:root {
    --primary-color: #0F172A; /* Premium Navy */
    --secondary-color: #1E293B; /* Lighter Navy */
    --accent-color: #D4AF37; /* Premium Gold */
    --accent-hover: #FDE047; /* Lighter Gold */
    --bg-light: #F8FAFC;
    --text-dark: #0F172A;
    --text-main: #334155;
    --text-muted: #64748B;
    --white: #FFFFFF;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(212, 175, 55, 0.4);
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .logo-text {
    font-family: 'Outfit', sans-serif;
    color: var(--text-dark);
}

.highlight {
    color: var(--accent-color);
}

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

/* Typography */
h1 { font-size: 3.5rem; line-height: 1.1; margin-bottom: 1.5rem; font-weight: 800; }
h2 { font-size: 2.5rem; margin-bottom: 1rem; font-weight: 700; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; font-weight: 600; }
p { margin-bottom: 1rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-full {
    width: 100%;
}

/* Navbar */
.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo i {
    color: var(--accent-color);
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.nav-highlight-link {
    background: rgba(212, 175, 55, 0.1);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    color: var(--accent-color) !important;
    border: 1px dashed var(--accent-color);
}

.nav-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem 0;
    background: linear-gradient(135deg, var(--bg-light) 0%, #e2e8f0 100%);
    min-height: 90vh;
    display: flex;
    align-items: center;
}

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

.hero-badge {
    display: inline-block;
    background-color: rgba(212, 175, 55, 0.2);
    color: #b48a1a;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(212, 175, 55, 0.5);
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--text-main);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.trust-indicators {
    display: flex;
    gap: 1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.trust-indicators i {
    color: #22c55e;
}

.hero-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 5rem;
    color: rgba(255,255,255,0.1);
    position: relative;
    box-shadow: var(--shadow-lg);
}

.floating-card {
    position: absolute;
    bottom: -20px;
    left: -20px;
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 2.5rem;
    color: var(--accent-color);
}

.floating-card strong {
    display: block;
    font-size: 1.5rem;
    color: var(--primary-color);
    line-height: 1;
}

.floating-card span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

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

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

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem auto;
}

/* Features (Neden Biz) */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(212, 175, 55, 0.1);
    color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem auto;
}

/* Services */
.services {
    background-color: var(--primary-color);
}

.services .section-header h2, .services .section-header p {
    color: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: center;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: scale(1.02);
}

.service-header {
    text-align: center;
    margin-bottom: 2rem;
}

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

.service-features {
    list-style: none;
    margin-bottom: 2rem;
}

.service-features li {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.service-features i {
    color: #22c55e;
    font-size: 0.8rem;
}

.featured-service {
    transform: scale(1.05);
    border: 2px solid var(--accent-color);
    z-index: 2;
}

.featured-service:hover {
    transform: scale(1.07);
}

.featured-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-color);
    color: var(--primary-color);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: var(--shadow-sm);
}

/* Cross-Sell */
.cross-sell {
    background-color: var(--bg-light);
}

.cross-sell-container {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: var(--radius-lg);
    padding: 4rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.cross-sell-content h2 {
    color: var(--white);
    font-size: 2.5rem;
}

.cross-sell-content p {
    color: #cbd5e1;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.product-benefits {
    list-style: none;
    margin-bottom: 2rem;
}

.product-benefits li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-weight: 500;
}

.product-benefits i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

.phone-mockup {
    width: 250px;
    height: 500px;
    background-color: #0f172a;
    border: 12px solid #334155;
    border-radius: 36px;
    margin: 0 auto;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f59e0b, #eab308);
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #0f172a;
    text-align: center;
    padding: 1rem;
}

.phone-screen i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.phone-screen span {
    font-weight: 800;
    font-size: 1.5rem;
    font-family: 'Outfit';
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: #94a3b8;
    padding-top: 4rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--white);
    background-color: rgba(255,255,255,0.1);
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-3px);
}

.footer h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-contact i {
    color: var(--accent-color);
}

.footer-bottom {
    background-color: #020617;
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 992px) {
    h1 { font-size: 2.8rem; }
    .hero-container, .cross-sell-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-buttons {
        justify-content: center;
    }
    .trust-indicators {
        justify-content: center;
    }
    .services-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    .featured-service {
        transform: scale(1);
    }
    .featured-service:hover {
        transform: scale(1.02);
    }
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .social-links {
        justify-content: center;
    }
    .footer-contact li {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-btn {
        display: none; /* Mobile menu handled via JS if needed, hidden for now */
    }
    .hamburger {
        display: block;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .hero-buttons {
        flex-direction: column;
    }
    .cross-sell-container {
        padding: 2rem;
    }
}

/* Testimonials */
.testimonials { background-color: var(--white); }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.testimonial-card { background: var(--bg-light); padding: 2rem; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); position: relative; border-top: 4px solid var(--accent-color); transition: transform 0.3s ease; }
.testimonial-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.quote-icon { color: rgba(212, 175, 55, 0.2); font-size: 3rem; position: absolute; top: 10px; right: 20px; }
.testimonial-card p { font-style: italic; color: var(--text-main); margin-bottom: 1.5rem; position: relative; z-index: 1; }
.testimonial-author strong { display: block; color: var(--primary-color); font-size: 1.1rem; }
.testimonial-author span { color: var(--text-muted); font-size: 0.9rem; }
@media (max-width: 992px) { .testimonials-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; } }