/* --- GENEL AYARLAR --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /* Modern Font */
}

body {
    background-color: #050505;
    /* Derin Siyah */
    color: #ffffff;
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* --- ARKA PLAN ANIMASYONU (CANVAS) --- */
#star-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
}

/* --- NAVBAR --- */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 80px;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.logo {
    font-size: 26px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #ffffff, #e0e0e0);
    color: #000;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.3);
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    text-decoration: none;
    color: #b0b0b0;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s, text-shadow 0.3s;
}

.nav-links a:hover {
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.btn-register-link {
    color: #ff9f43 !important;
    font-weight: 700 !important;
}

.btn-login-nav {
    padding: 10px 25px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    color: white;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-login-nav:hover {
    background: rgba(255, 159, 67, 0.2);
    border-color: #ff9f43;
    color: #ff9f43;
    box-shadow: 0 0 20px rgba(255, 159, 67, 0.3);
}

/* --- HERO BÖLÜMÜ --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 100px 20px 50px;
    position: relative;
    overflow: hidden;
}

/* Arka plan ışık efektleri */
.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 159, 67, 0.1) 0%, rgba(0, 0, 0, 0) 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    pointer-events: none;
}

.hero h1 {
    font-size: 63px;
    margin-bottom: 25px;
    line-height: 1.1;
    font-weight: 700;
    background: linear-gradient(180deg, #ffffffbf 0%, #a0a0a0 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -2px;
    animation: slideUp 0.8s ease-out;
}

.hero span {
    background: linear-gradient(45deg, #ff9f43, #ffa16b);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 20px;
    color: #cccccc;
    max-width: 700px;
    margin-bottom: 50px;
    font-weight: 300;
    animation: slideUp 0.8s ease-out 0.2s backwards;
}

/* Büyük CTA Butonu */
.cta-button {
    padding: 18px 50px;
    background: linear-gradient(45deg, #ff9f43, #ff5e57);
    color: white;
    text-decoration: none;
    font-size: 18px;
    font-weight: 700;
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(255, 159, 67, 0.3);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s;
    animation: slideUp 0.8s ease-out 0.4s backwards;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 40px rgba(255, 159, 67, 0.5);
}

/* --- ÖZELLİKLER KARTLARI --- */
.features {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 30px;
    padding: 0 50px 100px;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: 24px;
    width: 350px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    animation: fadeIn 1s ease-out 0.6s backwards;
}

.feature-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 159, 67, 0.5);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(255, 159, 67, 0.1), transparent 50%);
    opacity: 0;
    transition: opacity 0.4s;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 20px;
    background: rgba(255, 159, 67, 0.1);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    color: #ff9f43;
    border: 1px solid rgba(255, 159, 67, 0.2);
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #fff;
    font-weight: 600;
}

.feature-card p {
    font-size: 15px;
    color: #a0a0a0;
    line-height: 1.6;
}

/* --- FOOTER --- */
footer {
    text-align: center;
    padding: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: #666;
    font-size: 13px;
    background: #020202;
}

/* Animasyonlar */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Mobil Uyum */
@media (max-width: 900px) {
    nav {
        padding: 20px;
    }

    .hero h1 {
        font-size: 48px;
    }

    .nav-links {
        display: none;
    }

    .features {
        flex-direction: column;
        align-items: center;
        margin-top: 0;
    }

    .feature-card {
        width: 100%;
    }
}