body {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

/* hero section */
.hero-container {
    text-align: center;
    padding-top: 60px;
    padding-bottom: 40px;
    width: 100%;
    max-width: 800px;
}

/* logo efect */
.logo-placeholder {
    width: auto;
    height: auto;
    margin: 0 auto 20px;
    background: transparent;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;

    /* logo arkası glow */
    box-shadow: 0 0 40px rgba(136, 0, 255, 0.4);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.slogan {
    font-size: 1.2rem;
    color: #b3b3b3;
    margin-bottom: 40px;
    font-weight: 300;
}

/* buttons */
.button-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    width: 90%;
    max-width: 1000px;
    padding-bottom: 60px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    /* Yarı saydam cam efekti */
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.3);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 15px;
    /* İkonları da Rainbow yapalım */
    background: linear-gradient(90deg, #00c6ff, #0072ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #fff;
}

.feature-desc {
    font-size: 0.9rem;
    color: #aaa;
    line-height: 1.5;
}

.animated-button {
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 28px;
    border: 4px solid;
    border-color: transparent;
    font-size: 18px;
    background-color: inherit;
    border-radius: 100px;
    font-weight: 600;
    color: #f1f1f1;
    box-shadow: 0 0 0 2px #ffffff;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.animated-button svg {
    position: absolute;
    width: 24px;
    fill: rgb(244, 244, 244);
    z-index: 9;
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.animated-button .arr-1 {
    right: 14px;
}

.animated-button .arr-2 {
    left: -25%;
}

.animated-button .circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background-color: #ffffff;
    border-radius: 50%;
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.animated-button .text {
    position: relative;
    z-index: 1;
    transform: translateX(-12px);
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.animated-button:hover {
    box-shadow: 0 0 0 12px transparent;
    color: #000000;
    border-radius: 12px;
}

.animated-button:hover .arr-1 {
    right: -25%;
}

.animated-button:hover .arr-2 {
    left: 16px;
}

.animated-button:hover .text {
    transform: translateX(12px);
}

.animated-button:hover svg {
    fill: #212121;
}

.animated-button:active {
    scale: 0.95;
    box-shadow: 0 0 0 4px #a29bfe;
}

.animated-button:hover .circle {
    width: 220px;
    height: 220px;
    opacity: 1;
}