:root {
    --clr-primary: #1e3a8a;
    --clr-primary-light: #3b82f6; 
    --clr-secondary: #0f172a;
    --clr-text-main: #334155;
    --clr-text-light: #64748b;
    --clr-bg-main: #f8fafc;
    --clr-white: #ffffff;

    --font-main: 'Inter', sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    color: var(--clr-text-main);
    background-color: var(--clr-bg-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

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

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--clr-primary);
    color: var(--clr-white);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: var(--clr-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-whatsapp {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: #25D366;
    color: var(--clr-white);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.btn-whatsapp:hover {
    background-color: #128C7E;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: var(--clr-white);
    border: 2px solid var(--clr-white);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}

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

/* Header */
.header {
    background-color: var(--clr-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo img {
    height: 50px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 600;
    color: var(--clr-secondary);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--clr-primary);
    transition: var(--transition);
}

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

.call-btn {
    animation: pulse 2s infinite;
}

.call-btn .call-number {
    display: none;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(30, 58, 138, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(30, 58, 138, 0); }
    100% { box-shadow: 0 0 0 0 rgba(30, 58, 138, 0); }
}

/* Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.menu-toggle .bar {
    height: 3px;
    width: 100%;
    background-color: var(--clr-secondary);
    border-radius: 3px;
    transition: var(--transition);
}

/* Mobile Nav */
.mobile-nav {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--clr-white);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transform: translateY(-150%);
    transition: transform 0.4s ease-in-out;
    z-index: 999;
}

.mobile-nav.active {
    transform: translateY(0);
}

.mobile-nav a {
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(15, 23, 42, 0.7), rgba(30, 58, 138, 0.6)), url('../images/hero.png') center/cover no-repeat;
    padding: 8rem 0 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    display: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    color: var(--clr-white);
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero h1 span {
    color: #60a5fa; /* lighter blue for dark bg */
}

.hero p {
    font-size: 1.125rem;
    color: #e2e8f0;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Inner Page Header */
.page-header {
    background-color: var(--clr-bg-main);
    padding: 4rem 0 3rem;
    text-align: center;
    border-bottom: 1px solid #e2e8f0;
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--clr-secondary);
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--clr-text-light);
    font-size: 1.1rem;
}

/* Hakkımızda Section */
.about-section {
    padding: 5rem 0;
    background-color: var(--clr-white);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.05rem;
    color: var(--clr-text-main);
    line-height: 1.8;
}

.about-content p {
    margin-bottom: 1.5rem;
}

.about-content h2 {
    color: var(--clr-secondary);
    margin-top: 3rem;
    margin-bottom: 1rem;
}

/* Services */
.services {
    padding: 5rem 0;
    background-color: var(--clr-white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--clr-secondary);
    margin-bottom: 0.5rem;
}

.section-subtitle {
    text-align: center;
    color: var(--clr-text-light);
    margin-bottom: 3rem;
}

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

.service-card {
    background-color: var(--clr-bg-main);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--clr-primary-light);
}

.service-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(59,130,246,0.1);
    color: var(--clr-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
}

.service-card h3 {
    font-size: 1.25rem;
    color: var(--clr-secondary);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--clr-text-light);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    background-color: var(--clr-secondary);
    color: var(--clr-white);
    padding: 4rem 0 0 0;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    justify-content: space-between;
    margin-bottom: 3rem;
}

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

.footer-info h2 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.footer-info p {
    color: #94a3b8;
    margin-bottom: 1.5rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

.contact-item svg {
    color: var(--clr-primary-light);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item a {
    color: #cbd5e1;
    line-height: 1.5;
}

.contact-item a:hover {
    color: var(--clr-white);
}

.footer-cta {
    background-color: rgba(255,255,255,0.05);
    padding: 2rem;
    border-radius: 12px;
    flex: 0 1 400px;
}

.footer-cta h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.footer-cta p {
    color: #cbd5e1;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.footer-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.footer-bottom {
    background-color: #020617;
    text-align: center;
    padding: 1.5rem;
    color: #64748b;
    font-size: 0.875rem;
}

/* Media Queries */
@media (max-width: 768px) {
    .nav-links, .call-text {
        display: none;
    }
    
    .header-actions .btn-primary,
    .header-actions .btn-whatsapp {
        padding: 0.75rem;
        width: 42px;
        height: 42px;
    }

    .header-actions .btn-whatsapp span {
        display: none;
    }

    .header-actions {
        gap: 0.5rem;
    }

    .menu-toggle {
        display: flex;
    }

    .logo img {
        height: 40px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-cta {
        flex-basis: auto;
    }
}