:root {
    --primary-color: #007bff;
    --primary-dark: #0056b3;
    --secondary-color: #6c757d;
    --text-dark: #343a40;
    --text-light: #f8f9fa;
    --bg-light: #f8f9fa;
    --bg-dark: #212529;
    --border-color: #dee2e6;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --transition-speed: 0.3s ease-in-out;
    --shadow-light: 0 4px 15px rgba(0, 0, 0, 0.08);
    --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #fff;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
    color: var(--text-dark);
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; text-align: center; margin-bottom: 50px;}
h3 { font-size: 1.6rem; }
h4 { font-size: 1.2rem; }

p {
    margin-bottom: 15px;
    font-size: 1rem;
    line-height: 1.7;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

.section-padding {
    padding: 80px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.section-description {
    text-align: center;
    max-width: 700px;
    margin: -30px auto 60px auto;
    font-size: 1.1rem;
    color: var(--secondary-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-family: var(--font-heading);
    text-transform: uppercase;
    font-size: 0.95rem;
    transition: all var(--transition-speed);
    border: none;
    cursor: pointer;
}

.btn i {
    margin-left: 10px;
    transition: transform var(--transition-speed);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-light);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-dark);
}

.btn-primary:hover i {
    transform: translateX(5px);
}

.btn-secondary {
    background-color: var(--text-dark);
    color: var(--text-light);
}

.btn-secondary:hover {
    background-color: #000;
    transform: translateY(-3px);
}

.main-header {
    background-color: #fff;
    box-shadow: var(--shadow-light);
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color var(--transition-speed);
}

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

.main-header .logo {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.main-nav ul {
    display: flex;
}

.main-nav li {
    margin-left: 30px;
}

.main-nav a {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 1rem;
    position: relative;
    padding-bottom: 5px;
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 3px;
    background-color: var(--primary-color);
    transition: width var(--transition-speed);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text-dark);
}

.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://www.monash.edu.my/__data/assets/image/0006/3439176/electrocic-engineer-fixes-electronic-equipment.jpg') no-repeat center center/cover;
    color: var(--text-light);
    padding: 180px 0 120px;
    margin-top: 75px;
    display: flex;
    align-items: center;
    min-height: 70vh;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 3.2rem;
    margin-bottom: 25px;
    color: var(--text-light);
    font-weight: 700;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
}

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

.service-card {
    background-color: #fff;
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-dark);
}

.icon-box {
    background-color: var(--primary-color);
    color: var(--text-light);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    margin: 0 auto 25px;
    transition: background-color var(--transition-speed);
}

.service-card:hover .icon-box {
    background-color: var(--primary-dark);
}

.service-card p {
    font-size: 0.95rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.learn-more {
    display: inline-flex;
    align-items: center;
    font-weight: 600;
    color: var(--primary-color);
}

.learn-more i {
    margin-left: 8px;
    transition: transform var(--transition-speed);
}

.learn-more:hover i {
    transform: translateX(5px);
}

.about-flex {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
}

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

.about-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-dark);
    object-fit: cover;
    min-height: 300px;
}

.about-content {
    flex: 1;
    max-width: 600px;
}

.about-content h2 {
    text-align: left;
    margin-bottom: 25px;
}

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

.reason-card {
    background-color: var(--bg-light);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    transition: transform var(--transition-speed), background-color var(--transition-speed), color var(--transition-speed);
}

.reason-card:hover {
    transform: translateY(-8px);
    background-color: var(--primary-color);
    color: var(--text-light);
}

.reason-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: color var(--transition-speed);
}

.reason-card:hover i {
    color: var(--text-light);
}

.reason-card h3 {
    transition: color var(--transition-speed);
}

.reason-card:hover h3 {
    color: var(--text-light);
}

.reason-card p {
    color: var(--secondary-color);
    transition: color var(--transition-speed);
}

.reason-card:hover p {
    color: rgba(255, 255, 255, 0.9);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.testimonial-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-light);
    border-left: 5px solid var(--primary-color);
}

.testimonial-item p {
    font-style: italic;
    color: var(--text-dark);
    margin-bottom: 25px;
    font-size: 1.05rem;
}

.client-info {
    text-align: left;
}

.client-name {
    display: block;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-heading);
}

.client-title {
    display: block;
    font-size: 0.9rem;
    color: var(--secondary-color);
}


/* === İLETİŞİM BÖLÜMÜ === */
.contact-grid {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.contact-info, .contact-form {
    flex: 1;
}

.contact-info ul {
    margin-bottom: 30px;
}

.contact-info ul li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
    font-size: 1.05rem;
    color: var(--text-dark);
}

.contact-info ul li i {
    color: var(--primary-color);
    margin-right: 15px;
    font-size: 1.2rem;
    width: 25px; /* İkonların hizalanması için */
    margin-top: 4px;
}

.contact-info .social-links {
    margin-top: 30px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.contact-info .social-links a {
    font-size: 1.8rem;
    margin-right: 20px;
    color: var(--secondary-color);
}

.contact-info .social-links a:hover {
    color: var(--primary-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 14px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-body);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0,123,255,0.25);
}

.form-group textarea {
    resize: vertical;
}

.map-section {
    padding: 0;
    line-height: 0;
}

.map-section iframe {
    filter: grayscale(80%) invert(90%);
}

#newsletter {
    background-color: var(--bg-dark);
    color: var(--text-light);
    text-align: center;
}

#newsletter h2 {
    color: var(--text-light);
}

#newsletter p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    padding: 15px;
    border: none;
    border-radius: 5px;
    margin-bottom: 15px;
    font-size: 1rem;
    text-align: center;
}

.newsletter-form .btn-primary {
    cursor: pointer;
    font-size: 1.1rem;
}


/* === FOOTER === */
.main-footer {
    padding: 60px 0 30px;
    background-color: #2a2a2a;
    color: #ccc;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3, .footer-col h4 {
    color: var(--text-light);
    margin-bottom: 20px;
}

.footer-col p {
    color: #aaa;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    color: #ccc;
    transition: color 0.3s ease;
}

.footer-col ul a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    color: #aaa;
    font-size: 0.9rem;
}

.reveal-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-item.active {
    opacity: 1;
    transform: translateY(0);
}

/* Tablet (min-width: 768px) */
@media (min-width: 768px) {
    h1 { font-size: 3.2rem; }
    h2 { font-size: 2.5rem; }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-us-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-flex {
        flex-direction: row;
    }
    
    .contact-grid {
        flex-direction: row;
    }
    
    .newsletter-form {
        flex-direction: row;
    }
    
    .newsletter-form input {
        flex: 1;
        margin-bottom: 0;
        margin-right: 10px;
        text-align: left;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

@media (max-width: 767px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 75px; /* Header yüksekliği */
        left: 0;
        width: 100%;
        background-color: #fff;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        flex-direction: column;
    }

    .main-nav.active {
        display: flex; /* JS bu sınıfı ekleyecek */
    }

    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }

    .main-nav li {
        margin: 0;
        text-align: center;
    }

    .main-nav a {
        display: block;
        padding: 15px;
        border-bottom: 1px solid #eee;
    }
    
    .main-nav a::after {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-content p {
        font-size: 1.1rem;
    }
}