:root {
    --primary: #0056b3;
    --secondary: #8E8E8E;
    --accent: #FF9900;
    --light: #F5F7FA;
    --dark: #333333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    line-height: 1.6;
    color: #000;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background-color: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

.nav-btn {
    background-color: var(--accent);
    color: white;
    padding: 0.7rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s;
}

.nav-btn:hover {
    background-color: #e58900;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('img/extender.webp') no-repeat center center/cover;
    color: white;
    text-align: center;
    padding: 8rem 1rem;
    margin-top: 70px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: #FC0;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: #e58900;
}

.btn-secondary {
    background-color: transparent;
    color: white;
    padding: 1rem 2rem;
    border: 2px solid white;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary);
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Problems */
.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.problem-card {
    text-align: center;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.problem-card:hover {
    transform: translateY(-5px);
}

.problem-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.problem-card h3 {
    margin: 1rem 0;
    color: var(--primary);
}

/* Why Bentrol Section */
.why-bentrol {
    background-color: var(--light);
}

.features-container {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    align-items: center;
}

.feature-image {
    flex: 1;
    min-width: 300px;
}

.feature-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.feature-content {
    flex: 1;
    min-width: 300px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.feature-icon {
    background-color: var(--primary);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 1.5rem;
}

.feature-text h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

/* Product Introduction Section */
.product-intro {
    background-color: white;
}

.intro-content {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
}

.intro-text {
    flex: 2;
    min-width: 300px;
}

.intro-text h3 {
    color: var(--primary);
    margin: 2rem 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.application-card {
    display: flex;
    gap: 1.5rem;
    margin: 1.5rem 0;
    padding: 1.5rem;
    background-color: var(--light);
    border-radius: 8px;
    box-shadow: 0 3px 8px rgba(0,0,0,0.1);
}

.app-icon {
    background-color: var(--primary);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.app-icon i {
    font-size: 1.5rem;
}

.app-content h4 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.note-box {
    background-color: #e9f5ff;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary);
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
}

.note-box i {
    color: var(--primary);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.intro-image {
    flex: 1;
    min-width: 300px;
}

.intro-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.performance-data {
    background-color: var(--light);
    padding: 1.5rem;
    border-radius: 8px;
}

.performance-data h4 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.performance-data ul {
    list-style-type: none;
}

.performance-data li {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.performance-data i {
    color: green;
}

/* Technical Data */
.tech-specs {
    background-color: var(--light);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    background: white;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: var(--primary);
    color: white;
}

tr:hover {
    background-color: #f1f1f1;
}

.improvement {
    color: green;
    font-weight: bold;
}

/* Packing Section */
.packing-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.packing-card {
    text-align: center;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.packing-card:hover {
    transform: translateY(-5px);
}

.packing-image {
    margin-bottom: 1.5rem;
}

.packing-image img {
    width: 100%;
    border-radius: 8px;
}

.packing-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.packing-card ul {
    text-align: left;
    margin-top: 1rem;
    list-style-type: none;
}

.packing-card li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.packing-card li:before {
    content: "✓";
    color: green;
    position: absolute;
    left: 0;
}

.packing-note {
    background-color: #e9f5ff;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

/* Testimonials Section */
.testimonials {
    background-color: var(--light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.testimonial-card:hover {
    transform: translateY(-5px);
}

.testimonial-content {
    position: relative;
    margin-bottom: 1.5rem;
}

.testimonial-content i {
    font-size: 2rem;
    color: var(--primary);
    opacity: 0.2;
    position: absolute;
    top: -10px;
    left: -10px;
}

.testimonial-content p {
    font-style: italic;
    line-height: 1.8;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-details h4 {
    color: var(--primary);
    margin-bottom: 0.2rem;
}

.author-details p {
    color: var(--secondary);
    font-size: 0.9rem;
}

/* Contact Section */
.contact {
    background-color: var(--primary);
    color: white;
}

.contact .section-title h2 {
    color: white;
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-info h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2rem;
    gap: 1rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--accent);
    margin-top: 0.3rem;
}

.contact-item h4 {
    margin-bottom: 0.5rem;
}

.contact-form {
    flex: 1;
    min-width: 300px;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    color: var(--dark);
}

.contact-form h3 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.contact-form iframe {
    border: none;
    border-radius: 8px;
}

/* WhatsApp Float Button */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 40px;
    right: 40px;
    background-color: #25d366;
    color: white;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.whatsapp-float:hover {
    background-color: #128c7e;
    transform: scale(1.1);
}

footer {
    background-color: var(--dark);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

    .problems-grid {
        grid-template-columns: 1fr;
    }
    
    .features-container {
        flex-direction: column;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }
    
    .intro-content {
        flex-direction: column;
    }
    
    .application-card {
        flex-direction: column;
        text-align: center;
    }
    
    .note-box {
        flex-direction: column;
        text-align: center;
    }
    
    .packing-options {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        flex-direction: column;
    }
    
    .whatsapp-float {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
        font-size: 24px;
    }
}