/* Reset ve Temel Stiller */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 15px;
}

.nav {
    display: block;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    width: 150px;
    height: 40px;
    object-fit: contain;
}

.logo h2 {
    color: #2c3e50;
    font-weight: 700;
    font-size: 1.3rem;
    margin: 0;
    white-space: nowrap;
}

.logo a {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo a:hover {
    color: #3498db;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #3498db;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* Dropdown menüsü olan linklerde alt çizgi olmasın */
.dropdown > a::after {
    display: none;
}

/* Dropdown Menü */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    list-style: none;
    padding: 0;
    margin: 0;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid #eee;
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: #2c3e50;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.dropdown-menu a:hover {
    background-color: #f8f9fa;
    color: #3498db;
}

.dropdown a i {
    margin-left: 5px;
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.dropdown:hover a i,
.dropdown.active a i {
    transform: rotate(180deg);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #2c3e50;
    transition: all 0.3s ease;
    border-radius: 2px;
    transform-origin: center;
}

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

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

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

/* Hero Slider */
.hero {
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.slider {
    height: 100%;
    position: relative;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 1;
    visibility: hidden;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

.slide-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Eski mor overlay: background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%); */
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.7) 0%, rgba(52, 73, 94, 0.7) 100%);
    z-index: 2;
}

.slide.active {
    opacity: 1 !important;
    z-index: 10;
    visibility: visible !important;
}

.slide-content {
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 20px;
    animation: slideIn 1s ease;
    position: relative;
    z-index: 3;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.slide-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.cta-button:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

/* Bölüm Başlıkları */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-header p {
    font-size: 1.1rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
}

/* Hakkımızda */
.about {
    padding: 100px 0;
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: #555;
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #27ae60;
    font-weight: 500;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(52, 152, 219, 0.3);
}

.image-placeholder i {
    font-size: 4rem;
    color: white;
}

/* Hizmetler */
.services {
    padding: 100px 0;
    background: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
    border-color: #3498db;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
    transition: all 0.3s ease;
}

.service-icon i {
    font-size: 2rem;
    color: white;
}

.service-card h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: 600;
}

.service-card p {
    color: #7f8c8d;
    line-height: 1.6;
}

.service-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: #27ae60;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    box-shadow: 0 2px 8px rgba(39, 174, 96, 0.2);
}

.service-link:hover {
    background: #229954;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

/* İletişim */
.contact {
    padding: 100px 0;
    background: #f8f9fa;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    color: white;
    font-size: 1.2rem;
}

.contact-details h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.contact-details p {
    color: #7f8c8d;
    line-height: 1.6;
}

.contact-form {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.submit-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    justify-content: center;
}

.submit-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #ecf0f1;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #3498db;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    justify-content: flex-start;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #34495e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #3498db;
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 2rem;
    text-align: center;
    color: #bdc3c7;
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .logo-img {
        width: 140px;
        height: 38px;
    }
    
    .logo h2 {
        font-size: 1.3rem;
    }
    
    .nav {
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        height: 0;
        overflow: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }

    .nav.active {
        height: auto;
        max-height: 85vh;
        overflow-y: auto;
    }

    .nav-menu {
        flex-direction: column;
        padding: 0;
        list-style: none;
        gap: 0;
        margin: 0;
        height: auto;
    }
    
    .nav-menu li {
        border-bottom: 1px solid #eee;
        margin: 0;
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-menu a {
        display: block;
        padding: 1rem 2rem;
        font-size: 1.1rem;
        color: #2c3e50;
        transition: color 0.3s ease;
        text-decoration: none;
        margin: 0;
    }
    
    .nav-menu a:hover {
        color: #3498db;
        background: #f8f9fa;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: #f1f3f4;
        margin: 0;
        border-radius: 0;
        border-left: 3px solid #3498db;
        display: none;
        padding: 0;
        margin-top: 0;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
        animation: slideDown 0.3s ease;
    }
    
    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .dropdown-menu li {
        border-bottom: 1px solid #e9ecef;
        margin: 0;
    }
    
    .dropdown-menu li:last-child {
        border-bottom: none;
    }
    
    /* Mobilde dropdown menüdeki son öğenin altındaki çizgiyi kaldır */
    .dropdown-menu li:last-child {
        border-bottom: none !important;
    }
    
    .dropdown-menu a {
        padding: 0.8rem 2rem 0.8rem 3rem;
        font-size: 1rem;
        color: #666;
        background: transparent;
        transition: all 0.3s ease;
    }
    
    .dropdown-menu a:hover {
        background-color: #e9ecef;
        color: #3498db;
        padding-left: 3.5rem;
    }
    
    .slider-nav {
        width: 40px;
        height: 40px;
    }
    
    .prev-slide {
        left: 10px;
    }
    
    .next-slide {
        right: 10px;
    }
    
    .scroll-down-arrow {
        bottom: 100px;
    }

        .slide-content {
        max-width: 90%;
        padding: 0 40px;
    }
    
    .slide-title {
        font-size: 2.5rem;
    }
    
    .slide-description {
        font-size: 1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .features {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }

    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .logo-img {
        width: 120px;
        height: 32px;
    }
    
    .logo h2 {
        font-size: 1.2rem;
    }
    
    .scroll-down-arrow {
        bottom: 120px;
    }
    
    .slide-content {
        max-width: 95%;
        padding: 0 30px;
    }
    
    .slide-title {
        font-size: 2rem;
    }

    .cta-button {
        padding: 12px 24px;
        font-size: 1rem;
    }

    .service-card {
        padding: 2rem;
    }

    .contact-form {
        padding: 2rem;
    }
} 

.scroll-down-arrow {
    position: absolute;
    left: 50%;
    bottom: 80px;
    transform: translateX(-50%);
    z-index: 20;
    cursor: pointer;
    animation: bounceDown 2s infinite;
    background: #222;
    border-radius: 50%;
    padding: 14px 18px;
    box-shadow: 0 2px 10px rgba(44,62,80,0.1);
    transition: background 0.3s;
}
.scroll-down-arrow:hover {
    background: #444;
    color: #fff;
}
.scroll-down-arrow i {
    font-size: 2rem;
    color: #fff;
    transition: color 0.3s;
}
@keyframes bounceDown {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(15px); }
}

/* Slider Navigation Arrows */
.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: #fff;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.slider-nav:hover {
    background: #e6f0fa;
    color: #217dbb;
    transform: translateY(-50%) scale(1.1);
}

.slider-nav i {
    font-size: 1.5rem;
    color: #3498db;
    transition: color 0.3s ease;
}

.slider-nav:hover i {
    color: #217dbb;
}

.prev-slide {
    left: 20px;
}

.next-slide {
    right: 20px;
}

/* Slider dots ve noktalar kaldırıldı */
.slider-dots, .dot { display: none !important; }

/* Hizmet Sayfaları Stilleri */
.hero-service {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    color: #2c3e50;
    padding: 120px 0 80px;
    text-align: center;
}

.hero-service .hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-service .hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.service-content {
    padding: 80px 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.main-content h2 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.main-content h3 {
    color: #2c3e50;
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    font-weight: 600;
}

.main-content p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.main-content ul {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.main-content ul li {
    margin-bottom: 0.5rem;
    color: #666;
    line-height: 1.6;
}

.sidebar .service-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.sidebar .service-card h4 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.sidebar .service-card p {
    color: #666;
    margin-bottom: 0.5rem;
}

.sidebar .service-card ul {
    list-style: none;
    padding: 0;
}

.sidebar .service-card ul li {
    padding: 0.5rem 0;
    color: #666;
    border-bottom: 1px solid #eee;
}

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

.contact-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    margin-top: 1rem;
}

.contact-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

.faq-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    margin: 60px 0;
}

.faq-section h2 {
    text-align: center;
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 600;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.faq-item {
    background: white;
    border-radius: 10px;
    margin-bottom: 1rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: #f8f9fa;
}

.faq-question h3 {
    color: #2c3e50;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.faq-question i {
    color: #666;
    font-size: 0.9rem;
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: #666;
    line-height: 1.6;
    display: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    margin: 0;
    color: #666;
    line-height: 1.8;
    word-wrap: break-word;
    white-space: normal;
}

/* BTU Hesaplama */
.btu-calculator {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.btu-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

.btu-info h3 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.btu-info p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.region-coefficients {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.region-coefficients h4 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.region-coefficients ul {
    list-style: none;
    padding: 0;
}

.region-coefficients li {
    padding: 0.8rem 0;
    border-bottom: 1px solid #eee;
    color: #666;
    font-size: 1rem;
}

.region-coefficients li:last-child {
    border-bottom: none;
}

.region-coefficients strong {
    color: #2c3e50;
    font-weight: 600;
}

.btu-form {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.btu-form h3 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 2rem;
    font-weight: 600;
    text-align: center;
}

.contact-form-info {
    text-align: center;
    padding: 2rem;
}

.contact-form-info h3 {
    color: #2c3e50;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.contact-form-info p {
    color: #7f8c8d;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.contact-form-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #3498db;
    color: white;
    padding: 15px 30px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.contact-form-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.btu-form .form-group {
    margin-bottom: 1.5rem;
}

.btu-form label {
    display: block;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-weight: 500;
}

.btu-form label::before {
    content: '* ';
    color: #e74c3c;
}

.btu-form select,
.btu-form input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.btu-form select:focus,
.btu-form input:focus {
    outline: none;
    border-color: #3498db;
}

.calculate-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.calculate-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.calculate-btn i {
    margin-right: 0.5rem;
}

.btu-result {
    margin-top: 2rem;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #3498db;
}

.btu-result h4 {
    color: #2c3e50;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.result-box p {
    margin: 0.5rem 0;
    color: #666;
    font-size: 1rem;
}

.result-box strong {
    color: #2c3e50;
    font-weight: 600;
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-service .hero-content h1 {
        font-size: 2rem;
    }
    
    .main-content h2 {
        font-size: 2rem;
    }
    
    .faq-section h2 {
        font-size: 2rem;
    }
    
    .btu-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .btu-form {
        padding: 2rem;
    }
}

/* reCAPTCHA Hata Mesajlarını Gizle */
.grecaptcha-error,
.grecaptcha-error-message,
.grecaptcha-error-text {
    display: none !important;
}

/* Toast Notification */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    padding: 16px 20px;
    z-index: 10000;
    transform: translateX(400px);
    transition: all 0.5s ease;
    min-width: 300px;
    max-width: 400px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

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

.toast-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.toast.success .toast-icon {
    color: #27ae60;
}

.toast.error .toast-icon {
    color: #e74c3c;
}

.toast-message {
    color: #333;
    font-size: 0.95rem;
    line-height: 1.4;
}