
    }
    
    .nav-menu a {
        padding: 14px 20px;
        font-size: 0.85rem;
        min-height: 44px;
    }
    
    .overview-text h3 {
        font-size: 1.8rem;
    }
    
    .overview-text p {
        font-size: 1rem;
    }
    
    .feature-card h4 {
        font-size: 1.1rem;
    }
    
    .feature-card p {
        font-size: 0.9rem;
    }
    
    .how-to-item h4 {
        font-size: 1.1rem;
    }
    
    .how-to-item p {
        font-size: 0.9rem;
    }
    
    .spec-item h4 {
        font-size: 1rem;
    }
    
    .spec-item p {
        font-size: 0.85rem;
    }
    
    .floating-quote-btn {
        bottom: 15px;
        right: 15px;
    }
    
    .quote-button {
        padding: 15px 25px;
        font-size: 1rem;
    }
    
    .quote-description {
        font-size: 0.8rem;
        padding: 15px;
        max-width: 280px;
    }
}

/* Additional mobile breakpoints for better responsiveness */
@media (max-width: 600px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 10px;
    }
    
    .logo-text h1 {
        font-size: 1.6rem;
    }
    
    .nav-menu a {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
    
    .feature-card,
    .how-to-item,
    .spec-item {
        padding: 15px;
    }
    
    .floating-quote-btn {
        bottom: 10px;
        right: 10px;
    }
    
    .quote-button {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .feature-card:hover,
    .how-to-item:hover,
    .spec-item:hover {
        transform: none;
    }
    
    .nav-menu a:hover {
        transform: none;
    }
    
    .quote-button:hover {
        transform: none;
    }
}

/* High DPI display support */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo-icon {
        font-size: 2.2rem;
    }
    
    .feature-icon {
        font-size: 2.8rem;
    }
    
    .spec-icon {
        font-size: 2.3rem;
    }
}

/* ===== VIDEO TUTORIALS GRID STYLES ===== */
.video-tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.video-tutorial-item {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.video-tutorial-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.video-tutorial-item h4 {
    color: #1e3a8a;
    font-size: 1.2rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.video-tutorial-item p {
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.6;
}

.video-tutorial-item .download-button {
    background: #3b82f6;
    color: white;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    margin-top: auto;
    align-self: flex-start;
}

.video-tutorial-item .download-button:hover {
    background: #1e40af;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

/* ===== MANUAL TABLE OF CONTENTS STYLES ===== */
.manual-toc {
    background: #f8fafc;
    padding: 30px;
    border-radius: 15px;
    margin: 30px 0;
    border: 1px solid #e2e8f0;
}

.manual-toc h3 {
    color: #1e3a8a;
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
    border-bottom: 2px solid #3b82f6;
    padding-bottom: 10px;
}

.manual-toc ol {
    counter-reset: item;
    padding-left: 0;
}

.manual-toc ol > li {
    display: block;
    margin-bottom: 15px;
    counter-increment: item;
    font-weight: 600;
    color: #1e3a8a;
}

.manual-toc ol > li:before {
    content: counter(item) ". ";
    font-weight: 700;
    color: #3b82f6;
    margin-right: 8px;
}

.manual-toc ol > li ul {
    margin-top: 10px;
    padding-left: 25px;
}

.manual-toc ol > li ul li {
    font-weight: 400;
    color: #64748b;
    margin-bottom: 5px;
    list-style-type: disc;
}

.manual-toc ol > li ul li:before {
    content: none;
}

/* ===== RESPONSIVE UPDATES FOR NEW COMPONENTS ===== */
@media (max-width: 768px) {
    .video-tutorials-grid {
        grid-template-columns: 1fr;
    }
    
    .manual-toc {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .video-tutorial-item {
        padding: 20px;
    }
    
    .manual-toc {
        padding: 15px;
    }
}

/* ===== CROSS-BROWSER COMPATIBILITY ===== */

/* IE11 and older browser support */
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
    .features-grid,
    .how-to-grid,
    .spec-grid,
    .footer-sections {
        display: -ms-flexbox;
        -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    }
    
    .feature-card,
    .how-to-item,
    .spec-item {
        -ms-flex: 1 1 300px;
        flex: 1 1 300px;
        margin-bottom: 30px;
    }
}

/* Firefox specific fixes */
@-moz-document url-prefix() {
    .header-content {
        -moz-box-pack: justify;
    }
    
    .logo-section {
        -moz-box-align: center;
    }
}

/* Safari specific fixes */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
    .header-content {
        -webkit-box-pack: justify;
    }
    
    .logo-section {
        -webkit-box-align: center;
    }
}

/* Fallback for browsers that don't support CSS Grid */
@supports not (display: grid) {
    .features-grid,
    .how-to-grid,
    .spec-grid,
    .footer-sections {
        display: -webkit-box;
        display: -webkit-flex;
        display: -moz-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-flex-wrap: wrap;
        -moz-flex-wrap: wrap;
        -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    }
    
    .feature-card,
    .how-to-item,
    .spec-item {
        -webkit-box-flex: 1;
        -webkit-flex: 1 1 300px;
        -moz-box-flex: 1;
        -ms-flex: 1 1 300px;
        flex: 1 1 300px;
        margin: 15px;
    }
}

/* Fallback for browsers that don't support flexbox */
@supports not (display: flex) {
    .header-content {
        display: block;
        text-align: center;
    }
    
    .logo-section {
        display: inline-block;
        vertical-align: middle;
        margin-bottom: 20px;
    }
    
    .nav-menu {
        display: block;
        text-align: center;
    }
    
    .nav-menu li {
        display: inline-block;
        margin: 0 10px;
    }
}

/* Ensure proper rendering in all browsers */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Fix for older browsers that don't support CSS custom properties */
:root {
    --primary-color: #3b82f6;
    --secondary-color: #1e3a8a;
    --text-color: #2c3e50;
    --background-color: #f8f9fa;
}

/* Ensure proper box-sizing for all elements */
*,
*::before,
*::after {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

/* Fix for older browsers that don't support backdrop-filter */
@supports not (backdrop-filter: blur(10px)) {
    .footer-section {
        background: rgba(255, 255, 255, 0.1);
    }
    
    .logo-section {
        background: rgba(255, 255, 255, 0.15);
    }
}

/* Fix for older browsers that don't support CSS Grid gap */
@supports not (gap: 30px) {
    .features-grid > * + *,
    .how-to-grid > * + *,
    .spec-grid > * + * {
        margin-top: 30px;
    }
}