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

body {
    min-height: 100vh;
    background: #0f0f23;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: system-ui, sans-serif;
}

.center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 50px;
}

/* ===== موشن گرافیک ===== */
.motion-box {
    width: 200px;
    height: 200px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.core {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    box-shadow: 
        0 0 30px #667eea,
        0 0 60px #667eea55;
    animation: pulse 2s ease-in-out infinite;
}

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

.orbit {
    position: absolute;
    width: 160px;
    height: 160px;
    border: 2px dashed #ffffff22;
    border-radius: 50%;
    animation: spin 8s linear infinite;
}

.orbit .planet {
    position: absolute;
    width: 16px;
    height: 16px;
    background: #f093fb;
    border-radius: 50%;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 15px #f093fb;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== دکمه ===== */
.btn {
    padding: 16px 40px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    border-radius: 50px;
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 10px 30px #667eea55;
}

.btn:hover {
    transform: scale(1.05);
}

.btn:active {
    transform: scale(0.95);
}