/* --- CSS Değişkenleri (Premium Dark / Midnight Theme) --- */
:root {
    /* Göz yormayan, derin ve sofistike koyu arka plan (Zinc 950) */
    --bg-color: #09090b; 
    --bg-surface: #18181b;
    
    /* Metin renklerinde parlamayan koyu mod dengi krem/açık gri */
    --text-primary: #f4f4f5;
    --text-muted: #a1a1aa;
    
    /* Marka renkleri: Parlak ancak göz almayan, karanlıkla zıt modern mavi */
    --accent-blue: #3b82f6;
    --accent-indigo: #6366f1;
    
    /* İnce, karanlıkta kaybolmayan zarif gri sınırlar */
    --border-color: #27272a;
    --border-hover: #3f3f46;

    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    
    --border-radius: 16px;
    --transition: all 0.2s ease-in-out;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.03em;
}

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

/* --- Tiografi & Faydalı Sınıflar --- */
.highlight {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.section-padding {
    padding: 100px 0;
}

.section-title {
    text-align: left;
    margin-bottom: var(--spacing-xl);
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
}

/* --- Butonlar --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    outline: none;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.95rem;
}

.btn-large {
    padding: 12px 24px;
    height: 54px;
}

.btn-primary {
    background: linear-gradient(to right, var(--accent-blue), var(--accent-indigo));
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.25);
    border-radius: 12px;
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
    transform: translateY(-2px);
}

.store-badge {
    height: 32px;
    width: auto;
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 20px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(9, 9, 11, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a:not(.btn) {
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.nav-links a:not(.btn):hover {
    color: var(--text-primary);
}

/* --- Hero Section --- */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: var(--bg-surface);
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 500px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hero-image-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
}

/* --- Minimalist Phone Mockup (Dark Mode) --- */
.phone-mockup {
    position: relative;
    border: 10px solid #27272a;
    border-radius: 40px;
    background: #09090b;
    box-shadow: 0 25px 60px -12px rgba(0, 0, 0, 0.8);
    overflow: hidden;
    width: 280px;
    height: 580px;
    z-index: 2;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 25px;
    background: #27272a;
    border-bottom-left-radius: 16px;
    border-bottom-right-radius: 16px;
    z-index: 10;
}

.app-screen {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    display: block;
}

/* --- Features Section --- */
.features {
    background: var(--bg-color);
}

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

.glass-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.glass-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.5);
    transform: translateY(-4px);
    background: #202024;
}

.icon-wrapper {
    color: var(--accent-blue);
    margin-bottom: 20px;
    background: rgba(59, 130, 246, 0.1);
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* --- Showcase Section --- */
.showcase {
    background: var(--bg-surface);
}

.showcase-container {
    display: flex;
    align-items: center;
    gap: 80px;
}

.showcase-content {
    flex: 1;
}

.showcase-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.showcase-content p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.benefit-list {
    list-style: none;
}

.benefit-list li {
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.showcase-image {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
    height: 650px;
    align-items: center;
}

.stacked {
    position: absolute;
}

.secondary-mockup {
    top: 60px;
    left: 0;
    z-index: 1;
    transform: scale(0.9);
    filter: blur(2px);
    opacity: 0.5;
}

.showcase-image .phone-mockup:not(.secondary-mockup) {
    z-index: 2;
    transform: translateX(40px);
}

.showcase-image:hover .secondary-mockup {
    filter: blur(0px);
    opacity: 0.9;
    transform: scale(0.9) translateX(-40px);
}

/* --- Footer --- */
.footer {
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 20px;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-desc {
    color: var(--text-muted);
    margin-top: 15px;
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-links h4, .footer-legal h4 {
    margin-bottom: 20px;
    font-size: 1rem;
}

.footer-links a, .footer-legal a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.footer-links a:hover, .footer-legal a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    text-align: left;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- Animasyonlar & Mobiliteler --- */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-left.visible, .fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.floating-anim {
    animation: floating 6s ease-in-out infinite;
}

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

@media (max-width: 992px) {
    .hero-title { font-size: 2.8rem; }
    .hero-container, .showcase-container {
        flex-direction: column;
        text-align: left;
        gap: 40px;
    }
    .hero-content, .showcase-content {
        max-width: 100%;
    }
    .showcase-image {
        height: 600px;
    }
    .footer-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links a:not(.btn) { display: none; }
    .hero-title { font-size: 2.2rem; }
    .section-title h2 { font-size: 2rem; }
}