:root {
    --primary-bg: #030712; /* Daha koyu, derin uzay siyahı */
    --card-bg: rgba(17, 24, 39, 0.7);
    --accent-blue: #00D2FF; /* Logodaki parlak elektrik mavisi */
    --accent-gold: #FACC15; /* Logodaki canlı altın sarısı */
    --text-main: #F9FAFB;
    --text-muted: #9CA3AF;
    --success: #10B981;
    --transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

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

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

#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(ellipse at bottom, #1B2735 0%, #090A0F 100%);
    overflow: hidden;
}

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

/* Navbar */
.navbar {
    padding: 20px 0;
    position: fixed;
    width: 100%;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

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

.nav-symbol {
    height: 36px;
    width: auto;
    mix-blend-mode: screen; /* Siyah arka planı yok eder, renkleri parlatır */
    filter: drop-shadow(0 0 10px rgba(0, 210, 255, 0.4));
}

.logo-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    line-height: 1;
}

.sirius-text {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.8rem;
    color: var(--accent-blue);
    letter-spacing: 2px;
}

.toner-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 300;
    letter-spacing: 4px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.ebay-btn-nav {
    background: var(--accent-gold);
    color: #000 !important;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 700;
}

.ebay-btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(249, 189, 48, 0.3);
}

/* Hero Section */
.hero {
    padding: 180px 0 100px;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.feedback-badge {
    background: rgba(46, 164, 79, 0.15);
    border: 1px solid var(--success);
    color: var(--success);
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    gap: 8px;
}

h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 20px;
    font-weight: 800;
}

.highlight {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.slogan {
    letter-spacing: 4px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 40px;
    font-size: 0.9rem;
}

.hero-actions {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 15px 35px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: none;
}

.primary-btn {
    background: var(--accent-gold);
    color: #000;
}

.primary-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(249, 189, 48, 0.2);
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.hero-visual {
    position: relative;
}

.toner-glow-container {
    position: relative;
    z-index: 1;
}

.glow-orb {
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(77, 168, 218, 0.3) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    filter: blur(50px);
    z-index: -1;
    animation: pulse 4s infinite alternate;
}

@keyframes pulse {
    0% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

.hero-img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

/* Features */
.features {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-blue);
    background: rgba(77, 168, 218, 0.05);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.feature-card p {
    color: var(--text-muted);
}

/* Products */
.products {
    padding: 100px 0;
    background-color: rgba(10, 15, 25, 0.4);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-blue);
    box-shadow: 0 10px 30px rgba(0, 210, 255, 0.15);
}

.product-image {
    width: 100%;
    height: 200px;
    object-fit: contain;
    background: #fff; /* Fotoğraflar genelde beyaz arkaplanlı */
    padding: 20px;
}

.product-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-title {
    font-size: 1rem;
    margin-bottom: 15px;
    font-weight: 600;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.product-price {
    font-size: 1.3rem;
    color: var(--accent-gold);
    font-weight: 800;
    margin-bottom: 15px;
}

.buy-btn {
    display: block;
    text-align: center;
    padding: 10px;
    background: var(--primary-bg);
    color: var(--accent-blue);
    text-decoration: none;
    border-radius: 8px;
    border: 1px solid var(--accent-blue);
    font-weight: 600;
    transition: var(--transition);
}

.buy-btn:hover {
    background: var(--accent-blue);
    color: #000;
}

/* Newsletter */
.newsletter {
    padding: 100px 0;
}

.newsletter-box {
    background: linear-gradient(135deg, rgba(77, 168, 218, 0.1) 0%, rgba(249, 189, 48, 0.1) 100%);
    padding: 60px;
    border-radius: 30px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.newsletter-box h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.newsletter-box p {
    margin-bottom: 40px;
    color: var(--text-muted);
}

.cta-form {
    display: flex;
    gap: 15px;
    max-width: 700px;
    margin: 0 auto;
}

.cta-form input {
    flex: 1;
    padding: 15px 25px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    outline: none;
    transition: var(--transition);
}

.cta-form input:focus {
    border-color: var(--accent-blue);
}

.form-success {
    margin-top: 20px;
    color: var(--success);
    font-weight: 700;
    display: none;
}

/* Footer */
footer {
    background: #05070A;
    padding: 80px 0 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 100px;
    margin-bottom: 60px;
}

.footer-info .logo {
    margin-bottom: 20px;
}

.footer-links h4 {
    margin-bottom: 25px;
    font-size: 1.2rem;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-muted);
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.8rem;
}

/* Mobile Responsive */
@media (max-width: 968px) {
    h1 { font-size: 3rem; }
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .hero-actions { justify-content: center; }
    .features-grid { grid-template-columns: 1fr; }
    .cta-form { flex-direction: column; }
    .footer-content { grid-template-columns: 1fr; gap: 40px; }
}